Modification method of mono-crystalline silicon wafer surfaces for solar batteries

The invention provides a modification method of mono-crystalline silicon wafer surfaces for solar batteries in order to overcome the defects of antireflection coating process and surface texture process. The method is used for preparing mono-crystalline silicon wafers selectively absorbing solar spectra, and the technical scheme utilized includes placing mono-crystalline silicon wafers in a corrosion solution, adding metal ion compounds with catalytic activity into the solution, controlling the temperature and time of the reaction, and obtaining the mono-crystalline silicon wafers selectively absorbing solar spectra through the surface modification of ion catalysis to the mono-crystalline silicon wafers. According to the mono-crystalline silicon wafers after being processed, the average reflectance of wavelengths ranging from 350 nm to 1000 nm is reduced to below 9%, and the average reflectance of wavelengths ranging from 1100 nm to 2500 nm is increased to above 56%.

Method for preventing bottom holes of circuit board from being blocked in copper plating

The invention discloses a method for preventing bottom holes of a circuit board from being blocked in copper plating. After holes are formed in the circuit board in a drilling mode, electroless copper plating and full-plate flash plating are carried out, so the thickness of copper in each hole reaches 5-7um, then a segmentation drilling mode is adopted, drilling is carried out according to the back drilling depth ratio of 1:2:3:4, and a drill bit is taken out after drilling is carried out each time, so formed copper wires and glue residues are taken out from the holes. Due to the segmentation drilling mode, scraps in back drilling holes can be effectively removed, and the problem of hole blocking caused by the fact that the copper wires and the glue residues are difficult to remove is avoided, and quality of products is improved.

Method for manufacturing multi-layer circuit board with internal connecting finger

The invention discloses a method for manufacturing a multi-layer circuit board with an internal connecting finger. The method comprises the following steps: first, manufacturing an inner layer boards, laminating the inner layer boards into a multilayer board, making a pattern on the multilayer board to form the connecting finger, and performing electrogilding treatment on the connecting finger; and then forming a window, which is wider than the connecting finger, in a non-flowing prepreg, enabling the window of the non-flowing prepreg to correspond to the connecting finger of the multilayer board in position, covering the upper surface and the lower surface of the non-flowing prepreg with copper foil, laminating the non-flowing prepreg and the connecting finger together, cutting off copper foil in a position corresponding to the connecting finger on the multilayer board to form the stepped multi-layer circuit board with the internal connecting finger. The connecting finger part of the multi-layer ...

Tree brushing machine

The invention discloses a tree brushing machine. The tree brushing machine comprises a brushing machine frame, a self-adaptive moving and clamping mechanism, a slurry storage mechanism, a slurry supply mechanism, a movable brushing mechanism and a driving system, wherein mounting holes and mounting frames are respectively formed and arranged on the brushing machine frame and used for mounting other mechanisms and systems; the self-adaptive moving and clamping mechanism is used for performing walking and trunk clamping functions of the brushing machine; the slurry storage mechanism is used for storing and stirring slurry; the slurry supply mechanism is used for realizing automatic and real-time slurry supply during operation; the movable brushing mechanism enables the tree brushing machine to adapt to harsh terrain and specially-shaped trunks; and the driving system provides power for the tree brushing machine so as to ensure stable working of the brushing machine. The tree brushing machine ...

Outer line etching method of PCB (Printed Circuit Board) board with PTH (Plated Through Hole) inter-hole clamping line

The invention discloses an outer line etching method of a PCB (Printed Circuit Board) board with a PTH (Plated Through Hole) inter-hole clamping line, and the PCB board with the PTH inter-hole clamping line is etched for many times. The method comprises the steps of: first, primarily etching a PTH inter-hole clamping line region with a fine line easily caused, cleaning the board after etching to a standard width, and sticking dry films on a PTH and the inter-hole clamping line region which are qualified in etching for protection; then, secondarily etching the board till lines with corresponding requirements are etched in other regions of the board; and finally, retreating the films. Compared with the prior art, the outer line etching method has the advantages that the etching width of the PTH inter-hole clamping line of the PCB board is guaranteed, the product quality is improved, and the problems of halfway etching and high product rejection rate are avoided under the premise of not reducing ...

Novel self-assembly method of ordered Ge/Si quantum dot array by nano-pore replication and sputtering deposition

The invention provides a method of self-assembly growth of a large-area, even and ordered Ge quantum dot array on a Si substrate by sputtering deposition. The method includes preparation of ultrathin Si-based AAO (anodic aluminum oxide), preparation of a pattern substrate by nano-pore replication, and self-assembly growth of the even, ordered Ge quantum dot array on the surface of the pattern substrate by ion beam sputtering. Quantum dot growth process matching with the pattern substrate is obtained by controlling ion beam sputtering deposition temperature, ion beam flux voltage, and buffer layer thickness, so that Ge quantum dot nano-pores evenly and orderly grow at nucleation center. Even-size Ge quantum dots obtained are in hexagonal symmetrical distribution on the surface of the Si substrate, and the diameter of the quantum dots is adjustable. The method effectively overcomes the defects that distribution of the self-assembled Ge/Si quantum dots is random and disorder in position, the ...

Light emitting diode (LED) fluorescent powder with single matrix white light excited by near ultraviolet and preparation method thereof

The invention discloses a light emitting diode (LED) fluorescent powder with single matrix white light excited by near ultraviolet and a preparation method thereof, the chemical formula of fluorescent powder is that: NM1-x-y-zPO4:xR, yG, zB, wherein N is freely selected from at least one of a group formed by Li, Na and K; M is freely selected from at least one of a group formed by Mg, Ca, Sr, Ba and Zn; R is freely selected from at least one of a group formed by Mn and Sm; G is Tb; and B is freely selected from at least one of a group formed by Ce and Eu, and x is higher than 0 but lower than 0.25, y is higher than 0 but lower than 0.25, and z is higher than 0 but lower than 0.25. The particle size of the prepared fluorescent according to the method provided by the invention is small and uniform, doping of fluorescent material activator on a molecule level is realized, three bands of red, green and blue can be emitted by excitation of near ultraviolet of 350-410nm, the color display index ...

Preparation and application of mixed structure PLGA-PLL-PEG targeting polymer carrier

The invention relates to the technical field of polymer materials, and particularly relates to preparation and application of a mixed structure PLGA-PLL-PEG (Polylactide Acid Glycolic Acid-Polylysine-Polyethylene Glycol) targeting polymer carrier. The preparation is characterized in that polylactide acid glycolic acid and side chain protected polylysine are acted by a dehydrating agent and then connected in the block way to form a midbody; the midbody is deprotected and then connected with activated polyethylene glycol in the grafting manner, so that the polylactide acid glycolic acid-polylysine-polyethylene glycol polymer having the molecular weight of 4*10 <4> to the power of 4 to 5*10<5> is obtained. The polymer is used for carrying various medicines and also capable of being coupled with various ligands to realize targeted medicine delivery. The preparation of the polymer carrier provided by the invention is few in synthesis steps, mild in reaction conditions, available in materials ...

Method and device for filtering junk files based on key words

The invention provides a method and a device for filtering junk files based on key words. The method comprises steps of acquiring a Chinese file to be detected, converting Chinese characters of the Chinese file into spelling characters, obtaining a spelling file, matching the spelling file in accordance with spelling corresponding to Chinese key words, and determining that the Chinese file to be detected is a junk file if spelling characters in the spelling file is matched to the spelling corresponding to Chinese key words. A spelling key word can correspond to a plurality of Chinese key words, the number of key words is reduced, the matching efficiency of key words is improved, spelling key words can correspond to other Chinese key words which are not listed in Chinese key words and have the same homophony with Chinese key words, and the distinguishing efficiency of junk files is improved.

Method for judging load shedding of electric power system unit on basis of local electric quantity

The invention relates to a method for judging load shedding of an electric power system unit on the basis of local electric quantity. Running current information and power information of the unit before startup are firstly preserved; through judging whether active power rapidly declines or not in a disturbing process, the absolute value of the active power after the disturbance is finished is judged, the absolute value of an active current after the disturbance is finished is judged and whether the system frequency gradually declines or not in the disturbing process is judged; if conditions of all above steps are satisfied, the unit is judged as load shedding after a time of Ts1 is delayed. According to the method, the unit is judged as load shedding by relying on the local electric quantity, so the problem that the closure of a main throttle valve of a steam turbine cannot be timely distinguished by relying on existing tripping criteria is solved, various load shedding processes such as ...

Winder with spring-fixed creel spindles

The invention relates to a denim yarn winder, in particular to a winder with spring-fixed creel spindles. The winder with spring-fixed creel spindles comprises a servo motor, a creel, and rotor spinning creel spindles on the creel. The creel is provided with at least three beams. Spools synchronously controlled by the servo motor are disposed at the tops of the rotor spinning creel spindles. A spring is disposed at the bottom of each rotor spinning creel spindle and is connected to the corresponding beam of the creel. The denim yarn spools are synchronized by the servo motor, winder tension is lowered, and damage of the denim yarn spools is decreased. By the use of the rotor spinning creel spindles, spool tension is decreased, package is increased, efficiency of unwinding yarns is increased, end breakage rate is decreased and weaving efficiency is improved.

Indigo knitted thickened jean

The invention relates to the technical field of the clothes fabric, in particular to indigo knitted thickened jean, and the jean is of a two-layer structure comprising a surface layer and a bottom layer, wherein the surface layer is formed by weft knitting of indigo pure cotton yarns and high-conductivity wet polyester yarns, the bottom layer is a poly spun velour layer formed by napping, ironing and cutting the back surface of the surface layer. The indigo knitted thickened jean has the beneficial effects that the poly spun velour is added in the inner layer, so that the heat preservation performance is improved; and four pipeline specially-shaped polyester fibers Coolmax are adopted, so that good ventilation can be guaranteed while the thickness of the jean is increased, and the indigo knitted thickened jean can meet the climate changing requirement.

Charging alarming method and alarming device of automatic throw-in equipment of emergency power supply

The invention provides a charging alarming method and an alarming device of an automatic throw-in equipment of an emergency power supply. When the automatic throw-in equipment of the emergency power supply is charged, a charging mark is detected; when the charging mark cannot be detected, an automatic throw-in allowing mark is detected, if the automatic throw-in allowing mark is successfully detected, whether a first preset time is exceeded is judged, and if the first preset time is exceeded, an alarming signal is given out. The problem of hidden danger of the automatic throw-in equipment of the emergency power supply is solved, and reliability is improved.

Method for manufacturing oversize printed circuit board (PCB) back plate inner layer

The invention discloses a method for manufacturing an oversize printed circuit board back plate inner layer. Firstly, a PIN tack hole is drilled on an edge plate position of an inner layer cross-band veneer; secondly, a PIN tack film photographic plate is manufactured; thirdly, a PIN tack column is arranged in a corresponding position of the film photographic plate and the PIN tack hole; fourthly, the PIN tack column of the film photographic plate is correspondingly sleeved in the PIN tack hole of the inner layer cross-band veneer; fifthly, single-face exposure is conducted on the inner layer cross-band veneer; and finally, all steps are conducted on the other face of the inner layer cross-band veneer, and single-face exposure is conducted on the other face of the inner layer cross-band veneer. Compared with traditional book clamping mode exposure, according to the method, the PIN tack hole in the inner layer cross-band veneer and the PIN tack column of a film photographic plate are mutually ...

Electroless copper plating method for PCBs (printed circuit boards) with high aspect ratios

The invention discloses an electroless copper plating method for PCBs with high aspect ratios. According to the method, the intervals between adjacent PCBs with high aspect ratios are adjusted, and a plug board rack is enabled to swing in a an electroless copper plating potion in a direction perpendicular to the board surface, so that bubbles are discharged from holes in the PCBs with high aspect ratios; then electroless copper plating processes are performed twice on the PCBs with high aspect ratios, and total board electroplating flashing is performed on the PCBs after the primary electroless copper plating; accordingly, the thickness of copper on the hole wall is increased; and then the secondary total board plating is performed to thicken the copper. Compared with the prior art, the method effectively solves the problem that the circuit boards are scrapped due to copper absence in the holes caused by the fact that the bubbles in the holes cannot be cleared out or potion exchange in ...

Rear frame of beam dyeing machine

The invention relates to a beam dyeing machine, in particular to a rear frame of the beam dyeing machine. The rear frame of the beam dyeing has a double-layer yarn stand, yarn tubes and rollers. Lubricating grooves are arranged on both sides of the double-layer yarn stand, and yarn tube rods are arranged in the lubricating grooves. Rollers are arranged in the middle of the double-layer yarn stand, and a lubricating roller is hung at the top of the double-layer yarn stand. The rear frame with the double-layer yarn stand is small in floor occupation and then has effect equivalent to those of two dyeing frames, continuous production is allowed, loss of raw yarns is reduced, labor is saved, dyeing production efficiency is increased, and meanwhile energy consumption is correspondingly reduced. Besides, by the adoption of the rollers and the lubricating rollers on the dyeing machine, tensile force of the dyeing frame becomes controllable, while the tensile force is decreased, and the tensile ...

High density interconnect (HDI) plate with mechanic back drilling structure and manufacturing method thereof

The invention further provides a high density interconnect (HDI) plate with a mechanic back drilling structure and a manufacturing method thereof. The method comprises that: S1: a first copper foil layer, a first core plate, a second core plate and a sixth copper foil layer are correspondingly subjected to laminating together; S2: the first copper foil layer is subjected to mechanic back drilling processing with the drilling depth reaching a third copper foil layer, and the first copper foil layer, the second copper foil layer and the third copper foil layer are correspondingly connected; S3: the sixth copper foil layer is subjected to the mechanic back drilling processing with the drilling depth reaching a fourth copper foil layer, and the sixth copper foil layer, a fifth copper foil layer and the fourth copper foil layer are correspondingly connected. By adopting a manufacturing way that two core plates are firstly subjected to the laminating one time and then are subjected to the mechanic ...

Poly-lactic-co-glycolic acid-polylysine-polyethylene glycol-tetrandrine and daunorubicin copolymer nanoparticles as well as preparation method and application thereof

The invention discloses poly-lactic-co-glycolic acid-polylysine-polyethylene glycol-tetrandrine and daunorubicin copolymer nanoparticles as well as preparation method and application thereof. The method comprises the following steps of: dissolving a copolymer in an organic solvent (O), forming an oil-phase polymer, dissolving a medicine in an aqueous phase (W1), slowly adding the aqueous phase into the oil phase until primary emulsion (W1/O) is formed, rapidly adding the prepared primary emulsion into another aqueous phase (W2), performing multiple emulsion to form multiple emulsion (W1/O/W2), drying the nanoparticles subjected to multiple emulsion in an organic phase, centrifuging the solution through a high-speed refrigerated centrifuge, spinning the precipitate by using water, repeatedly operating twice, and preparing the PLGA-b-PLL-g-PEG coated tetrandrine and daunorubicin copolymer nanoparticles. The copolymer nanoparticle carrier is easy and convenient in preparation method, a medicine ...

Reactive power compensation device control method for preventing large-scale chain offline of wind generation sets

The invention discloses a reactive power compensation device control method for preventing large-scale chain offline of wind generation sets and belongs to the technical field of wind power generation. The reactive power compensation device control method comprises the following steps: a low-voltage running limit of reactive power compensation devices is set and when the voltage of a grid connection point is lower than the low-voltage running limit, that a power grid fault occurs is judged, and a grid connection switch is automatically disconnected; after the fault is removed, input commands are issued to part of the reactive power compensation devices by a system control center according to the network operation state to ensure that the voltage rapidly returns to the standard value. Through the adoption of the method, the fault of a wind power system can be effectively prevented from being expanded and the chain faults are prevented.

Chain tongs structure of thin film stretching production line

The invention provides a chain tongs structure of a thin film stretching production line. The inner and outer sides, containing a guide rail, of a tongs body are respectively and fixedly provided with one or two upper side bearings, outer rings of which are tangent with the side face of the guide rail, and the tongs body is further provided with a top bearing, an outer ring of which is tangent with the top face of the guide rail; corresponding lower side bearings are respectively mounted below the upper side bearings and on the inner and outer sides of the bottom of the tongs body; a tooth groove is formed in a film clamping face of a tongs handle; the tongs body is divided into a supporting base and an upper tongs body above the supporting base, and the supporting base and the upper tongs body are fixedly connected with each other through positioning pins and long screws; a tongs handle is mounted on the upper tongs body; the upper side bearings and the top bearing are fixedly mounted ...

Preparation method of three-dimensional micrometer level porous copper thin film

A preparation method of a three-dimensional micrometer level porous copper thin film comprises: a metal substrate is offered and serves as a negative electrode and a red copper sheet is offered and serves as a positive electrode; electroplating liquid is prepared, the content of Cu2+ in the electroplating liquid is 0.08mol/L to 0.2mol/L, the content of H2SO4 is 1.50mol/L to 3.00mol/L, the total content of a surface active agent is 0.5 mmol/L to 4.0mmol/L and the content of Cl- is 1.5mmol/L to 3.0mmol/L; and the three-dimensional porous copper thin film is formed on the metal substrate by using the electroplating liquid, the negative electrode and the positive electrode and adoption of a hydrogen bubble dynamic formwork electrodeposition method. The three-dimensional micrometer level porous copper thin film manufactured through the preparation method is even and small in hole diameter and high in porosity.

Real-time control strategy checking method of safety stability control device

The invention discloses a real-time control strategy checking method of a safety stability control device, which is used for ensuring the safe and reliable running of a power grid. The real-time control strategy checking method mainly comprises the following steps: selecting a corresponding control strategy table based on the current running mode of the power grid; supposing that the current time is as a fault time, determining the running state of the power grid before s fault occurs; supposing that all faults in the strategy table occur one by one according to the control strategy table; searching the control strategy from the control strategy table according to the supposed fault and the corresponding running state of the power grid before the fault occurs; judging the strategy based on the limiting condition and then determining an actual controllable object; comparing the total control quantity with the control strategy; displaying the control object under the supposed fault and the ...

Spare-power automatic switching implementation method of lines under wiring and operating modes of self-adaptive 330kV substation

The invention discloses a spare-power automatic switching implementation method of lines under wiring and operating modes of a self-adaptive 330kV substation and belongs to the technical field of power systems and automation. The spare-power automatic switching implementation method disclosed by the invention has the advantages that before the line spare-power automatic switching implementation is switched on, a switch at the mediate-low-voltage side of a transformer is firstly inter-tripped, and after the spare-power automatic switching charges for a main transformer successfully, the switch at the medium-low-voltage side is switched in a step-by-step manner and a time-delay manner, so that the influence of direct-switching spare supply lines on protection to the main transformer and stress damage to a transformer body is reduced; the ratio between the cross-section power of main supply lines and the heat stability power of the spare supply lines before breakdown is utilized to intelligently ...

Magnetic control opening and closing clamp device of film stretching production line transverse tensile machine

The invention discloses a magnetic control opening and closing clamp device of a film stretching production line transverse tensile machine. The magnetic control opening and closing clamp device is characterized in that closing clamp and opening clamp magnet mounting plates are close to the inlet and outlet of the transverse tensile machine, are respectively fixedly arranged above the outer side of a chain tong and are arranged on a rack, and the two mounting plates are respectively fixedly provided with multiple magnets which are arranged into a row; the magnets arranged on the closing clamp and opening clamp magnet mounting plates are gradually decreased or increased according to the advancing direction of the chain tong on guide rails, the descending and rising heights of handle ends of tong handles in the closing clamp and opening clamp process, and the magnets and the handle ends of the tong handles can keep gaps; the outward end surfaces of the handle ends of the tong handles are ...

Pressing method for sandwich aluminum-base printed circuit board

The invention discloses a pressing method for a sandwich aluminum-base printed circuit board. The pressing method comprises the following steps of: S1, drilling a through hole in an aluminum substrate and filling the through hole with resin; S2, performing wire drawing treatment on upper and lower surfaces of the aluminum substrate to form wavelike circuits; S3, attaching semi-cured sheets to the upper and lower surfaces of the aluminum substrate and then covering the semi-cured sheets with a copper foil layer; and S4, pressing the aluminum substrate to which the semi-cured sheets are attached and which is covered by the copper foil layers to prepare the sandwich aluminum-base printed circuit board. According to the pressing method, the wire drawing treatment is performed on the upper and lower surfaces of the aluminum substrate to enhance the binding force of the semi-cured sheets and the upper and lower surfaces of the aluminum substrate; temperature and pressure in a pressing process ...

Preparation method of three-dimensional porous nickel film

The invention relates to a preparation method of a three-dimensional porous nickel film. The preparation method comprises the following steps of: providing a red copper sheet as a cathode and a nickel sheet as an anode; preparing electroplate liquid, wherein the NiSO4 content in the electroplate liquid is 1.0-2.0mol/L, the H2SO4 content is 0.1-0.3mol/L, the H3BO3 content is 0.8-1.0mol/L, the NH4Cl content is 1.0-2.0mol/L, and the total content of a surfactant is 0.7-1.4g/L; and forming the three-dimensional porous nickel film on the red copper sheet by using the electroplate liquid, the cathode and the anode and adopting a hydrogen bubble dynamic template electrodeposition process. The porous nickel film prepared by the preparation method is uniform in bore diameter, high in porosity and good in stability.

Overload control method suitable for large-scale wind power centralized access

The invention discloses an overload control method suitable for large-scale wind power centralized access, belonging to the field of power system security and stability control. The overload control method aims at a regional power grid with large-scale wind power centralized access; when a wind power send-out circuit has overload, an overload cut-off measure can select the cut-off object in a way of dynamic optimization by analyzing the output force change trends of all wind power plants related to the circuit with overload, and has two dealing methods according to the possible conditions. The overload control method enables the cut-off measure to be more effective, and reduces the probability of overload recurrence of the wind power send-out circuit.

Knitted denim fixing method

The invention relates to the technical field of textile manufacturing, and especially relates to a knitted denim fixing method. The method comprises the following steps: conveying a knitted denim by a denim charging mechanism, and allowing the knitted denim to go through a denim guide roll having a narrow groove and used for preventing the knitted denim from crimping in the conveying process; allowing the knitted denim conveyed through the denim guide roll to reach a penetration water tank and the knitted denim to fully penetrate in water and absorb water until the water content of the knitted denim is 60-80%; rectifying the deflection of the weft filaments of the penetrated knitted denim through a weft adjusting device; and adjusting the knitted denim speed, fixing the knitted denim through a fixing oven, cooling, and finally doffing. The addition of the penetration water tank to a fixing machine in the invention makes the knitted denim fully penetrate in water and absorb water to guarantee ...

Single matrix white phosphor and preparation method thereof

The invention provides single matrix white phosphor and a preparation method thereof. The chemical expression of the phosphor is (SryBa1-x-y)(MgmZn1-m-p-q)2(PO4)2:xEu,pMn,qTb, wherein x is greater than 0 and less than 0.1; y is greater than 0 and less than 1; m is greater than 0 and less than 1; p is greater than 0 and less than 0.1; and q is greater than 0 and less than 0.1. The phosphor prepared by the method is fine and uniform in granules, can emit red, green and blue bands after being excited by 350-410nm near ultraviolet and can be used for the white LED excited by the near ultraviolet.

Self-propelled type temporary support and anchor support machine for coal mine roadway

The invention provides a self-propelled type temporary support and anchor support machine for a coal mine roadway. The self-propelled type temporary support and anchor support machine for the coal mine roadway is mainly composed of a walking support module, a supporting cross beam module, a lead shield beam module, an anchor drilling machine module and a drilling machine walking module. The walking support module mainly comprises two walking supports which are parallel. The supporting transverse beam module comprises a main transverse beam and two auxiliary transverse beams; the main transverse beam and the auxiliary transverse beams are fixedly connected with the walking support module through bolts. The lead shield beam module comprises a lead shield beam and a hydraulic oil cylinder, the lead shield beam and the hydraulic oil cylinder are hinged through a pin shaft, and the lead shield beam module is connected with the main transverse beam through a pin shaft. The anchor drilling machine ...

Intelligent electric system control device and implementation method thereof

The invention provides an intelligent electric system control device and an implementation method thereof. The device comprises a standby power automatic switching unit, a stable control unit and a standby power automatic switching and stable control matched unit. The stable control unit, a standby power automatic switching and stable control matched unit and the standby power automatic switching unit are connected sequentially, and the standby power automatic switching unit is further connected with the stable control unit. The standby power automatic switching and stable control matched unit is used for monitoring the stable control unit in real time and judging whether the stable control unit has stable control actions or not, and the standby power automatic switching function is locked if yes. By means of the intelligent electric system control device and the implementation method thereof, matching of the standby power automatic switching function with the stable control function is ...

Preparation method of oxygen and chlorine co-doped graphene quantum dots

The invention discloses a preparation method of oxygen and chlorine co-doped graphene quantum dots, and relates to hydro-thermal preparation technology of the oxygen and chlorine co-doped graphene quantum dots. The hydro-thermal preparation technology of the oxygen and chlorine co-doped graphene quantum dots is characterized in that: under hydro-thermal conditions and hydrochloric acid catalysis conditions, a saccharide is used as a carbon source and an oxygen doping source, hydrochloric acid is used as a chlorine doping source, and water-soluble oxygen and chlorine co-doped graphene quantum dots are produced by water molecule-eliminating polymerization of saccharide molecules and the hydrochloric acid. The hydro-thermal preparation technology relates to simultaneous introduction of elements of oxygen and chlorine into the graphene quantum dots, so that electron transition effective energy levels in the graphene quantum dots can be increased, and furthermore the prepared oxygen and chlorine ...

Identification and analysis system for jewelry jade and rock minerals

The invention provides an identification and analysis system for jewelry jade and rock minerals. The identification and analysis system comprises a detection system, a spectrum analysis system, a database and a result display system, wherein jewelry jade to be detected is detected by the detection system so as to obtain detection data, then the detection data flows to the spectrum analysis system, comparison is carried out by the spectrum analysis system to obtain a result, and then the result is transmitted to the result display system; the detection system is an infrared spectrometer; the spectrum analysis system comprises 400-1500 cm<-1> fingerprint region analysis, 150-4000 cm<-1> group frequency region analysis and near-infrared region 4000-7500 cm<-1> analysis. The system provided by the invention has the advantages that testing wave bands and testing methods (transmission method, reflection method and compression method) are expanded in the transverse direction, a data spectrogram ...

NM500 high-strength wear-resistant steel plate and heat treatment technique thereof

The invention relates to the field of manufacturing of high-strength wear-resistant steel plates, and discloses an NM500 high-strength wear-resistant steel plate and a heat treatment technique thereof. The NM500 high-strength wear-resistant steel plate comprises the following chemical components in percentage by mass: 0.25-0.28% of C, 0.80-1.20% of Mn, 0.20-0.40% of Si, at most 0.010% of S, at most 0.020% of P, 0.45-0.70% of Cr, 0.10-0.30% of Mo, 0.010-0.030% of Ti, 0.0010-0.0030% of B, 0.015-0.045% of Als, 0.015-0.050% of Nb, and the balance of Fe and inevitable impurities. The heat treatment technique is implemented in a way that: the quenching holding temperature is 830-880 DEG C, and the holding time is 1.2H-2.0Hmin (H is plate thickness and the unit is mm). By using the low-cost component design and sub-temperature heat treatment technique, the invention effectively saves the energy, and lowers the production cost; and the produced NM500 high-strength wear-resistant steel plate has ...

Titanium microalloying hot-rolling thick steel plate with low yield ratio and high strength and production process of steel plate

The invention discloses a titanium microalloying hot-rolling thick steel plate with low yield ratio and high strength and a production process of steel plate. The titanium microalloying hot-rolling thick steel plate comprises the chemical components in percentage by weight: 0.15-0.18 percent of C, 0.20-0.40 of Si, 0.50-0.80 percent of Mn, less than or equal to 0.020 percent of P, less than or equal to 0.010 percent of S, 0.060-0.080 percent of Ti, 0.010-0.030 percent of Als, less than or equal to 0.35 of carbon equivalent value (CEV percentage). The production process comprises the following steps of: 1) melting and carrying out continuous casting: melting molten steel and casting the molten steel into blanks according to set components; 2) rolling: in the rolling process, heating temperature of casting blanks is controlled between 1,220-1,270 DEG C, the temperature preservation time is more than or equal to 180 minutes, the rolling temperature in a recrystalline region is more than or ...

Moisture and sweat absorption double-side peached-finish towel and manufacturing process thereof

The invention relates to the technical field of towels, in particular to a moisture and sweat absorption double-side peached-finish towel and a manufacturing process thereof. The moisture and sweat absorption double-side peached-finish towel comprises superfine fiber connecting yarns, an upper surface yarn layer and a lower bottom yarn layer and has a double-layer structure, the superfine fiber connecting yarns, the upper surface yarn layer and the lower bottom yarn layer are interwoven to form a plurality of texture structure units, the upper surface yarn layer is formed by weft knitting of inner filaments and outer filaments, and the lower bottom yarn layer is Cool max fibers. The manufacturing process of the moisture and sweat absorption double-side peached-finish towel includes: knitting 40D (denier) polyester peach skin-superfine fiber yarns and 32S cotton yarns regularly by a weft knitting machine to form the upper surface yarn layer having plain weaving structure, knitting the superfine ...

Hydrocracking process method

The invention relates to a hydrocracking process method. A steam stripping section at the lower part of the interior of a fractionating tower and a wall hanging tower are arranged side by side, hydrogenated generated oil stripping steam is introduced into the lower part of the fractionating tower, and unconverted oil is led out from the bottom of the fractionating tower; a part of the unconverted oil is used as recycling unconverted oil, and the other part is used as a wall hanging tower unconverted oil feedstock; unconverted oil stripping steam is introduced into the lower part of the wall hanging tower, the wall hanging tower unconverted oil feedstock is introduced into the upper part of the wall hanging tower, a wall hanging tower discharged gas phase material and fractionating tower stripping steam are together introduced into the fractionating tower, and a wall hanging tower unconverted oil stripping residual liquid is discharged from the device and is used as a feedstock of a catalytic ...

D,L-alpha-ketoisovaline calcium dihydrate crystals and preparation method thereof

The invention discloses D,L-alpha-ketoisovaline calcium dihydrate crystals and a preparation method of the crystals. Particles of D,L-alpha-ketoisovaline calcium are difficult in filtration and production separation due to fineness and smoothness; the liquidity of D,L-alpha-ketoisovaline calcium is small, and the mixing difficulty is big in the production of a preparation; and the D,L-alpha-ketoisovaline calcium tablets have low solubility and poorer stability than that of a hydrate of D,L-alpha-ketoisovaline calcium. The invention provides D,L-alpha-ketoisovaline calcium dihydrate crystals which are dihydrate crystals of a compound shown in a chemical formula (I), the powder X-ray diffraction spectrum expressed with 2theta diffraction angle of the D,L-alpha-ketoisovaline calcium dihydrate crystals has diffraction peaks shown in Figure 1. The D,L-alpha-ketoisovaline calcium dihydrate crystals are high in stability, solubility and dissolution rate, and have the advantages in the preparation ...

Quickly-nested PCR (polymerase chain reaction) malaria molecular diagnosis reagent kit and detection method

The invention discloses a quickly-nested PCR (polymerase chain reaction) malaria molecular diagnosis reagent kit and a detection method. The quickly-nested PCR malaria molecular diagnosis reagent kit comprises novel primers with a self-closing function, cytochrome oxidase genes (cox1) in a plasmodium mitochondrial genome serve as target genes, and four bidirectional semi-nested primers are designed in loxp sites of plasmodium groups and species to form a pair of group-specific primers and two species-specific primers. A traditional nested/multiplex PCR complicated in reagents and burdensome in operation is simplified to single-reagent and single-tube one-step reaction, separate infection or mixed infection of malignant malaria and plasmodium vivax and separate infection of quartan malaria and ovale malaria can be detected and authenticated simultaneously, sensitivity and specificity of the detection method are superior to a microscopic examination method, and the level of detection of one ...

Photovoltaic active control method of concentration output of large-scale wind power plants and photovoltaic power stations

The invention discloses a photovoltaic active control method of concentration output of large-scale wind power plants and photovoltaic power stations, and belongs to the technical field of electric power systems and automation thereof. According to the photovoltaic active control method, an output plan of various photovoltaic power stations is calculated according to limitation, for the output section, of a current dispatching mode and an operation type of a power grid, and according to a current plan and real-time output of the wind power plants. The photovoltaic active control method can guarantee the fact that the power grid can stably and reliably operate in various operation types and various fault conditions, and meanwhile improves transmission ability of the power grid to the maximum. When wind power and photoelectric power share an output channel, by means of coordination control of output of the wind power plants and the photovoltaic power stations, wind sources and photoelectric ...

Electrolytic polishing solution for aluminum or aluminum alloy and electrolytic polishing method

An electrolytic polishing solution for aluminum or aluminum alloy and an electrolytic polishing method. The electrolytic polishing solution comprises 18%-48% of H2SO4, 20%-43% of H3PO4, 5%-20% of PEG, 6%-18% of C4O6H4KNa and the balance of water. The electrolytic polishing solution provided by the invention contains no nitric acid or chromic acid, and is favorable for environmental protection. The polishing solution has obvious advantages in quality and price compared with other polishing solutions. Due to flexible ratio, the polishing solution has good industrial operability. The electrolytic polishing solution is especially suitable for electrochemical polishing on hard aluminum alloy workpiece requiring high surface quality, and endows full gloss (high brightness of the polished workpiece) on the surface of aluminum or alloy thereof, while smoothening the surface at the same time. Besides, the electrolytic polishing solution has certain leveling effect on the workpieces without mechanical ...

Method for preparing nano-copper cubic particles

The invention discloses a method for preparing nano-copper cubic particles. The method comprises the following steps: providing a metal substrate to serve as a cathode, and providing a red copper sheet to serve as an anode; preparing an electroplating solution, wherein Cu2+ content in the electroplating solution is 0.02-0.10mol/L, the content of organic weak acid is 0.2-0.4mol/L, the surfactant content is 1-4 percent of total mass of the electroplating solution, and a pH value of the electroplating solution is 5.0-7.5; and preparing the nano-copper cubic particles on the metal substrate by employing an electrodeposition method by utilizing the electroplating solution, the cathode and the anode. The nano-copper cube prepared according to the method is high in purity, regular in shape, uniform in particle size and excellent in oxidation resistance.

Anti-yarn-separation wax disc

The invention relates to the technical field of members of a barrel manufacturing trolley, in particular to an anti-yarn-separation wax disc. The anti-yarn-separation wax disc comprises a wax disc support, a wax column, a wax disc and an installing frame, wherein the wax column is arranged at the center on the wax disc support; the wax disc is sheathed on the wax column which is fixedly arranged on the installing frame by a fixed shaft; and a supporting plate with a blocking edge is arranged under the wax disc support. The anti-yarn-separation wax disc has the beneficial effect that since the blocking edge is arranged at the periphery of the wax disc, yarns are prevented from being separated from a track and being clamped in the machine to stop the operation procedure, so that smooth production is ensured and the production efficiency and the quality are improved.

Online comprehensive detection system for oil

The invention discloses an online comprehensive detection system for oil, which mainly comprises a host cabinet and a detection platform, wherein a motor, a speed reducer, an oil pump, an oil pollution degree online detector, a ventilation and heat dissipation board, a circuit control board, a printer, an industrial tablet computer, an oil inlet tube, a connection oil tube and an oil return tube are mounted in the host cabinet; an oil moisture detector, an oil open-up flash point detector and an oil closed-up flash point detector are mounted on the detection platform. The system integrates multiple oil property detectors, has the advantages of intensive dimension as well as high efficiency and convenience in operation, and can acquire property information of the oil more quickly and systematically as compared with the system adopting the traditional oil detection method; the efficiency of recognizing the working state of the systematic oil can be improved, the oil information can be input ...

Reactive voltage emergency control method in concentrated grid connecting area of wind power plant

The invention discloses a reactive voltage emergency control method in a concentrated grid connecting area of a wind power plant, which belongs to the technical field and comprises the steps of electric information collecting, on-site voltage situation judging, sub-area comprehensive voltage situation judging, area coordinating control decision, a reactive support capacity list, an electric related list, area concentrating control and on-site control. The on-site voltage situation judging is used for accelerating the action speed of on-site control, and an area concentrating control center judges the reactive supply-need condition and voltage changing tendency of an area according to a comprehensive voltage situation to select an appropriate control strategy, defines an effective reactive support node range according to the electric related list, and performs dynamic sequencing on the dynamic reactive support capacity of each reactive source in the effective range according to the reactive ...

Floating roll device for film production device

The invention relates to a floating roll device for a film production device. Two ends of a floating roll are respectively rotatably connected with a rotating arm, the middle of the left rotating arm and the middle of the right rotating arm are respectively hinged to a piston rod of a cylinder, and a cylinder barrel of the cylinder is connected to a wallboard. The two rotating arms are fixedly connected with a rotating rod, and two ends of the rotating rod are rotatably installed on the wallboard. One end of the rotating rod is connected with a position detection mechanism angle encoder, and an encoder signal line is connected with a winding drum transmission motor control mechanism. A film is downward from a front guide roll, bypasses the lower portion of the floating roll and is upward to be wound on a winding drum through a rear guide roll. Counter weight blocks are installed at far ends of the rotating arms relative to the floating roll. Tensile force of the film acting on the floating ...

Method for solving accurate selecting and changing of generator and load after regional power grid splitting

The invention discloses a method for solving accurate selecting and changing of a generator and a load after regional power grid splitting, and belongs to the technical field of power system and automation. According to the method provided by the invention, the generator and the load can be recognized according to the frequency of the generator and the load, so as to accurately recognize the parts where the generator and the load are located. By adopting the method provided by the invention, the effect of accurate selecting of the need cutting generator and the load is realized, effective control measure of a security emergency control device is guaranteed powerfully, and the power distribution reliability is improved.

5-millimeter steel plate rolling process

The invention relates to a metallurgical industrial plate rolling process and discloses a 5-millimeter steel plate rolling process. In the 5-millimeter steel plate rolling process, the matching of a tapping temperature, a finish rolling temperature, a blank thickness, a rolling pass, a rolling force, an interpass rolling force adaption coefficient, a relative convexity, a rollgang linear velocity and a rolling mill work roll linear velocity of a blank is correspondingly set. The 5-millimeter steel plate rolling process solves various problems such as waves, buckling, cambering, scratching of a frame and misroll which usually occur when an existing medium plate rolling mill is tested to roll a thin wide steel plate with the thickness of less than or equal to 7 mm; the rolling process is stable; and high-quality and qualified products can be produced in batch.

Stepped slot lateral side evenness improving method

The invention discloses a stepped slot lateral side evenness improving method. A polytetrafluoroethylene gasket with the same depth of the stepped slot is correspondingly filled in a core board window; and a gap smaller than 0.1mm is reserved between the outer side of the polytetrafluoroethylene gasket and the inner side frame of the core board window. When the core board is compressed, glue spills from a no-flow prepreg under pressures to a corresponding window area; as blocked by the polytetrafluoroethylene gasket, the glue spilling with a small quantity can only enter the gap between the outer side of the polytetrafluoroethylene gasket and the inner side frame of the core board window; and since the gap is smaller than 0.1mm, the quantity of the glue spilling can be limited in a range of +/-0.1mm. Afterwards, the glue spilling can be eliminated by a plasma glue stripper, so that the evenness of the stepped slot inner lateral side is effectively guaranteed.

Ball warp beaming machine

The invention relates to the field of textile technology, in particular to a ball warp beaming machine which comprises a bobbin creel and a beaming machine head. The bobbin creel is divided into a front section, a middle section and a rear section, each section of the bobbin creel is provided with bobbin brackets, bobbins are uniformly arranged on the bobbin brackets, a sensing device is arranged beside each bobbin, a pivot device used for collecting output signals of the corresponding sensing device is further arranged on each section of the bobbin creel, a control device for processing signals in the pivot devices is arranged at the head of the bobbin creel, an expansion reed, a yarn guide roller and a warp beam are sequentially placed at the front of the bobbin creel, yarns on the bobbins pass through the expansion reed, the yarn guide roller and the warp beam after being unwound, a silicon-controlled direct-current speed regulating motor and a hydraulic variable-speed oil motor are ...

Method and device for filtering mails

The invention discloses a method and a device for filtering mails. The method includes determining to-be-tested mails; searching historical sending records; and determining the to-be-tested mails to be normal mails if sending records which take receivers of the to-be-tested mails as senders and take senders of the to-be-tested mails as receivers are included in the historical sending records. According to the technical scheme, the historical sending records are searched according to the determined to-be-tested mails, and the to-be-tested mails are determined to be normal mails if the sending records which take the receivers of the to-be-tested mails as the senders and take the senders of the to-be-tested mails as the receivers are included in the historical sending records. The to-be-tested mails are detected to be normal or not, so that misjudgment rate of junk mails is reduced, and reliability of mail filtering is improved effectively.

Denim yarn rotor-spinning bobbin making machine

The invention relates to a denim yarn bobbin making machine, in particular to a denim yarn rotor-spinning bobbin making machine. The denim yarn rotor-spinning bobbin making machine comprises a servo motor, rotor spinning frames and high-speed self-rotating wax discs, wherein the rotor spinning frames are controlled by the servo motor, each of the rotor spinning frames is connected with a transverse rod via bolts, holding seats for holding the high-speed self-rotating wax discs are arranged on the transverse rods, each high-speed self-rotating wax disc comprises a wax disc seat, a bearing and a wax block, cylindrical grooves for holding the bearings are reserved at the bottom of the wax disc seats, and vertical rods for holding the wax blocks are arranged on the upper portions of the wax disc seats. Due to arrangement of high-speed bearing wax discs, waxed wax can be more uniform and less in tensile force and denim yarn bobbin making efficiency is improved. Due to arrangement of the servo ...

Method for preparing C/SiC composite material through low-cost fused silicon impregnation method

The invention relates to a method for preparing a C/SiC composite material through a low-cost fused silicon impregnation method, which comprises the following steps: performing calcining pretreatment on a carbon felt or graphite felt at 400-600 temperature; immersing the pretreated carbon felt or graphite felt in a melamine and boric acid solution, thus coating a boron nitride protective layer; immersing in a carbon/silicon carbide slurry water solution, performing impregnation to ensure that pores of the carbon felt or graphite felt are fully filled with carbon/silicon carbide, placing in a sintering furnace, and performing primary fused silicon impregnation treatment at 1600-1800 DEG C; immersing in liquid phenolic resin, and performing carbonization treatment under the protection of an inert atmosphere at 800-1000 DEG C to ensure that all the resin is carbonized; and finally, performing secondary fused silicon impregnation treatment to ensure that carbon produced by carbonization of ...

Knitted denim feed roller

The invention relates to the technical field of textile manufacture, in particular to a knitted denim feed roller. The knitted denim feed roller comprises a feed roller body, thin grooves are arranged on the outer circumferential surface of the feed roller body, an opening of each thin groove is 5-10 times of monofilament of knitted denim in size, the depth of each thin groove is 5-15 times of that of the monofilament of the knitted denim, and the interval between the adjacent thin grooves ranges from 2cm to 5cm. The knitted denim feed roller can be not only used as a knitted denim guide roller but also prevent edge curling during denim feeding, and is simple in structure, low in cost and widely applicable to the industry of textiles.

Realization method for configurable decision software of stability control device

The invention discloses a realization method for a configurable decision software of a stability control device, which comprises the following steps: the configurable decision software of the stability control device is disassembled into a plurality of entities in which data of decision tables and the search program of control strategies are thoroughly separated, management software is configured through a PC (Personal Computer) so as to configure the attributes of the entities and relationship among the entities so as to realize a stability control system with variable functions, thereby improving the universality and reliability of the decision engineering software.

Single matrix white phosphor for LED (light emitting diode) and preparation method thereof

The invention provides single matrix white phosphor for an LED (light emitting diode) and a preparation method thereof. The chemical expression of the phosphor is Na2.5Tb0.5Mg7(PO4)6:xEu,yMn, wherein x is greater than 0 and less than 0.1 and y is greater than 0 and less than 0.5. The phosphor prepared by the method is fine and uniform in granules, can emit red, green and blue bands after being excited by 350-410nm near ultraviolet and can be used for the white LED excited by the near ultraviolet.

Manufacturing method for embedded metal block of high-frequency mixed pressed circuit board

The invention belongs to the field of manufacturing of a printed circuit board and provides a manufacturing method for an embedded metal block of a high-frequency mixed pressed circuit board. The manufacturing method comprises a step of pressing and combining a high-frequency panel and a glass fiber panel into the high-frequency mixed pressed circuit board, wherein the high-frequency mixed pressed circuit board is provided with a first surface located on the side of the high-frequency panel and a second surface opposite to the first surface and located on the side of the glass fiber panel. The manufacturing method for the embedded metal block of the high-frequency mixed pressed circuit board further comprises the following steps: processing a blind slot; processing a splicing sheet; embedding a metal block; pre-splicing the metal block; and pressing and combining the metal block. According to the manufacturing method, the blind slot is processed on the glass fiber panel so as to embed the ...

Photovoltaic power station system with low voltage ride through and anti-islanding protection functions

The invention discloses a photovoltaic power station system with low voltage ride through and anti-islanding protection functions. The photovoltaic power station system comprises a photovoltaic power generation system array, a first breaker, a three-phase inverter, a filter, a parameter detecting module, a loader, a second breaker, a transformer, a power grid and a controller. The output current of the photovoltaic power generation system array sequentially passes through the first breaker, the three-phase inverter and the filter to be input into the input end of the parameter detecting module, one path of the parameter detecting module is connected with the loader, the other path of the parameter detecting module is connected with the power grid through the transformer and the second breaker, the parameter detecting module can detect switch signals of the second breaker and the voltage V and the frequency f of the coupled point between the parameter detecting module and the loader and ...

Sulfamide derivatives and preparation method and use thereof

The present invention discloses a compound shown in formula I or a stereoisomer, pharmaceutically acceptable salt, crystal form, solvate or isotopologue thereof. The compound of the present invention shows excellent inhibition activity against histone deacetylases, has remarkable inhibition effects on cancer cells, and provides a new choice of drugs used for the clinic treatment and diseases related to the abnormal activity of histone deacetylases.

Emergency accurate control method and system for large-scale interruptible loads

Provided is an emergency accurate control method and system for large-scale interruptible loads. The method includes: acquiring, by a region control master station, a sheddable load sequence table; acquiring, by the region control master station, a first to-be-shed load; performing, by the region control master station, minimum under-shedding matching layer by layer according to the first to-be-shed load, and shedding a sheddable load corresponding to control substation matching with the first to-be-shed load; and sending, by the region control master station, a second to-be-shed load to the corresponding control substation for load shedding if the second to-be-shed load exists.

LOAD SHEDDING SYSTEM, COMMUNICATION METHOD AND ACCESS APPARATUS THEREOF

Provided are an accurate load shedding system, and a communication method and an access apparatus thereof. The access apparatus includes: two E1 interfaces, eight optical fiber interfaces, a CPU and an FPGA. The two E1 interfaces are respectively connected to a control apparatus A and a control apparatus B of a control substation. The eight optical fiber interfaces are respectively connected to eight control terminals. The FPGA includes eight optical fiber transceivers respectively connected to the eight optical fiber interfaces through serial interfaces, and two E1 transceivers respectively connected to the two E1 interfaces through serial interfaces. Each optical fiber transceiver includes a reset submodule. Each E1 transceiver also includes a reset submodule. The CPU is connected to the FPGA through a parallel bus. 1. An access apparatus , comprising: two E1 interfaces , eight optical fiber interfaces , a central processing unit (CPU) and a field programmable gate array (FPGA) ,wherein one of the two E1 interfaces is connected to a control apparatus A of a control substation, and the other one of the two E1 interfaces is connected to a control apparatus B of the control substation;the eight optical fiber interfaces are respectively connected to eight control terminals;the FPGA comprises eight optical fiber transceivers and two E1 transceivers, wherein the eight optical fiber transceivers are respectively connected to the eight optical fiber interfaces through serial interfaces, the two E1 transceivers are respectively connected to the two E1 interfaces through serial interfaces, each of the eight optical fiber transceivers includes a reset submodule, and each of the two E1 transceivers includes a reset submodule;the CPU is connected to the FPGA through a parallel bus; andwherein the FPGA further comprises a watchdog module connected to the CPU;the watchdog module is configured to reset the access apparatus in response to determining that the CPU fails; andthe CPU ...

Accurate load shedding system and method based on a power-dedicated wireless network

Provided is an accurate load shedding system and method based on a power-dedicated wireless network. The system includes: a control master station layer, a control substation layer and a terminal user access layer. The control master station layer includes a control master station apparatus and an optical/E1 conversion device. The control substation layer includes an optical/E1 conversion device, a control substation apparatus and a wireless access device. The terminal user access layer includes a wireless core network, a base station and a control terminal. The wireless access device is connected to the wireless core network through Ethernet. The wireless core network is connected with the base station through an optical fiber. The control terminal is connected to a wireless network of the base station through customer premise equipment (CPE).

Smart Outlet System with Fast Frequency Tracking for Power System Frequency Control Using Distributed Appliances

Systems and methods are disclosed to control the power grid frequency by capturing the frequency change using an extended Kalman filter method with the distributed smart outlet devices at the low-voltage distribution level; and locally control the relay that provides power to the appliance by comparing the captured frequency with the threshold sent from the cloud control center.

Adaptive Method for Aggregation of Distributed Loads to Provide Emergency Frequency Support

Systems and methods are disclosed for power management by estimating power contingency of a grid at a cloud control center; performing decentralized real-time measurement and making local decisions at one more computer controlled outlets connected to the grid; and aggregating distributed loads to provide emergency frequency support to the grid. 1. A method for power management , comprising:estimating power contingency of a grid at a cloud control center;performing decentralized real-time measurement and making local decisions at one more locally/remotely controlled outlets connected to the grid; andaggregating distributed loads to provide emergency frequency support to the grid.2. The method of claim 1 , wherein in the cloud control center claim 1 , performing decision-making for frequency control by determining one or more flexible loads to shed based on the power system state claim 1 , total amount of flexible loads claim 1 , importance of the flexible loads claim 1 , and possible contingencies.3. The method of claim 1 , wherein in the cloud control center claim 1 , performing decision-making for frequency control by analyzing switching-off conditions of the computer controlled outlets and send the conditions to the computer controlled outlets.4. The method of claim 1 , comprising continuously measuring a frequency of the grid at the locally/remotely controlled outlets.5. The method of claim 4 , comprising switching off one or more appliances when switching-off conditions are satisfied claim 4 , or when switching-off commands sent from the cloud control center.6. The method of claim 1 , wherein the locally/remotely controlled outlets measure voltage claim 1 , current claim 1 , active power claim 1 , reactive power claim 1 , frequency claim 1 , rate of frequency change (ROFC) claim 1 , and switch status one or more plugged-in appliances in real-time continuously.7. The method of claim 1 , wherein the control center aggregates the locally/remotely controlled outlets ...

Sulfonamide derivative and method of preparation and use thereof

La presente invención revela un compuesto que se muestra en la fórmula I o un estereoisómero, sal farmacéuticamente aceptable, forma de cristal, solvatado o isotopólogo del mismo. El compuesto de la presente invención muestra una excelente actividad de inhibición contra las histonas desacetilasas, tiene efectos de inhibición notables en las células cancerosas y proporciona una nueva opción de medicamentos utilizados para el tratamiento clínico y las enfermedades relacionadas con la actividad anormal de las histonas desacetilasas. (Traducción automática con Google Translate, sin valor legal) The present invention discloses a compound shown in formula I or a stereoisomer, pharmaceutically acceptable salt, crystal form, solvate or isotopologue thereof. The compound of the present invention shows excellent inhibition activity against histone deacetylases, has remarkable inhibition effects on cancer cells, and provides a new drug option used for clinical treatment and diseases related to abnormal activity of histone deacetylases. . (Automatic translation with Google Translate, without legal value)

Preparation method and apparatus for methyl methacrylate

A method and apparatus for preparing methyl methacrylate (MMA) are provided. The method includes an aldol condensation reaction, a first distillation, a second distillation, a third distillation, a phase splitting, and a fourth distillation. Through the control of the process, the aldol condensation reaction can be performed when methyl propionate is used as the ninth material stream and formalin solution is used as the fifteenth stream material, MMA is obtained as the final product from the third material stream, and the waste with low content of residual formaldehyde is recovered from the eighth material stream.

Emergency accurate control method and system for large-scale interruptible loads

Provided is an emergency accurate control method and system for large-scale interruptible loads. The method includes: acquiring, by a region control master station, a sheddable load sequence table; acquiring, by the region control master station, a first to-be-shed load; performing, by the region control master station, minimum under-shedding matching layer by layer according to the first to-be-shed load, and shedding a sheddable load corresponding to control substation matching with the first to-be-shed load; and sending, by the region control master station, a second to-be-shed load to the corresponding control substation for load shedding if the second to-be-shed load exists.

Method and device for monitoring abnormality of direct-current circuit of converter

The invention provides a monitoring method and device for abnormal DC circuit of a converter. The monitoring method mentioned above comprising: determining the theoretical value of the total impedance of the DC circuit mentioned above; determining the input current, output current, and actual voltage of the DC circuit mentioned above at the current moment; calculating the theoretical value of the specific sub-frequency domain component of the DC voltage at the current moment based on the current difference between the input current and output current mentioned above and the theoretical value of the total impedance mentioned above; calculating the actual value of the specific sub-frequency domain component of the DC voltage based on the actual voltage mentioned above; and determining whether the DC circuit mentioned above is abnormal based on the theoretical value mentioned above and the actual value mentioned above. The invention also provides a monitoring device for abnormal DC circuit of a converter. According to the monitoring method and device provided by the invention, it is capable of achieving online warning of abnormal DC circuit parameters, thereby enabling real-time monitoring of the status of the DC circuit while the DC circuit is working normally, and timely detection of abnormal DC circuit parameters, thereby achieving abnormal online warning.

Diagnostic method and apparatus for shaft breakage fault of railway vehicle

The invention relates to a broken axle fault diagnosis technology of a rail vehicle, in particular to a diagnostic method and device for broken axle faults of a rail vehicle, and a computer-readable medium. The above-mentioned diagnostic method for broken axle faults of a rail vehicle can be used for diagnosing broken axle faults of a plurality of axles of the rail vehicle. The diagnostic method includes the steps: judging the operating condition of the rail vehicle; and in response to the rail vehicle being in the traction operating condition, using one of the plurality of axles as the axle to be tested to perform a first broken axle condition judgment. The first broken axle condition may include: the actual traction of the other axles except the one to be tested is all greater than the first traction threshold, while the actual traction of the axle to be tested has been continuously smaller than the second traction threshold and the axle speed has been continuously greater than the speed of the rail vehicle for up to the first time threshold. If the first broken axle condition is satisfied, it is judged that the axle to be tested is suspected of having a broken axle fault. The invention can be used to report faults quickly and accurately, so as to ensure the safe operation of trains.

A wearable fingertip force haptic feedback device

Mop

algoritmo para busca de tabela de estratégia ade-quada para dispositivo de controle de segurança e estabilidade

resumo patente de invenção: "algoritmo para busca de tabela de estratégia adequada para dispositivo de controle de segurança e estabilidade". a presente invenção refere-se a um algoritmo para busca de tabela de estratégia para um dispositivo de controle para segurança e estabilidade, e pertence ao campo técnico de automação de sistemas de energia elétrica. a presente invenção compreende as seguintes etapas: divisão de estratégia de tabela de estratégia de controle de estabilidade em cinco elementos básicos, isto é, modo de operação, elemento de falha, tipo de falha, modo de fluxo de energia, e medidas de controle; uso de uma estrutura de árvore para descrever e armazenar os cinco elementos de estratégia básicos da tabela de estratégia de controle de estabilidade; designação de valores de peso do nó de folha para a árvore de geração de tabela de estratégia de controle de estabilidade em sequência, seguido pelo cálculo dos valores de peso de nós diferentes dos nós de folha; construção da tabela hash de árvore de geração e tabela de estratégia de controle de estabilidade; e uso de algoritmo hash para buscar estratégia de controle de estabilidade. a presente invenção adota o algoritmo de busca que forma funções hash, cuja complexidade de tempo é o(1), assim melhorando grandemente a eficiência, aumentando a velocidade de busca de tabela de estratégia e velocidade de resposta de dispositivo, e melhorando o efeito de controle.

Diagnostic method and apparatus for shaft breakage fault of railway vehicle

A diagnostic method and apparatus for a shaft breakage fault of a railway vehicle. The diagnostic method for a shaft breakage fault of a railway vehicle can perform shaft breakage fault diagnosis on a plurality of axles of the railway vehicle. The diagnostic method comprises the following steps: determining an operating condition of the railway vehicle; in response to the fact that the railway vehicle is in a traction condition, taking an axle (241) in the plurality of axles (241-246) as an axle to be measured to determine a first shaft breakage condition, the first shaft breakage condition comprising that the actual traction of other axles than said axle is greater than a first traction threshold, the actual traction of said axle is continuously less than a second traction threshold, and the axle speed continuously greater than the railway vehicle speed reaches a first time threshold; and if the first shaft breakage condition is satisfied, determining that said axle is suspected to be broken. The diagnostic method for a shaft breakage fault can rapidly and accurately report a fault, so as to ensure the safe operation of the train. In addition, also provided are an apparatus for a shaft breakage fault of a railway vehicle and a computer readable medium.

Power supply mode determination method and apparatus, and transmission control system and electronic device

The present disclosure relates to a power supply mode determination method and apparatus, and a transmission control system and an electronic device. The method comprises: acquiring a sampling voltage signal of a power supply grid; determining, according to the sampling voltage signal, a parameter value of a specified parameter of electrical energy supplied by the power supply grid; and comparing the parameter value of the specified parameter of the electrical energy supplied by the power supply grid with a corresponding preset threshold value, and determining a power supply mode of the power supply grid according to a comparison result.

Diagnostic method and apparatus for shaft breakage fault of railway vehicle

Método de busca de tabela de estratégia adaptado a um dispositivo de controle de segurança e estabilidade.

método de busca de tabela de estratégia adaptado a um dispositivo de controle de segurança e estabilidade. a presente invenção refere-se a um algoritmo para busca de tabela de estratégia para um dispositivo de controle para segurança e estabilidade, e pertence ao campo técnico de automação de sistemas de energia elétrica. a presente invenção compreende as seguintes etapas: divisão de estratégia de tabela de estratégia de controle de estabilidade em cinco elementos básicos, isto é, modo de operação, elemento de falha, tipo de falha, modo de fluxo de energia, e medidas de controle; uso de uma estrutura de árvore para descrever e armazenar os cinco elementos de estratégia básicos da tabela de estratégia de controle de estabilidade; designação de valores de peso do nó de folha para a árvore de geração de tabela de estratégia de controle de estabilidade em sequência, seguido pelo cálculo dos valores de peso de nós diferentes dos nós de folha; construção da tabela hash de árvore de geração e tabela de estratégia de controle de estabilidade; e uso de algoritmo hash para buscar estratégia de controle de estabilidade. a presente invenção adota o algoritmo de busca que forma funções hash, cuja complexidade de tempo é o(1), assim melhorando grandemente a eficiência, aumentando a velocidade de busca de tabela de estratégia e velocidade de resposta de dispositivo, e melhorando o efeito de controle.

Method and device for monitoring abnormality of direct-current circuit of converter

Permanent magnet-based ship berthing method, berthing device and verification method