移动硬盘

Concentrated leakage prevention construction method for cofferdam

The invention relates to a construction method for preventing concentrated leakage of a cofferdam, and relates to the technical field of cofferdam construction. The method comprises the following steps: S1, establishing a measurement control point and a construction mark; s2, earthwork filling; s3, the composite geomembrane is laid on the upstream face to complete construction of the cofferdam body; s4, the cofferdam body is reinforced; and S5, an inverted filter layer is built on the downstream face side of the cofferdam body. The cofferdam has the effect that the stability of the cofferdam body can be improved.

Linear guide optical fiber near field release kinetic analysis method

The invention discloses a dynamic analysis method for near-field release of a wire guide optical fiber. The method comprises the following specific steps: 1) determining basic parameters of an optical fiber coil and an optical fiber structure; 2) determining near-field release parameters of the optical fiber; 3) determining optical fiber model information at an initial moment before release; 4) determining a motion track curve and a speed curve of the optical fiber release point; 5) establishing an optical fiber structure dynamic model; 6) solving the dynamic response of the current optical fiber structure; 7) judging whether the near-field release process of the optical fiber is finished or not; if the release process is finished, continuing to execute the step 8; if the release process is not finished, returning to the step 5, continuing to release the optical fiber unit, and performing dynamic modeling and solving on the optical fiber structure; and 8) outputting a dynamic response result ...

Alzheimer's disease classification method and system based on multi-mode hypergraph attention network

The invention provides an Alzheimer's disease classification method and system based on a multi-mode hypergraph attention network. The method comprises the following steps: acquiring sMRI image data of brains of a plurality of Alzheimer's disease patients and preprocessing the sMRI image data; performing feature extraction on the preprocessed sMRI image data, and constructing a plurality of cross-modal hypergraphs according to image features and morphological features of the brain region of the patient; establishing a hypergraph attention neural network model, training by using a cross-modal hypergraph, finally obtaining sMRI image data of the brain of a patient to be diagnosed, constructing corresponding hypergraphs, inputting the hypergraphs into the trained hypergraph attention neural network model for classification, and obtaining an Alzheimer's disease classification result and attention weights corresponding to the hypergraphs; the Alzheimer's disease classification method can effectively ...

ENERGY-CONCENTRATING AND NEST-SHAPED STRUCTURE-FORMING BUNDLE DEVICE FOR PREVENTING LOST CIRCULATION AND REINFORCING BORE WALL, AND APPLICATION THEREOF IN PREVENTION OF LOST CIRCULATION IN KARST CAVITY

An energy-concentrating and nest-shaped structure-forming bundle device for preventing lost circulation and reinforcing a bore wall, and application thereof in prevention of lost circulation in a karst cavity. The device comprises an outer slotted metal pipe (1) and an inner nest-shaped structure-forming explosion component. The slotted metal pipe (1) has helical slots (2) or linear slots (3) on a pipe wall thereof. The nest-shaped structure-forming explosive component is a core shaft (5) having several explosion recesses (4). Explosives are placed in the recesses (4). The slotted metal pipe (1) is sleeved and fixed on the core shaft (5). The core shaft (5) is in a loose fit with the slotted metal pipe (1). The present invention can solve the problem in which lost circulation material does not readily remain to form a support, and can improve the success rate of preventing lost circulation.

Image processing method and device, storage medium and electronic equipment

The invention discloses an image processing method and device, a storage medium and electronic equipment, according to the embodiment of the invention, after data uploaded by a user is obtained through an artificial intelligence platform, the data is automatically labeled, and labeled data is obtained. And determining a to-be-trained model according to the received training preference of the user for the model. And training the to-be-trained model based on the annotation data and the training parameters to obtain a trained model, and deploying the trained model to enable a user to call the trained model to execute an image processing task. According to the method, data labeling, model training and model deployment are achieved through the artificial intelligence platform, a developer does not need to develop the model by himself/herself, in addition, the suitable to-be-trained model is selected based on the training preference of the user, and the service quality of the artificial intelligence ...

Pressure self-compensation sealing ring with magnet ring

The invention discloses a pressure self-compensation sealing ring with a magnet ring. The pressure self-compensation sealing ring comprises a sealing ring body, the first magnet ring is arranged in the sealing ring body; the second magnet ring is arranged in the sealing ring body, the inner diameter of the second magnet ring is larger than the outer diameter of the first magnet ring, and the magnetic pole of the inner surface of the second magnet ring is the same as that of the outer surface of the first magnet ring. The outer surface of the first magnet ring and the inner surface of the second magnet ring generate repulsive force due to the same magnetic pole, so that the pressure self-compensation sealing ring with the magnet ring generates tension and has a pressure compensation effect; the pressure self-compensating sealing ring with the magnet ring can be tensioned by the aid of the tension to be in contact with a sealing surface in an attached manner, and leakage at a sealing position ...

Binaryzation method for CT (Computed Tomography) cross-sectional image of optical fiber coil containing artifacts

The invention discloses a binaryzation method for an artifact-containing optical fiber coil CT cross-sectional image. The binaryzation method comprises the following steps: firstly, carrying out brightness adjustment on a source image converted by an HSV image model by adopting a composite tangent function to obtain a first intermediate image; secondly, creating a planar morphological structure element similar to the form of the target object to obtain a background image without the target object; performing subtraction operation on the first intermediate image and the background image to obtain a second intermediate image; enhancing the image contrast of the second intermediate image again to obtain a third intermediate image; and finally, carrying out binarization processing on the third intermediate image by adopting a local adaptive threshold binarization algorithm, and removing background noise to obtain a final binarized image. According to the binaryzation method for the CT section ...

MULTI-PHASE UNDERGROUND SYRINGE AND SIDEWALL REINFORCEMENT METHOD

A multi-phase underground syringe and sidewall reinforcement method are provided. An axial through hole (13) is set up in the center of a launch tube (1) of the multi-phase underground syringe, and an ellipsoidal seeker (2) is connected to one end of the launch tube (1). At least two groups of seat holes (14) are set up along the longitudinal direction of the launch tube (1), and each group has at least two seat holes (14) which are radial symmetry arranged with each other. The internal end of each seat hole (14) is connected with the axial through hole (13) and the syringe tube (4) is set up in the seat hole (14) through a base (3). Cartridges (31) are set up between the base (3) and the seat hole (14). Said multi-phase underground syringe has the advantages of simple structure and convenience of operation. By injecting the glue cement to seal the leakage channel of the formation, the cracks can reduced or eliminated through the compression and shear force applied to the rock. It can rapidly ...

Double-sight light spot centroid calculation method based on center-of-gravity shift

The invention relates to a double-sight light spot centroid calculation method based on center-of-gravity shift, which is characterized in that the centroid positions of sub-light spots corresponding to two sight lines in a sub-aperture can be respectively positioned by utilizing information characteristics of a light spot image of a double-sight Hartmann wavefront sensor and adopting iterative centroid calculation of a variable wave gate. Compared with a correlation algorithm or a region division method commonly used in an existing double-sight-line centroid calculation method, the method has the advantages that the two groups of sub-light spots can be respectively positioned by adopting a simple centroid calculation mode, and the obvious advantage of calculation amount is achieved; and an efficient double-sight light spot centroid calculation technical route can be provided for wavefront reconstruction of the double-sight Hartmann wavefront sensor in accordance with a prior condition.

Line guide optical fiber air floating release kinetic analysis method

The invention discloses a dynamic analysis method for air floating release of a line guide optical fiber. The method comprises the following specific steps: 1) determining basic geometric parameters and material parameters of an optical fiber structure; 2) determining a missile flight path, including a trajectory curve function, a speed curve function and total flight time in a missile flight process; 3) establishing an optical fiber structure dynamic model; 4) solving the dynamic response of the current optical fiber structure; 5) judging whether the optical fiber releasing process is finished; if the release process is finished, continuing to execute the step 6; if the release process is not finished, updating the optical fiber model, and returning to the step 3; and 6) outputting a dynamic response result of the optical fiber far-field floating release process. The dynamic analysis model of the large-span optical fiber structure is established based on the elastic catenary units, the ...

Unmanned aerial vehicle throwing device and unmanned aerial vehicle

The invention belongs to the technical field of unmanned aerial vehicles, and particularly relates to an unmanned aerial vehicle throwing device and an unmanned aerial vehicle, the unmanned aerial vehicle throwing device comprises a reel mechanism, a driving mechanism and a rope winding assembly, a winding rope is wound on the reel mechanism, and a throwing object is carried at the tail end of the winding rope; the driving mechanism is used for driving the reel mechanism to move to wind and unwind the winding rope; the rope winding assembly comprises a rope penetrating ring, and one end of a winding rope penetrates through the rope penetrating ring to fix a throwing object. The driving mechanism drives the rope winding assembly to move while driving the reel mechanism to move, and then the rope penetrating ring is made to reciprocate in the axial direction of the reel mechanism. The unmanned aerial vehicle is carried with the unmanned aerial vehicle throwing device, the winding rope is ...

MASTER-SLAVE CONTROL METHOD FOR BELT CONVEYOR DRIVEN BY MULTIPLE MOTORS

Disclosed is a master-slave control method for a belt conveyor driven by multiple motors, wherein motors of one driving portion are regarded as a group. Operation parameters of each motor in the group are acquired, and one or more of torque balance, speed balance, and load balance between the multiple motors is/are realized only by controlling the rotational angular speed of each motor according to the master-slave distribution scheme for the multiple motors. According to the method, torque balance, speed balance, and load balance of a group of motors in one driving portion of the belt conveyor can be realized, and the damage to the motors, motor driving devices, and mechanical parts can be reduced.

Modeling method of large-size light-weight condensation error reflecting surface

The invention discloses a modeling method of a large-size light-weight condensation error reflecting surface, which comprises the following steps of: deducing the maximum side length of a plane approximation curved surface, namely the allowable diameter of a modeling plane; performing frame triangular mesh generation on the spherical surface, adding errors, and generating an error reflecting surface formed by splicing large triangular planes; continuously dividing each large triangle into a plurality of triangular units, enabling the grid side length of each small triangular unit to be smaller than the maximum side length deduced in the step 1, and then adding a reflection surface type surface error RMS value of photogrammetry to grid points of the small triangular units; and carrying out triangular plane generation on the points with the added errors, and then analyzing a light intensity distribution result by using a common optical analysis method Monte Carlo light trace tracking method ...

Sun orientation model control method based on space solar power station ground verification system

The invention discloses a sun orientation model control method based on a space solar power station ground verification system, and the method comprises the following steps: 1, building a three-cable sun orientation physical model of an air structure platform according to a static equilibrium equation; 2, selecting an initial balance position and a balance posture of the aerial structure platform; 3, according to the sun orientation requirement, the real-time cable length is calculated, and the posture of the aerial structure platform is adjusted; 4, according to data fed back by the Beidou differential positioning device, cable length error compensation adjustment is carried out, and closed-loop control is achieved; the invention provides a three-cable sun orientation model suitable for a ground demonstration and verification system development scheme and a control method thereof for testing and controlling a sub-system and a sub-link for track operation aiming at the sun orientation requirement ...

Free space orbital angular momentum broadcast communication system based on all-optical chaotic modulation

The invention discloses a free space orbital angular momentum broadcast communication system based on all-optical chaos modulation, which is characterized in that a main laser in an encryption sending end generates a broadband chaos carrier signal through a conventional optical feedback structure, and optical information is hidden in a chaos optical carrier for encryption in an intensity modulation mode; a specially-designed multi-order multiplexing phase plate is loaded on a spatial light modulator in the light field regulation and control module, and Gaussian encryption light signals in a space light path are regulated and controlled into multiplexing light beams with a plurality of OAM modes; after free space link transmission, a plurality of opposite single-order phase plates are respectively loaded on a spatial light modulator in the OAM broadcast module to realize related light field mode demodulation which corresponds to a plurality of users of a receiving end respectively; and in ...

Dynamic monitoring method for air release process of complex winding optical fiber coil

The invention discloses a method for dynamically monitoring the air release process of a complex winding optical fiber coil, and the method comprises the steps: enabling two independently wound optical fiber coils to be connected end to end through a welding method, and enabling the two independently wound optical fiber coils to be fixed on an aircraft; a universal device is mounted on a mandrel of each optical fiber coil, and an optical fiber at the tail end of each optical fiber coil is fixed through a fiber fixing device; the tail ends of optical fibers of the two optical fiber coils sequentially penetrate through the corresponding universal devices and the corresponding fiber fixing devices respectively and then are connected to a distributed measuring system on the ground, the two optical fiber coils continuously and automatically release the optical fibers in the flying process, and a closed optical path is formed. And the distributed strain or temperature in the released and unreleased ...

UNFOLDING MECHANISM OF SPATIAL PLANAR THIN-FILM ANTENNA

The present invention discloses an unfolding mechanism of a spatial planar thin-film antenna, comprising an unfolding mechanism, and a planar thin film connected to the unfolding mechanism via a pull cable. Rigid frames hinged to each other at a head and a tail end thereof, a pair of short synchronizing rods connecting the rigid frames, a pair of connecting rods, and a pair of long synchronizing rods hinged to each other are provided on the unfolding mechanism, forming a skeleton of the unfolding mechanism. A pair of rigid frames, a pair of short synchronizing rods, and a pair of long synchronizing rods are respectively hinged via circumferential joints. The long synchronizing rods and the rigid frames are hinged via radial joints, and the short synchronizing rods and the rigid frames are hinged via radial joints. The circumferential joints and the radial joints are provided with pulleys, and a cable sequentially passes through the pulleys on the circumferential joints and the radial joints ...

Stepped shaft shoulder punching equipment

The stepped shaft shoulder punching equipment comprises two top plates and side plates, a fixed cross and a movable cross are arranged between the two top plates, the fixed cross is fixedly connected with the side plates, and the movable cross is located between the fixed cross and the shoulder face of a stepped shaft to be machined and movably connected with the side plates. A pressurizing device is installed between the fixed cross and the movable cross and used for driving the movable cross to move in the axial direction of the side plates and gradually get close to the shoulder face, the face, facing the shoulder face, of the movable cross is provided with a drill bit extending in the axial direction, the top end of the drill bit is hinged to the movable cross, and the tail end of the drill bit abuts against the shoulder face. The driving device is installed on the fixed cross and drives the drill bit to rotate through the transmission device, the driving device and the drill bit are ...

Photon reserve pool calculation system based on reflective semiconductor optical amplifier

The invention discloses a photon reserve pool computing system based on a reflective semiconductor optical amplifier. The photon reserve pool computing system comprises an input layer, a reserve pool layer and an output layer, wherein the signal preprocessing is carried out on the input layer, the mask process of the input signal is completed, and the mask input signal is injected into the reserve pool layer; sampling the output light of the RL at equal time intervals on a reserve pool layer, and obtaining N sampling points as virtual nodes of a reserve pool; and recording the states of all virtual nodes on a delay line from RL to RSOA at an output layer, calculating through a ridge regression algorithm to obtain an optimal read weight, and then carrying out linear weighted summation on the states of the virtual nodes and the read weight to obtain a final result.

Ground adjustment device and method for satellite-borne planar film array antenna

The invention discloses a ground assembling and adjusting device for a satellite-borne planar film array antenna. The ground assembling and adjusting device comprises a truss and an electrode plate, a plurality of tension cable position adjusting devices and electrode plate height adjusting devices are arranged on the truss; the electrode plate is fixedly connected to the truss through an electrode plate height adjusting device; a planar film array antenna is arranged at the lower part opposite to the electrode plate; the film array antenna is connected with the periphery of the truss through a tension cable position adjusting device; the electrode plate comprises an electrode layer and an organic glass plate, and the organic glass plate is connected with the electrode plate height adjusting device; a photogrammetry system is further arranged on the front face of the truss and comprises a camera, and the camera is used for shooting the shape and the position state of the planar film array ...

Visual experiment device and method for migration and diversion of proppant

The invention discloses a visual experimental device and experimental method for migration and diversion of a proppant, and relates to the technical field of rock stratum proppant experimental equipment and method.The visual experimental device comprises a containing mechanism used for containing a rock sample, and the rock sample is provided with a plurality of pores; the pressurizing mechanism is connected with the accommodating mechanism and is used for applying pressure to the rock sample and the pores; the heating mechanism is connected with the accommodating mechanism and is used for increasing the temperature of the rock sample; the fluid injection mechanism is connected with the containing mechanism and used for injecting fluid into the holes. The proppant injection mechanism is connected with the accommodating mechanism and is used for injecting a proppant into the pores; and the data acquisition mechanism is used for acquiring motion information of the proppant and the fluid in ...

Novel federal semi-supervised learning lung tumor segmentation method and device

The invention discloses a novel federal semi-supervised learning lung tumor segmentation method and device, and the method comprises the steps: carrying out the preprocessing of lung tumor data, obtaining the preprocessed data, and dividing the preprocessed data into a supervised data set and an unsupervised data set; using the preprocessed data to train a 2D U-Net segmentation model based on a federal semi-supervised learning framework, and obtaining a trained 2D U-Net segmentation model; the training comprises supervised client training and unsupervised client training; and inputting lung tumor data to be segmented into the trained 2D U-Net segmentation model, and outputting a lung tumor segmentation result. Through the federal semi-supervised learning framework, the problem of data heterogeneity of different clients can be relieved at the same time, so that model offset is reduced.

Robustness design method for feed excitation of microwave energy transfer transmitting antenna system

The invention discloses a robustness design method for feed excitation of a microwave energy transfer transmitting antenna system. The method specifically comprises the following steps: step 1, solving an ideal array factor and a power directional diagram of a square planar array antenna; 2, calculating the beam collection efficiency and the highest level according to a result obtained in the step 1; step 3, establishing an optimization model based on a result obtained in the step 2 to find optimal feed excitation; step 4, establishing a worst condition analysis model based on a result obtained in the step 3, and searching worst feed excitation with an error; and step 5, calculating the maximum tolerance according to results obtained in the step 3 and the step 4. According to the method, the optimal solution can be ensured to have the maximum tolerance interval under the condition that the worst beam collection efficiency meets the user requirement.

Unmanned express delivery vehicle for community

The invention relates to a community unmanned express delivery vehicle which comprises a compartment, a lifting device, a mechanical arm, a driving device and a central control device. A plurality of storage bins are longitudinally arranged in the compartment, and the same side ends of the storage bins are open. The lifting device is fixed to one side of the open end of the storage bin. A lifting platform of the lifting device is used for moving in the arrangement direction of the multiple storage bins. The mechanical arm is fixed at the top of the carriage; the driving device is fixed at the bottom end of the carriage; the central control device comprises a map module, a vision module and a control module; the map module is used for constructing a map and positioning the position of the trolley; the visual module is used for detecting whether an obstacle exists in the range or not and positioning a target; the control module is electrically connected with the lifting device, the mechanical ...

All-optical chaotic space synchronous generation device and method

The invention provides an all-optical chaos space synchronous generation device, comprising: a chaos signal generation module comprising a first laser and a light reflector, a laser signal emitted by the first laser being reflected by the light reflector and then being injected into the first laser for generating a main chaos signal; the free space channel is used for transmitting a main chaotic signal; the signal receiving module comprises an optical fiber delay line and a second laser; the signal receiving module is used for receiving a main chaotic signal transmitted by a free space channel and dividing the main chaotic signal into a first main chaotic signal and a second main chaotic signal. The device provided by the invention is simple in structure, does not need a complex optical path, is simple to operate, can achieve high-quality chaos space synchronization, and has important significance for achieving chaos space secret communication with large capacity, high speed and high confidentiality ...

Mesh antenna wire mesh transmission and reflection coefficient analysis method

The invention discloses a mesh antenna wire mesh transmission and reflection coefficient analysis method, which mainly comprises the following steps of: deducing coordinate points of minimum repetitive units of a wire mesh according to wire mesh model parameters; secondly, the minimum repetitive unit curve of the metal wire mesh is determined through periodic cubic spline interpolation, and a metal organization structure is obtained through vector superposition; thirdly, metal wire mesh electromagnetic analysis periodic unit coordinate points are extracted through the discretized metal wire mesh organization structure curve, and a metal wire mesh electromagnetic analysis periodic unit entity model is established to achieve metal wire mesh transmission coefficient and reflection coefficient analysis; finally, the transmission coefficient and the reflection coefficient of the deformed wire mesh are analyzed through static force. According to the mesh antenna wire mesh transmission and reflection ...

Three-dimensional test device and method for simulating overlying strata motion characteristics under mining influence

The invention discloses a three-dimensional test device and method for simulating overlying strata motion characteristics under mining influence. The device comprises a loading device, a test box and an overlying strata motion monitoring device, the loading device comprises a press machine supporting frame, a hydraulic oil cylinder, an oil pressure controller and a test box pressing plate; the test box comprises a box body and a coal and rock stratum simulation device. The coal rock stratum simulation device comprises a chassis, a vertical lifting rod, a small flat plate, a hinge ball, a hinge controller and a small hydraulic controller; the overlying strata motion monitoring device comprises a stress sensor, an acoustic emission sensor, a thermal infrared imager, a 3D laser scanner, a miniature high-definition camera and a data acquisition processor. The device is simple in structure and convenient to use, various mining methods can be simulated, mining parameters can be freely adjusted ...

Application of arbuscular mycorrhizal fungi in relieving continuous cropping obstacles of crops, fungicide containing arbuscular mycorrhizal fungi and application of fungicide

The invention relates to the technical field of microbial agents. The invention provides application of arbuscular mycorrhizal fungi in relieving continuous cropping obstacles of crops, a fungicide containing the arbuscular mycorrhizal fungi and application of the fungicide. The arbuscular mycorrhizal fungi are utilized to effectively improve the soil microflora richness and the soil enzyme activity, the continuous cropping obstacle of the curcuma wenyujin is relieved, the quality of the curcuma wenyujin is improved, and remarkable economic benefits are achieved.

Multipath chaotic laser generating device and chaotic laser generating method

The invention provides a multi-path chaotic laser generating device and a laser generating method, and the laser generating device comprises a chaotic laser generating module which is used for generating chaotic laser; the vortex multiplexing module is used for enabling the chaotic laser to carry multi-order OAM information; and the information acquisition module is used for acquiring the chaotic laser which is emitted by the vortex multiplexing module and carries the multi-order OAM information. The device is simple in structure, can achieve double secrecy of an optical communication system, can improve the communication capacity of the system, achieves high-speed and secrecy free space laser safety communication, provides possibility for utilization of chaotic beam space dimensions, and improves the optical communication capacity while achieving information secrecy transmission. When parameters and actual requirements are changed, the technical effect can be achieved only by simulating ...

High-capacity free space chaos safety communication system based on orbital angular momentum multiplexing

The invention discloses a high-capacity free space chaos security communication system based on orbital angular momentum multiplexing, which is characterized in that a chaos carrier signal is generated by a main laser in an encryption sending end through a conventional optical feedback structure, and optical information is hidden in a chaos optical carrier for encryption in an intensity modulation mode; the two paths of information are modulated into two vortex light beams with different spatial topological charges through a spatial light modulator in the OAM multiplexing module, and the vortex light beams enter a free space link for transmission after being multiplexed by a beam combiner; after free space link transmission, opposite single-order phase plates are loaded on spatial light modulators of the OAM demultiplexing module respectively to realize demodulation of corresponding link light field modes; and in the synchronous receiving module, local chaotic synchronization is realized ...

Rural residence light-biogas energy storage integrated energy system two-stage robust optimization scheduling model considering carbon emission

The invention provides a rural residence light-biogas energy storage integrated energy system two-stage robust optimization scheduling model considering carbon emission, and belongs to the field of electric power system power supply scheduling. Constructing a grid-connected rural residence comprehensive energy system model integrating photovoltaic power generation, biogas fermentation heat supply and cooking and energy storage; constructing a carbon emission model in the biogas utilization process, a carbon reduction compensation model of photovoltaic power generation and a power grid electricity purchase carbon emission model; the uncertainty of photovoltaic power generation and electrical load is considered, a two-stage robust optimization day-ahead economic dispatching model is established, and solving is carried out based on a column constraint generation algorithm. The rural residence integrated energy system and the optimized dispatching model thereof have the remarkable effects of ...

Thin film micro-strip reflective array unit and micro-strip reflective array layout method capable of avoiding creases

The invention discloses a thin film micro-strip reflective array unit which comprises a metal patch layer, a polyimide thin film layer, an air layer and a metal floor supporting layer which are tightly attached in sequence. The micro-strip reflective array antenna unit is designed by taking the thin film as a medium, the structure is simple, the folding is convenient, the weight is light, and the folding and unfolding requirements of a large-aperture spaceborne antenna can be met; in consideration of the condition that folds exist in the folding process after a thin film reflective array antenna is formed, the invention further discloses a micro-strip reflective array layout method capable of avoiding the folds, the layout conditions under square, triangular and circular grids are analyzed, then the number of units where reflective array units intersect with the folds under different layouts is calculated according to the positions of the folds, and the number of the reflective array units ...

Mobile modular energy storage charging system and control method thereof

The invention discloses a mobile modular energy storage charging system and a control method thereof.The modular energy storage charging system is based on a mobile platform and comprises an alternating current input module, a direct current input module, an energy storage battery module, a DC/DC power conversion module, an AC/DC power conversion module, a direct current output module, a control module and a wireless communication module; the energy storage battery module is electrically connected with the DC output module and the AC/DC power conversion module through the DC/DC power conversion module. The control module receives a cloud control instruction through the wireless communication module and controls the AC input module, the DC input module and the DC/DC power conversion module according to the control instruction, and the AC/DC power conversion module, the DC output module and the energy storage battery module carry out charging and storage control according to a preset mode ...

Finite element modeling method of optical fiber coil

The invention discloses a finite element modeling method of an optical fiber coil, which comprises the following steps of: simulating contact between optical fibers by using a compressible and non-drawable rod unit by adopting an equivalent rod-beam combination model, processing the optical fibers as a composite section beam unit, simulating tension application of the optical fibers in an actual coil winding process according to an actual coil winding condition, and modeling and solving layer by layer. And finally completing modeling of the optical fiber coil. The problems that according to an existing optical fiber coil modeling method, solving of a contact unit is not prone to convergence, and stress and distribution conditions among multiple turns of optical fibers in a coil cannot be analyzed are solved, the simulation speed is greatly increased, the real coil winding condition can be visually reflected, the internal stress of the coil can be calculated, and then the working efficiency ...

Charging method and system based on mobile Internet of Things communication

According to the charging method and system based on mobile Internet of Things communication, an electric vehicle and a charger are both connected to a background management system through the Internet of Things, and the background management system intelligently matches the charger at the parking position of the electric vehicle for the electric vehicle according to a charging request initiated by the electric vehicle and issues a charging instruction to the charger; charging connection is established between the charger and the electric vehicle through the automatic charging connector, normal charging information interaction is carried out through the mobile internet of things, and charging service is provided for the electric vehicle. According to the invention, the mobile communication internet of things is utilized to realize the access of the electric vehicle and the charger to the background management system, the system hardware composition is simplified, the system hardware cost ...

Electric vehicle charging and discharging station energy control system and control method thereof

The invention relates to an electric vehicle charging and discharging station energy control system and a control method thereof.The system comprises a charging and discharging unit, an alternating current bus, a public network unit and a monitoring and service unit. If the capacity of the transformer is insufficient and the load of the line is continuously increased, the vehicle connected with the V2G charging pile can be used as an energy storage unit to discharge in real time through the authorization of a vehicle owner and the matching of a vehicle-pile-background process, reverse alternating current electric energy is provided for an alternating current bus within a set SOC, and in-station recycling of energy is realized; and the circuit burden of the power system is effectively relieved.