METHOD FOR MODIFYING INSECT RESISTANCE OF PLANTS BY UTILIZING RNAI TECHNIQUE

A method for improving insect resistance of plants, in which dsRNA of insect's gene is expressed in plants by using transgenic technique, and then the interfering RNAs are formed in the plants. The interfering RNAs then enter into insects' bodies after ingested by the insects that eat plant, and conduct RNA interference against the target gene. Therefore the expression of the target gene is suppressed by RNA interference. A new plant-mediated method for improving insect resistance by suppressing the growth of insects by RNA interference mechanism.

Calibration method for lunar rover binocular vision navigation system

The invention relates to a calibration method for a lunar rover binocular vision navigation system, which is designed against the characteristics of the binocular vision navigation system and comprises the steps of utilizing a measurement system for measuring a calibration device containing a back light reflection measurement mark and an encoding mark, obtaining a control point coordinate, utilizing a camera to be calibrated to carry out photographing on the calibration device, and then adopting a collinearity equation for calibrating internal parameters of the camera to be calibrated and external parameters of the camera to be calibrated under a coordinate system of the calibration device; and utilizing a theodolite measurement system to be matched with the calibration device for calibrating the coordinate system of a prism square, and utilizing the relationship between the coordinate system of the prism square and the external parameters of the camera for calibrating the external parameters ...

Genetic engineering method and material for increasing plant yield

Provided are a genetic engineering method and material for increasing plant yield. Up-regulation of the EXPA1 gene or the activity of EXPA1 polypeptide, or co-expression of the GhRDL1 and GhEXPA1 genes can improve plant properties, and are of value in crop and flower production.

GENETIC ENGINEERING METHOD AND MATERIAL FOR ENHANCING PLANT YIELDS

Provided are a genetic engineering method and material for increasing plant yield. Up-regulation of the EXPA1 gene or the activity of EXPA1 polypeptide, or co-expression of the GhRDL1 and GhEXPA1 genes can improve plant properties, and are of value in crop and flower production.

GENETIC ENGINEERING METHOD AND MATERIAL FOR INCREASING PLANT YIELD

The present invention relates to genetic engineering methods and materials for improving plant yields. The present invention discloses that upregulating EXPA1 gene expression or activity of EXPA1 polypeptide, or co-expression of GhRDL1 and GhEXPA1 gene can improve plant traits. These methods have applications in crops and flower productions.

Heat treatment method and device for preventing magnesium alloy from surface oxidation

The invention relate to a heat treatment method and device for preventing magnesium alloy from surface oxidation, belonging to the technical fields of metal materials and metallurgy. The heat treatment method comprises the following steps: laying magnesia powder with the thickness of greater than or equal to 10mm in a steel vessel, putting a magnesium alloy cast ingot to be subjected to heat treatment into the steel vessel, and completely covering with magnesia powder, wherein the covering depth is greater than or equal to 30mm; compacting the magnesia powder to isolate the cast ingot from air; covering a graphite powder layer with the thickness of 3-5mm on the surface layer of the magnesium oxide, and putting a steel top cover on the graphite to further isolate air; and sending the steel vessel with the cast ingot, magnesia powder and graphite powder into a resistance furnace to carry out heat treatment. The heat treatment device provided by the invention can effectively prevent the magnesium ...

Method for calibrating direction of three-probe start sensor

The invention relates to a method for calibrating the direction of a three-probe start sensor, which can effectively solve the problem of requirements on the calibrating accuracy and measuring accuracy of the direction of the three-probe start sensor. The technical scheme for solving the problem comprises the following steps of: combining three cubic prisms pairwise; linking four theodolites; aligning the every two combined cubic prisms by using the four theodolites respectively and recording data; performing mutual aiming; recording mutual aiming data; and resolving a rotation matrix between two reference cubic prisms. The method is easy and convenient to operate, has high calibration speed and high accuracy, does not need to focus for measuring and can effectively solve the problem of requirements on the calibrating accuracy and measuring accuracy of the direction of the three-probe start sensor.

METHOD FOR MODIFYING INSECT RESISTANCE OF PLANTS BY UTILIZING RNAI TECHNIQUE

A method for improving insect resistance of plants, in which dsRNA of ins ect's gene is expressed in plants by using transgenic technique, and then th e interfering RNAs are formed in the plants. The interfering RNAs then enter into insects' bodies after ingested by the insects that eat plant, and cond uct RNA interference against the target gene. Therefore the expression of th e target gene is suppressed by RNA interference. A new plant-mediated method for improving insect resistance by suppressing the growth of insects by RNA interference mechanism.

Method for improving insect resistance of plant by using RNAi technique

The invention discloses a method of enhancing the plant insect resistance, which ensures that insect gene expression dsRNA in a plant body is processed to form siRNA in the plant body through the transferring gene method, the RNA is interfered to the target gene through the phytophagy insect fetching food and coming into the plant body, and therefore the expression of the target gene is restrained. The invention discloses a new method which can utilize the plant as the medium to restrain the insect growth through the RNA interference mechanism and enhance the plant insect resistance for the first time.

Reliable speed regulator guide vane servomotor hydraulic locking system

The invention discloses a reliable speed regulator guide vane servomotor hydraulic locking system which comprises a speed regulator fault detection circuit (1), a speed regulator remote automatic control circuit (2), a monitoring circuit (3), a redundant UPC fault circuit (4), a locking input circuit (5) and a locking exit circuit (6) which are connected with a power source in parallel. The locking input circuit (5) comprises a first hydraulic locking input position switch (7) and a second hydraulic locking input position switch (8) which are sequentially connected in series; the locking and exiting circuit (6) comprises a first hydraulic locking and exiting position switch (9) and a second hydraulic locking and exiting position switch (10) which are sequentially connected in series. The method has the characteristic that the operation stability of the unit can be effectively improved.

Method for modifying insect resistance of plants by utilizing RNAi technique

Abstract A method for improving insect resistance of plants, in which dsRNA of insect's gene is expressed in plants by using transgenic technique, and then the interfering RNAs are formed in the plants. The interfering RNAs then enter into insects' bodies after being ingested by the insect that eats the plant, and conduct RNA interference against the target gene, thereby expression of the target gene is suppressed by RNA interference. A new plant-mediated method for improving insect resistance by suppressing the growth of insects by RNA interference mechanism. 534006_1 ...

METHOD FOR MODIFYING INSECT RESISTANCE OF PLANTS BY UTILIZING RNAI TECHNIQUE

A method for improving insect resistance of plants, in which dsRNA of insect's gene is expressed in plants by using transgenic technique, and then the interfering RNAs are formed in the plants. The interfering RNAs then enter into insects' bodies after being ingested by the insect that eats the plant, and conduct RNA interference against the target gene, thereby expression of the target gene is suppressed by RNA interference. A new plant-mediated method for improving insect resistance by suppressing the growth of insects by RNA interference mechanism.

Method for modifying insect resistance of plants by utilizing RNAi technique

Flexible pressure sensor for human motion/voice detection and preparation method and application thereof

The invention belongs to the technical field of flexible strain sensors, and particularly relates to a flexible pressure sensor for human motion/voice detection and a preparation method and application thereof. The invention relates to a MoS2/HEC/PU (Polyurethane) sponge, electrodes and a PI (Polyimide) adhesive tape packaging layer, the polyurethane sponge is used as an elastic substrate, a MoS2/HEC coating is used as a conductive sensing layer, the electrodes are fixed on the upper surface and the lower surface of the MoS2/HEC/PU sponge through conductive silver paste, PI adhesive tapes are pasted on the two sides of the electrodes, so that the electrodes are more fixed and insulated from the outside, and the electrodes are flexible conductive silver-plated adhesive tapes. The flexible pressure sensor has the advantages of high sensitivity and quick response to wide-range pressure detection, can be used for monitoring human body action signals, can realize voice recognition through throat ...

Plant epidermal hair specific expression promoter F1F1 and use thereof

The invention discloses a novel specific expression promoter for plant epidermal hairs. The promoter is separated from Gossypium arboretum. The invention also discloses a vector containing a promoter sequence, and a host cell. The invention discloses application of the promoter as well. The promoter is particularly useful to improve plant quality at fixed points.

Cotton verticillium wilt germ secreted exciton gene and its application

The present invention provides non-specific exciton gene VdNEP of Verticillium dahliae capable of causing disease resisting allergic reaction on cotton and other plant and its application. VdNEP protein can induce the expression of Arabidopsis thalianum disease course related gene. Low concentration VdNEP protein can induce suspended cotton cell to synthesize gossypol as phytoalexin, while high concentration VdNEP protein can induce the allergic death of suspended cotton cell. When it is injection to cotton cotyledon, the protein in low concentration may cause allergic necrosis spot and the protein in high concentration may cause cotyledon wilting. Treating mature cotton euphylla with the protein will cause the euphylla dewatering. Applying VdNEP provides new way of improving plant disease resistance and has wide application foreground.

Animal ceratin transgenic cotton fibre and its gene engineering method

Sewage treatment system and cross-flow filtration system control method

The invention discloses a sewage treatment system and a cross-flow filtration system control method. The sewage treatment system comprises a circulating tank, a cross-flow filtering membrane device and a water producing pipeline. The cross-flow filtering membrane device comprises a circulating pipeline, a circulating pump and a filtering membrane assembly, the water inlet end and the water outlet end of the circulating pipeline are connected with the circulating tank, the circulating pump and the filtering membrane assembly are arranged on the circulating pipeline, and the circulating pump is used for providing power for the feed liquid, so that the feed liquid flows parallel to the membrane surface of the filtering membrane assembly for cross-flow filtering. The water producing pipeline is connected with the water producing end of the filtering membrane component. The sewage treatment system further comprises a microbubble generating device, and the microbubble generating device is connected ...

Heat-resistant magnesium alloy and preparation method thereof

The invention discloses a heat-resistant magnesium alloy and a preparation method thereof. The heat-resistant magnesium alloy consists of the following components in percentage by mass: 3%-8% of Al, 0.5%-1.5% of Zn, 0.1%-0.7% of Sr, 0.3%-1.5% of CaO, and the balance of Mg and inevitable impurities. According to the heat-resistant magnesium alloy, Zn, an alkaline-earth element Sr and CaO are added into the Mg-Al alloy, so that the microscopic structure of the magnesium alloy is improved by multi-element micro-alloying, and thus, the mechanical performances of the magnesium alloy are improved; by reasonably selecting alloying elements and controlling the content of cheap adding elements, the collaborative invigorating effects of the components are brought into play, the mechanical performances and heat resistance of the magnesium alloy are improved; the microscopic structure is uniform, the alloy flame retardant property is excellent, and the room-temperature and high-temperature strength ...

Silk fibroin transgenic cotton fibre and genetic engineering process for preparing it

Method for promoting plant seed augmentation and cotton fibre growth by using RDL1 gene

The invention provides application of a plant RDL1 gene or RDL1 protein in improving properties of crops seeds, and a method for improving properties of crops seeds. Particularly, the invention provides a gene engineering method for promoting the crops seeds to enlarge and cotton fiber to lengthen by utilizing the plant RDL1 gene. The invention also provides a vector containing the RDL1 gene, a host cell, a method for preparing transgenic plants and a method for obtaining seeds with improved properties through the transgenic plants. The method can increase the volume of the seeds and the weight of the seeds, and lengthen seed fiber and/or increase the strength of the seed fiber, plays a positive role in improving the yield and properties of crops, and has extensive application prospects.

Method for regulating volatile oil content of plant by using MicroRNA156 and its target gene

The invention relates to a method for regulating volatile oil content or sesquiterpene content of plant by using MicroRNA156 and its target gene. The invention for the first time discloses a key gene, a Squamosa promoter binding protein gene (SQUAMOSA PROMOTER BINDING PROTEIN-LIKE genes, SPLs), for regulating synthesis of volatile oil or sesquiterpenes of plant, and the gene is a target gene for miR156. SPLs directly bonds with a sesquiterpene synthase promoter and activates transcription, and through transgenic technology, it is confirmed that the mechanism plays a role in many plants, so that plants with high yield of plant volatile oil can be obtained based on the method.

Method for modifying insect resistance of plants by utilizing RNAi technique

A method for improving insect resistance of plants, in which dsRNA of insect's gene is expressed in plants by using transgenic technique, and then the interfering RNAs are formed in the plants. The interfering RNAs then enter into insects' bodies after being ingested by the insect that eats the plant, and conduct RNA interference against the target gene, thereby expression of the target gene is suppressed by RNA interference. A new plant-mediated method for improving insect resistance by suppressing the growth of insects by RNA interference mechanism.

Method for modifying insect resistance of plants by utilizing rnai technique

The present invention discloses a method for improving insect resistance of plants, in which dsRNA of insect's gene is expressed in plants by using transgenic technique, and then the interfering RNAs are formed in the plants. The interfering RNAs then enter into insects' bodies after being ingested by the insect that eats the plant, and conduct RNA interference against the target gene, thereby expression of the target gene is suppressed by RNA interference. A new plant-mediated method for improving insect resistance by suppressing the growth of insects by RNA interference mechanism.

Method for improving characters of gossypol in cotton, and use thereof

The invention relates to a method for improving characters of gossypol in cotton, and a use thereof. In the invention, expression of a cadinene-8-hydroxylase gene CYP 706 B 1 in cotton seeds is down-regulated specifically thus synthesis of gossypol in cotton seeds is inhibited effectively without an influence on synthesis of gossypol in other tissues. Through the method, characters of gossypol ina cotton plant are improved and an integrated utilization value of cotton is increased greatly.

Calibrating method of laser dot-matrix device of obstacle avoidance system of lunar rover

The invention relates to a calibrating method of a laser dot-matrix device of an obstacle avoidance system of a lunar rover, which can effectively solve the problems on precisely calibrating the relationship between 18 laser beams in the laser dot-matrix device and a reference prism coordinate system of the laser dot-matrix device and the relationship between reference prism coordinate systems ofan obstacle avoidance camera. The method comprises the following steps of: taking a photograph of a laser dot by using the camera; processing the image to obtain an image point coordinate; carrying out triangular surveying based on internal parameters of the camera to obtain a three dimensional coordinate; obtaining the three dimensional coordinate of the laser dot under a double-camera photographic surveying system by using the processed photograph; establishing the relationship between marked points on the double cameras and a bracket and the coordinate system, the coordinate of the laser dot ...

Heatproofing magnesium alloy with stable high-temperature strength

The invention discloses a heatproofing magnesium alloy with stable high-temperature strength. The heatproofing magnesium alloy comprises the following components by weight percent: 3%-5% of Y, 1%-2% of Gd, 0.5%-1.5% of Sm, 0.5%-1.5% of Nd, 0.5%-1% of Ca, and the balance of Mg and inevitable impurities. The heatproofing magnesium alloy has a prominent characteristic in heat-resistant quality, namely very stable high-temperature tensile strength, at 200 DEG C-300 DEG C, the tensile strength of the magnesium alloy reduces along with temperature rising in small amplitude about 10%, at room temperature, the tensile strength can reach 246MPa, at 300 DEG C, the tensile strength still can reach above 200MPa; compared with commercial heatproofing magnesium alloy WE54, the heatproofing magnesium alloy has lower cost and more stable high-temperature strength, and has wide application prospect in fields such as aerospace, automobile industry, weapons and the like.

Voice control system and voice electronic product

The utility model relates to a voice control system and a voice electronic product, and the system comprises a wireless receiving module which is used for receiving an information source; the MCU control module decodes the received information source and then sends a corresponding instruction to the voice control module; the voice control module is used for playing voice; the wireless receiving module is connected with the MCU control module, and the MCU control module is connected with the voice control module. The voice control system provided by the utility model can be used for multiple developments.

Electrical equipment cleaning method based on cleaning machine

The electrical equipment cleaning method based on the cleaning machine comprises the following steps that S1, a rotating disc is rotated to drive a rotating rod to rotate, a positioning rod is driven to rotate through cooperation of a driving wheel, a guide wheel and a belt, then a bevel gear drives a fixing rod and an extension rod to rotate, the length of the extension rod is changed, and a high-pressure spray pipe is pulled to rotate; the device is scientific and reasonable in structure and safe and convenient to use, a water pumping and circulating swing mechanism is arranged, deionized water in a water storage tank is fed into a water storage cylinder through cooperation of a high-pressure water pump and a water outlet pipe, a diaphragm is pushed to rise, and the water storage cylinder is driven to rotate along with increase of the deionized water in the water storage cylinder. When the pressure is increased, the sealing plate is pushed to descend, sealing of the connecting cylinder ...

Method for calibrating star sensor

The invention relates to a method for calibrating a star sensor, which can effectively solve the problems of low calibrating speed, low efficiency and high hardware requirements of the star sensor. The method comprises the following steps of: calibrating internal parameters of the star sensor to obtain a coordinate of a mark point in a coordinate system of a photogrammetric system; carrying out image processing on a picture and calculating internal parameters of cameras; establishing a transit surveying coordinate system; carrying out measurement on a manual surveying mark of a calibrating field by using a transit surveying system to obtain a three-dimensional coordinate of the manual surveying mark in the coordinate system of the transit surveying system; carrying out common point conversion by utilizing a three-dimensional coordinate value to obtain a conversion relation of the coordinate system of the calibrating field and the coordinate system of the transit surveying system and converting ...

Silk fibroin transgenic cotton fibre and genetic engineering process for preparing it

A cotton fibre containing silk fibroin gene is prepared by genetic engineering, which includes PCR amplication to E6 gene fragment of Chinese cotton's genom DNA, designing primer, screening library of Asian cotton genom to obtain GAE6-3A clon, specific expression of GAE6-3A promoter in cotton fibre, extracting DNA from silkworm, reverse transcription, cloning the gene for coding silk fibroin, loading in expression carrier, preparing its antibody by immunizing rabbit, configuring plant transgenic carrier of silk fibroin and transferring to cotton.

Method for improving plant resistance to insects

A method for improving plant insect resistance includes providing target genes derived from insects. Constructs based on the nucleotide sequences of these target genes are designed to form interfering molecules. After being eating by insects, the plant can significantly inhibit expression of corresponding genes in insects. This inhibition is not affected by barrier of the insect digestive systems. The method can improve the insect resistance of plants, reduce pesticide applications, lower the costs of agricultural production, and protect the environment.

Cotton laccase transgenic plant and its application

Said invention provides a novel plant gene-cotton laccase gene and coded protein thereof. Said invention also discloses the use of laccase gene, especially in improving plant resistance to phenolic acid like material and removing trichlorophenols etc environment pollutant from soil utilizing transgene plant.

Animal ceratin transgenic cotton fibre and its gene engineering method

An animal ceratin transgenic cotton fibre and its gene engineering method are disclosed. The genome DNA of Asian cotton is amplified by E6 gene fragment through PCR method. The primer is designed according to the sequence. The genome library of Asian cotton is screened by PCR-96 pore plate method to obtain the gene's GAE6-3A clone. The length of its inserted fragment is about 8K6. The length of upstream promotor is 1457 bp. The general DNA of rabbit is extracted to obtain coded ceratin gene of rabbit hair by amplification clone, which are installed into prokaryotic expression carrier to obtain efficient expression. The immunized chicken is used to prepare ceratin antibody. The ceratin transgenic carrier of plant, driven by GAE6-3A promotor, is further built up. The cotton is finally gene-transformed.

Device and method for testing bending performance of coating and plating layer

The invention belongs to the technical field of inspection and detection, and particularly relates to a device and a method for testing the bending performance of a coating. The test device comprises a first clamping mechanism, a second clamping mechanism and a rotating shaft. The first clamping mechanism and the second clamping mechanism are rotationally connected through a rotating shaft; a fixing unit and a first handle are arranged on the first clamping mechanism, and a test piece pressing unit and a second handle are arranged on the second clamping mechanism. According to the technical scheme, the manual bending test of the coating test piece can be directly carried out, the manual bending test is supported to accurately bend the coating test piece to 90 degrees and 180 degrees, and based on the lever principle, through the arrangement of the first handle and the second handle, the force requirement for bending the coating test piece is reduced, and the coating test piece can be relatively ...

METHOD FOR IMPROVING PLANT RESISTANCE TO INSECTS

A method for improving plant insect resistance includes providing target genes derived from insects. Constructs based on the nucleotide sequences of these target genes are designed to form interfering molecules. After being eating by insects, the plant can significantly inhibit expression of corresponding genes in insects. This inhibition is not affected by barrier of the insect digestive systems. The method can improve the insect resistance of plants, reduce pesticide applications, lower the costs of agricultural production, and protect the environment. 1. A method for improving insect resistance in a plant , characterized in that the method comprises:expressing an interfering molecule that specifically interferes with the expression of an insect gene in the plant, wherein said insect gene is selected from trypsin precursor gene, dopa decarboxylase gene, NADH dehydrogenase ubiquinone flavoprotein 2 gene, ATP synthase beta subunit gene, or myosin heavy chain isoform B gene.2. (canceled)3. The method according to claim 1 , characterized in that said interfering molecule is selected from: a dsRNA claim 1 , an antisense nucleic acid claim 1 , a small interfering RNA claim 1 , or an miRNA targeting said insect gene or its fragment or a transcript thereof for inhibiting or silencing that target gene.5. The method according to claim 4 , characterized in that step (2) comprises:{'i': 'Agrobacterium tumefaciens', '(a) providing carrying an expression vector, wherein said expression vector contains said construct of (1);'}{'i': 'Agrobacterium tumefaciens', '(b) contacting a plant cell, a plant tissue, or a plant organ with of step (a), thereby transfecting said construct into the plant cell, the plant tissue, or the plant organ.'}6. The method according to claim 4 , characterized in that said Seqis selected from:SEQ ID NO: 1 or the sequence located at nucleotides 1-576 thereof;SEQ ID NO: 2 or the sequence located at nucleotides 311-621 thereof;SEQ ID NO: 3 or the sequence ...

Method for improving bearing capacity of cast-in-place pile and cast-in-place pile reinforcing structure

The invention discloses a method for improving the bearing capacity of a cast-in-place pile and a cast-in-place pile reinforcing structure. According to the method, a group of axial reinforcing holes are drilled in an existing cast-in-place pile, the reinforcing holes are drilled in a bearing stratum for 1 m, then a group of steel tubes are placed in the reinforcing holes, bottoms of the steel tubes are closed, a group of grouting holes with diameters of 10 mm are formed oppositely within a length range of 5 m from tube bottoms at intervals of 500 mm, and second grouting is performed on the bottom of the cast-in-place through the steel tubes, so that the bearing capacity of the cast-in-place pile is improved. Compared with the prior art, the method has the advantages of rapidness in construction and convenience in installation, in addition, the bearing capacity of the pile can be effectively improved, the construction period can be shortened effectively, and the construction cost can be ...

Dynamic and real-time measuring method in airspace engine assembling process

The invention relates to a dynamic and real-time measuring method in an airspace engine assembling process, and can effectively solve problems in the prior art that the measuring method is long in preheating and standby time, low in measuring speed, affected by surrounding ambient vibration and low in measuring accuracy. The technical scheme for solution comprises the following steps: 1. a central axis of an engine jet pipe is measured; 2. the central position of a bending pipe of the upper part of the engine jet pipe is measured; 3. a reference coordinate system for the engine jet pipe is established; 4. the central axis of a connecting pipe is measured; 5. the central position of the bending pipe of the upper part of the connecting pipe is measured; 6. the reference coordinate system for the connecting pipe is established; 7. the reference coordinate systems of the engine jet pipe and the connecting pipe are converted; 8. assembling is measured; and 9. anti-collision data of the engine ...

Watermelon hybrid seed production method

The invention relates to a watermelon hybrid seed production method which comprises the following steps: (1) seed production site and soil selection; (2) parent purification; (3) seed sowing; (4) culture management; (5) hybrid pollination; and (6) collection. According to the method, female parent castration, female flower double bagging, rear 5-6-section topping uniform female parent pollinated melons and the like are performed in advance, thereby effectively preventing hybridization and enhancing the hybrid seed production purity and hybrid seed production efficiency.

Gene engineering method for inhibiting formation of cotton toxin in cottonseed

The gene engineering method for inhibiting formation of cotton toxin in cotton seed is characterized by that under the drive of specific promotor of seed two cDNA (cad1-A and cad1-C) antisense sequences of cadinene synthetase gene are introduced into the cotton, and after these antisense sequences are transcripted in the seed, the antisense RNA is produced to inhibite the expression of normal cadiene synthetase gene so as to obtain the gene engineering cotton whose cotton toxin cotent in the cotton seed is greatly reduced and the cotton toxins in the other organs are not changed. Said invented technical scheme possesses the advantages of strong specificity and high efficiency.

Method for calibrating star sensor

The invention relates to a method for calibrating a star sensor, which can effectively solve the problems of low calibrating speed, low efficiency and high hardware requirements of the star sensor. The method comprises the following steps of: calibrating internal parameters of the star sensor to obtain a coordinate of a mark point in a coordinate system of a photogrammetric system; carrying out image processing on a picture and calculating internal parameters of cameras; establishing a transit surveying coordinate system; carrying out measurement on a manual surveying mark of a calibrating field by using a transit surveying system to obtain a three-dimensional coordinate of the manual surveying mark in the coordinate system of the transit surveying system; carrying out common point conversion by utilizing a three-dimensional coordinate value to obtain a conversion relation of the coordinate system of the calibrating field and the coordinate system of the transit surveying system and converting ...

Flame-retardant high-strength magnesium alloy and preparation method thereof

The invention discloses a flame-retardant high-strength magnesium alloy and a preparation method thereof. The magnesium alloy comprises the following components in percentage by mass: 3%-7% of Al, 0.5%-2.1% of Y, 0.5%-1.5% of CaO and the balance of Mg and inevitable impurities. The alloy component of the flame-retardant high-strength magnesium alloy is Mg-Al-Y-CaO; by adding a rare earth element Y and calcium oxide into the Mg-Al alloy, the ignition point of the magnesium alloy is improved and meanwhile, the microstructure of the magnesium alloy is improved by virtue of alloying and the tensile strengths at room temperature and high temperature conditions of the magnesium alloy are further improved; by virtue of controlling the content of a specific rare earth element and introducing a cheap calcium oxide component, the mechanical properties and heat-resistant and flame-retardant properties of the magnesium alloy are significantly improved, the problem that the existing magnesium alloy ...

Calibration method for lunar rover binocular vision navigation system

The invention relates to a calibration method for a lunar rover binocular vision navigation system, which is designed against the characteristics of the binocular vision navigation system and comprises the steps of utilizing a measurement system for measuring a calibration device containing a back light reflection measurement mark and an encoding mark, obtaining a control point coordinate, utilizing a camera to be calibrated to carry out photographing on the calibration device, and then adopting a collinearity equation for calibrating internal parameters of the camera to be calibrated and external parameters of the camera to be calibrated under a coordinate system of the calibration device; and utilizing a theodolite measurement system to be matched with the calibration device for calibrating the coordinate system of a prism square, and utilizing the relationship between the coordinate system of the prism square and the external parameters of the camera for calibrating the external parameters ...

Heavy-load high-speed reciprocating abrasion testing machine

The invention discloses a heavy-load high-speed reciprocating abrasion testing machine which comprises a base on the lower portion and loading equipment on the upper portion, a stroke sliding rail is arranged on the upper portion of the base, a sliding plate capable of sliding on the stroke sliding rail in a reciprocating mode is installed on the stroke sliding rail, and a fixing base used for fixing a tested piece is arranged above the sliding plate. A loading rod for testing a tested piece is arranged at the lower part of the loading equipment, and an oil spraying pipe for spraying lubricating oil to the tested piece is also arranged at the lower part of the loading equipment. The heavy-load reciprocating abrasion testing machine provided by the invention not only can flexibly and stably realize heavy-load high-speed reciprocating operation of the abraded surface of the sample piece in a continuous lubricating state, but also is convenient for keeping the transverse stress of the sample ...

Creep-resistant rare earth magnesium alloy

The invention discloses a creep-resistant rare earth magnesium alloy consisting of the following components in percentage by weight: 4-6% of Y, 0.5-2% of Zn, 0.5-1.5% of Ca, 0.5-1.2% of Sb and the balance of Mg and inevitable impurities. The creep-resistant rare earth magnesium alloy has very excellent creep resistance; under the condition that the creep temperature is 250 DEG C and the stress is 70MPa, the total amount of creep in 100 hours is not more than 0.24%, and the steady-state creep rate is 8.48*10<-9>s<-1>, so that the creep performance of the creep-resistant rare earth magnesium alloy is obviously superior to that of a WE43 magnesium alloy; compared with a commercial magnesium alloy namely WE43 alloy, the use level of rare earth in the creep-resistant rare earth magnesium alloy disclosed by the invention is reduced, and an appropriate amount of cheap elements including Ca, Zn, Sb and the like are added into the alloy, so that the cost is obviously reduced, the creep resistance ...

Calibrating method of laser dot-matrix device of obstacle avoidance system of lunar rover

The invention relates to a calibrating method of a laser dot-matrix device of an obstacle avoidance system of a lunar rover, which can effectively solve the problems on precisely calibrating the relationship between 18 laser beams in the laser dot-matrix device and a reference prism coordinate system of the laser dot-matrix device and the relationship between reference prism coordinate systems of an obstacle avoidance camera. The method comprises the following steps of: taking a photograph of a laser dot by using the camera; processing the image to obtain an image point coordinate; carrying out triangular surveying based on internal parameters of the camera to obtain a three dimensional coordinate; obtaining the three dimensional coordinate of the laser dot under a double-camera photographic surveying system by using the processed photograph; establishing the relationship between marked points on the double cameras and a bracket and the coordinate system, the coordinate of the laser dot ...

Plant-mediated insect RNA (Ribonucleic Acid) interference reinforced by using cysteine protease

The invention provides a method for reinforcing plant-mediated insect RNA (Ribonucleic Acid) interference by using cysteine protease. In the method, a construct for expressing an insect gene dsRNA (double-stranded Ribonucleic Acid) and a construct for expressing plant cysteine protease are transferred to a plant cell, tissue or organ, so that the plant cysteine protease and the insect gene dsRNA can be expressed in the plant cell, tissue or organ.

Multi-element heat-resistant magnesium alloy

The invention discloses a multi-element heat-resistant magnesium alloy which consists of the following components in percentage by mass: 5-7% of Al, 0.5-1.2% of Y, 0.3-1% of Nd, 0.5-1% of Ca, 0.5-1% of Sb, less than 0.2% of impurity elements Fe, Cu and Ni in total and the balance of Mg. With the components Mg, Al, Y, Nd, Ca and Sb, the multi-element heat-resistant magnesium alloy disclosed by the invention has good high-temperature tensile strength and high-temperature creep resistance; the elements are reasonably matched; on the basis of controlling the content of the alloy elements and particularly the content of rare-earth elements, the cheap metals Ca and Sb are introduced, so that the alloy cost is reduced; the synergistic reinforcing effect of the rare-earth elements Y and Nd, the alkaline-earth element Ca and the element Sb is comprehensively utilized, so that the high-temperature mechanical properties of the magnesium alloy are remarkably improved. Thus, the magnesium alloy is suitable ...

Plant epidermal hair specific expression promoter F1F1 and use thereof

The invention discloses a novel specific expression promoter for plant epidermal hairs. The promoter is separated from Gossypium arboretum. The invention also discloses a vector containing a promoter sequence, and a host cell. The invention discloses application of the promoter as well. The promoter is particularly useful to improve plant quality at fixed points.

GENETIC ENGINEERING METHOD AND MATERIAL FOR INCREASING PLANT YIELD

A method includes increasing EXPA1 gene expression or increasing the activity of EXPA1 polypeptide to produce a plant with an improved trait. The method may further include increasing the expression of RDL1 gene or the activity of RDL1 kpolypeptide. expression of GhRDL1 and GhEXPA1 Co-expression of EXPA1 and RDL genes can improve plant traits. These methods have applications in crops and flower productions. 1. A method for improving a plant trait of a plant , the method comprises: increasing an expression of EXPA1 gene or an activity of EXPA1 polypeptide in the plant.2. The method according to claim 1 , characterized in that the method further comprises: increasing an expression of RDL1 gene or an activity of RDL1 polypeptide in the plant.3. The method according to claim 1 , wherein the increasing is achieved by introducing and expressing EXPA1 gene in the plant.4. The method according to claim 2 , wherein the increasing is achieved by introducing and expressing RDL1 gene in the plant.5. The method according to claim 1 , characterized in that the EXPA1 polypeptide is one or more selected from the following:(a) a polypeptide having the amino acid sequence of SEQ ID NO: 8 or 10;(b) a protein derived from (a) having substitution, deletion, or addition of one or several amino acids in the amino acid sequence defined in (a) and having a function of improving plant traits; orthe RDL1 polypeptide is one or more selected from the following:(a1) a polypeptide having the amino acid sequence of SEQ ID NO: 2, 4, or 6;(b1) a polypeptide derived from (a1) having substitution, deletion, or addition of one or several amino acids in the amino acid sequence defined in (a1) and having a function of improving plant traits.6. The method according to claim 1 , characterized in that the EXPA1 gene having the following polynucleotide sequence:(a2) the nucleotide sequence of SEQ ID NO: 7 or 9;(b2) a nucleotide sequence hybridized with the sequence defined in (a2) under a stringent condition ...

Rock inhibitor, and preparation method therefor and use thereof

A ROCK inhibitor represented by formula (I), and a preparation method therefor and a use thereof. The ROCK inhibitor has excellent ROCK inhibition activity, particularly shows good selective inhibition on ROCK2 kinase, has good safety and metabolic stability, and is high in bioavailability. The preparation method for the ROCK inhibitor is simple, and the ROCK inhibitor is easy to purify, and therefore has a good application prospect.

PROCESS FOR MODIFYING INSISTANCE PLANT RESISTANCE THROUGH THE USE OF RNAI TECHNIQUE

Rock inhibitor, and preparation method therefor and use thereof

A ROCK inhibitor represented by formula (I), and a preparation method therefor and a use thereof are provided. The ROCK inhibitor has excellent ROCK inhibition activity, particularly shows good selective inhibition on ROCK2 kinase, has good safety and metabolic stability, and is high in bioavailability. The preparation method for the ROCK inhibitor is simple, and the ROCK inhibitor is easy to purify, and therefore has a good application prospect.

Method for improving plant resistance to insects

Inhibidor de rock, y método de preparacion para el mismo y uso del mismo.

Un inhibidor de ROCK representado por la fórmula (I), y un método de preparación para el mismo y un uso del mismo. El inhibidor de ROCK tiene una excelente actividad de inhibición de ROCK, particularmente muestra una buena inhibición selectiva sobre la cinasa ROCK2, tiene una buena seguridad y estabilidad metabólica, y es alta en biodisponibilidad. El método de preparación para el inhibidor de ROCK es simple, y el inhibidor de ROCK es fácil de purificar, y por lo tanto, tiene una buena perspectiva de aplicación. (Ver Fórmula I).

Rock inhibitor, and preparation method therefor and use thereof

Heterocyclic compound and use thereof

Disclosed is a heterocyclic compound as represented by formula (I), a tautomer thereof, or a pharmaceutically acceptable salt thereof. The compound has better inhibitory activity on TRPC5, has good metabolic stability in liver micro-particles, and has good clinical pharmacokinetic properties.

Compuesto heterociclico y uso del mismo.

Se describe un compuesto heterocíclico representado por la fórmula (I), un tautómero del mismo o una sal farmacéuticamente aceptable del mismo. El compuesto tiene mejor actividad inhibitoria sobre TRPC5, tiene buena estabilidad metabólica en micropartículas hepáticas y tiene buenas propiedades farmacocinéticas clínicas. (VER FORMULA).

植物表皮毛特异表达启动子fif1及其应用

Rock inhibitor, and preparation method therefor and use thereof

A ROCK inhibitor represented by formula (I), and a preparation method therefor and a use thereof. The ROCK inhibitor has excellent ROCK inhibition activity, particularly shows good selective inhibition on ROCK2 kinase, has good safety and metabolic stability, and is high in bioavailability. The preparation method for the ROCK inhibitor is simple, and the ROCK inhibitor is easy to purify, and therefore has a good application prospect.

Heterocyclic compound and use thereof

Disclosed is a heterocyclic compound as represented by formula (I), a tautomer thereof, or a pharmaceutically acceptable salt thereof. The compound has better inhibitory activity on TRPC5, has good metabolic stability in liver micro-particles, and has good clinical pharmacokinetic properties.

Heterocyclic compound and use thereof

一种方便使用的眼部观察镜装置

本实用新型是一种方便使用的眼部观察镜装置，包括夹钳装置、支撑杆、挤压装置和卡槽，支撑杆的顶端固定安装夹钳装置，支撑杆的末端固定安装卡槽，“U”型的卡槽的表面开有圆孔，挤压装置穿过通孔安装在卡槽上，所述的夹钳装置是由夹板Ⅰ、保护层Ⅰ、夹扣Ⅰ、夹扣Ⅱ、夹板Ⅱ、保护层Ⅱ、弹簧Ⅰ和弹簧Ⅱ组成，保护层Ⅰ粘贴在夹板Ⅰ表面上，保护层Ⅱ粘贴在夹板Ⅱ表面上，夹板Ⅰ和夹板Ⅱ的两端固定安装夹扣Ⅰ和夹扣Ⅱ，夹扣Ⅰ表面安装弹簧Ⅰ，支架的一端固定安装在拉手，支架的另一端固定安装在面板，弹簧Ⅲ固定安装在支架上，不会有卡顿情况的发生，可以大大减轻重量，体积也缩小，安装的时候可以大大缩减时间，提高工作效率。

Heterocyclic compound and use thereof

Disclosed is a heterocyclic compound as represented by formula (I), a tautomer thereof, or a pharmaceutically acceptable salt thereof. The compound has better inhibitory activity on TRPC5, has good metabolic stability in liver micro-particles, and has good clinical pharmacokinetic properties.

Heterocyclic compound and use thereof

Disclosed is a heterocyclic compound as represented by formula (I), a tautomer thereof, or a pharmaceutically acceptable salt thereof. The compound has better inhibitory activity on TRPC5, has good metabolic stability in liver micro-particles, and has good clinical pharmacokinetic properties.

High-speed sealing test device

Disclosed is a high-speed sealing test device. The device specifically includes a support platform and an electric main shaft. The electric main shaft is fixedly mounted on the support platform, one end of the electric main shaft is connected to a sealing test mechanism through a clamping device, one end of the sealing test mechanism is connected to a pressurizing mechanism, the pressurizing mechanism is configured to apply an axial load to the sealing test mechanism, and the sealing test mechanism is configured to simulate an experiment of dynamic sealing. During test, a movable ring is mounted on a movable ring clamp and a stationary ring is mounted on a stationary ring clamp. When the movable ring clamp and the stationary ring clamp rotate relatively, they put a strict requirement on seal performance.