130results about How to "Facilitate research work" patented technology

The invention discloses a roadway surrounding rock stress monitoring device based on fiber bragg grating sensing. Grooves are symmetrically carved in a metal rod along the axial center, an FBG set is fixedly installed inside each groove, FBGs serve as sensitive elements, when roadway surrounding rock is deformed, the stress of the surrounding rock will be changed, therefore, force is generated through the metal rod, surface micro-deformation is generated, the grating distances of the FBGs attached to the metal rod are changed along with the metal rod, the center reflection wavelength of the FBGs can be caused to generate drifting, wavelength signals are demodulated into electrical signals through an FBG interrogator, and the stress situations of different sites can be obtained. The roadway surrounding rock stress monitoring device has the advantages that installation is easily achieved, and the roadway surrounding rock stress monitoring device is suitable for wide popularization; power is not required to be supplied to the working face end, and site safety is guaranteed; all-optical measurement and fiber transmission are adopted, and influences of electromagnetic interference are effectively avoided; the temperature error is compensated, and the accuracy is improved; the surrounding rock stress monitoring results can be timely and accurately provided, and guidance on site production and scientific research is facilitated.

The invention relates to a manual simulation plant climate box, which comprises a box body and an equipment room, wherein the equipment room is located at the back side of the box body; the box body is constituted of a top cover, a base plate and a side plate; an electrical box, a refrigerating unit, a humidifier and a carbon dioxide steel cylinder are set in the equipment room; the box body is also provided with a camera, an ultraviolet ray lamp tube, a sensor unit, a plant cultivation frame and an air processor; an air flow channel is set between a top plate and the top cover and the air flow channel is shaped like a long strip; the top plate is provided with an inserted buckle; an inserted-type light-supplementing lamp bar is mounted in the inserted buckle; and a top plate at the outskirt of the inserted-type light-supplementing lamp bar is provided with a ventilation hole. The advantages are that comprehensive simulation to natural environment or specified environment is performed; each of factor is controlled separately and also coordinated as a whole; specified light strength, temperature, humidity and carbon dioxide concentration can be acquired; the best growth environment of plants in each stage inside the box body can be simulated; and comparative test can be performed by controlling certain environmental factors.

The invention relates to a coal mine paste filler online monitoring system based on optical fiber grating sensing, and belongs to a mine filler online monitoring system. Before space of each measuring point is filled, a supporting rod is fixed to a filling space bottom plate through ground anchors, a telescopic rod telescopically supports a filling space top plate, an optical fiber grating sensor group is mounted in the middle of the telescopic rod, and an optical fiber connector is lead out of the tail part of the supporting rod and connected to a mine optical cable through optical fiber, so that an optical grating monitoring signal is transmitted to an optical fiber grating demodulation instrument; and a demodulated signal is transmitted to a computer system, and a paste filler is subjected to real-time online monitoring and analysis process after the space is filled. The system has the advantages as follows: the equipment installation is simple, and the system is suitable for general popularization; underground power supply is not required, and the scene safety is guaranteed; full-optical measurement and optical fiber transmission are adopted, so that influence of electromagnetic interference is effectively avoided; a temperature compensation optical grating is adopted for compensating temperature errors, so that the monitoring accuracy is improved greatly; and the monitoring result can be timely provided, and guidance of scene production and scientific research is facilitated.

The invention discloses a medical big data multi-center integration platform and method. Data of each data branch center server are accessed to a data center server and subjected to quality assessment, and a next step is entered if the quality assessment passes; if the quality assessment fails, the data center server feeds back the conclusion of failure to each corresponding data branch center server; the quality assessment includes the assessment of data integrity, data repetition rate, data bias and data size; the data center server establishes and maintains standard variables and a standarddictionary, meanwhile, preprocesses the data according to the standard variables and the standard dictionary; the data standardization processing includes standardization of the variables and standardization of data values; a one-to-one mapping relationship between data variables of the data branch center servers and the standard variables of the data center server is established by means of a similarity matching algorithm and manual auditing; and the data standardized by the data center server are utilized.

The invention discloses a prediction method of skin conditions. The method comprises the following steps of: acquiring the skin data of a testee; and digitizing the skin data to acquire the characteristic attributes of the skin; extracting the key characteristics from the characteristic attributes by adopting a characteristic extraction method to acquire an order result of the key characteristics according to importance degrees thereof; and normalizing all the ordered key characteristics; training and iterating an NN (Neural Network) by utilizing the normalized key characteristics as a training data set to generate an NN-based prediction model; and predicting and analyzing the skin conditions of the testee by utilizing the NN-based prediction model and generating and outputting skin improvement opinions aiming at the testee according to an analysis result. Compared with a traditional prediction method, the prediction method of skin conditions and the prediction system of the invention save time and cost, are simple and practical, is suitable for repeatedly training and studying based on more training data and have operation effects according with traditional experimental results and reasonable presentations to unknown data.

The invention discloses a deformable mechanical jellyfish based on cam-gear compound transmission. A jellyfish head, a jellyfish body and a jellyfish tail are connected and sealed through waterproof glue; the jellyfish main body is composed of the jellyfish tail and a multi-connection-rod mechanical arm, and a remote-control switch is arranged in the jellyfish body; when a main control board sendsan instruction, a speed reducing motor rotates to drive a cam disc to rotate, the cam disc rotates to drive a cam rack to do feed motion, the cam rack can drive the multi-connection-rod mechanical arm to move in a quick-returning and slow-stretching mode, meanwhile the cam rack can drive a plurality of gears to rotate through the feed motion, the gears rotate to drive a sliding rack to do feed motion, a sliding rack can drive connection rods to do feed and rotation motion, and a locating structural part and a sliding head component are further driven to do vertical motion. By means of a cam-gear structure combined bionic transmission mechanism and by means of controlling motion of a plurality of motors, bionic motion that the jellyfish quickly returns and slowly stretches to drive the head to shrink can be achieved; thus, convenience is brought to underwater detection and scientific work, and the deformable mechanical jellyfish has a wide application prospect.

The invention discloses a composite etchant used for 409L ferritic stainless steel and a using method of the composite etchant. The etchant comprises: an etchant (1): the weight ratio of the etchant (1) is: the weight ratio of trinitrophenol is in the range of 4.4% to 4.7%; the weight ratio of aqueous hydrochloric acid solution with a concentration of 37% is in the range of 5.2% to 14.9%; the weight ratio of benzalkonium chloride is in the range of 1.0% to 6.0%; and the weight ratio of ethanol is in the range of 74.4% to 89.4%; an etchant (2): the weight ratio of the etchant (2) is : the weight ratio of hydrochloric acid is in the range of 12% to 35%; the rest is distilled water. The using method comprises: after polishing, sample is firstly dipped into the etchant (1), and is taken out after 40 to 70 seconds and directly put into the etchant (2), and is taken out after 60 seconds and washed, parched and observed corrosion condition; in each cycle, residence time of the sample in the etchant 1 declines 10 seconds than last cycle, and the minimum residence time of the sample is 10 seconds, and the residence time of the sample in the etchant (1) is unchanged. The invention has the advantages of keeping surface of the 409L ferritic stainless steel sample clear after being corroded, high display quality of grain boundary and grain, and long preservation time for the etchant. And the invention can be used repeatedly so as to reduce discharging of waste liquid and be in favor of environment protection.

The invention belongs to mine pressure on-line monitoring systems, and discloses a working face mine pressure on-line monitoring system based on fiber grating sensing. According to the monitoring system, a plurality of measurement points are selected on a working face in a pit, one monitoring system is installed inside each measurement point, a hydraulic control valve of each monitoring system is installed in a hydraulic support and is connected with a pressure guide hole of an intrinsic safety type fiber grating pressure meter through an oil pipe, an optical signal of the intrinsic safety type fiber grating pressure meter is transmitted to a fiber grating demodulator on the ground through an optical fiber and a mining optical cable, the fiber grating demodulator is demodulated into a digital signal to be transmitted to a computer system, and the computer system carries out real-time monitoring and analysis processing. The working face mine pressure on-line monitoring system based on the fiber grating sensing has the advantages of being simple in installation, adopting full-optical measurement and optical fiber transmission, being capable of effectively avoiding influence of electromagnetic interference, greatly improving monitoring accuracy due to adoption of a temperature compensation grating for compensating a temperature error, and being capable of timely providing a working face mine pressure monitoring and predicting result so as to bring convenience to production and scientific researches of a guidance site.

The invention provides a coal mine tunnel roof stress online monitoring system based on a fiber grating sensor and a method thereof, and is suitable for the field of tunnel mine pressure monitoring. The coal mine tunnel roof stress online monitoring system based on the fiber grating sensor comprises monitoring and observation stations which are arranged on the roof of the tunnel of the two sides of a coal face. Each monitoring and observation station comprises three roof stress monitoring devices. The roof stress monitoring devices in each monitoring and observation station are connected in series together through communication optical fibers. The tail fiber of the lead-out end optical fiber of the monitoring and observation station of each tunnel tail end is connected with an optical fiber terminal box through the communication optical fiber. The optical fiber terminal box is connected with a fiber grating static demodulator arranged on the ground through a transmission optical cable for mining. The fiber grating static demodulator is connected with a monitoring computer and a network server in turn. The network server is connected with multiple client sides through a coal mine local area network. The coal mine tunnel roof stress online monitoring system is high in measurement accuracy and long in the service life so as to realize real-time online monitoring of the coal mine tunnel roof stress.

The invention relates to a water-soluble CdTe nano-crystalline preparing process and appraratus, wherein the process comprises the steps of, preparing cadmium-sulfhydryl compound, preparing tellurium source, and inverse flow, while the tellurium source preparation comprises deacidizing NaBH4 through reducing agent to obtain NaHTe, vacuum-pumping, adding nitrogen and water, reacting for 10-40 minutes under the condition of 30-80 deg. C. The invention also discloses the apparatus for preparing the nano-crystalline.

The invention discloses a low-intensity pulse ultrasound-assisted rotary tubular cell / tissue culture system. The Lipus-assisted rotary tubular cell / tissue culture system comprises a culture main body provided with a rotating shaft, wherein an air chamber is sheathed outside the culture main body, the rotating shaft is arranged at both ends of the air chamber, one end of the culture main body is provided with an Lipus ultrasound instrument, the ultrasound transmitting probe of the Lipus ultrasound instrument is inserted into the culture main body, and the inner wall of the air chamber is provided with an oxygen concentration controlling part. The culture system can realize on-line oxygen supply and liquid supply, thereby being beneficial to the transport of oxygen, carbon dioxide and metabolin in the system and being capable of accurately controlling the oxygen concentration. By using the Lipus ultrasound instrument as an auxiliary means, the invention creates a favorable microenvironment for the proliferation or differentiation of cells or tissues, ultimately simulates the micro-gravity environment for carrying out three-dimensional dynamic culture, and can realize functions of oriented amplification and induced differentiation.

The invention relates to the fields of cytobiology and cell culture, and particularly relates to a breast cancer organoid culture kit. A method for realizing the kit comprises the following steps: (1)preparing, sub-packaging and using a breast cancer organoid culture medium A; (2) preparing, sub-packaging and using a breast cancer organoid culture medium B; and (3) preparing, sub-packaging and using a sample preserving fluid. The breast cancer organoid culture medium A is a DMEM / F12 culture medium containing 100 U / ml of penicillin, 0.1 mg / ml of streptomycin, 1% of HEPES and 1% of Gluta Max 100 X; the organoid culture medium B is a DMEM / F12 culture medium containing EGF, an FGF growth factor, an ALK inhibitor A83-01, Noggin, an HEPES buffer solution, Y27632 and one or more of a Wnt signalpath related secretory protein family R-Spondin 1-4; and the sample preserving fluid is a DMEM / F12 culture medium containing 100 U / ml of penicillin, 0.1 mg / ml of streptomycin and 1% of L-glutamine. The three components form the breast cancer organoid culture kit.

The invention relates to the field of electric power security, and in particular relates to a portable device and a method for researching the insulator contamination losing coefficient. The device comprises a raining sprayer and a water supply structure used for spraying water to the insulator, wherein the water supply structure comprises a water outlet pipe, a union and a water inlet pipe, the water outlet pipe and the water inlet pipe are connected by the union; the water inlet pipe further comprises at least one detachable water pipe; the detachable water pipes are connected by the union; a plurality of water outlets are arranged in two sides of the water outlet pipe, respectively; the water outlets are detachably connected with the raining sprayer; and valves are arranged on the water outlets; by using the detachable water supply structure to perform an insulator contamination losing coefficient experiment, the transportation and researches on a circuit field and a natural contamination are facilitated; furthermore, because the height of the water structure is adjustable, the raining function can be adjusted furthest, and the research works about the insulator contamination losing coefficient are facilitated.

The invention discloses a coal mine goaf top plate strain monitoring system and method based on fiber bragg grating sensing, and belongs to a coal mine top plate strain monitoring system and method. The system comprises a fiber bragg grating demodulation instrument, a monitoring computer, a mining transmission optical cable, a communication optical fiber and tail optical fibers, wherein a plurality of monitoring points are arranged in a goaf top plate; each monitoring point is provided with one fiber bragg grating strain sensor; the sensors in the monitoring points are connected in parallel through the tail optical fibers which access the mining transmission optical cable through optical fibers; the mining transmission optical cable is connected to an input end of the fiber bragg grating demodulation instrument on the ground; an output end of the fiber bragg grating demodulation instrument is connected with the monitoring computer; and the monitoring computer constitutes a fiber bragg grating strain monitoring system of coal mine goaf top plate all-fiber communication. The coal mine goaf top plate strain monitoring system and method based on the fiber bragg grating sensing have the advantages that all-optical measurement and optical fiber transmission are adopted, so that the influence of electromagnetic interference is avoided; equipment does not require power supply, so that essential safety of working face production is ensured; and real-time monitoring and analysis of coal mine goaf top plate strain are realized.

The invention discloses a pneumonia mycoplasma medium. According to the pneumonia mycoplasma medium, a container holds a solid medium and a liquid medium; the solid medium shows an inclined plane in the container, and 1 / 4-1 / 2 of the inclined plane is immersed in the liquid medium; the container also comprises a sealing member capable of sealing the internal space of the container; and the solid medium comprises compositions same to those of the liquid medium, besides 15-25 g / L of agar. The medium is used to detect pneumonia mycoplasma, helps to improve the detection specificity, is capable of obtaining a monoclonal bacterium colony and is convenient for downstream further research work based on the detection result.

The invention discloses a simulation test device of sedimentation post-treatment of a rain pipe in sea silt and a method and mainly relates to the field of vacuum preloading technology. The simulation test device comprises a test box. A deflection and strain measuring hole, a hole pressure measuring hole and a vacuum degree measuring hole are arranged in the side wall of the test box. A vacuum meter is installed in the vacuum degree measuring hole. A rain pipe and a micro pore water pressure gauge are arranged in the test box. A strain sheet and a deflection measuring sensor are arranged on the inner wall of the rain pipe. A plastic water discharging plate is arranged in the test box. A water discharging plate joint is arranged on the plastic water discharging plate. A water discharging pipe is arranged on the water discharging plate joint. The beneficial effects are that strain and deflection data of the rain pipe in the sedimentation post-treatment processes in sea silt can be effectively measured; vacuum degree and hole pressure can be measured; and the method can be used for researching influence law on deformation of the rain pipe imposed by change of the vacuum degree and the strain of the rain pipe in the sedimentation post-treatment processes in sea silt.

The invention discloses a device and a method for fully automatically and continuously capturing and collecting single cells. The device comprises a glass substrate, a PDMS (polydimethylsiloxane) microfluidics chip, an electromagnet, a permanent magnet matching part, a switch relay, a signal amplifying circuit and a signal collection control system, wherein the PDMS microfluidics chip is concavely engraved with a micro-channel; the micro-channel comprises a vertical main channel, a plurality of cell capturing channels and cell capturing holes; a sample inlet hole is formed in one end of the vertical main channel, the cell capturing channels are uniformly distributed at both sides of the vertical main channel, and each cell capturing hole is formed between the corresponding cell capturing channel and the main channel, and is provided with a cell detection gated channel; a cell collecting hole is formed in the tail end of each cell capturing channel; the electromagnet and the permanent magnet matching part are respectively positioned under the glass substrate and above the PDMS chip at a detection door. The device has the characteristics that the full automatic operation is realized; the single cells can be automatically captured and collected at high flux through the matching of the electromagnet, the permanent magnet matching part and the microfluidics chip.

The invention provides a method and system for achieving an intelligent ancient-writing identification platform based on an image identification technology. The method comprises the following steps that an ancient-writing image and information database, a client-side and a server-side for the intelligent ancient-writing identification platform based on the image identification technology are established; pictures of the client-side are received through the server-side and are identified; the identified information and information in the ancient-writing image and information database are compared, and comparison information is fed back to the client-side. By adopting the method for the intelligent ancient-writing identification platform based on the image identification technology, a user can use a browser and a mobile phone APP to perform whenever and wherever access, uses the intelligent ancient-writing identification platform to rapidly complete master to unknown ancient-writing related information and can enjoy the pleasure, rapidness and convenience brought by science and technology as much as possible, the precious time is saved for ancient-writing workers, the working pressure of the ancient-writing workers is relieved, and convenience is brought to ancient-writing research work.

The invention provides a special multifunctional multi-shaft numerically controlled clamp for processing a centrifugal vane wheel, and a manufacturing and installation method of the special multifunctional multi-shaft numerically controlled clamp. Each group of vane wheels in an engine consists of a plurality of vane wheels which have different sizes and are made from different materials. Lathes for processing the vane wheels of different types are different; and the strokes of the different lathes restrain the universal performance of the clamp. The special multifunctional multi-shaft numerically controlled clamp for processing the centrifugal vane wheel consists of a clamp main body (1), wherein the upper end of the clamp main body is connected with a fixed mandrel (2); a size-variable suitable ring sleeve (3) is arranged on the clamp main body; the upper end of the fixed mandrel is connected with a vane wheel blank (4); and the vane wheel blank is connected with a workpiece re-positioning pin (5). The invention relates to a special multifunctional multi-shaft numerically controlled clamp for processing the centrifugal vane wheel.

The invention relates to the fields of analytical chemistry and toy safety, in particular to a method for detecting multiple allergic aroma agents in toys, and is mainly the sample preparations and gas chromatography / mass spectrometry for the contents of 45 allergic aroma agents in various toys. The number and type of the allergic aroma agents are various; the boiling point range of the aroma agents is wide, and the requirements for quantity limit are high, so that how to perform simple, fast, efficient and green detection is a great challenge; the method in the invention overcomes the shortages of the existing method by thermal desorption preparation technology and gas chromatography / mass spectrometry technology; a detection method of multiple allergic aroma agents in toys is built; and the method can synchronously detect the contents of 45 allergic aroma agents in toys conveniently, fast, accurately and efficiently.

The invention provides a tumor specificity gamma delta T cell preparation method which comprises the following steps: S1, extracting autophagosome sourced from tumor cells; S2, collecting peripheral venous blood and obtaining mononuclear cells from the peripheral venous blood; S3, adding phosphoric acid antigen zoledronic acid (Zol) factors into the mononuclear cells to stimulate and induce multiplication culture of the gamma delta T cells to obtain gamma delta T cells; S4, performing co-culture on the autophagosome and the gamma delta T cells within preset time and preparing to obtain the tumor specificity gamma delta T cells. The specificity gamma delta T cells have stronger killing capacity on varieties of tumor cells, cytotoxic activity is obviously stronger than that of gamma delta Tcells prepared by a general method and from antigen; furthermore, the preparation method disclosed by the invention has the advantages of low preparation cost, simple work procedures, conditions easyto control, lower requirement in equipment and easiness in scale production.

The invention relates to a method for identifying bifidobactirium, in particular to a novel molecular biology method for identifying bifidobactirium. According to the method, PCR (Polymerase Chain Reaction) amplification and sequencing analysis are performed on two target gene segments on bifidobactirium 16SrDNA and one target gene segment on pyruvate kinase coded gene, so that the bifidobactirium strain can be identified on a seed level. The invention provides a more accurate practical method which is much easier for operation for identifying bifidobactirium and is favorable for sorting and research works of the bifidobactirium strains.

The invention relates to a special weft yarn air-flow active force testing device for the main jet nozzle of jet loom, which consists of a simulated main jet nozzle of jet loom, a tension sensor (15), a data acquisition card (16), a computer (17) and measured yarn (14); the center line of the simulated main jet nozzle of jet loom and the tension sensor (15) positioned in the same horizontal plane; one end of the measured yarn (14) is fixed on the center of the tension sensor (15), the other end is free; when the free end straightened levelly, it aligns to the weft insertion flow channel of the main jet nozzle of jet loom; and the tension sensor (15) delivers data to the computer (17) through the data acquisition card (16). The invention can obtain the accurate data of weft yarn air-flow active force by testing, is helpful for improving the research of jet loom, and plays a major part in improving the performance of jet loom.

The invention discloses an inductively coupled power transfer (ICPT) system resonance compensation parameter optimization method considering parallel transfer of signals and electric energy. The optimization method comprises the steps that based on the current relationship between primary and secondary side main circuits and branches and the current relationship between the branches in the ICPT system, the impedance of primary and secondary sides in the ICPT system and the output and input power and the electric energy transfer efficiency in the ICPT system, a mathematical model is established; an objective function is selected based on the mathematical model; a constraint condition of the objective function is determined; based on the mathematical model, the objective function, and the constraint condition, the resonance compensation parameters of the ICPT system are optimized. In the optimization design of the ICPT system parameters with synchronous transfer of the electric energy and the signals, the influence after the introduction of a signal transmission circuit is fully considered, the modeling is more accurate, and great convenience is provided for the research work such asresonance compensation parameter optimization, so that the purpose of improving the electric energy transfer efficiency is achieved.

The invention provides an integrated powder mixing and vacuum drying device and a powder mixing and drying system, and relates to the technical field of powder mixing equipment. The device comprises adevice base and a device body. The device body is rotationally arranged on the device base and comprises a shell, a powder mixing cylinder, an ordinary gear train, a driving motor and an air-tight connector. The driving motor and the ordinary gear train are fixed into the shell, and the driving motor is in transmission connection with the powder mixing cylinder through the ordinary gear train. The powder mixing cylinder comprises a center powder mixing roll, and the ordinary gear train comprises a first connecting shaft. The center powder mixing roll and the first connecting shaft form an airchannel, and the air channel can communicate with a vacuum pump through the airtight connector. The powder mixing and drying system comprises the vacuum pump and the integrated powder mixing and vacuum drying device. According to the integrated powder mixing and vacuum drying device and the powder mixing and drying system, even mixing and synchronous drying actions on metal powder and ceramic powder or different alloy system powder are completed at the same time.

The invention discloses a rapid hard ceramic coating ion plating device which comprises a vacuum chamber formed by a furnace wall, one side of which is provided with a furnace door, and the vacuum chamber is provided with a vacuum pumping port. The interior of the vacuum chamber is provided with round electric arc targets and a high-power cylindrical rotary electric arc target, wherein, the round electric arc targets are divided into 2N rows, N is more than or equal to 1, the round electric arc targets are uniformly distributed on the furnace wall, the high-power cylindrical rotary electric arc target is arranged at the centre of the vacuum chamber, and the space between the round electric arc targets and the central high-power cylindrical electric arc target is an ion plating deposition area, and work supports are distributed in the ion plating deposition area. The device fully utilizes the high ionization rate of the electric arc ion plating technology, greatly improves the deposition efficiency of the ceramic coating and overcomes the defects in the prior art that expensive ion sources need to be added so as to improve adhesive force, etc. The device has the advantages of high film plating efficiency, low film plating cost, convenient operation, and the like. The device can meet the demand of over-thick ceramic coating in industry and has good application prospect in industrial production.

The invention relates to a semi-physical simulation method for X-ray pulsar dynamic signals. The method includes 1) a step of setting spacecraft motional orbit parameters, observation pulsar parameters and observation time parameters, and generating pulsar signal dynamic contour data by a dynamic contour data generating server according to the set parameters, 2) a step of sending in real time the dynamic contour data by the dynamic contour data generating server to a radiation source flow controller every certain time, 3) a step of driving an X-ray generator, by the radiation source flow controller, to generate pulsar dynamic X-ray photon signals, and 4) a step of measuring an X-ray photon arrival event by an X-ray detector. The method achieves semi-physical simulation of the X-ray pulsar dynamic signals, and is suitable for verification and engineering technique research of a pulsar navigation system theoretical method.

The invention provides a method for the indoor culture breeding of Plasmopara viticola. The method comprises the following steps: 1, acquiring a Plasmopara viticola sample; 2, preparing a sporangium suspension; 3, selecting the grape variety and blade; 4, inoculating the sporangium suspension; and 5, carrying out blade moisturizing culture. The method has the advantages of simplicity, easy learning, low requirements on a tester, and culturing for 7-10 days under a same environment condition after blade morbidity, overcomes the defects comprising difficult survival, no indoor mass propagation of the Plasmopara viticola sample, and sporangium suspension insufficiency after the previous inoculation of the Plasmopara viticola, can be used for monitoring the Plasmopara viticola and determining the pathogenicity, and has very high practical application values.

The invention discloses a bionic leg type bounce experiment device. The bionic leg type bounce experiment device comprises a frame portion, a torso portion, a thigh portion, a knee joint portion, a lower leg portion, a sole portion, and a device drive control system; and the device drive control system is used for driving and controlling the operation of the entire experimental device. According to the bionic leg type bounce experiment device, a bounce device is driven by two hydraulic cylinders, and the characteristic of a large output force of the hydraulic drive is used for improving the bearing capacity of the device; the instantaneous curvature center trajectory of a specific biological joint motion is simulated by means of the rich motion characteristics of a gear-five-bar mechanism,so that the device gait is closer to the jumping motion of the creature, and an experimental platform is provided for studying the influence of the instantaneous curvature center trajectory on the jump performance; and the method of combining the hydraulic drive and the spring drive is used as an elastic actuator of a robot, so that the hydraulic system output energy with less power can be storedand then released suddenly in a periodic manner, therefore, the required power, shape volume and weight of the hydraulic power system are reduced, and the energy utilization efficiency is improved.

The invention discloses a melatonin derivative and a preparation method and application thereof. The preparation method comprises the following steps that natural melatonin is dissolved in a solvent,a catalyst is added at -2-2 DEG C, a stirring reaction is conducted, a reactant is added, the solvent is transferred to the place at 20-30 DEG C for a reaction, after an analytical reaction is completed through a thin layer chromatographic dot plate, ice water is added in reaction liquid for a quenching reaction, a water intake phase is extracted, rotary evaporation is conducted to remove water, residues are subjected to column chromatography separation and purification, and a final target molecular product is obtained. The water solubility of the prepared melatonin derivative is improved by near 700 times.