273results about How to "Meet the experimental requirements" patented technology

The invention discloses a nucleic acid isothermal amplification method by polymerase spiral reaction (PSR). A pair of oligonucleotide primers is used, mutually reverse nucleotide fragments are added to 5' ends of the primers, a target gene is subjected to PSR under the action of the primers and deoxyribonucleic acid (DNA) polymerase and under the isothermal condition, self-spiral extending of the target gene can be achieved, and thereby, nucleic acid amplification can be finished. According to the nucleic acid isothermal amplification method by PSR, a novel technology platform is provided for nucleic acid detection, amplification of a product is simple, an amplification product is applicable to the field of detection and can be slightly processed to be subjected to clone recycling and sequencing, the method can be applied to all fields which require nucleic acid amplification, the market prospect is wide, the economic and social benefits are large, and the method is suitable for large-range popularization and application.

The invention belongs to the technical field of foam performance study chip analysis, and mainly relates to a glass medium model that imitates a rock core structure and can be used for foam flooding and percolation mechanism study in tertiary oil recovery. The glass medium model includes a first liquid inlet pool, a second liquid inlet pool, a glass substrate, coverglass, a drainage hole, a drainage pool, a drainage pool channel, a micro channel imitating the rock core structure, a first liquid inlet hole, a second liquid inlet hole, a microbubble generation module and a microbubble splitting module. Specifically, the micro channel imitating the rock core structure is etched on the glass substrate; the first liquid inlet hole, the second liquid inlet hole, and the drainage hole are respectively disposed at two ends of the coverglass; the two liquid inlet holes are communicated with the microbubble generation module respectively through the two liquid inlet pools; the microbubble generation module is communicated with the microbubble splitting module; the microbubble splitting module is communicated with the micro channel imitating the rock core structure; and two ends of the drainage pool channel are respectively communicated with the tail of the micro channel imitating the rock core structure and the drainage pool, and the drainage pool is communicated with the drainage hole.

The invention relates to a punch formed metal bipolar plate of a proton exchange membrane fuel cell. The punch formed metal bipolar plate comprises a first metal plate and a second metal plate, wherein back sides of the two plates are welded by using laser; the front side of the first metal plate is provided with a sealed platform; the two plates are provided with intermittent corner guiding gutters between a flow field flow passage and each gas entrance; and the surrounding areas of cooling water entrances of the two plates are provided with strip-shaped grooves. The sealed platform can be made into a single battery with MEA through hot pressing, so sealing rings can be reduced, deformations are obviously improved, the sealing effect is good, and the assembly efficiency is greatly improved; the intermittent corner guiding gutters can distribute reaction gases for a plurality of times to ensure that the gases in an active region are distributed more uniformly and the phenomenon of 'flooding' is effectively eased up; the strip-shaped grooves not only can make the distribution of cooling water more uniform and guide the cooling water, but also strengthens the rigidity of the metal plates together with the sealed platform and can effectively slow down the deformation of each plate. The bipolar plate can be formed by two second metal plates, and is particularly suitable for assembling and testing and 'short stacks' and reducing the die sinking cost.

The invention relates to a LED light source system with flexural and adjustable light spectrum, and the LED light source system belongs to the photobiology research instrument field. The invention mainly comprises system hardware, system software, and a light spectrum flexible combination and adjusting method. The LED is connected with a LED array substrate in a movable plug way, so as to form a unit module and to build a LED array; the LED array is connected with a LED constant current drive circuit, the circuit is connected with a controller through a data line and a supply line, and then is connected with a power supply. The light spectrum flexible combination and adjusting method comprises a wavelength combination, the light density adjusting, the photoperiod adjusting and control, and the operation frequency adjusting and control. The invention solves the problems that the traditional light source cannot provide multi optical spectrum parametric combination, and cannot exactly quantify and modulate the optical spectrum parameters, can perform flexural modulate to the optical spectrum parameters according to the demands of the photobiology research experiment, and can get series light source of the multi optical spectrum parametric combinations with different wavelengths, different light densities, different photoperiods and different operational frequencies through exact quantification.

A multifunctional comprehensive ship combined power plant simulated experiment platform is divided into three layers from the bottom up; the bottom layer comprises a supporting base plate, which is mounted on a foundation through elastic blocks and provided with longitudinal slide ways; the middle layer comprises supports and holders; and the upper layer comprises two internal combustion engines,a variable-frequency motor, a parallel operation gearbox, a dynamometer, three resilient couplings, a diaphragm coupling, a universal coupling, a long drive shaft, a short connecting shafts, bearings, three torquemeters and sensors, which are mounted on the supports and the holders. The parallel operation gearbox is provided with four connectors, which are respectively connected with the No.1 internal combustion engine, the No.2 internal combustion engine, the variable-frequency motor and the dynamometer through the couplings and the drive shaft system; the experiment platform is provided with two short substitute shafts, the length of one of the short substitute shafts is equal to the universal coupling, the length of the other short substitute shaft is equal to the diaphragm coupling, and the two short substitute shafts can separately or simultaneously substitute the diaphragm coupling and the universal coupling. The experiment platform not only can simulate a variety of ship power systems, but also can conduct a study on the overall performance of a ship power system and a study on the performance of the parts of the ship power system.

The invention provides a hydraulic concrete member fracturing simulation experiment design method capable of applying biaxial acting force. The method comprises the steps of manufacturing a member for applying water pressure, fixing the member together with a square concrete die, pouring concrete into the die, performing vibration and maintenance, then detaching the die while remaining the member for applying water pressure in the concrete, forming a slit in a concrete test piece, and supplying a channel for applying water pressure to the slit. A biaxial experiment machine applies the set biaxial acting force to the concrete test piece; the member for applying water pressure is used for applying the water pressure to the concrete test piece until the test piece is fractured, and the water pressure applied when the test piece is fractured is recorded. The invention also provides a device used in the method. The method and the device used in the method are simple; the prepared concrete test piece can meet an experiment requirement and can be used for researching hydraulic fracturing of the concrete member in a biaxial stress state.

The invention relates to a strong-current pulse electron beam incident angle two-dimensional measurement device and method. The device comprises a stainless steel anode, an organic glass module holding body, one simple Faraday cylinder, (N+1) SSMA-type coaxial adapters, and N attenuation pieces, wherein N is not less than two. The device and method provided by the invention can effectively overcome the difficulties of precise centering and signal crosstalk in the research of an strong-current pulse electron beam incident angle.

The invention relates to a layered sampling testing device for a capillary water zone. n unit columns are connected is series and stacked, so that the device is formed; a separation net of each unit column is embedded into a net embedding plate; a sealing groove is a shallow-groove circular ring with the width of about 20mm and the depth of 1mm, and the shallow-groove circular ring is polished along the inner edge of the net embedding plate to the outer edge, and the diameter and the depth of the circular ring are approximately equal to the diameter and the thickness of the separation net; the lower surface of a lower flange, the edges of the sealing groove and the upper surface of the net embedding plate are painted with organic glass cement uniformly, so that a lower flange disk and the net embedding plate are attached together, and the separation net and an organic glass column pipe are fixed closely further; sizes of an upper flange and the lower flange of each unit column are the same with those of the inner diameter and the outer diameter of the net embedding plate, and a lower flange disk of a previous unit column can be stacked on an upper flange disk of a unit column of a next layer in a seamless manner; rib plates are arranged in position of joints of the upper flange disk, the lower flange disk and the organic glass column pipe; and the unit columns are connected through screws in flange screw holes, so that the unit columns are sealed, connected in series and stacked. The device is simple in structure, low in manufacture and maintenance costs, convenient in operation and high in applicability, and can be popularized and applied widely in fields such as civil engineering, geotechnical engineering and the like for physical simulation researches on various rock and earth masses under the action of capillary water.

The invention discloses a vehicle diesel engine oil and gas separator test apparatus and a method thereof. In the invention, an outlet port of an air cleaner is connected with one end of a flowmeter. The other end of the flowmeter is connected with an input port of an oil gas mixing box. A sidewall of the oil gas mixing box is provided with a fuel injector and a heater. A temperature controller is provided outside the oil gas mixing box. A pipeline from an outlet port of the oil gas mixing box to an air intake of an oil and gas separator is provided with a first particle counter and a first pressure gauge in order. A pipeline from an air outlet of the oil and gas separator to an input port of an absolute cleaner is provided with a second compression gauge and a second particle counter in order. An outlet port of the absolute cleaner is connected with one end of a throttle valve. The other end of the throttle valve is connected with a vacuum pump. A pipeline between the throttle valve and the vacuum pump is provided with an overflow valve. In the invention, oil gas mixing is carried out with only a simple oil injection apparatus, through adjusting fuel injection quantity, gas mixture concentration is controlled well, an experiment requirement is reached, and credibility of an experiment is ensured.

The invention discloses an explosion experimental device for simulating an underground free field environment. The device comprises a spherical pressure container, an inner wall sprayed layer, an operation sealing head, a detonation line interface, a pressure sensor test interface, an explosive fixing rod, a fixing groove, a water inlet, a water outlet, an installation base, a flange plate, toughened glass and a base support. The explosion experimental device has the beneficial effects that the spherical pressure container is used as a main body, meeting the requirement of certain amount of explosive for many experiments; the device can be pressurized so as to simulate a certain deep water environment; a spherical tank is provided with an observation window which allows an operator to observe shapes of bubbles in the tank in experiment; the interior of the tank is treated by spraying or pasting multiple layers of material better in wave impedance matching, so as to absorb or suppress reflected impulse load to realize an underground free field environment.

The invention relates to an oscillating hydrofoil drive system for water tunnel experiments. The system mainly comprises a support system, a power device, a fluid mechanical model, a transmission mechanism and a seal system, wherein the power device is connected with the fluid mechanical model through the transmission mechanism and the seal system. The oscillating speed and angle of the fluid mechanical model is quantitatively and accurately controlled to provide the design of fluid mechanical structure with theoretical basis and the exploration on dynamic flow mechanism and fluid-solid interaction mechanism with reliable analytic experimental data. The system is simple and compact in structure, space saving, easy to move and demount, low in production cost, and applicable to small-scale experimental researches such as water tunnel experiments; the sealing problem of the transmission device can be solved effectively; system failure caused by drive system parts contacting with water and decreased water tunnel experiment performance caused by water leakage of a water tunnel experiment segment are avoided.

The invention relates to the field of experimental equipment for testing soil mechanical properties in geotechnical engineering discipline, in particular to a spinning type coarse-grained soil triaxial experiment sample preparation device and sample preparation method. The spinning type coarse-grained soil triaxial experiment sample preparation device comprises a base, a counter-force frame, a rubber membrane, a sample preparation cylinder, a spinning device, a water permeable plate and a sample cap, wherein the base comprises an upper layer of cylindrical bosses, a middle layer of cylindricalbosses and a lower layer of cylindrical bosses with different diameters, and the counter-force frame comprises an annular bottom plate, a rigid counter-force column and a counter-force cover plate. The sample preparation method by utilizing the sample preparation device comprises the following steps: binding the rubber membrane on the base; arranging the annular bottom plate on the periphery of the upper layer of cylindrical bosses in a sleeving mode; installing the sample preparation cylinder; preparing the soil materials; filling the soil materials layer by layer and compacting; taking outa soil sample. According to the method, on the premise that the coarse-grained soil structure is not damaged, the coarse-grained soil sample used for the triaxial compression test can be prepared in ashort time, and the device is simple in structure, convenient to use, capable of accurately controlling layering and the total density of the coarse-grained soil, uniform in sample preparation, economical and practical.

The invention discloses a test device for realizing continuous production of fresh plant food under the simulated space microgravity effect, and mainly aims to make a research on the problem of supplying the fresh plant food to astronauts in a long-time and long-distance deep space manned spacecraft (such as a Mars landing spacecraft). The device consists of a trumpet-shaped variable-diameter light shade, a mobile circular planting module, a nutrient solution supplying pipeline and a power rotary unit. By using the device, the test research on high-efficiency continuous growth of different types of fresh plant food (such as leaf vegetables, root-stem vegetables and solanaceous vegetables) under the simulated space microgravity effect can be performed, and the test basis is provided for solving the problems of supplying the fresh plant food to the astronauts and making the astronauts physically and mentally healthy in the deep space manned spacecraft.

The invention relates to a fiber screen bag and a method for rapidly determining coarse fibers. After special fibers are used for making a screen with pore diameter being 25.0mum, a sample is put into a screen bag with certain size and is respectively boiled in acid and alkaline for 40min, then the sample is washed clean, dried and weighed and the content of the coarse fibers can be calculated by subtracting the weight of ash. The fiber screen bag and the method can be used by scientific research institutions, analysis and detection institutions, feed plants and the like to rapidly determine the content of the coarse fibers of feed, grains, oil and food on a large scale, and can also be used for rapidly determining neutral detergent fibers (NDF), acid detergent fibers (ADF), celluloses, hemicelluloses, dietary insoluble fibers, lignin and the like on a large scale. Compared with the traditional national standard method, the method has the advantages that the method is suitable for large-scale rapid determination, the efficiency is high, the time is short, the precision and the accuracy are high, the cost is low, and equipment such as any fiber determination instrument, filter and suction filtration devices and the like are not required. The fiber screen bag has the advantages that the bag is not floated, the weight is not lost, the moisture is not absorbed, the bag is not broken, the ash does not exist and the like when solvents such as acid, alkaline, acetone and the like are used for treatment.

The invention relates to a reactor simulator, in particular to a uniform inner heat source simulator of a medical isotope production solution reactor, comprising a power simulation part and a fissiongas simulation part, wherein the power simulation part comprises a heating component and a heat exchange component, and the fission gas simulation part comprises a bubble generation device and simulation gas. The invention really reflects power distribution of fuel solution in the reactor, efficiently simulates power distribution of a prototype reactor, strictly controls occupied flow area of an electric heating element without causing great influence on natural convection heat exchange of the solution by the electric heating element, solves the problems of high simulation power and small cross section of the electric heating element in the prior art and satisfies the experimental requirements. In addition, nitrogen gas is used as the simulation gas so that the safety of an experiment is ensured.

The invention discloses a high salt water zero discharge treatment system. The high salt water zero discharge treatment system includes a forward osmosis concentration system and a draw solution regeneration system. The forward osmosis concentration system includes a forward osmosis membrane component, which is used for receiving a concentrated draw solution of the draw solution regeneration system and a to-be-treated solution, and performing osmosis treatment to obtain a diluted draw solution and a concentrated solution. The draw solution regeneration system includes a high pressure reverse osmosis system, the forward osmosis membrane component is communicated with the high pressure reverse osmosis membrane component, the high pressure reverse osmosis system is used for providing the concentrated draw solution to the forward osmosis membrane component and receiving the diluted draw solution in the forward osmosis membrane component, the draw solution regeneration system also includes a sea water desalination system, which is assembled in the high pressure reverse osmosis system, and is used for treating the clear solution in the high pressure reverse osmosis system to obtain concentrated water and a final product and returning the concentrated water to the high pressure reverse osmosis system.

The invention provides a method and a device for testing the thermal contact resistance of joint surfaces between cylindrical sleeve walls. According to the method and the device, an outer-ring test piece, an inner-ring test piece and a calibrated copper ring are orderly nested and connected to each other to create a one-dimensional steady-state heat conduction environment with conduction in the radial direction of the ring-shaped test pieces. Temperature sensors arranged in different radiuses in the radial direction are used for measuring the temperatures in different radiuses of each test piece; the measured temperature values of the two test pieces are fitted by use of a numerical method and pushed out to the contact joint surfaces to obtain temperature drop at the contact joint surfaces; the heat flux density at the contact joint surfaces is obtained by use of the measured temperatures of the calibrated copper ring and according to a radial one-dimensional heat conduction line heat flux density formula per unit length; finally, the thermal contact resistance of contact joint surfaces is obtained on the basis that the thermal contact resistance is the reciprocal of the contact heat conduction; meanwhile, the heat conductivity coefficient of the inner-ring and outer-ring test pieces also can be obtained according to the law of radial one-dimensional heat conductivity coefficients.

The invention relates to a hydrofoil blade top gap and attack angle adjusting system for a water tunnel experiment and belongs to the technical field of water conservancy and hydropower engineering. The system is composed of a water tunnel observation section (1), fixing boards (3), locating nuts (4), supporting rods (5), a locating block (6), a hydrofoil connecting rod (7), an attack angle adjusting nut (8) and an elastic sealing structure. The two fixing boards (3) are spaced at a certain distance and fixed to a fixing face of the water tunnel observation section (1). The two supporting rods (5) are perpendicularly fixed to the two fixing boards (3) respectively, penetrate through through holes in the two ends of the locating block (6) and are located through the locating nuts (4). The smooth end of the hydrofoil connecting rod (7) penetrates through the fixing face of the water tunnel observation section (1) and is sealed through the elastic sealing structure and the threaded end of the water tunnel observation section (1) penetrates through the locating block (6) and is fixed through the attack angle adjusting nut (8). Compared with an existing system, the system is simple and compact in structure, capable of saving space, easy to move and detach, low in manufacturing cost and good in sealing performance.

The invention relates to a concrete test piece forming die capable of adjusting a steel bar position and a forming method. The forming die comprises a bottom plate, two opposite side plates and two end plates arranged oppositely, and the side plates and the end plates are fixed on the periphery of the bottom plate; the end plates comprises end plate supports and T-shaped adjusting regions, and theT-shaped adjusting regions comprises adjusting area bases and adjusting area bosses extending from one sides of the adjusting area bases; the adjusting area bosses are inserted into the cavities of the end plate supports in the Z-axis direction, and end plates with basically flat inner sides are formed; the T-shaped adjusting regions are formed by connecting a plurality of T-shaped positioning pieces arranged in the X-axis direction in parallel, or through the T-shaped positioning pieces and T-shaped clamping plates arranged and matched at intervals in the X-axis direction; and the middle parts of the T-shaped positioning pieces are provided with reinforcing steel bar positioning holes with axes arranged in the Z-axis direction, and the steel bar positioning holes of the two oppositely-arranged end plates are arranged correspondingly.

A method for measuring a coaxial error of thru-beams is disclosed. In the invention, by using a beam splitter prism, a two dimension translation adjuster, an angle reflector, a light intensity detector and an observation screen, a coincidence error of two thru-coincidence lights can be measured. By using the method, equipment is simple; observation is easy; measurement is convenient; coaxial adjustment of the thru-beams is fast, convenient, accurate and reliable.

The invention relates to a device and a method for measuring the Biot coefficient of a poroelastic medium under high temperature and high pressure. The experimental device comprises an autoclave, a pore pressure pump system, a confining pressure pump system, a computer control system, a heating system, a temperature control box and the like, wherein the computer control system is connected with the pore pressure pump system, the confining pressure pump system and the autoclave respectively; a first vent valve and a second vent valve are mounted on the autoclave; the other end of the confining pressure pump system is connected with the autoclave; the other end of the pore pressure pump system is connected with the autoclave; the heating system covers the outer side of the autoclave; the temperature control box is connected with inside and outside of the autoclave respectively. With the adoption of the device and the method, the problem about test of the Biot coefficient of a rock core under the high temperature condition is solved, the temperature pressure condition of the rock core in the stratum can be more really restored, and more guidance is achieved for field application. Main equipment adopted by the device is obtained through renovation based on original normal-temperature triaxial experimental equipment, so that the cost is greatly saved, and the experimental requirements can be met.

The invention discloses a novel multifunctional dual-luciferase reporter gene plasmid. The plasmid contains a luc firefly luciferase gene, a Rluc renilla luciferase gene, a SV40 poly(A) termination signal part and two independent multiple cloning sites, wherein the two independent multiple cloning sites are located on the upstream and the downstream of a luc firefly luciferase gene coder frame respectively. The dual-luciferase reporter gene plasmid containing detection gene and reference gene is successfully constructed, not only can the detection gene be transferred into a subject cell conveniently, but also the reference gene can be taken in correspondingly, the complexity of experiment operation and experiment errors are greatly reduced, the plasmid has the multiple cloning sites at thetwo ends of the firefly luciferase gene, the multiple cloning site located on the upstream of firefly luciferase can introduce a promoter sequence which can be used for genetic transcription adjustment, control and detection, and the multiple cloning site located on the downstream of the firefly luciferase can introduce a 3'UTR sequence which can be used for miRNA target identification, so that switching of different application of the same plasmid is achieved.

The invention relates to a diamond anvil cell zirconium-base amorphous alloy seal pad which comprises the following chemical components in atomic percents (at.%): 55-66% of Zr, 8-11% of Al, 5-19% of Ni and 7-30% of Cu. The preparation method comprises the following steps: putting the raw materials into a non-consumable arc-melting furnace, heating to 2000 DEG C to smelt to form an alloy ingot, repeatedly smelting 2-7 times, putting the alloy ingot into a silica tube, heating for resmelting in a high-frequency electromagnetic induction furnace, injecting into a copper mold filled with a copper wire core, cooling in an argon atmosphere, separating the copper mold, and taking out the copper wire core to obtain the amorphous alloy seal pad. The amorphous seal pad is filled into a diamond anvil cell to align the sample cavity with the center of the anvil table, and then the sample, a pressure transfer medium and a scalar pressure medium are put into the sample cavity to carry out pressurization and depressurization experiments. The invention is simple to operate, does not need to make a hole, eliminates the influence of the back bottom on the experimental result, and enhances the reliability and precision of the experimental result.

The invention discloses a safe transportation device for high-pressure combustible experimental gas and a gas supply method thereof. The device comprises a combustible experimental gas cylinder, an inert gas cylinder, a filter, a pipeline pressure reducing valve, a manual stop valve, a pneumatic stop valve, a pressure transmitter, a vacuum pump, a pressure gauge, a vacuum gauge, an electromagneticvalve, a combustible gas detector, a combustible gas alarm controller, a metal pipeline and the like. The device can be used for: 1) transporting the combustible gas to experimental equipment safely;2) adjusting the gas pressure in full range during the using process; 3) supplying gas continuously or intermittently for laboratory equipment; 4) conduting air tightness inspection to the equipmentbefore the experiment and supplying gas for cleaning tail gas after the experiment; 5) replacing the high-pressure gas cylinder safely and conveniently; 6) detecting combustible gas concentration in real time to maintain laboratory safety. With good air tightness, high cleanliness, high durability and safety reliability, the transportation device and method provided by the invention can meet the requirements of continuous gas supply and intermittent gas supply for the laboratory equipment.

The invention discloses a grinding device for a biological tissue. The grinding device comprises a grinding table with a mechanical transmission case, wherein the grinding table is provided with a grinder, the grinder comprises a pair of base and upper cover, which are identical in shape and size, a plurality of concaved grinding cavities which are regularly arranged are formed in the upper surface of the base, each grinding cavity is in a semicircular ball-socket shape or a semi-elliptic ball-socket shape, and a circular grinding ball is arranged in each grinding cavity; a plurality of concave cavities with quantity identical to that of the grinding cavities of the base are formed in the upper surface of the upper cover, the concave cavities correspond to the grinding cavities of the base in position distribution, when the upper cover is turned to be connected with the base, the concave cavities of the upper over and the corresponding grinding cavities of the base are closed to form a plurality of circular spherical or elliptical spherical closed spaces, the biological tissue and the grinding balls are wrapped by the closed spaces, after the base and the upper cover are fixed by utilizing a clamp, the base is connected to the upper surface of the grinding table through a sliding part, and the upper cover is connected with a drive device in the mechanical transmission case through a crank linkage mechanism; a drawer for storing an ice box is arranged in the grinding table below the grinder.

The invention an experimental apparatus and method for preparing a natural gas hydrate rock sample via two-step process; the apparatus according to its technical scheme comprises a cold storage, a reactor, a confining pressure pump, a gas supply system, a computer data collection system and the like; all experimental systems are positioned in the low-temperature cold storage, and cold storage temperature is adjusted through a temperature control system of the cold storage; the output end of the confining pressure pump is connected with the reactor; the output end of the gas supply system is connected with the reactor; a gas flowmeter and a temperature sensor are connected with the computer data collection system. The method for preparing the natural gas hydrate rock sample via two-step process comprises the steps of first, generating hydrate in a rock sample; second, decreasing methane gas pressure to around phase equilibrium pressure but slightly higher than phase equilibrium pressure so that the hydrate is recrystallized. By using the apparatus and method, the problem in the preparation of natural gas hydrate rock samples is solved, a hydrate rock sample closer to an actual hydrate reservoir in physical mechanical characteristic can be acquired, and experimental support is provided for the drilling and development of natural gas hydrate resources.

The invention discloses a sandwich pressing sample preparation mold and method for epoxy resin. The sample preparation mold is formed by aligning and stacking a bottom mirror panel, a bottom film, a middle thickness-calibrating mold, an upper film and an upper mirror panel , a cavity is provided in the middle of the intermediate thickness interlayer. Described sample preparation method is as follows: one, the base film is placed on the base mirror panel, and then the intermediate thickness interlayer is placed on the base film; Two, inject epoxy resin in the mold cavity of the intermediate thickness interlayer with a syringe; 1. Cover the upper layer of film, and gradually cover it from one side to the other during the process of covering the film. If there are air bubbles, drive the air bubbles to the edge of the mold to get rid of them; 4. Cover the upper mirror panel; Slowly put it on the preheated flat vulcanizer for pressurized time-sharing solidification, and after it cools down naturally, demould and take out the sample. The samples prepared by the invention have high quality and uniform thickness, and samples with any thickness can be prepared, which greatly reduces the interference factors in the measurement process.

The invention discloses an experimental device for a vortex-induced vibration piezoelectric energy harvester in water flow and a use method of the experimental device. The experimental device comprises an experimental platform and experimental piezoelectric energy harvesting devices. The experimental platform comprises a water tank support, a water tank, a honeycomb, a damping net, a drainage baffle plate, a water inlet pipe, a water return pipe and the like. The water flow sequentially flows a water inlet area, an experimental area and a drainage area from left to right, and the flow velocityof the water flow in the water tank can be adjusted by the aid of a water inlet valve, a water return valve and the drainage baffle plate to obtain a stable laminar flow field environment. Accordingto the piezoelectric energy harvesting devices, excited permanent magnets are embedded into flow around circular cylinders to introduce nonlinear magnetic force, resonance bandwidth, namely resonanceflow velocity range can be effectively extended, resonance can be generated within different flow velocity ranges, and experimental exploration requirements are met. A low-flow-velocity stable laminarflow field can be effectively simulated, the flow velocity is accurately adjusted, and various experimental data can be measured at different flow velocities by the aid of the energy harvesting devices with various structures.

The invention relates to a preparation method of a biological ceramic scaffold material. The method for preparing the ZrO2 bone repair biological ceramic scaffold material through gradient dip-coating of HA comprises the following steps: (1) carrying out first-time dip-coating of slurry; and (2) carrying out second-time dip-coating of slurry, and carrying out cooling to obtain the bone repair biological ceramic scaffold material. Nanometer ZrO2 particles are added into HA, so that the compressive strength and the tenacity of the scaffold material are enhanced, and therefore, the bone repair biological ceramic scaffold with high porosity, large compressive strength and strong toughness is provided for bone defect treatment. The biological ceramic scaffold material has high porosity and suitable hole diameter, so that hydroxyapatite can be easily degraded and absorbed, the bone tissue can grow inwards easily, the fusing speed is high, the bonding with host bone is firm, the obvious foreign body reaction can not occur, the biocompatibility is good, and moreover, the biological ceramic can be used for bone tissue damage repair and also can be used for in-vitro cell culture.

The invention discloses a six-degree-of-freedom electro-hydraulic vibration table active disturbance rejection control method. The six-degree-of-freedom electro-hydraulic vibration table comprises three horizontal valve-controlled cylinder mechanisms, three vertical valve-controlled cylinder mechanisms, an upper platform and a lower platform. The method comprises acquiring the position, the velocity and the acceleration signal of each hydraulic cylinder piston rod in the six valve-controlled cylinder mechanisms, calculating a generalized disturbance compensation signal, and adjusting the driving signals of the valve-controlled cylinder mechanisms by using the generalized disturbance compensation signal so as to improve the control precision of a vibration table system. The control method provided by the invention can reduce the fluctuation of the amplitude-frequency characteristic of a lateral-degree-of-freedom acceleration closed-loop transfer function from 12dB to less than 3dB in the frequency band of 50 Hz, and obviously improves the control precision of the six-degree-of-freedom electro-hydraulic vibration table. The method has an operation cycle less than 1ms and can satisfythe experimental requirements of a vibration simulation system. Thus, the method is easy to be implemented through computer numerical control.