2545results about How to "Improve experimental efficiency" patented technology

The invention discloses a detection system for the total number of bacteria in livestock meat. The detection system comprises a light source apparatus emitting a spot light source to irradiate a livestock meat sample, a hyperspectral imaging apparatus used for acquiring spectral information of the livestock meat sample, an electric adjusting apparatus used for adjusting the position of the livestock meat sample and the position of the hyperspectral imaging apparatus, a controller apparatus used for controlling the motion of a motor of the electric adjusting apparatus, a sensor apparatus used for determining the position of the livestock meat sample and the position of the hyperspectral imaging apparatus and outputting position signals, a computer processor used for receiving the position signals, outputting processed position signals to the controller apparatus, analyzing hyperspectral information of the livestock meat sample and outputting analysis results and a dark box used for placement of the hyperspectral imaging apparatus. According to the invention, automatic real-time detection and real-time outputting of detection results are realized, experiment efficiency and accuracy are improved, obtained results are more reliable, and an operation method of the detection system is simple.

The invention discloses a device and a method for testing a low-permeability core starting pressure gradient at the high temperature and the high pressure with an unsteady state method. The method comprises steps as follows: a to-be-tested low-permeability core sample is prepared and placed in a core holder; an automatic water pump is used for providing required confining pressure and return pressure for the core holder; a third valve is closed, and a gas pressurization device is used for pressurizing a standard bottle; after a second pressure sensor stably reads, the third valve is opened, and gas in the standard bottle permeates an inlet of the core holder; a controller records a pressure value, changing over time, read by the second pressure sensor and stops recording until the change rate of a reading number of the second pressure sensor is lower than a threshold value; and the core starting pressure gradient is calculated according to the reading number, changing over time, of the second pressure sensor. According to the device and the method, all that is required is to add a high-precision pressure sensor at an outlet of the standard bottle for recording pressure of the outlet, the high-precision pressure sensor has characteristics of low cost, high test precision, large range and the like, and the measurement problem of low flow speed is solved.

The invention provides a multi-angle object water entry and wave-making motion experimental device, which is a novel water entry experimental device with various water entry modes, a controllable water entry angle and a controllable water entry speed. The device is applied to water and underwater wave-making experiments when a model has a different immersion depth. The device of the invention is composed of an experimental water tank, a driving system, a power cabinet, a control system and a high-speed camera system, wherein the driving system is composed of a supporting frame, a horizontal experimental table, a vertical experimental frame and an angle connector, and the angle connector is connected with the horizontal experimental table and the vertical experimental frame, thereby realizing linkage of a horizontal motion and a vertical motion of the system and adjusting a structure water entry depth. Through respectively controlling speed values of the horizontal experimental table and the vertical experimental frame, oblique water entry, variable speed water entry and wave-making motion experiment can be realized. The device has the advantages of various experimental means, high result accuracy, high device utilization rate, high equipment adaptability and the like.

The present invention discloses a multi-camera in-loop simulation test method facing panoramic vision perception. The method comprises the steps of: establishing a target traffic scene model by employing an industrial personal computer, collecting panoramic image data by a camera, uploading the panoramic image data to a display screen, performing location parameter calibration of the camera by employing a sensor calibration module, performing feature point detection and matching and retaining effective matching pairs to complete image stitching and fusion, employing a target panoramic perception algorithmic routine to perform vision perception of the environment around a vehicle in real time, and finally, performing comparison and verification of the perception result obtained through thepanoramic perception algorithm and all the panoramic image data of virtual modeling to analyze the panoramic perception algorithm to obtain an in-loop simulation test estimation result. The multi-camera in-loop simulation test method facing panoramic vision perception generates a target panoramic image based on a virtual scene, the system provided by the invention comprises complete virtual traffic scene information to automatically perform image real information and perception information verification to perform estimation so as to greatly reduce human cost, consider the human marking errorsand improve the accuracy of estimation of the perception information result.

The invention belongs to the technical field of biology, and particularly relates to an analysis method of genomic DNA (deoxyribonucleic acid) fragment editing precision applicable to a CRISPR / Cas9 (clustered regularly interspaced short palindromic repeats / CRISPR-associated nuclease 9) system, and application of the analysis method. The analysis method is characterized in that a cutting manner of Cas9 nuclease to genomic DNA double strands is divided into blunt end cutting and protruding end cutting; a cutting end ratio corresponding to a blunt end cutting manner is a blunt broken end ratio; a cutting end ratio corresponding to a protruding end cutting manner is a protruding broken end ratio; and editing precision of candidate sgRNA (small guide ribonucleic acid) combinations and the selected Cas9 nuclease to genomic DNA fragments is predicted by predicting corresponding broken end sequences of the candidate sgRNA combinations in each cutting manner and combining the blunt broken end ratio and the protruding broken end ratio. With the adoption of the analysis method, precision prediction can be first performed on an editing method and a complicated experiment can be saved, so that the experiment efficiency is improved.

The invention discloses an omega-transaminase mutant and an encoding gene and preparation method thereof. The amino acid sequence of the omega-transaminase mutant is shown in SEQ ID NO.2 or SEQ ID NO.4 or SEQ ID NO.6 or SEQ ID NO.8 or SEQ ID NO.10. The nucleotide sequence of the omega-transaminase mutant is shown in SEQ ID NO.1 or SEQ ID NO.3 or SEQ ID NO.5 or SEQ ID NO.7 or SEQ ID NO.9. The invention further discloses an expression box, recombinant plasmid and converter containing the gene. Mutation site prediction is conducted on a wild omega-transaminase mutant through the combination of a temperature factor (B-factor) and the energy optimizing strategy, then site-specific mutagenesis is conducted, and the omega-transaminase mutant is prepared. The thermal stability of the selected mutant is higher than that of wild transaminase.

The invention relates to a teaching experiment device for an aircraft navigation, guidance and control technology, comprising a missile-borne controller, a real-time task management subsystem, a missile body structure, an electric rotary table, a user interface subsystem and a student experiment PC (Personal Computer), wherein all the modules are connected and communicated by adopting a serial port, a digital I / O (Input / Output), an Ethernet or radio, and the like; the missile-borne controller can be arranged in the electric rotary table or the missile body structure and is communicated with the real-time task management subsystem through the radio or the serial port; and the missile-borne controller and the real-time task management subsystem realize the configuration of experimental resources, such as an inertial measurement unit, a steering engine, the digital I / O, an equivalent device, the serial port, a network port, and the like, through the design of software and hardware. The teaching experiment device not only has the experimental functions for a module carrying out the principle demonstration of an aircraft, a sensing device module, an actuating mechanism module, a missile-borne controller module, a control system synthesis module, and the like, but also can be used as an experimental platform for a user to carry out independent design and research; and in addition, the teaching experiment device has the advantages of simple and compact structure, low cost, complete content, high function integration degree, easiness and convenience for operation, wide applicationscope, and the like.

The invention provides a multi-state undisturbed soil column infiltration simulation system and an unsaturated osmotic coefficient determination method. The simulation system comprises a bottom member, one or more soil column experiment standard members which are connected onto the bottom member and a multi-strength rainfall infiltration device arranged at the top of the soil column experiment standard members; a soil filling member of the simulation system is composed of a plurality of standard members and is automatically controlled by a computer; the determination of a rainfall infiltration coefficient and an osmotic coefficient is realized based on the system and testing steps and a calculation method are provided; in a determination process, a large-diameter undisturbed soil column is used for an indoor experiment and the multi-strength rainfall infiltration device is used for simulating three types of strength rainfall infiltration boundary conditions, such as low-strength rainfall whole infiltration boundary condition, a middle-strength rainfall radial flowing infiltration boundary condition and a high-strength rainfall stable infiltration boundary condition; and the multi-state undisturbed soil column infiltration simulation system has the characteristics of strong practicability, good utilization effect and convenience for popularization and utilization.

The invention relates to an automatic driving environment perception-oriented small sample in-loop learning system and method. Algorithm training is carried out on a target learning model based on a data training set to obtain a target detection algorithm; small sample training set training learning is carried out on the physical ECU module, and a target perception algorithm is obtained; target algorithm testing of the system is carried out through the obtained target perception algorithm. The system comprises a sample input module, an image acquisition module, an image display module, a physical ECU module and a result output module. According to the automatic driving environment perception-oriented small sample in-loop learning system and method, learning method based on small-scale datais provided, the arranged in-loop experiment simulation platform is matched with simulation software to solve the problem that large-scale data are difficult to obtain in real vehicle automatic driving environment perception algorithm development; the scene self-definition function is achieved, a large number of scene data which are difficult to achieve in actual situations are generated throughsimulation, and the experiment development safety is improved.

The invention relates to the technical field of unconventional oil and gas reservoir damage evaluation, and discloses a device and a method for evaluating the damage degree of a working solution to a tight reservoir. The device comprises an upstream standard chamber, a downstream standard chamber, a core holding unit, a confining pressure pump, a needle valve, a vacuum pump, a constant-flux pump, a working solution intermediate container, a formation water intermediate container, a differential pressure gauge, a confining pressure gauge and the like. Evaluation on the damage degree of liquid permeability after a core of the tight reservoir is polluted by the working solution is realized via a differential pressure time variation parameter in a liquid pressure pulse attenuation process by an unsteady-state liquid pulse method; the experimental process efficiency is high; concerned experimental parameters are few; the current low-efficiency method for testing a damage rate of the liquid permeability by a steady-state method can be replaced; effective development of an unconventional oil and gas reservoir is facilitated; and the device and the method have certain popularization prospects.

The invention relates to a liquefied natural gas (LNG) drain diffusion and pool fire combustion simulated experimental platform and an LNG drain diffusion and pool fire combustion simulated experimental method. The platform comprises an experimental system, a testing system and a control system, wherein the experimental system consists of an LNG storage tank, heat-insulation pipes, experimental devices and an anti-explosion isolating wall; the testing system consists of an electronic balance, an ignition system, a methane concentration detector, a thermocouple tree, a data acquirer and a camera; and the control system consists of a programmable logic controller (PLC) system, various display instruments and a control valve. By designing an angle-adjustable LNG surface spreading experimental device with a changeable surface material, spreading and gasification diffusion experimental simulation of LNG on surfaces of different substances and at different flowing speeds can be carried out; and by matching the ignition system and the methane concentration detector, LNG gas cloud concentration change monitoring and gas cloud ignition can be realized, and data and images are acquired automatically. The platform has the advantages of short experimental time, low cost, high experimental efficiency and the like. By the design, experimental steps are less, experimental safety is guaranteed under the condition of severe monitoring and control, the platform is easy and convenient to operate, and experimental repeatability is high.

The invention discloses a reaction device for simulating migration and transformation of a soil organic pollutant, relates to a reaction device, and solves the problem that existing leaching experiment equipment for simulating the migration and transformation of the soil organic pollutant is large in experimental error, low in equipment use ratio and poor in adaptability The reaction device comprises a first water box, a second water box, a water pump, a water inlet pipe, a steady flow pipe, a support, a supporting frame, a base, a fixed plate, a first regulating valve, a second regulating valve, multiple flowmeters, multiple sieve hole plates, multiple earth pillars and multiple fifth regulating valves, wherein the first water box, the support and the supporting frame are all arranged on the base; the fixed plate is connected with the supporting frame, and the second water box is supported through the supporting frame; the supporting frame is provided with the multiple earth pillars which are vertically arranged, each flowmeter is arranged right above each earth pillar, the multiple flowmeters are fixedly arranged on the fixed plate, and the sieve hole plates are fixedly arranged on the support. The reaction device disclosed by the invention is used for simulating the migration and transformation of the soil organic pollutant.

The invention discloses a testing device for simulating the permeability rule of a low-permeability horizontal well and a testing method. The testing device comprises a constant-flux pump, intermediate containers, a cylindrical rock core clamper and a pressurizing device. A cuboid rock core is arranged in the cylindrical rock core clamper. A horizontal circular hole is formed in the opposite angles of the rock core along the long edge, and a horizontal injection well and a horizontal production well are simulated. An injection end is arranged in an inlet of the horizontal injection well. A production end is arranged in an outlet of the horizontal production well. The constant-flux pump is connected with the input ends of the intermediate containers. The output ends of the intermediate containers are connected with the injection end. The testing method utilizing the testing device for simulating the permeability rule of the low-permeability horizontal well comprises the following steps that 1, a rock core is prepared; 2, water saturation is carried out on the artificial rock core; 3, a pipeline and a device are connected, simulation formation water is injected into the first intermediate container, simulation oil is injected into the second intermediate container, and the rock core achieving water saturation is placed in the rock core clamper; 4, oil saturation is carried out; 5, water drive operation is carried out. The testing device is simple in structure, convenient to use and high in testing efficiency.

The invention relates to the field of high-temperature corrosion of liquid metal and particularly relates to a rotary dynamic metal corrosion testing device and a using method thereof. The device is provided with a gas path and sealing system, a temperature control and reactor system and a lifting and rotating system, wherein the gas path and sealing system mainly comprises a vacuum pump, a resistance type vacuum gauge, a gas mixing device and a gas flow controller; the temperature control and reactor system mainly comprises heating elements, a temperature measuring element, an artificial intelligent temperature controller, a heat resistant steel experiment cavity, an experiment cavity upper sealing cover and glass lining; the lifting and rotating system mainly comprises a stepping motor, a sliding slipway, a ball screw, limiting stoppers, a rotary rod and a sample holder. According to the device, the experiment environment atmosphere is controllable through the extrusion sealing mode of metal and a high-temperature rubber ring, the experiment temperature is accurate and controllable through intelligent temperature control, the relative movement of a sample and a corrosive medium (liquid metal) is realized through the mode that rotary motor drives an agitator arm to rotate, and high-temperature dynamic corrosion experiment is realized under the simple dynamic equipment composing condition.

The invention discloses a method for preparing a deep sub-micron device sample for an in-situ transmission electron microscope. Ion beams are focused into ion beams with a small size for performing microdissection or grinding by utilizing an electromagnetic lens by adopting a focused ion beam system, accurate positioning sample preparation can be performed, and a deep sub-micron device is obtained. The method comprises the following steps: cutting and thinning the sample by adopting the focused ion beams so as to obtain a thinned sample, inclining a sample stage at 52+ / -(0.5-1.5) degrees relative to the finally thinned sample through conventional focused ion beams, and innovatively inclining the sample stage at 52+ / -7 degrees. The invention also provides a deep sub-micron device sample for the in-situ transmission electron microscope. The sample comprises multiple discrete nano devices which are regular in shape and have the width of less than 20nm and the thickness of less than 100nm. The sample is suitable for research on the in-situ transmission electron microscope and has the high significance in research on the performance of the deep sub-micron device.

The invention belongs to the technical field of light gas gun experiments, and particularly relates to a light gas gun driven through hydrogen and oxygen mixed gas detonation, in particular to a two-stage light gas gun driven through hydrogen energy. According to the technical scheme, the two-stage light gas gun driven through hydrogen energy comprises a combustor, a gas injection device, an ignition device, a pump pipe, a high-pressure cone section, a transmitting pipe, a target chamber and a magnetic speed testing device, wherein the ignition device is installed at one end of the combustor, the other end, opposite to the end with the ignition device, of the combustor is connected with the pump pipe, and a pump pipe membrane and a pump pipe membrane breaker are arranged at the junction; the gas injection device is used for injecting hydrogen, oxygen and inert gas into the combustor; a piston is arranged in the pump pipe; the large-diameter portion of the high-pressure cone section is connected with the pump pipe; the small-diameter portion of the high-pressure cone section is connected with the transmitting pipe, and a transmitting pipe membrane and a transmitting pipe membrane breaker are arranged at the junction; shots are arranged in the transmitting pipe, and one end of the transmitting pipe is located in the target chamber; and the magnetic speed testing device is installed at the tail end of the transmitting pipe and connected with an oscilloscope. The two-stage light gas gun is driven through hydrogen energy instead of gunpowder, damage to the gun is small, no particular product is generated, and a gun barrel can be cleaned conveniently after experiments.

The invention discloses a method and a device for determining saturation exponent of tight sandstone. The method comprises: according to nuclear magnetic resonance transverse relaxation time T2 spectrum of a core in a water saturation state and nuclear magnetic resonance transverse relaxation time T2 spectrum of cores in different water saturation states after different centrifugal forces are applied, determining geometric mean value of the nuclear magnetic resonance transverse relaxation time T2, the geometric mean value of the nuclear magnetic resonance transverse relaxation time T2 of the cores in different water saturation states after different centrifugal forces are applied on the cores, and water saturation of the cores after different centrifugal forces are applied; and according to the geometric mean value of the nuclear magnetic resonance transverse relaxation time T2 of the core in a water saturation state, and the geometric mean value of the nuclear magnetic resonance transverse relaxation time T2 of the cores in different water saturation states after different centrifugal forces are applied, and the water saturation of the cores after different centrifugal forces are applied, determining saturation exponent of the cores. The method and the device can accurately and efficiently determine the saturation exponent of tight sandstones.

The invention discloses an electromagnetically fixed and anti-loosening cement mortar stirring device and relates to the technical field of cement stirring. The device comprises a base, the inner bottom wall of the base is fixedly connected with an electromagnetic device I, and the inner wall of the right side of the base is fixedly connected with a piezoresistor electrically connected with the electromagnetic device I. According to the electromagnetically fixed and anti-loosening cement mortar stirring device, the electromagnetic device I and a dielectric plate are matched for use, when a clamping seat of a stirring barrel is placed in a mounting groove, a movable block contracts downwards under the action of the gravity of the stirring barrel, the dielectric plate reduces the relative area of a positive electrode and a negative electrode, the voltage of the circuit is smaller than the maximum path voltage of the piezoresistor, at the moment, a circuit of the electromagnetic device Iis connected, the movable block is contracted into the base under the magnetic attraction effect of the electromagnetic device I and the magnetic ring, the electromagnetic device I and a second magnetic block in the clamping base are magnetically attracted, the stirring barrel is tightly fixed to the base, and therefore the electromagnetic fixing effect is achieved, and the stirring barrel is effectively prevented from loosening.

The invention provides a device and method for synchronously testing pneumatic efficiency and power generation efficiency of a wind turbine. A base of the device is fixed in a wind tunnel test section, a power generator and a torque rotational speed meter are fixedly installed on the base, a first transmission shaft is connected with one end of the torque rotational speed meter, a wind wheel is fixedly arranged on the first transmission shaft, and the wind wheel is located at the upstream of the inflow direction of the wind tunnel test section; a second transmission shaft is connected to the other end of the torque rotational speed meter and fixedly connected with a motor shaft of the power generator; a power meter is connected with the power generator; the data output end of the torque rotational speed meter and the data output end of the power meter are connected with a computer; a sliding rheostat is connected between the power meter and the power generator, the power generator, the power meter and the sliding rheostat form a closed circuit, and the sliding rheostat serves as the load of the power generator. The method includes the steps that the wind wheel is driven to rotate at set wind speed; shaft torque and rotation speed of the wind wheel and output power of the power generator are measured; the measured data is transmitted into the computer to calculate pneumatic efficiency of the wind wheel and power generation efficiency of the whole wind turbine and the power generator.

The invention discloses a method for carrying out deceleration and monomolecular capture on a nucleic acid molecule based on a solid-state nano hole. The method comprises the following steps of: adding the nucleic acid molecule to be measured into a nano hole sequencing device filled with an electrolyte, wherein the nano hole sequencing device comprises an electrolytic bath provided with an anode and a cathode, and a solid-state nano hole thin film for separating the anode of the electrolytic bath from the cathode of the electrolytic bath; placing the nucleic acid molecule in a positive chamber of the electrolytic bath; during measurement, introducing a pressure external field into the positive chamber as a driving external field for the perforation of the nucleic acid molecule; applying a voltage between the anode and the cathode as an electric field external field reverse to the pressure external field; and in a measurement process, enabling the acting force of the pressure external field, from which the nucleic acid molecule is suffered in the nano hole to be more than or approximately equal to electric field force according to a deceleration purpose or a capture purpose to be realized by the method. By using the method, on the premise that the signal-to-noise ratio of a measurement signal is not decreased, the speed at which a DNA (deoxyribonucleic acid) molecule penetrates through a nano hole device can be effectively decreased, and a perforation speed can be slowed down for above one order of magnitude.

The invention discloses a small-size eddy type test tube vibrating and blending device. The device comprises a blending box, a stepper motor is mounted at the bottom of the blending box, a main shaft of the blending box is connected with a transmission shaft through a flexible coupling, a rotary planetary gear is fixedly mounted in the middle of the transmission shaft, a first sleeve is movably mounted at the upper end of the transmission shaft, three or more planetary gear supports are welded to the outer wall of the first sleeve, a second sleeve is welded to the other end of each planetary gear support, and the middle of each supporting shaft is movably connected with the corresponding second sleeve. According to the small-size eddy type test tube vibrating and blending device, the supporting shafts of test tube blenders are mounted on a planetary gear, due to the fact that the planetary gear is meshed with a fixed planetary gear arranged on the inner wall of the blending box and the rotary planetary gear on the transmission shaft at the same time, when the transmission shaft is driven by the stepper motor to rotate, the test tube blenders can be made to revolve around the transmission shaft at the same time of rotating around the supporting shafts connected with the test tube blenders, and thereby automatic, rapid and uniform blending of liquid sample test tubes is achieved.

The invention discloses a test system and a test method for an underwater explosion impact equivalent loading experiment. The test system comprises a bullet emission system, a bullet speed measurement system, a water target cabin system and a pressure measurement system, wherein the dynamic energy of a bullet is converted to an impact load in a water target cabin by colliding the bullet with the water target cabin system, finally the impact load is loaded on a test piece to be tested, and a pressure time interval is measured by the pressure measurement system. The test system and the test method disclosed by the invention are capable of greatly realizing equivalent underwater explosion equivalent loading in laboratory conditions, and has the advantages of being high in controllability, simple to operate, low in experiment danger, high in repeatability, low in experiment cost, and the like.

The invention relates to rhodamine derivatives and their preparation method and use. The rhodamine derivatives have a general formula I and can be utilized for determination of Fe<3+>. The preparation method of the rhodamine derivatives comprises that an intermediate produced by the reaction of rhodamine B and ethylenediamine is utilized as a raw material and undergoes a condensation reaction with acetylacetone or ethyl acetoacetate in the presence of ceric ammonium nitrate as a catalyst to produce the rhodamine derivatives. Results of an analysis of a mixed-ion interference-resistant iron-ion specific identification capacity of the rhodamine derivatives and an analysis of a living cell condition adaptation capacity of the rhodamine derivatives show that the rhodamine derivatives have strong iron ion specificity, a strong other cation-resistant capacity and a strong living cell condition adaptation capacity, wherein iron ion concentration detection sensitivity is 1*10<-6>; reaction stabilization time is 20 minutes; and a pH value of a Tris-HCl buffer solution is 5.5 or 6.0. The rhodamine derivatives can be utilized as iron ion induction agents for a non-invasive micro-metering system and realizes determination of Fe<3+> concentration, a Fe<3+> flowing speed and a Fe<3+> motion direction.

The invention relates to a device for simulating a sedimentation rule of a proppant in a complicated fracture network formed by volume fracturing. The device comprises a main fracture composed of a fence, second-grade fractures vertical to the main fracture and third-grade fractures which are parallel to the main fracture and are connected by the second-grade fractures. The whole structure of the device can sufficiently simulate fracture networks with different types of underground reservoir stratum so that the versatility of the device is added. The visualization of the device is good for tracking and observing an experiment phenomenon and recording data; and the experiment efficiency is extremely improved and the device is convenient to repair and maintain. A research result obtained by using the device has a certain reference value for volume fracturing theoretical researches and field application.

The invention discloses a large-size roadway support laboratory simulation system which comprises a large-size roadway support simulation system, a pressurizing transmission system and a support data acquisition system. The large-size roadway support simulation system consists of a large-size roadway appearance simulation mechanism and a support simulation mechanism. The pressurizing transmission system comprises a base, a lateral pressurizing transmission mechanism, an axial pressurizing transmission mechanism, a side pressure power system and an axial pressure power system. The support data acquisition system comprises an axial extensometer, a radial extensometer, a computer, an EDC digital controller and a pressurization controller. The end, exposed to the inside of a rubber ring, of each anchor rod is provided with a sound emission sensor. The invention further discloses a large-size roadway support laboratory simulation method. The system and the method can simulate underground roadway support effect, roadway side deformation and floor heave which are caused under pressure really according tot geological conditions of different mines and can also simulate state of creep instability of the roadway under disturbance.

An automatic microscopic imaging system for multi-cell culture process, which is used for automatic imaging and analysis of long-term cell culture process. The system has the functions of automatic observation target switching, automatic low-power light source lighting, auto-focus and image fusion, intelligent online analysis of cell growth status, and tracking imaging of interested imaging regions and moving cells. Including light source system, optical mechanism, building-type multi-layer cell culture observation mechanism, multi-axis servo system, automatic culture imaging system control mechanism, etc., can realize simultaneous cultivation and imaging of various cells without human participation for a long time.

The invention relates to an assessing test machine for tribological properties of a high polymer compound material. The assessing test machine comprises an airtight box and is characterized in that a transmission shaft is arranged on a box wall, wherein a shaft end of the transmission shaft extending out of the box is connected with a safety shaft, a torque meter and a servo motor in turn througha coupler; a rotating angle disc is mounted on the safety shaft; one end of the transmission shaft inserted into the box is connected with a sample shaft through a universal crossing coupler; an upper sample clamp and a lower sample clamp are arranged around the sample shaft; a force transfer rod is connected with the upper sample clamp; one end of the force transfer rod extends out of the box and is connected with a heat-insulating shaft, a pressure sensor and a hydraulic cylinder; and a displacement measuring rod, which is in contact with a displacement sensor, is mounted on an extending part of the force transfer rod. The assessing test machine has the advantages that: the real working condition of the high polymer compound material is simulated and an assessing test for the tribological properties of the high polymer compound material is performed for detecting the abrasion loss and the change in frictional factor following the time of the high polymer compound material in real time.

The invention discloses a method for reducing perforation speed of nucleic acid molecules in a nanopore sequencing method. The method comprises the following steps of: adding the nucleic acid molecules to be measured into a nanopore sequencing device filled with electrolyte, wherein the nanopore sequencing device comprises an electrolytic cell provided with an anode and a cathode, and a solid nanopore film for separating the anode from the cathode of the electrolytic cell; placing the nucleic acid molecules to be measured in a cathode cavity of the electrolytic cell,; and when the nucleic acid molecules are measured, applying the voltage between the anode and the cathode, and introducing a reverse external field taking a pressure intensity external field as an electric field simultaneously. According to the method, the pressure intensity external field is reversely applied under the drive of an additional electric field, so that the speed of DNA (Deoxyribonucleic Acid) molecules is reduced when the DNA molecules pass through the solid nanopore, and the speed is reduced by about 50% to 80%, thus the time resolution of a DNA unimolecule detection technology is greatly improved. The method has very bright application prospect on a solid nanopore DNA molecule sequencing device.

The invention relates to a multilateral well experimental model, a multilateral well experimental system and a sand filling method. Experimental sand is filled into the upper part of the multilateral well experimental model, and the lower part of the experimental model is used for simulating bottom water. A bottom water diffusion plate is arranged between the upper and lower parts. A layer of gauze element is arranged between the bottom water diffusion plate and the upper part of the experimental model. According to the multilateral well experimental model, the influence of edge water and the bottom water of an oil reservoir on the productivity of a multilateral well and the distribution of a near-well pressure field is effectively simulated under boundary conditions closer to various boundaries such as the bottom water, the edge water and enclosure in a real oil reservoir environment, so that the influence of different boundary conditions on the productivity of an oil well can be obtained.

The invention discloses a method and a device for detecting and selecting laser-induce enhanced Raman spectrum in a liquid. The method comprises the following steps of: focusing the inducing light on a suspending to-be-detected sample and forming a three-dimensional light well in liquid; enriching metal nanoparticles on the surface of the to-be-detected sample; and coinciding the focuses of exciting light and inducing light, thereby forming a laser-induce enhanced Raman signal. The realizing method disclosed by the invention is simple and convenient, is obvious in spectrum enhancing effect and is fit for quick detection for in-situ Raman spectrum of a biological sample under a liquid environment; the to-be-detected sample and the metal nanoparticles are hatched together; the method is especially fit for the field of quick detection for diseases, epidemic situation, food safety, and the like; the toxic damage to the biological sample caused by the metal nanoparticles is greatly reduced, so that the true physiological status of living cell can be extremely reflected; the optical tweezers formed according to the method provided by the invention can be used for sorting, extracting and eluting, can realize the function of identifying and sorting Raman spectrum of a single living cell, and is beneficial to the follow-up study on the biological sample.