103results about How to "Reduce experimental error" patented technology

The invention provides a device and method for testing the fracture toughness of a Charpy-like impact sample in a low-temperature environment, and the device comprises an environment box system which is used for providing a low-temperature test environment; the frame system is located in the environment box system, the sample is located in the frame system, a boss is arranged at the bottom of the frame system, and the bottom end of the boss is an arc surface; the loading system comprises a pressure head and a lower guide rod, the lower guide rod is upwards inserted into the environment box system, the pressure head is downwards inserted into the frame system, the boss is located above the lower guide rod, the sample is located below the pressure head, and a notch of the sample is located on a connecting line of the pressure head and the center of the bottom end of the boss; and the measuring system is used for measuring test data. A low-temperature test environment is provided through the low-temperature test box, the purpose of testing the fracture toughness of the Charpy-like impact sample in the low-temperature environment can be achieved, and the device has the advantages that clamping is convenient in the test process, automatic centering is achieved, and the test error is small; meanwhile, test material consumption is reduced, and cost is reduced.

The invention discloses a quantitative evaluation method for the adhesion of aggregate based on a water boiling method, and aims to solve the technical problem that the adhesion performance of asphalt and aggregate tested by the water boiling method can only be evaluated qualitatively and cannot be quantified. The quantitative evaluation method comprises the following steps: 1, carrying out a water boiling test on the adhesion performance of the asphalt and the aggregate by adopting a water boiling method; 2, shooting by adopting an industrial camera to respectively obtain images of four side surfaces coated with the asphalt aggregate and images of four side surfaces of the boiled asphalt aggregate; 3, unifying the background color of the side image, and then eliminating a reflective area on the surface of the aggregate through a two-stage reflective removal method to obtain a reflective-removed aggregate image; and 4, calculating the asphalt peeling rate on the surface of the aggregate by calculating the areas of the four side surfaces of the aggregate and the asphalt peeling area. According to the method, the boiling method and the image processing method are combined, the highlight area of the image is eliminated through the light reflection removing algorithm, the asphalt peeling area can be accurately calculated through the image method, and therefore the adhesion grade of the aggregate can be accurately judged.

The invention relates to a triaxial test universal sample preparation and high-frequency vibration loading integrated device and method, the device comprises a main body loading frame, a sample preparation suite, a loading suite and a loader, and the loader comprises a voice coil motor; the main body loading frame comprises a supporting plate, a supporting rod and a loading ejector rod, a working space is formed between the supporting plate and the supporting rod, one end of the loading ejector rod is connected with the loader, and the other end of the loading ejector rod extends into the working space; a soil sample is placed in the sample preparation suite, and the loading ejector rod loads static force or surface vibration to the sample preparation suite; a sample prepared in the sample preparation suite is placed in the loading suite, and the loading ejector rod loads static force or power to the loading suite. Compared with the prior art, the sample preparation and loading of the triaxial test sample are realized through the sample preparation suite and the loading suite, and the operation is convenient; and the loader adopts electric loading, so that the problems of compactness, stable quality and the like during sample manufacturing can be solved, and the test error can be effectively reduced while manpower is saved.

The invention discloses a rock-soil seepage experiment device, and relates to the technical field of rock-soil seepage experiments, the rock-soil seepage experiment device comprises a test board, the test board is provided with a material storage box, a pressing plate is arranged above the material storage box, one side of the pressing plate is provided with a compaction assembly, the surface of the test board is provided with a transverse groove and a vertical groove, and the vertical groove is communicated with the transverse groove. According to the rock-soil seepage experiment device, the adjusting motor drives the threaded rod and the compaction plate to move up and down, the initial height of the compaction plate and the storage box can be accurately adjusted, so that personalized compaction treatment can be performed on rock-soil of different types and humidity, the adjustability ensures that the compaction strength is not excessive or insufficient, and the compaction efficiency is improved. The flexibility and the accuracy of the experiment are improved; the compaction treatment ensures that the density and the compactness of the rock soil to be measured in the experiment process are kept consistent, and experiment errors caused by rock soil looseness or uneven density are remarkably reduced, so that the experiment can more accurately simulate actual geological conditions, and the reliability and the accuracy of experiment data are improved.

The invention belongs to the technical field of liquid engines, and discloses a liquid engine inner wall liquid film forming and visual diagnosis system which comprises a multifunctional spray pipe support and a calibration device, a liquid film forming device is arranged at the top of the multifunctional spray pipe support, and a visual spray pipe is arranged at the bottom of the liquid film forming device. According to the technical scheme, the liquid film forming device, the visual spray pipe and the multifunctional spray pipe support are arranged, when the liquid film forming device, the visual spray pipe and the multifunctional spray pipe support are used in a whole and matched mode, liquid film generation can be achieved, optical diagnosis can be conducted on the generated liquid film, and therefore a set of complete experimental research method is formed; an effective analysis means can be provided for a breaking mechanism of the liquid film in a high-temperature and high-speed airflow environment, the research blank is filled up, so that the understanding of breaking of the liquid film and generation of liquid drops is improved, and the initial flowing parameters of the liquid film can be accurately controlled and instability and experimental errors can be reduced through a method for forming the liquid film by impacting the wall surface through jet flow.

The invention discloses an anisotropic turbulence model modeling method based on turbulence pulsation speed and dissipation rate. The method comprises the following steps: establishing a pulsation speed transport equation; the turbulent flow kinetic energy equation and the turbulent flow dissipation rate equation are solved, and the numerical value of the turbulent flow dissipation rate in the flow field is obtained; solving the transportation equation of the pulsation speed to obtain the turbulence pulsation speed; constructing a viscosity coefficient of the turbulent flow according to the obtained turbulent flow dissipation rate and the turbulent flow pulsation speed; calculating each stress item of the turbulent flow by using the constructed turbulent flow viscosity coefficient; and substituting the obtained turbulence stress item into an average flow equation and a turbulence pulsation speed equation of turbulence to obtain the anisotropic turbulence model. According to the anisotropic turbulence model equation established by the invention, the numerical calculation precision of the turbulence boundary layer is improved, and the established anisotropic turbulence model equation only contains a unique artificial parameter, so that the experimental error caused by human factors can be greatly reduced, the result is more accurate, and the data is more persuasive.

The invention discloses a primer and probe combination for detecting a bulbus fritillariae cirrhosae medicinal material based on Taqman fluorescent probe double-marking linear correction quantitative PCR (Polymerase Chain Reaction). The invention further discloses a method for detecting the bulbus fritillariae cirrhosae medicinal material based on Taqman fluorescent probe double-marking linear correction quantitative PCR, the bulbus fritillariae cirrhosae specific primers and probes designed based on six bulbus fritillariae cirrhosae-based original plant conserved gene sequences and the 18sRNA universal reference gene primers and probes are adopted, a sample to be tested and a standard reference substance are amplified at the same time in a PCR reaction system, and the specific primers and probes are used for detecting the specific genes of the bulbus fritillariae cirrhosae medicinal material based on Taqman fluorescent probe double-marking linear correction quantitative PCR. The method comprises the following steps: qualitatively confirming that a test sample contains the bulbus fritillariae cirrhosae component according to amplification results of a bulbus fritillariae cirrhosae specific primer and a probe, then taking a standard reference substance as a template to obtain two standard curves of a bulbus fritillariae cirrhosae specific gene and a 18sRNA gene, and finally quantitatively analyzing the bulbus fritillariae cirrhosae content in the test sample by adopting a double-marking linear correction method. The method can be used for efficiently, specifically and accurately detecting the ingredients and content of the bulbus fritillariae cirrhosae through PCR.

The invention relates to the technical field of biological medicine, and discloses a titer determination method of a specific immune globulin neutralizing antibody, which comprises the following steps: step 1, preparing a cell maintenance fluid; 2, preparation of a virus solution for neutralization: diluting viruses (cytomegalovirus, syncytial virus and EV71 virus) to 100CCID50 by using a diluent according to the virus titer; step 3, diluting the test sample: carrying out double series dilution on the intravenous injection human immune globulin, the tetanus human immune globulin, the rabies human immune globulin and the human immune globulin until no cytotoxicity exists; 4, diluting a standard substance; 5, virus back dripping; step 6, neutralizing viruses; step 7, preparing cells for the test; step 8, infection; and 9, judging a result. According to the present invention, the accurate detection on the titer of the neutralizing antibody of the specific immune globulin can be achieved, and the cytotoxicity influence of the test sample and the fringe effect during the detection process can be removed so as to ensure the detection accuracy.

The invention belongs to the field of rock physical test devices, and particularly relates to an in-situ CT scanning-based ultralow-temperature high-pressure seepage and deformation test device and method.The sample device comprises a rock core clamping system, a seepage injection system, a confining pressure system, a back pressure system, a pressure acquisition system and a temperature control system, the rock core clamping system comprises a titanium alloy double-layer rock core holder and a heat-shrinkable sleeve for wrapping a rock core, and the rock core clamping system is fixed on a rotary objective table of the CT scanning system through a clamp; the seepage injection system comprises a gas phase injection pump; the backpressure system comprises a backpressure control pump; the confining pressure system comprises a nitrogen confining pressure pump; the pressure acquisition system comprises a computer and a Keller differential pressure sensor; the temperature control system comprises a Dewar flask. The method comprises a seepage test method and a deformation test method. According to the device and the method, a transient method permeability test and a pore water frost heaving-rock matrix cold contraction nonlinear coupling deformation test at ultralow temperature can be performed, and a theoretical basis is provided for construction of an underground liquefied natural gas reservoir.

The invention relates to the technical field of electrical equipment state evaluation, in particular to a power cable insulation material detection device and a thermo-oxidative aging detection method.The power cable insulation material detection device comprises a high-temperature aging oven used for simulating the high-temperature environment where an insulation material is located; the temperature control equipment is used for controlling the temperature in the high-temperature aging box; the oxygen supply equipment is used for supplying oxygen into the high-temperature aging box; the clamp is used for clamping and fixing a detected insulating material sample, clamping the detected sample through the clamp and placing the detected sample in the middle of the high-temperature aging oven, oxygen is supplied to the high-temperature aging oven through the oxygen supply equipment, the temperature in the high-temperature aging oven is controlled through the temperature control equipment, and the temperature in the high-temperature aging oven is controlled through an aging experiment in a short-time high-temperature and oxygen environment. And the aging characteristic of the cable material can be evaluated in a short time.

The utility model discloses a paddy field sampling soil impurity removal device which comprises a treatment box, the treatment box comprises an impurity removal box, a feeding port is formed in the upper end of the impurity removal box, an adjusting assembly is arranged in the impurity removal box and comprises a detection box, a humidity sensor is arranged in the detection box, an adjusting box is arranged at the lower end of the detection box, and the humidity sensor is arranged in the adjusting box. A fixed seat is arranged on the end side of the adjusting box, a control motor is arranged on the fixed seat, a positive and negative tooth screw rod is arranged at the output end of the control motor, a shaft seat is arranged on the positive and negative tooth screw rod in a sleeving manner, a rotating motor is fixedly arranged on the shaft seat, and a crushing roller is arranged at the output end of the rotating motor. And the arranged humidity sensor is matched with the driving motor, the left-right distance between the smashing rollers can be automatically adjusted according to the soil humidity, the distance between the smashing rollers is adjusted according to the soil humidity, caked soil can be more effectively smashed, and therefore the impurity removing efficiency is improved.

The invention provides a tissue slice patch preparation method based on a tissue chip. The tissue slice patch preparation method comprises the following steps: mixing raw materials to prepare a receptor wax block, collecting a tissue core and transferring the tissue core to the receptor wax block to form a fused wax block, cooling the fused wax block, storing the fused wax block, and carrying out operations of pre-cooling correction, slice unfolding and slice baking. According to the tissue chip-based tissue slice patch preparation method, the tissue chip can be better protected, and the integrity of the tissue chip is ensured.

The utility model discloses a water quality standard solution titration device, including first container, liquid passage, solution container, water pump, control valve, flowmeter and colority detection subassembly, liquid passage is provided with two at least, and the one end of each titration tube is inserted to the above of first container, the liquid in solution container is made to flow into the liquid passage with the one end of each liquid passage away from titration tube intercommunication, water pump is communicated with liquid passage, and the liquid in solution container is dripped into first container under the drive of water pump through liquid passage and titration tube, control valve is arranged on titration tube, and colority detection subassembly is arranged above first container, water pump can drive solution to drip into first container through liquid passage and titration tube, replaces manual solution and drips into first container, realizes the automation, reduces the experimental error because of manual multiple comparison color, simplifies the operation procedure, and reduces the manual cost.

The application discloses a vehicle aerodynamic simulation model correction method and device, electronic equipment and medium, and relates to the technical field of vehicle simulation. Wherein, by establishing the mapping relationship between the actual flow field and the simulation flow field and calculating the difference data set, then using the physical field inversion algorithm to obtain the target correction factor distribution of the to-be-corrected parameter in space, and combining the flow state characteristic quantity to train the machine learning model to obtain the target correction function, finally embedding the function into the solver to realize the bottom correction of the vehicle aerodynamic simulation model. In this way, the problem of inaccurate vehicle simulation of the vehicle aerodynamic simulation model is fundamentally improved, the corrected simulation model has spatial adaptive ability, can automatically apply differential correction according to local flow characteristics, significantly reduces the error between simulation and test, avoids the problems of product performance not meeting the standard, design change and cost waste caused by simulation deviation, and greatly improves the accuracy and robustness of simulation.

The invention discloses a preparation method of carbon black standard pollution cloth, which comprises the following steps: (1) boiling off sample cloth which is subjected to desizing treatment and cut according to requirements at high temperature, carrying out secondary desizing treatment, and finally ironing the sample cloth to be dry; (2) preparing a carbon black pollution solution, namely uniformly mixing the following components in parts by mass: 1.05 to 1.15 parts of peregal O-25, 1.9 to 2.1 parts of carbon black powder, 5.9 to 6.1 parts of gum arabic powder, 6.9 to 7.1 parts of sodium carboxymethyl cellulose and 1250 to 1300 parts of soft water, so as to prepare a basic pollution solution, wherein the basic pollution solution is prepared from 1.05 to 1.15 parts of peregal O-25, 1.9 to 2.1 parts of carbon black powder, 5.9 to 6.1 parts of gum arabic powder, 6.9 to 7.1 parts of sodium carboxymethyl cellulose and 1250 to 1300 parts of soft water; and then adding soft water preheated to 60-65 DEG C into the basic pollution liquid until the pollution liquid reaches 2000 parts by mass, thereby obtaining the carbon black pollution liquid, (3) sample cloth dyeing: adding soft water into the carbon black pollution liquid to prepare a diluted pollution liquid; pouring the diluted pollution liquid into an enamel plate, clamping the sample cloth with tweezers, and immersing the sample cloth into the diluted pollution liquid from the front end of the enamel plate for pull dyeing; and clamping the dyed polluted cloth for steaming, and then putting the steamed polluted cloth into a moisture-proof cabinet for drying.

The invention discloses a pressure-controllable clamping and dipping device and method for rock sample cementing treatment, and belongs to the technical field of rock sample tests. The device consists of a radial centering pressurizing module, an independent heating container and a hydraulic control system, the independent heating container and a saucepan with a built-in thermometer are fixed on a base, and a heating wire is arranged at the bottom of the base. An annular hydraulic oil groove is integrated in the base and connected with an internal pushing rod through multiple sets of hydraulic oil pipes, a sample contact plate is installed at the tail end of the pushing rod, and a supporting block is arranged on the outer side for positioning. The radial centering and pressurizing module is erected above the circumferential centering and pressurizing module; and an internal pushing rod is connected with the pressure transmission plate and the sample contact plate. A manual hydraulic pump is connected with an oil pump pressurization connector through a quick connector, a hydraulic oil pipe is provided with a high-precision pressure gauge and a control valve, a separator is laid in a sample contact area, and all the components cooperate to achieve cementing treatment of a rock sample at constant temperature and constant pressure.

The utility model provides a kind of spotting positioning device for cell culture multi-well plate, the spotting positioning device includes the lower layer bottom plate and upper layer spotting positioning rectangular frame of parallel arrangement;The lower layer bottom plate is also equipped with and is used for supporting the support column of spotting positioning rectangular frame;The top surface of the lower layer bottom plate is formed with the multi-well plate limiting slot for placing multi-well plate;The upper layer spotting positioning rectangular frame is formed with rectangular work window;The spotting positioning device further includes replaceable spotting positioning strip, the spotting positioning strip is formed with several array spotting holes, the spotting positioning strip is erected on the upper layer spotting positioning rectangular frame so that spotting hole is located in rectangular work window;Positioning scale for identifying or assisting positioning spotting positioning strip position is equipped on the upper layer spotting positioning rectangular frame.The spotting positioning device of the application is simple and easy to operate, low in cost, and has high parallelism between multiple holes, suitable for general laboratory applications that do not require excessive samples and have low budgets.

The invention discloses a gas adsorption and thermodynamic intelligent sensing test system and method for different component materials, and belongs to the technical field of material adsorption and thermodynamic experiments, the system comprises a data set module, an experiment sensing module and an adsorption-desorption and thermodynamic coupling model unit, and the method comprises the following steps: S1, material element analysis; s2, constructing an adsorption-desorption and thermodynamic coupling model; s3, acquiring field experiment parameters; s4, obtaining an experiment result; s5, obtaining a data table, a data graph and data fitting in combination with an experiment result obtained in the step S4, and exporting data; according to the invention, the adsorption and desorption and thermodynamic experiment of the multi-component material can be completed, and an idea is provided for exploring the adsorption and desorption and thermodynamic experiment rule of the multi-component material.

The invention discloses a cement soil core sample curing device, which belongs to the technical field of cement soil curing, and comprises a curing tube, which is divided into a display end, a curing chamber and an adjustment end along its own axis; a display is arranged on the side wall of the display end; a temperature and humidity monitoring sensor is arranged on the inner wall of the curing chamber; a temperature and humidity adjustment system is arranged in the adjustment end; and the temperature and humidity monitoring sensor is electrically connected to the display and the temperature and humidity adjustment system respectively. The invention has a simple structure, is light and portable, is easy to operate, and has strong practicality. It can be applied to the curing stage from the construction site to the laboratory, maintains the state of the cement soil core sample unchanged, reduces the influence of the external environment on the strength of the core sample, and improves the test accuracy.

The invention discloses an irradiation test device, and particularly relates to the technical field of fireproof coating testing, the irradiation test device comprises a test box, irradiation equipment and a sample mounting seat, the test box is provided with a box door, the irradiation equipment is mounted in the test box, the sample mounting seat is rotatably mounted on the box door, and the sample mounting seat is provided with a plurality of groups of sample mounting grooves; a sample leveling assembly is further arranged in the test box and comprises a positioning compression roller and a leveling supporting frame, the positioning compression roller is installed on the leveling supporting frame, the leveling supporting frame is installed in the test box, and the positioning compression roller is vertically arranged. The sample mounting seat is controlled to rotate, so that the positioning compression roller is gradually contacted with each sample, and the outer walls of the samples extruded and fixed by the positioning compression roller are positioned in the same plane, so that the distances from the outer surfaces of coating layers to irradiation equipment are relatively uniform, the test error is reduced, the test precision is improved, and the test efficiency is improved. And more accurate test data can be obtained.

The invention discloses a device for rapidly detecting podocytosis, and relates to the technical field of biomedical detection. In order to solve the problems that at present, detection of podocytosis mainly depends on kidney biopsy, is traumatic and complex in operation, causes great pain to a patient, and the operation process is complex and needs to be executed by professional medical personnel; however, urine-based podocyte detection avoids biopsy wounds, but generally needs tedious sample treatment steps and professional laboratory equipment, and is not beneficial to rapid screening and diagnosis of diseases. Urine and blood samples are adopted for detection, trauma of kidney biopsy is avoided, the sample treatment and detection process is simplified, the detection time is shortened, the detection efficiency is improved, multiple markers are detected at the same time, the detection accuracy and sensitivity are improved, and by means of marker verification and concentration analysis, the detection accuracy and sensitivity are improved. And a detection report is generated, so that the detection result is more intuitive, and rapid screening and diagnosis of diseases are facilitated.

The application discloses a novel CO2 displacement and throughput system and method. The system can carry out simulation researches on carbonized water displacement, gas injection, water-gas alternating injection displacement, CO2 throughput and the like of oil and gas reservoirs. Under the conditions of formation temperature and pressure, the displacement or throughput development effects of various gases and the like on the underground oil and gas reservoirs are researched, and the effects of the displacement or throughput development of the gases, steam or carbonized water and the like under different conditions, and the influence law of the sensitive factors such as displacement amount, displacement rate, temperature and pressure on the displacement development effect and the throughput development effect are analyzed. The application has the advantages of fast operation control speed, high efficiency, small error and convenient system pipeline cleaning; the modular design is adopted, the application can be widely applied to various research fields according to different experimental targets, and the sensitive factors influencing the displacement effect or the throughput development effect are researched, so as to guide the improvement of the oil and gas reservoir development effect.

This application belongs to the technical field of pentaangular prism equipment and discloses an anti-polarization pentaangular prism, including a mounting base. A support rod is fixedly connected to the upper surface of the mounting base. A cylinder and a motor are fixedly connected inside the mounting box. A telescopic rod is movably connected to the output end of each cylinder. A rotating rod is provided at the output end of the motor. The rotating rod extends through a connecting hole to the outside of a fixed plate. A mounting rod is fixedly connected to the side of the fixed plate away from the mounting box. A mirror body is provided on the outside of the suction cup. The experimenter can control the operation of the cylinder and the motor through the control panel. First, the cylinder is controlled to move the telescopic rod installed at its output end to a suitable measurement position. The mechanical rotation and mechanical extension can improve the accuracy of the experimental measurement and the stability of the anti-polarization effect measurement. At the same time, the light reflected by the mirror body can be projected onto the measurement plate after exiting the mirror body, which facilitates the collection and analysis of the measurement results by the experimenter.

The invention discloses a fixing device for a concrete slab explosion test, which comprises a fixing seat, and the fixing seat comprises a first supporting unit and a second supporting unit which are detachably arranged; first clamping assemblies are arranged at the top ends of the first supporting unit and the second supporting unit; the fixing base is further provided with a monitoring unit and a blasting assembly fixing unit. The free end of the blasting assembly fixing unit can be close to or away from the fixing base, the second clamping unit comprises a first clamping assembly and a second clamping assembly which are detachable, and the second clamping assembly can move in the vertical direction of the first clamping assembly; the device can effectively simulate the real clamping and stress conditions of the two ends of a concrete slab in a building under the action of an explosion load, greatly improves the accuracy of an anti-explosion performance loading test of the concrete slab with the two ends clamped and supported, meets the test of different to-be-tested assemblies at the same time, and improves the test efficiency. The test efficiency is improved and the cost is reduced.

The invention provides a simple evaporation system for rapidly measuring hydraulic parameters of unsaturated soil. The simple evaporation system comprises a weighing sensor, a sample preparation cylinder outer cylinder, a soil sample, a chassis, a first tensiometer, a second tensiometer, a third tensiometer, a wireless transmitting collector, a power transmitting module, a power receiving module, a transparent organic glass box and an evaporation control system. According to the simple evaporation system for rapidly measuring the hydraulic parameters of the unsaturated soil, the initial saturation state of the bottom of a sample can be accurately judged according to the measured value of the bottom tensiometer, and the measurement and calculation errors are reduced by comparing the measured values of the bottom plate tensiometer with the measured values of the other two height tensiometers; a temperature and humidity control system is adopted to accurately and actively control the evaporation rate of the sample surface; the soil sample and the sample preparation cylinder are connected by adopting a special glue solution, and the soil sample can be evaporated in a thermal environment and cannot be separated from the sample preparation cylinder under the action of strong cementation, so that the overall structure uniformity of the soil sample in the whole test process is maintained.

The viscometer lifting device comprises a bottom frame, a guide rod is vertically fixed on the bottom frame, a lifting sleeve is arranged on the guide rod in a sliding manner, a locking rod for locking the sliding of the lifting sleeve is arranged on one side of the lifting sleeve, and a plurality of grooves matched with the locking rod for locking are formed in one side of the guide rod; a speed regulating rod is further movably arranged on the lifting sleeve, a speed regulating button is fixed to the end, extending out of the lifting sleeve, of the speed regulating rod, the other end of the speed regulating rod is sleeved with a gear, and the guide rod is provided with a rack matched with the gear; a clamping jaw is arranged on one side of the lifting sleeve. The viscometer is stably clamped by the device, self-locking is convenient in the experiment process, the viscometer is more stably lifted and can accurately reach the required height, and the stability and the accuracy of the experiment are greatly improved.

The method comprises the following steps of: determining an approximate arraying position by combining the number of incoming wave signals and the wavelength of incoming waves according to a signal arrival destination and an available terrain, further adjusting a part of unreasonably arrayed array elements according to the terrain, and then calculating to obtain accurate and reasonable position coefficients of other array elements of a sparse array; carrying out difference processing on the sparse array position coefficient, and removing redundancy in combination with the existing non-uniform array position to obtain all virtual difference synthesis array position information; calculating a covariance matrix of the non-uniform array and performing vectorization processing, and then performing redundancy elimination and sorting on the data to obtain partial single-snapshot virtual array information; performing data processing on the single-snapshot virtual differential synthesis array information to obtain a signal correlation matrix; due to the influence of coherent signals, de-coherence processing is carried out on a signal correlation matrix for the first time; and an improved spatial smoothing algorithm is adopted again to further reduce the influence of coherent signals, and finally, a MUSIC spectral peak search algorithm is used to carry out DOA estimation on single-snapshot virtual differential synthesis array information.

The efficient air supply device with the flow equalizing effect comprises a shell and a flow equalizing plate, the shell is a box with an opening in the bottom, the opening in the bottom forms air outlet, an air inlet is formed in the top of the shell, and the air inlet is located in the middle of a top plate of the shell; the flow equalizing plate is arranged in the shell, the shape of the flow equalizing plate is the same as that of the cross section of the shell, and the flow equalizing plate is in close contact with the inner wall of the shell; the flow equalizing plate is divided into a high-speed area, a medium-speed area and a low-speed area from the center to the periphery; and the apertures of the through holes in the high-speed area, the medium-speed area and the low-speed area are gradually increased. According to the efficient air supply device, airflow entering from the air inlet is changed into airflow with the uniform speed distribution at the air outlet, the stable and uniform airflow environment of a rear working chamber is guaranteed, and the operation stability of precision equipment or the data accuracy of experimental equipment is guaranteed.

The present invention discloses a method and system for scheduling an automatic test of an electric energy meter. The scheduling decisions of existing automatic scheduling technologies lack timeliness and accuracy, and it is difficult to achieve efficient automatic test scheduling. The method of the present invention includes: obtaining electric energy meter information, constructing a real-time status model of the test equipment, calculating the priority of each test task according to the real-time status of the test equipment and the urgency and importance of the test task, and ensuring that high-priority test tasks are processed first; combining a multi-level adaptive hybrid optimization strategy, dynamically adjusting the test sequence of the tested samples, selecting the optimal test task and updating the test equipment status by calculating the time and state influencing factors, and performing feedback adjustment; and comprehensively evaluating all completed test tasks and the automatic test scheduling of the test equipment. The present invention improves the automation level and intelligence level of scheduling, and improves the overall efficiency of the electric energy meter test.

The application discloses an in-situ environmental device suitable for in-situ loading and heating of metal materials and relates to the field of material mechanical property testing.The device comprises a shell base, a sample clamping assembly, an environmental cavity, a loading mechanism, a force sensor, a heating assembly and a thermocouple, the environmental cavity is composed of a light transmission cylinder, a supporting cylinder and a supporting cylinder base, the heating assembly is installed on the bottom surface of an upper clamp and covers the periphery of a sample, the sample is locally heated through a silicon carbide heating sheet, the loading mechanism is arranged in the shell base to apply an axial load to the sample, the force sensor collects load signals in real time, and the thermocouple monitors the temperature of the sample area and feeds back to a temperature control unit.The device has compact structure and good imaging compatibility, and can realize in-situ testing and three-dimensional damage evolution analysis of metal materials under thermal-mechanical coupling conditions.