67results about How to "Save money on experiments" patented technology

The invention provides a finite element analysis method for formula racing car frames, belongs to the technical field of computer aided engineering, and aims at solving the problem that existing racing car frame optimization and analysis are bad in correctness and long in design period. The finite element analysis method comprises the following steps of: A, constructing a three-dimensional model and carrying out meshing to convert the three-dimensional model into a finite element model; B, applying boundary conditions according to each working condition, carrying out finite element analysis and calculation on frame bending rigidity under each working condition, and comparing the analysis result with material bending strength to carry out structure optimization; C, respectively applying forced displacement in opposite directions on two sides of the car frame, carrying out finite element analysis and calculation to obtain torsional rigidity of the car frame, and carrying out structure optimization according to the analysis result; and D, analyzing and comparing whether a fixed frequency of each order modal of the car frame is different from an external main excitation frequency or not, and carrying out structure optimization according to the result. According to the method, the correctness of optimization and analysis is improved, the expenditure is decreased and the design period is shortened.

The invention relates to a downhole confining pressure abrasive material jet flow simulation experimental device and method. The downhole confining pressure abrasive material jet flow simulation experimental device comprises a confining pressure barrel. A nozzle installation adjustment component is arranged at the left end of the confining pressure barrel. A test-piece clamping component is arranged at the right end of the confining pressure barrel. A pressure meter used for measuring the pressure in the confining pressure barrel and a safety valve used for decompression are arranged on the wall of the confining pressure barrel. A visual nozzle and lighting nozzles are arranged at the top of the confining pressure barrel, and the center hole of the visual nozzle and the center holes of the lighting nozzles are communicated with the confining pressure barrel. A sapphire high-pressure resistant lens is installed at the bottom end of the center hole of the visual nozzle in a sealed mode. A high-speed camera directly facing the sapphire high-pressure resistant lens is arranged in the visual nozzle. Optical fiber light sources are installed in the center holes of the lighting nozzles in a sealed mode. A material storage tank is communicated with the bottom of the confining pressure barrel. A closed cavity is formed by the confining pressure barrel and the material storage tank. The material storage tank is installed on a base. The invention further provides a downhole confining pressure abrasive material jet flow simulation experimental method. According to the scheme, the problems that an existing experimental device is low in pressure bearing capacity and inconvenient to operate and the experimental process is not observed clearly are solved.

The invention discloses an adjustable working face dust simulation experiment device. The adjustable working face dust simulation experiment device comprises an air source area, an air inlet way, a working face and an air return way which are sequentially connected with one another, wherein the air inlet way, the working face and the air return way are splicing square plastic pipelines, the air source area comprises a small fan, a baffle board and an air source pipeline, the small fan is in seal connection with a wild opening of the air source area, the baffle board which can be vertically adjusted is arranged in the middle above the wide-opening pipeline to control air forces, and a plurality of small equidistant circular holes are arranged at the tops of pipelines of the working face, the air inlet way and the air return way.

The invention relates to a steering test bench of an electrical-closed tracked vehicle transmission device, which consists of three alternating current variable-frequency motors, three variable-frequency devices, three rotational speed and torque sensors, two multi-gear transmission boxes and a measurement and control system. The steering test bench is characterized in that: the three alternatingcurrent variable-frequency motors can realize four-quadrant work and realize the performance requirements on change of power flow direction of an inner track during the steering process of a tracked vehicle; the test bench is fully electrical-closed, and power absorbed by a loading motor can be used for a driving motor, thereby greatly reducing energy loss; the steering test bench can eliminate the impacts of self-inertia torque of a loading device and improving the loading precision; and the driving motor can simulate the working rotational speed property of an engine, and the loading motor can simulate the loading property of a road surface, so that the test bench can simulate the actual working condition of the tracked vehicle transmission device.

The present invention discloses a modeling method for an abnormal aging fault of a photovoltaic component. The modeling method comprises the following steps: firstly constructing a photovoltaic component model according to a 5-parameter mathematical physics model of a solar cell; establishing a photovoltaic string model based on an M file in the MATLAB according to the photovoltaic component model, simulating the specific influence of the abnormal aging component on the string, and drawing an I-V characteristic curve; and according to the photovoltaic string, constructing a photovoltaic array simulation model to simulate the influence of the abnormal aging component on the entire column. Beneficial effects of the method disclosed by the present invention are that the influence of the abnormal aging component on the entire photovoltaic string and the photovoltaic array can be studied by establishing a photovoltaic array simulation model, particularly a photovoltaic array model with an abnormal aging component, and more intuitive understanding can be brought about, so that convenience is brought to guide the practical experiments, and necessary help is provided to the fault diagnosis method by using the photovoltaic array characteristic curve.

The invention discloses a test piece for fracture toughness of III type cracks. The test piece is a rectangular flat-plate test piece; the length of the broad edge is more than the thickness and less than the length of the long edge; initial cracks are symmetrically arranged on the two sides in the broad edge direction of a flat plate; symmetric V-shaped edge cutting grooves are formed in the two sides in the thickness direction of the flat plate. According to the test piece, the fracture toughness of the III type cracks of a plastic material can be effectively and stably tested and a test can be finished on a universal test machine.

The invention discloses a method for detecting pig viral diseases on the basis of TEM-PCR and a gene chip. The method comprises the steps that according to a target sequence, enriching multiplex-PCR, adopting four pairs of specific nested PCR primers and a probe, and adding a tag sequence which can be recognized by a pair of universal primers respectively on the 5 prime end of each inner primer. According to the method, a lot of defects of a traditional PCR method are overcome, the compatibility, specificity, flexibility and the like are all better than the traditional PCR method; the reaction conditions of Tem-PCR are optimized, and an efficient and accurate, and convenient and quick detection method is established; the background noise of the reaction is reduced, and the fund is greatly saved; an advanced Tem-PCR multiple amplification technology and a gene chip detection technology are combined for the first time, a system through which four etiologies can be detected on one piece of chip at the same time is established, and a foundation is laid for later molecular biology detection of important pathogenic microorganism.

The invention relates to a method for measuring and estimating muscle strength data of an aircraft pilot during gliding take-off. The method comprises the following steps: performing real-time dynamicmeasurement and collection on the acceleration and muscle strength of the aircraft pilot during curved surface gliding take-off by adopting an inertia measurement element integrating a Micro FET3 type muscle strength tester and a Mems micro gyroscope, performing data smoothing processing, and performing processing by adopting a least square method to obtain a relationship between the accelerationand muscle strength data; and resolving the horizontal acceleration and the vertical acceleration of curved-surface take-off by simulating different curved-surface runways and take-off acceleration conditions, performing synthesis to generate a resultant acceleration, and estimating the muscle strength data of the aircraft pilot according to the two relationships. The method has the advantages that the dynamic muscle strength data can be generated, besides, multiple experiments can be avoided, experiment expenditures are saved, an estimation result of the muscle strength data is obtained, andguidance is provided for aeronautic medical treatment and physical training of the aircraft pilot.

The invention discloses a multifunctional digital electronics technology course learning plate system. The multifunctional digital electronics technology course learning plate system comprises an input module, a combined logic module, a sequential logic module and an output module. Among the various modules, only power wires and ground wires are connected together, and unified power supply is realized. The input module comprises a switch value input, a manual clock generating unit and a continuous clock generating unit. The output module comprises an LED lamp and a seven-segment digital tube.The combined logic module comprises a gate circuit, a decoder, a data selector, an encoder, a numerical value comparator and an adding device. The sequential logic module comprises a trigger, a counter and a bidirectional shifting register. The multifunctional digital electronics technology course learning plate system has the advantages that experimental operation is facilitated; circuit connection time is shortened, circuit connection error probability is reduced, and students have more energy to understand, design and verify digital logic circuits; a learning plate can be multipurpose; andcommon 2.54 spacing inserting pin or wiring board or Dupont connecting wires are adopted, and thus, repair is facilitated.

This invention provides a specific nucleotide O-antigen for Escherichia coli 078, a complete sequence of nucleotide which controls the synthesis of O-antigen, e.g. as show in the SEQ ID NO: 1 the nucleic acid for separation has 12655 alkali bases, or compromising one or several insert, lost, or substitutes alkali bases, while keeping the function of the nucleic acid; It also compromises oligonucleotide which processing gene in the single-surge unit of O-antigen gene group form Escherichia coli; this invention proves that the oligonucleotide has a high specific function on Escherichia coli 078 by PCR, and discloses a method of identifying and detecting Escherichia coli by the oligonucleotide.

The invention relates to a wire icing experimental device under the natural state and belongs to the technical field of wire experimental devices. Four wheels and a magnetic field sensor are mounted at the bottom of a vehicle body of the wire icing experimental device; a water tank, a storage battery groove and a control box are arranged at the upper part of the vehicle body; a water pump is mounted at the upper part of the water tank; an upper arm is directly mounted on the vehicle body and is hinged to a lower arm; an atomizer is mounted at the top end of the upper arm and is hinged to an upper arm bracket. A storage battery provides electric energy for the whole system; the water pump pressurizes water and enables water to be ejected out of the atomizer. According to different sags of wires subjected to an experiment, an included angle between the upper arm and the lower arm as well as between the atomizer and the upper arm can be properly adjusted, and the atomizing direction and the atomizing height can be controlled. The wire icing experimental device assists icing of the wire subjected to the experiment in a water mist spraying manner, promotes the icing efficiency, improves the icing quality, is simple in structure, high in reliability, can be adapted to more hostile environments, and can effectively ensure safety of workers when replacing manual icing.

The invention discloses a micro-dialysis sensor which comprises a micro-dialysis membrane guide pipe (6), a micro-dialysis liquid guide pipe (5), a liquid inlet channel guide pipe (7) and a liquid outlet channel guide pipe (8), wherein the micro-dialysis membrane guide pipe (6) is positioned at the top end of the lower part of the micro-dialysis liquid guide pipe (5); the liquid inlet channel guide pipe (7) and the liquid outlet channel guide pipe (8) are positioned in the micro-dialysis liquid guide pipe (5); a needle electrode or a sensor is arranged in the micro-dialysis liquid guide pipe (5). The micro-dialysis sensor is applied to detecting biochemical substance concentration or electrophysiology, has the functions of observing the concentration index of the specific biochemical substance in real time and has the unparalleled advantage for tests in which detection data are required to be rapidly acquired; the micro-dialysis sensor has the function of collecting micro-dialysis liquid, can be used for detecting and verifying other later-stage biological indexes and has the function of detecting electrophysiological function signals in real time, so that an experimenter can simultaneously know the coordination of the electrophysiological and biochemical functions.

The invention provides a pre-existing crack offset three-point bending test device for testing fracture toughness of the II type crack. The device comprises a sample, a lower end clamp, an extensometer, a hammer, and support rollers. Two support rollers are horizontally placed on the lower end clamp and are on the same horizontal plane. The sample is supported on the support rollers, and is a rectangular parallelepiped. The support points of the two support rollers and the sample are symmetrical about the longitudinal central axis and 1.4W from the longitudinal central axis. The bottom surfaceof the sample is provided with two pointed bayonets and V-shaped open slots symmetric about the longitudinal central axis. The distance between the two pointed bayonets is the standard range of the extensometer. The sharp point of the bayonet on the left side is flush with the tip of the corresponding V-shaped open slot, and the tips of the V-shaped open slots are provided with pre-existing cracks. The V-shaped open slots are vertically upward, and are 0.7W from the longitudinal center axis. The pointed bayonets are 1W from the longitudinal center axis. The distance between the pre-existing crack center line and the support rolls on both sides is 1:3. The knife edge of the extensometer is clamped onto the two pointed bayonets. The hammer is placed on the top of the first sample and is inthe same vertical line with the pre-existing crack.

The invention discloses a primary isolated culture and induced differentiation method for precursor fat cells in adult yak muscles. The method comprises the steps of disinfection treatment and segmentation, digestion, screening and filtration, centrifugation, purification and culture. According to the cell culture for the precursor fat cells in the adult yak muscles, provided by the invention, manpower and material resources can be saved, and the limitation of high pollution rate caused by using newborn calf fat tissues and primary cells in a traditional culture method is broken through, so that the source approach of samples is wider, and a large number of cells can be obtained at the same time; and the culture method is a convenient and efficient precursor fat cell culture method, provides a molecular basis for subsequent in-depth research on gene and protein expression, signal channels and the like in proliferation and differentiation process of intramuscular precursor fat cells, provides a new thought and a new method for research on fat deposition, fat metabolism, fat mobilization and the like of different parts, and has an important significance in improving the meat quality of yaks.

The invention discloses a method for treating and cleaning corroded and oxidized surface defects, which relates to the technical field of steel production, and comprises the following steps: soaking a defective sample in an HCl solution, taking out, washing with clear water, soaking in a NaOH solution, washing with clear water, and deeply cleaning the sample by using an ultrasonic cleaning machine. The method is simple and convenient to operate, low in time consumption and high in experiment efficiency, and is an effective method for treating and cleaning the corrosion and oxidation defect sample.

The invention provides an o-antigen-specific nucleic acid against bacillus coli of Shigella boydii 14. It is nucleotide total sequence of gene cluster controlling o-antigen synthetic, possesses several inserted, lost and substituted basic group and also comprises oligonucleotide. Oligonucleotide of the invention has high specificity against o-antigen of bacillary dysentery of B14-style. The invention also discloses method to detect and attest bacillary dysentery of B14-style using oligonucleotide.