215results about How to "Improve experimental accuracy" patented technology

The invention provides a device and a method for measuring an axial diffusion coefficient of gas in a porous medium and belongs to the field of oil-gas field development. The device comprises a constant temperature oil bath (1), and a holder (2), a container (16) and a high pressure gas cylinder (11) which are arranged in the constant temperature oil bath (1), wherein a lead sleeve (4) is arranged in the holder (2) and is in a cylindrical structure of which two ends are open; a plug (3) is arranged at one end of the lead sleeve (4), and a plug (7) with a valve is arranged at the other end of the lead sleeve (4); an outer cylindrical surface of the plug (3) and an outer cylindrical surface of the plug (7) with the valve are in sealing contact with an inner surface of the lead sleeve (4); a sample cavity is formed in an inner cavity of the lead sleeve (4) between the plug (3) and the plug (7) with the valve; a porous medium (5) is arranged in the sample cavity.

The invention relates to a fire experiment simulation device in a narrow and long limited space, and the device comprises a simulation cabin, a first thermocouple unit, a second thermocouple unit, a smoke collecting system and a computer control system, wherein the length-width ratio and the length-weight ratio of the simulation cabin are (10-8):1 respectively, and a fire generation device is arranged at one end part of the bottom surface of the simulation cabin; the first and second thermocouple units are arranged on one side surface of the simulation cabin; the computer control system is used for collecting temperature and smoke gas information in the simulation cabin and performing data analysis; the first thermocouple unit comprises a plurality of thermocouples which are horizontally arranged in the positions close to the top of the cabin along the length direction of the simulation cabin; and the second thermocouple unit comprises a plurality of thermocouples which are gradually arranged from top to bottom along the height direction of the simulation cabin in a loose manner. The invention establishes the fire experiment simulation device for researching the flashover mechanism in the narrow and long limited space for the first time, the device has a complete temperature measuring system and the smoke collecting system, the structure is reasonable in arrangement, and the experimental accuracy is high.

The invention discloses an SSR molecular marker method of a brassica allohexaploid and primers thereof. The SSR molecular marker method of the brassica allohexaploid comprises the steps: hybridizing a brassica allohexaploid parent, and performing microspore culture on the obtained filial generation to obtain a DH colony; extracting genome DNAs of the brassica allohexaploid parent and the DH colony, and performing PCR amplification with all genome DNAs as a template by using the primers; constructing a genetic map of the brassica allohexaploid parent according to a PCR amplification result, wherein 217 pairs of primers are included, with base sequences respectively shown in SEQ ID No. 1/2-433/434. According to the SSR molecular marker method, a first genetic map of the brassica allohexaploid is constructed, and the basis is provided for further performing QTL location and molecular marker assistant breeding.

The invention discloses a remote-sensing multi-angle ground observation device, which comprises a driving cart, a height-adjustable supporting assembly which is installed on the driving cart and is driven by a motor, an azimuth angle rotating base which is installed on the supporting assembly, an arc-shaped guide rail which is installed at the rotating end of the azimuth angle rotating base, and an instrument trolley which is installed on the arc-shaped guide rail. The lower part of the supporting assembly is connected with a tricycle base; one end of a cross bar is connected with a slideable supporting rod in the supporting assembly, the other end of the cross bar is connected with the rotating base for controlling the azimuth angle. and the rotating end, for realizing the azimuth angle control on the arc-shaped guide rail, at the lower part of the rotating base is connected with one end of the arc-shaped guide rail; a trolley platform which carries various instruments is installed on the arc-shaped guide rail. The remote-sensing multi-angle ground observation device can solve the technical problems that the existing equipment for omnibearing multi-angle observation of ground object bi-directional reflection, multi-angle infrared temperature and emissivity cannot obtain data quickly, the equipment is not light and portable and is required to be assembled on the spot, and multiple sensors cannot be carried on an observation platform at the same time.

The invention discloses a polarization measurement system of a smoke particle Mueller matrix, which belongs to the field of polarization detection and comprises an emission system, a beam splitting and polarizing system, a polarizing system, a smoke particle simulation system, a beam splitting system, a polarization detection system and a computer data processing system. The emission system, the smoke particle simulation system, the beam splitting system and the polarization analysis system are sequentially arranged on a main light path in the light beam transmission direction, the beam splitting polarization system and the polarization system are arranged on the same impeller, when the impeller rotates to a first position, the beam splitting polarization system is switched to enter the main light path in the light beam transmission direction, and when the impeller rotates to a second position, the polarizing system is switched to enter a main light path in the light beam transmission direction. According to the invention, the operation of adjusting the polarization element for four times in the traditional smog medium Mueller matrix test is replaced by the operation of screwing the impeller into the system for one time, so that the measurement of sixteen groups of Mueller matrixes can be completed, the operation steps are reduced, the error is avoided, and the experiment accuracy is improved.

The invention discloses a simulation experiment device for coal mine gas dynamic disaster under a simulation environment. The device comprises a loading frame, wherein a pneumatic hammer and two Z direction loading hydraulic cylinders are mounted on the loading frame, and a Z direction loading plate is connected between the bottom ends of piston rods of the two Z direction loading hydraulic cylinders; a Y direction guide rail and an X direction guide rail are connected to the bottom of the loading frame; a protruding cylinder body and a Y direction loading hydraulic cylinder are arranged on the Y direction guide rail, and an X direction loading hydraulic cylinder is arranged on an X direction motor trolley; a Z direction loading port is formed in the top of the protruding cylinder body, a Y direction cylinder and an X direction cylinder are connected to the side wall of the protruding cylinder body, and a protruding port is formed in the upper surface of the X direction cylinder; a fourth pipeline with an opened tail end is connected to the X direction cylinder; a vacuum-pumping system and a gas loading system are connected to the protruding cylinder body. The invention further discloses an experiment method using the device, coal mine rock burst, gas flow field, overlaying strata stress and horizontal tectonic stress can be simulated, the experiment simulation degree is improved, and the experiment success rate and the accurate degree are improved.

The invention relates to a novel physical experiment platform which comprises supporting legs, an operating table and an experimental tube; an upright post I is vertically arranged on the operating table; a cross beam I is fixedly arranged at the top of the upright post I; an angle scale is arranged at the end, far away from the upright post I, of the cross beam I; a connecting rod is arranged on the experimental tube and is connected with the center of the angle scale through a rotating shaft; a high-speed camera is arranged on the operating table; the experimental tube comprises a tube body, an elastic zone and an experimental ball; blades are uniformly arranged on the inner wall of the tube body; an object throwing device is arranged at the top end of the tube body; the bottom end of the tube body is detachably connected with the elastic zone through threads; the tube body is uniformly provided with photoelectric sensors; a power supply and a microprocessor are arranged inside the operating table; a liquid crystal operating screen is arranged on the surface of the operating table; a hydraulic column is arranged at the bottom of each of the supporting legs. The novel physical experiment platform provided by the invention has the benefits that through the high-speed camera, the photoelectric sensors, the microprocessor and other high-tech devices, the experimental accuracy is improved; through the blades in the experimental tube, the friction is effectively reduced, the interference factors are reduced, and the students' interest in physical experiment is improved.

The invention provides a method for analyzing the magnetic roasting effects of an iron ore having different granularity ranges. The method mainly comprises the following technological steps: 1, preparing an experiment ore sample and a reduction coal sample; 2, drying the ore sample; 3, uniformly spreading the ore sample and the coal sample on a clean roasting porcelain dish, sending to a box type electric resistance furnace, and carrying out magnetic roasting to obtain a roasted ore; 4, rapidly taking out the roasted ore, and carrying out water quenching cooling; 5, filtering the roasted ore obtained after the water quenching cooling; 6, drying the filtered roasted ore sample; 7, screening the dried roasted ore by grid sieves to form roasted ores respectively having granularity ranges of 0-1mm, 1-3mm, 3-5mm and 5-15mm, and respectively weighing; 8, grinding the roasted ores respectively having granularity ranges of 0-1mm, 1-3mm, 3-5mm and 5-15mm to 1-60 meshes; and 9, carrying out magnetic separation of the roasted ores respectively having granularity ranges of 0-1mm, 1-3mm, 3-5mm and 5-15mm. The experiment method has the advantages of high accuracy and few extraneous influence factors, and provides a basis for the selection of roasting conditions during the sieve fraction magnetic roasting of difficult-separation iron ores.

A liquid cargo ship collision experiment apparatus is characterized by including a pool, which is provided with a hit ship model and a hitting ship model inside, wherein the hit ship model is fixed inthe pool through a mooring rope, and a liquid cargo warehouse is arranged inside the hit ship model; the hitting ship model includes separate ship bows, a main ship body and a guide disc, the separate ship bows and the main ship body being connected through bolts; and a pressure sensor and a displacement sensor are arranged in the pool. The beneficial effects are that through a reasonable structural design and a reasonable program design, the hitting ship model is adjustable in tonnage, hitting angle, hitting speed and liquid cargo liquid carrier rate, so the liquid cargo ship collision experiment apparatus can be really applied to the liquid carrier ship manufacturing field, enables a conventional collision research method to be optimized and can improve accuracy of a model experiment.

The invention discloses an automatic temperature control system and method for a sample heat treatment process under ultrahigh vacuum, and belongs to the field of temperature control. The system comprises an optics thermodetector, a vacuum gauge, a computer and a current source, the optics thermodetector and the vacuum gauge are located in ultrahigh vacuum sampling heating equipment, an infrared thermodetector and the vacuum gauge are connected with the computer, the computer is connected with the current source, and the current source is connected with a sample. Temperature negative feedbackto current of the heated sample is utilized, thereby achieving simple, quick and accurate temperature control, an RS232 serial port is used for connecting various instruments, a temperature differencevalue between a sample temperature measured by the optics thermodetector and a preset sample temperature is calculated, and a PID algorithm is used for feeding back and setting the applied current onthe sample by the current source. Although different types of current is required for heating samples due to sizes, manufacture and the like, the system can accurately control the sample temperatureto a set temperature within 1 DEG C in half a minute.

The invention discloses a chemical flooding photoetching glass model microcosmic experiment device for natural gas hydrates and relates to the field of natural gas hydrate development. The device comprise a gas supply system, a liquid supply system, a simulation pore model system, a chemical flooding system, a production system and a monitoring system. In the device, photoetching glass is adopted to serve as the main body of the simulation pore model system, nature gas and water are injected into the simulation pore model system through the gas supply system and the liquid supply system so as to form the natural gas hydrates, a chemical agent is injected through the chemical flooding system so as to simulate chemical flooding exploitation, the products decomposed by the natural gas hydrates are collected through the production system, and the growth and decomposition parameters of crystals in the natural gas hydrate experiment process are collected through the monitoring system. The photoetching glass used in the device is made in the mode that plain glass is subjected to precise photoetching by using a photochemical etching technology according to the real pores of natural core casting body slices, the precision of the experiments is ensured, and a certain guidance effect on research on the natural gas hydrates is achieved.

The invention provides a preparation method and a failure analysis method of a bare chip taken from a flip chip. The preparation method of the bare chip taken from the flip chip comprises the steps ofproviding the flip chip, wherein the flip chip comprises a bare chip and a packaging structure for packaging the exterior of the bare chip, and solder balls are on the front surface of the bare chip;performing grinding on the packaging structure until the solder balls are exposed from the front surface of the bare chip; and performing etching on the front surface of the bare chip by adopting anacid spraying etching mode, removing the solder balls on the front surface of the bare chip and the residual packaging structure until the front surface of the bare chip is completely un-packaged to obtain a bare chip sample. According to the preparation method of the bare chip taken from the flip chip, removal of the packaging structure by acid boiling is not needed, instead, one part of the packaging structure is grinded off, and then the solder balls and the packaging structure on the front surface of the bare chip are removed by adopting the acid spraying etching mode, thereby obtaining the bare chip, without causing edge breakage or cracks; and when the bare chip is used for other experiments, influence of human factors to the bare chip can be eliminated, experiment accuracy can be improved, and an excellent technical effect can be achieved.

The invention discloses a high-grade biosafety protection type air propagation experimental device for pathogens of medium and small animals. The high-grade biosafety protection type air propagation experimental device can be used for carrying out a droplet propagation experiment on the medium and small animals such as rats, mice, martens and rabbits. The high-grade biosafety protection type air propagation experimental device comprises a biosafety cabinet, wherein the biosafety cabinet comprises an exposure cavity for accommodating healthy animals and bacteria-carrying animals; a sealed experimental box is arranged in the exposure cavity; the healthy animals and the bacteria-carrying animals are placed in the experimental box; the biosafety cabinet is provided with an air supply filteringdevice and an air exhaust filtering device; the air supply filtering device is used for supplying air into the exposure cavity; the air exhaust filtering device is used for purifying air in the exposure cavity and exhausting the air; the experimental box comprises an air inlet and an air outlet; the air inlet communicates with the air supply filtering device; and the air outlet communicates withthe air exhaust filtering device. According to the technical key points, the experimental animals are placed in the experimental box and the propagation experiment is not directly carried out in the biosafety cabinet, so that the pollutant diffusion range is reduced and the experiment is safer; and the section of the droplet propagation experimental box is small and an accurate experimental resultis easy to obtain.

The invention relates to a corrosion-resistant multifunctional low-gas containing bulk sample content desorber. The desorber is provided with a bottom plate with a supporting function, wherein three gas collection measuring cylinders are vertically arranged in parallel on the upper part of the bottom plate; a vent valve is arranged on the upper part of each gas collection measuring cylinder; an air inlet in the upper end of the gas collection measuring cylinder I is communicated with an outlet C of a three-way valve I; an inlet hole in the upper end of the gas collection measuring cylinder II is communicated with an outlet C of a three-way valve II; a spillway hole in the bottom end of the gas collection measuring cylinder III is communicated with an outlet C of a three-way valve III; a spillway hole in the bottom end of the gas collection measuring cylinder II is communicated with an outlet C of the three-way valve IV; two vertical brackets are arranged in parallel on the upper part of the bottom plate; a transverse connecting rod is arranged between the two vertical brackets; a conical flask support is perpendicularly and fixedly arranged on the upper parts of the vertical brackets. According to the desorber, low-concentration corrosive gas in a coal bed can be collected, and the corrosion of the gas to a gas tank can also be overcome, so that the desorber is suitable for being popularized and used in the fields of scientific researches and industrial tests.

The invention discloses a multifunctional test bed for metal material tensile experiment. The multifunctional test bed comprises a base, an experiment table, a protection cover, an elevator drive component, a temperature control device and a tensile experiment device; the protection cover is arranged above the experiment table, a hydraulic rod is connected to the upper end of the protection cover, the lower end of the protection cover is matched with the experiment table in shape, and the protection cover can vertically move under the action of the hydraulic rod; the elevator drive component comprises a moving experiment frame and a lifting device, the lifting device is arranged in the base, the top of the lifting device is connected with the bottom surface of the moving experiment frame, and a through hole allowing the moving experiment frame to go through is formed in the experiment table; the temperature control device comprises a refrigerating unit and a heating unit which are arranged under the experiment table; the tensile experiment device is arranged in the moving experiment frame. The multifunctional test bed has the advantages of high experiment accuracy, controllable temperature, convenience in operation, high experiment table utilization and the like.

The invention relates to a liquid drop impact experiment device, in particular to a liquid drop impact experiment device for quantitatively controlling deformation and tension of a flexible substratethrough ventilation, and belongs to the field of liquid drop impact behavior control. The device comprises a droplet generation system, a substrate deformation control system, a high-speed imaging system, a lifting platform and a test bed, wherein the liquid drop generation system is used for generating liquid drops meeting experimental conditions, the substrate deformation control system is usedfor quantitatively controlling deformation and tension of the flexible substrate through ventilation, and the high-speed imaging system is used for capturing an impact process of the liquid drops anda substrate deformation process. The droplet impact experiment device has the beneficial effects that the defect that only the structure of the substrate can be replaced or modified when the elastic or flexible performance parameters of the substrate need to be adjusted in an existing experiment device is overcome, and the droplet impact experiment device is suitable for development of a large number of parameterized experiments and is beneficial to effective regulation and control of droplet impact behaviors.

An automatic sand abrasion device includes a shell, an integrated framework, a sand falling mechanism, a sand transport mechanism, a sand falling channel, a sample working frame and a circuit control cabinet, where the device adopts the transport belt and the second speed reduction motor to realize transportation of sand, and realizes that the weighed sand falls into the bottom of the abrasion device through the first speed reduction motor and the automatic weighing machine. The whole process can be automatically operated while parameters such as the operation time and the weight of abrasion sand are set, so that the detection efficiency for the abrasion resistance can be improved, and the labor cost is greatly reduced. The device is firm in structure and stable and reliable in work and improves the accuracy and efficiency of an experiment.

The invention discloses a precise quantification method of lentivirus packaging helper plasmids, comprising design of specific primers for special genes respectively carried by three helper plasmids and detection of lentivirus packaging helper plasmids. The special genes are gag gene, rev gene and vsv-g gene, and a pair of specific primers is respectively designed for the gag gene, rev gene and vsv-g gene. According to a traditional method, concentration of extracted plasmids is detected, and mole number is calculated on the basis of molecular weight of plasmids. The traditional method is simple and feasible, but cannot achieve precise quantification of packaging plasmids and has poor repeatability in a virus packaging optimization experiment. In comparison with the prior art, the invention is to design the specific primers for the special genes respectively carried by the three helper plasmids and carry out precise quantification of packaging helper plasmids by fluorescent quantitative PCR. Through experiments, specific copy number of the three packaging helper plasmids can be known. Thus, data support is provided for subsequent optimization of plasmid ratio, and experimental accuracy and repeatability are raised.

The invention discloses a beam-end loaded plane frame joint pseudo-static test loading device which comprises a hinge pillar boot which is used for being arranged on a component pillar foot in a sleeved mode, a pillar cap arranged on a component pillar head in a sleeved mode, two sets of loading ball hinges installed at the left beam end and the right beam end of a component respectively, a loading system connected with the loading ball hinges and a data collecting system. When the beam-end loaded plane frame joint pseudo-static test loading device works, the loading ball hinges rotate along with the test component, loading force is kept vertical all the time, the test accuracy is higher, and an instrument is not prone to damage. The beam-end loaded plane frame joint pseudo-static test loading device further has the advantages of being simple in structure, not eccentric in axial force, convenient to control and capable of providing four hinge support boundaries.

The invention discloses an online acoustic emission-electrochemical combined experimental device for stress corrosion of a tank bottom plate. The device comprises a hydraulic loading device, a load sensor, a loading knife, a three-point bending device, an acoustic emission sensor, a metal test piece, an etching solution, an organic glass electrolytic tank, a cushioning rubber pad, a guard sensor and a three-electrode system. The load sensor is arranged below the hydraulic loading device to measure a load loaded to the metal test piece. The test piece is arranged on the three-point bending support and keeps constant deformation under the load effect. The three-electrode system is connected to an electrochemical workstation to provide a constant potential for polarization. The sensor is fixed at the back of the test piece by a matching magnetic clamp in a good coupling manner and is connected with an acoustic emission meter AMSY-5 so as to monitor a stress corrosion acoustic emission signal from the test piece in real time. The online acoustic emission-electrochemical combined experimental device can be applied to on-line detection of the stress corrosion of the metal test piece under a constant load and electrochemical corrosion parameters and acoustic emission corrosion signals are collected synchronously. Moreover, the device is convenient to mount, dismount and clean and canbe used repeatedly.

The invention relates to a new energy automobile control circuit board performance test method. The method mainly comprises the following steps: plate clamping, height adjusting, dust raising, dust pile flattening, collecting and treating and other procedures are conducted; used performance detection equipment comprises a fixed base, a working frame, a dust raising machine, a clamping device and acollecting cabinet, the working frame is installed at the upper end of the fixed base, the dust raising machine is fixed to the upper end of the working frame, the clamping device is arranged in theworking frame, the collecting cabinet is arranged at the lower end of the working frame, and the collecting cabinet is arranged at the upper end of the fixed base in a sliding mode. According to the invention, the problems that the dust accumulation height on the surface of the circuit board cannot be controlled, the dust accumulation is uneven, the experimental test result is influenced, and onlythe circuit board with fixed length and width can be clamped when the circuit board is clamped in the traditional dust prevention performance test method for the new energy automobile control circuitboard can be solved.

The invention discloses a powder sample making mould assembly in an X-luminoscope. The powder sample making mould comprises a base, a fixed base, a sample cup, a pressing sleeve and a sample withdrawal sleeve, wherein the base is connected with one end of the fixed base in a sleeving manner; the sample cup is connected with the other end of the fixed base in a sleeving manner; after the sample powder is injected, the sample cup is taken out, and the pressing sleeve covers the fixed base to make samples; the sample withdrawal sleeve is connected with the bottom of the base in a sleeving manner, the pressing sleeve is pressed downwards to ensure that samples and the base fall into the sample withdrawal sleeve. The powder sample making mould assembly is easy to operate, and the prepared pressing plates are uniform and ordered in specifications, so that measurement errors can be reduced, the experiment accuracy degree is improved, and the mixing of the samples and boric acid is inhibited so as to guarantee the consistency of the contents of the samples.