77results about How to "Raise the level of research" patented technology

The invention discloses a real-time calibration and frequency measurement method for time base frequency and a device thereof, wherein the method comprises the following steps: 1) calibration step: a frequency measurement device acquires an external high-accuracy standard-frequency signal with Fs of given frequency as a calibration signal; the actual frequency value measured by the frequency measurement device is Fs'; a calibration factor K which is equal to Fs/Fs' is calculated and stored, and the calibration factor K can not be updated until the next calibration step is finished; 2) measurement step: the frequency of the unknown signal measured by the frequency measurement device is Fx', and the calculated and revised frequency value of the unknown signal Fx is equal to K * Fx'; 3) the process returns to step 1). The method and the device can ensure that, the time base frequency can be as accurate as 5E-10 and the second gate time frequency measurement can be as accurate as 1E-9 when measuring frequency and the accuracy of the measured frequency can be determined, thereby solving the problems of undetermined frequency timing base frequency accuracy, low precision, and the like of the prior art.

The invention discloses an in-water color particle image velocimetry system comprising a river project model, color tracer particles, a color web camera, a POE (power over Ethernet) switch and a digital image processing device. The color tracer particles are evenly distributed in water flow of the river project model, the web camera mounted above a surface of the water flow of the river project model is connected with the POE switch connected with the digital image processing device comprising digital imaging processing software. The invention further provides a color particle image velocimetry measuring method. By the arrangement, the technical problems that a black and white video camera sets higher requirements for light condition and is prone to being affected by light noises, more error vectors appear in flow field data, so that measuring accuracy is affected are solved.

The invention provides a three-dimensional foot type and sole pressure integrated measuring instrument. The three-dimensional foot type and sole pressure integrated measuring instrument comprises a measuring table, a data line, a power line and a computer, wherein the measuring table comprises an objective table, 3D true feeling camera sets, a sole pressure measuring plate, an indicator lamp stripand a master control circuit board, wherein the 3D true feeling camera sets are symmetrically mounted on the objective table to acquire three-dimensional foot type data; the sole pressure measuring plate is embedded in the center of the objective table to acquire sole pressure distribution data; the computer receives data acquired by the measuring table through the data line, data are subjected to treatment such as storage, editing, computing and visualization by integrated testing analyzing software mounted on the computer, and visualized display and application outputting of three-dimensional foot type and sole pressure distribution data are realized. By the three-dimensional foot type and sole pressure integrated measuring instrument, foot morphology and kinematic mechanical parametersof a user are synchronously measured and are analyzed in a fused manner, meanwhile, self-calibration can be implemented, measurement is facilitated, and parameters are abundant.

The invention relates to a quick abrasion testing system in the field of power machinery technique, aiming at providing a novel abrasion testing system used for a valve and a seat ring used for an internal combustion machine; the system comprises a cylinder cover, a valve, a valve spring and a valve seat ring; the valve is positioned on the cylinder cover; the valve seat ring is positioned between the valve and the cylinder cover; the valve rod of the valve passes through the cylinder cover; the end of the valve rod fixes the spring seat ring by a valve lock lamp; one end of the valve spring is supported on the cylinder cover and the other end thereof pushes against the spring seat ring; the system also comprises an electromagnet which is arranged on the cylinder cover and positioned at the lower part of the spring seat ring; the quick abrasion testing system can achieve extremely high impact frequency, and shorten the testing time; the dripping speed of the valve can be jointly determined by two different sensors and the accuracy of the test is improved; and the temperature of the cylinder cover is kept at the temperature of the cylinder cover when the internal combustion machine works normally, thus ensuring the reliability of the testing conclusion. The parts are few, the structure is simple and the manufacture cost is low.

The invention provides an ionized layer incoherent scattering radar simulation system, which is characterized in that a modular design idea is adopted, the system is divided into a signal simulation module, an incoherent scattering spectrum simulation module, an ionized layer parameter analysis module, a radar power simulation module and an antenna array simulation module according to a radar actual system structure and functions of each extension set, module functions are basically the same as completing functions of each system extension set, transmission and sharing of data and information among the modules can be realized, and dynamic demonstration is carried out by using an MATLAB graphical user interface function. The ionized layer incoherent scattering radar simulation system well solves a problem that the incoherent scattering radar is small in number of research platform and difficult in test, and can help the technicists to improve abilities of analyzing and solving problems and an ability of carrying out radar equipment technical research.

The invention relates to an optical waiting type plane imaging system for framing, scanning and simultaneous recording, comprising an objective lens, a waiting light splitter, two secondary light splitters, a framing device and a scanning device which are arranged corresponding to each secondary light splitter and a framing and scanning rotating mirror device. Two times of light splitting are realized by the waiting light splitter and the secondary light splitters, a framing optical path and a scanning optical path which are generated after light splitting both enter the framing and scanning rotating mirror device, and images are generated on a framing image plane and a scanning image plane respectively; as the framing optical path and the scanning optical path are provided with a commonobjective lens, the two paths have the same space datum and generate reflection images by the same rotating mirror, and the two paths have the same time datum, thus obtaining higher space informationand time information, high interpretation accuracy and high interpretation precision.

The invention discloses an electric tractor double-motor power junction control device and relates to the field of tractors. The control device comprises a wet clutch control oil way and a power junction gearbox. The wet clutch control oil way is connected according to a hydraulic oil way sequence. The power junction gearbox comprises two power input shafts, two power output shafts, a first wet clutch, an intermediate shaft and multiple pairs of gears. The wet clutch control oil way controls the wet clutch to be disengaged and engaged. The double-motor power junction control device can coordinate the working areas of two motors and also can conduct large torque output, the problem that an electric tractor is insufficient in power under a heavy-load working condition is effectively solved,meanwhile, work efficiency of the two motors is improved, different drive modes of the electric tractor are switched, and the dynamic property and economical efficiency of the electric tractor meet the requirements.

An air foam flooding produced gas on-line inspection apparatus and process, and belongs to the technical field of oil extraction. An explosion-proof power supply 1 is connected to and provides power for a flow controller 4, a solenoid control valve 5, an O2, CO, CO2 and combustible gas detection transmitter 10, a GPRS network device 12 and all pipe insulation heating devices. A wellhead casing head gas is introduced into a flow controller 4 through a gas introduction pipe; the other end of the flow controller 4 is connected to the solenoid control valve 5 via line; the other end of the solenoid control valve 5 is connected a buffer tank 6 via line; the bottom of the buffer tank 6 is connected to an electromagnetic valve 8; a pipe on the upper part of the buffer tank 6 is connected to a gas filter 9; the other end of the gas filter 9 is connected to the O2, CO, CO2 and combustible gas detection transmitter 10 via a pipe; the O2, CO, CO2 and combustible gas detection transmitter 10 is connected to a data acquisition unit 11; the data acquisition unit 11 collects and transmits the test data to the GPRS network device 12 and transmits the data to the a computer software apparatus 7 in a control room.

The invention discloses an interval forecasting method of a heat supply load based on a support vector machine and error estimation, relates to a method for forecasting the heat supply load, and aims to solve the problems of low forecasting accuracy and difficulty in application to heat-supply energy-saving reforming, heat power scheduling and control of a heat power station in the conventional interval forecasting method. The interval forecasting method of the heat supply load based on the support vector machine and the error estimation comprises the following steps of: firstly, on the basis of acquisition of sample data, establishing a support vector regression forecasting model, and performing point forecasting; secondly, on the basis of point forecasting, acquiring a forecasting error, and estimating an error interval; thirdly, with the point forecasting and the error interval, performing interval forecasting; and fourthly, evaluating forecasting effects of the point forecasting and the interval forecasting. The method provided by the invention can be directly applied to the heat-supply energy-saving reforming, the heat power scheduling and the control of the heat power station.

The invention discloses an insulating oil heating system for a transformer fire extinguishing true form test. The insulating oil heating system comprises a uniform heating/constant temperature devicewhich is arranged in an oil tank of a true form test transformer, a preheating device which is used for preheating the cold oil and then injecting the preheated cold oil into the oil tank, an oil supplementing device which is used for supplementing the cold oil, and a heating control module which is used for supplying power to the uniform heating/constant temperature device and the preheating device and controlling the heating power. The uniform heating/constant temperature device and the preheating device are both connected to the heating control module through power lines and control lines,a return pipe and a return oil pump are communicated between the preheating device and the oil tank, the oil supplementing device is communicated with the preheating device through a preheating oil pump, and the oil supplementing device and the preheating device are both communicated with a transformer oil conservator through oil conservator oil pumps. According to the method, the insulating oil can be uniformly heated to the temperature under the actual working condition, so that transformer oil true form fire extinguishing test data is more accurate, and the research level of a transformer fire extinguishing technology is improved; and meanwhile, the insulating oil can be recycled, and the test economy is high.

The invention provides a low-pressure-ratio axial compressor model level performance calculation method. The method is carried out according to the following steps of 1, collecting parameters: collecting environment parameters, flow parameters, inlet parameters, outlet parameters and early-stage preparation parameters of an axial compressor model level; 2, calculating overall performance parameters of the three-stage axial compressor model level: an overall energy head and overall variable efficiency; 3, obtaining a proportion coefficient of each stage of energy head and a proportion coefficient of variable efficiency; and 4, performing hierarchical calculation on the level performance parameters of each stage: according to the proportion coefficient of each stage of variable efficiency and the proportion coefficient of each stage of energy head, performing hierarchical decomposition on the overall performance parameters of the three-stage axial compressor model level obtained in the step 2. Through a multi-stage overall test, the decomposition calculation of each stage and the numerical simulation are combined to obtain relatively accurate axial compressor model level single-stageperformance parameters capable of guiding industrial application.

The invention provides a method for extracting rice albumin and globulin mixed protein, relates to a method for extracting albumin and globulin mixed protein, and aims to solve the current problem that albumin or globulin in rice is difficult to separate and extract. The method comprises the following steps: 1, grinding rice into rice flour; 2, degreasing the rice flour with n-hexane for 3-5 times to obtain degreased rice flour; 3, preparing a protein extracting solution from the degreased rice flour by a salt dissolving method; 4, precipitating the protein from the protein extracting solution with a trichloroacetic acid solution; and 5, performing vacuum freeze-drying on the precipitate to obtain rice albumin and globulin mixed protein. The method can be used for extracting the rice albumin and globulin mixed protein simply, quickly and efficiently, and is applicable to industrial production; and the extraction rate of the extracted rice albumin and globulin mixed protein is over 97 percent, and the purity of the rice albumin and globulin mixed protein is over 90 percent. The method is used in the field of rice protein extraction.

The invention provides a high-flux medicine automatic screening device and method. The automatic screening device comprises a three-dimensional moving device, an air channel system and an electrostatic field on-off control system; the three-dimensional moving device comprises four motor modules arranged at X, Y, and Z axial directions, a sprayer head and a baseplate platform ; the baseplate platform is arranged on an upper surface of an Y-axle motor module in a sliding manner; the sprayer head is arranged at a front end surface of the X-axle motor module and dead against the baseplate platform, and the three-dimensional moving device is controlled through a displacement control system; and the displacement system, the air channel system and the electrostatic field on-off control system arecontrolled through an upper computer control system. The device realizes the automatic control, the working intensity is reduced, the operation error is reduced, and the screening efficiency is improved; the technology for manufacturing micro-droplet through high-voltage electric field reduces the medicament dosage, and the experimental cost is greatly reduced, thereby satisfying a demand of quick, high-efficient and microscale medicine screening technology.

The invention discloses a method for measuring the relationship between soil infiltration wetting front and earth surface micro-topography. The method comprises the following steps: preparing a soil profile, setting an initial infiltration front, carrying out a test of artificially-simulated rainfall, carrying out space coordinate transformation on obtained image files by ArcGIS software, and analyzing the relationship between soil infiltration wetting front and earth surface contour line. The provided method can measure the wetting front during the soil infiltration process, is capable of describing the relationship between soil infiltration wetting front and earth surface micro-topography, and simply and precisely expresses the soil infiltration performance.

The invention discloses a method for measuring the average reflection step length of light in a detector. The method comprises: 1) filling a selected detector with a medium to be detected, and arranging a photomultiplier tube, wherein the inner wall of the detector is a high reflection material using diffuse reflection as the main; 2) irradiating in the detector by using a selected light source, and collecting light signals with the photomultiplier tubes; 3) changing the reflection area of the inner wall of the detector, repeatedly performing the step 2), and fitting according to the collected light signals to obtain the effective attenuation lengths [lambda]' of photons in the detector under different reflection areas; and 4) according to the data obtained in the step 3), fitting the point corresponding to the ratio r of the reflection area to the detector inner wall area by using a formula 1/[lambda]'=(1/[lambda])-ln(f)/L-ln(r)/L, and measuring the average reflection step length L of the light in the detector filled with the medium to be detected through fitting. According to the present invention, the method has advantages of simple operation, low error, high precision, novel principle, and strong deep development and application value.

The invention discloses a separation and verification method of different electron-acceptor phosphorus-accumulating bacteria in activated sludge, and belongs to the technical field of biological sewage treatment. The separation and verification method can separate the DNA of different electron acceptor phosphorus-accumulating bacteria in the activated sludge system of a sewage treatment plant, and analyze the characteristics of florae on the gene level by adopting a molecular biological method. The separation and verification method comprises the following steps: adopting 13C-sodium acetate as the carbon source of an experimental group and 12C-sodium acetate as the carbon source of a control group, conducting anaerobic phosphorus release for 2 hours, respectively using oxygen, nitrate and nitrite as electron acceptors, conducting aerobic or anoxic phosphorus uptake culture for 3 hours, conducting culture for 8 cycles totally, conducting ultrahigh-speed centrifugal separation and purification to obtain DNA samples with different density levels, and determining and analyzing the flora structures of the phosphorus-accumulating bacteria when the electron acceptors are different by a molecular biological method. The invention provides the method for analyzing the electron acceptors required by different phosphorus-accumulating bacteria, and provides a theoretical support for the denitrification-strengthened dephosphorization process of the sewage treatment plant practically.