74 results about "Reduction test" patented technology

The invention discloses a bionics-based underwater jet surface drag reduction test device, which comprises a jet part, a power input assembly, a water distribution assembly, a moving assembly, a magnetic fluid sealing assembly and a signal processing assembly, wherein the motor of the power input assembly is connected with the input shaft of the jet part via a first coupler; the output shaft of the jet part is connected with a torque signal coupler of the signal processing assembly via a second coupler; the signal processing assembly and the jet part are arranged on the moving assembly; the water inlet pipe of the water distribution assembly is connected with a water inlet pipeline of the jet part; the water outlet pipe of the water distribution assembly is communicated with the water outlet pipeline of the jet part; and the jet part is sealed via an axial sealing assembly. The bionics-based underwater jet surface drag reduction test device has the beneficial effects that the jet surface drag reduction effect test and the non-smooth surface structure drag reduction effect test can be realized, and when the jet surface structure drag reduction effect evaluation is carried out, and a test sample can be processed into a jet hole structure with a different aperture shape, a different aperture size, a different arrangement form and a different inclination angle.

The invention relates to a recommended fertilizer application method of radishes. The method comprises the following steps of determining the target yield of radishes in season according to the past radish yield level in existing land; (2) determining the basic nutrition supply level of the soil of the existing land; (3) calculating the yield reaction of the existing land according to multi-year multi-point factor reduction tests; or estimating the yield reaction of the fertilization according to the basic nutrition supply level of the soil of the existing land and a yield reaction coefficient; (4) performing simulation by using a QUEFTS model to obtain the best nutrition demand of the radishes; calculating the consumption of N, P and K fertilizers required by the radishes to reach the target yield by combining the target yield, the yield reaction, the soil basic nutrition supply level, the agronomic efficiency, the preceding crop straw turnover and in-season crop nutrient residue balance factors. The method is applicable to the fertilization recommendation of the radishes in the land with different sizes; the application can be realized under the conditions of test with the soil or test without the soil; the characteristics of high timeliness, easy mastering, wide application and the like are realized.

A method determines an optimal or near-optimal conveyance network layout in which revenue from serviced customer locations is maximized while the cost of installing and/or maintaining the conveyance is minimized. The conveyance may, for example, be a fiber optic telecommunications cable or a power or utility distribution system. Algorithms in the method generate primal and dual bounds in a Prize-Collecting Steiner Tree Problem in Graphs (PCSPG). Those algorithms originate from a Lagrangian Non-Delayed Relax-and-Cut (NDRC) based approach and incorporate ingredients such as a new PCSPG reduction test, an effective Local Search procedure and a modification in the NDRC framework that allows additional reductions in duality gaps to be attained.

The invention aims to provide an elastomer rubber sealing ring drag reduction test device and an elastomer rubber sealing ring/non-smooth surface integrated drag reduction test device. A frequency converter, a frequency adjustment motor, a torque signal coupler and the left end of a transmission shaft are connected with one another in sequence; the right end of the transmission shaft is sleeved with a shaft sleeve; the transmission shaft is connected with the shaft sleeve through a flat key; the shaft sleeve is positioned in a test cavity; the test cavity is fixed on a device base; the middle part of the transmission shaft penetrates through the test cavity and is matched with the test cavity through cavity angular contact ball bearings; a sample piece sleeving cup is fixed outside the shaft sleeve; the sample piece sleeving cup is in clearance fit with the inner wall of the test cavity; an annular slot for mounting an elastomer rubber sealing ring is formed in the sample piece sleeving cup; the elastomer rubber sealing ring is in contact with the inner wall of the test cavity after being arranged in the annular slot. The elastomer rubber sealing ring drag reduction test device and the elastomer rubber sealing ring/non-smooth surface integrated drag reduction test device which are disclosed by the invention move steadily, and are simple and reliable in structure, controllable in pressure and convenient to mount and dismount.

The invention discloses a variable-water-depth towing tank air-layer resistance reduction test device and method. A model to be tested is placed under the water in an experiment tank, and total resistance and local friction force of the model to be tested and advancing in the water are measured; the total resistance and local friction force of the model to be tested and advancing in the water under such state can be measured through an air supplier and an air injection device; the total resistance and local friction force of the model to be tested and advancing in the water after an air layer is diffused can stilled be measured after closing the air supplier and the air injection device; and in the process, an underwater camera system continuously records the influence of an underwater flow field. The test device and method are suitable for underwater navigation body and water surface ship model air injection resistance reduction resistance sea-keeping test; and the test technique can provide test foundation for the air-layer resistance reduction mechanism research and also can provide technical support for engineering application of a bubble boat.

The invention relates to a nanometer noble metal/POSS hybridized polymer micro sphere and a preparation method thereof. A POSS-end-capped amphiphilic polymer can be assembled into an aggregate type reverse micelle in a nonpolar solvent. The nanometer noble metal is prepared by using a water pool made of the reverse micelle as a reactor, and reverse micelle crosslinking is carried out finally to obtain stable hybridized polymer micro sphere containing nanometer noble metal. The invention provides a simple and easy method for preparing the nanometer noble metal/POSS hybridized polymer micro sphere by steps of carrying out assembling and encapsulating in sequence. The content and size of the noble metal can be realized by controlling the size of the water pool. A catalytic reduction test on the p-nitrophenol shows that the hybridized micro sphere has efficient catalytic performance. The nanometer noble metal/POSS hybridized polymer micro sphere and the preparation method thereof are expected to be applied to the fields of selectivity catalysis and biological medicine.

The application presents and describes a method and an apparatus for measuring the killing effectiveness of a disinfectant for micro organisms and the spores thereof with a sensor system which has at least two sensors, wherein the at least two sensors are in contact with the disinfectant and the measured signals are collected by a computation unit which is connected to the sensor system. In order to reliably determine the sterilization effect of arbitrary disinfecting processes and disinfectants, provision is made for a validated germ reduction test to be performed during a signal capture in order to determine the germ reduction rate and for the measured signals to be put into a particular ratio to one another and for this to be used to calculate, for each state of the disinfectant, a particular pattern which is used as a basis for a reproducible ratio for signal data and sterilization effect. In this case, the sensor system has a plurality of sensors (M1, M2,..., Mn) which are combined to form a multisensor unit (1) which is connected to a computation unit (4). FIGURE 1 is intended for the abstract.

The invention relates to a lotus leaf stem imitative cylinder around flow drag reduction test model. The test model comprises a support, a supporting rod, a fixing supporting rod and three lotus leaf stem imitative test model bodies. The support is used as a carrier of the lotus leaf stem imitative test model bodies and other accessories, the supporting rod is used for fixing the test model into a wind tunnel or a water tunnel so as to be connected with an external device at the same time, the fixing supporting rod is used for fixing the lotus leaf stem test model bodies and connected with the support through bolts, and the three lotus leaf stem imitative test model bodies are connected and fixed between the support and the fixing supporting rod through bolts, so that the drag reduction effect of the lotus leaf stem imitative test model bodies and the condition of a flow field behind the lotus leaf stem imitative test model bodies are conveniently tested.

The invention relates to the technical field of fault diagnosis and particularly relates to a bearing health state evaluation method and device based on a neural network. The method comprises the steps of acquiring training data which is historical data representing a bearing vibration signal, extracting a characteristic value of the training data and a fault type corresponding to the characteristic value, determining optimal dimension reduction training data of the training data, calculating a mean value and a covariance matrix corresponding to each fault type in the optimal dimension reduction training data, obtaining dimension reduction test data by performing dimension reduction on the test data received in real time, calculating the probability value of the dimension reduction data under each fault type according to the mean value and the covariance matrix, and taking a fault type with a maximum probability value as the fault type of bearing fault diagnosis. The online predictionrate of the bearing fault diagnosis is improved.

The invention discloses a triaxial consolidation test-based method for confirming a relationship between a soil body permeability coefficient and a void ratio. The method comprises the following steps: firstly, acquiring a test soil sample, and acquiring an initial void ratio e0 of the soil sample by tests; secondly, preparing a test sample, and carrying out saturation treatment on the prepared test sample; then, carrying out a classification pressure-reduction seepage triaxial consolidation test on the test sample, and recording the pore pressure value and the volume variation value of the test sample in the testing process; then, treating recorded testing data, and calculating the permeability coefficient and the void ratio in the classification pressure-reduction process; and finally, confirming the relationship between the soil body permeability coefficient and the void ratio. According to the invention, a triaxial consolidometer is adopted for carrying out classification pressure-reduction seepage testing on the soil body test sample, and the permeability coefficient and the void ratio in a classification pressure-reduction test each time are calculated according to the pore pressure value and the volume variation value in the testing process, and finally the relationship between the soil body permeability coefficient and the void ratio is confirmed. The method is simple in principle, is convenient to operate, is accurate and reliable, and can rapidly determine the variation rule of the permeability coefficient.

The invention relates to an underwater-based multi-functional bionic drag-reduction test device. The underwater-based multi-functional bionic drag-reduction test device includes a test platform support, an experiment test assembly, a power input assembly, a torque signal acquisition assembly, a water distribution assembly and a moving assembly; the experiment test assembly comprises a first test sample test assembly, a second test sample test assembly and a sealing cylinder assembly, wherein the first test sample test assembly and the second test sample test assembly are both arranged inside the sealing chamber assembly, the first test sample test assembly is arranged coaxially in the inner cavity of the second test sample test assembly; the torque signal acquisition assembly includes a torque signal coupler, a signal acquisition module, a strain gauge and a torque output shaft; and the power input assembly includes a motor, a motor supporting seat, a belt pulley, a belt and a power input shaft. The underwater-based multi-functional bionic drag-reduction test device of the invention has the advantages of small size, low cost, a plurality of test functions, convenience in installation and disassembly, and applicability to different fluid tests.

The invention relates to the technical field of metallurgy and discloses a test method for simulation of iron ore direct-reduction by a coke reactive determination device. The test method comprises the following steps of putting iron ore and reduced coal into the coke reactive determination device according to a mass ratio of 100: 30-100, carrying out a direct-reduction test at a reduction temperature of 950-1200 DEG C for 60-120min, wherein in the later period of the reduction reaction, when reduction gas pressure is reduced, CO2 gas is fed into the coke reactive determination device to improve a reduction medium concentration, and carrying out standing for 10-20min after electroreduction so that the iron ore is further reduced. The test method can simulate a direct reduction process of iron ore in devices such as a shaft furnace and a rotary kiln under laboratory conditions by the coke reactive determination device so that the relationship between an iron ore reduction temperature, reduction time, a CO2 feeding amount and continued reduction time, and reduced ground concentrate powder iron grade and a metallization rate is determined, and a relationship among an iron ore reduction reaction rate, the CO2 feeding amount and an exhaust gas generation amount is determined. The test method can provide reliable parameters for iron ore direct reduction.

The invention discloses a multifunctional gas analyzer for livestock, and belongs to the technical field of livestock gas analysis. In the multifunctional gas analyzer provided by the invention, a nitrogen sack is connected with inlets of six electromagnetic valves, and outlets of the six electromagnetic valves are connected with normal open holes of another six electromagnetic valves; one ends of six gas backflow air inlet pipes are connected with inlets of six fermentation tanks and respiratory metabolism chambers, and the other ends of the six gas backflow air inlet pipes are connected with normal closed outlets of the six electromagnetic valves; one ends of six gas backflow air outlet pipes are connected with six fermentation tanks, the respiratory metabolism chambers and livestock room outlets, an output end of a sensor group is connected with a microcomputer, and an air inlet of the sensor group is connected with air outlets of the six electromagnetic valves; an air outlet of the sensor group is respectively connected with air inlets of the six electromagnetic valves through a flowmeter, a minitype air pump and a barometer, and the normal closed air inlets of the six electromagnetic valves are connected. The multifunctional gas analyzer provided by the invention has the advantages that six channels can simultaneously on-line measure rumen liquor invitro fermentation and animal respiratory metabolism, the contents of carbon dioxide, methane and ammonia in a livestock room environment are monitored, and methane and carbon dioxide emission reduction tests are performed.

The invention discloses a vibration reduction test device for vibration drilling. The device is connected with a drilling machine; a spindle of the drilling machine is connected with a drill bit; the device comprises an acceleration sensor, a charge amplifier, a level meter, a DC (direct current) motor, a silicon controlled DC speed regulation device, a rotation speed command signal generator, a speed meter, a filter, a recorder and a spectrum analyzer, wherein the rotation speed command signal generator is sequentially connected with the controlled silicon DC speed regulation device, the DC motor and the spindle of the machine tool; an input end of the acceleration sensor is connected with the neck of the drill bit; an output end of the acceleration sensor is connected with an input end of the charge amplifier; an output end of the charge amplifier is connected with an input end of the level meter; the speed meter is connected with the spindle of the machine tool and the filter respectively; an output end of the rotation speed command signal generator, an output end of the level meter and an output end of the filter are all connected with an input end of the recorder; and an output end of the recorder is connected with an input end of the spectrum analyzer. Through the invention, optimal speed change parameters can be effectively screened out, thus the hole processing quality and efficiency are improved.

The present invention provides a camera color restoration test method based on visual perception, adjusts the Lab value of the monochrome picture corresponding to the 24 color blocks of the Macbeth color standard card, and obtains 24 standard displays that are completely consistent with the Lab value of the standard monochrome picture screen, the camera shoots the 24 standard display screens, obtains 24 captured images, and measures the Lab value (k=1,2,3...24), and the standard Lab value of the standard display screen ) to compare one by one to get the color difference values ​​of 24 colors , the color shift index is defined as . The beneficial effect of the present invention is: be applicable to all photographing equipments with imaging function; Compared with physical test chart card, digital image is less affected by environment, and test result is more objective; Manual adjustment generates standard image; Conversion formula is not used, and the result More reliable, use CIE DE2000, which is the best based on visual perception uniformity, as the color difference formula.

The invention provides a line-to-meter topology anomaly identification method for a double-shot cable distribution network wiring method, which belongs to the field of line loss control. The identification method comprises the steps that line loss rate anomaly analysis is carried out on a first line n and a second line m, which are mutually standby; the A and B meters of the same user and the first and second distribution meters of same substation are selected from the power of the power consumption side of the first line n and the second line m, and an exchange test is performed; the line structure of the first line n and the second line m is split, and the line loss rate and the figure switch state are combined to perform a power reduction test; and on-site troubleshooting and elimination are carried out for the first line n or the second line m according to a suspected error set. The identification method can directly reflect the influence of topology anomaly on the line loss rateof each line, can be used to predict the anomaly cause. The anomaly cause can be effectively judged, so that the identification method has high applicability. The identification method can be widely used in the field of line loss monitoring in the operation of a power system.

The present invention describes perfumes and perfuming compositions having an anti-microbial activity and containing effective amounts of certain perfuming ingredients which have an anti-microbial activity as evaluated by the Microbial Reduction Test.

The present invention discloses an electronic chip test system, method and apparatus. The system comprises a programmable processor, a to-be-tested chip and a controller, wherein the programmable processor is used for preprocessing a test image to obtain a sub-image of the test image or a gray value of the pixel points and sending the sub-image of the test image or the gray value of the pixel points to the to-be-tested chip, and the test image is used for testing the to-be-tested chip; the to-be-tested chip is used for restoring the test image according to the sub-image of the test image or the gray value of the pixel points output by the programmable processor, and performing test by using the test image; and the controller is used for controlling the test process of the to-be-tested chip. The system, method and apparatus provided by the invention solve the technical problems of relatively high cost of hardware of an automatic test system and relatively long cycle of software development caused by internal flash and DDR memory modules of the automatic test system in related art.

The invention relates to test methods for urban rail transit vehicles and specifically provides a method for measuring wheel load data of a railway vehicle under different track twisting conditions. The method is implemented by means of a moving test tool. The moving test tool comprises a location pedestal fixed on a track; the upper portion of the location pedestal is successively provided with force sensors and an upper pressing plate; the force sensors are in control connection with a control terminal; a test wedge is detachably mounted on the upper pressing plate. The test wedge can realize height change between wheel sets so that the working condition of track twisting can be simulated. Compared with conventional wheel load reduction test methods for subway vehicles, the method is applicable to the load reduction tests for various kinds of railway vehicles, is not restricted by vehicle structures and has greatly-improved applicability and practicability.

The invention discloses a method for correcting a test deviation of a relative reduction rate of pellet. The method is characterized by installing Matlab software on a computer, correcting the final reduction rate of a reduction signal at the end of the reduction test by using Daubechies wavelet in the Matlab software, separating noise of the reduction signal from the original signal, eliminating the noise in the original signal of the reduction signal in the presence of external interference, decomposing the mixed signal to different frequencies of block signals, reducing the sawtooth reduction signal to give a smooth curve, and obtaining the reduction rate the same with that of the original noise-free reduction signal curve. The method has the advantages that the noise of the pellet reduction curve is reduce conveniently by using the Daubechies wavelet combined with a GUI function of a Matlab wavelet analytical tool box, to achieve result correction. By correcting the reduction curve via the method, the detection time can be shortened by at least 16h (i.e. half time of retest), and the material cost can be saved by at least 1800 rmb in each test at the same time.