87results about How to "The test result is valid" patented technology

The invention relates to an electromagnetic tracking method based on an inductance coil. The inductance coil detects the magnitude of a magnetic field around a current carrying wire, so as to determine a position relationship between a moving object and the current carrying wire. Through the research on the number and the arrangement of the inductance coils, an electromagnetic-guidance-based tacking method consisting of seven inductance sensors is designed, so the detection of a magnetic signal under different wire arrangements and complicated magnetic field environment is well realized so as to determine the position. A detection result is more stable, reliable and effective, and the device has the characteristics of simpleness, reliability and wide application fields.

The invention discloses a synthetic aperture radar (SAR) target detection method based on an improved visual attention model and belongs to the technical field of image processing. The SAR target detection method mainly solves the problem of failure of a traditional visual attention model in the aspect of SAR image processing. The SAR target detection method includes: under-sampling is performed on an SRA image to be detected, texture features and wavelet features are extracted from the sampled image, linear superposition is performed on the features, and normalization and significance processing is performed on the features to obtain an initial significant figure; visual receptive field template filtering is performed on the initial significant figure to obtain a final significant figure; at last the final significant figure adopts bilinear interpolation to be the same as the size of an original SAR image, and a light area in the interpolated significant figure is used as a target area. The SAR target detection method based on the improved visual attention model has the advantages of being rapid in calculating speed, remarkable in detection effect, accurate in positioning and capable of being used for early detection of an SAR image target.

The invention belongs to the technical field of aircraft rear fuselage structure fatigue tests, and particularly relates to a fatigue test device, which comprises two vertical fin vibration load loading devices, wherein each vertical fin vibration load loading device is used for correspondingly connected with a vertical fin of the aircraft rear fuselage structure for applying a vibration load to the corresponding vertical fin two vertical tail gas dynamic load loading devices, each vertical tail gas dynamic load loading device being used for being correspondingly connected to one vertical finof the aircraft rear fuselage structure to apply aerodynamic load to the corresponding vertical fin; and an engine frame vibration load loading device which is used for being connected to an engine frame of an aircraft rear fuselage structure and applying a vibration load to the engine frame. Furthermore, the invention relates to a fatigue test method which is implemented on the basis of the fatigue test device, and a relatively more effective test result can be obtained when the fatigue test method is applied to the aircraft rear fuselage structure fatigue test.

The invention discloses an intelligent on-line checking method for a transformer oil surface thermometer. The method comprises the steps that: (1) a control module generates a control signal such that the oil surface thermometer and a calibration sensor start to collect oil temperature data in an oil storage tank, and a temperature sensor of the oil surface thermometer and the calibration sensor have a same data collection interval, (2) the oil surface thermometer obtains a group of actual measurement data, a calibration oil surface thermometer obtains a group of calibration measurement data and transmits the measurement data to the control module, (3) the control module uploads the actual measurement data and the calibration measurement data to a data cloud platform through a communication module, and (4) the data cloud platform calculates and obtains an oil surface thermometer measurement error. The invention provides an online detection method for transformer oil temperature detection, the accuracy calibration of the transformer oil surface thermometer can be realized under the condition of no power cut, and the method has an important meaning for the safe and stable operation of a power grid.

A detecting device and a detecting method for evenness of a fuel cell bipolar plate are provided. The detecting device comprises a control platform, a press and a tested assembly comprising an upper end plate, a lower end plate, a tested bipolar plate and a membrane electrode polar assembly (MEA). The detecting device is characterized by further comprising a carbon paper false electrode formed by clamping white stick paper through carbon paper. The white stick paper and the positions of the four corners of the MEA are all provided with carbon paper false electrode location holes corresponding to location holes arranged on the tested bipolar plate. The detecting method is that the upper end plate and the lower end plate clamp the tested bipolar plate, the MEA and the carbon paper false electrode and are arranged between an upper mold and a lower mold of the press, and pressurizing and pressure maintaining are performed on the tested assembly according to practical assembly force of galvanic pile. The white stick paper is taken out after pressure is removed, a user can observe prints on the white stick paper and determine the evenness of the bipolar plate according to the length and definition of the prints. The detecting device and detecting method for the evenness of the fuel cell bipolar plate can truly reflect the evenness of the bipolar plate under the practical assembly force of the galvanic pile so that the test result is true and effective.

The present invention discloses a server interface concurrent testing method. The method comprises the following steps: receiving bulk-imported interface data and preset result data of a plurality of simulation users, and submitting the interface data to a server; and receiving return data of the server, comparing the return data with the preset result data, and obtaining a testing result according to a comparison result. The present invention further discloses a server interface concurrent testing apparatus. According to the server interface concurrent testing method provided by the present invention, input time of the interface data and the preset result data can be reduced, and input efficiency of the interface data and the preset result data can be improved, so that testing efficiency of server interface concurrent testing can be improved.

The invention discloses an image saliency object detection method based on central dark channel priori information. The image saliency object detection method comprises the steps of: performing positioning detection on a saliency region of an image, so as to obtain an initial detection result of a saliency object in the image; and utilizing the central dark channel priori information provided by the invention to optimize a final result of saliency detection. The image saliency object detection method can detect the saliency object more precisely and more robustly. The image saliency object detection method utilizes the central dark channel priori information for conducting saliency detection, can improve the precision of saliency object detection, further enhances the robustness of saliency detection, can solve the problems that the existing saliency detection is not high in precision and has insufficient robustness, so that the saliency region in the image can be displayed more precisely, provides precise and useful information for later application such as target identification and classification, is suitable for more complex scenes, and has wider application range.

The invention relates to the field of biochemical analysis and detection, and in particular relates to a hairpin probe group based on enzyme assisted cascade cycle amplification, a preparation methodand use. According to the hairpin probe group provided by the invention, a biological target to be detected is used as a first-level target to trigger first target cycle amplification, so that enrichment amplification of a secondary target sequence is realized; simultaneously, the secondary target sequence also can trigger second target cycle amplification; fluorescent signal sequences are continuously released; and thus, cascade cycle amplification of the fluorescent signal sequences is realized. By adoption of the hairpin probe group, a lot of fluorescent signal sequences can be triggered and generated only through trace biological targets; the very high fluorescence signal intensity is generated; the detection sensitivity of the biological target is obviously increased; the detection limit is increased; simultaneously, the specificity of the cascade cycle amplification of the probe in combination with the biological target is high; and a detection result is accurate.

The invention discloses a method for quantitatively detecting chromium in edible gelatin on the basis of terahertz time-domain spectroscopy. According to the method, firstly, multiple samples with different chromium content are prepared, then the multiple samples and a blank state are tested respectively by a terahertz time-domain spectral system, time-domain terahertz signals of the to-be-detected samples and the blank state in a preset frequency band are obtained, an absorption coefficient of each sample is calculated by performing Fourier transform on the time-domain terahertz signals, and a quantitative analysis model for the chromium content and the absorption coefficients is constructed with a least square method, so that the chromium content of an unknown sample can be calculated according to the absorption coefficient of the unknown sample. The samples are prepared conveniently and rapidly, addition of other substances is not needed in a detection process, a chemical processing process is not needed, the operation is simple, the analysis speed is high, and the cost is low; besides, by means of the constructed quantitative analysis model, a detection result is more real and more effective.

The invention discloses a swing seat anti-impact tester. The swing seat anti-impact tester comprises an aluminum ball, a controller, a swing seat and a fixing support, wherein an angle selection mechanism is arranged at a position corresponding to the swing seat for adjusting and fixing the testing angle of the swing seat. The tester is provided with a left-right movement adjusting mechanism and an up-down lifting adjusting mechanism for adjusting the position of the aluminum ball, so as to be adaptive to swings having different specifications. According to the tester, a sensor is used for measuring data for improving the testing precision, and an electromechanical device is used for adjusting the position of the aluminum ball and the testing angle of the swing seat, so that the operation is simplified, the testing data is more reliable and the quality of the swing is promoted.

The invention discloses a cDNA chip for detecting gene expressing information of crucifer plants under biological or non-biological stress. The gene chip takes the cDNA fragment of Chinese cabbage gene under versity and special growing stage as the probe which is composed by probe with sequences shown in SEQ ID No.:1-221DNA and probe sequence from 3885 strips gene bank. The invention can be used not only in batch-detecting of gene expressing information of crucifer plants under biological or non-biological stress, screening of differential gene, but also can be used to build gene expressing profiles of cruciferous plants in different growing stages, different tissues and organs, and even idioblast. High-throughput detection of gene expression information can be carried out by the application of the gene chip, which is convenient and safe, with reliable and effective test results, and can save a lot of time, human, material and financial resources and has broad application prospects.

The invention discloses an electric bicycle performance test platform comprising a rear wheel driving device and a vehicle seat compressing device. The wheel driving device comprises a first rear axle roller and a second rear axle roller. The first rear axle roller and the second rear axle roller are fixed in a mutually parallel way through bearing pedestals. The first rear axle roller is connected with a first motor. The second rear axle roller is connected with a second motor. The rear wheel of a tested vehicle body is arranged in the two rear axle rollers of the rear wheel driving device. The vehicle seat compressing device is used for loading compressing force for the tested vehicle body so as to simulate vehicle-mounted weight. The second motor and the second rear axle roller load positive torque to the rear wheel of the vehicle body to apply push force and the vehicle wheel is enabled to be in the critical operation state so as to compensate frictional force of the test platform and frictional resistance between the vehicle wheel of the electric vehicle and the rollers of the test platform. The first motor and the first rear axle roller load opposite torque to the rear wheel to apply resistance so as to quantitatively simulate the resistance in driving of the electric vehicle.