109results about How to "Long test time" patented technology

The invention relates to a uniform flow vortex-induced vibration simulation tester for a seabed pipeline. The invention is characterized in that the tester comprises a simulating false bottom which is arranged in a towing tank; both ends of the simulating false bottom are respectively and slidingly arranged in upright columns in a penetrating way; the top ends of the two upright columns are jointly connected and arranged on a towing truck above the towing tank; the middle-lower parts of the two upright columns are respectively provided with an end part supporting structure; the two end part supporting structures are respectively connected with corresponding shaft ends of a seabed pipeline model; and the towing tank is internally provided with a measuring and analyzing system. As the tester has ingenious structure, can place the seabed pipeline model in the towing tank, simulates vortex-induced vibration under uniform flow, can simulate real seabed conditions and the seabed pipeline with the actual size, the test time is longer, the tester can be widely applied to the vortex-induced vibration test process of the seabed pipeline.

The invention discloses a target tracking method based on difficult positive sample generation. According to the method, for each video in training data, a variation auto-encoder is utilized to learna corresponding flow pattern, namely a positive sample generation network, codes are slightly adjusted according to an input image obtained after encoding, and a large quantity of positive samples aregenerated; the positive samples are input into a difficult positive sample conversion network, an intelligent body is trained to learn to shelter a target object through one background image block, the intelligent body performs bounding box adjustment continuously, so that the samples are difficult to recognize, the purpose of difficult positive sample generation is achieved, and sheltered difficult positive samples are output; and based on the generated difficult positive samples, a twin network is trained and used for matching between a target image block and candidate image blocks, and positioning of a target in a current frame is completed till processing of the whole video is completed. According to the target tracking method based on difficult positive sample generation, the flow pattern distribution of the target is learnt directly from the data, and a large quantity of diversified positive samples can be obtained.

Disclosed is a semiconductor-memory device comprising a selector for performing switching control such that in the standby state the refresh operation is performed responsive to an external-refresh-execution command supplied from outside the semiconductor-memory device, while in the active state, the refresh operation is performed, not under the control from outside the semiconductor-memory device, but under the control from a built-in timer.

A parallel concurrent test (PCT) system is provided for performing the parallel concurrent testing of semiconductor devices. The PCT system includes a pick and place (PnP) handler for engaging and transporting the semiconductor devices along a testing plane, the PnP handler including at least one manipulator. The PCT system also includes a device under test interface board (DIB), the DIB including a broadside test socket for broadside (BS) testing of the semiconductor devices, the broadside testing using at least half of a total number of a semiconductor device pins, and a plurality of design-for-test (DFT) test sockets for DFT testing, the DFT testing using less than half of the total number of the semiconductor device pins, and a tester in electrical contact with the DIB for testing the semiconductor devices in accordance with a stepping pattern test protocol.

The invention relates to a vortex-induced vibration test device for a stand pipe under the bidirectional shear flow and the bidirectional ladder shear flow, and belongs to the technical field of marine engineering. The vortex-induced vibration test device comprises a stand pipe model mechanism, a measurement and analysis system platform module, a drive module, a top cantilever module, a cylinder shaft segmentation module and a bottom supporting module, wherein the fixed end of the stand pipe model mechanism is suspended and fixed below the top cantilever module; the cylinder shaft segmentation module is perpendicularly placed in a marine engineering deep pool and is respectively and perpendicularly connected with the bottom supporting module, the drive module and the top cantilever module; the bottom supporting module is fixedly arranged on the lifting bottom of the marine engineering deep pool; the drive module is respectively connected with the cylinder shaft segmentation module and the top cantilever module and is used for outputting power; the left end and the right end of the top cantilever module are respectively connected with the cylinder shaft segmentation module; and the measurement and analysis system platform module is respectively connected with the stand pipe model, the top cantilever module and the bottom cantilever module. The vortex-induced vibration test device is convenient to install, update and change, and meets different functional requirements.

Disclosed herein is a semiconductor test apparatus for simultaneously testing a plurality of semiconductor devices. The semiconductor test apparatus includes a plurality of pattern generation boards, a DUT board, a backplane board, and a power supply unit. The pattern generation boards receive a test program, generate a test pattern signal and an expected signal, transmit the test pattern signal to the semiconductor devices, receive a test pattern result signal, compare the test pattern result signal with the expected signal, generate a Direct Current (DC) test signal and a DC test expected signal, transmit the DC test signal to the semiconductor devices, receive a DC test result signal and compare the DC test result signal with the DC test expected signal. The DUT board includes a plurality of sockets for connection to the semiconductor devices and a plurality of connectors for connection to the pattern generation boards. The DUT board receives the test pattern signal or the DC test signal, transmits the received signal to the semiconductor devices, receives the test pattern result signal or DC test result signal and transmits the received signal to the pattern generation boards. The backplane board includes a plurality of connectors for connection to the plurality of pattern generation boards and a communication interface unit, and mechanically supports the pattern generation boards. The power supply unit mechanically supports the backplane board and supplies power to the backplane board.

The invention relates to a device for testing vortex-excited oscillation and rotation of a vertical riser pipe under a uniform flow and a stepped uniform flow, belonging to the technical field of ocean engineering. The device comprises a riser pipe model mechanism, a measurement and analysis system platform module, a driving module, a top cantilever module, a bottom cantilever module, a cylindrical shaft segmentation module and a bottom support module, wherein the riser pipe model mechanism is fixedly arranged between the bottom cantilever module and the top cantilever module; the cylindricalshaft segmentation module is perpendicularly arranged in a deep ocean engineering pool and is respectively and perpendicularly connected with the bottom support module, the driving module and the topcantilever module; the bottom support module is fixedly arranged on a lifting bottom; the driving module is respectively connected with the cylindrical shaft segmentation module and the top cantilever module; the left end and the right end of the top cantilever module are respectively connected with the cylindrical shaft segmentation module; and the measurement and analysis system platform moduleis respectively connected with a riser pipe model, the top cantilever module and the bottom cantilever module. By using the invention, the uniform or stepped flow field of a riser pipe with an actualsize can be simulated.

The invention belongs to the field of micro-fluidic chips, and relates to a biological macromolecule detection method. An alpha-LISA technology and a droplet-based microfluidics technology are combined and optimized to prepare a micro-fluidic chip liquid. A novel biological macromolecule detection method with a high sensitivity is provided. A three-phase mixing technology is adopted. A passive mixing structure is used to fully and evenly mix the reaction liquid. A cross focusing technology is used to form droplets. The generated droplets have the advantage of smaller volume, and thus the reactions become faster. Moreover, the requirements on the samples are lower, the reactions are specific, sensitive, fast, and full; the washing does not need to be carried out after reactions; complicated complexes such as complete proteins, enzyme complex, bacteriophage, and the like, can be detected; the technical bottleneck of conventional commercial liquid chips at present can be broken through; the provided method can be applied to fast clinical biological macromolecule detection; the detection sensitivity and specificity are both improved, and the required sample amount is reduced.

The invention discloses an electronickelling solution for improving the corrosion resistance of a coating. The electronickelling solution comprises nickel salt, phosphorous acid, boric acid, organic carboxylic acid or salts thereof, and hydroxycarboxylic acid of unsaturated hydrocarbon. The electronickelling solution has good stability, no self decomposition and excellent corrosion resistance. The electronickelling solution solves the problem of poor dispersibility of a nickel-phosphorus alloy coating (namely the problem of skip plating in a region with low current density) in the prior art. Compared with a common nickel coating with the same thickness, no matter whether chromium is plated on the coating obtained by an optimal formula of the plating solution or not, the salt fog test time is prolonged by 3 times.

The invention discloses a hypersonic aircraft thermal protection material ground simulation test system and method. In a ground test process, a laser is used for heating a test piece, simulated airflow is loaded on the surface of the test piece, and an external force is loaded on the test piece through an electronic universal testing machine. Therefore, the material mechanical properties of the hypersonic aircraft thermal protection material in a real environment are simulated and evaluated, and finally, the thermal protection properties of the hypersonic aircraft material and the structure are inspected. The method has the characteristics of simple equipment, low test cost, high heating rate, high test temperature and wide application range.

A semiconductor integrated circuit (LSI) in which control information for determining a voltage or a width of a pulse produced itself can easily be set in parallel with other LSIs, and set information can be corrected easily. From an external evaluation device, a voltage of an expected value is supplied in overlapping manner to a plurality of LSIs each having a CPU and a flash memory. Each LSI incorporates a comparison circuit comparing an expected voltage value and a boosted voltage generated in itself. The CPU refers to a comparison result and optimizes control data in a data register for changing a boosted voltage. The CPU controls the comparison circuit and the data register and performs trimming in a self-completion manner, thereby making, trimming on a plurality of LSIs easily in a parallel manner and a total test time reduced.

The invention provides an atrial fibrillation judgment method. The method is used for comprehensively judging atrial fibrillation by adopting two or more than two judgment conditions, wherein the judgment conditions can comprise: the number of different sizes between adjacent RR intervals, the specific value of the total number of turning points in the RR intervals, a difference value symbol sequence in the RR intervals, Shannon entropy and types of the RR intervals and the like. Whether the atrial fibrillation occurs or not is comprehensively judged by adopting the plurality of judgment conditions and erroneous judgment is avoided; meanwhile, 129 continuous heart beats are calculated in real time and the atrial fibrillation judgment is delayed for about two minutes; an occupied memory is small and a calculation speed is rapid; the judgment method can also be planted into wearable equipment and is more convenient for testing.

The invention provides a top-movable vortex-induced vibration rotating device for a vertically-arranged vertical pipe under uniform flow and step flow in the technical field of ocean engineering. The device comprises a vertical pipe model mechanism, a measurement and analysis system platform module, a driving module, a top cantilever module, a bottom cantilever module, a cylinder shaft segmentation module, a bottom support module and a vibration module, wherein the vertical pipe model mechanism is fixedly arranged between the vibration module and the bottom cantilever module; the vibration module is fixed on the top cantilever module; the cylinder shaft segmentation module is vertically arranged in an ocean engineering deep pool and is vertically connected with the bottom support module, the driving module and the top cantilever module respectively; the bottom support module is fixedly arranged on a lifting base; the driving module is connected with the cylinder shaft segmentation module and the top cantilever module respectively; and the left and right ends of the top cantilever module are connected with the cylinder shaft segmentation module. The device can simulate the verticalpipe of an actual size, a uniform or step flow field, and the motion of a platform on the top of the vertical pipe.

The invention discloses a positron liquid perfusion system and method. The positron liquid perfusion system comprises a part to be detected and a positron liquid perfusion pipeline system. The perfusion system is based on the perfusion system and includes: conducting liquid filling on the part to be detected according to specific needs of the part to be detected; and placing the part to be detected in a gamma photon detecting and imaging device and conducting the static or real-time three-dimensional imaging on the perfusion inner cavity structure. The positron liquid perfusion system and method is based on the positron annihilation principle, and can conduct the three-dimensional imaging on the complicated inner cavity structure of part and the inner wall micro-defects through the nuclide probe in the positron liquid.

The invention relates to a variable cross-section heavy piston compressor. The variable cross-section heavy piston compressor comprises a high-pressure air chamber, a heavy piston, a compression pipe and a film clamping mechanism, wherein the high-pressure air chamber is used for driving the heavy piston; the compression pipe is composed of a thick compression pipe section and a thin compression pipe section at a diameter ratio of 2.0-3.5; the heavy piston is driven by the high-pressure air chamber to move inside the thick compression pipe section; the film clamping mechanism clamps a film inside the thin compression pipe section. The variable cross-section heavy piston compressor can effectively relieve shock wave attenuation caused by reflective rarefaction waves, greatly improve the stability of wave tunnel enthylpy value and nozzle chamber pressure and prolong effective wind tunnel testing time.

A reconfigurable device test scheme is provided for making a test of a reconfigurable device with configuration data which is loaded a smaller number of times. A reconfigurable device used herein holds a plurality of configuration data and is capable of instantaneously switching which configuration is implemented thereby. Specifically, one transfer configuration data and one or more test configuration data are previously loaded in a configuration memory of the reconfigurable device, and a test is made while sequentially switching the transfer configuration data and the test configuration data. In this way, the same configuration data need not be reloaded over and over, so that the test can be made with a smaller number of times of loading as compared with before.

The invention relates to a testing method for the MTF (Modulation Transfer Function) of a linear array infrared detector of the shape of a Chinese character "pin". The method comprises the following steps that: using a black body to carry out irradiation on a V-shaped target to obtain infrared imaging; moving a linear array infrared detector, which is packaged in Dewars, of the shape of a Chinesecharacter "pin" to finish focusing and the quick positioning of a target blade edge image and two rows of pixels of linear array infrared detector of the shape of the Chinese character "pin"; carryingout permutation and combination on the output data of two rows of pixels to obtain an ESF (Edge Spread Function); utilizing an algorithm to remove an effective response output pixel to enable the calculation of an inclination angle to be more accurate so as to effectively improve the testing accuracy of the linear array device MTF; and finally, calculating the MTF of the linear array device of the shape of the Chinese character "pin", and taking a MTF numerical value on the Nyquist frequency of the device as a final representation value of the device. By use of the testing method, the lineararray device of the shape of the Chinese character "pin" and the image blade edge of the V-shaped target can be accurately positioned, testing speed is quick, and the ineffective response pixel of thelinear array is rejected to improve testing accuracy. The method is suitable for testing the MTF of straight line shaped array infrared detectors, area array infrared detectors and nonstandard lineararray infrared detectors of the shape of the Chinese character "pin".

The present invention is to provide a method for establishing TCP connection according to NAT (Network Address Translation) behaviors, which is applied to a network system having a NBA (NAT Behavior Aware Server) located in the Internet and connected to two NATs in two private networks respectively. The method enables two network devices in the respective private networks to send testing messages to the NBA via the respective NATs. In response, the NBA sends reply messages to each network device to test the behaviors of the NATs respectively. Afterward, each network device generates a test result message according to each behavior of the corresponding NAT and sends the same to the NBA. Based on the test result messages, the NBA selects an optimal traversal technique from candidate traversal techniques, thereby allowing the network devices to respectively and directly traverse the NATs and establish a direct TCP connection therebetween.

The present invention provides an offshore wind turbine environment parameter test device. The device comprises a wind test system, a wave test system, a flow test system and a main control system. The wind test system employs a laser radar wind meter to measure wind parameters of multiple points and send the wind parameters to the main control system; the wave test system is configured to measureparameters of waves and send the parameters of waves to the main control system; the flow test system is configured to measure water flow parameters in a range from a seabed to a water surface heightand send the water flow parameters to the main control system; and the main control system is configured to receive and process data measured by the wave test system and the flow test system. The technical scheme provided by the invention has many test physical quantities such as wind speed, a wind direction, flow rate, a flow direction, a wave height and a wave direction, many measurement work conditions, long test time, and high in precision and can provide accurate environment parameter input condition for following load simulation calculation, and each sub system and the main system are subjected to serial communication to allow the signals not to be easily interfered.

The invention relates to a star sensor stray light test system based on the real starry sky. The system comprises a solar simulator, an irradiation beam shaping device, an optical path turning device,a tooling table board, a skylight device and a test computer device. Therefore, stray light is injected into a star sensor shading hood at a given angle under the starry sky background condition andthus a test task of the stray light test is performed. The technical means is provided for the factory test of the star sensor product; and the quantitative test and quantified evaluation of the starsensor performance are completed.