50results about How to "Reflect performance" patented technology

The invention discloses an embedded system performance evaluation method based on five capabilities to solve the technical problem that an evaluation result of an existing embedded system performance evaluation method is poor in comprehensiveness.According to the technical scheme, an index system of the five capabilities is structured, index scores are calculated, and finally comprehensive evaluation is carried out.In the structuring process of the index system, indexes capable of reflecting the five capabilities are selected, repeated terms are removed, cross terms are separated, like terms are merged, and thus the indexes have operability.In the calculation process of the index scores, a black box method is adopted for testing indexes difficult to quantize.Random numerical value indexes are converted into numerical values between [0,1] in a normalization mode; the testing results of index testing terms which are a Boolean proposition are 0 or 1; part of index testing terms which cannot be expressed with numerical values are quantized with an empirical approach.Finally, display is carried out with a radar image.The evaluation result of the method is complete and comprehensive, and scientifically reflects the performance of the embedded system.

The invention discloses a multimode heterogeneous DTN simulation verification system and method. The distributed architecture of a control workstation and a simulation workstation is adopted, virtual DTN node attribute information and a simulation event queue are generated through a virtual DTN scene module according to a preset DTN scene, a master control module selects simulation DTN node modules on the simulation workstation to simulate virtual DTN nodes, the simulation DTN mode modules carry out module communication according to simulation events, simulation running data are generated according to simulation running conditions, and the virtual DTN scene module calculates a network performance index value according to the simulation running data of all the simulation DTN node modules in the whole simulation running process. The information interaction of the control workstation and the simulation workstation is completed through the master control module and a controlled module in the simulation running process. The performance of a simulated multimode heterogeneous DTN can be actually reflected, and simulation verification on the large-scale multimode heterogeneous DTN can be carried out.

The present invention provides a method for carrying out positioning in-orbit test authentication based on a navigation satellite leakage signal. Firstly, an in-orbit test flight height is determined, the relative position relation among a detector, a navigation satellite and the Earth is calculated, the angle of an any position relative to Earth vector and detector vector of the navigation satellite is calculated according to the position relation of the detector, the navigation satellite and the Earth, and the visibility of the navigation satellite is judged. According to the navigation satellite visibility judgment result, the height range of boot working and boot time of a satellite-borne navigation receiver are determined, according to the navigation visibility judgment result, an in-orbit flight attitude is analyzed, and the wave beam angle range of a GNSS navigation receiving equipment receiving antenna is determined. The receiving condition of the navigation leakage signal and a navigation positioning result are recorded in an orbit test. The receiving ability of the navigation leakage signal of the GNSS navigation receiver and the influence on the navigation performance are compared and analyzed. The problems of the comprehensive functional performance testing of the navigation satellite leakage signal receiving equipment of deep-space exploration and high-Earth orbit satellite navigation satellites and the system design of positioning by using the navigation satellite leakage signal are solved.

The invention discloses a flash memory erasure interrupt recovery test method and device, electronic equipment and a storage medium, and the method comprises the following steps: writing first data information into a non-operation area in a flash memory; writing second data information into an operation area in the flash memory; sequentially and circularly subjecting the selected sector of the operation area to the cyclic operation of erasing, blank checking, programming and checking, interrupting and recovering the erasing operation according to a set time interval in the erasing process, and detecting and recording whether the first data information of the non-operation area is changed or not at intervals; and when the cyclically executed operation of the selected sector reaches a set cycle index, ending the cycle. According to the method, the flash memory chip is cyclically tested for multiple times, and interruption and recovery operations cover the whole erasing process, so that the test data is representative, the performance of the flash memory chip can be accurately and effectively reflected, and meanwhile, the influence of erasing interruption and recovery operation accumulation on data in a non-operation area can be effectively and clearly reflected.

The invention relates to a method for measuring the interlocking capability of coarse aggregate, belonging to the technical field of road material design evaluation. The method comprises the following steps of: (1) filling coarse aggregate gravels into a rigid test barrel and ramming the coarse aggregate gravels; (2) penetrating a conical rigid squeeze head into the gravels at a certain loading speed rate, and recording a penetration depth H and a squeeze force (resistance) F suffered by the rigid squeeze head; and (3) working out a penetration power W=S0Fdh so as to evaluate the interlocking capability of the coarse aggregate. The method evaluates the interlocking capability of the coarse aggregate grading gravels by adopting the conical squeeze head penetration test, and effectively avoids the defects in the original test methods, i.e., aggregate mixing ratio is changed and real properties of design grading can not be correctly reflected due to serious aggregate breakage in the pressing-in process. In addition, the method takes energy indexes in terms of material deformation and stress into full consideration, adopts the penetration power to evaluate the interlocking capability of the coarse aggregate and more fully reflects the whole properties of the material when compared with simpler deformation index.

The invention discloses a test method for the endurance of a photovoltaic component in hot and humid environments. The method comprises the following steps: (1) performing outdoor exposing on the photovoltaic component to be tested, which is in the state of an open circuit; (2) exposing the photovoltaic component to be tested, which is exposed outdoors with ultraviolet light; (3) connecting the photovoltaic component to be tested, which is exposed with the ultraviolet light in a short-circuit manner, and testing the salt-spray corrosion of the photovoltaic component to be tested, which is in a short-circuit state; (4) testing the condensation humid of the photovoltaic component to be tested, on which the salt-spray corrosion test is performed; (5) testing an STH combined environment of the photovoltaic component to be tested, on which the condensation humid test is performed. The test method uses the true reaction service environment condition as the purpose, the illumination is introduced, besides, factors like seasons change and diurnal change are considered, and the light or hot or humid cycle tests are designed; the test method uses the representation the situation that the material is failed as the purpose, and combined tests, such as ultra violet resistance and salt fog corrosion tests are introduced, so that the durability of key materials of the photovoltaic component is checked comprehensively; the insufficiency of the standard test method can be overcome, and the using performance of the photovoltaic component in the long service term under the condition of humid and hot environments can be reflected.

This invention discloses a property test desk for FM variable amplitude car hangers, which fixes two same sets of exciting desks with FM and variable amplitude function at either end of a straight frame oppositely and the axes of two rotation mandrels contained in the exciting desks share one, the function is realized by the frequency adjust device and the amplitude regulation device, the car protection device is fixed on the base located above two vibration rest frames in the vibration maintenance and a guiding unit and below the vibration board, which realizes the active vibration of right and left exciting desks.

The invention provides a shaft sleeve wear test device and belongs to the technical field of mechanical performance test equipment. The shaft sleeve wear test device comprises a control panel, a testbench, a frame, a drive shaft for mounting a shaft sleeve, and a swing mechanism for driving the drive shaft to swing. The frame is arranged on the test bench. Both ends of the drive shaft are arranged on the frame. The part, equipped with the shaft sleeve, of the drive shaft is provided with a force applying mechanism. The control switches of the force applying mechanism and the swing mechanism are electrically connected with the control panel. The shaft sleeve wear test device can realistically simulate the working state of the shaft sleeve, drives the drive shaft to swing by the swing mechanism, applies an external force to the shaft sleeve part on the drive shaft by the force applying mechanism, simulates the actual working condition of the friction force of the shaft sleeve when an excavator accessory rotates around a connecting shaft in a working state, has more realistic test data than that obtained by a wear tester, can reflect the using performance of the shaft sleeve, and canensure that the wear resistance of the shaft sleeve meets a requirement.

The disclosure discloses a system for making statistics on Point to Point Protocol (PPP) negotiation state in a wireless system, which includes at least one user terminal and a packet data serving node that realizes a communication a connection with the user terminal via the PPP, and the system further includes a base station controller and a call detail information recorder; wherein the base station controller is communicatively connected to the user terminal, and is configured to capture a PPP negotiation packet of the user terminal, analyze a PPP negotiation flow in the PPP negotiation packet and send an analysis result to the call detail information recorder; and the call detail information recorder is communicatively connected to the base station controller, and is configured to make statistics on various state data of a PPP negotiation in the wireless system according to the analysis result. The disclosure further discloses an apparatus and method for making statistics on PPP negotiation state in a wireless system. The disclosure can make statistics on a reason for the PPP negotiation failure caused by a wireless system conveniently, and accurately reflect whether performance of the whole wireless packet data system is good or poor.

The invention discloses a method for testing correlation indexes of a multiple input and multiple output (MIMO) antenna. The method comprises the following steps of: connecting each antenna and a tester through each matched load corresponding to each antenna included in the MIMO antenna; generating and sending target signals; receiving the target signals by each antenna and transmitting the received target signals to the tester by using the matched load corresponding to each antenna; acquiring the target signals sent by each antenna to obtain the test signals of each antenna and storing by the tester; and calculating the correlation indexes of the MIMO antenna according to the test signals of each antenna, which are stored in the tester. The invention also discloses a device for testing the correlation indexes of the MIMO antenna. The device comprises the matched load, a signal module, the tester and a calculation module. By adopting the method and the device, the correlation indexes of the MIMO antenna can be tested, so that the performance of the MIMO antenna can be reflected.

The invention relates to a method for measuring the interlocking capability of coarse aggregate, belonging to the technical field of road material design evaluation. The method comprises the following steps of: (1) filling coarse aggregate gravels into a rigid test barrel and ramming the coarse aggregate gravels; (2) penetrating a conical rigid squeeze head into the gravels at a certain loading speed rate, and recording a penetration depth H and a squeeze force (resistance) F suffered by the rigid squeeze head; and (3) working out a penetration power W0= the integral of Fdh from 0 to H so as to evaluate the interlocking capability of the coarse aggregate. The method evaluates the interlocking capability of the coarse aggregate grading gravels by adopting the conical squeeze head penetration test, and effectively avoids the defects in the original test methods, i.e., aggregate mixing ratio is changed and real properties of design grading can not be correctly reflected due to serious aggregate breakage in the pressing-in process. In addition, the method takes energy indexes in terms of material deformation and stress into full consideration, adopts the penetration power to evaluate the interlocking capability of the coarse aggregate and more fully reflects the whole properties of the material when compared with simpler deformation index.

The present invention relates to the automobile charging field, in particular relates to an working method of an automobile charging pile lightning arrester grounding pile detector which can measure the resistance value change during the whole thunder and lightning occurrence period and is accurate in measurement result. The automobile charging pile lightning arrester grounding pile detector comprises a main power supply module, a working power supply module and a detection module which are connected orderly, the detection module is connected with a lightning protection grounding device, the main power supply module is also connected with the detection module, and the main power supply module and the working power supply module separately supply power to the detection module. The working method of the automobile charging pile lightning arrester grounding pile detector of the present invention can more accurately determine whether the performance of the lightning protection grounding device satisfies the lightning protection requirements of the charging facilities.

The method of the present invention proposes an on-orbit test verification method for positioning based on navigation satellite leakage signals. First, determine the flight height of the on-orbit test, calculate the relative positional relationship between the detector, the navigation satellite and the earth, and calculate the relative position of any position according to the positional relationship among the three. The angle between the earth vector of the navigation satellite and the detector vector is used to judge the visibility of the navigation satellite; according to the judgment result of the navigation satellite visibility, determine the altitude range and the startup time of the spaceborne navigation receiver, and according to the judgment result of the navigation visibility , analyze the flight attitude on orbit, and determine the beam angle range of the receiving antenna of the GNSS navigation receiving equipment; on-orbit test records the reception of navigation leakage signals and navigation positioning results; compare and analyze the receiving ability of GNSS receiver navigation leakage signals and its performance on navigation The method of the present invention solves the comprehensive functional performance test of the navigation satellite leakage signal receiving equipment of deep space exploration and high-orbit earth satellites and the system design problem of using the navigation satellite leakage signal for positioning.