43results about How to "Performance pros and cons" patented technology

The invention provides a temperature experiment based fiber ring characteristics testing system, which is composed of a wide-spectrum light source for high-precision fiber gyroscope (1), a polarization-maintaining coupler (2), Y-shaped waveguides (3,4), a fiber ring to be tested (5), a quick temperature control testing box (6), high-sensitivity optical power meters (7,8,9), computer and software (10.11, 12) for data reception of computer serial port or GPIB port. The invention provides a fiber ring characteristics testing method without circuit matching based on temperature excitation experiment, which comprises: reflecting the influence of temperature change to optical signal polarization according to change of output power polarized by the Y-shaped waveguide, detecting symmetry of output signal at two ends of the fiber ring by a symmetric optical path, and detecting the influence of thermal nonreciprocal phase shift to interference effect. When applying the same testing device and testing method, the invention is capable of providing comparative index value with reliable quality of the fiber ring, and providing standard for selecting high-performance fiber ring.

The invention relates to a power quality fuzzy evaluation method processed through an improved empowerment algorithm. According to the method, first, normalization processing is performed on all indexes of power quality; appropriate indexes are selected for evaluation, wherein the indexes which are excellent all the time are not used for evaluation, and the indexes with index values smaller than 0.1 after normalization are removed; weight calculation is performed on the selected indexes, wherein an analytic hierarchy process (AHP) is adopted to perform subjective weight calculation, an improved entropy weight method is adopted to perform objective weight calculation, and then a subjective and objective composite weight is obtained through merging; the obtained composite weight is converted into a weight angle in a radar map, the area and perimeter of the radar map are obtained through calculation in combination with all single index values, and a comprehensive index evaluation value is obtained according to the area and perimeter of the radar map; and after a comprehensive index weight value is determined, the comprehensive index weight value is substituted into a membership function, and the fuzzy evaluation method is adopted to perform grading evaluation on the obtained indexes. By means of converting single indexes into a comprehensive index through an improved radar map method, comprehensive index processing is performed on power quality, and goodness and badness of the indexes can be displayed vividly.

The invention relates to an automatic parking function real vehicle test system and test method. The automatic parking function real vehicle test system comprises a vehicle subsystem, an unmanned aerial vehicle subsystem and a data processing and display subsystem. The vehicle subsystem is used for acquiring and transmitting the vehicle attitude, parking place position and obstacle position data calculated by an automatic parking controller. The unmanned aerial vehicle subsystem carrying the image sensor is used for acquiring the real vehicle attitude, parking place position and obstacle position data. The data processing and display subsystem is used for displaying the real data of the vehicle, the parking place and the obstacle and the calculation data of the automatic parking controllerin real time and can process the data and give quantitative indictors. The automatic parking function real vehicle test system and test method are convenient to move and suitable for multiple conditions, the real vehicle and the real sensor are applied to perform functional verification, the automatic parking effect can be visually displayed and the automatic parking performance can be objectively evaluated by the data processing and analysis result.

The invention relates to a method for testing a base band chip of a satellite navigation receiver. The method comprises the following steps in turn: receiving a navigation satellite radio-frequency signal and converting the radio-frequency signal into a digital intermediate-frequency signal; acquiring the obtained digital intermediate-frequency signal and converting the digital intermediate-frequency signal into a binary file; storing the obtained binary file; playing back the stored binary file to form the digital intermediate-frequency signal and transmitting the digital intermediate-frequency signal to the tested base band chip; and performing result accuracy judgment on the output of the tested base band chip. The method reduces the expense required for constructing a plurality of test platforms, and facilitates the judgment of the accuracy of the output of the to-be-tested base band chip on finer resolution.

The invention discloses a dynamic evaluation device and method for scale inhibition performances of reverse osmosis scale inhibitors. The dynamic evaluation device is characterized in that a water outlet pipeline of a raw water tank is connected to the water inlet end of a self-cleaning filter through an ultrafiltration water pump, in the water outlet pipeline of the self-cleaning filter, an ultrafiltration membrane, an ultrafiltration water tank, a reverse-osmosis low-pressure pump, a reverse osmosis cartridge filter, a reverse-osmosis high-pressure pump and a reverse osmosis membrane are sequentially arranged in series from a water outlet of the self-cleaning filter, one path of a water producing hole of the reverse osmosis membrane is connected to a total reflux inlet A, and the other path of the water producing hole of the reverse osmosis membrane is connected to a water collecting tank, one path of a concentrated water hole of the reverse osmosis membrane is communicated with the total reflux inlet A, and the other path of the concentrated water hole of the reverse osmosis membrane is connected to the water collecting tank; and the total reflux inlet A is connected with the ultrafiltration water tank to form reflux. The device and the method can determine the maximal yield of a reverse osmosis system under determined evaluation conditions, determine the advantages and disadvantages of the scale inhibition performances of the different scale inhibitors under the same operation condition, and determine the scale inhibition performances of the scale inhibitors on different scaled materials.

The present application discloses a signal error warning method, and relates to the field of communication technologies. The method includes that: an optical module receives an optical signal sent byan optical fiber through a line side interface, converts the optical signal into a digital signal, and sends the digital signal to an FEC module; the FEC module counts the number of errors in the digital signal, and calculates the error rate of the digital signal. When the error rate is lower than a preset threshold, the digital signal is corrected, and the error-corrected digital signal is sent to a PCS module, and when the error rate is higher than the preset threshold, the error alarming is performed. The present application solves the problem that if the digital signal has an error, the processing device may have a processing error; when the error rate is lower than the preset threshold, the error-corrected digital signal is sent to the processing device, and when the error rate is higher than the preset threshold, the error alarm is sent to remind the technician to perform the fiber maintenance.

The invention discloses an electromagnetic valve detection method and an electromagnetic valve detection device for a main steam isolation valve of a nuclear power plant. The detection method comprises the following steps: an electromagnetic valve to be detected is connected in series to a detection circuit, and the detection circuit detects a curve of change of current with time in the closing and releasing process of the electromagnetic valve and gets an operating current IA value and a rated current IC value; and the performance state of the electromagnetic valve is judged according to the ratio of the operating current to the rated current. The detection device comprises a direct-current power supply, a standard resistor and a voltage detection mechanism. The direct-current power supply, the electromagnetic valve to be detected and the standard resistor are connected in series into a loop through a wire, and the voltage detection mechanism is connected in parallel to the two ends of the standard resistor. The detection method of the invention can be used for accurately judging the performance of the electromagnetic valve, has a clear judgment standard on the time of action and the spring adjustment strength of the electromagnetic valve, and is simple and reliable in operation. The detection device has the advantages of simple structure, reliable detection and convenient use.

The invention relates to a context information processing-oriented QoX quality-system system and a working method thereof. The system includes a quality-of-device (QoD) module, a quality-of-context (QoC) module, a quality-of-service (QoS) module and a quality-of-experience (QoE) module. The quality-of-service module calculates QoS parameters of system service, generates corresponding adjustment information, and delivers the same to the quality-of-device module. The quality-of-device module selects a collection device, which meets system requirements, according to the adjustment information. The quality-of-experience module acquires a QoE index of a user on entire application service, generates feedback information, and sends the same to the quality-of-context module. The quality-of-contextmodule adjusts a preset QoC value according to the feedback information to form self-adaptive closed-loop regulation. According to the system, QoX is defined as a hierarchical comprehensive quality index of fusing QoD, QoC, QoS and QoE, and is used to express an overall quality level of a target system and measure advantages and disadvantages of system performance.

The invention belongs to the technical field of test equipment of a hydraulic system in coal mine heading equipment, particularly relates to a hydraulic multifunctional test stand for a heading machine, and solves the problems that working hours are wasted and pollution to the system is caused due to the fact that the test device for the hydraulic system for the heading machine is absent in the prior art, and the hydraulic system is required to be mounted on the whole machine for debugging. The hydraulic multifunctional test stand comprises a main test module unit which comprises a hydraulic pump test module, a hydraulic motor test module, a hydraulic oil cylinder test module and a hydraulic valve test module. According to the hydraulic multifunctional test stand, early-stage component test research is provided for the heading machine in aspect of an advanced technology, and a design and development period of the whole machine is shortened, so that the product seizes the market in first time. Meanwhile, using performances of key components of the heading machine also can be improved, so that the reliability of the whole machine is improved, the maximal effect of the heading machine is brought into play, and the core competitive capacity, on the market, of the heading machine product is improved. The hydraulic multifunctional test stand has a relatively great market prospect.

The invention discloses a complex event processing system based on machine learning and a deploying method of the complex event processing system. The complex event processing system comprises an event detection algorithm managing module, a system feature extracting module, a deployment scheme managing module, a system deploying module, a user feedback acquiring module and an environment feature extracting module. The deploying method comprises the following steps: at first, the event detection algorithm managing module and the system feature extracting module are informed of business rules to be customized and system response requirement according to the business rules customized by a user; and then the system deploying module takes the charge of deploying the scheme selected by the deployment managing module, the user feedback acquiring module distributes user identification for captured system response, the environment feature extracting module acquires the features of the current environment, and the deployment scheme managing module optimizes the current deployment scheme. According to the complex event processing system based on machine learning and the deploying method of the complex event processing system, the deploying method can be optimized according to the deployment environment, and the complex event processing system which meets the demands of the deployment environment can be deployed.

The invention discloses a shopping mall cold load prediction method and system oriented to function partitions, and the method comprises the steps: completing the division of the function partitions according to a target shopping mall building plan and business state space layout, and completing the screening of key influence factors of each function partition according to gray correlation analysis; and establishing an Attention-LSTM cold load prediction model improved based on an attention mechanism; seeking optimal parameters of the cold load model through grid search and a cross validation method; and independently completing regional cold load prediction by each function partition, and finally obtaining a cold load prediction result of the whole shopping mall building through a prediction result summation instruction. According to the functional partition-oriented shopping mall cold load prediction, the fluctuation characteristics of the building cold load are highly extracted, and the problem that in the prior art, shopping mall cold load data have the characteristics of high dimension, nonlinearity, high delay and strong time-varying performance is solved. Therefore, the air-conditioning system can effectively track the load change, and a powerful control basis is provided for the energy efficiency research of the transmission and distribution cooling multi-stage pump system, so that the indoor thermal environment is improved, and the air-conditioning energy consumption is reduced.

The invention discloses a lightning arrester with a counting function, mainly applied to an overhead insulation lead; the overhead insulation lead is provided with an insulator and a puncturing wire clamp pole. The lightning arrester comprises a series gap lightning arrester and a support; the series gap lightning arrester is composed of a lightning arrester body, and the puncturing wire clamp pole keeping a certain distance with one end of the lightning arrester body; the other end of the lightning arrester body is installed on one side of the insulator through a support; the lightning arrester body is also in connection with a counter, and the lightning arrester body and the counter are integrated. Compared with the prior art, the lightning arrester has the characteristics of simple structure, lower cost and convenient installation and maintenance, and avoids aging and cracking of the lightning arrester body and prolongs the service life of the lightning arrester body; the series gap lightning arrester has a gap distance, so that even the lightning arrester body breaks down, an apparatus can operate normally.

The invention discloses a shock absorber performance evaluation method according to the action of a vehicle supporting spring and the working principle of a shock absorber. According to the method, adifference value obtained by subtracting a set supporting force value or an equivalent supporting force value of the supporting spring at the current travel position from the gravity of a vehicle bodypart supported by the supporting spring is used as a basis for calculating a reference force value of a tensile damping force value or a compression damping force value of the shock absorber at the current travel position; and the reference force value of the shock absorber at the travel position is used as a basis for controlling or setting the damping force value of the shock absorber and as abasis for determining the performance of the shock absorber. By means of the method, the comfort degree obtained after the shock absorber, the supporting spring and the vehicle weight after matching can be visually determined, and debugging of a vehicle suspension and selection and matching of the shock absorber and the supporting spring become easier; and meanwhile, an optimal damping control scheme of the shock absorber is disclosed, so that the problem of how to realize optimal damping of the shock absorber, which perplexes the shock absorber industry for a long time, is solved.

The invention provides a preprocessing method of input intermediate-frequency signals. The invention mainly aims to solve the problem that the output performance of a solid-state receiving and transmitting assembly cannot be tested at the absence of no special testing instrument or radar signal processing software or hardware in the prior art. According to the technical schemes of the invention, the method comprises the following steps that: radar real echo signals received by an antenna are converted into multiple paths of digital differential signals through analog intermediate frequency signals obtained through down-conversion of a solid-state transceiving assembly; importing the differential signals into an MATLAB simulation system, and performing down-conversion to obtain baseband signals; carrying out clutter suppression processing on the echo signal condition of the baseband digital signals, and carrying out sidelobe suppression through time domain pulse pressure processing and windowing; suppressing static clutters, sea waves, rain and snow near zero frequency through moving target detection; and selecting different constant false alarm detectors according to echo edge clutter and noise conditions, performing clutter suppression, and displaying a result on a terminal. According to the preprocessing method of the invention, the performance test of the solid-state transceiving assembly can be realized at the absence of special test instrument and radar signal processing software and hardware.

The in-band digital wireless telephone is formed from two portions of mother machine and submachine. Its circuit portion is formed from control circuit, digital signal processing circuit, radio-frequency receiving and transmitting circuit, speech receiving and transmitting circuit, storage circuit, display circuit, keyboard input circuit, A/D converter circuit, interface circuit and power supply circuit which are mutually electrically connected together. Said invention integrates the modern digital signal processing techniques of speech coding, channel coding, digital modulation and demodulation and digital channel equalization into one body, and adopts monolithic integrated circuit chip to implement said invention, so that it can obtain high session quality, etc.

The invention relates to a program-controlled load impedance switching circuit for a low-voltage power line. The program-controlled load impedance switching circuit comprises a low-pass isolation attenuator, a central control circuit, a load impedance switching device, and a digital tube display; a strong current input port and a USB power supply port are arranged at an input end of the load impedance switching device, an output end of the load impedance switching device is connected with the low-pass isolation attenuator, and the load impedance switching device is connected with the digital tube display through the central control circuit. The program-controlled load impedance switching circuit disclosed by the invention can conveniently accomplish the impedance adjusting on the low-voltage power carrier detection environment. The impedance is controllable when the low-voltage power detection is performed, the operation is simple, and effective data support is provided for researchinglow-voltage power line communication signal quality; particularly, various impedances environments of the power line can be simulated by using the device in the construction of a state grid power utilization information collection system, thereby effectively detecting the performance advantages and disadvantages of a carrier product under different power line loads.

The embodiment of the invention discloses a testing method and device of an algorithm library, a storage medium and electronic equipment. The method comprises the steps of obtaining an image of a scene where the electronic equipment is located when testing of the algorithm library is needed, obtaining feature points in the scene and determining first position information of the feature points, regarding the image as testing data to test the algorithm library, determining second position information in algorithm processing in the testing result, and calculating the precision of the algorithm library according to the first position information and the second position information. According to the embodiment, the precision of the algorithm library can be calculated by contrasting the actual positions of the feature points in the scene with positions output after the calculation of the algorithm library, and therefore the performance advantages and disadvantages of different algorithm libraries can be quickly and efficiently contrasted without manual checking.