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

The invention belongs to the field of the thermoelectric refrigeration field, and specifically discloses a thermoelectric refrigeration module life prediction method and device. The method comprises the following steps: accessing a thermoelectric refrigeration module into a work power supply, wherein the thermoelectric refrigeration module performs work according to experienced work-intermittent cycle number, and acquires the stable temperature at hot and cool ends in the work; and then accessing the thermoelectric refrigeration module to a test power supply, acquiring the voltage at the stable work, and measuring the residual voltage at the moment of switching off the test power supply, and computing a thermoelectric optimal value through the voltage and residual voltage of the thermoelectric refrigeration module in stable work, thereby judging the effectiveness of the thermoelectric refrigeration module; and finally predicting the residual life cycle number of the thermoelectric refrigeration module by combining the stable temperature at hot and cool ends, the experienced work-intermittent cycle number and the preset critical thermoelectric optimal value. The related data in theprediction method is easy to acquire, the processing method is simple and convenient, and the method can be applied to the life prediction of the thermoelectric refrigeration module at the long-term stable work occasion, and is in favor of more extensive application of the thermoelectric refrigeration module.

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 outputsignal 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 present invention is an in-band co-frequency digital cordless telephone, which consists of two parts: a main machine and a slave machine, and its circuit part consists of a control circuit, a digital signal processing circuit, a radio frequency transceiver circuit, a voice transceiver circuit, a storage circuit, a display circuit, and a keyboard input circuit , analog-to-digital conversion circuit, interface circuit and power supply circuit are electrically connected to each other. The present invention adopts the same frequency band as the existing analog cordless telephone in my country, can save precious frequency spectrum resources, greatly reduces requirements on required components and production and testing equipment, and has low cost. The present invention integrates the latest digital signal processing technologies such as speech coding, channel coding, digital modulation and demodulation, and digital channel equalization, and adopts a single-chip integrated circuit chip to realize the advantages of good call quality, high spectrum utilization rate, strong anti-interference, It has the advantages of good confidentiality, easy product update and function expansion, and can be compatible with the third-generation mobile communication system.

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 cutting and conveying performance test bench of a sugarcane harvester cutting system. The test bench comprises an overturning roller device, a cutting table device, a conveying sectioning device, a test bench frame, a connecting rod, soil bin tracks, a trolley, soil, and a rotating driving mechanism; the overturning roller device, the cutting table device, the cutting table device and the conveying sectioning device with adjustable rotating speed are orderly arranged; the test bench frame is connected with the trolley through the connecting rod, the test bench frame and the trolley are run on the soil bin tracks, and the soil is arranged between the soil bin tracks; the conveying sectioning device comprises a front section and a rear section, the rear section is fixed with the test bench frame, and the front section rotates in relative to the rear section through the rotating driving mechanism; the overturning roller device location is adjustably connected with the front section of the conveying sectioning device, and the cutting table device is arranged at the front section of the conveying sectioning device. The test bench further relates to a test method of the cutting and conveying performance test bench of the sugarcane harvester cutting system. Multiple parameters are adjustable, the test bench provides reference for the design and optimization of the cutting system, and belongs to the technical field of the agricultural machinery test bench.

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 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.