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Based on the characters of repulsive force actuator for its fast speed in the opening and closing process, a kind of new-type fast circuit breaker energized by fault current was designed in this paper. With bus shunt as excitation current, double coil tandem repulsive force actuator and permanent magnetic actuator were composed together. This hybrid circuit breaker with new-type of excitation doesn't...
Non‐homogeneity of permeability largely depends on heterogeneity of the pore structure of waste in a landfill, which contributes to variation in gas flow state. Gas pressure dropping test (GPDT) was one of the most effective methods to describe the gas preferential flow, was used to investigate the gas breakthrough curves in initial pressures, moisture contents and degradation phases in lab test....
Testing of Multi Phase High Power Permanent Magnet Synchronous Motor (PMSM) having multiple units is a difficult task. In this paper, prediction problems to obtain the overall characteristics for such motor under limited experimental conditions have been analyzed. A simplified testing model of the motor is established for testing of the overall characteristics and calculation methods were studied...
In order to deal with the issues of implicit limit state function and high computational cost in the mechanism reliability analysis, the methodology for predicting the failure probability of mechanism by combining simulation technology and support vector machine (SVM) based reliability analysis is introduced. Then, two strategies of mechanism reliability analysis using support vector machine are proposed,...
With the extension of wireless technology, vehicular ad hoc networks (VANETs) provide general data transmission services and emergency warning services. To rescue more drivers from being involved in an emergency event on the road, fast emergency message propagation is an important issue in VANET studies. There are two types of multi-hop broadcasting forwarder selection schemes for emergency broadcasting,...
A new approach to autonomous pursuit evasion by a wheeled mobile robot in the presence of wheel slip is presented. Classical pursuit evasion problem, such as the Homicidal Chauffeur problem, considers the kinematic model of the pursuer and does not consider slip in its trajectory, and thus cannot predict a realistic pursuit evasion scenario. In this work we present a new dynamics-based approach to...
This paper describes a design of an inductor-less variable gain amplifier (VGA) for UWB systems in a standard digital 0.18 ??m CMOS technology. The VGA is implemented using four-stage modified Cherry-Hopper amplifier, and by changing the value of the feedback resistors in the Cherry-Hopper amplifiers, a variable gain from -17.4 dB to 52.7 dB can be obtained. The DC offset is reduced effectively by...
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