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The common information model (CIM)/ extensive markup language (XML) was taken as the carrier to realize the mutual connection interface technology of isomerized electric power simulation software. This paper raised a kind of equal value electric power network model. The corresponding properties of classes in the model were expanded to save the CIM model element objectives, which overcame the shortcomings,...
Digital watermark is a very active research area that has received a considerable amount of attention in many multimedia applications. For most watermark applications, it is often desired to retrieve the embedded information without access to the host data; this is known as blind watermark. Most of previous blind watermark schemes either suffer significantly from host data interference or require...
A W band three-section folded waveguide Traveling Wave Tube was designed and optimized by CST simulation. The design results showed nearly 200 watts output power without self-oscillation. Comparing with two-section folded waveguide, three-section folded waveguide slow wave structure can obtain higher and more stable output power even without BeO attenuation in it. So three-section folded waveguide...
Owning the characteristics of concealment and complexity etc., it is a great challenge to quickly and accurately identify the faults for computer numerical control (CNC) machine. The conventional neural network based fault diagnosis algorithms are not able to deal with human knowledge, while the fuzzy system based fault diagnosis methods face the problems of poor self-learning, poor self-organization...
Thermal error is a primary factor affecting the working accuracy of numerical control machine, whereas it can't be measured on-line. So an accurate predictive error is critical to final product quality. In order to improve the predictive accuracy of thermal error, a predictive method based on improved particle swarm optimized back propagation neural network is proposed in this paper. Because of back...
Sensorless control technology has been a hotspot in the area of BLDCM control. In this paper, a speed controller of BLDCM based on MC56F8013 was researched using BEMF-crossing-zero-detecting method, including hardware circuit and software design. Experiments were implemented and it shows that the BEMF method for detecting rotor position signal is accurate and reliable, BLDC motor can commute and run...
This paper develops a quite simple yet very accurate mathematical model for performance analysis of 802.11 ad hoc networks with traffic flow diversity (i.e., packet size and arrival rate diversity). The results show that 802.11 ad hoc networks can achieve very low packet delay and maximum throughput in non-saturated conditions. Furthermore, when the normalized total load is less than the critical...
An Improved Particle Swarm Optimization (IPSO) algorithm applied to the Reactive Power and Voltage Control of power system (RPVC)was proposed followed by the Basic Particle Swarm Optimization(BPSO). The algorithm changed the stochastic initialization into uniform initialization and adopted a principle of particle searching by itself. Several particles in feasible solutions were used to lead swarm's...
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