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县乡(镇)HFC升级联网回传的一种系统网络构造
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作者 苏桂森 王绍强 董长青 《有线电视技术》 2001年第23期54-54,共1页
目前,县乡有线电视网基本上都是单向传输的电缆网,随着有线电视事业的发展,这些旧网将逐步被交互式HFC光电混合网所取代,信息回传系统的设计,将成为系统改造面临的新问题.
关键词 HFC网 联网回传 通信网 系统网络构造 接入网
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Web-Based Synthetic Optimization Design System of Micro-Components
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作者 GONG Xiao-yan JIANG Ping-yu 《Journal of China University of Mining and Technology》 EI 2005年第4期293-298,共6页
In order to meet the requirement of network synthesis optimization design for a micro component, a three-level information frame and functional module based on web was proposed. Firstly, the finite element method (FE... In order to meet the requirement of network synthesis optimization design for a micro component, a three-level information frame and functional module based on web was proposed. Firstly, the finite element method (FEM) was used to analyze the dynamic property of coupled-energy-domain of virtual prototype instances and to obtain some optimal information data. Secondly, the rough set theory (RST) and the genetic algorithm (GA) were used to work out the reduction of attributes and the acquisition of principle of optimality and to confirm key variable and restriction condition in the synthesis optimization design. Finally, the regression analysis (RA) and GA were used to establish the synthesis optimization design model and carry on the optimization design. A corresponding prototype system was also developed and the synthesis optimization design of a thermal actuated micro-pump was carded out as a demonstration in this paper. 展开更多
关键词 micro-component synthetic optimization design finite element method rough set theory genetic algorithm regression analysis
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