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高速PCB信号完整性仿真分析 总被引:1,自引:0,他引:1
随着PCB设计越来越复杂,设计周期越来越短,信号完整性仿真分析正变得越来越重要.本文简介了信号完整性针对的基本问题.介绍了基于信号完整性仿真分析的高速PCB设计方法,并结合一个高速PCB设计案例,给出仿真分析的流程和分析结果. 相似文献
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基于信号完整性的高速数据采集传输系统设计 总被引:1,自引:0,他引:1
高速PCB设计中必须面对信号完整性问题,并采取有效措施;基于信号完整性分析的高速PCB设计流程能够缩短产品开发周期,降低开发成本;根据这个流程设计了一个高速数据采集传输系统,仿真结果表明电路的信号完整性问题得到了改善,对数据采集系统的性能进行测试后表明AD的动态有效位数达到了10位;说明了在高速电路设计中采用基于信号完整性仿真设计是必要的,也是可行的。 相似文献
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梁龙 《单片机与嵌入式系统应用》2010,(10):12-14,17
在高速PCB设计过程中,仅仅依靠个人经验布线,往往存在巨大的局限性。介绍利用Cadence软件对高速PCB进行信号完整性仿真。结合以CycloneⅡ为核心的远距离无线通信系统控制模块的PCB设计,利用Cadence的SPEEC-TRAQuest,提取器件的IBIS模型,确定关键信号线的拓扑结构,做信号完整性仿真。依靠仿真结果指导设计和制作,极大地提高了电路设计质量,缩短了研发周期。本文主要介绍反射和串扰仿真。 相似文献
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Recent years have seen rapid advances in various grid-related technologies, middleware, and applications. The GCC conference has become one of the largest scientific events worldwide in grid and cooperative computing. The 6th international conference on grid and cooperative computing (GCC2007) Sponsored by China Computer Federation (CCF),Institute of Computing Technology, Chinese Academy of Sciences (ICT) and Xinjiang University ,and in Cooperation with IEEE Computer Soceity ,is to be held from August 16 to 18, 2007 in Urumchi, Xinjiang, China. 相似文献
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本文分析了法律数据库的结构和特点,介绍了采用面向对象设计方法和超文本数据库技术开发和实现法律信息库系统将作为重要网络资源之一为不同用户进行法律咨询服务。 相似文献
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《中国科学:信息科学(英文版)》2014,(8)
正SCIENCE CHINA Information Sciences(Sci China Inf Sci),cosponsored by the Chinese Academy of Sciences and the National Natural Science Foundation of China,and published by Science China Press,is committed to publishing highquality,original results of both basic and applied research in all areas of information sciences,including computer science and technology;systems science,control science and engineering(published in Issues with odd numbers);information and communication engineering;electronic science and technology(published in Issues with even numbers).Sci China Inf Sci is published monthly in both print and electronic forms.It is indexed by Academic OneFile,Astrophysics Data System(ADS),CSA,Cabells,Current Contents/Engineering,Computing and Technology,DBLP,Digital Mathematics Registry,Earthquake Engineering Abstracts,Engineering Index,Engineered Materials Abstracts,Gale,Google,INSPEC,Journal Citation Reports/Science Edition,Mathematical Reviews,OCLC,ProQuest,SCOPUS,Science Citation Index Expanded,Summon by Serial Solutions,VINITI,Zentralblatt MATH. 相似文献
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正Erratum to:J Zhejiang Univ-Sci C(ComputElectron)2014 15(7):551-563doi:10.1631/jzus.C1300320The original version of this article unfortunately contained mistakes.Algorithm 6 should be as follows:Algorithm 6 FGKFCM-F clustering Input:(1)X={x_1,x_2,…,x_N},,x_iR~d,i=1,2,…,N,the dataset;(2)C,1C≤N,the number of clusters;(3)ε0,the stopping criterion; 相似文献
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磨矿过程的大滞后和时变性等特点,致使对磨机负荷的最佳工作点很难进行稳定、高效的控制,针对以上情况,借鉴生物界的免疫反馈原理和遗传算法,利用模糊控制可以有效地实现对非线性、纯滞后、复杂的对象进行控制的优点,并结合PID与自寻优方法,设计出磨机负荷专家控制系统,用VB编写OPC客户端及控制程序,实现对磨机负荷的动态优化控制;试验结果表明,文章提出的控制策略能够增强系统的稳定性,且在干扰存在的情况下也能很好的跟随系统的参数变化,在提高磨机台时产量的同时增加了矿厂的经济效益. 相似文献
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由于无线传感器网络中的节点链路状况、数据传输能耗及节点剩余能量的限制,造成网络中部分感知节点寿命缩短,影响网络生存周期,提出了一种基于人工蜂群算法的WSNs能耗均衡算法,优化网络能耗均衡,从而提高网络寿命;文章给出了网络能耗相应的数学模型及优化求解算法,介绍人工蜂群算法的寻找食物过程,阐述了人工蜂群算法在网络能耗均衡方面的实现步骤;通过实验仿真证明,文章提到的算法与LEACH分簇算法、蚁群优化算法相比,具有更好的能耗和负载均衡能量、丢包率和时延性,有效地提高了网络生存周期. 相似文献
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All available thermodynamic and phase diagram data of the binary Al–Bi and Al–Sb systems and ternary Mg–Al–Bi and Mg–Al–Sb systems were critically evaluated, and all reliable data were used simultaneously to obtain the best set of the model parameters for each ternary system. The Modified Quasichemical Model used for the liquid solution shows a high predictive capacity for the ternary systems. The ternary liquid miscibility gaps in the Mg–Al–Bi and Mg–Al–Sb systems resulting from the ordering behaviour of the liquid solutions can be well reproduced with one additional ternary parameter. Using the optimized model parameters, the experimentally unexplored portions of the Mg–Al–Bi and Mg–Al–Sb ternary phase diagrams were more reasonably predicted. All calculations were performed using the FactSage thermochemical software package. 相似文献