EDA技术在PCB设计中的发展与应用

电子设计自动化(EDA)代表了当今电子设计技术的最新发展方向。随着计算机技术和EDA软件在电路设计领域中的应用,传统的印刷电路板(PCB)设计方法已经发生变化,EDA技术已成为现代电子系统设计和电子产品研制开发的有效工具,成为电子工程师应具备的基本能力。     

道德哲学在康德哲学体系中的地位和现实价值

康德哲学以实践本质为特征,以三大批判,即《纯粹理性批判》、《实践理性批判》和《判断力批判》为主要内容构筑了完整的哲学体系。在这个体系中,先验的自我作为理性的存在,在一切伦理行为中构成绝对命令的依据,使道德成为可能。因此,道德哲学在整个哲学体系中占居主导地位,是全部哲学体系的实质和核心。康德道德哲学的最终目的就是找寻做人之道,揭示规范“人的行为”的道德“法令”,构筑“至善”的道德人格,这些思想至今仍不失其启迪价值和功效。     

日汉标点符号对比与翻译处理

日语的标点符号是为了分割语句,便于对文章的理解;汉语的标点符号是辅助文字记录语言的符号,是书面语的有机组成部分。日、汉语标点符号的形式并非对等。在翻译过程中,既要正确地使用标点,又要准确地将标点符号所表达的深层含义转换为目的语。     

萨满昏迷行为的心理学分析

在萨满教观念中,萨满能够升天入地与神交往,这主要缘自萨满能够施展昏迷术。萨满施昏迷术时显露的令人难以理喻的神秘行为及超人技能等,与催眠状态下的性状相同。催眠的手段乃是心理暗示。     

Modeling Locking Angle of the Multi-layered Biaxial Weft Knitted Fabric in Shear Deformation

This paper introduces the construction of the multi-layered biaxial weft knitted fabric （MBWK fabric） and studies the locking angle of this kind of fabric. Moreover, a locking angle model of the MBWK fabric is established for the first time according to its unique construction. Two kinds of locking angles are considered under different restraint conditions： the locking angle θ1 controlled by the inserting yarns and the locking angle θ2 controlled by the stitch yarns. It is concluded that the ultimate value of the locking angle θ is the larger one of the two angles.     

Effect of Rating Scales and Test Parts of Body on the Evaluation Results of Fabric-evoked Prickle

IntroductionThe studies of Schneider and Holcombe[1]and Liet al .[2]demonstrated that s mooth and light-weightwool fabrics were able to enhance fabrics in the market-place the sensations of coolness when worn in war m andhumid environments due to wool s hygroscopicity . Thisis the principle underlying the development of “coolwool”.However ,someti mes wool products are complainedof prickle . In the study of Wang et al .[3],it was foundthat the main shortcoming in ter ms of comfort for light…     

Analyzing Nonstationary Random Response of a SDOF System under the Evolutionary Random Excitation by Wavelet Transform

For evolutionary random excitations, a general method of analyzing nonstationary random responses of systems was presented in this paper. Firstly, for the evolutionary random excitation model, the evolutionary power spectrum density function （EPSD） of a random excitation was given by wavelet transform. Based on the EPSD, the nonstationary responses of a SDOF system subjected to evolutionary random excitations were studied. The application and validity of presented method were illustrated by numerical examples. In numerical examples, the recently developed stochastic models for El Centro （1934） and Mexico City （1985） earthquakes which preserve the nonstationary evolutions of amplitude and frequency content of ground accelerations were used as excitations. The nonstationary random mean-square responses of a SDOF system under these two excitations were evaluated and compared with simulated results.     

颊(舌)侧(牙合)支托在活动义齿修复中的临床应用分析

目的:探讨活动义齿修复中颊舌侧支托临床应用的可行性。方法:选取我院在1999年至2000年71例活动义齿修复患者,在修复体中设计颊舌侧支托84个,对其临床效果评价。结果:本组病例中66例颊舌侧支托成功使用3年以上,5例失败。结论:在活动义齿修复中设计颊舌侧支托是可行的。     

W类态三纠缠原子与二项式光场相互作用过程中光场的量子特性

采用全量子理论, 研究处于W类态的三纠缠原子与二项式光场相互作用过程中光场的量子特性; 运用数值方法, 讨论了三纠缠原子初始状态和二项式光场系数对系统光场压缩和二阶相干特性的影响.     

基于混合编码框架的H.264/AVC核心新技术

介绍了H.264独有的特点,包括帧内预测、整数余弦变换、二进制自适应算术编码、概念性网络适配、多种块尺寸运动搜索、1/8像素运动估计精度等。