一项从CAA到CAD的工作 ～正交优化法与SPICE相结合

电子电路的计算机辅助设计方法是促进电子技术发展的一种有效工具。本文介绍如何将行之有效的正交优化法与国际盛行的模拟电子电路的分析程序ＳＰＩＣＥ相结合，形成了ＡＣＯＤ软件，将ＣＡＡ扩展为ＣＡＤ。     

铝基印制电路板制造工艺研究

此文对一种进口铝基印制电路板的制造工艺流程进行了介绍,对所采用的制造工艺技术进行了较为详细的论述。     

对未来我国覆铜板业技术发展的战略与任务的探讨

对未来十年我国覆铜板业技术发展的战略与技术开发重点任务进行了探讨。     

一种高并行度的H.264帧内预测器的VLSI设计

分析了帧内预测的17种模式,对于每个4×4大小块的16个像素点的不同模式的预测公式之间的相同运算,采用数字强度缩减的方法去除计算的冗余,提出了一种高并行度的帧内预测器,可以每个时钟周期处理16个像素点的预测值。基于SMIC0.18μm工艺,用verilog对该设计进行了VLSI实现,综合后的电路的关键路径最大时延为10ns,电路规模不超过1.4万门,数据吞吐率可以达到1600Msamples/s。从实现结果来看,与采用可重构方法的设计相比,该设计在相同的并行度下减小了电路面积,简化了控制逻辑。     

光刻技术及其新进展

介绍了用于制作半导体集成电路的光刻工艺的概念、分类及发展过程，阐述了当前光刻工艺的主流，并重点介绍了极紫外光刻、X射线光刻、电子束光刻、离子束光刻、纳米图形转印等下一代光刻技术的特点及其面临的挑战。     

集成电路的现状及其发展趋势

集成电路是信息社会经济发展的基石。通过对集成电路发展规律的分析,从集成电路的设计、制造、新产品研发和市场动态等方面,描述了集成电路的最新动态;探讨了集成电路的发展趋势;指出集成电路与其它学科、技术的结合,不断形成新的研究方向;新材料、新结构、新器件不断涌现,特征尺寸继续缩小,摩尔定律仍然起作用。     

一种简易的手工网印序号工艺法

通过一种简易的手工丝印序号工艺法,可以连续完成逐张PCB的序号印制且质量稳定。     

开关型霍尔传感器的原理与工程实现

介绍了开关型霍尔传感器的工作原理，设计了适用于工程测量的具体线路，并分析了该线路的特点。     

Symmetry specified enumeration of substituted derivatives: an easy solution to the complex problem

Several sophisticated methods to solution of symmetry specified enumeration problems are available in the modern literature. In this paper we propose a simple technique that allows one to manually compute the exact numbers of fixed-symmetry derivatives for a given structure either with inclusion or ignoring the substitution patterns. The basic idea of the method suggested consists in the derivation of Pólya-like cycle indices for the automorphism groups of specially constructed orbit partition graphs; the expansion of these indices and subsequent simple calculations result in the desired numbers of substituted derivatives with achiral substituents. Limitations of the new technique (and a method suggested earlier) depend on the relevance of the orbit partitions for particular subgroups of the point symmetry group. For illustration purposes, the results obtained for the prismane (D _3h ) and adamantane (T _d ) structures are discussed. In the former case the numbers of substituted derivatives can be found for all subgroups of the D _3h group, whereas in the latter case these numbers can be determined for eight out of eleven subgroups of the T _d point symmetry group. This work is based on the text of the lecture presented by the authors at the 5th All-Russia Conference on Molecular Modeling (Moscow, April 2007). The paper deals with the methodology and detailed treatment of applied aspects related to solution of enumeration problems for substituted derivatives with prescribed symmetry groups. Unlike the known methods of symmetry specified enumeration, the technique suggested is simple enough and may be regarded as generalization of the Pólya methodology, which is widely used by chemists. Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 2, pp. 227–245, February, 2008.     

基于HMS87C1408B的籽棉、菜籽和粮食水分综合测试仪

介绍了使用HMS87C1408B作为主控芯片的籽棉、菜籽和粮食水分综合测试仪的实现方法,重点说明了阻抗变换、软件驱动LCD和语音播报技术的实施.