面向表面微加工工艺的微器件设计框架的研究

本文以微器件设计为对象，对微硅表面制造驱动的微器件并行设计方法学及相应的计算机辅助设计工具的开发逻辑进行了研究，提出了采用基于三层Web-ASP集成框架实现e-CAD原型工具的编程方案，其中，并行任务流管理与控制，微器件实例及设计资源库，微加工工艺规划及仿真，微器件设计评价等是该系统实现的关键要素，在此基础上将建立网上微器件设计中心，并通过应用服务机制，实现对微器件设计工具使用的商务化，以达到降低设计成本，加快MEMS产业化之目的。     

自旋式脱接器在临盘油田的应用

为保障临盘采油厂的大泵井正常生产 ,购进了自旋式脱接器。这种脱接器由上体和下体两部分组成 ,上体包括轨道管和轨道套 ;下体包括接头、挡圈、弹簧、滑套和中心杆。自旋式脱接器可在任意位置和角度对接和脱开 ,对接和脱开时只需下放和上提抽油杆柱即可完成。当泵砂卡时 ,左旋抽油杆柱即可脱开 ,解决了砂卡井脱接器不能脱开的难题。该脱接器可重复对接12 0次以上 ,耐疲劳寿命 7× 10 7次以上     

高速往复式内燃机平衡轴低质量设计分析

分析了扇形和偏心圆两种平衡轴设计的要求以及平衡重低质量的设计原则。扇形平衡重半径及宽度应尽量大、夹角应尽量小。偏心圆平衡重的偏心圆半径应尽可能大 ,轴承半径应尽可能小。同样质量的扇形平衡重产生的平衡力比偏心圆平衡重要大。     

局部设有钢筋砼电梯井墙的设计探讨

本文就局部设有钢筋砼电梯井的工程计算及理论分析，阐明分析了少墙的框剪结构的设计及注意问题。     

Overview of ship-design expert systems

Expert systems constitute a branch of artificial intelligence, and their unique characteristics enable computer systems to perform at the level of a human expert by the use of algorithms that can capture domain-specific knowledge. Through an extensive survey of research about ship-design expert systems, we conclude that although development and implementation of expert systems for ship design offer substantial barriers, the shipbuilding industry needs them nonetheless. We examine the major reasons that use of expert systems in this industry has lagged behind. These include the problems of integration with existing computer-aided design systems, problems of knowledge representation and sizable development costs. We discuss in detail some key factors that can lead to the solution of these problems.     

Evolutionary algorithms and de novo peptide design

One of the goals of computational chemistry is the automated de novo design of bioactive molecules. Despite significant progress in computational approaches to ligand design and efficient evaluation of binding energy, novel procedures for ligand design are required. Evolutionary computation provides a new approach to this design issue. This paper presents an automated methodology for computer-aided peptide design based on evolutionary algorithms. It provides an automatic tool for peptide de novo design, based on protein surface patches defined by user. Regarding the restrictive constrains of this problem a special emphasis has been made on the design of the evolutionary algorithms implemented.     

Generation of Technology-Independent Retargetable Analog Blocks

This paper introduces a complete methodology for retargeting of analog cells to different sets of specifications. This methodology is technology-independent, thus allowing the migration, from one technology to another, of the circuit under retargeting. Careful integration of the device sizing and layout generation tasks via the incorporation of layout constraints during the sizing process allows to generate fully functional designs in a few minutes. The methodology is illustrated via the retargeting of a fully-differential Miller-compensated two-stage operational amplifier for a new set of specifications and two different technological processes.An erratum to this article can be found at     

一种新型板件连接

TOX板件冲压连接工艺是一种新的板件连接技术。作者对TOX板件冲压连接技术进行了应用研究，并取得了一些经验。主要介绍一种板件连接技术－板件冲连接工艺，较详细地叙述了其原理、应用范围及工艺要点。     

电子产品可靠性设计与成本控制

介绍了可靠性设计过程涉及的质量控制成本的解决方法，通过对最有可能影响可靠性的电路设计、元器件选用等方面的分析，介绍了在降低可靠性设计成本的基础下更好地解决可靠性问题的一些方法。     

消力池底板块的失稳破坏机理及其防护措施

本文根据国内外一些高坝消力池和水垫塘失事破坏的调查资料，说明了脉动压力在引起破坏中的作用。从理论上分析了脉动压力的基本特征及其分布规律、板块上脉动上举力的产生机理，论证了脉动上举力是导致消力池底板揭底破坏的主要原因。论述了合理设置止水设施、排水设施以及锚固措施等对防止破坏的效果，讨论了计入脉动荷载的底板块稳定性设计准则，提供了消力池底板块的设计和防护参数。