英汉"排偶"的对比及使用

本文就英语和汉语修辞格中的排偶结构进行了分析对比。笔者认为对于修词的学习研 究,有助于对原文的理解,有助于对英语文化的了解和对英语知识的巩固。     

Decentralized adaptive output regulation for a class of large-scale nonlinear systems

We address the output regulation problem for a class of large-scale nonlinear systems with a neutrally stable uncertain exosystem via a decentralized error feedback adaptive control strategy.     

Best tracking and regulation performance under control energy constraint

This paper studies optimal tracking and regulation control problems, in which objective functions of tracking error and regulated response, defined by integral square measures, are to be minimized jointly with the control effort, where the latter is measured by the plant input energy. Our primary objective in this work is to search for fundamental design limitations beyond those known to be imposed by nonminimum phase zeros, unstable poles, and time delays. For this purpose, we solve the problems explicitly by deriving analytical expressions for the best achievable performance. It is found that this performance limit depends not only on the plant nonminimum phase zeros, time delays, and unstable poles-a fact known previously-but also on the plant gain in the entire frequency range. The results thus reveal and quantify another source of fundamental performance limitations beyond those already known, which are nonexistent when only conventional performance objectives such as tracking and regulation are addressed without taking into account the control energy constraint. Among other things, they exhibit how the lightly damped poles, the anti-resonant zeros, as well as the bandwidth of the plant may affect the performance.     

金属板材无模成形加工轨迹生成的研究

介绍了一种采用快速原型制造原理的金属板材无模成形技术．根据快速成形技术中分层制造的思想，从板材无模成形的技术特点出发，采用基于STL文件的金属板材无模成形的加工轨迹生成方法，通过构造STL文件的等距模型并对其进行切片，得到加工轨迹。     

硬X射线调制望远镜(HXMT)能谱标定系统设计

提出了用于硬X射线调制望远镜的能谱标定方案，并进行了原理实验验证，同时讨论了影响能谱标定系统性能的几个因素．     

几种求作曲面交线的方法

通过实例介绍了应用辅助球面法、直线辅助投射法、空间透视仿射变换法等求作非回转曲面参与相贯的曲面交线的投影问题     

基于GSM短信息的智能温度监控系统的开发

介绍了一种以PIC系列单片机或个人电脑为控制核心的、基于GSM短信息的温度监控系统的硬件与软件设计。该系统采用了不同于一般TEXT或PDU的短信格式,具有更强的通用性和更好的可识别性。     

铝带箔精整机组圆盘剪的设计改进

本文分析了以往设计的铝带箔精整机组圆盘剪存在的问题，介绍了改进后的设计方案。新设计方案保证了圆盘剪精度的稳定性，提高了产品质量及生产效率。     

古代艺术如何融入现代包装设计

阐述了现代包装设计的产生、发展及其根源.从三个方面就如何把古代艺术有机地融入到现代包装设计中进行了探讨,以挖掘现代包装设计深厚的文化底蕴.     

从中国走向世界——嘉陵集团跨国经营战略构想

选取嘉陵集团作为我国摩托车行业的代表，分析嘉陵集团所处的内外部环境、面临的挑战与机会，结合其具体情况，提出了嘉陵集团跨国经营战略。