浅谈卧式螺旋活套

介绍了卧式螺旋活套的结构、工作原理、工作状态及主要技术参数。     

加强砼质量管理 治理质量通病

文中系统分析,混凝土质量通病的原因,并提出了治理措施。     

Register allocation and exhaustive peephole optimization

Emerging peephole optimizers can relieve code generators of much case analysis, but delaying code generation decisions requires register allocation algorithms that accept object code instead of the more usual intermediate code. This paper describes two programs that implement such algorithms for a retargetable optimizing compiler. In a machine-independent fashion, they allocate and assign registers, eliminate common subexpressions (including often-missed machine-specific ones), identify dead variables, and define windows for the companion peephole optimizer. Their techniques for handling machine-specific data should generalize to other optimizations as well.     

利用氧、氮低温等离子体对醋酸纤维素超滤膜进行表面改性的比较

醋酸纤维素超滤膜经氧、氮等低温等离子体处理后，能在适宜条件下保持原有截留率的基础上，提高透水率。但氧低温等离子体比氮低温等离子要温和一些。     

感应同步器数字式激磁电源的正交性分析

对感应同步器数字式双相激磁电源中正弦、余弦的相位正变性能和正交偏差进行了深入的分析，为进一步提高其两相的正交度提供了理论基础．     

一种内嵌式矢量汉字支撑系统—PD环境下的CVHZ5汉字系统的实现

本文针对功能很强的ＰＤ软件（即ＭＩＣＲＯＣＡＤＤＳ）中汉字标注极不方便的缺陷，用其内嵌的用户编程语言ＵＰＬ开发一套有汉语拼音和常用图形，符号输入功能的内嵌式矢量汉字系统，为ＰＤ软件在我国的推广应用提供了良好的汉字支持。     

谱估计方法的通用矩阵表示与新的谱估计方法

本文指出几种常见的谱估计方法可以归结为同一数学问题并可用同一矩阵方程表示。从这通用矩阵表示可导出许多新的谱估计方法。本文还具体研究了相关阵特征矢量空间谱估计方法,得出一些有益的结论。     

高级小字库技术

本文介绍了一些小字库的高级技术，包括静态排序、对分搜索、动态维护、驻留ＶＲＡＭ等。应用这些技术可大大提高西文方式下显示汉字的效率。文末给出了用Ｃ语言实现的动态维护及驻留ＶＲＡＭ程序。     

A countryside character programme

The English countryside has been a source of inspiration and pleasure for many generations, yet no organisation has so far attempted to provide a comprehensive and celebratory record of this resource. The Countryside Commission has recently completed a pilot study which has established a method for mapping zones of similar character at the regional and local scales. This study is soon to be extended into a Countryside Character Programme covering the whole of England. This article describes the qualitative and quantitative techniques used in the exercise, and discusses the nature and significance of its expected outputs.     

Machine recognition of printed Chinese characters via transformation algorithms

This paper presents some novel results concerning the recognition of single-font printed Chinese characters via the transformation algorithms of Fourier, Hadamard, and Rapid. The new design philosophy of a three-stage structure is believed to offer at least a suboptimal search strategy for recognizing printed Chinese characters with a dictionary of 7000–8000 characters. The transformation algorithms discussed in this paper will be used in the last two stages. Extensive experiments and simulations concerning feature extraction and noisy or abnormal pattern recognition have been carried out (the simulations have been restricted to a 63-character subset called “Radicals”). Comparison has been made of all three transforms according to their ability to recognize characters.