变电站基础设计及不良地基处理

变电站基础设计是变电站施工设计优化的重点。文章针对变电站建筑物的不同特点，介绍了几种对变电站不良地基进行处理的方法。     

优化矿井斜井人车的结构有效提高其防坠性能

本文以现有矿井使用的XRC型插爪式斜井人车为例,对其存在的不合理的结构进行了改进,在有效提高了斜井人车的防坠安全可靠性的同时降低了人车的维护成本。从根本上解决了斜井人车存在的问题,有利于矿井安全、高效、快捷的提升作业。     

计轴自动站间闭塞结合电路的改进

针对计轴自动站间闭塞结合电路中存在区间设备故障不关闭出发信号的联锁失效安全隐患进行了成因分析,提出了电路改进方案,并在现场设备中进行实际应用,证明了其可行性。     

Optimal nested row-column designs for blocks of size 2×2 under dependence

This paper examines nested 2 ×2 row-column designs when within-block observations are assumed to be dependent. The model considered has fixed block effects, which may also include row and/or column effects. Optimal binary and non-binary designs, constructed from semi-balanced arrays, are given under both generalised and ordinary least squares estimation. It is shown that binary designs are optimal when dependence is low. In general, however, the optimal designs are highly specific to the correlation values. Received: October 1999     

DL/I技术浅析

本文针对ＩＢＭ公司ＤＬ／Ｉ数据库的数据模式、程序调用、出错信息等方面，详细论述其定义和格式，以及程序调用的一些技巧。     

A note on generalized aberration in factorial designs

In this paper we extend the wordlength pattern and minimum aberration for non-regular factorials. The new concepts, the generalized wordlength pattern and minimum generalized aberration, are proposed. Some connections between the generalized wordlength pattern and uniformity are given. Some applications of the new concepts in the Blackett and Burman's designs are discussed. Received: September 2000     

基于原型衍生针织女装基础样板的构成与应用综述

业内认为:运用基础样板解决服装结构设计中的问题,不失为一种简单而有效的方法。通过两种不同类型针织女上装基础样板的比对,详细阐述了基础样板的来源、成型过程和使用方法,并运用三款典型实例验证了基础样板的实用价值和现实意义。     

Modelling seasonality in residential water demand: the case of Tunisia

This article proposes to model seasonal patterns of residential water demand using the techniques of seasonal integration and cointegration. The methodology is applied to quarterly aggregate time series data for Tunisia (1980–2007), applying the same increasing, multi-step pricing scheme in the whole country. First, a seasonal cointegration analysis demonstrates the relevance of a pricing policy that increases the size of the lower consumption block in summer. Second, the nonseasonal cointegration analysis reveals a relatively high price elasticity for the highest consumption block. Therefore, we also propose to increase the tariff progressivity to promote water savings. This modified pricing scheme will help to achieve goals of environmental protection and social equity.     

强夯法在新近填土地基加固工程中的应用

万科四季花城五期的新近高填土地基采用分层强夯及强夯置换块石墩进行加固,地基承载力特征值提高显著,节省了造价,并积累了施工经验。     

浅析自动化控制标准化的意义

标准化是科学管理的重要组成部分,标准化设计不仅提高了工作效率还推动了技术创新和科技的进步。论文通过介绍自控系统标准化的优点,并以天然气压缩机控制系统举例,论述了自动化控制标准化在实际使用中的意义。