边坡岩体结构面抗剪强度参数确定方法探讨

在中小岩质边坡稳定性分析中,常常根据技术规范提供的实用分类方法和工程经验相结合估算结构面抗剪强度参数.GB 50330—2002《建筑边坡工程技术规范》是一种广为应用的实用分类方法,可为边坡岩体结构面提供抗剪强度参数.随着结构面试验研究的深入和该国标的广泛应用,有必要进一步补充与完善这一实用分类方法.为此,在广泛的调研、有针对性的现场试验和室内试验的基础上,对该分类方法提出了修正意见,使其更具科学性与实用性,更好的指导岩质边坡设计.     

基于广义3S的公路安全评价数据采集方法探讨

本文以当前测绘行业比较热门的广义3S技术为基础,针对公路运营安全这一热点问题展开研究。内容涉及基于广义3S技术交通运营安全空间数据库的建立、基于广义3S技术的动态信息获取技术以及基于广义3S技术的动态交通运营安全后评价体系的建立等创新研究工作。     

基于ActiveX技术的联锁表自动生成软件

对联锁表设计的现状和发展方向进行了分析，介绍了基于ActiveX技术的联锁表自动生成软件的功能特点、主要功能模块、关键算法及其在实践中的应用。     

A discrete optimization approach for locating Automatic Vehicle Identification readers for the provision of roadway travel times

This paper develops an algorithm for optimally locating Automatic Vehicle Identification tag readers by maximizing the benefit that would accrue from measuring travel times on a transportation network. The problem is formulated as a quadratic 0–1 optimization problem where the objective function parameters represent benefit factors that capture the relevance of measuring travel times as reflected by the demand and travel time variability along specified trips. An optimization approach based on the Reformulation–Linearization Technique coupled with semidefinite programming concepts is designed to solve the formulated reader location problem. To illustrate the proposed methodology, we consider a transportation network that is comprised of freeway segments that might include merge, diverge, weaving, and bottleneck sections. In order to derive benefit factors for the various origin–destination pairs on this network, we employ a simulation package (INTEGRATION) in combination with a composite function, which estimates the travel time variability along a trip that is comprised of links that include any of the four identified sections. The simulation results are actually recorded as generic look-up tables that can be used for any such section for the purpose of computing the associated benefit factor coefficients. Computational results are presented using data pertaining to a freeway section in San Antonio, Texas, as well as synthetic test cases, to demonstrate the effectiveness of the proposed approach, and to study the sensitivity of the quality of the solution to variations in the number of available readers.     

测井仪技术的发展趋势

本文简单介绍了石油测井仪器的发展情况,阐述了我国石油测井技术的发展情况,并对其发展趋势作了探讨。     

船舶尾楼海损后复建的电气工程

2009年我厂承接了一艘海损船，该船的主要工程为尾楼新造及其内部设备全部按原图恢复。本文阐述上层建筑尾楼复建的电气工程，以供单一的修船厂参考。     

钢管拱肋加工制作工艺

文章结合银川绕城高速公路大西湖特大桥工程实例，从钢管拱肋管节划分方法、制作加工精度要求、拱肋加工工艺流程、制作方法等方面介绍了钢管拱肋的加工制作工艺，并提出了工艺制作中的注意事项。     

谈减轻我国汽车发动机排气污染的实用技术

从我国的汽车保有状况、道路状况、汽车产品质量状况等方面，谈了治理汽车排气污染的迫切性。分别分析了汽油机、柴油机的排气污染物生成机理，分别从几个方面阐述减轻车用汽油机、柴油机排气污染的实用技术。     

汽车缸套网状多孔性镀铬修复工艺

在汽车修理中，采用缸套网状镀铬的修复方法，是提高发动机使用寿命节约燃料和减少润滑油消耗的有效方法之一。介绍了网状镀铬层的形成机理，镀铬的工艺过程，工艺规范和设备，以及易产生的问题及处理方法。     

船舶柴油机监测与故障诊断技术现状及发展趋势

本文介绍了国内外船舶柴油机监测与故障诊断技术的现状、技术难点及应用,重点介绍了振动和热力参数诊断法及其发展趋势