架空索道设计系统

根据行业标准,满足林业架空索道设计规范进行单跨或多跨驾空索道设计计算,对索道侧型进行验算和绘制,能检验木捆最低点是否与地面疑点相碰,能确定方式方法;根据不同索道索系,对工作索进行计算,并为选择绞盘机提供决策。以此建立我国单跨或多跨架空索道设计的数学模型,并编制了高级BASIC程序。使用本系统功效高,操作简便,运算速度快,计算精确,通用性好。     

浅谈九华山索道线路设备的更新和改造

章通过对国产单线脉动循环车组式索道线路设备的更新和改造,分析了国产同类索道在设计、制造、安装中存在的技术问题及其改进方向,总结了经验,可供有关设计制造、安装单位和其它类似型式的索道参考。     

介绍我国台湾地区香屯货运索道

本简要介绍了台湾地区香屯水泥公司采石场运输方案的技术经济比较,叙述受到用户青睐的货运索道的线路选择设计以及站内自动化作业概况。章还侧重推荐了香屯索道的超常技术性能、站房工艺配置和主要设备的改进,以及保证抱索器与牵引索挂接时达到速度同步的特殊措施。这些对于振兴国内货运索道事业具有重要参考意义。     

对黄石寨引进索道设备技术先进性的粗浅认识

文章简略地介绍了黄石寨客运索道公司从法国波马公司引进的双线往复车厢组式索道成套设备和技术的先进性，特别着重介绍了该型索道在电气控制方面的独到之处，可供有关设计和营运人员参考。     

循环式索道线路支架的疲劳问题

索道的线路支架是索道重要的受力构件,在长期的承重载荷和交变应力作用下,会发生变形或断裂,严重威胁索道的安全运行。本分析了支架产生疲劳的各种原因,并提出了减缓支架产生疲劳破坏的安全技术措施。     

双线循环脉动式客运索道

本简要地介绍了国外第一条新型双线循环脉动客运索道问世概况及其主要技术性能。叙述该型索道的结构特点与关键技术。章最后预测了新型索道的应用前景，并论述了当前设计存在的问题。     

无线测风仪在索道线路中的应用

风是影响索道安全运行的一大因素。本文介绍了一种结构简单而适用的无线测风仪在索道线路上应用的效果。     

客运架空索道的线路与支架设计

本对客运架空索道的线路、承载索、牵引索、平衡索和运载索的选择计算、支架配置及其刚度和强度的验算等有关问题谈点看法，供设计人员参考。     

人机工程学与索道安全设计

索道者，以索为道也。尤其是架空索道，其安全性尤为重要。有人比喻一条架空客运索道就是一架低空飞行的“波音”客机。这是一点也不夸张的。现代客索运道运行速度越来越快，载客人数越来越多，线路越来越长，自动化程度越来越高，技术越来越复杂。怎样才能使现代索道更安全、更舒适?     

关山初度路犹长——记我国索道工程设计专家朱俊国和他的战斗集体

章记述了我国索道工程设计专家朱俊国和以他为首的昆明有色冶金设计研究院索道设计组为开拓我国的架空索道事业不懈奋斗的光辉业绩。     

盆周山区高速公路交通运行特点分析

本文界定了盆周山区高速公路的范围,并介绍了其发展历程.通过对典型盆周山区高速公路的实地调研、驾驶人问卷调查和运行数据收集,用数理统计方法分析了盆周山区高速公路的交通流、驾驶人、交通事故、运营管理等交通运行特点,并提出了有针对性的运营管理建议.     

The Maintenance of The London Underground Tube Tunnel Network

It is helpful to have a brief history of London Underground when considering any aspect of its maintenance or future development. The system has developed over more than 100 years and only comparatively recently come under the control of a single organisation. This partly explains the complexity that has resulted from differences in construction between lines. A brief History is accordingly appended to this presentation as Appendix B. The recent History outlines how Tube Lines have come to be involved with London Underground and explains a little of the reason for our existence. We are required to maintain and improve London Underground assets. Our performance has to be measurable and it follows that we need to know the current condition "value" of those assets. A large part of London Underground's infrastructure is tube tunnels some of which have not been fully assessed since they were first constructed in the 19th Century. They used materials whose physical and durability properties were not, at the time, fully understood; and they were designed on a very empirical basis if they were "designed" at all. Some shafts and other elements of the Tunnel Asset appeared to have been forgotten or lost when the Public Private Partnership (PPP) instigation procedures began in earnest in 1998. A major part of our current maintenance programme is thus to ascertain and agree the current condition and extent of approximately 178kilometres of tube tunnel asset that we are required to maintain and improve.     

The Mixed Logit model: The state of practice

The mixed logit model is considered to be the most promising state of the art discrete choice model currently available. Increasingly researchers and practitioners are estimating mixed logit models of various degrees of sophistication with mixtures of revealed preference and stated choice data. It is timely to review progress in model estimation since the learning curve is steep and the unwary are likely to fall into a chasm if not careful. These chasms are very deep indeed given the complexity of the mixed logit model. Although the theory is relatively clear, estimation and data issues are far from clear. Indeed there is a great deal of potential mis-inference consequent on trying to extract increased behavioural realism from data that are often not able to comply with the demands of mixed logit models. Possibly for the first time we now have an estimation method that requires extremely high quality data if the analyst wishes to take advantage of the extended behavioural capabilities of such models. This paper focuses on the new opportunities offered by mixed logit models and some issues to be aware of to avoid misuse of such advanced discrete choice methods by the practitioner.     

The train platforming problem: The infrastructure management company perspective

If railway companies ask for station capacity numbers, their underlying question is in fact one about the platformability of extra trains. Train platformability depends not only on the infrastructure, buffer times, and the desired departure and arrival times of the trains, but also on route durations, which depend on train speeds and lengths, as well as on conflicts between routes at any given time. We consider all these factors in this paper. We assume a current train set and a future one, where the second is based on the expected traffic increase through the station considered. The platforming problem is about assigning a platform to each train, together with suitable in- and out-routes. Route choices lead to different route durations and imply different in-route-begin and out-route-end times. Our module platforms the maximum possible weighted sum of trains in the current and future train set. The resulting number of trains can be seen as the realistic capacity consumption of the schedule. Our goal function allows for current trains to be preferably allocated to their current platforms.Our module is able to deal with real stations and train sets in a few seconds and has been fully integrated by Infrabel, the Belgian Infrastructure Management Company, in their application called Ocapi, which is now used to platform existing and projected train sets and to determine the capacity consumption.     

The dogit model

This paper presents the dogit model. That model is flexible enough to permit the choice among specific pairs of alternatives to be consistent with the independence from irrelevant alternatives axiom, as in a logit model, but it simultaneously allows the choice among other pairs not to be. Dogit parameters add an “income effect” to the “substitution effect” already built into the logit model; alternatively, they allow for the joint presence of compulsive and discretionary elements in consumer behavior, or for the identification of captive markets. Eventual estimation of the values of the parameters of the dogit model appears simpler than for the probit model.