利用锚机动力进行锚链换新的工艺

在临时设备不足的紧急情况下,菠萝庙船厂运用锚机自身动力,成功实施了锚链的更新安装。     

地铁车辆段检修库移动式架车机的工艺分析

地铁车辆段检修库中移动式架车机是车体与转向架分解组装以及车底电器、制动等模块拆装的必备设备,移动式架车机以其适用车型广、组合灵活、成本低的特点,得到广泛应用,而移动式架车机要想实现上述功能,需要分析研究与之配套设施的工艺特点。提出移动式架车机在检修库中采用有检查坑和无检查坑的布置方案,通过分析总结后,认为临修库中设置移动式架车机时,采用无检查沟的形式,在架修库设置移动式架车机时,采用有检查坑的形式。     

集装箱码头集卡调度系统

集装箱集卡调度(TPS)系统通过动态实时地调度集卡,将装船、卸船和转堆等一系列需要集卡参与的多条作业路共享所有正在码头作业的集卡,使每辆集卡同时对应多条作业路,保证集卡在卸载后可就近投入其他需要的作业路中,以此缩短集卡的空载行驶时间和距离,实现大船作业边装边卸,在不增加集卡数量的基础上大幅度提高生产效率。     

客车卧具消毒工艺及装置的研究

针对我国铁路旅客列车卧具存在着大量细菌、病毒的现状，进行了深入细致的研究，提出了采用加温、抽真空、投放灭菌气体以及保温、保压等一种全新的消毒工艺，并建立一套完善的消毒装置，可对客车卧具进行全面彻底的消毒、灭菌处理。该技术便于推广使用，具有良好的社会效益和经济效益。     

The implications on willingness to pay of respondents ignoring specific attributes

Individuals processing the information in a stated choice experiment are typically assumed to evaluate each and every attribute offered within and between alternatives, and to choose their most preferred alternative. However, it has always been thought that some attributes are ignored in this process for many reasons, including a coping strategy to handle ones perception of the complexity of the choice task. Nonetheless, analysts typically proceed to estimate discrete choice models as if all attributes have influenced the outcome to some degree. The cognitive processes used to evaluate trade-offs are complex with boundaries often placed on the task to assist the respondent. These boundaries can include prioritising attributes and ignoring specific attributes. In this paper we investigate the implications of bounding the information processing task by attribute elimination through ignoring one or more attributes. Using a sample of car commuters in Sydney we estimate mixed logit models that assume all attributes are candidate contributors, and models that assume certain attributes are ignored, the latter based on supplementary information provided by respondents. We compare the value of travel time savings under the alternative attribute processing regimes. Assuming that all attributes are not ignored and duly processed, leads to estimates of parameters which produce significantly different willingness to pay (WTP) to that obtained when the exclusion rule is invoked.     

关于NP=？ CO—NP的两个问题

本文讨论两个问题:(1)研究了 NP=?NP 与 NP=?CO—NP 之间的关系;(2)证明了 NP=CO—NP<=>(■C■∑*)(C∈NP且C∈NPT)。     

Development of a computer-aided process planning system based on a knowledge base

 Process planning for a hull structure defines the assembly sequence of the hull block. Although this activity is very important because the working strategy defines the production costs, to date it has been done manually. To raise the efficiency of this process, we developed a practical computer-aided process planning system. It has been developed using deliverables obtained from advanced computer integrated manufacturing system (CIM; ACIM) for shipbuilding projects sponsored by the Ship and Ocean Foundation (SOF). The system has a knowledge base which contains the know-how of skilled designers as well as design practices, and allows the assembly sequence of hull parts and intermediate products to be defined automatically. The system has been integrated with the shipyard CAD system MATES, and put to practical use. Received: August 19, 2002 / Accepted: November 25, 2002 Address correspondence to: Y. Sasaki (yuuichi_sasaki@mhi.co.jp) Updated from the Japanese original, which won the 2002 SNAJ prize (J Soc Nav Archit Jpn 2001;189:309–315)     

基于过程分析的工程系统风险分析方法

本文提出的基于过程分析的风险分析方法，能够对工程系统进行全面的描述，并且可以给出系统的风险事件分布。在风险识别阶段使用风险分布图和风险识别表，可使分析人员更容易了解系统的全局和细节，最大限度地避免遗漏风险事件；在风险管理阶段使用风险分布图，将风险事件与作业或生产环节相联系，可以使管理人员和作业人员直观地了解系统中风险存在的位置和形式，更有利于对风险的控制。该方法使风险分析更接近工程实际，更容易为工程技术人员所接受，是风险分析的重要工具之一。     

基于多层复杂网络的物流枢纽城市多尺度分析及发育评价

多层网络(Multilayer Network)是国际研究领域正在兴起的概念,着眼于以不同准则叠加聚合的互补性网络的系统特征和影响力.以全球物流枢纽城市为研究对象,在构建海运、空运、物流企业组织及国际贸易网络的基础上,借助Gephi分析工具,试图从网络结构特性及节点物流运行能力揭示多层物流网络的复杂性特征,实现网络聚合并运用t-SNE与聚类算法,评估城市发育水平并探索其空间分布规律.结果表明：物流网络表现出显著的小世界及无标度特性;呈现以“欧洲西部-亚洲东部及南部-亚洲西部-北美洲东部”为核心的菱形空间结构;其分布具有明显的层级性,不同等级城市分布具有空间异质性.     

高速公路建设项目过程后评价探讨

文章在概述公路建设项目后评价的过程评价基本原理的基础上,针对高速公路建设项目的特点,以沪宁高速公路江苏段为例,从五个方面对高速公路建设项目过程进行了评价分析,并提出相关建议.