An algorithm for finding reasonable paths in transit networks

In this paper, reasonable paths in transit networks are defined as possible paths that satisfy the acceptable time criterion and transfer‐walk criterion. A recursive algorithm for finding all of the reasonable paths in a transit network that does not involve a rapid increase in program run‐time with network size is presented. Realistic transit networks in Hong Kong and Guangzhou were selected as case studies of the different phases of the development of a trip planning system. Transport planning practitioners and potential users were invited to test the system to evaluate its performance. The results of the prototype evaluation were satisfactory, and the viability of the system as a useful tool for supporting decision‐making has been confirmed by the positive feedback that was obtained from survey questionnaires.     

汽车遮阳板的设计

安全性和整体性是汽车遮阳板设计的主要原则。根据整车的定位选择遮阳板的规格样式和基本结构形式。然后在人机工程学的基础上，综合考虑顶盖前横梁、顶莲和内视镜等的制约因素，进行空间布置和遮阳板外形轮廓的检查。最后参考同类车型完成具体的结构设计。     

新型水下储油技术

针对南海百米左右水深边际油田的开发，提出了一种新型的适用于可移动生产储油平台的水下储油方式。介绍了方案的基本配置、工作流程及维温方式。通过设置不同功能的舱室和布置监测仪器，保留了油水置换低投资的主要优点，避免了环境污染。各种设备位于水面以上，维护方便。基本解决了制约工程应用的技术问题。     

浅论台背跳车的危害及对策

台背跳车对于行车舒适性产生较大影响,同时危害了桥涵通道的使用寿命.本文以公路施工中的实践经验,介绍了台背跳车的处理方法,为克服公路工程建设中台背跳车这一通病提供了有益的预防措施.     

施工企业工程造价控制

主要从成本费用预测和成本费用控制两方面着手，对施工企业工程造价的控制进行论述。成本费用预测常用的方法为定性预测和定量预测。通过利用原有资料和依靠专业人员的经验，对成本费用进行定性预测；利用数学模型，对成本费用进行定量预测。成本费用控制常用的方法为PDCA管理循环法、价值工程法。此文通过工程实例，采用价值工程法，论述成本费用的控制。     

浅议频率法测定斜拉桥的索力

该文介绍了频率法测量斜拉桥索力的测试原理,结合实例,给出某斜拉桥的部分测量结果,并就如何进一步提高索力测量精度进行了探讨。测量表明,用频率法测定索力,结果可靠,简便实用。     

基于ANSYS的瞬变电磁法数值模拟

在隧道中进行瞬变电磁法探测时,二次感应场还受到掌子面后方围岩的影响,使得隧道全空间瞬变电磁场正、反演比大地半空间更困难。论文利用有限元分析软件ANSYS对在隧道中进行瞬变电磁超前地质预报时瞬变电磁场进行了数值模拟计算,并将计算结果与物理模拟结果进行比较,表明了利用该法在隧道中进行瞬变电磁超前地质预报正演计算的可行性。     

Multi-try counter-meshing gears discrimination device based on MEMS technology

A multi-try counter-meshing gears (CMG) discrimination device based on micro electromechani-cal system (MEMS) technology was designed for some specified information fields. The discrimination deviceconsists of two groups of metal CMG, two pawl/ratchet mechanisms, two driving micromotors and two re-setting micromotors, which make the CMG withdraw by raising the pawls. The energy-coupling element isa photoelectric sensor with a circular plate which is notched. Micromotor is fabricated using the ultravioletLiGA (UV-LiGA) fabrication process and precision mechanical engineering. The discrimination device has thefunction which can automatically reset, with the correct resetting code, it can be tried another times.     

湿陷性黄土的电热丝热加固法探讨

湿陷性黄土热加固法有着悠久的历史,但在实际工程上应用困难,阻碍了其广泛的应用。将电热丝的发热效应运用到湿陷性黄土的热加固法中,以改进原始热加固法的加固深度不够、加固形状不理想、热效率差和安全性差等不足,从而达到更经济、精准、安全、实用的目的。     

Reliability analysis of repairable systems using stochastic point processes

In order to analyze the failure data from repairable systems, the homogeneous Poisson process(HPP) is usually used. In general, HPP cannot be applied to analyze the entire life cycle of a complex, re-pairable system because the rate of occurrence of failures (ROCOF) of the system changes over time rather thanremains stable. However, from a practical point of view, it is always preferred to apply the simplest methodto address problems and to obtain useful practical results. Therefore, we attempted to use the HPP model toanalyze the failure data from real repairable systems. A graphic method and the Laplace test were also usedin the analysis. Results of numerical applications show that the HPP model may be a useful tool for the entirelife cycle of repairable systems.