浅谈关门海峡的航行方法

根据多次进、出关门海峡的实航经验和体会,对关门海峡的航行特点、航行方法及注意事项进行了详细的综述,这对船长安全通过关门海峡的航行有一定的参考价值和指导意义。     

桥梁加固技术探讨

介绍了桥梁检测和评估的方法，提出了旧桥加固的措施。     

道路不均匀冻胀浅析

分析了道路产生不均匀冻胀的原因,提出了防治道路不均匀冻胀的措施.     

论公路工程的环境保护

着重分析了公路工程开工前期、施工期和营运期各个阶段对沿线自然环境造成的影响，有针对性地提出相应的环保措施．以减少公路工程给自然环境带来的不利影响。     

大体积混凝土裂缝控制措施

大体积混凝土表面易出现纵横裂缝,影响混凝土质量。分析大体积混凝土裂缝产生的原因,介绍防止裂缝发生的一些措施,包括选择合适的水泥、骨料,掺加粉煤灰,掺入外加剂和纤维材料,完善施工工艺,加强温度控制等措施。     

关角特长铁路隧道防排水措施概述

文章分析了关角隧道地下水的赋存条件与分布规律,以及地下水补、径、排特征;详细计算了隧道涌水量,根据洞内、洞外、斜井的不同情况,采取了不同的防排水措施;并对搞好特长隧道施工过程中的防排水提出了建议。     

大窑沟 号隧道特殊地质施工质量控制措施

简要介绍大窑沟Ⅰ号隧道在施工过程中遇到洞口段松散体围岩冒顶、Ⅲ级围岩中水平状围岩掉顶、Ⅴ级围岩坍方等特殊地质施工情况及施工处理措施,确保了隧道施工的安全及质量。     

桥梁混凝土裂缝分析

从混凝土常见裂缝特性、成因着手,论述了各种裂缝的防治措施,并提出简单的裂缝修补方法.以便工程技术人员能够对症下药,尽量避免工程中出现危害较大的裂缝.     

我省高速公路桥面铺装破损的原因及防治措施

通过对辽宁省高速公路桥面铺装破损的研究,找出破损原因,提出有针对性的防治措施,对避免损坏主要受力构件、保证桥梁使用寿命和安全、提高行车质量具有重要意义。     

The use of GIS and relational database management systems to improve the scheduling operations of paratransit

The scheduling operations of many paratransit agencies in the United States are undertaken manually. Those customers who are eligible to travel call in their requests the day before the trip is needed. As the trip requests are received, they are entered into a list of unscheduled trips. In order to schedule these trips, the scheduler must first determine the number of drivers and shuttle buses that are available as well as the time of availability of each. The scheduler must then try to match the rides that are in “similar” areas around the “same” time to place together on the driver's schedule. As new trip requests are made, the schedulers must adjust the trips that are already scheduled to try and schedule as many trips as possible in the most efficient way.

By developing a system that would improve the scheduling system operations of, in this case, DART (Delaware Administration for Regional Transit) First State Paratransit, customers can expect to receive better service that will improve their ability to travel throughout the community. Some devices that could also improve the operations of paratransit agencies are described in this paper, such as satellite‐based Global Positioning System (GPS), radio communication systems, mobile computers, radio frequency‐based data communication systems, internet web pages, automated paratransit information systems, and card‐based data storage and transfer media. However, because paratransit systems are difficult to operate cost‐efficiently, the optimum and most cost‐efficient device must be selected. The system chosen for DART First State Paratransit includes the use of a relational database management system (RDMS) and a transportation Geographic Information System (GIS). RDMS keeps track of the database information as well as the scheduled trips and the GIS is ideal for analyzing both geographic and temporal data. This system is shown to be superior to the manual system.