FACTS在电力系统中的应用

柔性交流输电系统（FACTS）是近年来出现的一项新技术,本文对柔性交流输电技术的概念及发展现状进行了简要介绍,详细论述了 FACTS 中几种主要控制器的结构原理及应用。最后总结了 FACTS 控制器在电力系统潮流控制、系统振荡、稳定性运行中的重要作用以及FACTS的发展前景。     

基于PLC的船用气动蝶阀遥控装置设计

文章设计了一种基于西门子S7-200的气动蝶阀遥控装置,具有遥控启动、关闭各个船舶区位气动蝶阀的功能,并具备了故障报警、断线报警功能。给出了硬件组态及软件设计流程,测试结果显示系统具有高可靠性和实用性。     

MEC-X1型控制器在舰船用机电设备中的应用

MEC-X1型控制器是一款能够满足舰船用环境和电磁兼容性要求,具有事件记录功能的系列化、通用化、组合化的嵌入式舰船用机电设备控制器。它解决了一般工业级控制器不能满足舰船用环境,没有数据记录功能等一系列问题,并在几型舰船用设备上得到了良好的应用。     

PLC软件的开发管理

针对当前船舶设备PLC程序普遍存在的技术运用不规范现象,本文通过借鉴计算机软件开发的相关标准要求,探讨了规范PLC软件开发过程的工作流程,提出了PLC 软件全生存期质量保证的具体措施。     

嵌入式PLC高速脉冲输出的研究与实现

本文介绍了基于C8051F020单片机的嵌入式PLC的高速脉冲输出功能的开发。灵活运用C8051F020内部提供的可编程计数器阵列(PCA)模块实现了PLC高速脉冲输出功能。     

港口铁路复线交叉路口的智能控制

本文介绍了以欧姆龙公司生产的CPM2AH型PLC为中心控制器用于港口吊车作业现场铁路交叉复线道口的智能控制系统,给出了具体的设计思想、系统的硬件配置和相应的软件框图。该系统在实际应用中获得了良好的效果。     

High accuracy crash mapping using fuzzy logic

Accurate crash location data in crash databases can be shown to be essential for crash modelling, crash mapping, hazardous road segment identification and other studies that aim to decrease the number of crashes within a network area. In this paper a generic and high-accuracy automatic crash mapping method is developed and presented. The methodology is based on a transformed map-matching method for candidate road segment identification and on a fuzzy logic inference system for the final road segment selection. The method is implemented by employing all injury and fatal crashes that occurred during 2012 in the UK Strategic Road Network but can be transferred to other network/crash data. The accuracy of the developed method is estimated to be 98.9% (±1.1%) correct matches. The results of this method are compared to other less advanced crash mapping methods.     

Development of location-based services for recommending departure stations to park and ride users

More and more commuters are beginning to favour public transportation. Fast and convenient park and ride (PnR) services provided by public transportation authorities are the result of changes of household demographics and household, increasing fuel prices and a focus on environmental sustainability. However, lack of parking spaces in PnR facilities creates a major bottleneck to this service. The aim of this research is to develop a location-based service (LBS) application to help PnR users choose the best train station to use to reach their destination using a multicriteria decision making model. A fuzzy logic method is used to estimate parking availability when a user is estimated to arrive at a PnR facility. Two surveys are conducted to collect traffic flow, travel behaviour and service quality data at four selected Perth Western Australia train stations. With the proposed approach and survey data, a prototype of LBS application, Station Finder, was developed using the Android SDK 4.0 and Google API 16. This application is a useful and practical tool to save travel cost and time of PnR users’.     

Rapid transit system simulation with interactive graphics display

A mathematical model of a rapid transit system has been developed. The model employs computer techniques to simulate the physical system. To further enhance the results and gain management confidence in the reliability and validity of the design of the model, a TV‐like display of the computer results enables the viewer to “see” the performance of the model as it happens. The results displayed thus include: The track layout, time (simulation), train position on the track, and the number of passengers riding on each train and waiting at each platform or station. The computer printout of results is limited to summary type data, relying on the display for detailed evaluation and analysis.     

Patterns of urbanization and energy requirements: recent regulation changes and simulation studies concerning American urban areas

In recent years, the world economy has become more integrated internationally and container transportation has become increasingly more important as the proportion of all trade using containers is continuously growing. In order to adapt to the increasing containerization trend, it is essential to plan and construct adequate ports and facilities to cope with this development.

Based on the analysis of factors influencing container movements, this paper illustrates the logical relationships for a distribution model, which has been used to predict the distribution of containers among the three main Seaports near Shenzhen and Hong Kong. A fuzzy number‐based distribution model is outlined in the paper. The paper illustrates the main influencing factors and their logical relationships and proposes a primary distribution model where the attractiveness of each port has been calibrated. The results show that the Port of Hong Kong is significantly more attractive than the other two ports modelled and is likely to continue to be so in the future.