排序方式: 共有30条查询结果,搜索用时 15 毫秒
11.
12.
Sharon Cullinane 《运输评论》2013,33(1):21-34
Hong Kong currently has low levels of car ownership and use due to a combination of good public transport, high population densities and high private transport costs. However, levels are rising, contributing to congestion and environmental problems. A major response by the government is to seek to increase rail's share of public transport journeys from its current level of 33% to 45% by 2016. After reviewing the transport situation in Hong Kong, the paper discusses the appropriateness of these targets as well as questioning whether they are achievable. The results of a questionnaire survey of 595 residents of Hong Kong, designed to elicit people's attitudes to cars and public transport, are analysed. It is concluded that unless the government does more to curb car ownership and use, rail targets will have little chance of being achieved. 相似文献
13.
14.
海量动态交通流中,经常出现结伴而行的车辆.特定区域内,当结伴车辆出现的概率较大时,即可将其视为伴随车辆,这类车辆具有相互掩护和团伙作案的重大嫌疑.及早检测和识别伴随车辆,能有效降低道路交通安全系统中的危险因素,对预防和减少与道路有关的治安和刑事案件,也具有十分重要的意义.本文在车牌自动识别数据库基础上,应用数据挖掘技术,提出伴随车辆检测和识别算法,并进行了实地测试.实验结果表明:应用数据挖掘技术对伴随车辆进行分析检测,具有检测效率高、检测误差小、应用范围广的特点,完全可以满足刑侦等部门对伴随嫌疑车辆进一步排查的需要. 相似文献
15.
16.
集肤效应伴热技术在辽河油田的应用 总被引:3,自引:0,他引:3
针对辽河油田油稠、高凝油面积大、凝固点高,在集输过程中易凝、输送困难的特点,在集输过程中采用了集肤效应伴热的方法。集肤效应是一种新型的输液管伴热技术,伴热结构合理、热能利用率高、伴热温度可控、使用寿命长,是管道安全运行的最好措施。介绍了集肤效应国内外的应用情况,着重介绍了集肤效应的基本原理和在实际应用中的经济性对比,集肤效应发热部分和电源部分的基本结构,集肤效应伴热技术在辽河油田中的使用情况。 相似文献
17.
18.
19.
20.