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This paper focuses on measuring of the expected locational accessibility (ELA) of urban transit networks for commuters. The ELA of the transit network is measured by a factor named expected locational accessibility index (ELAI), which is calculated based on the expected number of reachable stations with different times of transfers (ENRST) starting from any one transit station on the network. Two approaches, the sample-test-statistics method and the topological analysis method for determining the ENRST are proposed and tested with an example transit network. Finally, the proposed methods are applied to an empirical study for evaluating the ELA performance of bus transit network for commuters of Xiamen City, China. The empirical results show that the ELAI obtained by our two methods are relatively smaller than those obtained by the existing methods. The reason is analyzed to guarantee the accuracy of ELAI measurement. 相似文献
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文章分四个部分对世界地磁模型WMM2010进行介绍。第一部分概述了模型使用者所需掌握的磁场基础知识;第二部分详细介绍了模型所用数据来源和质量控制;第三部分对模型精确性和适用性进行了评估;第四部分给出了WMM2010模型部分磁场分量图以及模型的应用。 相似文献
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伦敦德鲁里(Drewry)航运咨询公司数据显示,全球范围内船舶驾驶员、轮机员及以上高级船员的数量短缺成为航运公司一个巨大挑战.随着马尼拉修正案的实施,世界的船队需要高质量的船员配备.这对于航海类院校来说,既是机遇也是挑战.本文通过RCA分析法对航海英语教育进行分析,以增强学生在世界航运市场上的竞争力. 相似文献
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该文围绕城市规划与建设中存在的有关城市规划与现实需求、城市防洪排水与缺水、城市交通“车多路少”、城市“拆旧”与“建新”、城市基础设施的建设与使用等五个矛盾作了分析,并提出与此相应的对策措施。 相似文献