| 居民出行OD调查中数据缺失问题及其EM算法研究 |
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| 引用本文： | 何建国,何瑞春.居民出行OD调查中数据缺失问题及其EM算法研究[J].兰州铁道学院学报,2009,28(3):119-122. |
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| 作者姓名： | 何建国 何瑞春 |
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| 作者单位： | 兰州交通大学,交通运输学院,甘肃,兰州,730070 |
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| 摘 要： | 居民出行OD调查数据的缺失,将会给调查数据的后期处理工作带来一定的困难.通过EM算法介绍,讨论如何应用基于样本的EM方法来解决OD调查中的数据缺失问题,并通过具体实例演示其操作过程,验证该方法可为交通预测者科学预测、合理规划提供完整、准确的数据基础.
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| 关 键 词： | EM方法 缺失数据 期望 OD调查 |
Study of EM Algorithm of Resident Trip OD Survey Data Missing Problem |
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| HE Jian-guo,HE Rui-chun.Study of EM Algorithm of Resident Trip OD Survey Data Missing Problem[J].Journal of Lanzhou Railway University,2009,28(3):119-122. |
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| Authors: | HE Jian-guo HE Rui-chun |
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| Institution: | (School of Traffic and Transportation, Lanzhou Jiaotong University, Lanzhou 730070, China) |
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| Abstract: | It will be difficult to deal with the latter part of the survey data processing if the data of resident OD travel survey is lost. In this paper,how to apply the EM method based on a sample to solving the OD survey data missing problem is expounded. Finally, an instance is given to demonstrate the algorithm. The algorithm is able to offer an complete, accurate data basis, and provide a scientific forecast and rational planning for traffic decision makers. |
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| Keywords: | EM method missing data expectation OD survey |
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