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Analysis of travel activity determinants using robust statistics

机译:使用稳健统计数据分析旅行活动决定因素

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摘要

This study investigates travel behavior determinants based on a multiday travel survey conducted in the region of Ghent, Belgium. Due to the limited data reliability of the data sample and the influence of outliers exerted on classical principal component analysis, robust principal component analysis (ROBPCA) is employed in order to reveal the explanatory variables responsible for most of the variability. Interpretation of the results is eased by utilizing ROSPCA. The application of ROSPCA reveals six distinct principal components where each is determined by a few variables. Among others, our results suggest a key role of variable categories such as journey purpose-related impedance and journey inherent constraints. Surprisingly, the variables associated with journey timing turn out to be less important. Finally, our findings reveal the critical role of outliers in travel behavior analysis. This suggests that a systematic understanding of how outliers contribute to observed mobility behavior patterns, as derived from travel surveys, is needed. In this regard, the proposed methods serve for processing raw data typically used in activity-based modelling.
机译:这项研究基于在比利时根特地区进行的多日旅行调查,调查了旅行行为的决定因素。由于数据样本的数据可靠性有限以及离群值对经典主成分分析的影响,因此采用鲁棒主成分分析(ROBPCA)来揭示造成大多数可变性的解释变量。利用ROSPCA可以简化结果的解释。 ROSPCA的应用揭示了六个不同的主要组成部分,每个组成部分都由几个变量确定。除其他外,我们的结果表明,可变类别的关键作用,例如与旅程目的相关的阻抗和旅程固有约束。出乎意料的是,与旅程时间相关的变量变得不那么重要了。最后,我们的发现揭示了异常值在旅行行为分析中的关键作用。这表明需要对旅行调查得出的异常值如何影响观察到的流动性行为模式进行系统的了解。在这方面,提出的方法用于处理通常在基于活动的建模中使用的原始数据。

著录项

  • 来源
    《Transportation》 |2016年第6期|979-996|共18页
  • 作者单位

    Katholieke Univ Leuven, CIB, Mob Leuven Mobil Res Ctr L, Celestijnenlaan 300A,POB 2422, B-3001 Leuven, Belgium;

    Katholieke Univ Leuven, Dept Math, Celestijnenlaan 200B,POB 2400, B-3001 Leuven, Belgium;

    Katholieke Univ Leuven, CIB, Mob Leuven Mobil Res Ctr L, Celestijnenlaan 300A,POB 2422, B-3001 Leuven, Belgium;

    Katholieke Univ Leuven, Dept Math, Celestijnenlaan 200B,POB 2400, B-3001 Leuven, Belgium;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Travel behavior; Determinants; Outliers; Robust sparse principal component analysis;

    机译:旅行行为;决定因素;离群值;鲁棒稀疏主成分分析;

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