کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
525152 868893 2013 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Efficient missing data imputing for traffic flow by considering temporal and spatial dependence
موضوعات مرتبط
مهندسی و علوم پایه مهندسی کامپیوتر نرم افزارهای علوم کامپیوتر
پیش نمایش صفحه اول مقاله
Efficient missing data imputing for traffic flow by considering temporal and spatial dependence
چکیده انگلیسی


• We enhance PPCA method by considering multiple sensors’ measurements.
• We show imputing errors can be reduced by using temporal–spatial dependence.
• We suggest a simple yet effective way to embed temporal–spatial dependence.

The missing data problem remains as a difficulty in a diverse variety of transportation applications, e.g. traffic flow prediction and traffic pattern recognition. To solve this problem, numerous algorithms had been proposed in the last decade to impute the missed data. However, few existing studies had fully used the traffic flow information of neighboring detecting points to improve imputing performance. In this paper, probabilistic principle component analysis (PPCA) based imputing method, which had been proven to be one of the most effective imputing methods without using temporal or spatial dependence, is extended to utilize the information of multiple points. We systematically examine the potential benefits of multi-point data fusion and study the possible influence of measurement time lags. Tests indicate that the hidden temporal–spatial dependence is nonlinear and could be better retrieved by kernel probabilistic principle component analysis (KPPCA) based method rather than PPCA method. Comparison proves that imputing errors can be notably reduced, if temporal–spatial dependence has been appropriately considered.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Transportation Research Part C: Emerging Technologies - Volume 34, September 2013, Pages 108–120
نویسندگان
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