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	ST-MVL: Filling Missing Values in Geo-sensory Time Series Data
	Xiuwen Yi; Yu Zheng; Junbo Zhang; Tianrui Li
	2016
会议名称	IJCAI 2016
会议地点	New York
英文摘要	Many sensors have been deployed in the physical world, generating massive geo-tagged time series data. In reality, we usually lose readings of sensors at some unexpected moments because of sensor or communication errors. Those missing readings do not only affect real-time monitoring but also compromise the performance of further data analysis. In this paper, we propose a spatio-temporal multi-view-based learning (ST-MVL) method to collectively fill missing readings in a collection of geo-sensory time series data, considering 1) the temporal correlation between readings at different timestamps in the same series and 2) the spatial correlation between different time series. Our method combines empirical statistic models, consisting of Inverse Distance Weighting and Simple Exponential Smoothing, with data-driven algorithms, comprised of User-based and Item-based Collaborative Filtering. The former models handle the general missing cases based on empirical assumptions derived from history data over a long period, standing for two global views from a spatial and temporal perspective respectively. The latter algorithms deal with special cases where empirical assumptions may not hold, based on recent contexts of data, denoting two local views from a spatial and temporal perspective respectively. The predictions of the four views are aggregated to a final value in a multi-view learning algorithm. We evaluate our method based on Beijing air quality and meteorological data, finding our model's advantages beyond ten baseline approaches.
收录类别	EI
语种	英语
内容类型	会议论文
源URL	[http://ir.siat.ac.cn:8080/handle/172644/10316]
专题	深圳先进技术研究院_数字所
作者单位	2016
推荐引用方式 GB/T 7714	Xiuwen Yi,Yu Zheng,Junbo Zhang,et al. ST-MVL: Filling Missing Values in Geo-sensory Time Series Data[C]. 见:IJCAI 2016. New York.

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