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Symmetry 2017, 9(10), 212;

A Novel Approach Based on Time Cluster for Activity Recognition of Daily Living in Smart Homes

School of Information Science & Technology, Dalian Maritime University, Dalian 116026, China
Key Laboratory of Symbolic Computation and Knowledge Engineering of Ministry of Education, Jilin University, Changchun 130012, China
Artificial Intelligence Key Laboratory of Sichuan Province, Sichuan University of Science and Engineering, Zigong 643000, China
School of Computer and Software, Nanjing University of Information Science & Technology, Nanjing 210044, China
Author to whom correspondence should be addressed.
Received: 23 May 2017 / Revised: 13 September 2017 / Accepted: 14 September 2017 / Published: 1 October 2017
(This article belongs to the Special Issue Applications of Internet of Things)
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With the trend of the increasing ageing population, more elderly people often encounter some problems in their daily lives. To enable these people to have more carefree lives, smart homes are designed to assist elderly people by recognizing their daily activities. Although different models and algorithms that use temporal and spatial features for activity recognition have been proposed, the rigid representations of these features damage the accuracy of activity recognition. In this paper, a two-stage approach is proposed to recognize the activities of a single resident. Firstly, in terms of temporal features, the approximate duration, start and end time are extracted from the activity records. Secondly, a set of activity records is clustered according to the records’ temporal features. Then, the classifiers are used to recognize the daily activities in each cluster according to the spatial features. Finally, two experiments are done to validate the recognition of daily activities in order to compare the proposed approach with a one-dimensional model. The results demonstrate that the proposed approach favorably outperforms the one-dimensional model. Two public datasets are used to evaluate the proposed approach. The experiment results show that the proposed approach achieves average accuracies of 80% and 89%, respectively. View Full-Text
Keywords: smart homes; activity recognition; sensors smart homes; activity recognition; sensors

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Liu, Y.; Ouyang, D.; Liu, Y.; Chen, R. A Novel Approach Based on Time Cluster for Activity Recognition of Daily Living in Smart Homes. Symmetry 2017, 9, 212.

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