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Title: Cross-position activity recognition with stratified transfer learning
Authors: Chen, Yiqiang
Wang, Jindong
Huang, Meiyu
Yu, Han
Keywords: Engineering::Computer science and engineering
Issue Date: 2019
Source: Chen, Y., Wang, J., Huang, M., & Yu, H. (2019). Cross-position activity recognition with stratified transfer learning. Pervasive and Mobile Computing, 57, 1-13. doi:10.1016/j.pmcj.2019.04.004
Journal: Pervasive and Mobile Computing
Abstract: Human activity recognition (HAR) aims to recognize the activities of daily living by utilizing the sensors attached to different body parts. HAR relies on the machine learning models trained using sufficient activity data. However, when the labels from a certain body position (i.e. target domain) are missing, how to leverage the data from other positions (i.e. source domain) to help recognize the activities of this position? This problem can be divided into two steps. Firstly, when there are several source domains available, it is often difficult to select the most similar source domain to the target domain. Secondly, with the selected source domain, we need to perform accurate knowledge transfer between domains in order to recognize the activities on the target domain. Existing methods only learn the global distance between domains while ignoring the local property. In this paper, we propose a Stratified Transfer Learning (STL) framework to perform both source domain selection and activity transfer. STL is based on our proposed Stratified distance to capture the local property of domains. STL consists of two components: 1) Stratified Domain Selection (STL-SDS), which can select the most similar source domain to the target domain; and 2) Stratified Activity Transfer (STL-SAT), which is able to perform accurate knowledge transfer. Extensive experiments on three public activity recognition datasets demonstrate the superiority of STL.
ISSN: 1574-1192
DOI: 10.1016/j.pmcj.2019.04.004
Rights: © 2019 Elsevier B.V. All rights reserved. This paper was published in Pervasive and Mobile Computing and is made available with permission of Elsevier B.V.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SCSE Journal Articles

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