EEM: evolutionary ensembles model for activity recognition in Smart Homes

Authors:
Muhammad Fahim;Iram Fatima;Sungyoung Lee;Young-Koo Lee
Affiliations:
Ubiquitous Computing Lab, Department of Computer Engineering, Kyung Hee University, Yongin-si, Korea 446-701;Ubiquitous Computing Lab, Department of Computer Engineering, Kyung Hee University, Yongin-si, Korea 446-701;Ubiquitous Computing Lab, Department of Computer Engineering, Kyung Hee University, Yongin-si, Korea 446-701;Ubiquitous Computing Lab, Department of Computer Engineering, Kyung Hee University, Yongin-si, Korea 446-701
Venue:
Applied Intelligence
Year:
2013

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Abstract

Activity recognition requires further research to enable a multitude of human-centric applications in the smart home environment. Currently, the major challenges in activity recognition include the domination of major activities over minor activities, their non-deterministic nature and the lack of availability of human-understandable output. In this paper, we introduce a novel Evolutionary Ensembles Model (EEM) that values both minor and major activities by processing each of them independently. It is based on a Genetic Algorithm (GA) to handle the non-deterministic nature of activities. Our evolutionary ensemble learner generates a human-understandable rule profile to ensure a certain level of confidence for performed activities. To evaluate the EEM, we performed experiments on three different real world datasets. Our experiments show significant improvement of 0.6 % to 0.28 % in the F-measures of recognized activities compared to existing counterparts. It is expected that EEM would be a practical solution for the activity recognition problem due to its understandable output and improved accuracy.