||Recognizing activities of daily living is mainly used in medical care, record and track patients' daily living. It can substantially reduce burden of human resource. And recognizing daily living activity has become the key point of Smart home. However, compared with medical care, Smart home requires more privacy. Therefore, the main problem is how to improve accuracy without equipping with any invasive sensor.|
Using Knowledge-driven approach have been conducted well, but Knowledge-driven relies on subjective restrictions. And each individual resident has their own living style, subjective restrictions probably has reached the limitations and needs a lot of work to do in advance. Therefore, our research employees an approach that based on objective method to recognize human's daily activity.
The research data was collected form WSU CASAS. Previous researches took advantage of camera or body-worn sensors to make rules of restriction, but we figure that body-worn sensor involve more privacy and convenience issue. Therefore, we only used data collected from non-invasive sensor. The coding method we designed features the time sequence in each individual datum, which allows us to randomly draw training data from the whole population. And it will solve the problem that the frequency of occurrence of activities vary from time to time.
Our research employed three models, which are random forest, support vector machine and sequence to sequence model. We expect that machine learning won't require prior knowledge to have a better balance prediction result among all activities and have ability to predict new combination of activities, so do the accuracy, the precision, the recall and the F1-measure.