Wang, Wei, Xiaodan Huang, Jijun Zhao, and Yanguang Shen. 2015. “Physiological Signals Based Day-Dependence Analysis With Metric Multidimensional Scaling for Sentiment Classification in Wearable Sensors”. Journal of Engineering and Technological Sciences 47 (1):104-16. https://doi.org/10.5614/j.eng.technol.sci.2015.47.1.8.