Junrui Liang received a Ph.D. degree in mechanical and automation engineering from The Chinese University Hong Kong, Hong Kong, China, in 2010. He is currently an Associate Professor at the School of Information Science and Technology, ShanghaiTech University, Shanghai. His research interests include energy conversion and power conditioning circuits, kinetic energy harvesting and vibration suppression, the Internet of Things (IoT) devices, and mechatronics.