Over the recent decades,tremendous research efforts have been devoted to direct methanol fuel cell(DMFC)and microbial fuel cell(MFC).Yet,the cathodic electr
Animal sonar performance is quite better than man-made sonar system,especially in complex environment.The harmonic structure sound used by big brown bat in
Accidental falls can cause physical injuries,fractures and other health complications,especially for elderly people living alone.Delay or lack of timely ass