TY - Front. Mech. Eng. A1 - Jinhao Qiu, Hao Jiang, Hongli Ji, Kongjun ZHU T1 - Comparison between four piezoelectric energy harvesting circuits Y1 - 2009-06-05 JF - Frontiers of Mechanical Engineering JO - Front. Mech. Eng. SP - 153 EP - 159 VL - 4 IS - 2 UR - https://journal.hep.com.cn/fme N1 - 10.1007/s11465-009-0031-z ER -