Niu Xiao-Dong, Lu Li-Rong, Wang Jian, Han Xing-Cheng, Guo Shu-Yan, Wang Li-Ming. Electrocardiogram signal reconstruction based on mode component identification by heartbeat physical feature in improved empirical mode decomposition domainJ. Acta Physica Sinica, 2021, 70(3): 038702. DOI: 10.7498/aps.70.20201122