PRINCIPAL COMPONENT ANALYSIS AND LOCAL CORRELA-TION TRACKING AS TOOLS FOR REVEALING AND ANALYZING SEISMO-ELECTROMAGNETIC SIGNAL OF EARTHQAUKE
LI Jian-kai, TANG Ji
SEISMOLOGY AND GEOLOGY . 2017, (3): 517 -535 .  DOI: 10.3969/j.issn.0253-4967.2017.03.006