Analysis on the fluctuation of grain output in Hebei Province and its causes at multi-time and space of scale based on empirical mode decomposition method
LI Xin-wang, WANG Shu-tao, MEN Ming-xin, QI Yue-pu, XU Hao
JOURNAL OF NATURAL RESOURCES ›› 2009, Vol. 24 ›› Issue (11) : 1994-2004.
Analysis on the fluctuation of grain output in Hebei Province and its causes at multi-time and space of scale based on empirical mode decomposition method
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