EN中文
Analysis on the Fluctuation of Grain Output in China and Its Causes at Multi-time Scale Based on Empirical Mode Decomposition Method
LIU Hui-yu, LIN Zhen-shan, ZHANG Ming-yang
JOURNAL OF NATURAL RESOURCES . 2005, (5): 745 -751 .  DOI: 10.11849/zrzyxb.2005.05.014