JOURNAL OF NATURAL RESOURCES ›› 2009, Vol. 24 ›› Issue (11): 1994-2004.doi: 10.11849/zrzyxb.2009.11.014

• Resources Evaluation • Previous Articles     Next Articles

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-wang1,WANG Shu-tao1,MEN Ming-xin1,QI Yue-pu1,2,XU Hao1   

  • Online:2009-11-27 Published:2009-11-27