基于SD法和灰关联熵的煤炭资源供需预测与分析
徐 超1,赵联振2
Prediction and Analysis on Supply and Demand of Coal Resources Base on SD Method and Gray Related Entropy
XU Chao1, ZHAO Lianzhen2
煤炭经济研究 . 2012, (2): 51 -55 .