Energy Efficiency Evaluation of Ethylene Product System Based on Density Clustering Data Envelopment Analysis Model

2012 ◽  
Vol 9 (1) ◽  
pp. 735-741 ◽  
Author(s):  
Zhi-Qiang Geng ◽  
Yong-Ming Han ◽  
Chen-Ping Yu
2014 ◽  
Vol 61 ◽  
pp. 904-909 ◽  
Author(s):  
Chenxi Song ◽  
Mingjia Li ◽  
Fan Zhang ◽  
Yaling He ◽  
Wenquan Tao

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