Economic benefits of land use in Feidong,Wenji,Dashu and Wuzhuang service stations at Hefei-Nanjing Expressway were analyzed from total output value of unit lan
According to the relevant statistical data in National Agricultural cost-benefit Data Compilation(2001- 2013),we use the modified entropy weight- TOPSIS model t
Based on the data related to the Chinese and world agricultural production and trade from 1986 to 2011,this paper uses the principal component analysis,cointegr