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The urban ecosystem is a complex system hat are compounded of environment –economic-social ,the factors of urban ecosystem affect the decision of the floating population to chose city .In this paper ,we according to the urban ecosystem to design the questionnaire ,and study the weights of the factors that influence the decision by AHP ,and find that economy(More)
A catastrophe progress method based on catastrophe theory is proposed in this paper for assessment of ecosystem health of China rural areas. A set of indicators fitting for China rural areas condition are selected to establish the model and the final results show that from 1985 to 2005 the ecosystem as a whole shows an increasing trend, and the society and(More)
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