Abstract: The indices that reflected the current situations of the urban ecosystem of Dalian were established in the paper. On the basis of calculating the weight of each index by the analytical hierarchy process(AHP), the current situation of the urban ecosystem of Dalian was assessed in terms of individual and comprehensive indices by the method of comparative assessment. The results of the assessed values of the composite indices showed that the social situation, economic situation, environmental situation and holistic situation of Dalian were in turn the eighth, the fourth, the fourteenth and the fifth among twenty cities along the coast of China respectively.

Key words: DNDC model, sensitive factors analysis;, uncertainty analysis, model application.