Multi scale evaluation and analysis of international trade objectives of port cities.

The analysis of the multi-scale evaluation of port city's international trade goal is conducive to the sustainable development of port city's international trade. In order to make a more in-depth study on the realization ability of port city's international trade sustainable development goal, this paper proposes a new multi-scale evaluation method of port city's international trade goal. This method selects the evaluation indexes, uses the improved normalization method to process the indexes, uses the combination of AHP and factor analysis method to form the subjective and objective combination weighting method, brings the processed indexes into the least square optimization combination evaluation model, calculates the index weight, and uses the fuzzy evaluation method to carry out multi-scale index evaluation on the international trade of port cities to realize its multi-scale evaluation and analysis. The results show that the standardized index of Shanghai's foreign trade dependence is 0.0056, indicating its independence in international trade. In the comprehensive evaluation, the evaluation values of Shanghai, Tianjin, and Guangzhou are 92.56, 87.89, and 88.45, respectively, which are very close to the actual results, which shows that the accuracy of the evaluation method is high, and provides a theoretical basis for the sustainable development of international trade in port cities. [ABSTRACT FROM AUTHOR]