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中文摘要：
从经济影响角度着手，运用主成分分析、相关性分析、综合评价等方法，分别构建主成分、基于阿尔蒙法的滞后分布、区域经济引力、断裂点范围等模型，研究上海在长三角经济圈的影响力．研究得出：上海在长三角区域经济发展中处于领导地位，且与经济圈内的城市发展联系密切；距上海越远的城市发展速度越低，上海的经济发展在整个经济圈内具有辐射引力作用．
英文摘要：
Aiming at the influence of Shanghai in the Yangtze River Delta economic circle, from the perspective of economic effect, the principal component analysis, correlation analysis and comprehensive evaluation methods were used to establish the models of principal components, respectively based on almon method lag distribution and regional economic gravity. Results show that the Shanghai economy in the long triangle field is in a leadership position,and has a close relationship with the urban development in the economic circle;the farther to Shanghai, the slower the urban develops, which suggests that the economic development of Shanghai with radiation gravity within the entire economic circle.
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