Study on Radiation Effects of Central Cities in Beijing-Tianjin-Hebei Region

This paper has collected data on eight relevant indicators of cities in the Beijing-Tianjin-Hebei metropolitan area from 2011 to 2016. Starting from the theory of regional economics, using principal component analysis and factor analysis, the two cities with radiation capacity were identified as Beijing and Tianjin. Other cities are seen as satellite cities that receive radiation capabilities; secondly, the city's first degree was calculated and its trend of change in recent years was analyzed, as well as the city's GDP change trend in the Beijing, Tianjin, and Hebei metropolitan areas over the years. It was concluded that Beijing's agglomeration efficiency should still be much larger than its diffusion effect. Tianjin became the first to undertake the function of Beijing. In a large city, the economic functions of the metropolitan area in Hebei Province are not obvious, and the development of the entire area is extremely uneven; furthermore, using the radiation model and related theoretical knowledge, the radiation intensity of surrounding cities in the Beijing-Tianjin region was studied, and the European-European distance geo-economic relations knowledge was used to explain the phenomenon that the high radiation intensity and weak economic strength do not match. The overall analysis of Beijing-Tianjin-Hebei integration level and trends.