The Impact of Digital Finance on High-Quality Development of the Chengdu-Chongqing Economic Circle

This paper developed a comprehensive evaluation system that was able to quantify the levels of high-quality development across the cities within the Chengdu-Chongqing economic circle,and investigate the impact that digital finance had on the cities’high-quality development and the underlying mechanisms through which it achieved this.This comprehensive evaluation system was constructed using statistical data from these cities for the period 2014 to 2020 while also taking China’s high-quality development philosophy into account.The key findings revealed that:(a)Digital finance was able to significantly promote high-quality development in the Chengdu-Chongqing economic circle;(b)Digital finance had a significant positive effect in promoting innovative,coordinated,green,open,and shared development;(c)Digital finance was able to stimulate the high-quality development in the Chengdu-Chongqing economic circle by boosting entrepreneurial dynamism;(d)Digital finance had a significant impact on the high-quality development of the axis areas,while its impact was less discernible in non-axis areas.The insights from this research offer a deeper understanding of the factors that drive high-quality development,the role digital finance plays,and the mechanisms through which digital finance is able to propel high-quality development at the city cluster scale.

系统理论视域下成渝地区双城经济圈建设

成渝地区双城经济圈是一个社会生态系统,其发展是一个复杂的系统工程,不仅具有系统的整体性和关联性特征,还具有系统的结构性特征。文章从系统理论和系统结构出发,讨论推动成渝地区双城经济圈系统建设的思路与策略。在此基础上,提出通过优化文化结构、空间结构和产业结构,培植系统发展动力、重构系统发展生态、拓展系统发展空间,促进成渝地区双城经济圈协同发展。

基于SWMM不同气候区城市绿色屋顶径流调控效益研究

对比研究不同气候区城市绿色屋顶径流调控效益,可为不同气候区城市绿色屋顶水文设计和评估提供科学参考。基于北京市试验绿色屋顶2019年降雨-径流过程监测数据率定并检验SWMM,采用该模型模拟分析不同气候区城市(北京、上海、广州)绿色屋顶径流调控效益变化特征。结果表明:(1)种植佛甲草(Sedum lineare)的轻质基绿色屋顶具有较强的径流调控功能,监测期平均径流和峰值流量削减率分别为73.22%,77.63%。(2)SWMM可较精确地模拟绿色屋顶径流量和峰值流量,率定期平均Nse和R^(2)分别为0.64,0.73,检验期平均Nse和R^(2)分别为0.66,0.64。(3)在不同设计暴雨重现期下,三个城市的绿色屋顶径流削减率不同,但均随重现期的增大呈指数衰减趋势。(4)三个城市绿色屋顶径流削减率和峰值流量削减率均随基质层厚度的增加而上升,但达到某一厚度后径流调控效益不再增加,其中北京和上海的临界基质厚度为500 mm,广州为800 mm。综上,气候条件和基质厚度是影响绿色屋顶径流调控效益的主要因素,故在不同气候区城市布设绿色屋顶需综合考虑各因素,以达到最大效益。

Theoretical Research,Practice Exploration and Policy Suggestions on Scenescape Development and Ecological Value Transformation in Chengdu’s Park City Construction

The“Park City”concept presents a new,urban development model that can be used as a guide for planning the growth of a city.Advancing the transformation of Chengdu into a park city is an important and unique strategic option for maintaining and strengthening the Chengdu-Chongqing economic circle.The construction of a park city in Chengdu has many potentially positive and favorable outcomes,including maintaining natural ecosystems while improving biodiversity,livability,and enhancing the city’s historical and cultural heritage,all while establishing Chengdu as a national leader for this new urban development model.In recent years,park city scenescape modeling and the resulting ecological value transformations have been analyzed through theory,mechanism designs,and limited practice,but throughout the explorations on scenescape building and ecological value transformations,the actual construction of a park city is still facing many problems.This article argues that Chengdu should take lessons from the advanced experience in urban ecological construction efforts of other cities,both in China and overseas,focusing on sustained scenescape building,theoretical research in ecological value transformations,establishing meaningful and compatible interaction mechanisms between ecological value transformations and capital markets,improving the levels of planning and designing needed for scenescape building,establishing innovative scenescape building and ecological value transformations management systems and mechanisms,and cultivating park city scenescape brands.Related and detailed scenescape building and ecological value transformation measurement and policy suggestions are also provided in this article.