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Research on the synergy of urban system operation-Based on the perspective of urban metabolism

机译：城市系统运行协同效应研究-基于城市新陈代谢的视角

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Cities have been posing threats to local environment due to intensive human activities. Disordered urban metabolism can lead to unhealthy urban system operation. Studying urban metabolism can identify the characteristics and structure of urban system operations, thereby promoting sustainable development. We construct an ecological network to model the energy/material flows among the sectors of urban systemin Beijing, Shanghai, Tianjin, and Chongqing, which are the most representative cities of China. Ecological network analysis was introduced to survey the system's characteristic of structure and function. Results show that Shanghai's urban metabolic system has the highest synergism with a value of 5.04, followed by Beijing, Chongqing, and Tianjin. Different cities vary considerably in terms of the relationships among the sectors. In Beijing and Chongqing, there is mutualistic relationship between environment and primary industry. Transportation forms a mutualistic relationship with tertiary industry and other sectors Only in Chongqing. The good relationships between primary industry and construction are merely seen in Beijing and Shanghai. However, some relationships are similar in the four cities, for instance, all the relationships between primary industry and advanced industry, and between construction and advanced industry are competition; All the relationships between environment and transportation are mutualism. We further explored the network stability and found that the studied urban systems are all located in a stable status relatively. Our research could reveal the synergy of urban operation, and provide a theoretical basis for optimizing urban metabolic processes by regulating the flows and guidance for sustainable urban development. (C) 2019 Elsevier B.V. All rights reserved.
机译：由于人类的密集活动，城市对当地环境构成了威胁。城市新陈代谢紊乱可能导致城市系统运行不正常。研究城市新陈代谢可以确定城市系统运行的特征和结构，从而促进可持续发展。我们构建了一个生态网络，对北京，上海，天津和重庆等城市系统各部门之间的能源/物质流进行建模，这是中国最具代表性的城市。引入生态网络分析法来研究系统的结构和功能特征。结果表明，上海的城市新陈代谢系统的协同作用最高，值为5.04，其次是北京，重庆和天津。不同城市之间部门之间的关系差异很大。在北京和重庆，环境与第一产业之间存在着相互关系。交通运输业与第三产业和其他部门形成互惠关系。仅在重庆。第一产业和建筑业之间的良好关系仅在北京和上海可见。但是，在四个城市中，某些关系是相似的，例如，第一产业与先进产业之间，建筑与先进产业之间的所有关系都是竞争性的。环境与交通之间的所有关系都是互惠互利的。我们进一步探索了网络的稳定性，发现所研究的城市系统都处于相对稳定的状态。我们的研究可以揭示城市运营的协同作用，并通过调节流量和指导可持续城市发展为优化城市新陈代谢过程提供理论基础。 （C）2019 Elsevier B.V.保留所有权利。

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