对中国城市聚合区的时空进化特征和城市代谢效率的模拟预测研究
Weifeng Wang1,2, Hongtao Li3
1School of Ethnology and Sociology, Guangxi Minzu University, Nanning, 530006, China.
Scientific reports
|March 5, 2026
概括
中国的城市代谢效率 (ME) 总体中等,具有显著的分层和两极化. 城市聚合区之间的技术差距比城市内部的差异更大,是造成效率低下的原因,需要针对可持续城市化制定有针对性的政策.
科学领域:
- 城市研究是城市研究.
- 环境经济学环境经济学
- 区域科学 区域科学
背景情况:
- 城市代谢效率 (ME) 对于可持续的城市化至关重要,它将资源使用与环境影响联系起来.
- 在城市聚集地规模,特别是中国,对ME的系统证据仍然有限.
- 了解ME驱动因素和空间动态对于有效的城市规划和政策至关重要.
研究的目的:
- 从2006年到2022年,测量和分析中国城市聚集区的ME.
- 将ME无效性分解为聚合区间和聚合区内的组件.
- 确定ME的决定因素并探索其时空动态.
主要方法:
- 基于材料流的索引系统和动态元边界SBM-DEA模型,具有不理想的输出.
- 超边界低效率分解成技术差距和剩余组件.
- K-意味着集群,马尔科夫链,空间马尔科夫链,面板托比特模型和空间内核密度分析.
主要成果:
- 总体而言,中国城市聚集区的ME是中等的,具有显著的分层和两极化.
- 聚合区间的技术和制度差距比聚合区内部的分散更有助于低效率.
- 观察到强烈的路径依赖和俱乐部融合;数字化和教育支出对ME产生了积极的影响.
结论:
- 需要不同的政策来解决跨聚合区的技术差距和聚合区内部的协调.
- 解决核心城市的低效率问题和支持中等效率城市对于平衡发展至关重要.
- 可持续的城市化需要将经济目标与城市聚集地规模的环境管理相结合.
相关概念视频
Metabolic Rate
1.3K
The human body is a powerhouse of energy, with every cell performing numerous functions that require energy. This energy production and consumption is measured by the metabolic rate, which quantifies the total heat generated by all the body's chemical reactions and mechanical work. This measurement helps to determine the rate of kilocalorie (kcal) consumption needed to fuel all ongoing activities.
The Basal Metabolic Rate (BMR) measures the energy expended at rest.
Several factors influence...
The Basal Metabolic Rate (BMR) measures the energy expended at rest.
Several factors influence...
1.3K
Modeling with Differential Equations
137
Population dynamics can be described mathematically by considering the population size P(t) as a function of time. The rate of change of the population is then represented by the derivative of P(t). A simple assumption is that the rate of growth is proportional to the size of the population itself. This leads to an exponential growth model, where the population increases rapidly without bound. While this is a useful first approximation, it does not reflect realistic long-term...
137
Mechanistic Models: Compartment Models in Individual and Population Analysis
312
Mechanistic models are utilized in individual analysis using single-source data, but imperfections arise due to data collection errors, preventing perfect prediction of observed data. The mathematical equation involves known values (Xi), observed concentrations (Ci), measurement errors (εi), model parameters (ϕj), and the related function (ƒi) for i number of values. Different least-squares metrics quantify differences between predicted and observed values. The ordinary least...
312
Exponential Equations for Modeling Growth
292
Exponential models are essential for describing rapid, multiplicative changes in natural systems, such as population growth. When a population doubles at regular intervals, the process can be modeled using a suitable base. For instance, a bacterial culture that doubles every three hours follows the model n(t)=n0⋅2t/3, where n(t) is the population at the time t.A more general model uses the natural base e, especially for continuous growth. This takes the form n(t)=n0⋅ert, where r is...
292


