评估城市铁路运输网络在其演变过程中的动态弹性,使用乘客人数加权网络
Tian Tian1, Yichen Liang1, Zhipeng Peng2
1College of Transportation Engineering, Chang'an University, Xi'an, Shaanxi, China.
PloS one
|September 21, 2023
概括
本研究介绍了城市铁路运输网络 (URTNs) 的动态弹性模型,评估了网络演变和节点重要性. 调查结果显示,边缘线路降低了弹性,而中央网络提高了弹性,有助于可持续的城市交通规划.
科学领域:
- 运输工程 运输工程
- 网络科学 网络科学
- 城市规划 城市规划
背景情况:
- 关于城市铁路运输网络 (URTN) 在发展过程中的长期弹性变化,研究有限.
- 现有的研究往往忽略了整个事故生命周期 (发生和修复) 以及对运输性能的影响.
- 缺乏用于识别URTN中的关键节点的全面指标.
研究的目的:
- 为URTN提出一个动态弹性评估模型,涵盖整个事件生命周期.
- 引入一个加权的综合方法来识别URTN中的重要节点.
- 用现实世界的案例研究来分析URTN在网络增长过程中的进化弹性特征.
主要方法:
- 开发一个URTN动态弹性评估模型,整合事件发生和修复.
- 引入网络运输效率指数E ((Gw) 用于定量测量弹性.
- 关于重要节点的权重综合识别方法 (WH方法) 的建议.
主要成果:
- 该研究确定了2011-2021年西安城市铁路运输网络 (XURTN) 的弹性进化特征.
- 发现较长的外围线路在攻击和修复阶段都会对XURTN弹性产生负面影响.
- 城市中心网络显著提高了损坏 (Rdam) 和恢复 (Rrec) 指数,而WH方法提高了节点识别准确性.
结论:
- 拟议的动态弹性模型和WH方法提供了对URTN弹性和关键节点重要性的准确评估.
- 结果为协同的URTN和城市空间开发提供了实际见解,增强了网络的弹性.
- 该研究强调了考虑整个事件生命周期和网络结构对于有效的URTN管理和保护的重要性.
相关概念视频
01:17Design Example: Analyzing Capacity Contours for Flood Risk Assessment
63
Flood risk assessment involves careful planning and analysis to ensure the safety of communities near water retention structures. Capacity contours are a vital tool in this process, as they illustrate the potential spread of water at specific levels in a given area. In the context of building a bund across a small valley, these contours play a critical role in evaluating the safety of nearby residential areas.In this example, the bund is intended to store stormwater in the valley. The engineers...
63
01:23Relation Between the Distributed Load and Shear
664
Understanding the relationship between the distributed load and shear force in structural analysis is crucial for analyzing beams subjected to various loading conditions. Consider the case of a beam experiencing a distributed load, two concentrated loads, and a couple moment.
664
02:12Short-distance Transport of Resources
16.1K
Short-distance transport refers to transport that occurs over a distance of just 2-3 cells, crossing the plasma membrane in the process. Small uncharged molecules, such as oxygen, carbon dioxide, and water, can diffuse across the plasma membrane on their own. In contrast, ions and larger molecules require the assistance of transport proteins due to their charge or size. Transport across membranes also occurs within individual cells, playing a variety of essential roles for the plant as a whole.
16.1K
01:23Maximum Power Flow and Line Loadability
131
The maximum power flow for lossy transmission lines is derived using ABCD parameters in phasor form. These parameters create a matrix relationship between the sending-end and receiving-end voltages and currents, allowing the determination of the receiving-end current. This relationship facilitates calculating the complex power delivered to the receiving end, from which real and reactive power components are derived.
131
01:17Rolling Resistance: Problem Solving
365
Rolling resistance, also known as rolling friction, is the force that resists the motion of a rolling object, such as a wheel, tire, or ball, when it moves over a surface. It is caused by the deformation of the object and the surface in contact with each other, as well as other factors like internal friction, hysteresis, and energy losses within the materials. Rolling resistance opposes the object's motion, requiring additional energy to overcome it and maintain movement. In practical...
365
01:21Distributed Loads: Problem Solving
666
Beams are structural elements commonly employed in engineering applications requiring different load-carrying capacities. The first step in analyzing a beam under a distributed load is to simplify the problem by dividing the load into smaller regions, which allows one to consider each region separately and calculate the magnitude of the equivalent resultant load acting on each portion of the beam. The magnitude of the equivalent resultant load for each region can be determined by calculating...
666