Design Strategies for Landscape Transformation of Abandoned Railways in Urban Centers

The railways have significantly contributed to the economic development of the city.However,with the evolution of the city and adjustments in the industrial structure,the relocation and rerouting of major railway trunk lines have resulted in the abandonment of numerous urban railways.The abandoned railways,resulting from inadequate management,have transformed into sites for waste disposal and are particularly vulnerable to environmental issues,including land pollution,degradation of vegetation cover,and a decline in ecological diversity.Abandoned railways in urban centers significantly hinder transportation connectivity and adversely influence the aesthetic appeal of the city.The landscape transformation of these abandoned railways is of paramount importance in the context of urban renewal.These railway sites possess significant potential for stock utilization as specialized,underutilized spaces.Through the processes of re-planning,integration,and renewal,previously underutilized spaces can be revitalized and incorporated into the urban landscape in innovative ways.This approach not only enhances the availability of green leisure areas for residents but also contributes to the realization of sustainable urban development.

Analysis of Urbanization Based on Center-of-gravity Movement and Characteristics in Songhua River Basin of China and its Southern Source Sub-basin between 1990 and 2010

Urbanization in modern times led to a series of development strategies that brought new opportunities in China. Rapid urbanization caused severe stress to the ecosystems and the environment. Using the center-of-gravity(COG) method and parameters such as population, economy, and land, we studied the urbanization pattern in Songhua River Basin and its southern source sub-basin from 1990 to 2010. Urbanization was analyzed based on the COG position, eccentric distance, movement direction of COG, and distance of COG movement. Various characteristics of urbanization in the southern source sub-basin of the Songhua River were explained in relation to the whole Songhua River Basin. Urbanization in the southern source sub-basin of the Songhua River is balanced, relatively advanced, and stable compared to the whole Songhua River Basin. The average eccentric distance between the urbanization COGs in the Songhua River′s south source basin indicated rapid expansion of land urbanization during the span of this study. A basic pattern of urbanization COG in the whole Songhua Basin was observed, but there existed differences among the three aspects of urbanization process. Land urbanization is still in its active stage, so future studies should focus on analysis of such urbanization trends.

GIS Application in Urban Flood Risk Analysis: Midar as a Case Study

The significance of this study lies in its exploration of the advanced applications of Geographic Information Systems (GIS) in assessing urban flood risks, with a specific focus on Midar, Morocco. This research is pivotal as it showcases that GIS technology is not just a tool for mapping, but a critical component in urban planning and emergency management strategies. By meticulously identifying and mapping flood-prone areas in Midar, the study provides invaluable insights into the potential vulnerabilities of urban landscapes to flooding. Moreover, this research demonstrates the practical utility of GIS in mitigating material losses, a significant concern in flood-prone urban areas. The proactive approach proposed in this study, centered around the use of GIS, aims to safeguard Midar’s population and infrastructure from the devastating impacts of floods. This approach serves as a model for other urban areas facing similar challenges, highlighting the indispensable role of GIS in disaster preparedness and response. Overall, the study underscores the transformative potential of GIS in enhancing urban resilience, making it a crucial tool in the fight against natural disasters like floods.

Design and Study on Management Tools of Land Data Center for Integration of Urban and Rural Areas

The rapid development of urbanization requires land management business should change the former single systematic pattern, and advance to integration of functions and data sharing. In order to meets the requirement, this paper presents a new thinking for land management pattern, and management tools of data center for integration of urban and rural areas. The tools were based on MapGIS, which have made the management of multi-subjects, multi-areas, multi-sources and multi-measurement data possible. The techniques of this system are designed accord with national related standard. Experimental result shows that the tools have obvious technical advantage in land resource business integration management.

Data Center as a Key Player of a District Electric Power and Heat Network System： A Comparison in Urban and Suburb Regions

A DC （data center） demands air-conditioning power as large as the 1/3-1/2 of total electricity consumption. Thus, energy saving of cooling power of DC yields considerable effect on both economic and environmental views. PV （Photovoltaic） and absorption refrigerator with CGS （cogeneration systems） or gas boiler are possible power saving options. The waste warm air from DC would be utilized for greenhouse heating when DC and greenhouse locate near in the suburbs. In this study, the authors develop an energy network model to assess the potential contribution of DC as a major electric power and chilled air consumer as well as the warm air supplier in a district to the energy efficiency improvement. The evaporation heat of LNG （liquefied natural gas） utilization is also considered as well as PV, CGS. This model is applied to the cases of the urban area in Tokyo which involves athletic center, shops and hospital and the suburbs including greenhouse and then compared.

Differentiation and restructuring-new space for development of urban center area:a case study of Shizhong District of Ji'nan City

Taking the development tendency of current world industrial development as the background, this paper restructures the internal space of urban center area by illustrating reasons for internal space differentiation of urban center area, that is to say, according to the tertiary industry interior's high-end of value chain after convergence among the primary, the secondary and the tertiary industries, the space structure of urban center area will form the space development mode with characteristic modern service industry cluster districts through vertical segmentation, horizontal derivatization and block aggregation and realize perfect space renewal of urban center area in the end.

Case Study:Topography Integrated Urban Center Concept Project on Coastal Line of Kartal/İstanbul

The concept of creating a Topography integrated urban center is to create an urban center that integrated with the city.The first step of the Concept is to settle by using the natural elevation in the land and to create volumes compatible with land by raising together with the elevation.While the passenger circulation at starting elevation is moved into a project with the cavestyle volume settled in land elevation.The new area of the square to be defined in the center of the building is intended to form an area combining the neighboring squares Kartal Square and Freedom Square,as well as contributing to the silhouette of Kartal from the sea with the location of the square and building.The project is a central complex design that deals with various urban problems thanks to professionals,local people of Kartal,and clubs which established with the municipality in a comprehensive way to search for solutions to be organized urban workshops and conferences.

城市群背景下的中国消费中心发展研究

消费中心和城市群都是我国重要的区域发展对象,两者之间联系紧密,互动性强。消费中心概念的引入,能够为现有城市群研究提供新视角。城市群作为消费(中心)城市群,能够促进区域消费经济大发展,体现出消费性质差异化、消费形式多样化、消费水平层级化、消费内容普遍化、消费中心化、消费联系性强、消费完整度高、消费文化认同度高等特征,具有消费集聚构建宏大消费场景、消费中心化汇集更多消费动能、消费极化提升区域消费发展层级、整合消费形成区域消费竞争力等多重机制。基于熵值法、Dagum基尼系数及其分解法、Kernel估计法的量化分析表明,各城市群消费中心发展水平总体上呈稳定上升趋势,但不同城市群发展差异大。总体基尼系数走势较为平缓,甚至呈缓慢下降的态势。需要强化体制机制建设,以(国际)消费中心(城市)建设推动城市群发展。

受突发事件影响的城市应急物流中心选址模型及其实证

主要研究受突发事件影响下的城市应急物流中心选址问题。结合城市应急物流中心选址的多目标规划方法,建立考虑灾前配置及灾后配送的应急物流中心多目标选址模型。介绍了遗传算法(GA)基本原理,并针对城市应急物流的特点,考虑求解多目标规划模型,在遗传算法的基础上加入免疫算法(IA)的特性,使用一种组合的遗传算法——免疫遗传算法(IGA)。使用MATLAB免疫遗传算法对该模型进行求解,由结果可知该算法适用于多目标的城市应急物流中心选址问题,并通过实例验证模型及算法的合理性和有效性。

包容性视角下的城市中心区边缘社区更新规划研究——以重庆渝中区白象街社区为例

在城市快速扩张过程中,位于中心区边缘的老旧社区面临挑战,其与中心区的物质空间与经济环境形成鲜明对比。以重庆市渝中区白象街社区现存问题为切入点,通过实地调研分析其区位、历史、人群结构与需求、物质空间等,明确社区面临功能滞后、空间断裂和人群隔阂等问题,从包容性视角提出“串渝中、融社区、游建筑”的更新优化策略,制定适合社区可持续发展的更新规划方案,以期为城市中心区边缘社区优化提供参考。

城市轨道交通实训中心智能运维管理系统设计

设计了一种基于云-边协同架构、多专业协同融合的城市轨道交通实训中心智能运维管理系统。首先,分析智能化时代实训中心多专业的融合协同、集成化的实时监测、智能化的故障预防、信息化的资源管理、数字化的场景输出和多方面的反哺机制等需求;其次,基于云-边协同架构,对系统逻辑架构和物理架构进行设计;最后,应用智能感知、数据库、云边协同、故障预测与健康管理等技术,实现智能运维管理系统实时监控、数据管理、健康管理、应急管理、物资管理和教学管理等功能。系统测试结果表明,该系统能有效实现上述功能,显著提高实训中心的智能运维管理水平。

弱天气背景下天津三次局地突发暴雨中尺度特征及触发机制

利用ERA5再分析(0.25°×0.25°)、加密自动气象站、多普勒天气雷达和变分多普勒天气雷达分析系统等高时空分辨率资料,对比分析了2018年7月22日、2019年7月18日、2021年8月23日天津中心城区三次局地突发性暴雨过程的中尺度特征及其触发机制。结果表明:三次局地突发性强降雨均无明显天气尺度系统主导,但环境大气具备较高的对流不稳定能量和较小的对流抑制能量,抬升凝结高度仅0.2~0.4 km,且低层均存在一定的湿层。局地突发性暴雨的发生与城市热岛及海陆下垫面特征差异造成的中小尺度系统有关,暴雨发生前天津中心城区与沿海地区之间的温差和气压差增大,中心城区附近温压场具有明显的非均匀分布特性,中尺度暖低压及其东侧的高温度梯度为局地对流发生提供了有利的中尺度环境条件。此外,暴雨发生前沿海地区均出现了明显的海风加强,城市热岛暖低压辐合与海风风速辐合共同作用使得中尺度辐合强度明显加强,是局地突发性暴雨发生的主要原因,初生的γ中尺度对流单体均位于地面强辐合中心边缘上空。

2000—2018年长株潭城市群城市扩张及其热岛响应

城市热岛效应同城市居民福祉息息相关,特别是近20 a我国的中西部城市在快速城市化的背景下,城市扩张进程进一步加快,城市热岛效应的影响也随之不断增加。为探究城市及城市群扩张与城市热岛效应变化的关系,以长株潭城市群为研究区域,利用Boyce-Clark形状指数分析城市扩张进程及空间形态变化。首先,利用基于Google Earth Engine(GEE)平台的实用单通道算法进行温度反演;然后,使用均值-标准差法划分温度等级区并定义和提取城市热岛范围;最后,提取城市重心和热岛重心,采用重心迁移方法分析城市扩张与热岛效应之间的变化趋势。结果表明城市热岛变化与城市群城市扩张趋势一致,研究结论如下:①2015年后长株潭城市群进入高速发展关键时期;②城市扩张是热岛面积增加的主要原因;③城市热岛重心与城市重心迁移趋势基本一致,城市热岛范围增加的方向也同城市扩张方向基本一致。

城市历史景观(HUL)视角下的城市中心区工业遗产更新设计研究——以南宁市新阳路片区为例

近些年来,随着我国逐步进入后工业景观时代,对工业遗产的保护和利用越来越受到公众的关注,新形势下如何保护、活化及利用城市中心区工业遗产也成为了政府在城市更新中需要面对的问题。文章基于城市历史景观(HUL)理念,通过分析南宁市西乡塘区新阳片区的历史层积及现状环境,从更新、激活及耦合三大手法提出新阳路工业遗产及街巷更新设计的策略。以期探寻遗产保护与城市更新双赢的可持续发展路径,希望能为同类地区城市中心区工业遗产的更新提供一定的借鉴。

知识资本积累、空间溢出与城市群创新中心形成——以长三角城市群为例

基于新经济地理学拓展的三地区局部溢出(LS)模型,对城市群创新中心的形成机制、结构特征和空间演化进行理论分析,然后对最具“创新城市群”特征的长三角城市群进行实证检验,结果显示:(1)城市群创新中心形成的循环累积因果关系在于知识资本积累,随着知识资本集聚,城市知识生产(创新)成本逐渐降低,进而促使知识资本更为内生地集聚,如此循环反复,最终促进了城市群创新中心形成;(2)知识资本空间溢出是创新中心形成的主导因素,城市群不同地区知识资本本地溢出和跨地溢出存在差异,进一步强化了城市群“创新中心—边缘城市”结构;(3)城市群创新互动在于创新中心知识溢出巩固了“群”结构,边缘城市的承接作用使得“中心”更具竞争力,进而提升了城市群整体福利水平;(4)在长三角城市群,本地市场效应和知识资本溢出效应促进了创新中心的形成,市场拥挤效应则起到了抑制作用。打造城市群创新中心是推动国家创新驱动发展战略和城市群创新发展格局的重要基石,文章为解决中心城市虹吸、优化配置创新资源提供了新思路,也为建设城市群创新体系、培育城市群创新中心提供了理论依据与决策参考。

基于P-中心模型的城市轨道交通线网应急救援站选址研究

[目的]随着城市轨道交通线网的扩大,其系统风险变得更为复杂且不可控。为提高城市轨道交通系统的应急救援能力,需对线网内应急救援站的选址问题展开研究。[方法]将地铁覆盖区域按照城市道路环线进行分区限速,得到任意路径的速度矩阵,结合距离矩阵进行转换后得到时间矩阵。在此基础上,计算任意站点间基于时间的最短路径。考虑时间、救援关系、成本3个方面的约束条件,建立了以系统最大救援时间最小化为目标的P-中心选址模型。以武汉市城市轨道交通线网应急救援站选址为案例,应用该模型,并采用自适应遗传算法在MATLAB软件中进行编程求解,得出该线网应急救援站选址的最优方案。[结果及结论]与相似研究相比,该选址方案投入更少但效益更大,充分证明了所提的P-中心模型具有先进性。

以场景营城助推成都都市圈消费副中心建设的眉山对策研究

眉山作为成都都市圈重要节点城市,拥有较为突出的地理区位、空间承载、生态文化优势。随着同城一体化发展的加快,眉山主动承接大都市功能疏解,借助都市圈推动优势资源向发展成果转化,打造成都都市圈消费副中心,将成为眉山提升城市发展能级的重大契机。眉山成都都市圈消费副中心打造过程中存在的困难主要有:消费能级不高,区域发展不均衡;主体培育不足,商业集聚度不足;品质场景缺乏,消费吸附力较弱等。据此,文章提出从场景营城的角度探索适用于眉山消费场景营造的对策建议,以期助力眉山打造都市圈消费副中心。

由城市文体中心设计探索地域特色的融入与创新

探讨了在当代城市规划与建筑设计中,将地域特色融入城市文体中心设计的重要性,分析了包括地方文化、历史传统、自然环境、经济技术背景以及社区参与等方面的影响。通过案例研究,展示了如何有效整合这些元素,创造出既符合现代城市需求又富含地域文化特色的文体中心,促进城市文化的传承与社会发展。

市域铁路调度中心级路网综合监控系统设计

文章研究了市域铁路调度中心级路网综合监控系统设计,在明确市域铁路特点以及调度功能需求的基础上,从系统总体定位、系统设计原则、系统功能设计、系统主要构成、软硬件设计等方面出发,分析了综合监控系统设计要点,有利于减少路网运行风险,提高线路资源的集中监控和整合利用水平,推动市域铁路实现更高质量的发展。