THE DIFFERENCE OF ECONOMIC FUNCTION AND THE TRENDS OF INDUSTRIAL DEVELOPMENT IN CENTRAL CITIES ALONG THE XIJIANG RIVER

The Xijiang River is an important link between Guangdong Province and the Guangxi Zhuang Autonomous Region, and a tie between its basin and the world. The zone which consists of 12 cities backing onto the main channel, including Guangzhou, Shenzhen, Nanning and Bose, etc., is an economic growing point and industry spreading origin of all the river basin. According to the nonagricultural population scale, these cities are divided into four grades. By analyzing seven indexes (GDP, nonagricultural population, gross values of industrial output, postal and telecommunication service scales, social commodity total volume of retail sales,resident saving balance, student sum in college), these cities are divided into four kinds of growing points, which show the different radiating function in different regions. The 12 cities, which have differed obviously in industry structure and the scale of the secondary＆ tertiary industry, are divided into three industry steps. By studying the difference of urban industrial function specialization in the 12 cities, the problems have been revealed in the urban industry structure developing. They are about the lower levels of the three industries, the lack of coordination with city status in the development of specialized departments, the similarity of the industry structure and the specialized departments, and so on. Based on the pattern of urban industry structure developing and the theory of regional economic step transferring, some suggestions have been discussed. They include the trends of cities’ industry developing, the change and improvement of the percentage of the three industries, the adjustment and amendment of the region and industry structure, and the labor division and location of cities manufacture.

Impact of urban expansion on regional temperature change in the Yangtze River Delta

Based on non-radiance-calibrated DMSP/OLS nighttime light imagery from 1992 to 2003, urban land area statistical data, meteorological data and land surface temperature data retrieved by MODIS and NOAA/AVHRR data, the influence of urbanization on regional climatic trend cf temperature in the Yangtze River Delta （YRD） was analyzed. Conclusions are as follows： 1） There is a significant urbanization process from 1992 to 2003 in the YRD. Four city clusters of Nanjing-Zhenjiang-Yangzhou, Suzhou-Wuxi-Changzhou, Shanghai and Hangzhou Bay form a zigzag city belt. The increase rate of annual mean air temperature in city-belt is 0.28-0.44℃/10a from 1991 to 2005, which is far larger than that of non-city-belt. 2） The urban heat island （UHI） effect on regional mean air temperature in different seasons is summer〉autumn〉spring〉winter. 3） The UHI intensity and the urban total population logarithm are creditably correlated. 4） The UHI effect made the regional annual mean air temperature increased 0.072℃ from 1961 to 2005, of which 0.047℃ from 1991 to 2005, and the annual maximum air temperature increased 0.162℃, of which 0.083℃ from 1991 to 2005. All these indicating that the urban expansion in the YRD from 1991 to 2005 may be regarded as a serious climate signal.

City Network Evolution Characteristics of Smart Industry: Evidence from Yangtze River Delta, China

The dual-path model of industrial evolution and spatial progression has been widely acknowledged and incorporated into the strategic planning to promote the development of urban industries and regional collaborations.However,current research on inter-enter-prise city networks mainly focuses on the single sector of flows on all enterprise branches,such as product value chains and production factors,but neglects that of particular industry department.Built upon the new economic geography and city networks theory,this paper develops a methodological framework that focuses on the analysis of city network evolution characteristics of smart industry.Particu-larly,a conceptual model of smart industry enterprise-industry-city is proposed and then applied to a case study of smart industry in the Yangtze River Delta Region,China.Using enterprise supplier-customer data,a city network of smart industry is constructed and sub-sequently analyzed with the proposed model.Findings indicate that the smart industry network in Yangtze River Delta Region exhibits a hierarchical structure and the expansion of the network presents a small-world network characteristic.The study not only makes a meth-odological contribution for revealing the industrial and spatial evolution path of the current smart industry,but also provides empirical support for the formulation of new economic development policies focused on smart industries,demonstrating the role of city clusters as carriers of regional synergistic development.

Structural Characteristics and Influencing Factors of Carbon Emission Spatial Association Network:A Case Study of Yangtze River Delta City Cluster,China

City cluster is an effective platform for encouraging regionally coordinated development.Coordinated reduction of carbon emissions within city cluster via the spatial association network between cities can help coordinate the regional carbon emission management,realize sustainable development,and assist China in achieving the carbon peaking and carbon neutrality goals.This paper applies the improved gravity model and social network analysis(SNA)to the study of spatial correlation of carbon emissions in city clusters and analyzes the structural characteristics of the spatial correlation network of carbon emissions in the Yangtze River Delta(YRD)city cluster in China and its influencing factors.The results demonstrate that:1)the spatial association of carbon emissions in the YRD city cluster exhibits a typical and complex multi-threaded network structure.The network association number and density show an upward trend,indicating closer spatial association between cities,but their values remain generally low.Meanwhile,the network hierarchy and network efficiency show a downward trend but remain high.2)The spatial association network of carbon emissions in the YRD city cluster shows an obvious‘core-edge’distribution pattern.The network is centered around Shanghai,Suzhou and Wuxi,all of which play the role of‘bridges’,while cities such as Zhoushan,Ma'anshan,Tongling and other cities characterized by the remote location,single transportation mode or lower economic level are positioned at the edge of the network.3)Geographic proximity,varying levels of economic development,different industrial structures,degrees of urbanization,levels of technological innovation,energy intensities and environmental regulation are important influencing factors on the spatial association of within the YRD city cluster.Finally,policy implications are provided from four aspects:government macro-control and market mechanism guidance,structural characteristics of the‘core-edge’network,reconfiguration and optimization of the spatial layout of the YRD city cluster,and the application of advanced technologies.

Spatial Pattern and Heterogeneity of Port & Shipping Service Enterprises in the Yangtze River Delta,2002–2016

Using the ‘theoretical hypothesis—empirical study—case verification' method, this paper studies the spatial distribution and differentiation of port & shipping service enterprises(PSSE), as well as the variation process and underlying mechanism in the Yangtze River Delta(YRD). First, through inductive and deductive reasoning, we propose the following hypothesis: the regional distribution of different types of PSSE would show different spatial agglomeration-decentralization tendency; and there would be distinct regional differentiation in the industrial structure of the enterprises. Second, based on data obtained from enterprises, empirical research is conducted using Gini coefficient and spatial interpolation simulation methods. Results show that: 1) The overall enterprise distribution is decentralized within a city. 2) Different types of enterprises show different spatial agglomeration-decentralization tendencies. At 3000 m×3000 m grid scale, there is an agglomeration tendency along seas and rivers in the spatial distribution of enterprises. Shanghai has been identified consistently as a hot spot. 3) There is significant regional differentiation in 12 port cities with respect to the industrial structures of enterprises. Finally, the transportization and the increase of shipping service demand, the globalization and the expansion of multinational corporate activities, the hierarchization and the cooperation among port cities as well as the decentralization and the behavioral difference between the central and local states can be seen as main driving mechanism of the spatial phenomenon.

Urban Development and Water Management in the Yangtze River Delta

Throughout the history of the world, the development of the cities are related to the large water systems and the ocean. Where the river is abundant, the trade and regional centres could be formed. However, along with the prosperity of the water-cities, massive urban construction and environmental issues are enormous challenges in human process. A “scientific” urban planning, “Sponge City”, “Resilient City”, regional and urban culture and characteristics get more and more attention. The theme of “water and city” is clearly of great historical value and practical significance for the new resilient urban and water management strategies. The paper will summarize characteristics of geographical, historical, socio-cultural and political realms in metropolitan deltas and the historical governance as well as the recent developments in the Yangtze River Delta. It will introduce urban development and water management in four water cities: the canal and the city-Yangzhou, the river and the city-Nanjing, the lake and the city-Suzhou and the sea and the city-Shanghai. And then it will analyze the inner motivation of the interaction between water and cities in Yangtze River Delta. Furthermore, learning from successful historical experiences, the paper will provide suggestions for future sustainable urban development.

UNITED INTERNATIONAL CENTRAL CITY: A NEW SPATIAL ORGANIZATION MODEL IN TUMEN RIVER ECONOMY DEVELOPMENT ZONE

This paper puts forward a new conceptual idea on constructing an international central city in the Tumen River Economy Development Zone (TREDZ) on the basis of analysis of the superiorities and problems in developing city, and from the view point of present social, economic and natural conditions in this area and the background of Northeast Asia. The united international central city is the best distribution model not only in its polycentric spatial structure but also in organizing form. Its feasibility and practicability are thoroughly proved from various aspects including urban planning principles, comparison of port cities, special characteristics of cooperation in TREDZ, and natural, social, cultural factors etc.

Materializing the “Urban Region” Concept by Integrating Ecological Networks and Central Place Theory

This paper attempts to integrate urban development and ecological conservation by applying and syncretizing the “urban region” concept from landscape ecology and the “city-region” concept from socioeconomics. First, various concepts pertaining to regions are discussed and then, the integration of ecological conservation and urban development on a regional scale is introduced. Subsequently, the Greater Pearl River Delta, in China, is used as a case study area and landscape ecology’s “urban region” concept is applied to produce a landscape spatial arrangement framework for an urban region. This framework is achieved through the following steps: conceiving the study area as a region that consists of two urban regions, arranging ecological conservation landscapes by establishing a regional ecological network within the urban-region rings;and formulating an urban development strategy using central place theory. The resulting landscape spatial arrangement solution includes natural protection areas that cover half of the study area, several key strategic urbanizing locations, and suggestions for the strict protection of certain agricultural land-use areas. We believe that this framework facilitates a feasible exploration of land-use planning on a regional scale, although more in-depth studies are required to refine this approach.

Analysis of city centrality based on entropy weight TOPSIS and population mobility:A case study of cities in the Yangtze River Economic Belt

Based on statistical data and population flow data for 2016,and using entropy weight TOPSIS and the obstacle degree model,the centrality of cities in the Yangtze River Economic Belt(YREB)together with the factors influencing centrality were measured.In addition,data for the population flow were used to analyze the relationships between cities and to verify centrality.The results showed that:(1)The pattern of centrality conforms closely to the pole-axis theory and the central geography theory.Two axes,corresponding to the Yangtze River and the Shanghai-Kunming railway line,interconnect cities of different classes.On the whole,the downstream cities have higher centrality,well-defined gradients and better development of city infrastructure compared with cities in the middle and upper reaches.(2)The economic scale and size of the population play a fundamental role in the centrality of cities,and other factors reflect differences due to different city classes.For most of the coastal cities or the capital cities in the central and western regions,factors that require long-term development such as industrial facilities,consumption,research and education provide the main competitive advantages.For cities that are lagging behind in development,transportation facilities,construction of infrastructure and fixed asset investment have become the main methods to achieve development and enhance competitiveness.(3)The mobility of city populations has a significant correlation with the centrality score,the correlation coefficients for the relationships between population mobility and centrality are all greater than 0.86(P<0.01).The population flow is mainly between high-class cities,or high-class and low-class cities,reflecting the high centrality and huge radiating effects of high-class cities.Furthermore,the cities in the YREB are closely linked to Guangdong and Beijing,reflecting the dominant economic status of Guangdong with its geographical proximity to the YREB and Beijing's enormous influence as the national political and cultural center,respectively.

长江中下游城市内涝与雨季污染协同治理对策

针对长江中下游城市内涝与雨季污染协同治理的突出问题,对城市水安全、雨季水体返黑返臭风险和河湖水生态退化三方面存在的问题进行了论述。发现长江中下游城市河网密度高、降水量大、暴雨多发,同时人口密集、经济发展水平高,内涝、污染、生态退化等水问题突出;城市内涝频发,雨季污染造成某些城市水体局部返黑返臭,严重影响城市水环境品质,成为制约长江中下游城市绿色发展的重要瓶颈问题。提出了建立三级内涝协同防治体系、构建城市“绿-灰-蓝”设施耦合工程体系、协同推进水体品质提升与生态修复等建议。

创新企业的中微观集聚特征及邻近性机制研究——基于长三角地区4座典型城市的实证

在创新型经济重构空间使用逻辑的背景下,以解析城市内部创新要素的集聚和选址为出发点,构建创新企业集聚的邻近性框架,运用中小型创新企数据以及问卷调查数据,对长三角上海、南京、杭州、苏州4座典型的创新型城市进行研究,透视创新在空间利用上的新变化和新需求。研究得出以下结论:(1)集聚趋势。在我国内城更新与新城开发同步推进的城镇化语境下,创新企业的集聚兼具回归城区和近郊生长的双重动力,而且低密度、品质高的新兴园区与创新人才的需求形成了较好契合。(2)结构演化。创新企业的集聚结构与城市的空间转型、功能演化形成紧密互动。城市的区域职能分工、空间结构对企业的集聚有深刻影响。创新企业的集聚强度由中心向外围衰减,形成半径为1~3 km的核心-边缘结构。(3)区位逻辑。除政策、产业等传统因素外,创新企业不仅侧重于向“年轻集群”和应用导向的科研集群集聚,而且呈现出明确的生活指向,品质、氛围等软性因素成为不可忽视的高阶需求。

长江流域环境案件跨区域集中管辖问题研究

以行政区划为标准的传统环境司法管辖模式与长江流域环境保护的生态性、整体性、系统性相矛盾,而流域环境案件集中管辖可作为破解环境治理难题的关键路径。通过实证分析可以发现,目前长江流域所涉各省跨行政区划集中管辖的具体实践存在行政区划分离程度不高、法律规范依据不足、环境司法专门机构设置衔接不畅等制约因素。因此,要明确以流域治理所遵循的整体和系统理论为基础,确立长江流域地理单元为基础的整体环境治理理念,确保集中管辖实质效用得到发挥;确立与完善流域跨行政区划环境案件管辖法律规范供给,为司法实践提供统一标准遵循;坚持环境司法专门化改革,以长江生态环境法院为基础框架发展完善专门管辖,以便破除行政区划对流域环境司法的阻碍,增强流域集中管辖的规范性、有效性。

长江武汉段天兴洲低滩沉积物粒度端元对河流-风成沙丘沉积环境的指示意义

河床沙波向风成沙丘演变的过程具有特殊的沉积动力机制。笔者等以68份长江武汉段天兴洲洲头低滩沉积物的粒度分布数据为例,利用端元分析方法从每个粒度分布中分离提取4个粒度端元组分(EM1、EM2、EM3和EM4),探讨了河流—风成沙丘不同沉积环境中粒度端元的异同。研究结果表明:EM1和EM3组分在粒度分布中占比与沉积物粒度中值分别呈较好的线性正相关和负相关;河流沉积物主要由EM1、EM2和EM3组成的跳跃方式搬运,对应滚动次总体的EM4组分占比5%~10%,少悬浮搬运;风成沙纹沉积物主要包括两段跳跃次总体,以EM2组分为主、EM1和EM3组分为辅,少EM4组分;沙丘背风面沉积物主要靠颗粒流顺坡滑塌,以EM2组分为主、EM1和EM3组分为辅,含占比约为5%的EM4组分;未被风成沙纹覆盖的沙丘波谷沉积物记录了河流和小型滞水洼地的沉积特征,代表滚动次总体的EM4组分占比7%~15%,悬浮次总体占比可达20%。本文提取的沉积物粒度端元为弱风环境中河道内局部小型河流—风成沙丘的沉积环境和演化过程研究提供了参考。

智力资本对长江经济带智慧城市建设的作用研究

智慧城市建设是未来我国城市高质量可持续发展的重要选择,也是现阶段我国推进新型工业化、发展新质生产力的重要途径。将智慧城市建设的技术中心主义和人本主义相结合,从资本、人、技术、空间建构智慧城市要素指标,阐释智力资本通过人力素质、智力产出、科技投入、开放水平四大方式促进智慧城市经济增长的作用机理。构建生产函数模型,运用长江经济带2002—2022年面板数据分析11个核心城市智力资本对智慧城市经济增长的影响。结果表明:不同智慧城市的未来发展存在共性与特性,长江经济带智力资本的集聚对智慧城市经济增长有显著的促进作用,其分解要素对不同区域及不同级别智慧城市的经济增长作用呈异质性,而开放水平是现阶段最为重要的因素。在此基础上,提出有利于长江经济带智慧城市经济发展的对策建议:从数字孪生城市建设、产业数字化发展、数字化转型要素集聚等方面入手,实施不同区域、不同等级城市分类指导的智慧城市发展战略;以智慧城市建设的市场需要为导向,聚焦智力产出的市场转化,发挥智力资本的影响推动作用;推进智力资本各要素的有效整合,加强“技术+人本”互嵌,促进数据要素跨域流通。

技能型社会背景下世界技能大赛获奖选手的职业发展思考——对长三角四省市获奖选手的分析

基于技能型社会建设背景,对第41~46届世赛长三角四省市获奖选手的职业情况进行统计分析,得出其就业相对稳定、教职为职业首选、技能培训为主要工作内容和近年就业愈加灵活四方面的主要职业特征。技能型社会建设对世赛获奖选手提出了精进自身技能、完善技能标准、改善技能环境和拓展国际影响四方面的新要求;获奖选手在职业发展中需要解决来自职业技能、职业视野以及职业路径三个方面的主要挑战。针对上述要求和挑战,论文提出了完善政策内容制定、搭建学习培训平台、优化实践内外环境,以及统筹设计选手职业发展路径等具体改革建议。

低碳城市试点与长江经济带经济高质量发展:影响机制与实证检验

绿色是经济高质量发展的鲜明底色,而作为我国生态文明建设的重要举措,低碳城市试点有助于推动经济高质量发展。本文采用长江经济带2004-2020年108个城市市级面板数据,使用多时点双重差分模型,实证探究低碳城市试点对经济高质量发展的影响效应,研究发现:(1)低碳城市试点有利于提升长江经济带经济高质量发展水平,且政策效果具有滞后性,该结论在进行一系列稳健性检验后依旧成立;(2)异质性分析表明,从区位特征来看,低碳城市试点对长江上游地区经济高质量发展水平的提升效果更明显;从城市人口规模来看,低碳城市试点对人口规模较大城市的政策效果往往更明显;(3)机制分析表明,吸引外商直接投资是低碳城市试点促进长江经济带经济高质量发展的重要传导机制。

新时代港口与城市协调发展研究--以长三角地区为例

研究聚焦经典的港城关系问题,在新时代背景下重新审视港口与城市互动发展的新内涵。以长三角为案例区域,利用耦合度、耦合协调度模型,定量测度2013年以来长三角地区24个港口与城市的协调发展水平,结果显示:长三角地区港口与城市耦合协调度整体上升明显,呈现“高水平耦合、中水平协调”的特征;在省域尺度,三省一市港城关系耦合度和耦合协调度均存在明显的梯度差异,由东向西逐渐下降,具体表现为C/D上海>C/D江苏>C/D浙江>C/D安徽;在城市尺度,长三角地区绝大部分港口与城市已经进入高度耦合、良性发展阶段,仅有舟山和池州港城耦合情况不理想。耦合协调度形成显著的4个等级,包括:以上海为代表的极度协调型,以苏州、宁波、南京、无锡为代表的高度协调型,以杭州、南通、扬州、芜湖等12个城市为代表的中度协调型,以湖州、台州、合肥、安庆等7个城市为代表的低度协调型。最后从统筹协调、港城融合、政策创新、开放包容等方面提出长三角地区港城协调发展的路径。

国家“双区”战略背景下江西对接融入粤港澳大湾区的机遇与对策

党的十八大以来,以习近平同志为核心的党中央对粤港澳大湾区建设提出了一系列新论断、新目标、新要求,明确将粤港澳大湾区建设成为富有活力的国际一流湾区和世界级城市群。这一战略举措对江西赣州对接粤港澳大湾区,加快经济现代化建设、打造全国构建新发展格局重要战略节点具有重要示范作用。粤港澳大湾区建设将畅通对外综合运输通道、辐射带动环泛珠三角、打造国际金融枢纽、加快产业梯度转移、打造国际科技创新中心、打造巨大消费市场,为江西带来新的机遇。同时为赣州带来了产业辐射、金融辐射、科技创新辐射、消费辐射和交通辐射。据此,江西应积极对接融入粤港澳大湾区,加大赣州承接产业转移力度,构建粤赣产业协作示范区;构建粤赣金融合作平台,推动“三南”园区一体化发展;加强科研创新能力,推进粤赣科技创新常态化合作;提升赣州国际陆港能级,加快江西融入“轨道上的大湾区”;打造粤港澳大湾区后花园,加快江西融入“大湾区两小时旅游圈”。

数字经济、科技创新与出口技术复杂度--基于长三角地区41个城市的实证

基于2012-2021年长三角地区41个城市的面板数据探讨数字经济对制造业出口技术复杂度的影响效应和科技创新在此影响过程中的中介效应,考察了科技金融的调节效应。数字经济显著推动长三角地区城市制造业出口技术复杂度的提升,但提升作用因环境规制严苛程度、人力资本水平、中心区城市地位属性的差异而存在异质性。数字经济通过科技创新推动制造业出口技术复杂度提升,金融科技在数字经济推动长三角地区城市制造业出口技术复杂度提升中发挥负向调节效应。提高制造业出口技术复杂度,要加快发展数字经济,因地制宜实施发展政策,助力科技创新与金融服务的高质量融合发展。

高铁网络发展下的站城空间与功能关系研究--以长三角地区为例

在过去近20年里,中国高铁网络化已成为城市和区域空间发展的重要推动力,各级政府也在不同层面上实施了高铁站区建设与城市空间协同发展策略。为此,建立站城空间及站城功能联系的分析框架,以长三角为案例区,探讨不同类型高铁站的站区发育及站城关系特征。结果表明,长三角地区高铁站城联系具有较大的分异特征,大多站区功能发育水平较低,区域中心城市和部分地级城市与其主要高铁站区之间相互强化发展,而其他高铁城市与站区之间功能联系有待提升,不同类型高铁站的站城功能联系发育水平受站区、城市和区域因素的交互影响。结合站区发展潜力、地区差异化的高铁出行需求、城市空间发展规划,建议提升站城交通服务质量、分类分级培育站区主导功能、优化站城功能联系。