Subjects: Geosciences >> Geography submitted time 2022-03-28 Cooperative journals: 《干旱区研究》
Abstract：城市化的加快推进使得土地利用变化加剧，进而导致城市热环境问题日益突出。基于2005年和2018年夏季的MYD21A2地表温度数据，运用空间统计学方法分析了LST的时空分布格局，并结合土地利用数据，通过贡献度指数，对天山北坡城市群地表覆盖类型和行政区划的源汇角色特征进行了分析。结果表明：（1）20052018年建设用地、耕地增长显著，冰川、林地等自然资源地类显著减少，说明城市的发展对生态环境和自然资源造成了较为严重的影响。（2）地表温度等级的空间分布与海拔呈负相关关系，20052018年高温度等级在白天的空间分布有离散化趋势，而夜间则相反，夜间高温度等级空间分布整体有向东南迁移的趋势。（3）不同城市、不同地表覆盖类型由于自然条件、比热容等物理性质的不同，其白天和夜间源汇角色不同，可归纳为昼夜热源型（CI>0）、昼汇夜源型（白天CI，夜间CI>0）和昼夜热汇型（CI）。（4）天山北坡城市群独特的气候和荒漠绿洲山地地貌致使建设用地为昼汇夜源型地类，源汇角色与内地一些城市群（京津冀城市群）存在差异。
Subjects: Geosciences >> Geography submitted time 2024-05-20 Cooperative journals: 《干旱区地理》
Abstract：以黄河流域5大城市群82个城市为研究区域，选取2016—2020年中国环境监测总站发布的环境空气颗粒物（PM2.5）数据，采用空间自相关、地理探测器和地理加权回归等方法，研究PM2.5的时空分布特征和空间异质性的主要驱动影响因素。结果表明：（1）PM2.5年均值的变化大体呈倒“N”型，季均值变化呈先降后升的周期规律性的“U”型。（2）在空间分布上，形成了黄河下游>中游>上游的梯度递减空间差异格局，并有逐渐下降的趋势。（3）PM2.5演变整体上呈正自相关集聚分布，集聚类型主要为高-高集聚、低-低集聚和低-高集聚类型。（4）2016年和2020年PM2.5空间分异的自然地理因素比社会经济因素的驱动力更强，交互作用结果为双因子增强或非线性增强2种类型。（5）通过地理加权回归模型对分异探测解释力变化最大的5个因子进行拟合，5 a间各因子对5大城市群PM2.5污染的负效应不断提高，正效应呈下降趋势，空间作用方向及强度上差异显著。研究结果为黄河流域5大城市群大气污染防治和环境规制完善提供参考依据，助推黄河流域生态保护和高质量发展。
Subjects: Geosciences >> Geography submitted time 2022-02-11 Cooperative journals: 《干旱区地理》
Abstract：品质城市建设是响应生态文明、高质量发展与新型城镇化战略的重要内容。以兰西城市群30个市（县）为研究对象，以城市建成区为基本空间单元，从用地、经济、社会、生态、环保、交通、市政和形象品质8个维度进行了兰西城市群品质城市建设水平评价研究。结果表明：（1）在时序变化上，各城市的综合品质整体持续提升，品质建设处于相对中低水平；各城市的分维度品质变化复杂，存在稳定型、提升型、先降后升型、先升后降型、混合型等多种变化类型。（2）各城市综合品质在空间上呈现由双核向多核共存格局转变的特征；分维度品质差异大，分布不均衡。（3）各城市分维度品质的贡献差异显著，特色品质城市逐步形成，基本形成单维度、双维度和多维度主导型3 种类型。（4）品质城市的影响因素较多，其影响力为建成区规模>人口规模>人均GDP>城镇化率> 对外交通>地形起伏度，城市规模是兰西城市群品质城市建设的主要影响因素，城镇化率和人均 GDP为次要影响因素，自然因素影响最弱，但属于基础性作用。
Subjects: Other Disciplines >> Synthetic discipline submitted time 2023-03-28 Cooperative journals: 《中国科学院院刊》
Abstract： Beijing-Tianjin-Hebei region, Yangtze River Delta, and Guangdong-Hong Kong-Macao Greater Bay Area are the three largest urban agglomerations in China, and have been increasingly becoming the core engines of China’s economic growth. Nevertheless, rapid regional urbanization accompanying high-intensity human activities has also brought enormous social and environmental pressure in these urban agglomerations, posing a grand challenge to urban and regional sustainability. This study conducts a cross-urban agglomeration comparison of the ecological and environmental changes over the past two decades. Using a combination of remotely sensed data, in-situ monitoring data, and environmental statistic data, the changes in four dimensions are quantified, namely ecological quality, environmental quality, resource and energy use efficiency, and eco-environmental governance capacity. Further, the effectiveness of environmental policies and initiatives is evaluated at the national and urban agglomeration levels. It is found that the quality of ecological land has increased steadily since 2000, with increased provision of ecosystem services. Air quality and water quality have been substantially improved, and the use of resources and energy efficiency have been greatly improved. The pollution emissions per unit GDP have been greatly reduced. The ecological and environmental infrastructures have become increasingly available, along with gradually strengthened governance capacity on environmental protection and ecological restoration. The National 10th to 13th Five-Year Plan for Environmental Protection played a significant role in environmental protection and ecological restoration across mega urban agglomerations. The environmental challenges, of urban agglomerations faced now and in the future, are also discussed, so as to the policies and actions that need to be addressed.
Subjects: Environmental Sciences, Resource Sciences >> Basic Disciplines of Environmental Science and Technology submitted time 2020-11-20 Cooperative journals: 《干旱区地理》
Abstract：植被是全球及区域生态系统环境变化的重要指标，也是对人类社会活动有重要贡献的资源 之一。为了研究关中平原城市群不同区域植被覆盖变化对自然和人文因子的响应，以划分为三个区域的植被作为研究对象，选取2000—2017年MODIS-NDVI遥感数据，运用趋势分析、探索性空间数据分析与地理探测器等方法，从时序演进与空间分布方面研究了18 a内植被覆盖的演化及分布特征，定量分析影响植被覆盖的主导因子。遥感数据要通过投影转换、拼接、最大值合成等方法进行处理，再运用Python程序进行影像批量裁剪，将遥感数据和气象数据进行分区统计，最后对该处理数据进行讨论研究。结论表明：（1）研究期内关中平原城市群植被覆盖呈显著上升趋势，NDVI平均值增速为0.077·（10 a）－1，阶段性变化特征明显，其中2005—2007阶段和2011—2013阶段极显著增加，最大上升速率达到了0.05·a－1。（2）空间上总体呈现“南高北低”的分布特征，研究区总体得到改善；高值区主要分布在南部秦岭北坡，受气候因子的影响更大，植被覆盖增加速度缓慢，达到轻度改善水平；低 值区聚集在黄土高原边缘地区，植被增加趋势明显；中部关中平原极少部分地区植被覆盖出现了轻度退化或严重退化，以西安市及临近城市最为典型。（3）热点区主要分布在秦岭山区及关中平原中部地区，冷点区则集中于黄土高原边缘地区，植被覆盖总体以增长为主。热点区格网数量持续增多，2013年达到最大为45.07%；冷点区域数量不断减少，2017年减少到9.82%；次热点区与次冷点区主要分布在中部平原地带及北部地区，由连片分布转化为零散分布，且总量不断减少。（4）自然因素对植被覆盖的影响最为突出，其中气温和降水为影响植被覆盖的主导因子，决定力q值分别为0.955和0.931，且气温的影响大于降水的影响；人文因子影响力较为显著，GDP因子决定力q 值达到0.387。研究可为当地改善植被覆盖环境提供理论依据。
Subjects: Geosciences >> Space Physics submitted time 2016-06-16
Abstract：[摘要] 大气污染的区域性特征给大气污染有效防治提出了严峻挑战，创新大气污[摘要] 大气污染的区域性特征给大气污染有效防治提出了严峻挑战，创新大气污染联防联控体系以形成跨区域治污合力势在必行。本文基于京津冀、长三角和珠三角等10 个城市群 245 个城市 2015 年空气质量指数（AQI）日报数据，从时间序列数据的研究视角揭示了城市大气污染的空间传导网络结构特征及动态交互影响。研究发现，大气污染在城市群内部和城市群之间均具有多线程的空间传导关系且呈现出联系紧密的复杂网络结构形态。受此网络结构的影响，谋求多中心、跨区域的大气污染联防联控组织体系尤显关键；城市群大气污染主要来源于城市群内部，与此同时大气污染在城市群之间也存在较强的交互影响。基于上述结论，本文提出了全局视野下大气污染联防联控体系创新思路，即通过构建一个以城市群核心城市为中心的、“城市-城市群-地区”不同层次协同的跨区域大气污染联防联控体系，为大气污染的跨区域协同治理提供组织保障。
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Subjects: Geosciences >> Other Disciplines of Geosciences submitted time 2019-09-11 Cooperative journals: 《干旱区地理》
Abstract：基于自然与人文多重栅格数据，构建人居环境质量综合指数评价模型，分析2015年关中平原城市群人居环境的空间分异格局，并对人口分布与人居环境质量的协同性进行探讨。结果表明：(1)人居自然环境呈现出自东向西，由山地、高原向平原、谷地依次递减的空间分布格局，受地形影响最为明显，地形起伏度与人居自然环境呈负相关关系。(2)人居人文环境表现出平原低、山区高，城镇高于乡村的空间分布格局，受城市行政层级影响显著。(3)关中平原城市群人居环境综合质量指数介于0.216～0.716之间，呈现出以关中平原、汾河谷地向外梯级递减的带状空间分布格局。(4)关中平原城市群人口密度与人居环境质量空间分布显著一致，总体呈现出平原高于山地，城市高于乡村的空间分布规律，人居环境质量越高，人口密度越大，土地利用也越充分。
Subjects: Geosciences >> Geography submitted time 2019-01-11 Cooperative journals: 《干旱区地理》
Abstract：城市群是国家工业化和城镇化发展到高级阶段的产物，是高度一体化和同城化的城市群体，城市群形成发育过程是一个各城市之间由竞争变为竟合的漫长自然过程，遵循自然发展规律。天山北坡城市群位于丝绸之路经济带核心区新疆的北疆地区，是国家“十三五”期间推动建设的19个城市群之一，也是重点建设的两个边疆地区城市群和丝绸之路经济带核心区建设的唯一一个城市群。本文分析了天山北坡城市群可持续发展的战略基础、发展机遇及存在问题，提出了天山北坡城市群可持续发展的战略定位、发展目标和空间布局设想。按照“创新驱动、开放带动、内外联动、重点撬动、兵地互动”的发展思路，未来可将天山北坡城市群建成丝绸之路经济带重要的战略支撑点、全国重要的战略资源加工储运基地、新疆城镇化与经济发展的核心引擎，边疆民族团结和兵地融合发展示范区；按照城市群内部干旱脆弱的生态功能区、产业集聚的生产功能区、城镇集聚的生活功能区三大功能分区管控要求，做实一带（丝绸之路经济带城镇化发展带），做强一圈（乌昌五都市圈），做通两轴（乌拉斯台口岸-准东-南疆库尔勒轴线、克拉玛依-奎屯-南疆库车轴线），做精四区（包括奎独乌胡都市区、石沙玛都市区、克拉玛依都市区和吐鲁番都市区四大兵地融合型都市区），形成由 “一带一圈、两轴四区”组成的“夫”字型兵地融合发展空间新格局。
Subjects: Geosciences >> Geography submitted time 2024-03-15 Cooperative journals: 《干旱区地理》
Abstract：基于熵值法测度2011—2020年关中平原城市群11个地市的城市韧性综合评价指数，分析其韧性时空演化特征，并采用社会网络分析法和二次指派程序剖析其空间关联网络结构及影响因素。结果表明：（1）关中平原城市群内各城市韧性整体呈上升趋势，韧性水平呈现出从省会开始向外围降低的态势。（2）城市群韧性网络结构变得更加复杂和稳健，但地区间韧性联系呈现较强的层级性特征，也尚未完全实现互相联通的状态。（3）西安市、咸阳市、铜川市的中心性较强，能够对周边或边缘城市产生较多资源溢出，城市群“核心-边缘”结构明显。（4）地理空间邻近、经济发展水平、对外开放度、政府财政支持、科技发展水平、交通基础设施的差异均显著影响城市群韧性空间网络结构的变化。关中平原城市群可通过建设城际数字化管理与交流平台、加强交通网络建设、增加科技创新投入等途径提升城市韧性与城市间的关联性。
Subjects: Geosciences >> Geography submitted time 2024-01-29 Cooperative journals: 《干旱区地理》
Abstract：科学测度黄河流域城市群城市生态韧性的发展现状及收敛趋势，对于黄河流域城市生态保护及高质量发展具有重要意义。选取20112020年黄河流域七大城市群61个地级市面板数据，以演化韧性为研究视角，从抵抗-响应-创新等维度，构建城市生态韧性评价指标体系，利用核密度估计和自然断裂法考察城市生态韧性的空间分异，借助不同类型收敛模型解析城市生态韧性的收敛趋势。研究表明：（1） 黄河流域城市生态韧性总体均值为0.093，且呈缓慢发展趋势。（2） 城市生态韧性表现为下游城市群强、上中游城市群弱的空间格局，城市群内部形成了核心及省会城市外围及边缘城市递减的空间分布。（3） 黄河流域和各城市群内部均存在绝对收敛，其中晋中城市群收敛最快。加入控制变量后，黄河流域和各城市群内部呈现显著条件收敛趋势，且收敛速度均有提升。此外，经济发展水平、人口密度等变量对城市生态韧性收敛的影响具有显著异质性。
Subjects: Geosciences >> Geography submitted time 2023-06-28 Cooperative journals: 《干旱区地理》
Abstract：黄河流域城市群绿色发展对于全流域生态保护与绿色高质量发展至关重要。采用超效率SBM模型测度黄河流域七大城市群所辖城市20072019年的绿色发展效率，对其时空演化特征进行刻画，并分别采用引力模型和均衡函数分析七大城市群间绿色发展的关联特征和城市群内部的均衡特征。结果表明：（1）从时序特征来看，城市群的绿色发展效率以2014年为界呈现先下降后上升的变化趋势。（2）从空间分布来看，城市群所辖城市的绿色发展效率在空间格局上呈现低效率空间集聚现象。（3）从关联特征来看，不同城市群间绿色发展的关联强度存在较大差异，其关联关系主要有单向溢出关联、双向溢出关联和无关联。（4）从均衡特征来看，城市群的绿色发展效率与其均衡度之间存在负相关关系，且各城市群在绿色发展效率和均衡度的关系上主要呈现低效率-高均衡度、低效率-低均衡度和高效率-低均衡度3种类型。
Subjects: Library Science，Information Science >> Information Science submitted time 2023-04-01 Cooperative journals: 《图书情报工作》
Abstract： [Purpose/significance] Under the background of big data, the opening and sharing of government data has become an inevitable trend. As a "booster" in the process of open government data, policy plays a vital role. Research on the open government data policy of urban agglomerations in my country, and analyzing the characteristics and shortcomings of the open government data policy of urban agglomerations, can provide suggestions for improvement of the government data open policy of urban agglomerations, and promote the coordinated implementation of policies. [Method/process] The article constructed an analysis framework from the three dimensions of policy tools, policy objectives, and policy intensity. It used 23 Cheng Yu urban agglomeration government data open policies (218 detailed policy rules) as samples, and text-coded each policy. Statistically described the sample coding results. [Result/conclusion] The research results show that the structural characteristics of the open government data policy in Cheng Yu urban agglomeration are that command-type and incentive-type policy tools are used more, capacity-building and system change-type policy tools are less used; the policy objectives focused on the data level, just like opening and sharing of the government data and the application of big data, attention paid to the goal of smart government construction is not enough; the overall policy intensity is more consistent with the changes in open government data trends, but needs to be strengthened. Therefore, the open government data policies need to comprehensively use four policy tools, while coordinating the structure of policy objectives, strengthening policy, and promoting the system development of open government data.
Subjects: Other Disciplines >> Synthetic discipline submitted time 2023-03-28 Cooperative journals: 《中国科学院院刊》
Abstract： From the 14th Five-Year Plan to 2035, urban agglomerations will remain the main form of China’s urbanization. At present, the development of China’s urban agglomerations has been diversified, the development pattern of their regions is increasingly differentiated, the strategic objectives of serving the protection of land and space development are diversified, and modern governance methods require precision. Therefore, it is necessary to classify and guide the development of urban agglomerations. Aiming at the problems that the comprehensive policy to classify urban agglomerations in China are not accurate and characteristic enough, this study proposes the “four specials + comprehensive” policy. Special policy guidelines are provided for the development of urban agglomerations based on the feature of scale, development mode, space organization, and resource and environmental carrying capacity, and comprehensive policy guidelines are provided for general questions. It is recommended that future urban agglomerations be a hierarchy in China’s national spatial planning system, and each urban agglomeration should formulate a plan to determine its own policy package. In this study, three dimensions are proposed based on the national spatial development and protection strategic pattern, the national major regional strategic pattern, and the development law of the urban agglomeration. Three key points are put forward to promote the integration process of urban agglomerations and the expansion and improvement of urban agglomerations, and give play to the regional driving force of urban agglomerations. The policy framework of the four policy tools of “managing managers”, “managing resources and environment”, “managing production factors”, and “managing business and living environment” is also proposed. From the special level, the types of urban agglomerations and precise policies are organized based on the scale, development model, spatial organization, and resource and environmental carrying capacity. At the comprehensive level, the main types and policy recommendations are proposed to guide the high-quality development of urban agglomerations in China.
Subjects: Digital Publishing >> New Media submitted time 2023-10-08 Cooperative journals: 《中国传媒科技》
Abstract：本文采用社会网络分析方法,利用2010—2019年的经济联系数据,对长三角区域智慧城市群在安徽省加入前后的形式及内部特征变化进行探究。研究发现:安徽省加入后,长三角智慧城市群经济网络结构发生明显变化,经济联系差距缩小,智慧城市群紧密性、内部节点集聚性得以缓解,资源流动通达性提升,部分中小型城市发挥更积极的作用,城市群垂直化发展的差异性得以缓解。
Subjects: Other Disciplines >> Synthetic discipline submitted time 2023-03-28 Cooperative journals: 《中国科学院院刊》
Abstract： Urban agglomerations, including Beijing-Tianjin-Hebei, the Yangtze River Delta and the Pearl River Delta regions, are the large clusters both from population and economic perspectives and have the most active vitality of innovation. To be the worldclass urban agglomerations, population function regulation should highlight the roles of the carrying capacity of resources and the environment, allocation of public service resources, and the challenges of global competitions in the fields of economy and technology. We firstly review the classic theories. Then the distinct characters of population development in China’s urban agglomerations are figured out. Accordingly, the basic laws of population function regulation in urban agglomerations are put forward. In addition, the differentiated strategies are introduced to optimize the population functions in Beijing-Tianjin-Hebei, the Yangtze River Delta and the Pearl River Delta regions. Our policy implications aim to promote evolution of urban agglomerations with a more advanced and healthier process, especially during the 14th Five-Year Plan period.
Subjects: Geosciences >> Geography submitted time 2022-06-09 Cooperative journals: 《干旱区地理》
Abstract：关中平原城市群是丝绸之路经济带的重要城市群。运用耦合协调度模型定量分析了关中 平原城市群20082019年交通、产业和环境三系统耦合协调发展关系的变化规律和时空分布特 征。结果表明：（1）城市群交通、产业和环境各子系统发展评价指数差异化提升，交通系统发展增 长率远超过其他两系统，产业和环境发展与交通系统的矛盾较为突出。（2）三系统综合发展指数空 间分布单极态势明显，城间发展水平差异加剧，其中西安市和咸阳市作为极热点城市存在，其余城 市为外围受辐射冷点区。（3）城市群耦合协调发展水平整体上趋于优化提升态势，但仍处于濒临失 调状态。其中，西安市一直处于高耦合协调的单极态势，但耦合协调度的城间差距逐渐缩小，耦合 协调度等级为协调等级的城市逐渐增多，趋于集中连片式分布。研究结果可以明确关中平原城市 群交通、产业和环境三系统耦合协调发展存在的问题，为高质量发展相关政策的制定提供一定的 参考依据。
Subjects: Geosciences >> Geography submitted time 2022-02-11 Cooperative journals: 《干旱区地理》
Abstract：引用城市流强度修正传统引力模型构建经济联系矩阵，运用社会网络分析方法对2008 2018年关中平原城市群经济联系网络结构演变特征及对经济增长的影响进行分析。结果表明： （1）城市群中心性水平较弱，经济网络处于极化发展期，区域发展不平衡问题突出。（2）西安影响 力不断增大，非核心城市影响力降低，在区域内形成灯影效应。（3）凝集子群内部的集聚程度由松散向紧密发展，城市三级凝聚子群与城市所在省级行政区划分由不耦合演变为全部耦合。（4）城市群平均核心度值水平较低且逐渐升高，核心区域由西安单核心演变为西安、咸阳双核心发展结 构。（5）城市的中心性、影响力及集聚性对城市经济增长的影响存在差异。
Subjects: Management Science >> Regional Economic Management Subjects: Management Science >> Management Engineering submitted time 2021-10-11
Abstract： Building a world-class city cluster in the Guangdong-Hong Kong-Macao Greater Bay Area is not only the primary strategy of the development plan for the Guangdong-Hong Kong-Macao Greater Bay Area, but also a clear task set forth in the National 14th Five-Year Plan. The urban agglomerations in the Guangdong-Hong Kong-Macao Greater Bay Area should give full play to the agglomeration effect, build a higher-level value creation community in the global value chain, and become an important space carrier for my country to participate in global economic competition and co-operation. From the historical logic point of view, the construction of the urban agglomeration in the Guangdong-Hong Kong-Macao Greater Bay Area takes the construction of a new pattern of comprehensive opening as the fundamental direction. "An evolutionary footnote. From the perspective of theoretical logic, economic agglomeration and coordinated development are important propositions for urban agglomerations in the Guangdong-Hong Kong-Macao Greater Bay Area. We should focus on leveraging scale effects, eliminating agglomeration shadows, and enhancing knowledge spillovers to improve agglomeration economic performance. From the perspective of practical logic, centering on the theme of building urban ag-glomeration value co-creation, the three main lines of differentiated coordinated development, innovation-driven development and market integrated development can be used to promote the effect of urban agglomeration and achieve the goal of world-class urban agglomeration construction.
Peer Review Status:Awaiting Review
Subjects: Statistics >> Social Statistics submitted time 2024-05-18 Cooperative journals: 《中国科学院院刊》
Abstract： Urbanized areas are areas whose main function is to provide industrial and service products. During the 15th Five-Year Plan period, the urbanization rate of China’s population will exceed 70 percent, thus entering a long-time stage of high urbanization levels. The strategic positioning of urbanized areas will be defined as county-level administrative districts with a high concentration of scientific and technological innovation resources, new quality productivity, and new-type industrialization. In terms of strategic layout, the scope of urbanized areas will be optimized to promote the concentration of population and economy in urban agglomerations, metropolitan areas, and central cities, and to strengthen the suburbanization of mega cities, as well as the integrated development of urban and rural areas. In terms of functional upgrading, it will promote the layout of new quality productivity and new industrialization in different urbanized areas according to their comparative advantages, and strengthen the leading role of Beijing-Tianjin-Hebei, the Yangtze River Delta, the Pearl River Delta, and Chengdu-Chongqing area. In terms of spatial quality, it is necessary to promote the livability, intelligence, and resilience of cities.
Subjects: Other Disciplines >> Synthetic discipline submitted time 2023-03-28 Cooperative journals: 《中国科学院院刊》
Abstract： From the perspective of patent industry innovation chain, this paper analyzed the regional differences of the patent technology innovation efficiency and industrial technology innovation efficiency in Beijing-Tianjin-Hebei, the Yangtze River Delta and the Pearl River Delta, as well as the spatial patterns and industrial characteristics of cities with various types of technological innovation efficiency. It is found that there are significant differences in patent and industrial technology innovation efficiency among the three urban agglomerations. The patent technology innovation efficiency in the Pearl River Delta urban agglomeration is relatively high, while that in Beijing-Tianjin-Hebei and Yangtze River Delta urban agglomerations is relatively low. Cities with high industrial technological innovation efficiency show a continuous distribution around Beijing and Tianjin in Beijing-Tianjin-Hebei, a central periphery structure in the Yangtze River Delta, and a centripetal distribution in the Pearl River Delta. More than 50% of the listed high-tech enterprises in cities with high industrial technological innovation efficiency are strategic emerging industry enterprises. Most of the cities with low industrial technological innovation efficiency are located far away from the provincial capital cities and municipalities directly under the central government, and the number of listed high-tech enterprises in most cities is small. In view of the present situation of technological innovation efficiency of the three major urban agglomerations, this paper puts forward different innovation development strategies.
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