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Exploring the Element Integration of Urban and Rural“Space of Flows”in the Context of Consumption Upgrading:A Case Study of Changsi Village in Anhui Province
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作者 QIN Shuhua LI Daoyong HE Qilin 《Journal of Landscape Research》 2024年第1期48-50,54,共4页
The mobility and interaction between urban and rural areas are becoming more and more intensive,and their links and exchanges are increasingly closer due to constant flow of factors such as information,capital,personn... The mobility and interaction between urban and rural areas are becoming more and more intensive,and their links and exchanges are increasingly closer due to constant flow of factors such as information,capital,personnel and technology.In this context,the element integration of urban and rural“space of flows”can promote the integrated development of urban and rural areas,improve the consumption environment and experience,and promote the industrial upgrading and technological progress.To realize the element integration of urban and rural“space of flows”,it is necessary to explore and innovate in infrastructure construction,information technology application,industrial cooperation and cultural exchanges.Government departments,enterprises and social organizations also need to work together to give play to their respective advantages and jointly promote the process of element integration of urban and rural“space of flows”. 展开更多
关键词 Consumption upgrading space of flows urban and rural integration
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Conservation-minded Urban Green Space System Planning in the Urban-rural Integration 被引量:1
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作者 李小兰 孔强 杨柳 《Journal of Landscape Research》 2011年第10期62-65,72,共5页
Environmental and ecological problems in the urban-rural integration were analyzed, characteristics of urban green space system introduced, such as excellent landscape eco-structure, distinctive historical and humanis... Environmental and ecological problems in the urban-rural integration were analyzed, characteristics of urban green space system introduced, such as excellent landscape eco-structure, distinctive historical and humanistic features, and diversified natural landscape resources, and also challenges pointed out. Evolution, overall spatial structure and conservation concept of conservation-minded urban green space system planning were elaborated, on the basis of which the evaluation system of conservation-minded urban green space system was studied, and it was proposed that mutual relationship between impact factors of compound value and qualitative evaluation factors should be taken into consideration as a whole in evaluating conservation effects of green space system. Quantitative evaluation indexes and qualitative evaluation measures were analyzed, an objective and precise evaluation system for the conservation-minded urban green space system was established by combining qualitative and quantitative analysis to improve ecological environment during the urbanization, and fully show planning concepts of conservation-minded green space system. 展开更多
关键词 urban-rural INTEGRATION Conservation-minded urban green space SYSTEM EVALUATION SYSTEM
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NEW RURAL SPACES: THE IMPACT OF RURAL INDUSTRIALIZATION ON RURAL-URBAN TRANSITION IN CHINA 被引量:1
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作者 MIAO Chang-hong(School of Environment and Planning Henan University Kaifeng 475001, P.R. China) 《Chinese Geographical Science》 SCIE CSCD 2000年第2期131-137,共7页
Since the 1980s, rural-urban transition has been becoming one of the most important aspects in China’s fast transformation from traditional to modern modes. From the perspective of change of rural space, this paper e... Since the 1980s, rural-urban transition has been becoming one of the most important aspects in China’s fast transformation from traditional to modern modes. From the perspective of change of rural space, this paper examines the impact of rural industrialization on the rural-urban transition. After an introduction to the issue of rural-urban transition in rural-urban continuum, a historical overview of the transformations of China’s rural space in economic, social and geographical structure is presented. This is followed by an analysis of regiotal uneven development among provinces in rural industrialization and rural-urban transition. It is concluded that the fast industrialization of rural area has brought on many radical transformations of rural space in China, especially on the formation of new rural economic, social and geographical spaces and the uneven development of rural-urban trgnsition among the eastern, central and westem areas. 展开更多
关键词 rural INDUSTRIALIZATION rural-urban TRANSITION new rural space China
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A Study on the Factors Influencing the Income Gap between Urban and Rural Areas Based on State-space Model 被引量:2
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作者 Xiaofang ZOU Xueqin JIANG 《Asian Agricultural Research》 2014年第9期1-6,共6页
The increasingly widening income gap between urban and rural areas is affected by many factors. Using the stepwise regression analysis,we find that urbanization level,socio-economic development,education level,financi... The increasingly widening income gap between urban and rural areas is affected by many factors. Using the stepwise regression analysis,we find that urbanization level,socio-economic development,education level,financial development scale and financial development efficiency have the greatest impact on the income gap between urban and rural areas. By cointegration test,it is found that there is a long-term equilibrium relationship between these five variables and the income gap between urban and rural areas. We build the state-space model to research the dynamic impact of these factors on the income gap between urban and rural areas. The results show that by improving the level of urbanization,we can effectively narrow the income gap between urban and rural areas,while socio-economic development,the improvement of education level,expansion of financial development scale and financial development efficiency all significantly expand the income gap between urban and rural areas. 展开更多
关键词 INCOME GAP BETWEEN urban and rural areas State-spa
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How to Draw on the Urban-rural Space Evolution Experience of Foreign Metropolis for Xi'an?
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作者 Lufeng DUAN 《Asian Agricultural Research》 2013年第8期76-78,82,共4页
"Space" is the place where people take social and economic activities,as well as the carrier supporting any public life style and rights and acts.Urban and rural places are the two main parts that comprise t... "Space" is the place where people take social and economic activities,as well as the carrier supporting any public life style and rights and acts.Urban and rural places are the two main parts that comprise the regional economic system,and only when they are developed harmoniously can the overall economic optimization and social welfare maximization come true.On basis of analyzing the experience and mechanism of urban and rural spaces of London,New York and Tokyo 3 typical international metropolitan area and learning from their development experience,the study has proposed development strategies for the integration of urban-rural space of Xi'an City according to its current development situation. 展开更多
关键词 METROPOLITAN area urban-rural space Integration
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Study on Factors Influencing Urban-rural Dual Economic Structure of Chongqing Based on the State Space Variable Parameter Method
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作者 Xiuchuan XU Yuqing WANG Xiang HE 《Asian Agricultural Research》 2013年第11期9-13,共5页
Firstly,this paper reviews and analyzes historic background of urban-rural integration of Chongqing,and the evolution and trend of urban and rural dual economic structure.On the basis of previous researches,it selects... Firstly,this paper reviews and analyzes historic background of urban-rural integration of Chongqing,and the evolution and trend of urban and rural dual economic structure.On the basis of previous researches,it selects factors and variables influencing urban and rural dual economic structure,and establishes an econometric model.By state space Kalman filtering method,it analyzes dynamic influence of factors upon urban-rural dual economic intensity.According to empirical conclusion,it puts forward corresponding policy recommendations for promoting integrated urban and rural economic development of Chongqing. 展开更多
关键词 urban and rural dual ECONOMIC structure State SPAC
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Dynamic Mechanism for Development of Urban and Rural Spatial Integration 被引量:1
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作者 Lufeng DUAN 《Asian Agricultural Research》 2014年第6期33-36,共4页
The space is a place where human beings conduct social and economic activities,and also the carrier of any public living form and right action. Urban area and rural area are two integral parts of regional economic sys... The space is a place where human beings conduct social and economic activities,and also the carrier of any public living form and right action. Urban area and rural area are two integral parts of regional economic system. Without joint and coordinated development of urban and rural areas,it is impossible to realize global optimization of economy and maximization of social welfare. Through study of dynamic mechanism for development of urban and rural spatial integration,it is expected to understand laws,mechanism and means of urban and rural spatial structure evolution,so as to better promote sustainable development of urban and rural population,resources and environment. 展开更多
关键词 urban area rural area space THEORY
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Development Path of Urban-rural Integration 被引量:5
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作者 GAO Zheng Shandong Electric Power Corporation,Jinan 250001,China 《Asian Agricultural Research》 2012年第5期53-59,63,共8页
The urban and rural areas are regarded as two major components of the regional economic system. Only through joint balanced development of the two can we achieve overall economic optimization and social welfare maximi... The urban and rural areas are regarded as two major components of the regional economic system. Only through joint balanced development of the two can we achieve overall economic optimization and social welfare maximization. But the great social division of labor has separated urban areas from rural areas,which casts the shadow of city-oriented theory on cooperative relations between urban and rural areas. Mutual separation between urban and rural settlements and independent development trigger off a range of social problems. We must undertake guidance through rational development path of urban-rural integration,to eliminate the phenomenon of urban-rural dual structure,and promote the sustainable development of population,resources and environment in urban and rural areas as soon as possible. 展开更多
关键词 urban-rural INTEGRATION DUAL STRUCTURE DEVELOPMENT
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The Research of the Balanced Development of China's Urban-rural Spatial Integration Based on the Evolution of Regional Spatial Structure 被引量:2
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作者 DUAN Lu-feng,ZHANG Hong Institution of Industrial Economics,Xi’an Institute of Post and Telecommunications,Xi’an 710061,China 《Asian Agricultural Research》 2011年第2期81-85,90,共6页
The general law of regional spatial evolution is researched.In the process of the evolution of four stages,namely the early stage of traditional agriculture and industrialization,the middle stage of industrialization,... The general law of regional spatial evolution is researched.In the process of the evolution of four stages,namely the early stage of traditional agriculture and industrialization,the middle stage of industrialization,the later stage of industrialization and post-industrialization,the types of space are homogenized space,polarized space,pole-axis space and integrated space respectively;the choosing of the spatial location is influenced by economy,society and environment,and the spatial structure extends along with three-dimensional space.Based on the fact that China's urban-rural spatial structure evolution develops rapidly,and the outstanding characteristics of dual structure becomes the main obstacle to urban-rural balanced development,the thesis poses the countermeasures of China's urban-rural spatial integrated balanced development.It points out that the healthy development of socio-economy is the external environment of realizing urban-rural spatial integration;the urban-rural coordinated planning is the prerequisite of realizing urban-rural spatial integration;fulfilling the governmental function is the key to realizing urban-rural spatial integration;promoting agricultural industrialization is the approach to realizing urban-rural spatial integration;perfecting social security system is the basis of realizing urban-rural spatial integration. 展开更多
关键词 space urban-rural EVOLUTION INTEGRATION Coordinati
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Rural Residential Space Differentiation and Social Ecology
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作者 杨恢武 《Journal of Landscape Research》 2012年第2期47-50,共4页
After reviewing the rural development in China since the establishment of new China,the paper has pointed out that the promotion of urbanization and construction of new socialist countryside have led to the migration ... After reviewing the rural development in China since the establishment of new China,the paper has pointed out that the promotion of urbanization and construction of new socialist countryside have led to the migration of a number of rural people,the damage of traditional communities,rural social hierarchy and social separation.With the movement of people,a large area of rural lands have been abandoned and land resources been wasted.In view of these problems,it is considered that it should not adopt urban construction mode blindly in rural planning,but reconstruct rural social ecology and introduce non physical pattern planning based on rural development and villagers'status,providing a solid basis for physical pattern planning,so as to guide urban-rural coordinated development. 展开更多
关键词 COUNTRYSIDE RESIDENTIAL space SOCIAL ECOLOGY urban-rural PLANNING
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城乡空间高质量融合发展路径研究——以关中平原城市群为例 被引量:1
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作者 张中华 李旭升 《技术经济与管理研究》 北大核心 2024年第1期147-152,共6页
深入实施区域协调发展和新型城镇化战略是基于城乡社会发展实际,推动我国全面高质量发展的重要抓手。关中平原城市群作为我国西部地区经济社会发展的重要空间载体,其城镇空间、乡村空间和区域经济发展具有一定的地域特征和代表性。基于... 深入实施区域协调发展和新型城镇化战略是基于城乡社会发展实际,推动我国全面高质量发展的重要抓手。关中平原城市群作为我国西部地区经济社会发展的重要空间载体,其城镇空间、乡村空间和区域经济发展具有一定的地域特征和代表性。基于新时代背景,构建城乡空间高质量融合发展内涵和发展模式的理论框架。通过对关中平原城市群城乡发展核心问题研判,提出以“中心城镇拉动”“乡村崛起推动”等为代表的城乡融合发展动力机制,从优化城乡空间格局、构建城乡产业体系、推进城乡基础设施互通、统筹城乡公共服务共享、健全城乡要素流动保障等方面探索关中城市群适宜性发展路径,助推关中平原城市群城乡空间高质量融合发展。 展开更多
关键词 关中城市群 城乡空间 城乡融合 高质量发展
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乡村文化振兴与环境设计研究--以乡村文化空间设计为视角 被引量:2
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作者 习丽 屈铭慧 尹梦迪 《鞋类工艺与设计》 2024年第9期106-108,共3页
文化是乡村的精神传承,文化振兴是实现乡村振兴的灵魂所在。环境设计作为连接人与空间的桥梁,其对乡村文化振兴的作用不言而喻。本文旨在探究乡村文化振兴与环境设计之间的相互作用,并以乡村文化空间为例,分析乡村文化传承与发展,发挥... 文化是乡村的精神传承,文化振兴是实现乡村振兴的灵魂所在。环境设计作为连接人与空间的桥梁,其对乡村文化振兴的作用不言而喻。本文旨在探究乡村文化振兴与环境设计之间的相互作用,并以乡村文化空间为例,分析乡村文化传承与发展,发挥环境设计的学科优势,充分探讨乡村文化振兴的价值意义。 展开更多
关键词 乡村文化振兴 文化空间 城乡融合
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基于生活圈的城乡一体化防灾空间构建方法研究
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作者 王志涛 王影 +2 位作者 倪乐 郭小东 杨雅婷 《灾害学》 CSCD 北大核心 2024年第4期8-14,32,共8页
为推进城市与乡村防灾减灾救灾能力同步提升,以生活圈理论为指导构建城乡一体的防灾空间布局,推动城乡防灾设施配置一体化发展。首先,该文按照中灾正常、大灾可控、巨灾可救的目标,明确应对不同水准灾害影响的防灾生活圈层级对应关系;其... 为推进城市与乡村防灾减灾救灾能力同步提升,以生活圈理论为指导构建城乡一体的防灾空间布局,推动城乡防灾设施配置一体化发展。首先,该文按照中灾正常、大灾可控、巨灾可救的目标,明确应对不同水准灾害影响的防灾生活圈层级对应关系;其次,从“常态中心性”和“灾害危险性”两个维度出发建立各村镇单元的防灾重要性评价指标体系,由此确定城乡各级防灾中心节点。在此基础上,利用防灾中心地、服务半径法和泰森多边形等方法构建“基础—拓展—综合”三级防灾生活圈,以此为依托并结合不同圈域城乡防灾目标要求,按照分类分级和平灾结合原则对各级生活圈进行防灾设施一体化配置,并以某县为例进行实证分析,为我国城乡防灾减灾一体化建设提供参考。 展开更多
关键词 生活圈 防灾规划 城乡一体化 防灾空间 中心性评价
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响应规划体系变革的“理工融合型”规划创新人才培养模式
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作者 朱佩娟 周国华 马恩朴 《高教学刊》 2024年第24期53-58,共6页
国土空间规划体系重构背景下对规划类人才培养提出新要求,人才培养模式创新亟需探索。该研究基于我国人文地理与城乡规划专业发展与研究现状,针对人才培养理念与新工科人才培养要求不协调、传统专业能力培养体系与智能时代技术发展需求... 国土空间规划体系重构背景下对规划类人才培养提出新要求,人才培养模式创新亟需探索。该研究基于我国人文地理与城乡规划专业发展与研究现状,针对人才培养理念与新工科人才培养要求不协调、传统专业能力培养体系与智能时代技术发展需求不协调和传统课程体系与国土空间规划综合创新性需求不协调等现实挑战,结合湖南师范大学的具体实践,提出以“学生中心,理工融合”为核心建设理念,围绕“专业素质+专业知识+专业技能”三大能力构建目标,通过课程模块融合化、能力培养层级化、产学研赛一体化,校社政企协同化途径,着力在课程体系、能力培养体系、教学路径和培养建构环境等方面进行改革和创新,构建“1344”响应规划体系变革的“理工融合型”规划创新人才培养模式。 展开更多
关键词 国土空间规划 理工融合 人才培养模式 创新与实践 人文地理与城乡规划专业
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乡村秩序的空间基础:一个人地关系的分析框架
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作者 杜鹏 《华南农业大学学报(社会科学版)》 北大核心 2024年第5期107-117,共11页
村落空间不仅是村庄社会关系运作的背景,而且定义了乡村秩序再生产的底层架构。人地关系是村落空间的基础,且在农民土地利用实践中推动村落空间的功能分化,并逐渐形成生产空间与生活空间的分化与融合、公共空间与私人空间的分化与互通... 村落空间不仅是村庄社会关系运作的背景,而且定义了乡村秩序再生产的底层架构。人地关系是村落空间的基础,且在农民土地利用实践中推动村落空间的功能分化,并逐渐形成生产空间与生活空间的分化与融合、公共空间与私人空间的分化与互通。村落空间兼有自然底色与社会面向,集体土地制度调控维系了村落空间结构的有机整合。城市化进程推动村落空间转型,生产空间与生活空间的分离、公共空间与私人空间的断裂可能导致村落空间的秩序紊乱。为此,须将人地关系纳入集体土地制度调控,在农民流动的社会场景中建构富有包容性和适应性的村落空间秩序。 展开更多
关键词 村落空间 乡村秩序 人地关系 城市化 集体制度
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我国老年人居服务设施体系研究进展与思考
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作者 黄勇 张晗 左茜 《规划师》 北大核心 2024年第5期26-33,共8页
在我国积极应对人口老龄化和新型城镇化发展转型的双重背景下,针对老年人的服务设施体系建设成为老年人居环境“以人为本”核心价值的重要体现。为揭示我国城市老年人居服务设施资源总量足配与设施空间错配矛盾的底层逻辑和作用机制,首... 在我国积极应对人口老龄化和新型城镇化发展转型的双重背景下,针对老年人的服务设施体系建设成为老年人居环境“以人为本”核心价值的重要体现。为揭示我国城市老年人居服务设施资源总量足配与设施空间错配矛盾的底层逻辑和作用机制,首先从养老服务供给模式、老年人行为特征、老年人居空间3个方面梳理老年人居服务理论基础的转变,其次总结我国老年人居服务设施规划建设的适老化、均等化、体系化3种实践响应与面临的困境。在此基础上,提出构建适应我国国情的老年人居服务设施体系“人—空间—服务”理论框架,以期在国土空间规划体系下,为老年友好的人居环境和设施支持体系提供学理支撑。 展开更多
关键词 城乡规划 养老服务设施 人居环境 人—空间—服务
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中国式现代化进程中集市助推城乡融合发展问题研究——基于山东阳信集的考察
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作者 马海龙 赵梦雪 《湖北民族大学学报(哲学社会科学版)》 北大核心 2024年第2期89-102,共14页
中国式现代化的宗旨是实现全体人民共同富裕,其基本路径之一是推动城乡深度融合发展。位于鲁西北地区的阳信集有着悠久的历史,在推动当地城乡融合发展过程中发挥了重要作用。基于阳信集的案例,借助社会空间视角,从过程性、关系性、要素... 中国式现代化的宗旨是实现全体人民共同富裕,其基本路径之一是推动城乡深度融合发展。位于鲁西北地区的阳信集有着悠久的历史,在推动当地城乡融合发展过程中发挥了重要作用。基于阳信集的案例,借助社会空间视角,从过程性、关系性、要素性三方面分析集市助推城乡融合发展的过程是一种新的探索。从过程性的维度来看,集市是实现城乡空间结构重组与整合、控制与赋权的关键场域;从关系性的维度来看,集市是城乡居民进行社会互动与交往的公共生活空间;从要素性的维度来看,集市是推动劳动力、资本、信息等城乡生产要素自由流动和城乡基本公共服务一体化的交换空间。在中国式现代化发展进程中,集市已成为推动城乡融合发展的重要空间载体。 展开更多
关键词 中国式现代化 集市 城乡融合发展 社会空间
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城乡绿色空间价值评估内涵、路径及特征梳理研究
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作者 沈葆菊 李昊 付胜刚 《园林》 2024年第7期81-88,共8页
城乡绿色空间是反映人居环境品质的重要空间载体。进入存量阶段,价值评估是保障城乡绿色空间“精准优化”的首要工作。既有研究多以技术应用为主,重实操,呈碎片状,缺乏系统整理。以城乡绿色空间和人的需求之间的价值匹配为切入点,对以... 城乡绿色空间是反映人居环境品质的重要空间载体。进入存量阶段,价值评估是保障城乡绿色空间“精准优化”的首要工作。既有研究多以技术应用为主,重实操,呈碎片状,缺乏系统整理。以城乡绿色空间和人的需求之间的价值匹配为切入点,对以多学科交叉研究为基础的城乡绿色空间价值评估研究进行“理论层—实践层—决策层”的内涵整理;系统梳理了城乡绿色空间评估—反馈路径,对“生活需求—生产需求—福祉需求”三个阶段的城乡绿色空间评估研究体系进行了“价值需求—评估指标”的特征归纳以及涵盖“尺度—维度—标尺”的研究坐标系建构。为相关研究者、实践者与决策者在具体绿色空间评估工作中提供指标选取和参照依据。 展开更多
关键词 城乡绿色空间 价值需求 评估内涵 需求层次 特征归纳
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我国城乡收入分配差距空间格局及影响因素研究——基于省际面板数据的空间杜宾模型
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作者 陈燕赟 杨林燕 《龙岩学院学报》 2024年第4期88-94,共7页
基于空间杜宾模型,利用我国31个省(自治区、直辖市)1978—2022年的面板数据,研究省际城乡收入分配差距空间格局及影响因素。结果显示,我国省际城乡收入分配差距存在空间上的依赖性和异质性。由于经济发展突出的二元性与“晋升锦标赛”... 基于空间杜宾模型,利用我国31个省(自治区、直辖市)1978—2022年的面板数据,研究省际城乡收入分配差距空间格局及影响因素。结果显示,我国省际城乡收入分配差距存在空间上的依赖性和异质性。由于经济发展突出的二元性与“晋升锦标赛”下激烈的区域竞争环境,产业就业结构与城乡结构对邻近地区有显著的短期空间溢出效应。各地区须优化产业布局、加强区域协作、深化制度改革、促进乡村产业振兴,通过就业承载力的全面提升,缩小城乡收入分配差距。 展开更多
关键词 城乡收入分配差距 空间格局 空间杜宾模型
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不同城市绿地类型碳源/汇的城乡梯度格局--以杭州市为例 被引量:1
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作者 孙洋洋 沈泽琦 +4 位作者 黄乐妍 胡金丽 赵馨玉 吴珏莹 胡广 《生态学报》 CAS CSCD 北大核心 2024年第3期930-943,共14页
探究城市化对绿地空间碳源/汇的空间分布格局的影响,对评估城市生态系统的碳足迹和制定相应的碳收支管理措施具有重要意义。以净生态系统生产力(NEP)做为碳源/汇的反映指标,基于净初级生产力和土壤呼吸估算杭州市主城区绿地碳源/汇的空... 探究城市化对绿地空间碳源/汇的空间分布格局的影响,对评估城市生态系统的碳足迹和制定相应的碳收支管理措施具有重要意义。以净生态系统生产力(NEP)做为碳源/汇的反映指标,基于净初级生产力和土壤呼吸估算杭州市主城区绿地碳源/汇的空间分布格局,关注城乡梯度对不同绿地类型碳源/汇水平的作用。基于净初级生产力和土壤呼吸数据综合获得绿地空间NEP,通过土地利用数据和Fragstats软件进行景观格局分析,采用多元线性回归模型和逐步回归模型筛选影响NEP的景观、植被和气象因子,最后利用广义加性模型探讨NEP与各因子之间的关系。此外,分别比较了相同统计过程在不同城乡梯度和不同绿地类型之间的模型差异。结果表明:杭州市绿地空间NEP分布及其影响因子存在显著的城乡梯度与绿地类型差异。2019—2022年杭州市主城区绿地空间,整体表现为碳源,年均NEP为-0.277 kg C m^(-2) a^(-1);其中表现为碳汇的绿地主要分布在杭州市主城区的西部,而碳源绿地主要分布在中部和东部。整体绿地空间的NEP大小与绿地斑块面积、乔木盖度和灌木盖度呈正相关,与灌木物种丰富度和气温呈负相关。NEP随城区、城郊结合部、郊区的城乡梯度逐步增强;城区NEP与乔木盖度呈正相关,与景观多样性和气温呈负相关;城郊结合部NEP与乔木物种丰富度和灌木盖度呈正相关,与绿地斑块密度和气温呈负相关;郊区NEP则与聚集度指数、乔木盖度和灌木盖度呈正相关。公园、农田、自然植被的NEP依次增大并受到不同因素的调控。公园NEP与聚集度指数、乔木盖度和灌木盖度呈正相关,与景观分割指数、灌木物种丰富度和气温呈负相关;农田NEP与聚集度指数和灌木盖度呈正相关,与气温呈负相关;而自然植被NEP则与乔木盖度呈正相关,与景观多样性指数和气温呈负相关。研究进一步揭示了城市化对绿地空间碳源/汇的影响,为城乡碳收支的差异化管理提供了一定的理论和数据支持。 展开更多
关键词 绿地空间 净生态系统生产力 城乡梯度 净初级生产力 广义加性模型
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