作为人们日常生活和休闲娱乐活动的重要场所,城市公园绿地活力的提升对优化公共空间布局、提高居民生活质量及推动城市可持续发展具有重要意义。当前,其已成为城市空间研究的热点议题,研究成果数量和社会关注度持续增长。本研究首先,基...作为人们日常生活和休闲娱乐活动的重要场所,城市公园绿地活力的提升对优化公共空间布局、提高居民生活质量及推动城市可持续发展具有重要意义。当前,其已成为城市空间研究的热点议题,研究成果数量和社会关注度持续增长。本研究首先,基于CNKI(中国知网)和WOS(Web of Science)数据库,使用CiteSpace知识图谱工具,系统分析了城市公园绿地活力研究的演进脉络;其次,根据国家政策导向和文献计量法分析了突变节点,并将其分为3个阶段:初步理论探索阶段(2012年以前)、中期实证阶段(2012—2019年)和信息深化阶段(2019年至今);再次,总结了各阶段的研究重点与发展方向,并识别了当前研究中存在的不足;最后,提出了未来深化路径。展开更多
With the continuous development of society,the urban space has already met the basic functional needs of the people.As the crystallization of the ideology of mankind and the social development,the urban space exerts a...With the continuous development of society,the urban space has already met the basic functional needs of the people.As the crystallization of the ideology of mankind and the social development,the urban space exerts an effect on the people on both the material level and the spiritual level.The urban space inherits the urban culture and influences people’s feelings,and the proper narrative space can meet the increasing emotional needs.This paper analyzes the three formative factors of the urban narrative space—the temporal factor,the spatial factor and the diversified event factor,showing the readers a clearer narrative space and laying foundation for the further study on narrative space theory.展开更多
In the present research, a factorial ecological approach using factor analysis was employed to evaluate the dimensionality of the urban social structure of the twin city: Ramallah and Al-Bireh, West Bank, the Palestin...In the present research, a factorial ecological approach using factor analysis was employed to evaluate the dimensionality of the urban social structure of the twin city: Ramallah and Al-Bireh, West Bank, the Palestinian Authority. Through factor analysis, the 41 variables were reduced to four factors with an eigenvalue > 1.0. These factors explain 77.07 percent of the total variables used in the study. Factor I contributes 28.419% of the total variance proportion of input variables, labeled as “family, housing, and public spaces factor”. Factor II accounts for 19.57% of the variance proportion, designated as” housing and urban public spaces”. Factor III is strongly correlated with variables referring to the characteristics of the head of the family, and the availability of public spaces, and thus, is designated as “head of the family and public spaces”. It explains 16.68% of the total variance. Finally, factor IV explains 12.406% of variance proportion, and is strongly associated with variables pertaining to a lack of public social spaces. Consequently, factor IV is termed “lack of public spaces”. The spatial distribution of factor scores related to factors I to IV was mapped using Arc GIS in order to analyze the spatial patterns of the recognized four factors. It is worth noting the factor IV, which refers to the lack of urban social space and, urban public space, which persists in the twin city, and will continue to persist in the future. The lack of urban open space and public social spaces is closely connected to migration, emerged housing pattern, and family status dimensions focused on factors I to III, continuous confiscation of the Palestinian lands, and the construction of Israeli settlements. Currently, the twin city is extremely overcrowded with stone/concrete buildings at the expense of public space which has declined continuously over the last three decades. Nevertheless, the analyzed spatial pattern of factor scores indicated the homogeneous character of the urban society of the twin city. Based on the urban eco-logical models which seek to characterize the Western, non-Western, Israeli, and Arab-oil producing (e.g., Kuwait) urban structures, it is difficult to elaborate a specific Palestinian urban ecological model with reference to the models developed elsewhere.展开更多
Let M be a σ-finite von Neumann algebra equipped with a normal faithful state φ, and let A be a maximal subdiagonal algebra of M. We proved a Szeg type factorization theorem for the Haagerup noncommutative H;-spaces.
Studying the agricultural spatial distribution characteristics of Jianghan Plain from 2000 to 2018 and its spatial-temporal transformation with ecological space and urban space is of great significance for optimizing ...Studying the agricultural spatial distribution characteristics of Jianghan Plain from 2000 to 2018 and its spatial-temporal transformation with ecological space and urban space is of great significance for optimizing the spatial structure of the country, enhancing the supply capacity of agricultural products, and ensuring food security. The research results show that during the period from 2000 to 2018, the agricultural spatial concentration in the area along the “Xiaogan-Jingzhou” link was relatively high, and the areas with large declines were mainly distributed in the flat areas between the Yangtze River and Han River;the space is continuously reduced by the occupation of ecological space and urban space, and ecological space and urban space have been improved respectively;agricultural space has been transformed into ecological space, and the largest urban space has been transformed. Ecological space has been transformed into agricultural space and urban space. Less urban space has been transformed into agricultural space and ecological space.展开更多
We consider plus-operators in Krein spaces and generated operator linear fractional relations of the following form: . We study some special type of factorization for plus-operators T, among them the following one: T ...We consider plus-operators in Krein spaces and generated operator linear fractional relations of the following form: . We study some special type of factorization for plus-operators T, among them the following one: T = BU, where B is a lower triangular plus-operator, U is a J-unitary operator. We apply the above factorization to the study of basical properties of relations (1), in particular, convexity and compactness of their images with respect to the weak operator topology. Obtained results we apply to the known Koenigs embedding problem, the Krein-Phillips problem of existing of invariant semidefinite subspaces for some families of plus-operators and to some other fields.展开更多
城市绿地的疗愈价值历来为学术界热衷探讨,近期“公园20分钟效应”作为公众关注的减压新方式,更强化了这一研究热点。但在中观视角下诸如不同城市绿地特征的疗愈效益及其因果机制的探讨,仍缺乏相关方法总结及理论概述。为此,通过Web of ...城市绿地的疗愈价值历来为学术界热衷探讨,近期“公园20分钟效应”作为公众关注的减压新方式,更强化了这一研究热点。但在中观视角下诸如不同城市绿地特征的疗愈效益及其因果机制的探讨,仍缺乏相关方法总结及理论概述。为此,通过Web of Science和CiteSpace对2000年至今348篇相关文献进行计量分析。结果表明:(1)研究文献数量整体为逐年递增,2022年出现增长峰值,中美英学者贡献约50%的研究文献;(2)研究主题跨学科、多元化特征显著,近三年研究焦点集中于身体活动与心理健康间的互动关系;(3)城市绿地恢复性机制研究涵盖五大方向:分人群效益、绿地环境属性、中介变量影响、恢复评估机制、干预疗愈实践。旨在拓宽既有学术视野,厘清“绿地”到“恢复”中的内在机理与关键影响因子,为城市规划和政策提供指导。展开更多
After the understanding of the concept and characteristics of waterfront architectural space, by taking library, archive, and science and technology museum in Fuqing City for example, the paper had pointed out design ...After the understanding of the concept and characteristics of waterfront architectural space, by taking library, archive, and science and technology museum in Fuqing City for example, the paper had pointed out design techniques and features of their natural geological space, planning structure space, traditional courtyard space and architectural indoor space. It had illustrated their structure of "one center and three axes" in detail. Environmental factor had been regarded in plane planning layout. Semi-enclosed space of "cultural square", sequential space of "open courtyard", and well-spaced space of "vertical ecological courtyard" had been created. Based on these spaces, courtyard and garden environments for reading, rest, leisure and communication had been constructed. It was hoped to inspire design idea of waterfront architectures, so as to create waterfront architectures with times spirit and national feature.展开更多
为探析港口货物吞吐量及其影响因素的时空差异,基于省域空间视角对我国11个沿海省级行政区2002—2022年间港口货物吞吐量的空间格局进行空间分析,利用地理探测器和时空地理加权回归(geographically and temporally weighted regression,...为探析港口货物吞吐量及其影响因素的时空差异,基于省域空间视角对我国11个沿海省级行政区2002—2022年间港口货物吞吐量的空间格局进行空间分析,利用地理探测器和时空地理加权回归(geographically and temporally weighted regression,GTWR)模型展开实证研究,剖析港口货物吞吐量的主导驱动因素及其时空演变特征。结果显示:(1)就影响沿海港口发展的因素而言,固定资产投资额是引起港口货物吞吐量发生变化的主要驱动因素,而铁路货运量的影响程度相对较低,并且影响因素间的交互作用对港口发展的影响更为显著;(2)就各影响因素的动态变化而言,固定资产投资额的影响逐年下降,进出口总额的影响维持较高水平,铁路货运量的影响则表现为先强后弱,第三产业占GDP比重在不同时期的影响强度波动较大;(3)在同一时期,各因素在不同省级行政区的影响程度存在显著差异,部分因素对特定区域的影响尤为突出。各因素在不同时期对同一区域的影响程度不尽相同,其空间异质性格局随着年份的推进而发生变化。展开更多
文摘作为人们日常生活和休闲娱乐活动的重要场所,城市公园绿地活力的提升对优化公共空间布局、提高居民生活质量及推动城市可持续发展具有重要意义。当前,其已成为城市空间研究的热点议题,研究成果数量和社会关注度持续增长。本研究首先,基于CNKI(中国知网)和WOS(Web of Science)数据库,使用CiteSpace知识图谱工具,系统分析了城市公园绿地活力研究的演进脉络;其次,根据国家政策导向和文献计量法分析了突变节点,并将其分为3个阶段:初步理论探索阶段(2012年以前)、中期实证阶段(2012—2019年)和信息深化阶段(2019年至今);再次,总结了各阶段的研究重点与发展方向,并识别了当前研究中存在的不足;最后,提出了未来深化路径。
基金the staged achievement of the national natural sciences funded program-Quantitative Study on the Historical Urban Narrative Environment System(51178465)
文摘With the continuous development of society,the urban space has already met the basic functional needs of the people.As the crystallization of the ideology of mankind and the social development,the urban space exerts an effect on the people on both the material level and the spiritual level.The urban space inherits the urban culture and influences people’s feelings,and the proper narrative space can meet the increasing emotional needs.This paper analyzes the three formative factors of the urban narrative space—the temporal factor,the spatial factor and the diversified event factor,showing the readers a clearer narrative space and laying foundation for the further study on narrative space theory.
文摘In the present research, a factorial ecological approach using factor analysis was employed to evaluate the dimensionality of the urban social structure of the twin city: Ramallah and Al-Bireh, West Bank, the Palestinian Authority. Through factor analysis, the 41 variables were reduced to four factors with an eigenvalue > 1.0. These factors explain 77.07 percent of the total variables used in the study. Factor I contributes 28.419% of the total variance proportion of input variables, labeled as “family, housing, and public spaces factor”. Factor II accounts for 19.57% of the variance proportion, designated as” housing and urban public spaces”. Factor III is strongly correlated with variables referring to the characteristics of the head of the family, and the availability of public spaces, and thus, is designated as “head of the family and public spaces”. It explains 16.68% of the total variance. Finally, factor IV explains 12.406% of variance proportion, and is strongly associated with variables pertaining to a lack of public social spaces. Consequently, factor IV is termed “lack of public spaces”. The spatial distribution of factor scores related to factors I to IV was mapped using Arc GIS in order to analyze the spatial patterns of the recognized four factors. It is worth noting the factor IV, which refers to the lack of urban social space and, urban public space, which persists in the twin city, and will continue to persist in the future. The lack of urban open space and public social spaces is closely connected to migration, emerged housing pattern, and family status dimensions focused on factors I to III, continuous confiscation of the Palestinian lands, and the construction of Israeli settlements. Currently, the twin city is extremely overcrowded with stone/concrete buildings at the expense of public space which has declined continuously over the last three decades. Nevertheless, the analyzed spatial pattern of factor scores indicated the homogeneous character of the urban society of the twin city. Based on the urban eco-logical models which seek to characterize the Western, non-Western, Israeli, and Arab-oil producing (e.g., Kuwait) urban structures, it is difficult to elaborate a specific Palestinian urban ecological model with reference to the models developed elsewhere.
文摘Let M be a σ-finite von Neumann algebra equipped with a normal faithful state φ, and let A be a maximal subdiagonal algebra of M. We proved a Szeg type factorization theorem for the Haagerup noncommutative H;-spaces.
文摘Studying the agricultural spatial distribution characteristics of Jianghan Plain from 2000 to 2018 and its spatial-temporal transformation with ecological space and urban space is of great significance for optimizing the spatial structure of the country, enhancing the supply capacity of agricultural products, and ensuring food security. The research results show that during the period from 2000 to 2018, the agricultural spatial concentration in the area along the “Xiaogan-Jingzhou” link was relatively high, and the areas with large declines were mainly distributed in the flat areas between the Yangtze River and Han River;the space is continuously reduced by the occupation of ecological space and urban space, and ecological space and urban space have been improved respectively;agricultural space has been transformed into ecological space, and the largest urban space has been transformed. Ecological space has been transformed into agricultural space and urban space. Less urban space has been transformed into agricultural space and ecological space.
文摘We consider plus-operators in Krein spaces and generated operator linear fractional relations of the following form: . We study some special type of factorization for plus-operators T, among them the following one: T = BU, where B is a lower triangular plus-operator, U is a J-unitary operator. We apply the above factorization to the study of basical properties of relations (1), in particular, convexity and compactness of their images with respect to the weak operator topology. Obtained results we apply to the known Koenigs embedding problem, the Krein-Phillips problem of existing of invariant semidefinite subspaces for some families of plus-operators and to some other fields.
文摘城市绿地的疗愈价值历来为学术界热衷探讨,近期“公园20分钟效应”作为公众关注的减压新方式,更强化了这一研究热点。但在中观视角下诸如不同城市绿地特征的疗愈效益及其因果机制的探讨,仍缺乏相关方法总结及理论概述。为此,通过Web of Science和CiteSpace对2000年至今348篇相关文献进行计量分析。结果表明:(1)研究文献数量整体为逐年递增,2022年出现增长峰值,中美英学者贡献约50%的研究文献;(2)研究主题跨学科、多元化特征显著,近三年研究焦点集中于身体活动与心理健康间的互动关系;(3)城市绿地恢复性机制研究涵盖五大方向:分人群效益、绿地环境属性、中介变量影响、恢复评估机制、干预疗愈实践。旨在拓宽既有学术视野,厘清“绿地”到“恢复”中的内在机理与关键影响因子,为城市规划和政策提供指导。
基金Supported by Scientific Research Development Fund of Fujian University of Technology(GY-Z09094)~~
文摘After the understanding of the concept and characteristics of waterfront architectural space, by taking library, archive, and science and technology museum in Fuqing City for example, the paper had pointed out design techniques and features of their natural geological space, planning structure space, traditional courtyard space and architectural indoor space. It had illustrated their structure of "one center and three axes" in detail. Environmental factor had been regarded in plane planning layout. Semi-enclosed space of "cultural square", sequential space of "open courtyard", and well-spaced space of "vertical ecological courtyard" had been created. Based on these spaces, courtyard and garden environments for reading, rest, leisure and communication had been constructed. It was hoped to inspire design idea of waterfront architectures, so as to create waterfront architectures with times spirit and national feature.
文摘为探析港口货物吞吐量及其影响因素的时空差异,基于省域空间视角对我国11个沿海省级行政区2002—2022年间港口货物吞吐量的空间格局进行空间分析,利用地理探测器和时空地理加权回归(geographically and temporally weighted regression,GTWR)模型展开实证研究,剖析港口货物吞吐量的主导驱动因素及其时空演变特征。结果显示:(1)就影响沿海港口发展的因素而言,固定资产投资额是引起港口货物吞吐量发生变化的主要驱动因素,而铁路货运量的影响程度相对较低,并且影响因素间的交互作用对港口发展的影响更为显著;(2)就各影响因素的动态变化而言,固定资产投资额的影响逐年下降,进出口总额的影响维持较高水平,铁路货运量的影响则表现为先强后弱,第三产业占GDP比重在不同时期的影响强度波动较大;(3)在同一时期,各因素在不同省级行政区的影响程度存在显著差异,部分因素对特定区域的影响尤为突出。各因素在不同时期对同一区域的影响程度不尽相同,其空间异质性格局随着年份的推进而发生变化。
