This study reflects on the impact that the neighborhoods’in-between spaces have on:spatial perception,social interaction,and security.These sites,characterized by their abandonment and deterioration,can also be seen ...This study reflects on the impact that the neighborhoods’in-between spaces have on:spatial perception,social interaction,and security.These sites,characterized by their abandonment and deterioration,can also be seen as crucial spaces of opportunity for cities,in the architectural,urban and landscape research.This paper aims to analyze the sociospatial relationships in the neighborhoods’in-between spaces and examine the impact of inbetween space configuration on urban habitability.The investigation draws on a survey of perception to residents about the requirements for a suitable social interaction in these spaces.This study was developed in a neighborhood in the city periphery,characterized by their social dynamics and location in a nature conservation area.The findings indicate that the appropriation process,activities,and collective practices are dependent on the spatial legibility,in this case when this increases,gives rise to improve the habitability and the rehabilitation of the in-between space.Furthermore,the lack of design on in-between spaces substantially affects the use of these spaces and the social interaction among residents.展开更多
With the advancement of the transformation,the contradiction between the residents’demand for a better living environment and the convenience of living in the settlements comes to the fore.Effective identification,or...With the advancement of the transformation,the contradiction between the residents’demand for a better living environment and the convenience of living in the settlements comes to the fore.Effective identification,organic integration,timely adoption,and correct decision-making for the transformation of old neighborhoods are pressing issues in the transformation of old neighborhoods.Therefore,this paper takes the green building evaluation standards of various countries as the research basis and support for the construction of the transformation strategy of old neighborhoods.Through the collection and comparative analysis of the indicators of green building evaluation standards,the index system of transformation is formed,and it also provides a certain foundation for the subsequent related research.展开更多
The rise in online home delivery services(OHDS)has had a significant impact on how urban services are supplied and used in recent years.Studies on the spatial accessibility of OHDS are emerging,but few is known about ...The rise in online home delivery services(OHDS)has had a significant impact on how urban services are supplied and used in recent years.Studies on the spatial accessibility of OHDS are emerging,but few is known about the temporal dimension of OHDS accessibility as well as the geographic and socioeconomic differences in the spatiotemporal accessibility of OHDS.This study measures the spatiotemporal accessibility of four types of OHDS,namely leisure,fresh and convenient,medical,and catering services.The geographic and socioeconomic disparities in the spatiotemporal accessibility of these four types of OHDS are then identified using spatial statistical methods and the Kruskal-Wallis test(K-W test).The case study in Nanjing,China,suggests that:1)spatiotemporal accessibility better reflects the temporal variation of OHDS accessibility and avoids overestimation of OHDS accessibility when only considering its spatial dimension.2)The spatiotemporal accessibility of OHDS varies geographically and socioeconomically.Neighborhoods located in the main city or neighborhoods with higher housing prices,higher population density,and higher point of interest(POI)mix have better OHDS spatiotemporal accessibility.Our study contributes to the understanding of OHDS accessibility from a spatiotemporal perspective,and the empirical insights can assist policymakers in creating intervention plans that take into account variations in OHDS spatiotemporal accessibility.展开更多
Cities in deltas are vulnerable to climate change, especially their unembanked neighborhoods that are not protected by dikes. Rising sea levels and extreme water levels in the rivers can lead to the flooding of these ...Cities in deltas are vulnerable to climate change, especially their unembanked neighborhoods that are not protected by dikes. Rising sea levels and extreme water levels in the rivers can lead to the flooding of these urban areas. The Netherlands has a long history in water management. However, building dikes and the elevation of land are traditionally treated as rather stand-alone measures. Attention is rarely paid to the surrounding area, let alone to the complex context of cities and certainly not to disadvantaged neighborhoods. Yet, inner-city area redevelopment may provide opportunities to integrate flood management in these planning processes. In order to investigate the support of stakeholders for risk-reducing adaptive measures and more resilient measures, we did research in an unembanked inner-city area in the city of Rotterdam (The Netherlands), in which we conducted in-depth interviews with the central stakeholders. The main conclusion is that the most important barriers for integrating climate adaptation measures into that neighborhood are the fragmentation of water-safety policy (e.g. elevation of rebuilding locations) and the hierarchical governance arrangement in water management. This type of fragmentation led on its turn to fragmentation with other policy goals for the neighborhood. It also led to fragmentation between different areas in the same neighborhood that received political attention and those that are excluded from water-safety policy. This questions the approach in terms of social justice. An important side effect is that this governance arrangement also restricted innovation towards climate adaptation. Therefore, integrating water-safety policies in urban planning (in its capacity as a more integrative and comprehensive spatial approach) should be considered the best option to increase the adaptive capacity in delta cities. Not only can the negative effects in terms of policy fragmentation be dealt with effectively, but also spatial fragmentation can be tackled.展开更多
Despite growing research for residential crowding effects on housing market and public health perspectives, relatively little attention has been paid to explore and model spatial patterns of residential crowding over ...Despite growing research for residential crowding effects on housing market and public health perspectives, relatively little attention has been paid to explore and model spatial patterns of residential crowding over space. This paper focuses upon analyzing the spatial relationships between residential crowding and socio-demographic variables in Alexandria neighborhoods, Egypt. Global and local geo-statistical techniques were employed within GIS-based platform to identify spatial?variations of residential crowding determinates. The global ordinary least squares (OLS) model?assumes homogeneity of relationships between response variable and explanatory variables?across the study area. Consequently, it fails to account for heterogeneity of spatial relationships. Local model known as a geographically weighted regression (GWR) was also employed using the same?response variable and explanatory variables to capture spatial non-stationary of residential?crowding. A comparison of the outputs of both models indicated that OLS explained 74 percent of?residential crowding variations while GWR model explained 79 percent. The GWR improvedstrength of the model and provided a better goodness of fit than OLS. In addition, the findings of this analysis revealed that residential crowding was significantly associated with different structural measures particularly social characteristics of household such as higher education and illiteracy. Similarly, population size of neighborhood and number of dwelling rooms were found to have direct impacts on residential crowding rate. The spatial relationship of these measures distinctly varies over the study area.展开更多
Identifying the geometric information of an object by analyzing the detected radiation fields is an important problem for national and global security.In the present work,an inverse radiation transport model,based on ...Identifying the geometric information of an object by analyzing the detected radiation fields is an important problem for national and global security.In the present work,an inverse radiation transport model,based on the enhanced differential evolution algorithm with global and local neighborhoods(IRT-DEGL),is developed to estimate the unknown layer thickness of the source/shield system with the gamma-ray spectrum.The framework is briefly introduced with the emphasis on handling the enhanced differential evolution algorithm.Using the simulated gamma-ray spectra,the numerical precision of the IRT-DEGL model is evaluated for one-dimensional source systems.Using the detected gamma-ray spectra,the inverse investigations for the unknown thicknesses of multiple shielding layers are performed.By comparing with the traditional gamma-ray absorption method,it is shown that the IRT-EDGL model can provide a much more accurate result and has great potential to be applied for the complicated systems.展开更多
The problem of investigating the minimum set of landmarks consisting of auto-machines(Robots)in a connected network is studied with the concept of location number ormetric dimension of this network.In this paper,we st...The problem of investigating the minimum set of landmarks consisting of auto-machines(Robots)in a connected network is studied with the concept of location number ormetric dimension of this network.In this paper,we study the latest type of metric dimension called as local fractional metric dimension(LFMD)and find its upper bounds for generalized Petersen networks GP(n,3),where n≥7.For n≥9.The limiting values of LFMD for GP(n,3)are also obtained as 1(bounded)if n approaches to infinity.展开更多
Kunzi等在Topology and Its Application上发表的论文中证明了b-度量诱导的拓扑是可度量化的.其在证明b-度量空间的分离性时默认b-度量诱导的球是开集,但存在b-度量诱导的球不是开集的例子.为了使其证明更严谨,证明b-度量诱导的球是球...Kunzi等在Topology and Its Application上发表的论文中证明了b-度量诱导的拓扑是可度量化的.其在证明b-度量空间的分离性时默认b-度量诱导的球是开集,但存在b-度量诱导的球不是开集的例子.为了使其证明更严谨,证明b-度量诱导的球是球心的一个邻域.展开更多
With rapid urbanization,millions of rural villagers have become urban citizens in China.This paper estimates the effect of the in situ urbanization policy on an individual's health by employing the difference-in-d...With rapid urbanization,millions of rural villagers have become urban citizens in China.This paper estimates the effect of the in situ urbanization policy on an individual's health by employing the difference-in-differences framework and using panel survey data from the China Family Panel Studies.Our findings show that this program,unlike other kinds of urbanization,which have had negative impacts on mental health or made people smoke or drink more,increased people's self-reported health status significantly.Further mechanism analysis reveals that the in situ urbanization policy afected health by increasing people's confidence in the future,their satisfaction with their current lives,and their medical insurance enrollment.This study highlights the importance of"the city comes to villagers"urbanization in China,and it can play an essential role in advancing the urbanization rate and avoiding the negative impacts of urbanization on health.展开更多
基金We would like to express our gratitude to the Autonomous University of Baja California(UABC),the Master's and Doctoral Program in Architecture,Urbanism and Design(MyDAUD),as well as the National Council of Science and Technology(Conacyt).The project is linked to the paper:Habitability and post-covid.A study of urban connectivity in public,which has as code:402/3412.This project is internal to the university and it does not have funds.
文摘This study reflects on the impact that the neighborhoods’in-between spaces have on:spatial perception,social interaction,and security.These sites,characterized by their abandonment and deterioration,can also be seen as crucial spaces of opportunity for cities,in the architectural,urban and landscape research.This paper aims to analyze the sociospatial relationships in the neighborhoods’in-between spaces and examine the impact of inbetween space configuration on urban habitability.The investigation draws on a survey of perception to residents about the requirements for a suitable social interaction in these spaces.This study was developed in a neighborhood in the city periphery,characterized by their social dynamics and location in a nature conservation area.The findings indicate that the appropriation process,activities,and collective practices are dependent on the spatial legibility,in this case when this increases,gives rise to improve the habitability and the rehabilitation of the in-between space.Furthermore,the lack of design on in-between spaces substantially affects the use of these spaces and the social interaction among residents.
文摘With the advancement of the transformation,the contradiction between the residents’demand for a better living environment and the convenience of living in the settlements comes to the fore.Effective identification,organic integration,timely adoption,and correct decision-making for the transformation of old neighborhoods are pressing issues in the transformation of old neighborhoods.Therefore,this paper takes the green building evaluation standards of various countries as the research basis and support for the construction of the transformation strategy of old neighborhoods.Through the collection and comparative analysis of the indicators of green building evaluation standards,the index system of transformation is formed,and it also provides a certain foundation for the subsequent related research.
基金Under the auspices of National Natural Science Foundation of China (No.42330510)。
文摘The rise in online home delivery services(OHDS)has had a significant impact on how urban services are supplied and used in recent years.Studies on the spatial accessibility of OHDS are emerging,but few is known about the temporal dimension of OHDS accessibility as well as the geographic and socioeconomic differences in the spatiotemporal accessibility of OHDS.This study measures the spatiotemporal accessibility of four types of OHDS,namely leisure,fresh and convenient,medical,and catering services.The geographic and socioeconomic disparities in the spatiotemporal accessibility of these four types of OHDS are then identified using spatial statistical methods and the Kruskal-Wallis test(K-W test).The case study in Nanjing,China,suggests that:1)spatiotemporal accessibility better reflects the temporal variation of OHDS accessibility and avoids overestimation of OHDS accessibility when only considering its spatial dimension.2)The spatiotemporal accessibility of OHDS varies geographically and socioeconomically.Neighborhoods located in the main city or neighborhoods with higher housing prices,higher population density,and higher point of interest(POI)mix have better OHDS spatiotemporal accessibility.Our study contributes to the understanding of OHDS accessibility from a spatiotemporal perspective,and the empirical insights can assist policymakers in creating intervention plans that take into account variations in OHDS spatiotemporal accessibility.
文摘Cities in deltas are vulnerable to climate change, especially their unembanked neighborhoods that are not protected by dikes. Rising sea levels and extreme water levels in the rivers can lead to the flooding of these urban areas. The Netherlands has a long history in water management. However, building dikes and the elevation of land are traditionally treated as rather stand-alone measures. Attention is rarely paid to the surrounding area, let alone to the complex context of cities and certainly not to disadvantaged neighborhoods. Yet, inner-city area redevelopment may provide opportunities to integrate flood management in these planning processes. In order to investigate the support of stakeholders for risk-reducing adaptive measures and more resilient measures, we did research in an unembanked inner-city area in the city of Rotterdam (The Netherlands), in which we conducted in-depth interviews with the central stakeholders. The main conclusion is that the most important barriers for integrating climate adaptation measures into that neighborhood are the fragmentation of water-safety policy (e.g. elevation of rebuilding locations) and the hierarchical governance arrangement in water management. This type of fragmentation led on its turn to fragmentation with other policy goals for the neighborhood. It also led to fragmentation between different areas in the same neighborhood that received political attention and those that are excluded from water-safety policy. This questions the approach in terms of social justice. An important side effect is that this governance arrangement also restricted innovation towards climate adaptation. Therefore, integrating water-safety policies in urban planning (in its capacity as a more integrative and comprehensive spatial approach) should be considered the best option to increase the adaptive capacity in delta cities. Not only can the negative effects in terms of policy fragmentation be dealt with effectively, but also spatial fragmentation can be tackled.
文摘Despite growing research for residential crowding effects on housing market and public health perspectives, relatively little attention has been paid to explore and model spatial patterns of residential crowding over space. This paper focuses upon analyzing the spatial relationships between residential crowding and socio-demographic variables in Alexandria neighborhoods, Egypt. Global and local geo-statistical techniques were employed within GIS-based platform to identify spatial?variations of residential crowding determinates. The global ordinary least squares (OLS) model?assumes homogeneity of relationships between response variable and explanatory variables?across the study area. Consequently, it fails to account for heterogeneity of spatial relationships. Local model known as a geographically weighted regression (GWR) was also employed using the same?response variable and explanatory variables to capture spatial non-stationary of residential?crowding. A comparison of the outputs of both models indicated that OLS explained 74 percent of?residential crowding variations while GWR model explained 79 percent. The GWR improvedstrength of the model and provided a better goodness of fit than OLS. In addition, the findings of this analysis revealed that residential crowding was significantly associated with different structural measures particularly social characteristics of household such as higher education and illiteracy. Similarly, population size of neighborhood and number of dwelling rooms were found to have direct impacts on residential crowding rate. The spatial relationship of these measures distinctly varies over the study area.
基金supported by the CAEP foundation for Development of Science and Technology(No.2015B0103014)National Natural Science Foundation of China(No.11605163)
文摘Identifying the geometric information of an object by analyzing the detected radiation fields is an important problem for national and global security.In the present work,an inverse radiation transport model,based on the enhanced differential evolution algorithm with global and local neighborhoods(IRT-DEGL),is developed to estimate the unknown layer thickness of the source/shield system with the gamma-ray spectrum.The framework is briefly introduced with the emphasis on handling the enhanced differential evolution algorithm.Using the simulated gamma-ray spectra,the numerical precision of the IRT-DEGL model is evaluated for one-dimensional source systems.Using the detected gamma-ray spectra,the inverse investigations for the unknown thicknesses of multiple shielding layers are performed.By comparing with the traditional gamma-ray absorption method,it is shown that the IRT-EDGL model can provide a much more accurate result and has great potential to be applied for the complicated systems.
基金funded by the Deanship of Scientific Research at Jouf University under Grant No.DSR-2021-03-0301supported by the Higher Education Commission of Pakistan through the National Research Program for Universities Grant No.20-16188/NRPU/R&D/HEC/20212021.
文摘The problem of investigating the minimum set of landmarks consisting of auto-machines(Robots)in a connected network is studied with the concept of location number ormetric dimension of this network.In this paper,we study the latest type of metric dimension called as local fractional metric dimension(LFMD)and find its upper bounds for generalized Petersen networks GP(n,3),where n≥7.For n≥9.The limiting values of LFMD for GP(n,3)are also obtained as 1(bounded)if n approaches to infinity.
基金supported financially by the National Natural Science Foundation of China(Nos.71673282,72073059)the National Social Science Foundation of China(No.19ZDA116).
文摘With rapid urbanization,millions of rural villagers have become urban citizens in China.This paper estimates the effect of the in situ urbanization policy on an individual's health by employing the difference-in-differences framework and using panel survey data from the China Family Panel Studies.Our findings show that this program,unlike other kinds of urbanization,which have had negative impacts on mental health or made people smoke or drink more,increased people's self-reported health status significantly.Further mechanism analysis reveals that the in situ urbanization policy afected health by increasing people's confidence in the future,their satisfaction with their current lives,and their medical insurance enrollment.This study highlights the importance of"the city comes to villagers"urbanization in China,and it can play an essential role in advancing the urbanization rate and avoiding the negative impacts of urbanization on health.
