While functioning as a boundary line,urban waterfront space has a unique charm created by the collision of two different geographical features.WATER has always played a vital role in the birth and progress of human ci...While functioning as a boundary line,urban waterfront space has a unique charm created by the collision of two different geographical features.WATER has always played a vital role in the birth and progress of human civilization,whether it was in the Mesopotamia,the Nile Valley or the Yellow River basin.Water was not only helpful in solving the problems of irrigation,drinking.展开更多
The Long Museum,with its distinctive T-shaped“umbrella-vault”structure,offers a rich array of spatial experiences.This article delves into space from both structural and compositional perspectives.As the constructio...The Long Museum,with its distinctive T-shaped“umbrella-vault”structure,offers a rich array of spatial experiences.This article delves into space from both structural and compositional perspectives.As the construction mediator,the umbrella vault embodies the consistency of construction and implies the causality of the surface.Presented as an element,the space flows freely,showing diverse fields and order.In terms of the liberation of its meaning,the space offers static perception and dynamic experience,creating a rich exhibition atmosphere.As a distinct entity,the umbrella-vault presents the physical nature,and the dialogue between the Long Museum and the city makes it a museum of art for the people.展开更多
In recent years, the rapid development of information and communication technologies accelerates the arrival of the big data era. But it still needs to be explored further for what large data brought on the impact of ...In recent years, the rapid development of information and communication technologies accelerates the arrival of the big data era. But it still needs to be explored further for what large data brought on the impact of urban planning and how to respond to the implementation and formation of urban planning to the end. We will research from two aspects of the practice study and formation of urban planning in Hunan to discuss based on brief review of research about urban space big data era.展开更多
As a matter of expediency, most existing corporate-based urban networks can only be quantitatively measured by either counting the number of linkages or calculating the product of estimated service values. However, th...As a matter of expediency, most existing corporate-based urban networks can only be quantitatively measured by either counting the number of linkages or calculating the product of estimated service values. However, the impreciseness arising due to the limits of quantitative analysis may prove fatal to studies about non-market economies like China. Employing the capital investment dataset as an example, we build a capital-weighted intervention network as well as an unweighted control network to carry out an examination of the quantitative validity in China’s corporate-based urban network analysis. Both the overall spatial pattern and top city-dyads within the capital-weighted network witness Beijing, as the most dominant city, overshadow the performance of the others, and the unweighted network shows multilateral interactions between China’s top cities including Beijing, Shanghai, Shenzhen, and Guangzhou. To further interpret the noticeable differences, we divide the overall network into two subnetworks, inferred by focusing on state-owned enterprises(SOEs) and private enterprises. The results show that the public and private sectors have separately created vastly different subnetworks in China and that SOEs play a much more significant role in terms of capital. Besides fresh insights into China’s urban network, this study provides a cautionary tale reminding researchers of the essentiality and complexity when making a quantitative distinction between different linkages.展开更多
Plants typically exhibit the purple phenomenon as a result of an increase in flavonoids and anthocyanins.A new tea germplasm'P113'was recently selected from Camellia tachangensis,which is purple in tender shoo...Plants typically exhibit the purple phenomenon as a result of an increase in flavonoids and anthocyanins.A new tea germplasm'P113'was recently selected from Camellia tachangensis,which is purple in tender shoots.In the present study,integrated transcriptome and metabolome were used to analyze the flavonoid metabolite components and the genes involved in flavonoid biosynthesis in'P113'.A total of 86 flavonoid metabolites were identified,including 70 significantly differential metabolites(p<0.05)and they were enriched to the three metabolic pathways of ko00941,ko00942 and ko00944 through KEGG pathway analysis.A total of 136 flavonoid involved genes were obtained from transcriptomic study,of which 53 were significantly differentially expressed in developmental shoots.The correlation between metabolite profiling and transcriptome,transcriptome and protein interactions suggested that transcription factor MYB12 and glycosyltransferase UGT78D2 had a good facilitation on purple tender shoots.The metabolic pathways and potential genes that underlie the coloration of the shoots in'P113'are clarified in this study.It also lays the groundwork for identifying potential genes involved in color variation and offers a theoretical framework for the creation and use of distinctive genetic resources and the breeding of new cultivars.展开更多
Using static chamber gas chromatography, we determined the seasonal dynamics, controlling factors, and distribution patterns of forest swamp CH4 levels and related environmental factors (temperature, water level) afte...Using static chamber gas chromatography, we determined the seasonal dynamics, controlling factors, and distribution patterns of forest swamp CH4 levels and related environmental factors (temperature, water level) after fire disturbance in the Xiaoxing’an Mountains. The results showed the following: during the growing season, the annual CH4 emission distribution ranged from - 0.001 ± 0.012 to 22.373 ± 3.650 mg m^-2 h^-1;mild fire caused the swamp CH4 emission flux of tussock, shrub, Alnus sibirica and birch swamp to increase by 56.0–524.7%;at low water levels, temperature had a significant influence on the swamp type, and the correlation between the methane emission flux and temperature was significantly strengthened;after a fire disturbance, methane emissions from all types of marsh were highest in summer and second highest in autumn, with a weak absorption in spring;and along the water environment gradient of the transition zone, the CH4 emission flux presented a decreasing trend in its spatial distribution pattern.展开更多
In recent years,major cities around the world such as New York in USA,Melbourne in Australia,and Shanghai in China,have planned to boost their nighttime urban vibrancy levels to spur the economy and achieve cultural d...In recent years,major cities around the world such as New York in USA,Melbourne in Australia,and Shanghai in China,have planned to boost their nighttime urban vibrancy levels to spur the economy and achieve cultural diversity.The study of nighttime urban vibrancy from the perspective of spatiotemporal characteristics is increasingly being recognized as part of the essential work in the field of urban planning and geography.This research used mobile phone signaling records to measure urban vibrancy in central Shanghai and revealed its spatiotemporal patterns during nighttime.Specifically,this research explored the changes of urban vibrancy within a day,studied the distribution of urban vibrancy during the nighttime,and visually presented the spatiotemporal changes of nighttime urban vibrancy in central Shanghai.Moreover,on the basis of the behavior pattern of each mobile user,we classified nighttime urban vibrancy into three different types:nighttime working vibrancy,nighttime leisure vibrancy,and nighttime floating vibrancy.We then tried to determine how land use affected nighttime leisure vibrancy.The results showed that urban vibrancy in central Shanghai exhibits a periodic pattern over one-day period.A high-level nighttime urban vibrancy belt is present within central Shanghai.Business offices,hotels,entertainment and recreational districts,wholesale markets,and express services contribute most to the vibrancy at nighttime.In addition,the correlation analysis shows that public and commercial facilities generate high levels of nighttime leisure vibrancy than residential facilities.The mixed land use of public and commercial facilities and residential facilities within 500 m is more critical than the mixed use of a single land lot.The research can be a basis for supporting land use planning and providing evidence for policy-making to improve the level of nighttime urban vibrancy in cities.展开更多
High concentration of population and other elements brought by high urbanization has pushed the future construction of urban public spaces to be both "compact" and "ecological". Theory and methodol...High concentration of population and other elements brought by high urbanization has pushed the future construction of urban public spaces to be both "compact" and "ecological". Theory and methodology of landscape urbanism provides a new perspective for the construction of public spaces in high-density urban environment. Based on the concept and basic standpoints of landscape urbanism, this paper elaborated its potential value in spatial connection, functional integration and vitality promotion, and also analyzed practical strategies of landscape urbanism from three perspectives of structure, fold and stage by combining with typical cases, so as to provide references for designing urban public spaces in high-density environment.展开更多
Urban planning decision-making is an activity for the decision-makers to collect information, judge function of cities, select project and make policy which is ainaed at the problem of urban planning that have taken p...Urban planning decision-making is an activity for the decision-makers to collect information, judge function of cities, select project and make policy which is ainaed at the problem of urban planning that have taken place, is taking place and will take place. Using historical review and comparative analysis, the articles summarizes planning decision-makings of Shanwei city and it＇s problem, and makes some suggestions to urban planning decision-making system of Shanwei city in the new period.展开更多
The article delves into the concept of“Chineseness”in contemporary Chinese architecture,a strategic tool for creating distinctive styles rooted in Chinese identity.It serves not only to distinguish projects from mar...The article delves into the concept of“Chineseness”in contemporary Chinese architecture,a strategic tool for creating distinctive styles rooted in Chinese identity.It serves not only to distinguish projects from market-driven trends but also to establish a pivotal position in the global architectural landscape.“Chineseness”among 24 identified keywords represents a practical strategy embraced by many young architects with international exposure.The traditional Chinese dwelling,a symbol of familial and cultural essence,particularly in the context of home culture,is a primary inspiration for contemporary architects.The research adopts a case study approach,focusing on Tulou-related cases from the last fifteen years,encompassing various building types.The Tulou,a mountain-dwelling with rich cultural connotations,is introduced,reflecting ancient Chinese philosophies in its architectural principles.The case studies,including URBANUS’s“Tulou Collective Housing 2008”and Chengdu’s“Tulou Theater,”demonstrate how Tulou prototypes can be creatively adapted.These designs not only replicate forms but also capture the communal spirit inherent in traditional dwellings.“Stepped Courtyards”by OPEN Architecture reinterprets Tulou typology for a staff dormitory,emphasizing community awareness.In conclusion,the concept of“Chineseness”emerges as a prominent topic,showcasing the dynamic and adaptable nature of traditional Chinese culture and modern architectural expressions.The cases illustrate the evolving intersection between traditional Chinese culture and modern architecture,offering insights into the future trajectory of Chinese architectural culture.The interrelated keywords highlight the nuanced and evolving nature of“Chineseness”in architectural practices.展开更多
Under the influence of various natural and human factors, the relationship between the ecosystem services provided for human beings by a karst ecosystem is becoming increasingly complex, profoundly limiting the effect...Under the influence of various natural and human factors, the relationship between the ecosystem services provided for human beings by a karst ecosystem is becoming increasingly complex, profoundly limiting the effective and sustainable development of the social economy and ecosystem protection in karst areas. Taking Guizhou, China as an example, which includes both karst(including five different landforms) and non-karst area, the study explored and compared the tradeoff and synergy between ecosystem services in both terrain types. The results showed higher change rates of water yield and soil retention in karst areas than those in non-karst areas, with only small differences in the carbon storage and crop production change. The ecosystem service relationships in the karst area from 1995 to 2005 were consistent with the relationships in the non-karst area. However, differences were observed in most of these relationships from 2005 to 2015. The relationships between ecosystem services in different karst landforms from 1995 to 2005 remained the same, but there are differences found in the relationships of ecosystem services from 2005 to 2015. The trade-off and synergistic relationships between ecosystem services in the different landforms were closely related to the changes of climate and land use, particularly related to rainfall, rainfall erosivity, farmland, and forestland.展开更多
Antimicrobial resistance(AMR)poses a critical threat to global health and development,with environmental factors—particularly in urban areas—contributing significantly to the spread of antibiotic resistance genes(AR...Antimicrobial resistance(AMR)poses a critical threat to global health and development,with environmental factors—particularly in urban areas—contributing significantly to the spread of antibiotic resistance genes(ARGs).However,most research to date has been conducted at a local level,leaving significant gaps in our understanding of the global status of antibiotic resistance in urban environments.To address this issue,we thoroughly analyzed a total of 86,213 ARGs detected within 4,728 metagenome samples,which were collected by the Meta SUB International Consortium involving diverse urban environments in 60 cities of 27 countries,utilizing a deep-learning based methodology.Our findings demonstrated the strong geographical specificity of urban environmental resistome,and their correlation with various local socioeconomic and medical conditions.We also identified distinctive evolutionary patterns of ARG-related biosynthetic gene clusters(BGCs)across different countries,and discovered that the urban environment represents a rich source of novel antibiotics.Our study provides a comprehensive overview of the global urban environmental resistome,and fills a significant gap in our knowledge of large-scale urban antibiotic resistome analysis.展开更多
In this study,a coniferous tree species(Pinus tabuliformis Carr.) was investigated at a moderate-altitude mountainous terrain on the southern slope of the middle Qinling Mountains(QLM) to detect the trends in carbon i...In this study,a coniferous tree species(Pinus tabuliformis Carr.) was investigated at a moderate-altitude mountainous terrain on the southern slope of the middle Qinling Mountains(QLM) to detect the trends in carbon isotope ratio( δ^(13)C),leaf nitrogen content(LNC) and stomatal density(SD) with altitude variation in northsubtropical humid mountain climate zone of China.The results showed that LNC and SD both significantly increased linearly along the altitudinal gradient ranging from 1000 to 2200 m,whereas leafδ^(13)C exhibited a significantly negative correlation with the altitude.Such a correlation pattern differs obviously from that obtained in offshore low-altitude humid environment or inland high-altitude semi-arid environment,suggesting that the pattern of increasing δ^(13)C with the altitude cannot be generalized.The negative correlation between δ ^(13)C and altitude might be attributed mainly to the strengthening of carbon isotope fractionation in plants caused by increasing precipitation with altitude.Furthermore,there was a remarkable negative correlation between leaf δ ^(13)C and LNC.One possible reason was that increasing precipitation that operates to increase isotopic discrimination with altitude overtook the LNC in determining the sign of leaf δ ^(13)C.The significant negative correlation between leaf δ ^(13)C and SD over altitudes was also found in the present study,indicating that increases in SD with altitude would reduce,rather than enhance plant δ^(13)C values.展开更多
Urban spatial expansion characteristics are the responses of urbanization acts on the geographical space. Analyzing the characteristics can reveal the process of urban expansion and mechanism which is one of useful me...Urban spatial expansion characteristics are the responses of urbanization acts on the geographical space. Analyzing the characteristics can reveal the process of urban expansion and mechanism which is one of useful methods to find out the sustainable land use strategy balancing development and protection. In this paper, two main methods have been deployed in analyzing the spatial expansion characteristics of rapid urbanization region. One is the expansion index method and the other is fractal dimension method. And the results show that town-level urban sprawl has increased in a non-linear way since 1985, and even the increments of the urban expansion intensity are fluctuated. Morphology transformation from scatter to concentration is common phenomenon in the process of urbanization in the towns. From the morphology point of view, downtowns are more homogenous than towns with less variation. The concentration is the leading development trend in downtowns. And the more distance from the downtown is, the more spatial pattern morphology will be observed. These characteristics indicate that macro-scale policies of economic development and land use management have great impacts on the formation and characteristics of spatial patterns of urban dynamic patterns.展开更多
Low-carbon tourism is an irresistible development trend of world tourism industry, domestic and international theoretical researches and practices have remained in the exploration stage, especially function and role o...Low-carbon tourism is an irresistible development trend of world tourism industry, domestic and international theoretical researches and practices have remained in the exploration stage, especially function and role of humanistic tourism resources in low-carbon tourism have not been fully recognized. In this study, facility environment is regarded as the fundamental requirement of low-carbon tourism development, and humanistic elements as the connotative support. Therefore, based on exploring low-carbon utilization features and functions of humanistic tourism resources, the low-carbon techniques and models of using humanistic tourism resources were proposed, for example, designing low-carbon humanistic tourism products characterized by "inheritance + innovation"; establishing the coordinated development system for low-carbon utilization and connotative preservation of humanistic tourism resources; realizing the utilization model with low energy consumption, low emission and pollution under the premise of maintaining integrality, diversity and sustainability of humanistic tourism system, so as to enrich connotations of low-carbon tourism and bring sustainable vitality of low-carbon tourism.展开更多
Gently dipping fractures subjected to river incision are widely distributed on rock slopes.In this paper,a rock slope on the Nujiang River(China)is investigated to study the role of gently dipping fractures in the roc...Gently dipping fractures subjected to river incision are widely distributed on rock slopes.In this paper,a rock slope on the Nujiang River(China)is investigated to study the role of gently dipping fractures in the rock slopes evolution.Detailed field surveys indicate that gentle fractures are concentrated in four main zones.Moreover,the kinematics of the fracture system suggest that the genesis of these fractures can be synthesized into a progressive evolution model.This model indicates that the joints begin with the formation of an array of en echelon cracks that are subjected to continued crack elongation and shearing before ultimately approaching one another and interacting to form a complex joint system.Geomechanical analysis is performed to reveal the mechanisms of this genesis,and three main fracture patterns are identified based on the slope stress and are classified with respect to the slope evolution.Based on the detail field investigations and the evolutionary history of the river valley,we propose that intermittent incision by the river was the main factor contributing to the concentrated distribution of gently dipping joints.展开更多
From the perspective of urban greenhouse gas inventory, this paper analyzed the composition and tendency of urban greenhouse gas inventory of Guangzhou, and compared greenhouse gas inventory of representative internat...From the perspective of urban greenhouse gas inventory, this paper analyzed the composition and tendency of urban greenhouse gas inventory of Guangzhou, and compared greenhouse gas inventory of representative international cities. Taking Guangzhou Haizhu Eco-city for example, this paper from the perspective of urban-rural planning put forward the low-carbon development paths and strategies such as increasing carbon sink, industrial transformation, spatial restructuring, traffic organization, green civil engineering and resource utilization, and green building for the main carbon-emitting fields such as industry, energy supply, transport, building and waste disposal.展开更多
Based on the data of rural human settlements in Licheng District of Jinan City in 2016,the evaluation system of rural human settlements composed of four subsystems（ social economy,infrastructure,public environment,an...Based on the data of rural human settlements in Licheng District of Jinan City in 2016,the evaluation system of rural human settlements composed of four subsystems（ social economy,infrastructure,public environment,and construction management） was constructed. According to the comprehensive scores of various administrative villages calculated by means of multi-index comprehensive evaluation method and fuzzy comprehensive evaluation method,the human settlements of 521 administrative villages in Licheng District were divided into four types： excellent,good,average,and poor. Moreover,the spatial differences in the evaluation results of rural human settlements were analyzed using GIS spatial analysis technology. Finally,based on the evaluation results of rural human settlements in Licheng District,some measures to improve and control rural human settlements in different types of villages at various development stages were proposed to fully improve the quality of rural human settlements.展开更多
With the development of cities, problems like natural and social disasters appeared more and more frequently. For example, rapid urbanization and climate change have caused both increasing flood probability and the se...With the development of cities, problems like natural and social disasters appeared more and more frequently. For example, rapid urbanization and climate change have caused both increasing flood probability and the severity of flooding. Consequently, there is a need for all cities to develop new strategies to maintain their vitality in numerous challenges and crises. This paper in the first place reviews the concept and research fields of urban resilience;besides, according to the characteristics of the Ilmpark situated in Weimar, This paper analyzes the necessity and potential on stormwater management of this area and then it concludes the alternative strategies of improvement based on the theory of urban resilience.展开更多
Rock fissures constitute the main habitat type in the karst rocky desertification(KRD)area,but the effects of their network morphology on soil properties remain unknown.To address this,we investigated 46 rock vertical...Rock fissures constitute the main habitat type in the karst rocky desertification(KRD)area,but the effects of their network morphology on soil properties remain unknown.To address this,we investigated 46 rock vertical profile plots in Guizhou Province of China and classified their habitats using the morphological characteristics of their fissure networks.The response characteristics of soil nutrients and enzyme activities to the rock fissure morphologies in different rock habitats were discussed,and the main factors affecting soil nutrients and enzyme activities were comprehensively analyzed.Rock fissure networks were divided into three types:Type 1,a random type,with a low dip angle,long trace length,multiple turns,multiple connections,and high density;Type 2,a uniform type,with a moderate dip angle,moderate trace length,fewer turns,fewer connections,and moderate density;and Type 3,an aggregation type,with a high dip angle,short trace length,fewer turns,moderate connections,and low density.Soil nutrient levels and enzyme activities were the highest in Type 1,followed by Types 2 and 3.There were no significant differences between the total phosphorus and available phosphorus content in Types 1-3.The dip angle,fractal dimension,and average trace length were identified as the main factors affecting soil nutrients and enzyme activities,and Type 1 was the most conducive for soil nutrient and enzyme accumulation.The restoration of Type 2 and 3 areas should be emphasized in future research,as these results will help guide vegetation restoration in KRD areas.展开更多
文摘While functioning as a boundary line,urban waterfront space has a unique charm created by the collision of two different geographical features.WATER has always played a vital role in the birth and progress of human civilization,whether it was in the Mesopotamia,the Nile Valley or the Yellow River basin.Water was not only helpful in solving the problems of irrigation,drinking.
文摘The Long Museum,with its distinctive T-shaped“umbrella-vault”structure,offers a rich array of spatial experiences.This article delves into space from both structural and compositional perspectives.As the construction mediator,the umbrella vault embodies the consistency of construction and implies the causality of the surface.Presented as an element,the space flows freely,showing diverse fields and order.In terms of the liberation of its meaning,the space offers static perception and dynamic experience,creating a rich exhibition atmosphere.As a distinct entity,the umbrella-vault presents the physical nature,and the dialogue between the Long Museum and the city makes it a museum of art for the people.
基金National Natural Science Foundation of China [41371182] approval： NSC gold count [2013] 57 items
文摘In recent years, the rapid development of information and communication technologies accelerates the arrival of the big data era. But it still needs to be explored further for what large data brought on the impact of urban planning and how to respond to the implementation and formation of urban planning to the end. We will research from two aspects of the practice study and formation of urban planning in Hunan to discuss based on brief review of research about urban space big data era.
基金Under the auspices of the National Social Science Foundation of China(No.16ZDA017)。
文摘As a matter of expediency, most existing corporate-based urban networks can only be quantitatively measured by either counting the number of linkages or calculating the product of estimated service values. However, the impreciseness arising due to the limits of quantitative analysis may prove fatal to studies about non-market economies like China. Employing the capital investment dataset as an example, we build a capital-weighted intervention network as well as an unweighted control network to carry out an examination of the quantitative validity in China’s corporate-based urban network analysis. Both the overall spatial pattern and top city-dyads within the capital-weighted network witness Beijing, as the most dominant city, overshadow the performance of the others, and the unweighted network shows multilateral interactions between China’s top cities including Beijing, Shanghai, Shenzhen, and Guangzhou. To further interpret the noticeable differences, we divide the overall network into two subnetworks, inferred by focusing on state-owned enterprises(SOEs) and private enterprises. The results show that the public and private sectors have separately created vastly different subnetworks in China and that SOEs play a much more significant role in terms of capital. Besides fresh insights into China’s urban network, this study provides a cautionary tale reminding researchers of the essentiality and complexity when making a quantitative distinction between different linkages.
基金supported by the Project of the National key R&D plan(2021YFD1200203-1)Science and Technology Plan Project of Guizhou province,in RP China([2019]1404)+2 种基金Project of the National Science Foundation,in RP China(32060700),Project of the key field project of Natural Science Foundation of Guizhou Provincial Department of education(KY[2021]042)Science and Technology Plan Project of Guizhou province,in RP China([2021]General Project 126)Project of the National key R&D plan(2021YFD1100307)。
文摘Plants typically exhibit the purple phenomenon as a result of an increase in flavonoids and anthocyanins.A new tea germplasm'P113'was recently selected from Camellia tachangensis,which is purple in tender shoots.In the present study,integrated transcriptome and metabolome were used to analyze the flavonoid metabolite components and the genes involved in flavonoid biosynthesis in'P113'.A total of 86 flavonoid metabolites were identified,including 70 significantly differential metabolites(p<0.05)and they were enriched to the three metabolic pathways of ko00941,ko00942 and ko00944 through KEGG pathway analysis.A total of 136 flavonoid involved genes were obtained from transcriptomic study,of which 53 were significantly differentially expressed in developmental shoots.The correlation between metabolite profiling and transcriptome,transcriptome and protein interactions suggested that transcription factor MYB12 and glycosyltransferase UGT78D2 had a good facilitation on purple tender shoots.The metabolic pathways and potential genes that underlie the coloration of the shoots in'P113'are clarified in this study.It also lays the groundwork for identifying potential genes involved in color variation and offers a theoretical framework for the creation and use of distinctive genetic resources and the breeding of new cultivars.
基金supported by postdoctoral grant of HeiLongJiang(Grant No.LBH-Z17002)
文摘Using static chamber gas chromatography, we determined the seasonal dynamics, controlling factors, and distribution patterns of forest swamp CH4 levels and related environmental factors (temperature, water level) after fire disturbance in the Xiaoxing’an Mountains. The results showed the following: during the growing season, the annual CH4 emission distribution ranged from - 0.001 ± 0.012 to 22.373 ± 3.650 mg m^-2 h^-1;mild fire caused the swamp CH4 emission flux of tussock, shrub, Alnus sibirica and birch swamp to increase by 56.0–524.7%;at low water levels, temperature had a significant influence on the swamp type, and the correlation between the methane emission flux and temperature was significantly strengthened;after a fire disturbance, methane emissions from all types of marsh were highest in summer and second highest in autumn, with a weak absorption in spring;and along the water environment gradient of the transition zone, the CH4 emission flux presented a decreasing trend in its spatial distribution pattern.
基金the National Natural Science Foundation of China(41771170).
文摘In recent years,major cities around the world such as New York in USA,Melbourne in Australia,and Shanghai in China,have planned to boost their nighttime urban vibrancy levels to spur the economy and achieve cultural diversity.The study of nighttime urban vibrancy from the perspective of spatiotemporal characteristics is increasingly being recognized as part of the essential work in the field of urban planning and geography.This research used mobile phone signaling records to measure urban vibrancy in central Shanghai and revealed its spatiotemporal patterns during nighttime.Specifically,this research explored the changes of urban vibrancy within a day,studied the distribution of urban vibrancy during the nighttime,and visually presented the spatiotemporal changes of nighttime urban vibrancy in central Shanghai.Moreover,on the basis of the behavior pattern of each mobile user,we classified nighttime urban vibrancy into three different types:nighttime working vibrancy,nighttime leisure vibrancy,and nighttime floating vibrancy.We then tried to determine how land use affected nighttime leisure vibrancy.The results showed that urban vibrancy in central Shanghai exhibits a periodic pattern over one-day period.A high-level nighttime urban vibrancy belt is present within central Shanghai.Business offices,hotels,entertainment and recreational districts,wholesale markets,and express services contribute most to the vibrancy at nighttime.In addition,the correlation analysis shows that public and commercial facilities generate high levels of nighttime leisure vibrancy than residential facilities.The mixed land use of public and commercial facilities and residential facilities within 500 m is more critical than the mixed use of a single land lot.The research can be a basis for supporting land use planning and providing evidence for policy-making to improve the level of nighttime urban vibrancy in cities.
文摘High concentration of population and other elements brought by high urbanization has pushed the future construction of urban public spaces to be both "compact" and "ecological". Theory and methodology of landscape urbanism provides a new perspective for the construction of public spaces in high-density urban environment. Based on the concept and basic standpoints of landscape urbanism, this paper elaborated its potential value in spatial connection, functional integration and vitality promotion, and also analyzed practical strategies of landscape urbanism from three perspectives of structure, fold and stage by combining with typical cases, so as to provide references for designing urban public spaces in high-density environment.
基金Acknowledgments The authors gratefully acknowledge the financial support provided by Foundation for Distinguished Young Talents in Higher Education of Guangdong, China （Project No： wyrnl1049） and the Natural Natural Science Foundation of China （Project No. 40901066）.
文摘Urban planning decision-making is an activity for the decision-makers to collect information, judge function of cities, select project and make policy which is ainaed at the problem of urban planning that have taken place, is taking place and will take place. Using historical review and comparative analysis, the articles summarizes planning decision-makings of Shanwei city and it＇s problem, and makes some suggestions to urban planning decision-making system of Shanwei city in the new period.
文摘The article delves into the concept of“Chineseness”in contemporary Chinese architecture,a strategic tool for creating distinctive styles rooted in Chinese identity.It serves not only to distinguish projects from market-driven trends but also to establish a pivotal position in the global architectural landscape.“Chineseness”among 24 identified keywords represents a practical strategy embraced by many young architects with international exposure.The traditional Chinese dwelling,a symbol of familial and cultural essence,particularly in the context of home culture,is a primary inspiration for contemporary architects.The research adopts a case study approach,focusing on Tulou-related cases from the last fifteen years,encompassing various building types.The Tulou,a mountain-dwelling with rich cultural connotations,is introduced,reflecting ancient Chinese philosophies in its architectural principles.The case studies,including URBANUS’s“Tulou Collective Housing 2008”and Chengdu’s“Tulou Theater,”demonstrate how Tulou prototypes can be creatively adapted.These designs not only replicate forms but also capture the communal spirit inherent in traditional dwellings.“Stepped Courtyards”by OPEN Architecture reinterprets Tulou typology for a staff dormitory,emphasizing community awareness.In conclusion,the concept of“Chineseness”emerges as a prominent topic,showcasing the dynamic and adaptable nature of traditional Chinese culture and modern architectural expressions.The cases illustrate the evolving intersection between traditional Chinese culture and modern architecture,offering insights into the future trajectory of Chinese architectural culture.The interrelated keywords highlight the nuanced and evolving nature of“Chineseness”in architectural practices.
基金supported by the Science and Technology Foundation of Guizhou Province(NO.[2020]1Y152)the Humanity and Social Science Youth foundation of the Ministry of Education(18YJCZH042)the Scientific Research Foundation of the Guizhou Institute of Technology
文摘Under the influence of various natural and human factors, the relationship between the ecosystem services provided for human beings by a karst ecosystem is becoming increasingly complex, profoundly limiting the effective and sustainable development of the social economy and ecosystem protection in karst areas. Taking Guizhou, China as an example, which includes both karst(including five different landforms) and non-karst area, the study explored and compared the tradeoff and synergy between ecosystem services in both terrain types. The results showed higher change rates of water yield and soil retention in karst areas than those in non-karst areas, with only small differences in the carbon storage and crop production change. The ecosystem service relationships in the karst area from 1995 to 2005 were consistent with the relationships in the non-karst area. However, differences were observed in most of these relationships from 2005 to 2015. The relationships between ecosystem services in different karst landforms from 1995 to 2005 remained the same, but there are differences found in the relationships of ecosystem services from 2005 to 2015. The trade-off and synergistic relationships between ecosystem services in the different landforms were closely related to the changes of climate and land use, particularly related to rainfall, rainfall erosivity, farmland, and forestland.
基金supported by the National Key Research and Development Program of China(2023YFC2706503)the National Natural Science Foundation of China(32370720)+9 种基金Beihang University&Capital Medical University Plan(BHME-201904)the Open Research Fund of Key Laboratory of Advanced Theory and Application in Statistics and Data Science-MOE,ECNU,Key Laboratory of MEA,Ministry of Education,ECNU,Key Laboratory of Ecology and Energy Saving Study of Dense Habitat(Tongji University),Ministry of Education-Shanghai Tongji Urban Planning&Design Institute Co.,Ltd Joint Research Project(KY-2022-LH-A03)Shanghai Tongji Urban Planning&Design Institute Co.,Ltd-China Intelligent Urbanization Co-creation Center for High Density Region Research Project(KY-2022-PT-A02)the Irma T.Hirschl and Monique Weill-Caulier Charitable TrustsBert L and N Kuggie Vallee Foundationthe World Quant FoundationThe Pershing Square Sohn Cancer Research Alliancethe National Institutes of Health(R01AI151059)the National Science Foundation(1840275)the Alfred P.Sloan Foundation(G-2015-13964)。
文摘Antimicrobial resistance(AMR)poses a critical threat to global health and development,with environmental factors—particularly in urban areas—contributing significantly to the spread of antibiotic resistance genes(ARGs).However,most research to date has been conducted at a local level,leaving significant gaps in our understanding of the global status of antibiotic resistance in urban environments.To address this issue,we thoroughly analyzed a total of 86,213 ARGs detected within 4,728 metagenome samples,which were collected by the Meta SUB International Consortium involving diverse urban environments in 60 cities of 27 countries,utilizing a deep-learning based methodology.Our findings demonstrated the strong geographical specificity of urban environmental resistome,and their correlation with various local socioeconomic and medical conditions.We also identified distinctive evolutionary patterns of ARG-related biosynthetic gene clusters(BGCs)across different countries,and discovered that the urban environment represents a rich source of novel antibiotics.Our study provides a comprehensive overview of the global urban environmental resistome,and fills a significant gap in our knowledge of large-scale urban antibiotic resistome analysis.
基金supported by Hunan Province Natural Science Foundation (No.2015JJ2062)the State Key Laboratory of Soil and Sustainable Agriculture (Grant No.Y412201416)the Scientific Research Fund of Hunan Provincial Education Department (Grant No.14A054)
文摘In this study,a coniferous tree species(Pinus tabuliformis Carr.) was investigated at a moderate-altitude mountainous terrain on the southern slope of the middle Qinling Mountains(QLM) to detect the trends in carbon isotope ratio( δ^(13)C),leaf nitrogen content(LNC) and stomatal density(SD) with altitude variation in northsubtropical humid mountain climate zone of China.The results showed that LNC and SD both significantly increased linearly along the altitudinal gradient ranging from 1000 to 2200 m,whereas leafδ^(13)C exhibited a significantly negative correlation with the altitude.Such a correlation pattern differs obviously from that obtained in offshore low-altitude humid environment or inland high-altitude semi-arid environment,suggesting that the pattern of increasing δ^(13)C with the altitude cannot be generalized.The negative correlation between δ ^(13)C and altitude might be attributed mainly to the strengthening of carbon isotope fractionation in plants caused by increasing precipitation with altitude.Furthermore,there was a remarkable negative correlation between leaf δ ^(13)C and LNC.One possible reason was that increasing precipitation that operates to increase isotopic discrimination with altitude overtook the LNC in determining the sign of leaf δ ^(13)C.The significant negative correlation between leaf δ ^(13)C and SD over altitudes was also found in the present study,indicating that increases in SD with altitude would reduce,rather than enhance plant δ^(13)C values.
文摘Urban spatial expansion characteristics are the responses of urbanization acts on the geographical space. Analyzing the characteristics can reveal the process of urban expansion and mechanism which is one of useful methods to find out the sustainable land use strategy balancing development and protection. In this paper, two main methods have been deployed in analyzing the spatial expansion characteristics of rapid urbanization region. One is the expansion index method and the other is fractal dimension method. And the results show that town-level urban sprawl has increased in a non-linear way since 1985, and even the increments of the urban expansion intensity are fluctuated. Morphology transformation from scatter to concentration is common phenomenon in the process of urbanization in the towns. From the morphology point of view, downtowns are more homogenous than towns with less variation. The concentration is the leading development trend in downtowns. And the more distance from the downtown is, the more spatial pattern morphology will be observed. These characteristics indicate that macro-scale policies of economic development and land use management have great impacts on the formation and characteristics of spatial patterns of urban dynamic patterns.
基金Supported by Humanities and Social Sciences Youth Foundation of Tongji University
文摘Low-carbon tourism is an irresistible development trend of world tourism industry, domestic and international theoretical researches and practices have remained in the exploration stage, especially function and role of humanistic tourism resources in low-carbon tourism have not been fully recognized. In this study, facility environment is regarded as the fundamental requirement of low-carbon tourism development, and humanistic elements as the connotative support. Therefore, based on exploring low-carbon utilization features and functions of humanistic tourism resources, the low-carbon techniques and models of using humanistic tourism resources were proposed, for example, designing low-carbon humanistic tourism products characterized by "inheritance + innovation"; establishing the coordinated development system for low-carbon utilization and connotative preservation of humanistic tourism resources; realizing the utilization model with low energy consumption, low emission and pollution under the premise of maintaining integrality, diversity and sustainability of humanistic tourism system, so as to enrich connotations of low-carbon tourism and bring sustainable vitality of low-carbon tourism.
基金financially supported by the National Natural Science Foundation of China (Grant No. 41521002 41130745+2 种基金 41272330)State Key Laboratory of Geohazard Prevention and Geoenvironment Protection Independent Research Project (Grant No. SKLGP2016Z015)supported by the Funding of Science and Technology Office of Sichuan Province (Grant Nos. 2015JQ0020)
文摘Gently dipping fractures subjected to river incision are widely distributed on rock slopes.In this paper,a rock slope on the Nujiang River(China)is investigated to study the role of gently dipping fractures in the rock slopes evolution.Detailed field surveys indicate that gentle fractures are concentrated in four main zones.Moreover,the kinematics of the fracture system suggest that the genesis of these fractures can be synthesized into a progressive evolution model.This model indicates that the joints begin with the formation of an array of en echelon cracks that are subjected to continued crack elongation and shearing before ultimately approaching one another and interacting to form a complex joint system.Geomechanical analysis is performed to reveal the mechanisms of this genesis,and three main fracture patterns are identified based on the slope stress and are classified with respect to the slope evolution.Based on the detail field investigations and the evolutionary history of the river valley,we propose that intermittent incision by the river was the main factor contributing to the concentrated distribution of gently dipping joints.
基金Sponsored by Guangdong Provincial Key Science&Technology Program(2012A010800011)Guangdong Provincial Natural Science Foundation(S2013010014467)+1 种基金2013"Twelfth Five-year Plan"Program of Guangzhou Philosophy and Social Science Development(13G15)Guangzhou Municipal Science&Technology Program(2014KP000069)
文摘From the perspective of urban greenhouse gas inventory, this paper analyzed the composition and tendency of urban greenhouse gas inventory of Guangzhou, and compared greenhouse gas inventory of representative international cities. Taking Guangzhou Haizhu Eco-city for example, this paper from the perspective of urban-rural planning put forward the low-carbon development paths and strategies such as increasing carbon sink, industrial transformation, spatial restructuring, traffic organization, green civil engineering and resource utilization, and green building for the main carbon-emitting fields such as industry, energy supply, transport, building and waste disposal.
文摘Based on the data of rural human settlements in Licheng District of Jinan City in 2016,the evaluation system of rural human settlements composed of four subsystems（ social economy,infrastructure,public environment,and construction management） was constructed. According to the comprehensive scores of various administrative villages calculated by means of multi-index comprehensive evaluation method and fuzzy comprehensive evaluation method,the human settlements of 521 administrative villages in Licheng District were divided into four types： excellent,good,average,and poor. Moreover,the spatial differences in the evaluation results of rural human settlements were analyzed using GIS spatial analysis technology. Finally,based on the evaluation results of rural human settlements in Licheng District,some measures to improve and control rural human settlements in different types of villages at various development stages were proposed to fully improve the quality of rural human settlements.
文摘With the development of cities, problems like natural and social disasters appeared more and more frequently. For example, rapid urbanization and climate change have caused both increasing flood probability and the severity of flooding. Consequently, there is a need for all cities to develop new strategies to maintain their vitality in numerous challenges and crises. This paper in the first place reviews the concept and research fields of urban resilience;besides, according to the characteristics of the Ilmpark situated in Weimar, This paper analyzes the necessity and potential on stormwater management of this area and then it concludes the alternative strategies of improvement based on the theory of urban resilience.
基金funded by the National Natural Science Foundation of China(31971453)。
文摘Rock fissures constitute the main habitat type in the karst rocky desertification(KRD)area,but the effects of their network morphology on soil properties remain unknown.To address this,we investigated 46 rock vertical profile plots in Guizhou Province of China and classified their habitats using the morphological characteristics of their fissure networks.The response characteristics of soil nutrients and enzyme activities to the rock fissure morphologies in different rock habitats were discussed,and the main factors affecting soil nutrients and enzyme activities were comprehensively analyzed.Rock fissure networks were divided into three types:Type 1,a random type,with a low dip angle,long trace length,multiple turns,multiple connections,and high density;Type 2,a uniform type,with a moderate dip angle,moderate trace length,fewer turns,fewer connections,and moderate density;and Type 3,an aggregation type,with a high dip angle,short trace length,fewer turns,moderate connections,and low density.Soil nutrient levels and enzyme activities were the highest in Type 1,followed by Types 2 and 3.There were no significant differences between the total phosphorus and available phosphorus content in Types 1-3.The dip angle,fractal dimension,and average trace length were identified as the main factors affecting soil nutrients and enzyme activities,and Type 1 was the most conducive for soil nutrient and enzyme accumulation.The restoration of Type 2 and 3 areas should be emphasized in future research,as these results will help guide vegetation restoration in KRD areas.
