Urban agglomeration of the Yangtze Delta （UAYD）, one of the most developed regions of China, has witnessed an increasing prevalence in building ecological cities when the ecological cities are pursued by many modem ...Urban agglomeration of the Yangtze Delta （UAYD）, one of the most developed regions of China, has witnessed an increasing prevalence in building ecological cities when the ecological cities are pursued by many modem cities, and great achievements have been made in this regard. It is inevitable, however, that certain problems exist during the construction of ecological city, which include but not limited to non-harmonious development of urban complex ecosystem, and the difficulty in quantifying eco-city construction or incomplete quantification in assessing the construction of present and future eco-city. Based on the analysis on social-economic conditions and regional conditions of the UAYD, this paper attempts to set up an index system of eco-cities combining with local characteristics, and to adopt the indices of eco-city, urban harmony, and eco-city colligate to evaluate the ecological level, urban harmonious development and eco-city construction of cities within the UAYD. Results indicate that among 15 cities in UAYD, Suzhou City ranks the highest in terms of eco-city construction, whereas Nantong ranks relatively lower; sustainable eco-city construction is possible only when cities are developed in every respect of harmony.展开更多
Greenways can be considered as linear open spaces along natural or artificial linear features such as rivers. shorelines, ridgelines, railroads, canals or roads. They are planned, designed, and managed to connect and ...Greenways can be considered as linear open spaces along natural or artificial linear features such as rivers. shorelines, ridgelines, railroads, canals or roads. They are planned, designed, and managed to connect and protect ecological, scenic, recreational, historic, and cultural resources, The archetype of greenways could go back to the landscape axes and boulevards of Europe in the 18^th century and later tire parkways of USA in the late 19^th century . As a means of urban ecological planning, greenway planning is getting more and more important to sustainable development in urban areas and has become a worldwide activity or a movement. This paper reviews the evolution of greenways and identifies it into three distinct stages or “generations ”. introduces a general methodology of greenway planning, and expounds the functions of greenways to ecotitles. At the end. this paper emphasizes that it is significant to enhance the research and implementation of greenway planning in our country in the case that urbanization will be developing qulckly in the next decades.展开更多
The recent advancements made in the realms of Artificial Intelligence(AI)and Artificial Intelligence of Things(AIoT)have unveiled transformative prospects and opportunities to enhance and optimize the environmental pe...The recent advancements made in the realms of Artificial Intelligence(AI)and Artificial Intelligence of Things(AIoT)have unveiled transformative prospects and opportunities to enhance and optimize the environmental performance and efficiency of smart cities.These strides have,in turn,impacted smart eco-cities,catalyzing ongoing improvements and driving solutions to address complex environmental challenges.This aligns with the visionary concept of smarter eco-cities,an emerging paradigm of urbanism characterized by the seamless integration of advanced technologies and environmental strategies.However,there remains a significant gap in thoroughly understanding this new paradigm and the intricate spectrum of its multifaceted underlying dimensions.To bridge this gap,this study provides a comprehensive systematic review of the burgeoning landscape of smarter eco-cities and their leadingedge AI and AIoT solutions for environmental sustainability.To ensure thoroughness,the study employs a unified evidence synthesis framework integrating aggregative,configurative,and narrative synthesis approaches.At the core of this study lie these subsequent research inquiries:What are the foundational underpinnings of emerging smarter eco-cities,and how do they intricately interrelate,particularly urbanism paradigms,environmental solutions,and data-driven technologies?What are the key drivers and enablers propelling the materialization of smarter eco-cities?What are the primary AI and AIoT solutions that can be harnessed in the development of smarter eco-cities?In what ways do AI and AIoT technologies contribute to fostering environmental sustainability practices,and what potential benefits and opportunities do they offer for smarter eco-cities?What challenges and barriers arise in the implementation of AI and AIoT solutions for the development of smarter eco-cities?The findings significantly deepen and broaden our understanding of both the significant potential of AI and AIoT technologies to enhance sustainable urban development practices,as well as the formidable nature of the challenges they pose.Beyond theoretical enrichment,these findings offer invaluable insights and new perspectives poised to empower policymakers,practitioners,and researchers to advance the integration of eco-urbanism and AI-and AIoT-driven urbanism.Through an insightful exploration of the contemporary urban landscape and the identification of successfully applied AI and AIoT solutions,stakeholders gain the necessary groundwork for making well-informed decisions,implementing effective strategies,and designing policies that prioritize environmental well-being.展开更多
Ecological agriculture is the important industrial foundation for building eco-cities,while green agriculture policy plays an essential role in promoting sustainable development of ecological agriculture. This paper a...Ecological agriculture is the important industrial foundation for building eco-cities,while green agriculture policy plays an essential role in promoting sustainable development of ecological agriculture. This paper analyzed the relationship between green agriculture policy and developing eco-cities and characteristics of green agriculture policies in European countries and the United States developing ecological cities.Besides,it summarized experience,in hope of providing beneficial reference for China developing eco-cities.展开更多
Firstly,the necessities of ecological agriculture development in Big Qinling Eco-city Cluster were discussed.Then,condition endowment of eco-agricultural industrialization in Big Qinling Eco-city Cluster was analyzed ...Firstly,the necessities of ecological agriculture development in Big Qinling Eco-city Cluster were discussed.Then,condition endowment of eco-agricultural industrialization in Big Qinling Eco-city Cluster was analyzed from the aspects of basic conditions and differential endowment of eco-agricultural industrialization.Finally,specific forms and functional orientation of eco-agriculture were pointed out.Countermeasures for the eco-agricultural industrialization in Big Qinling Eco-city Cluster were put forward.Firstly,the government guidance and the media publicity should be strengthened.Secondly,financial support for the eco-agricultural industrialization in Big Qinling Eco-city Cluster should be enhanced.Thirdly,branding strategies of eco-agricultural products in Big Qinling Eco-city Cluster should be implemented as soon as possible.展开更多
By reviewing researches on environmental performance evaluation of current eco-city construction, this paper analyzed characteristics and deficiencies of the evaluation methods and index systems, and took Haizhu Eco-c...By reviewing researches on environmental performance evaluation of current eco-city construction, this paper analyzed characteristics and deficiencies of the evaluation methods and index systems, and took Haizhu Eco-city for example to assess the environmental performance of eco-city construction from the perspectives of land, water environment, regional weather, and biodiversity. On this basis, a scientific, objective and feasible evaluation method and index system was basically formed so as to demonstrate the efficiency of eco-city construction, and to provide scientific support for the dynamic adjustment and optimization of eco-city construction.展开更多
A research project wus conducted to manufacture eco-cement for sustainable development using cement kiln dust（ CKD ） and granular blast furnace slag（ GBFS ）. In the project, the burning process and minerul composi...A research project wus conducted to manufacture eco-cement for sustainable development using cement kiln dust（ CKD ） and granular blast furnace slag（ GBFS ）. In the project, the burning process and minerul compositions of CKD dinker were investigated. Different minerulizers such as CaSO4 and CaF2 , sulfur and alkali corttent were coasidered. The strength of CKD and GBFS eco-cement were evaluated. The results indicate the CKD clinker can not only form ordinary cement clinker minerals such as C3 S, C2 S and C4 AF , but also form such high-reuctive minerals as C4 A3 S and C. A7 · CaF2 . The CKD and GBFS eco-cement will have the similar strength to the Portland cement grade 32.5 when blend proportion is properly applied.展开更多
On the basis of previous researches on current eco-city indicator system in China, achievements of Caofeidian Eco-city and Sino-Singapore Tianjin Eco-city in the establishment of indicator system were compared, and th...On the basis of previous researches on current eco-city indicator system in China, achievements of Caofeidian Eco-city and Sino-Singapore Tianjin Eco-city in the establishment of indicator system were compared, and their differences in indicator construction framework, indicator component ratio and indicator valuation were summarized. It was found through studying the indicator systems that local indicators should stress characteristics of the city on the basis of national standards, and comply with urban construction conditions; and also that indicator system needed balance between macro and micro level, more reasonable value, and further improvement in the construction and management.展开更多
On the basis of analyzing the development of suburban forest parks, the paper proposed the combination of eco-city construction and suburban forest parks, and the construction of "mega-landscape" mode, which...On the basis of analyzing the development of suburban forest parks, the paper proposed the combination of eco-city construction and suburban forest parks, and the construction of "mega-landscape" mode, which offers a new concept for the development of suburban forest parks.展开更多
Eco-city development is a healthy process towards sustainable development, within the carrying capacity of local ecosystem through changing production mode, consumption behavior and decision instrument based on ecolog...Eco-city development is a healthy process towards sustainable development, within the carrying capacity of local ecosystem through changing production mode, consumption behavior and decision instrument based on ecological economics and system engineering. The key to its planning is an ecological integration to make trade-off between economic wealth and environmental health, between material and spiritual civilization, between natural and human eco-cybernetics. Integration, demonstration, citizens’ participation and scientists’ and technician’s catalyzing are the key instruments for the implementation of the ecocity plan. "Clean production" and "ecological industry" are key elements in comprehensive development towards an eco-city. Beyond the technical and management questions, how to interlink production, consumption and reduction at the local and regional level, the spatial and urban dimension should be considered in order to perform an integrative urban eco-space.展开更多
This paper reviews the birth and development of eco-city research by means of historical analysis and literature search. It elaborates the concepts,connotations and principles of scholars both at home and abroad. By c...This paper reviews the birth and development of eco-city research by means of historical analysis and literature search. It elaborates the concepts,connotations and principles of scholars both at home and abroad. By comparing the research and practice differences between domestic and foreign eco-city construction,it reviews the various indicators and research progress applied in the current eco-city construction in foreign countries. It systematically sorts out the characteristics of eco-city construction practice in China and points out the main problems in the construction of China's eco-city.展开更多
After the rapid large-scale but rough development in China since 1978,environmental issues occurred at the same time.As a result,China started to pay attention to environmental protection and try to seek a way of deco...After the rapid large-scale but rough development in China since 1978,environmental issues occurred at the same time.As a result,China started to pay attention to environmental protection and try to seek a way of decoupling economic growth and the environment.Eco-city is regarded as a solution widely supported by the central government.After learning from international experience,China has explored a distinctive way to develop eco-cities within the specific Chinese context.This paper aims to evaluate the development of Chinese eco-cities.Sino-Singapore Tianjin Eco-city is taken as a case study to analyze based on daily lifestyle of its residents.A total of 22 interviews,and three days of potential observations were collected in this study as a database.Summative content analysis is applied with 15 keywords and three categories.Policy suggestions are provided at the end aiming to overcome the current existing weakness.展开更多
Starting from the transformation and upgrading of traditional culture,the optimization and development of traditional industries,and the innovation of traditional models,this paper used cultural entrepreneurship to tr...Starting from the transformation and upgrading of traditional culture,the optimization and development of traditional industries,and the innovation of traditional models,this paper used cultural entrepreneurship to trigger the thematic business engine,and explored Zhucheng City with its unique dinosaur culture.It proposed"Three-integration"rolling development mode to build Zhucheng into a new highland of cultural entrepreneurship and create new competitiveness under the background of agricultural and rural modernization development.This paper also explored from the perspective of multi-subject collaboration of cultural entrepreneurship.Government needs to establish rolling development pilot projects and promote their application;enterprises need to play the engine role of thematic business through the mode of"getting larger to help smaller ones";the masses need to pay attention to the reaction of culture to the economy,so as to promote the wave of high-level promotion of cultural inheritance and urban-rural integration.展开更多
Nowadays, cities are the main living environment of human beings. Rapid urbanization is associated with a variety of issues： population explosion, urban heat island effect, greenhouse gases emissions, energy crisis, ...Nowadays, cities are the main living environment of human beings. Rapid urbanization is associated with a variety of issues： population explosion, urban heat island effect, greenhouse gases emissions, energy crisis, climate change and so on. To deal with the challenges from the huge energy consumption and GHGs （greenhouse gases） emission, more and more attention has been paid to low carbon eco-city in China. In this research, the whole process is linked by low carbon eco-city development. High-resolution thermal IR （infrared） satellite remote-sensing is introduced to land use and urban heat island monitoring to meet the requirement of higher accuracy. GIS （geo-information science） technology provides a framework for collecting, processing, managing, analyzing and sharing spatial and temporal data. It has been used in spatial and temporal database management and analysis in low carbon eco-city study. The integrated geo-information system proposed in this research, which will be introduced to various government agencies in China, could enrich the concepts and means for the construction of low carbon eco^city.展开更多
On the basis of the concept of＂lake ecosystem health＂, the paper proposes that the planning and development of lakeside regions shall be oriented towards the core target of preserving ＂healthy lake＂ and all the co...On the basis of the concept of＂lake ecosystem health＂, the paper proposes that the planning and development of lakeside regions shall be oriented towards the core target of preserving ＂healthy lake＂ and all the construction work in lakeside regions shall be conducted within the ecosystem carrying capacity limits that the lakes can withstand. To achieve this core target, the paper first identifies main indicators describing healthy lake ecosystem and defines the external factors that can influence the health of lake eco-system. Then based on this, two kinds of urban planning methods are proposed to maintain the stability of lake eco-system health through controlling the external factors that can affect the health of lake eco-system. The first is to propose controlling factors in urban planning, such as division of ecological sensitive zones, controlling the development intensity, population capacity and types of industry in the lakeside regions and the second is to construct a monitoring and early warning system for lake eco-system health. The theories and methods mentioned in this paper have been applied to the planning of Wuhan Wutong Lake eco-city.展开更多
Ordinary Portland Cement (OPC) is by mass the largest manufactured product on Earth, responsible for approximately 6% - 8% of global anthropogenic carbon dioxide emissions (CO<sub>2</sub>) and 35% of indus...Ordinary Portland Cement (OPC) is by mass the largest manufactured product on Earth, responsible for approximately 6% - 8% of global anthropogenic carbon dioxide emissions (CO<sub>2</sub>) and 35% of industrial CO<sub>2</sub> emissions. On average 0.8 to 0.9 ton of CO<sub>2</sub> is emitted to produce one ton of OPC. In this paper, partial substitution of clinker (30% - 35%) by the calcined clay-limestone mixture was investigated in order to produce an eco-cement (LC3). Analyzes by XRF, XRD and ATG/ATD have characterized different components, determined the calcination temperature and selected the right clay which can act as effective Supplementary Cementitious Material (SCM). Mechanical tests on mortar carried out over a period of 90 days. The WBCSD/WRI “Greenhouse Gas Protocol” methodology then allowed the calculation of CO<sub>2</sub> emissions into the atmosphere. Three types of clay are available in the Songololo Region. The kaolinite is the principal clay mineral and its content varies from 27% to 34%. The sum of kaolinite and amorphous phase which enable clay to react with cementitious material ranges from 57% to 60%. The SiO<sub>2</sub> content ranges from 33% to 76%, the Alumina content from 12% to 20% so that the ratio Al<sub>2</sub>O<sub>3</sub>/SiO<sub>2</sub> is on the higher side (0.17 - 0.53). The calcination window is between 750°C and 850°C and the best clay which can act as SCM identified. The clinker’s substitution reduced CO<sub>2</sub> emissions from 0.824 ton of CO<sub>2</sub> for one ton of OPC to 0.640 ton of CO<sub>2</sub> for one ton of LC3, means 22% less emissions. The compressive strengths developed by LC3 vary from 8.91 to 57.6 MPa (Day 1 to Day 90), exceed those of references 32.5 cement and are close to 42.5 cement. In view of the results, LC3 cement can be considered for industrial trials.展开更多
Reasonable ＂eco-city＂in the external between urban and rural areas should make a complete ecological cycle of the system, so that the internal energy efficiency and low pollution, resource use environmentally clean,...Reasonable ＂eco-city＂in the external between urban and rural areas should make a complete ecological cycle of the system, so that the internal energy efficiency and low pollution, resource use environmentally clean, quiet comfortable life of the people, as well as other elements of the organic： unity of urban greening. So, ＂Eco-City＂, ＂urban ecology＂ are two heterogeneous areas should be treated differently. However, in rural and urban dualistic situation, China advocated ＂ecological city＂ ignored the rural ecological balance, resulting in ＂eco-city＂development directly into＂ urban ecology＂ construction within the city along with the waste of resources, water pollution, serious problems of air pollution, noise pollution, the deep ＂eco-city＂ into representation＂ urban ecology＂, in the standard does not cover up the sound, making the generation between rural and urban＂ material Rift ,＂after all ,can not be filled.展开更多
China is a country whose natural resources are groaning under the weight of new demands. The World Bank estimates that every year twenty million people move into the nation's rapidly expanding cities. The environm...China is a country whose natural resources are groaning under the weight of new demands. The World Bank estimates that every year twenty million people move into the nation's rapidly expanding cities. The environmental pressure resulting from this urbanisation is extreme as low quality, inefficient housing is thrown up and enormous road展开更多
This research systematically investigates urban three-dimensional greening layout optimization and smart ecocity construction using deep learning and remote sensing technology.An improved U-Net++ architecture combined...This research systematically investigates urban three-dimensional greening layout optimization and smart ecocity construction using deep learning and remote sensing technology.An improved U-Net++ architecture combined with multi-source remote sensing data achieved high-precision recognition of urban three-dimensional greening with 92.8% overall accuracy.Analysis of spatiotemporal evolution patterns in Shanghai,Hangzhou,and Nanjing revealed that threedimensional greening shows a development trend from demonstration to popularization,with 16.5% annual growth rate.The study quantitatively assessed ecological benefits of various three-dimensional greening types.Results indicate that modular vertical greening and intensive roof gardens yield highest ecological benefits,while climbing-type vertical greening and extensive roof gardens offer optimal benefit-cost ratios.Integration of multiple forms generates 15-22% synergistic enhancement.Compared with traditional planning,the multi-objective optimization-based layout achieved 27.5% increase in carbon sequestration,32.6% improvement in temperature regulation,35.8% enhancement in stormwater management,and 42.3% rise in biodiversity index.Three pilot projects validated that actual ecological benefits reached 90.3-102.3% of predicted values.Multi-scenario simulations indicate optimized layouts can reduce urban heat island intensity by 15.2-18.7%,increase carbon neutrality contribution to 8.6-10.2%,and decrease stormwater runoff peaks by 25.3-32.6%.The findings provide technical methods for urban three-dimensional greening optimization and smart eco-city construction,promoting sustainable urban development.展开更多
Based on the actual situation,this paper summarizes and analyzes the key points of eco-city planning in urban planning and design,and hopes to provide help to researchers in related fields after the discussion.
文摘Urban agglomeration of the Yangtze Delta （UAYD）, one of the most developed regions of China, has witnessed an increasing prevalence in building ecological cities when the ecological cities are pursued by many modem cities, and great achievements have been made in this regard. It is inevitable, however, that certain problems exist during the construction of ecological city, which include but not limited to non-harmonious development of urban complex ecosystem, and the difficulty in quantifying eco-city construction or incomplete quantification in assessing the construction of present and future eco-city. Based on the analysis on social-economic conditions and regional conditions of the UAYD, this paper attempts to set up an index system of eco-cities combining with local characteristics, and to adopt the indices of eco-city, urban harmony, and eco-city colligate to evaluate the ecological level, urban harmonious development and eco-city construction of cities within the UAYD. Results indicate that among 15 cities in UAYD, Suzhou City ranks the highest in terms of eco-city construction, whereas Nantong ranks relatively lower; sustainable eco-city construction is possible only when cities are developed in every respect of harmony.
基金Supported by the National Natural Science Foundation of China for Distinguished Young Scholars (No.50425927)the Key Project of National Development and Reform Commission of China(No.2002BA516A15-12)the Natural Science Foundations of Hunan (No.04JJ3013).
文摘Greenways can be considered as linear open spaces along natural or artificial linear features such as rivers. shorelines, ridgelines, railroads, canals or roads. They are planned, designed, and managed to connect and protect ecological, scenic, recreational, historic, and cultural resources, The archetype of greenways could go back to the landscape axes and boulevards of Europe in the 18^th century and later tire parkways of USA in the late 19^th century . As a means of urban ecological planning, greenway planning is getting more and more important to sustainable development in urban areas and has become a worldwide activity or a movement. This paper reviews the evolution of greenways and identifies it into three distinct stages or “generations ”. introduces a general methodology of greenway planning, and expounds the functions of greenways to ecotitles. At the end. this paper emphasizes that it is significant to enhance the research and implementation of greenway planning in our country in the case that urbanization will be developing qulckly in the next decades.
基金funding from the European Union's Horizon 2020 research and innovation program under the Marie Sklodowska-Curie grant agreement No.101034260.
文摘The recent advancements made in the realms of Artificial Intelligence(AI)and Artificial Intelligence of Things(AIoT)have unveiled transformative prospects and opportunities to enhance and optimize the environmental performance and efficiency of smart cities.These strides have,in turn,impacted smart eco-cities,catalyzing ongoing improvements and driving solutions to address complex environmental challenges.This aligns with the visionary concept of smarter eco-cities,an emerging paradigm of urbanism characterized by the seamless integration of advanced technologies and environmental strategies.However,there remains a significant gap in thoroughly understanding this new paradigm and the intricate spectrum of its multifaceted underlying dimensions.To bridge this gap,this study provides a comprehensive systematic review of the burgeoning landscape of smarter eco-cities and their leadingedge AI and AIoT solutions for environmental sustainability.To ensure thoroughness,the study employs a unified evidence synthesis framework integrating aggregative,configurative,and narrative synthesis approaches.At the core of this study lie these subsequent research inquiries:What are the foundational underpinnings of emerging smarter eco-cities,and how do they intricately interrelate,particularly urbanism paradigms,environmental solutions,and data-driven technologies?What are the key drivers and enablers propelling the materialization of smarter eco-cities?What are the primary AI and AIoT solutions that can be harnessed in the development of smarter eco-cities?In what ways do AI and AIoT technologies contribute to fostering environmental sustainability practices,and what potential benefits and opportunities do they offer for smarter eco-cities?What challenges and barriers arise in the implementation of AI and AIoT solutions for the development of smarter eco-cities?The findings significantly deepen and broaden our understanding of both the significant potential of AI and AIoT technologies to enhance sustainable urban development practices,as well as the formidable nature of the challenges they pose.Beyond theoretical enrichment,these findings offer invaluable insights and new perspectives poised to empower policymakers,practitioners,and researchers to advance the integration of eco-urbanism and AI-and AIoT-driven urbanism.Through an insightful exploration of the contemporary urban landscape and the identification of successfully applied AI and AIoT solutions,stakeholders gain the necessary groundwork for making well-informed decisions,implementing effective strategies,and designing policies that prioritize environmental well-being.
基金Supported by Project of National Social Science Foundation(11BJY101)
文摘Ecological agriculture is the important industrial foundation for building eco-cities,while green agriculture policy plays an essential role in promoting sustainable development of ecological agriculture. This paper analyzed the relationship between green agriculture policy and developing eco-cities and characteristics of green agriculture policies in European countries and the United States developing ecological cities.Besides,it summarized experience,in hope of providing beneficial reference for China developing eco-cities.
文摘Firstly,the necessities of ecological agriculture development in Big Qinling Eco-city Cluster were discussed.Then,condition endowment of eco-agricultural industrialization in Big Qinling Eco-city Cluster was analyzed from the aspects of basic conditions and differential endowment of eco-agricultural industrialization.Finally,specific forms and functional orientation of eco-agriculture were pointed out.Countermeasures for the eco-agricultural industrialization in Big Qinling Eco-city Cluster were put forward.Firstly,the government guidance and the media publicity should be strengthened.Secondly,financial support for the eco-agricultural industrialization in Big Qinling Eco-city Cluster should be enhanced.Thirdly,branding strategies of eco-agricultural products in Big Qinling Eco-city Cluster should be implemented as soon as possible.
基金Sponsored by Soft Sscience Research Program of the Ministry of Housing and Urban-Rural Development of the People’s Republic of China(2015-K3-024)Guangdong Provincial Key Scientific and Technological Program(2012A010800011)+1 种基金"The Twelfth Five-year Plan"National Scientific and Technological Support Program(2012BAC13B04)Guangdong Provincial Natural Science Foundation(S2013010014467)
文摘By reviewing researches on environmental performance evaluation of current eco-city construction, this paper analyzed characteristics and deficiencies of the evaluation methods and index systems, and took Haizhu Eco-city for example to assess the environmental performance of eco-city construction from the perspectives of land, water environment, regional weather, and biodiversity. On this basis, a scientific, objective and feasible evaluation method and index system was basically formed so as to demonstrate the efficiency of eco-city construction, and to provide scientific support for the dynamic adjustment and optimization of eco-city construction.
基金Funded by the National Natural Science Foundation of China(No.50178058)
文摘A research project wus conducted to manufacture eco-cement for sustainable development using cement kiln dust（ CKD ） and granular blast furnace slag（ GBFS ）. In the project, the burning process and minerul compositions of CKD dinker were investigated. Different minerulizers such as CaSO4 and CaF2 , sulfur and alkali corttent were coasidered. The strength of CKD and GBFS eco-cement were evaluated. The results indicate the CKD clinker can not only form ordinary cement clinker minerals such as C3 S, C2 S and C4 AF , but also form such high-reuctive minerals as C4 A3 S and C. A7 · CaF2 . The CKD and GBFS eco-cement will have the similar strength to the Portland cement grade 32.5 when blend proportion is properly applied.
文摘On the basis of previous researches on current eco-city indicator system in China, achievements of Caofeidian Eco-city and Sino-Singapore Tianjin Eco-city in the establishment of indicator system were compared, and their differences in indicator construction framework, indicator component ratio and indicator valuation were summarized. It was found through studying the indicator systems that local indicators should stress characteristics of the city on the basis of national standards, and comply with urban construction conditions; and also that indicator system needed balance between macro and micro level, more reasonable value, and further improvement in the construction and management.
基金Sponsored by"Twelfth Five-year Plan"of Jiangxi Provincial Social Sciences Program(14SH05)
文摘On the basis of analyzing the development of suburban forest parks, the paper proposed the combination of eco-city construction and suburban forest parks, and the construction of "mega-landscape" mode, which offers a new concept for the development of suburban forest parks.
文摘Eco-city development is a healthy process towards sustainable development, within the carrying capacity of local ecosystem through changing production mode, consumption behavior and decision instrument based on ecological economics and system engineering. The key to its planning is an ecological integration to make trade-off between economic wealth and environmental health, between material and spiritual civilization, between natural and human eco-cybernetics. Integration, demonstration, citizens’ participation and scientists’ and technician’s catalyzing are the key instruments for the implementation of the ecocity plan. "Clean production" and "ecological industry" are key elements in comprehensive development towards an eco-city. Beyond the technical and management questions, how to interlink production, consumption and reduction at the local and regional level, the spatial and urban dimension should be considered in order to perform an integrative urban eco-space.
文摘This paper reviews the birth and development of eco-city research by means of historical analysis and literature search. It elaborates the concepts,connotations and principles of scholars both at home and abroad. By comparing the research and practice differences between domestic and foreign eco-city construction,it reviews the various indicators and research progress applied in the current eco-city construction in foreign countries. It systematically sorts out the characteristics of eco-city construction practice in China and points out the main problems in the construction of China's eco-city.
文摘After the rapid large-scale but rough development in China since 1978,environmental issues occurred at the same time.As a result,China started to pay attention to environmental protection and try to seek a way of decoupling economic growth and the environment.Eco-city is regarded as a solution widely supported by the central government.After learning from international experience,China has explored a distinctive way to develop eco-cities within the specific Chinese context.This paper aims to evaluate the development of Chinese eco-cities.Sino-Singapore Tianjin Eco-city is taken as a case study to analyze based on daily lifestyle of its residents.A total of 22 interviews,and three days of potential observations were collected in this study as a database.Summative content analysis is applied with 15 keywords and three categories.Policy suggestions are provided at the end aiming to overcome the current existing weakness.
文摘Starting from the transformation and upgrading of traditional culture,the optimization and development of traditional industries,and the innovation of traditional models,this paper used cultural entrepreneurship to trigger the thematic business engine,and explored Zhucheng City with its unique dinosaur culture.It proposed"Three-integration"rolling development mode to build Zhucheng into a new highland of cultural entrepreneurship and create new competitiveness under the background of agricultural and rural modernization development.This paper also explored from the perspective of multi-subject collaboration of cultural entrepreneurship.Government needs to establish rolling development pilot projects and promote their application;enterprises need to play the engine role of thematic business through the mode of"getting larger to help smaller ones";the masses need to pay attention to the reaction of culture to the economy,so as to promote the wave of high-level promotion of cultural inheritance and urban-rural integration.
文摘Nowadays, cities are the main living environment of human beings. Rapid urbanization is associated with a variety of issues： population explosion, urban heat island effect, greenhouse gases emissions, energy crisis, climate change and so on. To deal with the challenges from the huge energy consumption and GHGs （greenhouse gases） emission, more and more attention has been paid to low carbon eco-city in China. In this research, the whole process is linked by low carbon eco-city development. High-resolution thermal IR （infrared） satellite remote-sensing is introduced to land use and urban heat island monitoring to meet the requirement of higher accuracy. GIS （geo-information science） technology provides a framework for collecting, processing, managing, analyzing and sharing spatial and temporal data. It has been used in spatial and temporal database management and analysis in low carbon eco-city study. The integrated geo-information system proposed in this research, which will be introduced to various government agencies in China, could enrich the concepts and means for the construction of low carbon eco^city.
文摘On the basis of the concept of＂lake ecosystem health＂, the paper proposes that the planning and development of lakeside regions shall be oriented towards the core target of preserving ＂healthy lake＂ and all the construction work in lakeside regions shall be conducted within the ecosystem carrying capacity limits that the lakes can withstand. To achieve this core target, the paper first identifies main indicators describing healthy lake ecosystem and defines the external factors that can influence the health of lake eco-system. Then based on this, two kinds of urban planning methods are proposed to maintain the stability of lake eco-system health through controlling the external factors that can affect the health of lake eco-system. The first is to propose controlling factors in urban planning, such as division of ecological sensitive zones, controlling the development intensity, population capacity and types of industry in the lakeside regions and the second is to construct a monitoring and early warning system for lake eco-system health. The theories and methods mentioned in this paper have been applied to the planning of Wuhan Wutong Lake eco-city.
文摘Ordinary Portland Cement (OPC) is by mass the largest manufactured product on Earth, responsible for approximately 6% - 8% of global anthropogenic carbon dioxide emissions (CO<sub>2</sub>) and 35% of industrial CO<sub>2</sub> emissions. On average 0.8 to 0.9 ton of CO<sub>2</sub> is emitted to produce one ton of OPC. In this paper, partial substitution of clinker (30% - 35%) by the calcined clay-limestone mixture was investigated in order to produce an eco-cement (LC3). Analyzes by XRF, XRD and ATG/ATD have characterized different components, determined the calcination temperature and selected the right clay which can act as effective Supplementary Cementitious Material (SCM). Mechanical tests on mortar carried out over a period of 90 days. The WBCSD/WRI “Greenhouse Gas Protocol” methodology then allowed the calculation of CO<sub>2</sub> emissions into the atmosphere. Three types of clay are available in the Songololo Region. The kaolinite is the principal clay mineral and its content varies from 27% to 34%. The sum of kaolinite and amorphous phase which enable clay to react with cementitious material ranges from 57% to 60%. The SiO<sub>2</sub> content ranges from 33% to 76%, the Alumina content from 12% to 20% so that the ratio Al<sub>2</sub>O<sub>3</sub>/SiO<sub>2</sub> is on the higher side (0.17 - 0.53). The calcination window is between 750°C and 850°C and the best clay which can act as SCM identified. The clinker’s substitution reduced CO<sub>2</sub> emissions from 0.824 ton of CO<sub>2</sub> for one ton of OPC to 0.640 ton of CO<sub>2</sub> for one ton of LC3, means 22% less emissions. The compressive strengths developed by LC3 vary from 8.91 to 57.6 MPa (Day 1 to Day 90), exceed those of references 32.5 cement and are close to 42.5 cement. In view of the results, LC3 cement can be considered for industrial trials.
文摘Reasonable ＂eco-city＂in the external between urban and rural areas should make a complete ecological cycle of the system, so that the internal energy efficiency and low pollution, resource use environmentally clean, quiet comfortable life of the people, as well as other elements of the organic： unity of urban greening. So, ＂Eco-City＂, ＂urban ecology＂ are two heterogeneous areas should be treated differently. However, in rural and urban dualistic situation, China advocated ＂ecological city＂ ignored the rural ecological balance, resulting in ＂eco-city＂development directly into＂ urban ecology＂ construction within the city along with the waste of resources, water pollution, serious problems of air pollution, noise pollution, the deep ＂eco-city＂ into representation＂ urban ecology＂, in the standard does not cover up the sound, making the generation between rural and urban＂ material Rift ,＂after all ,can not be filled.
文摘China is a country whose natural resources are groaning under the weight of new demands. The World Bank estimates that every year twenty million people move into the nation's rapidly expanding cities. The environmental pressure resulting from this urbanisation is extreme as low quality, inefficient housing is thrown up and enormous road
文摘This research systematically investigates urban three-dimensional greening layout optimization and smart ecocity construction using deep learning and remote sensing technology.An improved U-Net++ architecture combined with multi-source remote sensing data achieved high-precision recognition of urban three-dimensional greening with 92.8% overall accuracy.Analysis of spatiotemporal evolution patterns in Shanghai,Hangzhou,and Nanjing revealed that threedimensional greening shows a development trend from demonstration to popularization,with 16.5% annual growth rate.The study quantitatively assessed ecological benefits of various three-dimensional greening types.Results indicate that modular vertical greening and intensive roof gardens yield highest ecological benefits,while climbing-type vertical greening and extensive roof gardens offer optimal benefit-cost ratios.Integration of multiple forms generates 15-22% synergistic enhancement.Compared with traditional planning,the multi-objective optimization-based layout achieved 27.5% increase in carbon sequestration,32.6% improvement in temperature regulation,35.8% enhancement in stormwater management,and 42.3% rise in biodiversity index.Three pilot projects validated that actual ecological benefits reached 90.3-102.3% of predicted values.Multi-scenario simulations indicate optimized layouts can reduce urban heat island intensity by 15.2-18.7%,increase carbon neutrality contribution to 8.6-10.2%,and decrease stormwater runoff peaks by 25.3-32.6%.The findings provide technical methods for urban three-dimensional greening optimization and smart eco-city construction,promoting sustainable urban development.
文摘Based on the actual situation,this paper summarizes and analyzes the key points of eco-city planning in urban planning and design,and hopes to provide help to researchers in related fields after the discussion.
