China is carving out a distinctive development path which features urban-rural integration.This approach has not only yielded tangible results domestically but also drawn the attention of other countries.
Against the backdrop of digital transformation,the agricultural digital economy is showing promising development trends,yet it also faces numerous challenges that hinder its high-quality growth.To align with the requi...Against the backdrop of digital transformation,the agricultural digital economy is showing promising development trends,yet it also faces numerous challenges that hinder its high-quality growth.To align with the requirements of agricultural digital transformation in the new era,it is necessary to accelerate the construction of digital infrastructure,create a favorable industrial environment,enhance the overall quality of the workforce,and implement a comprehensive approach to elevate the development level of the agricultural digital economy,thereby driving the high-quality development of modern agriculture.This article focuses on the development of the agricultural digital economy,summarizes relevant policies and practical pathways,and aims to provide references for related theories and practices.展开更多
Under the background of"Digital Commerce for Rural Vitalization",rural E-commerce has experienced rapid development.However,agricultural products like strawberries,often produced by small-scale,fragmented,an...Under the background of"Digital Commerce for Rural Vitalization",rural E-commerce has experienced rapid development.However,agricultural products like strawberries,often produced by small-scale,fragmented,and less competitive individual farmers,struggle to meet the compliance and scalability demands of E-commerce,thereby constraining high-quality local economic development.Aiming to address this issue,this paper,guided by relevant policies and strategies,employs case analysis and logical deduction to explore the industrialization path of the"Cooperative+E-commerce"model for the strawberry industry.The research finds that by optimizing the cooperative's organizational structure,implementing multi-channel E-commerce strategies,upgrading the supply chain(including cold chain and quality traceability),and engaging in collaborative brand building,a robust industrial system can be formed.Supplemented by benefit evaluation,policy support,and regulatory oversight,this system can effectively bridge small-scale production with the broader market.This study concludes that this pathway can enhance the added value of the strawberry industry,increase farmer incomes,and provide practical insights for promoting high-quality local economic development.展开更多
Against the background of the integration of the digital economy and industrial intelligence,AI technology has become the core support for the logistics industry to reduce costs,improve efficiency,and break through de...Against the background of the integration of the digital economy and industrial intelligence,AI technology has become the core support for the logistics industry to reduce costs,improve efficiency,and break through development bottlenecks.This paper constructs a research framework of“Application Scenarios-Transformation Mechanism-Challenges-Development Path,”systematically analyzing the application value and practical issues of AI in the logistics industry.The core applications of AI are concentrated in three scenarios:intelligent customer service,logistics data analysis and decision optimization,and intelligent inventory management.Through process automation replacement,service model upgrading,and data-driven decision-making,it achieves a systematic transformation of industry operational efficiency improvement,customer experience optimization,and decision-making model transformation.At the same time,AI applications still face practical challenges such as insufficient technical integration compatibility,data security and privacy protection risks,and talent structure adaptation gaps.In the future,the logistics industry needs to fully release the value of AI technology by deepening the integration of AI with cross-technologies,promoting green and flexible development.展开更多
With the proposed carbon-neutrality targets,intermittent renewable energy will become increasingly significant for the power sector in the future.It is vital to study its development paths,particularly for wind power ...With the proposed carbon-neutrality targets,intermittent renewable energy will become increasingly significant for the power sector in the future.It is vital to study its development paths,particularly for wind power and photovoltaics,while considering constraints on diffusion potential.Using learning curves,dynamic programming,and Bass models,this study analyzes technological diffusion trends to determine the most cost-effective development route for intermittent renewable energy power generation in China by 2060.This study simplifies reality by examining the individual diffusion processes of wind and photovoltaic power,focusing on the self-diffusion characteristics of the two technologies.The study assumes that self-diffusion is the primary driver of future development and describe the influence of multiple factors.The study finds that supportive policies are key drivers of development in the early stages of intermittent renewable energy deployment,especially for photovoltaics.The current diffusion scale of photovoltaics has a greater positive impact on its future development than that of wind power due to lower costs.In the long term,the phased goal for 2030 is projected to be met ahead of schedule,and the majority of future intermittent renewable energy output is expected to come from photovoltaics.The rapid development phases of photovoltaic and wind power conclude at similar times,but the maximum diffusion potential of photovoltaics is higher than that of wind power.Investment constraints and technological levels affect the initial and middle phases of the development path,but their effects are limited.The capacity of the power grid remains the key constraint in the entire research field.展开更多
During the development blasting of circular tunnels, the detonation of multiple blastholes arranged onconcentric circles induces a complex dynamic response in the surrounding rocks. This process involvesmultiple blast...During the development blasting of circular tunnels, the detonation of multiple blastholes arranged onconcentric circles induces a complex dynamic response in the surrounding rocks. This process involvesmultiple blast loadings, static stress unloadings, and stress redistributions. In this study, the dynamicstresses of the surrounding rocks during development blasting, considering multiple blasting-unloadingstages with exponential paths and triangular paths (linear simplified paths of exponential paths), aresolved based on the dynamic theory and the Fourier transform method. Then, a corresponding discreteelement model is established using particle flow code (PFC). The multiple-stage dynamic stress andfracture distribution under different in situ stress levels and lateral coefficients are investigated. Theoreticalresults indicate that the peak compressive stresses in the surrounding rocks induced by bothtriangular and exponential paths are equal, while the triangular path generates greater additional dynamictensile stresses, particularly in the circumferential direction, compared to the exponential path.Numerical results show that the exponential path causes less dynamic circumferential tensile damageand forms fewer radial fractures than the triangular path in the first few blast stages;conversely, itexacerbates the damage and instability in the final blasting-unloading stage and forms more circumferentialfractures. Furthermore, the in situ stress determines which of the two opposite effects isdominant. Therefore, when using overly simplified triangular paths to evaluate the stability of surroundingrocks, potential overestimation or underestimation caused by different failure mechanismsshould be considered. Specifically, under high horizontal and vertical stresses, the static stress redistributionwith layer-by-layer blasting suppresses dynamic circumferential tensile and radial compressivedamage. The damage evolution of surrounding rocks in multi-stage blasting under different in situstresses is summarized and classified according to the damage mechanism and characteristics, which canguide blasting and support design.展开更多
With the continuous advancement of big data technology,its application in precision agriculture is becoming more and more extensive,which provides a new path for agricultural modernization.Based on the background of b...With the continuous advancement of big data technology,its application in precision agriculture is becoming more and more extensive,which provides a new path for agricultural modernization.Based on the background of big data technology,this paper discusses the development path of precision agriculture.The research shows that the application of big data technology in precision agriculture is mainly reflected in crop growth monitoring and prediction,soil fertility assessment and regulation,water resources management and optimization,agricultural product traceability and origin tracing,and agricultural product supply chain management and risk control.However,the application of big data technology in the agricultural field stll encounters numerous challenges,such as data collection and processing,data analysis and application,and privacy protection and security.To this end,this paper puts forward countermeasures,including strengthening infrastructure construction and establishing data sharing and management mechanisms.展开更多
In October 2024,at the 27th ChinaASEAN Leaders'Meeting,the leaders of China and ten ASEAN nations announced the substantial conclusion of the China-ASEAN FTA 3.0 Upgrade Negotiations,and proposed that the two side...In October 2024,at the 27th ChinaASEAN Leaders'Meeting,the leaders of China and ten ASEAN nations announced the substantial conclusion of the China-ASEAN FTA 3.0 Upgrade Negotiations,and proposed that the two sides would strive to formally sign in 2025 the Protocol on Further Upgrading the China-ASEAN Comprehensive Economic Cooperation Framework Agreement and pertinent agreements under the Agreement.展开更多
With the low-carbon coordinated development in Beijing-Tianjin-Hebei Region as the starting point, the necessity and realistic difficulties in achieving the lowcarbon coordination in Beijing-Tianjin-Hebei Region was a...With the low-carbon coordinated development in Beijing-Tianjin-Hebei Region as the starting point, the necessity and realistic difficulties in achieving the lowcarbon coordination in Beijing-Tianjin-Hebei Region was analyzed, based on which we constructed the systematic analytical framework for low-carbon coordination in Beijing-Tianjin-Hebei Region, and proposed the development path of regional lowcarbon coordinated development from the three levels of government, industry and consumer with the aim to provide specific references for the low-carbon coordinated development in Beijing-Tianjin-Hebei Region.展开更多
This work takes the 36 cities from China＇s low-carbon pilot project as the research object and uses the carbon emission per capita and GDP per capita to categorize the 36 cities into four types to reveal their low-ca...This work takes the 36 cities from China＇s low-carbon pilot project as the research object and uses the carbon emission per capita and GDP per capita to categorize the 36 cities into four types to reveal their low-carbon development status; these four types are leading cities, developing cities, latecomer cities, and exploring cities. On the basis of an index system that quantitatively describes low-carbon development, this research analyzes the characteristics, development trends, and low-carbon development pathways of the four types of cities. According to the present situation and objectives of national emissions and considering the differences in development stages, challenges, and opportunities for each type of the city, this research presents recommendations for the low-carbon roadmap and the medium- and long-term （by 2030） emission trend routes of different types of regions in China.展开更多
The urban and rural areas are regarded as two major components of the regional economic system.Only through joint balanced development of the two can we achieve overall economic optimization and social welfare maximiz...The urban and rural areas are regarded as two major components of the regional economic system.Only through joint balanced development of the two can we achieve overall economic optimization and social welfare maximization.But the great social division of labor has separated urban areas from rural areas,which casts the shadow of city-oriented theory on cooperative relations between urban and rural areas.Mutual separation between urban and rural settlements and independent development trigger off a range of social problems.We must undertake guidance through rational development path of urban-rural integration,to eliminate the phenomenon of urban-rural dual structure,and promote the sustainable development of population,resources and environment in urban and rural areas as soon as possible.展开更多
The clustered regularly interspaced short palindromic repeats(CRISPR)–CRISPR-associated protein(Cas) system has been widely used for genome editing. In this system, the cytosine base editor(CBE) and adenine base edit...The clustered regularly interspaced short palindromic repeats(CRISPR)–CRISPR-associated protein(Cas) system has been widely used for genome editing. In this system, the cytosine base editor(CBE) and adenine base editor(ABE) allow generating precise and irreversible base mutations in a programmable manner and have been used in many different types of cells and organisms. However, their applications are limited by low editing efficiency at certain genomic target sites or at specific target cytosine(C) or adenine(A) residues. Using a strategy of combining optimized synergistic core components, we developed a new multiplex super-assembled ABE(sABE) in rice that showed higher base-editing efficiency than previously developed ABEs. We also designed a new type of nuclear localization signal(NLS) comprising a FLAG epitope tag with four copies of a codon-optimized NLS(F4NLS^(r2)) to generate another ABE named F4NLS-sABE. This new NLS increased editing efficiency or edited additional A at several target sites. A new multiplex super-assembled CBE(sCBE) and F4NLS^(r2) involved F4NLS-sCBE were also created using the same strategy. F4NLS-sCBE was proven to be much more efficient than sCBE in rice. These optimized base editors will serve as powerful genome-editing tools for basic research or molecular breeding in rice and will provide a reference for the development of superior editing tools for other plants or animals.展开更多
The demonstration effect triggered by the construction of Zhejiang's characteristic towns has attracted attention and learning from all over the country,and has set off a boom in building characteristic towns acro...The demonstration effect triggered by the construction of Zhejiang's characteristic towns has attracted attention and learning from all over the country,and has set off a boom in building characteristic towns across the country. Under the dual constraints of industrial development and resource intensive use,the undeveloped areas of central China must find suitable development paths for characteristic towns. Taking Yichun City as an example,this article analyzes the advantages of Yichun City for developing characteristic towns combining its natural and economic conditions. In addition,the characteristic town development paths,such as vigorously promoting the construction of urban facilities,highlighting the characteristics relying on existing small towns,constructing an industrial chain of " ecology + leisure",highlighting cultural charm,and improving development grade,are proposed to provide useful reference for the development of characteristic towns in this type of underdeveloped cities in central China.展开更多
Through interpreting significance of low-carbon landscape, and analyzing common problems in landscape design industry, paths of low-carbon landscape design were explored from the following perspectives: establishing l...Through interpreting significance of low-carbon landscape, and analyzing common problems in landscape design industry, paths of low-carbon landscape design were explored from the following perspectives: establishing low-carbon index system for the landscape construction of eco-city; constructing scientific and reasonable spatial layout; using landscapes to interpret low-carbon concepts; enhancing the carbon sink function of urban green spaces; choosing reasonable landscape materials; reducing landscape maintenance cost. The study aims at applying low-carbon concepts in all design projects to achieve sustainable development of urban landscapes.展开更多
Jinchang City, a city with scarce water resources, has developed through 32 years of efforts from a small town in the Gobi desert into a medium modern city, and green coverage ratio of the downtown area has risen from...Jinchang City, a city with scarce water resources, has developed through 32 years of efforts from a small town in the Gobi desert into a medium modern city, and green coverage ratio of the downtown area has risen from 2.6% before the founding of the city to 36.11%. This paper summarized the measures adopted by Jinchang City for building national garden city.展开更多
As a new light spot and form of current agricultural development,the sixth industry is a new way to solve the problems of rural development.This paper first introduced current situations of the development of the sixt...As a new light spot and form of current agricultural development,the sixth industry is a new way to solve the problems of rural development.This paper first introduced current situations of the development of the sixth industry in Jingzhou of Hubei Province,analyzed the related problems,and then came up with some feasible development paths.First of all,the local government should formulate the financial support policies for the sixth industry.Second,local government should focus on strengthening the cultivation of new type of agricultural business entities and carrying out agricultural brand strategy.Finally,local government should develop leisure agriculture,ecological agriculture and promote the integration of rural tourism in the whole region.展开更多
In the context of the new urbanization,the characteristic town,as a new hotspot to developing rapidly to explore the industry,humanities,community integration town model,a urbanization and high-tech industry developme...In the context of the new urbanization,the characteristic town,as a new hotspot to developing rapidly to explore the industry,humanities,community integration town model,a urbanization and high-tech industry development booster,by the government and developers attention.At the same time,the green development model applies to the characteristic town of industrial upgrading and transformation,guiding the future characteristic town of green economic industry development direction.This paper studies the green development model of the characteristic town,and puts forward the implementation of the green industry through the greening industry structure,promoting green consumption and optimizing the green management.展开更多
As the largest manufacturing country,China is striving to improve the development quality of its power industry with the goal of Carbon Peaking and Carbon Neutrality,in order to sustain its high-quality economic growt...As the largest manufacturing country,China is striving to improve the development quality of its power industry with the goal of Carbon Peaking and Carbon Neutrality,in order to sustain its high-quality economic growth.In this regard,it is of importance to reveal both the regional development level of China’s power sector and its characteristics in terms of inspiring the next improvement direction.Motived by this purpose,this paper constructs an evaluation indicator system from three dimensions at the province level based on the connotation of high-quality development of the power industry(HDPI).Next,it calculates the HDPI indexes of 30 provinces and explore their development trend and spatial pattern.The results indicate that the total comprehensive performance of all regions was improved in general in the recent decade,but the spatial distribution characteristics of clean,low-carbon,safe and efficient are different.In the aspects of improvement space in future,not only do actively ameliorate the related management regimes or technical fields so as to improve the corresponding indicators’value,but also passively rely on the macro-development such as China’s urbanization level improvement,technological level improvement,and industrial structure upgrading as usual.展开更多
文摘China is carving out a distinctive development path which features urban-rural integration.This approach has not only yielded tangible results domestically but also drawn the attention of other countries.
文摘Against the backdrop of digital transformation,the agricultural digital economy is showing promising development trends,yet it also faces numerous challenges that hinder its high-quality growth.To align with the requirements of agricultural digital transformation in the new era,it is necessary to accelerate the construction of digital infrastructure,create a favorable industrial environment,enhance the overall quality of the workforce,and implement a comprehensive approach to elevate the development level of the agricultural digital economy,thereby driving the high-quality development of modern agriculture.This article focuses on the development of the agricultural digital economy,summarizes relevant policies and practical pathways,and aims to provide references for related theories and practices.
基金General Project of Philosophy and Social Sciences Research in Universities of Jiangsu Province,2024(2024SJYB1650).
文摘Under the background of"Digital Commerce for Rural Vitalization",rural E-commerce has experienced rapid development.However,agricultural products like strawberries,often produced by small-scale,fragmented,and less competitive individual farmers,struggle to meet the compliance and scalability demands of E-commerce,thereby constraining high-quality local economic development.Aiming to address this issue,this paper,guided by relevant policies and strategies,employs case analysis and logical deduction to explore the industrialization path of the"Cooperative+E-commerce"model for the strawberry industry.The research finds that by optimizing the cooperative's organizational structure,implementing multi-channel E-commerce strategies,upgrading the supply chain(including cold chain and quality traceability),and engaging in collaborative brand building,a robust industrial system can be formed.Supplemented by benefit evaluation,policy support,and regulatory oversight,this system can effectively bridge small-scale production with the broader market.This study concludes that this pathway can enhance the added value of the strawberry industry,increase farmer incomes,and provide practical insights for promoting high-quality local economic development.
基金funded by the 2025 Municipal Education Science Planning Project(202418966)the 2024 University Research Project of the Guangzhou Municipal Education Bureau(2024312155,2024312416)+2 种基金the 2024 Guangzhou Higher Education Teaching Quality and Teaching Reform Project(2024XWSJJD008)Project of the Department of Education of Guangdong Province(2022WTSCX089)Guangdong Provincial Department of Education General Higher Education Accreditation Research Project(2022WTSCX090).
文摘Against the background of the integration of the digital economy and industrial intelligence,AI technology has become the core support for the logistics industry to reduce costs,improve efficiency,and break through development bottlenecks.This paper constructs a research framework of“Application Scenarios-Transformation Mechanism-Challenges-Development Path,”systematically analyzing the application value and practical issues of AI in the logistics industry.The core applications of AI are concentrated in three scenarios:intelligent customer service,logistics data analysis and decision optimization,and intelligent inventory management.Through process automation replacement,service model upgrading,and data-driven decision-making,it achieves a systematic transformation of industry operational efficiency improvement,customer experience optimization,and decision-making model transformation.At the same time,AI applications still face practical challenges such as insufficient technical integration compatibility,data security and privacy protection risks,and talent structure adaptation gaps.In the future,the logistics industry needs to fully release the value of AI technology by deepening the integration of AI with cross-technologies,promoting green and flexible development.
基金support from the National Natural Science Foundation of China[Grant No.71874121,No.71671121 and No.71431005]the support from the National Key R&D Programme of China[Grant No.2018YFC0704400]+1 种基金the support from Major Projects of the National Social Science Fund of China[Grant No.17ZDA065]the support from the General Project of the Humanities and Social Science Fund of the Chinese Ministry of Education[Grant No.21YJA630023].
文摘With the proposed carbon-neutrality targets,intermittent renewable energy will become increasingly significant for the power sector in the future.It is vital to study its development paths,particularly for wind power and photovoltaics,while considering constraints on diffusion potential.Using learning curves,dynamic programming,and Bass models,this study analyzes technological diffusion trends to determine the most cost-effective development route for intermittent renewable energy power generation in China by 2060.This study simplifies reality by examining the individual diffusion processes of wind and photovoltaic power,focusing on the self-diffusion characteristics of the two technologies.The study assumes that self-diffusion is the primary driver of future development and describe the influence of multiple factors.The study finds that supportive policies are key drivers of development in the early stages of intermittent renewable energy deployment,especially for photovoltaics.The current diffusion scale of photovoltaics has a greater positive impact on its future development than that of wind power due to lower costs.In the long term,the phased goal for 2030 is projected to be met ahead of schedule,and the majority of future intermittent renewable energy output is expected to come from photovoltaics.The rapid development phases of photovoltaic and wind power conclude at similar times,but the maximum diffusion potential of photovoltaics is higher than that of wind power.Investment constraints and technological levels affect the initial and middle phases of the development path,but their effects are limited.The capacity of the power grid remains the key constraint in the entire research field.
基金supported by the National Natural Science Foundation of China(Grant Nos.51927808 and 41630642)the Postgraduate Innovation Fund Project of Hunan Province(Grant No.CX20200242).
文摘During the development blasting of circular tunnels, the detonation of multiple blastholes arranged onconcentric circles induces a complex dynamic response in the surrounding rocks. This process involvesmultiple blast loadings, static stress unloadings, and stress redistributions. In this study, the dynamicstresses of the surrounding rocks during development blasting, considering multiple blasting-unloadingstages with exponential paths and triangular paths (linear simplified paths of exponential paths), aresolved based on the dynamic theory and the Fourier transform method. Then, a corresponding discreteelement model is established using particle flow code (PFC). The multiple-stage dynamic stress andfracture distribution under different in situ stress levels and lateral coefficients are investigated. Theoreticalresults indicate that the peak compressive stresses in the surrounding rocks induced by bothtriangular and exponential paths are equal, while the triangular path generates greater additional dynamictensile stresses, particularly in the circumferential direction, compared to the exponential path.Numerical results show that the exponential path causes less dynamic circumferential tensile damageand forms fewer radial fractures than the triangular path in the first few blast stages;conversely, itexacerbates the damage and instability in the final blasting-unloading stage and forms more circumferentialfractures. Furthermore, the in situ stress determines which of the two opposite effects isdominant. Therefore, when using overly simplified triangular paths to evaluate the stability of surroundingrocks, potential overestimation or underestimation caused by different failure mechanismsshould be considered. Specifically, under high horizontal and vertical stresses, the static stress redistributionwith layer-by-layer blasting suppresses dynamic circumferential tensile and radial compressivedamage. The damage evolution of surrounding rocks in multi-stage blasting under different in situstresses is summarized and classified according to the damage mechanism and characteristics, which canguide blasting and support design.
基金2025 College Students'Innovation and Entrepreneurship Training Plan Project:“Yinong Zhixing-Smart Agriculture Platform Helps Rural Revitalization”innovative research2024 College Students'Innovation and Entrepreneurship Training Plan Project:The Implementation of the Digital Economy in Promoting Rural Revitalization(Project number:202413207025)。
文摘With the continuous advancement of big data technology,its application in precision agriculture is becoming more and more extensive,which provides a new path for agricultural modernization.Based on the background of big data technology,this paper discusses the development path of precision agriculture.The research shows that the application of big data technology in precision agriculture is mainly reflected in crop growth monitoring and prediction,soil fertility assessment and regulation,water resources management and optimization,agricultural product traceability and origin tracing,and agricultural product supply chain management and risk control.However,the application of big data technology in the agricultural field stll encounters numerous challenges,such as data collection and processing,data analysis and application,and privacy protection and security.To this end,this paper puts forward countermeasures,including strengthening infrastructure construction and establishing data sharing and management mechanisms.
文摘In October 2024,at the 27th ChinaASEAN Leaders'Meeting,the leaders of China and ten ASEAN nations announced the substantial conclusion of the China-ASEAN FTA 3.0 Upgrade Negotiations,and proposed that the two sides would strive to formally sign in 2025 the Protocol on Further Upgrading the China-ASEAN Comprehensive Economic Cooperation Framework Agreement and pertinent agreements under the Agreement.
基金Study on the Coordinated Innovation of Agricultural Knowledge Under the Perspective of Industrial Chain,One of the Periodical Achievements of Strategic Research Program for the Science and Technology Development of Tianjin City(15ZLZLZF00210)Study on the Evolution Path and Scientific and Technological Supporting System of Agriculture of Appropriate Scale Based on Heterogeneous Farmers,One of the Periodical Achievements of Strategic Research Program for the Science and Technology Development of Tianjin City(15ZLZLZF00390)~~
文摘With the low-carbon coordinated development in Beijing-Tianjin-Hebei Region as the starting point, the necessity and realistic difficulties in achieving the lowcarbon coordination in Beijing-Tianjin-Hebei Region was analyzed, based on which we constructed the systematic analytical framework for low-carbon coordination in Beijing-Tianjin-Hebei Region, and proposed the development path of regional lowcarbon coordinated development from the three levels of government, industry and consumer with the aim to provide specific references for the low-carbon coordinated development in Beijing-Tianjin-Hebei Region.
文摘This work takes the 36 cities from China＇s low-carbon pilot project as the research object and uses the carbon emission per capita and GDP per capita to categorize the 36 cities into four types to reveal their low-carbon development status; these four types are leading cities, developing cities, latecomer cities, and exploring cities. On the basis of an index system that quantitatively describes low-carbon development, this research analyzes the characteristics, development trends, and low-carbon development pathways of the four types of cities. According to the present situation and objectives of national emissions and considering the differences in development stages, challenges, and opportunities for each type of the city, this research presents recommendations for the low-carbon roadmap and the medium- and long-term （by 2030） emission trend routes of different types of regions in China.
基金Supported by Key Research Base Foundation of Research Center for Information Industry Development of Shaanxi ProvinceProject of Shaanxi Provincial Department of Education(11JK0053)
文摘The urban and rural areas are regarded as two major components of the regional economic system.Only through joint balanced development of the two can we achieve overall economic optimization and social welfare maximization.But the great social division of labor has separated urban areas from rural areas,which casts the shadow of city-oriented theory on cooperative relations between urban and rural areas.Mutual separation between urban and rural settlements and independent development trigger off a range of social problems.We must undertake guidance through rational development path of urban-rural integration,to eliminate the phenomenon of urban-rural dual structure,and promote the sustainable development of population,resources and environment in urban and rural areas as soon as possible.
基金supported by the Beijing Scholars Program[BSP041]。
文摘The clustered regularly interspaced short palindromic repeats(CRISPR)–CRISPR-associated protein(Cas) system has been widely used for genome editing. In this system, the cytosine base editor(CBE) and adenine base editor(ABE) allow generating precise and irreversible base mutations in a programmable manner and have been used in many different types of cells and organisms. However, their applications are limited by low editing efficiency at certain genomic target sites or at specific target cytosine(C) or adenine(A) residues. Using a strategy of combining optimized synergistic core components, we developed a new multiplex super-assembled ABE(sABE) in rice that showed higher base-editing efficiency than previously developed ABEs. We also designed a new type of nuclear localization signal(NLS) comprising a FLAG epitope tag with four copies of a codon-optimized NLS(F4NLS^(r2)) to generate another ABE named F4NLS-sABE. This new NLS increased editing efficiency or edited additional A at several target sites. A new multiplex super-assembled CBE(sCBE) and F4NLS^(r2) involved F4NLS-sCBE were also created using the same strategy. F4NLS-sCBE was proven to be much more efficient than sCBE in rice. These optimized base editors will serve as powerful genome-editing tools for basic research or molecular breeding in rice and will provide a reference for the development of superior editing tools for other plants or animals.
基金Supported by "the Twelfth Five-Year Plan" of Jiangxi Provincial Social Sciences Program(15GL37)
文摘The demonstration effect triggered by the construction of Zhejiang's characteristic towns has attracted attention and learning from all over the country,and has set off a boom in building characteristic towns across the country. Under the dual constraints of industrial development and resource intensive use,the undeveloped areas of central China must find suitable development paths for characteristic towns. Taking Yichun City as an example,this article analyzes the advantages of Yichun City for developing characteristic towns combining its natural and economic conditions. In addition,the characteristic town development paths,such as vigorously promoting the construction of urban facilities,highlighting the characteristics relying on existing small towns,constructing an industrial chain of " ecology + leisure",highlighting cultural charm,and improving development grade,are proposed to provide useful reference for the development of characteristic towns in this type of underdeveloped cities in central China.
基金Supported by Soft Science of Research Program of Tianjin Municipal Construction System (2012–Soft5)
文摘Through interpreting significance of low-carbon landscape, and analyzing common problems in landscape design industry, paths of low-carbon landscape design were explored from the following perspectives: establishing low-carbon index system for the landscape construction of eco-city; constructing scientific and reasonable spatial layout; using landscapes to interpret low-carbon concepts; enhancing the carbon sink function of urban green spaces; choosing reasonable landscape materials; reducing landscape maintenance cost. The study aims at applying low-carbon concepts in all design projects to achieve sustainable development of urban landscapes.
文摘Jinchang City, a city with scarce water resources, has developed through 32 years of efforts from a small town in the Gobi desert into a medium modern city, and green coverage ratio of the downtown area has risen from 2.6% before the founding of the city to 36.11%. This paper summarized the measures adopted by Jinchang City for building national garden city.
文摘As a new light spot and form of current agricultural development,the sixth industry is a new way to solve the problems of rural development.This paper first introduced current situations of the development of the sixth industry in Jingzhou of Hubei Province,analyzed the related problems,and then came up with some feasible development paths.First of all,the local government should formulate the financial support policies for the sixth industry.Second,local government should focus on strengthening the cultivation of new type of agricultural business entities and carrying out agricultural brand strategy.Finally,local government should develop leisure agriculture,ecological agriculture and promote the integration of rural tourism in the whole region.
基金supported by the Project for Master Degree Candidate at Guizhou University of Finance and Economics(Grant No.2017YAN128)
文摘In the context of the new urbanization,the characteristic town,as a new hotspot to developing rapidly to explore the industry,humanities,community integration town model,a urbanization and high-tech industry development booster,by the government and developers attention.At the same time,the green development model applies to the characteristic town of industrial upgrading and transformation,guiding the future characteristic town of green economic industry development direction.This paper studies the green development model of the characteristic town,and puts forward the implementation of the green industry through the greening industry structure,promoting green consumption and optimizing the green management.
基金This work was supported by National Natural Science Foundation of China[Grant number.71673034]Postdoctoral Research Foundation of China[Grant number.2021M692654]+1 种基金Natural Science Basic Research Program of Shaanxi Province[Grant number.2020JQ282]Social Science Foundation of Shaanxi Province[Grant number.2020R042].
文摘As the largest manufacturing country,China is striving to improve the development quality of its power industry with the goal of Carbon Peaking and Carbon Neutrality,in order to sustain its high-quality economic growth.In this regard,it is of importance to reveal both the regional development level of China’s power sector and its characteristics in terms of inspiring the next improvement direction.Motived by this purpose,this paper constructs an evaluation indicator system from three dimensions at the province level based on the connotation of high-quality development of the power industry(HDPI).Next,it calculates the HDPI indexes of 30 provinces and explore their development trend and spatial pattern.The results indicate that the total comprehensive performance of all regions was improved in general in the recent decade,but the spatial distribution characteristics of clean,low-carbon,safe and efficient are different.In the aspects of improvement space in future,not only do actively ameliorate the related management regimes or technical fields so as to improve the corresponding indicators’value,but also passively rely on the macro-development such as China’s urbanization level improvement,technological level improvement,and industrial structure upgrading as usual.
