<Abstract>The thesis profiles and explains the significant changes that have taken place in China's regional development patterns since the inception of its economic reform and opening three decades ago.The ...<Abstract>The thesis profiles and explains the significant changes that have taken place in China's regional development patterns since the inception of its economic reform and opening three decades ago.The analysis show that prior to the reform China's spatial development pattern was characterized by the dominance of the three municipalities and the Northeast,as well as by both the coast-interior and the north-south disparities.After three decades of reform,regional development has become multi-centered with South China,the Yangtze Delta and the Beijing-Tianjin area being the three most important regions of the country.The coastal provinces as a whole rose to prominence on China's economic map while the Northeast has diminished its clout.The coast-interior gap not only remains but may have widened.And especially in the latest ten years,the economic map continue changing,some provinces rose up quickly,while some declined rapidly.The paper discusses main specific factors that have reshaped China's spatial development patterns.展开更多
The study profiles and explains the significant changes that have taken place in China's spatial development patterns since the inception of its economic reform and opening two decades ago. Principal component an...The study profiles and explains the significant changes that have taken place in China's spatial development patterns since the inception of its economic reform and opening two decades ago. Principal component analysis is used to delineate spatial patterns. The analyses show that prior to the reform China's spatial development pattern was characterized by the dominance of the three municipalities and the Northeast, as well as by both the coast-interior and the north-south disparities. Northern provinces were generally more industrialized and economically powerful than the southern ones. After two decades of reform, regional development has become multi-centered with South China, the Yangtze Delta and the Beijing-Tianjin area being the three most important regions of the country. The coastal provinces as a whole rose to prominence on China's economic map while the Northeast has diminished its clout. The coast-interior gap not only remains but may have widened. The north-south disparity also still exists but there has been a role reversal with the south now in the lead position. Virtually all inland provinces now find themselves at or near the low end of the development spectrum. We argue that the major reason for the recent shifts in Chinese space economy is the spatially differentiated economic growth resulted from the reform and open door policy and from the new, uneven development strategy adopted by the Chinese government. The paper discusses four specific factors that have reshaped China's spatial development patterns.展开更多
China's megacities are undergoing a critical transition from incremental expansion to stock optimization in order to achieve high-quality spatial development.However,the complex interactions among land use,populat...China's megacities are undergoing a critical transition from incremental expansion to stock optimization in order to achieve high-quality spatial development.However,the complex interactions among land use,population,and economy involved in this transition remain underexamined,particularly with respect to human-land relationships in suburban areas.From an incremental-stock-decremental perspective,this paper develops a construction land-population vitality discriminant matrix.Using land use data(CNLUCC),population data(World Pop),and nighttime light data(DMSP-OLS),the paper examines the spatiotemporal characteristics of human-land spatial development patterns in Beijing's suburban areas from 2000 to 2020 and analyzes the underlying formation mechanisms across different periods.The findings show that:(1)From 2000 to 2020,land use in Beijing's suburban areas shifted from incremental expansion to quantitative reduction and qualitative improvement,while population vitality continued to increase and was not constrained by a reduction in land supply.(2)The suburban plain area,strongly influenced by the central city,evolved from free-form expansion to preferential point-like incremental development.In contrast,the ecological conservation zone exhibited the coexistence of incremental and decremental spaces,with population vitality growing increasingly stronger.The suburban areas gradually formed an urban-rural integration pattern in which urban areas led rural development,and the plain area facilitated the development of the ecological conservation zone.(3)Incremental development was primarily shaped by urban master plans and major project initiatives.Incremental-contraction patterns reflect human-land mismatches resulting from uncontrolled sprawl,disorderly construction,and population outflow.Decremental development was mainly driven by land reduction policies,including the demolition of illegal structures,the phasing-out of inefficient industrial land,and pilot programs for intensive land use.Decremental-growth patterns,supported by intensive land use and collective land marketization policies,contributed to a more balanced human-land relationship and fostered high-quality economic and population growth.This paper highlights the critical role of policy-driven strategies in guiding sustainable urban development and enhances our understanding of how to achieve efficient and balanced human-land development in suburban areas.It offers insights applicable to other megacities undergoing similar transitions.展开更多
China has achieved the poverty reduction goal of the United Nations 2030 Agenda for Sustainable Development 10 years ahead of schedule,contributing significantly to global poverty reduction.Despite extended efforts in...China has achieved the poverty reduction goal of the United Nations 2030 Agenda for Sustainable Development 10 years ahead of schedule,contributing significantly to global poverty reduction.Despite extended efforts in poverty elimination,there is a lack of quantitative studies categorizing and comparing poverty-elimination counties(PECs)based on their processes.This study proposes an innovative framework for analyzing PECs’development paths from the perspective of population-land-industry(PLI).We quantify the PLI matching degree of PECs in China during the critical phase of the battle against poverty through a multivariate matching model,classify PECs via K-means clustering according to the consistency in PLI matching degree evolution,and summarize the typical development patterns of PECs.Results indicate that the PLI matching degree of PECs in China increased substantially from 2015 to 2020,particularly in eastern areas,while the western region,including the Qinghai-Xizang Plateau and southwestern Xinjiang,shows untapped potential for improvement.Five types of PECs are identified,with the majority(30.1%)showing sustained moderate PLI matching and a minority(9.6%)experiencing long-term PLI mismatch.Industry is the shortfall of various PECs,and effective strategies to facilitate all types of PECs include the development of emerging businesses and the expansion of secondary and tertiary industries.Additionally,enriching rural labor force and increasing farmland use efficiency are essential for optimal PLI matching and positive interaction,ultimately ensuring poverty elimination and sustainable development.展开更多
Considering some advantages of Rana nigromaculata as an experimental species, we propose that this species, like Xenopus laevis, could be used to assay thyroid hormone（TH） signaling disrupting actions. To validate t...Considering some advantages of Rana nigromaculata as an experimental species, we propose that this species, like Xenopus laevis, could be used to assay thyroid hormone（TH） signaling disrupting actions. To validate the utilizability of R. nigromaculata, we investigated the responsiveness of R. nigromaculata to a TH receptor（TR） agonist（T3） and antagonist（amiodarone） by analyzing expression, based on characterizing TR cDNA and developmental expression patterns. With high levels of identity with the corresponding genes in X. laevis, both TRα and TRβ in R. nigromaculata exhibited roughly similar developmental expression patterns to those of X. laevis, in spite of some species-specific differences. Both TRα and TRβ expression had greater changes in the liver and intestine than in the tail and brain during metamorphosis. T3 exposure for 2 days induced more dramatic increases of TRβ expression in stage 27 than in stage34 tadpoles but not in stage 42 tadpoles, showing that the responsiveness of R. nigromaculata to TH decreased with development and disappeared at the onset of metamorphic climax.Corresponding to greater changes of TRβ expression in the liver and intestine than in the tail and brain during metamorphosis, the liver and intestine had higher responsiveness to exogenous T3 than the tail and brain. Amiodarone inhibited T3-induced TRβ expression. Our results show that R. nigromaculata can be used as a model species for assaying TH signaling disrupting actions by analyzing TRβ expression, and intestine tissues at stage 27 are ideal test materials due to high responsiveness and easy accessibility.展开更多
China is one of the countries with the longest history in the world.The protection and development of historical and cultural resources is an issue worthy of attention in the fields of economic geography and urban-rur...China is one of the countries with the longest history in the world.The protection and development of historical and cultural resources is an issue worthy of attention in the fields of economic geography and urban-rural planning at the present stage.This study takes the Zhongyuan Urban Agglomeration,which is rich in historical and cultural heritage,as a specific case,analyzes the characteristics of the spatial-temporal distribution pattern of its historical and cultural resources.The results show that the distribution structure of historical and cultural element resources within the Zhongyuan Urban Agglomeration presents significant regional agglomeration and combination characteristics.In response to the analysis results,the study formulates an optimization strategy for the regional development pattern supported by the protection and development of historical and cultural resources,and initially proposes a matching spatial development pattern plan and policy recommendations for coordinated development.展开更多
Mineral resources in Asia continent and its mining industry play a significant role in the economic growth and industrialization of both Asia and the world.Asia continent boasts the most comprehensive kinds of mineral...Mineral resources in Asia continent and its mining industry play a significant role in the economic growth and industrialization of both Asia and the world.Asia continent boasts the most comprehensive kinds of minerals,with reserves of at least 38 of over 80 widely used minerals worldwide accounting for more than30%of the global total reserves.Asia continent experienced three main tectonic evolution and mineralization stages:The Precambrian,the Paleozoic,and the Mesozoic to Cenozoic.The abundant mineral resources in this continent can be divided into seven first-order metallogenic belts(metallogenic domains),18 second-order metallogenic belts(metallogenic provinces),61 third-order metallogenic belts(metallogenic zones),and nine main minerogenetic series.Asia continent exhibits the most significant metallogenic specialization among all continents.Specifically,granite belts of Asia continent manifest pronounced metallogenic specialization of tin,rare metals,and porphyry Cu-Au-Mo deposits.Its maficultramafic rock belts and ophiolite belts display notable metallogenic specialization of lateritic nickel deposits and magmatic type chromite deposits,while its Mesozoic to Cenozoic basalt belts show remarkable metallogenic specialization of lateritic bauxite deposits.Consequently,many giant metallogenic belts were formed,including the Southeast Asian tin belt,the Qinghai-Xizang Plateau rare metal metallogenic belt,the Tethyan porphyry Cu-Au-Mo metallogenic belt,the circum-Pacific porphyry Cu-Au-Mo metallogenic belt,the Southeast Asian lateritic bauxite metallogenic belt,the Deccan Plateau lateritic bauxite metallogenic belt in India,the Southeast Asian lateritic nickel metallogenic belt,and the Tethyan magmatic type chromite metallogenic belt—all of which are significant metallogenic belts in Asia continent.Future mineral exploration in Asia should focus primarily on the Precambrian mineralization of ancient cratons,the Paleozoic mineralization of the Central Asian-Mongolian orogenic belt,and the Mesozoic to Cenozoic mineralization of the Tethyan and circum-Pacific mobile belts.Asia's mining industry not only underpins its own economic growth but also propels global economic development and industrialization,contributing significantly to the world economy.Asia boasts the highest production value of minerals,the largest annual production of minerals,and the greatest trade value of mineral products among all the continents,having emerged as the trade center of global mineral products and the center of the mining industry economy.China is identified as one of the few countries that possess the most comprehensive kinds of minerals,and its mining industry has supported and driven the economic development and industrialization of Asia and even the world.Standing as the largest mineral producer worldwide,China ranked first in the production of 28 mineral commodities in the world in 2022.Besides,China exhibits the highest annual production value of minerals and the largest trade value of mineral products among all countries.Therefore,China's demand for global mineral products influences the global supply and demand patterns of minerals and the world economic situation.展开更多
The Hedgehog(HH)family includes Indian(IHH),Desert(DHH),and Sonic Hedgehog(SHH).Proteins of the HH family are distinguished by their function as morphogens,i.e.,molecules that regulate the pattern of tissue developmen...The Hedgehog(HH)family includes Indian(IHH),Desert(DHH),and Sonic Hedgehog(SHH).Proteins of the HH family are distinguished by their function as morphogens,i.e.,molecules that regulate the pattern of tissue development in accordance with concentration gradient.Data accumulated over the years clearly demonstrate that HH signaling is essential in myelination,particularly in the life cycle of the oligodendrocyte lineage.展开更多
Global industrial chains(GICs)have become a hallmark of the world economy underpinning the global production cycle.Since the reform and opening up was introduced in 1978,China has taken an active role in global value ...Global industrial chains(GICs)have become a hallmark of the world economy underpinning the global production cycle.Since the reform and opening up was introduced in 1978,China has taken an active role in global value chains(GVCs)and become the world’s factory floor.Under the external shocks to GICs,such as US trade frictions with China and the COVID-19 pandemic,China’s traditional comparative advantages in manufacturing which include its labor force and costs are waning.This has manifested in a wave of industrial relocations from China to other countries as well as China’s weakening international competitiveness.We took stock of the concepts and journey of GVCs and elaborated the intrinsic relationship between GVCs and the new development pattern of“dual circulations”.We also analyzed the trends of GVCs,the current status and problems of China’s industrial chains,and China’s market heft,complete industrial chains and the digital economy as new strengths for industrial chain upgrade.In our conclusion,this paper put forth some policy recommendations for China’s industrial chain upgrade in the context of dual circulations.展开更多
The development pattern, development situation, and existing problems of land exploitation in Zigui County, Three Gorges Reservoir Areas of China were presented. The sustainable development mode and its strategy in th...The development pattern, development situation, and existing problems of land exploitation in Zigui County, Three Gorges Reservoir Areas of China were presented. The sustainable development mode and its strategy in the Three Gorges Reservoir Areas was also discussed. A sustainable development framework for low mountain regions, middle mountain regions and high mountain regions was developed, and management countermeasures for structural optimization of complex ecosystems were advanced.展开更多
Development status and five principal practice modes of ecological cycling agriculture are introduced,such as the quantitative reduction mode with the characteristics of fertilizer reduction and clean production,the e...Development status and five principal practice modes of ecological cycling agriculture are introduced,such as the quantitative reduction mode with the characteristics of fertilizer reduction and clean production,the ecological chain connection and conversion mode including the combination of farming and grazing and the new mode of farming,the agricultural waste recycling mode with biogas as a link and the comprehensive utilization of waste,quality enhancement mode of agricultural products,and eco-cycle mode of agricultural park.Based on the analysis of the socio-economic characteristic environment of these modes,corresponding policy suggestions are put forward in order to promote the development of circular agriculture,such as improving the macro-control mechanism led by the government,promoting the construction of technological innovation system of ecological circular agriculture,and creating the atmosphere for circular agriculture development.展开更多
"Three new developments"is the guiding ideology of Chinese-style high-quality development in the new era.Jujube(Zizyphus jujube Mill.)is a plant of Zizyphus of Rhamnaceae,which originated in China and has be..."Three new developments"is the guiding ideology of Chinese-style high-quality development in the new era.Jujube(Zizyphus jujube Mill.)is a plant of Zizyphus of Rhamnaceae,which originated in China and has been listed as one of the"five fruits"since ancient times.Xinjiang is the most important jujube producing area in China,and its yield has accounted for 50%of the national jujube yield.In the five prefectures and cities of southern Xinjiang,as well as the regimental farms of southern and eastern Xinjiang of Xinjiang Production and Construction Corps,the jujube industry is an advantageous characteristic industry in agriculture.This paper studied Xinjiang jujube industry and its agricultural intellectual property resources,analyzed six major issues to be further implemented,such as the"three new developments"thinking and the strategy of building an intellectual property power,and puts forward eight strategies such as coordinating the two markets and two resources to accelerate the construction of a new development pattern and dual circulation of jujube.展开更多
This paper examines China’s flying geese paradigm that serves as a key driver of a new pattern of the country’s economic development.Our results suggest that such a major power’s flying geese paradigm has taken sha...This paper examines China’s flying geese paradigm that serves as a key driver of a new pattern of the country’s economic development.Our results suggest that such a major power’s flying geese paradigm has taken shape in the aftermath of the global financial crisis in 2008.However,this paradigm has provincial heterogeneity in that industrial relocation varies across provinces.For instance,China’s central and western regions have shown differences while serving as destinations for labor-intensive industries and processing trade.This flying geese paradigm evolves in a slow and nonlinear manner,and may be subject to stagnation and even reversal.展开更多
On the way to the construction of new countryside, Henan province has been exploring its own new construction development pattern actively. This paper analyzes the four development patterns-Xingyang mode, Zhongmou mod...On the way to the construction of new countryside, Henan province has been exploring its own new construction development pattern actively. This paper analyzes the four development patterns-Xingyang mode, Zhongmou mode,Xinmi mode and Gongyi mode --from the perspective of ecological civilization development on the basis of sufficient data and extensive research. This also concludes their experience to realize the sustainable development of the new construction of new countryside.展开更多
In order to achieve characteristic,high-quality,high-efficiency,low-consumption,healthy and intensive breeding,we use the ecology method to analyze the status quo of development of characteristic breeding industry in ...In order to achieve characteristic,high-quality,high-efficiency,low-consumption,healthy and intensive breeding,we use the ecology method to analyze the status quo of development of characteristic breeding industry in Guangxi,from advantages in resources,industrial development,characteristic breeding,and standardized construction.There are some problems existing in the development of characteristic breeding industry in Guangxi:prominent contradiction among human,land and grain;outdated breeding mode;low comprehensive utilization rate of resources;increasingly deteriorating ecological environment.We put forth the following recommendations:based on the ecological and economic principles,introducing"reduce,reuse,recycle"idea of circular economy;striving to choose the development pattern of circular economy adapting to local resource characteristics,planting and breeding habits;in terms of realization path,paying close attention to construction of standardized breeding farm,cultivation of organic fertilizer industry,infrastructure construction,environmental law enforcement,and other parts;reinforcing the policy guidance,adjusting and optimizing industrial structure,strengthening scientific and technological innovation,and advancing industrialization management,to promote steady development of circular economy of characteristic breeding industry in Guangxi,and accelerate the process of rejuvenating province by breeding industry,enriching the people and building up Guangxi.展开更多
The overall regional development planning pattern has been considered to be a new and effective pattern as for development of provincial economy.The article analyzed the current conditions of the west of Shandong Prov...The overall regional development planning pattern has been considered to be a new and effective pattern as for development of provincial economy.The article analyzed the current conditions of the west of Shandong Province and tried to find the generation mechanisms of current non-balanced economic development of Shandong Province.And then approaches to regional development were put forward according to the theory of regional development pattern as a whole.展开更多
Foeused on the lack of proper organization for patterns in the development of pattern based software, a POMSDP model with layered tree structure for organizing patterns during the process of development was put torwar...Foeused on the lack of proper organization for patterns in the development of pattern based software, a POMSDP model with layered tree structure for organizing patterns during the process of development was put torward. The model and its interrelated eoneepts were strictly defined and introduced by applying the theory of set, symbolie logic and pattern, which ensures the correctness, maturity and expansibility of the model. The expansibility of the model was discussed mainly. The basic realization and the application in the automatic query system were presented. Based on the existing software development methods, the POMSDP model resolves the problem of chaos in the application of patterns, strengthens the controllability of the system, and facilitates the improvement, maintenance, expansion, and especially the reengineering of the software system.展开更多
Tourism is one of the important industries in China. It has become China＇s important economic growth point. But from the development of tourist attractions in China, we find that many problems still exist, especially...Tourism is one of the important industries in China. It has become China＇s important economic growth point. But from the development of tourist attractions in China, we find that many problems still exist, especially the sources of funds. This will seriously impede the further development of tourism industry. Based on the analysis, related countermeasures have been set forth. And yet the best approach to resolve funding issues is financing.展开更多
文摘<Abstract>The thesis profiles and explains the significant changes that have taken place in China's regional development patterns since the inception of its economic reform and opening three decades ago.The analysis show that prior to the reform China's spatial development pattern was characterized by the dominance of the three municipalities and the Northeast,as well as by both the coast-interior and the north-south disparities.After three decades of reform,regional development has become multi-centered with South China,the Yangtze Delta and the Beijing-Tianjin area being the three most important regions of the country.The coastal provinces as a whole rose to prominence on China's economic map while the Northeast has diminished its clout.The coast-interior gap not only remains but may have widened.And especially in the latest ten years,the economic map continue changing,some provinces rose up quickly,while some declined rapidly.The paper discusses main specific factors that have reshaped China's spatial development patterns.
文摘The study profiles and explains the significant changes that have taken place in China's spatial development patterns since the inception of its economic reform and opening two decades ago. Principal component analysis is used to delineate spatial patterns. The analyses show that prior to the reform China's spatial development pattern was characterized by the dominance of the three municipalities and the Northeast, as well as by both the coast-interior and the north-south disparities. Northern provinces were generally more industrialized and economically powerful than the southern ones. After two decades of reform, regional development has become multi-centered with South China, the Yangtze Delta and the Beijing-Tianjin area being the three most important regions of the country. The coastal provinces as a whole rose to prominence on China's economic map while the Northeast has diminished its clout. The coast-interior gap not only remains but may have widened. The north-south disparity also still exists but there has been a role reversal with the south now in the lead position. Virtually all inland provinces now find themselves at or near the low end of the development spectrum. We argue that the major reason for the recent shifts in Chinese space economy is the spatially differentiated economic growth resulted from the reform and open door policy and from the new, uneven development strategy adopted by the Chinese government. The paper discusses four specific factors that have reshaped China's spatial development patterns.
基金supported by the National Natural Science Foundation of China(No.52478036,No.42301217)the Humanities and Social Science Fund of Ministry of Education of China(No.23YJAZH215)the Beijing Natural Science Foundation(No.8232002)。
文摘China's megacities are undergoing a critical transition from incremental expansion to stock optimization in order to achieve high-quality spatial development.However,the complex interactions among land use,population,and economy involved in this transition remain underexamined,particularly with respect to human-land relationships in suburban areas.From an incremental-stock-decremental perspective,this paper develops a construction land-population vitality discriminant matrix.Using land use data(CNLUCC),population data(World Pop),and nighttime light data(DMSP-OLS),the paper examines the spatiotemporal characteristics of human-land spatial development patterns in Beijing's suburban areas from 2000 to 2020 and analyzes the underlying formation mechanisms across different periods.The findings show that:(1)From 2000 to 2020,land use in Beijing's suburban areas shifted from incremental expansion to quantitative reduction and qualitative improvement,while population vitality continued to increase and was not constrained by a reduction in land supply.(2)The suburban plain area,strongly influenced by the central city,evolved from free-form expansion to preferential point-like incremental development.In contrast,the ecological conservation zone exhibited the coexistence of incremental and decremental spaces,with population vitality growing increasingly stronger.The suburban areas gradually formed an urban-rural integration pattern in which urban areas led rural development,and the plain area facilitated the development of the ecological conservation zone.(3)Incremental development was primarily shaped by urban master plans and major project initiatives.Incremental-contraction patterns reflect human-land mismatches resulting from uncontrolled sprawl,disorderly construction,and population outflow.Decremental development was mainly driven by land reduction policies,including the demolition of illegal structures,the phasing-out of inefficient industrial land,and pilot programs for intensive land use.Decremental-growth patterns,supported by intensive land use and collective land marketization policies,contributed to a more balanced human-land relationship and fostered high-quality economic and population growth.This paper highlights the critical role of policy-driven strategies in guiding sustainable urban development and enhances our understanding of how to achieve efficient and balanced human-land development in suburban areas.It offers insights applicable to other megacities undergoing similar transitions.
基金supported by the National Natural Science Foundation of China(Grants No.41931293,42271279,42293271,and 41801175).
文摘China has achieved the poverty reduction goal of the United Nations 2030 Agenda for Sustainable Development 10 years ahead of schedule,contributing significantly to global poverty reduction.Despite extended efforts in poverty elimination,there is a lack of quantitative studies categorizing and comparing poverty-elimination counties(PECs)based on their processes.This study proposes an innovative framework for analyzing PECs’development paths from the perspective of population-land-industry(PLI).We quantify the PLI matching degree of PECs in China during the critical phase of the battle against poverty through a multivariate matching model,classify PECs via K-means clustering according to the consistency in PLI matching degree evolution,and summarize the typical development patterns of PECs.Results indicate that the PLI matching degree of PECs in China increased substantially from 2015 to 2020,particularly in eastern areas,while the western region,including the Qinghai-Xizang Plateau and southwestern Xinjiang,shows untapped potential for improvement.Five types of PECs are identified,with the majority(30.1%)showing sustained moderate PLI matching and a minority(9.6%)experiencing long-term PLI mismatch.Industry is the shortfall of various PECs,and effective strategies to facilitate all types of PECs include the development of emerging businesses and the expansion of secondary and tertiary industries.Additionally,enriching rural labor force and increasing farmland use efficiency are essential for optimal PLI matching and positive interaction,ultimately ensuring poverty elimination and sustainable development.
基金supported by the Public Welfare Research Project for Environmental Protection (No. 201109048)the National High Technology Research and Development Program (863) of China (No. 2012AA06A302)the National Natural Science Foundation of China (No. 21077125)
文摘Considering some advantages of Rana nigromaculata as an experimental species, we propose that this species, like Xenopus laevis, could be used to assay thyroid hormone（TH） signaling disrupting actions. To validate the utilizability of R. nigromaculata, we investigated the responsiveness of R. nigromaculata to a TH receptor（TR） agonist（T3） and antagonist（amiodarone） by analyzing expression, based on characterizing TR cDNA and developmental expression patterns. With high levels of identity with the corresponding genes in X. laevis, both TRα and TRβ in R. nigromaculata exhibited roughly similar developmental expression patterns to those of X. laevis, in spite of some species-specific differences. Both TRα and TRβ expression had greater changes in the liver and intestine than in the tail and brain during metamorphosis. T3 exposure for 2 days induced more dramatic increases of TRβ expression in stage 27 than in stage34 tadpoles but not in stage 42 tadpoles, showing that the responsiveness of R. nigromaculata to TH decreased with development and disappeared at the onset of metamorphic climax.Corresponding to greater changes of TRβ expression in the liver and intestine than in the tail and brain during metamorphosis, the liver and intestine had higher responsiveness to exogenous T3 than the tail and brain. Amiodarone inhibited T3-induced TRβ expression. Our results show that R. nigromaculata can be used as a model species for assaying TH signaling disrupting actions by analyzing TRβ expression, and intestine tissues at stage 27 are ideal test materials due to high responsiveness and easy accessibility.
基金Major Program of National Fund of Philosophy and Social Science of China(24&ZD148).
文摘China is one of the countries with the longest history in the world.The protection and development of historical and cultural resources is an issue worthy of attention in the fields of economic geography and urban-rural planning at the present stage.This study takes the Zhongyuan Urban Agglomeration,which is rich in historical and cultural heritage,as a specific case,analyzes the characteristics of the spatial-temporal distribution pattern of its historical and cultural resources.The results show that the distribution structure of historical and cultural element resources within the Zhongyuan Urban Agglomeration presents significant regional agglomeration and combination characteristics.In response to the analysis results,the study formulates an optimization strategy for the regional development pattern supported by the protection and development of historical and cultural resources,and initially proposes a matching spatial development pattern plan and policy recommendations for coordinated development.
基金funded by geological survey project of China Geological Survey(DD20211404)。
文摘Mineral resources in Asia continent and its mining industry play a significant role in the economic growth and industrialization of both Asia and the world.Asia continent boasts the most comprehensive kinds of minerals,with reserves of at least 38 of over 80 widely used minerals worldwide accounting for more than30%of the global total reserves.Asia continent experienced three main tectonic evolution and mineralization stages:The Precambrian,the Paleozoic,and the Mesozoic to Cenozoic.The abundant mineral resources in this continent can be divided into seven first-order metallogenic belts(metallogenic domains),18 second-order metallogenic belts(metallogenic provinces),61 third-order metallogenic belts(metallogenic zones),and nine main minerogenetic series.Asia continent exhibits the most significant metallogenic specialization among all continents.Specifically,granite belts of Asia continent manifest pronounced metallogenic specialization of tin,rare metals,and porphyry Cu-Au-Mo deposits.Its maficultramafic rock belts and ophiolite belts display notable metallogenic specialization of lateritic nickel deposits and magmatic type chromite deposits,while its Mesozoic to Cenozoic basalt belts show remarkable metallogenic specialization of lateritic bauxite deposits.Consequently,many giant metallogenic belts were formed,including the Southeast Asian tin belt,the Qinghai-Xizang Plateau rare metal metallogenic belt,the Tethyan porphyry Cu-Au-Mo metallogenic belt,the circum-Pacific porphyry Cu-Au-Mo metallogenic belt,the Southeast Asian lateritic bauxite metallogenic belt,the Deccan Plateau lateritic bauxite metallogenic belt in India,the Southeast Asian lateritic nickel metallogenic belt,and the Tethyan magmatic type chromite metallogenic belt—all of which are significant metallogenic belts in Asia continent.Future mineral exploration in Asia should focus primarily on the Precambrian mineralization of ancient cratons,the Paleozoic mineralization of the Central Asian-Mongolian orogenic belt,and the Mesozoic to Cenozoic mineralization of the Tethyan and circum-Pacific mobile belts.Asia's mining industry not only underpins its own economic growth but also propels global economic development and industrialization,contributing significantly to the world economy.Asia boasts the highest production value of minerals,the largest annual production of minerals,and the greatest trade value of mineral products among all the continents,having emerged as the trade center of global mineral products and the center of the mining industry economy.China is identified as one of the few countries that possess the most comprehensive kinds of minerals,and its mining industry has supported and driven the economic development and industrialization of Asia and even the world.Standing as the largest mineral producer worldwide,China ranked first in the production of 28 mineral commodities in the world in 2022.Besides,China exhibits the highest annual production value of minerals and the largest trade value of mineral products among all countries.Therefore,China's demand for global mineral products influences the global supply and demand patterns of minerals and the world economic situation.
基金Spanish government(PID2022-143110OB-IOO)Merck Foundation(20234599)grants(to FdeCS)Univesidad Camilo Jose Cela(CEIDI_VI_08_06_XI_EMYDEM)grant(to MMF)。
文摘The Hedgehog(HH)family includes Indian(IHH),Desert(DHH),and Sonic Hedgehog(SHH).Proteins of the HH family are distinguished by their function as morphogens,i.e.,molecules that regulate the pattern of tissue development in accordance with concentration gradient.Data accumulated over the years clearly demonstrate that HH signaling is essential in myelination,particularly in the life cycle of the oligodendrocyte lineage.
文摘Global industrial chains(GICs)have become a hallmark of the world economy underpinning the global production cycle.Since the reform and opening up was introduced in 1978,China has taken an active role in global value chains(GVCs)and become the world’s factory floor.Under the external shocks to GICs,such as US trade frictions with China and the COVID-19 pandemic,China’s traditional comparative advantages in manufacturing which include its labor force and costs are waning.This has manifested in a wave of industrial relocations from China to other countries as well as China’s weakening international competitiveness.We took stock of the concepts and journey of GVCs and elaborated the intrinsic relationship between GVCs and the new development pattern of“dual circulations”.We also analyzed the trends of GVCs,the current status and problems of China’s industrial chains,and China’s market heft,complete industrial chains and the digital economy as new strengths for industrial chain upgrade.In our conclusion,this paper put forth some policy recommendations for China’s industrial chain upgrade in the context of dual circulations.
文摘The development pattern, development situation, and existing problems of land exploitation in Zigui County, Three Gorges Reservoir Areas of China were presented. The sustainable development mode and its strategy in the Three Gorges Reservoir Areas was also discussed. A sustainable development framework for low mountain regions, middle mountain regions and high mountain regions was developed, and management countermeasures for structural optimization of complex ecosystems were advanced.
基金Supported by the Scientific and Technological Innovation Capacity Improvement Programme of the Zhejiang Academy of Agricultural Sciences
文摘Development status and five principal practice modes of ecological cycling agriculture are introduced,such as the quantitative reduction mode with the characteristics of fertilizer reduction and clean production,the ecological chain connection and conversion mode including the combination of farming and grazing and the new mode of farming,the agricultural waste recycling mode with biogas as a link and the comprehensive utilization of waste,quality enhancement mode of agricultural products,and eco-cycle mode of agricultural park.Based on the analysis of the socio-economic characteristic environment of these modes,corresponding policy suggestions are put forward in order to promote the development of circular agriculture,such as improving the macro-control mechanism led by the government,promoting the construction of technological innovation system of ecological circular agriculture,and creating the atmosphere for circular agriculture development.
基金Supported by Youth Project of National Social Science Fund of China(22CMZ015)。
文摘"Three new developments"is the guiding ideology of Chinese-style high-quality development in the new era.Jujube(Zizyphus jujube Mill.)is a plant of Zizyphus of Rhamnaceae,which originated in China and has been listed as one of the"five fruits"since ancient times.Xinjiang is the most important jujube producing area in China,and its yield has accounted for 50%of the national jujube yield.In the five prefectures and cities of southern Xinjiang,as well as the regimental farms of southern and eastern Xinjiang of Xinjiang Production and Construction Corps,the jujube industry is an advantageous characteristic industry in agriculture.This paper studied Xinjiang jujube industry and its agricultural intellectual property resources,analyzed six major issues to be further implemented,such as the"three new developments"thinking and the strategy of building an intellectual property power,and puts forward eight strategies such as coordinating the two markets and two resources to accelerate the construction of a new development pattern and dual circulation of jujube.
文摘This paper examines China’s flying geese paradigm that serves as a key driver of a new pattern of the country’s economic development.Our results suggest that such a major power’s flying geese paradigm has taken shape in the aftermath of the global financial crisis in 2008.However,this paradigm has provincial heterogeneity in that industrial relocation varies across provinces.For instance,China’s central and western regions have shown differences while serving as destinations for labor-intensive industries and processing trade.This flying geese paradigm evolves in a slow and nonlinear manner,and may be subject to stagnation and even reversal.
文摘On the way to the construction of new countryside, Henan province has been exploring its own new construction development pattern actively. This paper analyzes the four development patterns-Xingyang mode, Zhongmou mode,Xinmi mode and Gongyi mode --from the perspective of ecological civilization development on the basis of sufficient data and extensive research. This also concludes their experience to realize the sustainable development of the new construction of new countryside.
基金Supported by Guangxi Natural Science Foundation(0991200)World Bank Loans Guangxi Eco-homes Project(2010-01,2010-03)+1 种基金Guangxi Soft Science Project(11217002-24)Basic Service Expense Project for Provincial Science and Technology of Guangxi Academy of Agricultural Sciences(200938)
文摘In order to achieve characteristic,high-quality,high-efficiency,low-consumption,healthy and intensive breeding,we use the ecology method to analyze the status quo of development of characteristic breeding industry in Guangxi,from advantages in resources,industrial development,characteristic breeding,and standardized construction.There are some problems existing in the development of characteristic breeding industry in Guangxi:prominent contradiction among human,land and grain;outdated breeding mode;low comprehensive utilization rate of resources;increasingly deteriorating ecological environment.We put forth the following recommendations:based on the ecological and economic principles,introducing"reduce,reuse,recycle"idea of circular economy;striving to choose the development pattern of circular economy adapting to local resource characteristics,planting and breeding habits;in terms of realization path,paying close attention to construction of standardized breeding farm,cultivation of organic fertilizer industry,infrastructure construction,environmental law enforcement,and other parts;reinforcing the policy guidance,adjusting and optimizing industrial structure,strengthening scientific and technological innovation,and advancing industrialization management,to promote steady development of circular economy of characteristic breeding industry in Guangxi,and accelerate the process of rejuvenating province by breeding industry,enriching the people and building up Guangxi.
文摘The overall regional development planning pattern has been considered to be a new and effective pattern as for development of provincial economy.The article analyzed the current conditions of the west of Shandong Province and tried to find the generation mechanisms of current non-balanced economic development of Shandong Province.And then approaches to regional development were put forward according to the theory of regional development pattern as a whole.
文摘Foeused on the lack of proper organization for patterns in the development of pattern based software, a POMSDP model with layered tree structure for organizing patterns during the process of development was put torward. The model and its interrelated eoneepts were strictly defined and introduced by applying the theory of set, symbolie logic and pattern, which ensures the correctness, maturity and expansibility of the model. The expansibility of the model was discussed mainly. The basic realization and the application in the automatic query system were presented. Based on the existing software development methods, the POMSDP model resolves the problem of chaos in the application of patterns, strengthens the controllability of the system, and facilitates the improvement, maintenance, expansion, and especially the reengineering of the software system.
文摘Tourism is one of the important industries in China. It has become China＇s important economic growth point. But from the development of tourist attractions in China, we find that many problems still exist, especially the sources of funds. This will seriously impede the further development of tourism industry. Based on the analysis, related countermeasures have been set forth. And yet the best approach to resolve funding issues is financing.
