For rigid-flexible coupling multi-body with variable topology,such as the system of internally carried air-launched or heavy cargo airdrop,in order to construct a dynamic model with unified form,avoid redundancy in th...For rigid-flexible coupling multi-body with variable topology,such as the system of internally carried air-launched or heavy cargo airdrop,in order to construct a dynamic model with unified form,avoid redundancy in the modeling process and make the solution independent,a method based on the equivalent rigidization model was proposed.It divides a system into independent subsystems by cutting off the joints,of which types are changed with the operation process of the system.And models of different subsystems can be constructed via selecting suitable modeling methods.Subsystem models with flexible bodies are on the basis of the equivalent rigidization model which replaces the flexible bodies with the virtual rigid bodies.And the solution for sanction,which is based on the constraints force algorithm(CFA)and vector mechanics,can be independent on the state equations.The internally carried air-launched system was taken as an example for verifying validity and feasibility of the method and theory.The dynamic model of aircraft-rocket-parachute system in the entire phase was constructed.Comparing the modeling method with the others,the modeling process was programmed;and form of the model is unified and simple.The model,method and theory can be used to analyze other similar systems such as heavy cargo airdrop system and capsule parachute recovery system.展开更多
The Xinjiang Production andConstruction Corps (XPCC) was foundedin October 1954. Since 1990, its plan hasbeen listed directly under the state councilof PRC.After 50 years of arduouspioneering and development, the XPCC...The Xinjiang Production andConstruction Corps (XPCC) was foundedin October 1954. Since 1990, its plan hasbeen listed directly under the state councilof PRC.After 50 years of arduouspioneering and development, the XPCChas now developed to be a specialorganization with a solid economicstrength and enterprise group superiority,which is based on the large-scale andmodernized agriculture, and guided展开更多
Although composting is a very effective way to dispose agricultural wastes,its development is greatly limited by the low compost quality and greenhouse gas emissions.At present,there is a lack of effective means to so...Although composting is a very effective way to dispose agricultural wastes,its development is greatly limited by the low compost quality and greenhouse gas emissions.At present,there is a lack of effective means to solve these two problems simultaneously.Here,the effects of three additives of compound microbial agent,biochar and biochar carried microbial agent on the composting performance,nitrogen transformation,greenhouse gas and ammonia emissions,and bacterial communities were investigated in sheep manure composting during 28 days.Results showed that biochar carried microbial agent prolonged the thermophilic stage and promoted compost maturity.At the same time,it was confirmed by the increase of the decomposition of organic nitrogen and the transformation of NH_(4)^(+)-N to NO_(3)^(−)-N.Besides,adding biochar carried microbial agent decreased CH_(4),NH_(3) and N_(2)O emissions by 65.23%,42.05%and 68.64%,respectively.The gas emissions were mainly correlated to Chloroflexi,Myxococcota,Acidobacteriota,Firmicutes,and Gemmatimonadota.Redundancy analysis showed that EC and TKN were closely related to bacterial community.Therefore,biochar carried microbial agent is recommended as an effective additive to enhance compost quality and reduce gas emissions during sheep manure composting.展开更多
Neurons carry apical dendrites that perceive information and a basal axon that transmits the computed information towards its to rgets.The axon originates at the axon hillock which is followed by the axon initial segm...Neurons carry apical dendrites that perceive information and a basal axon that transmits the computed information towards its to rgets.The axon originates at the axon hillock which is followed by the axon initial segment.Here,action potentials are initiated that are based on millisecond long openings of specific voltagegated sodium and potassium channels that are conserved in all parahoxozoa(Placozoa,Cnidaria,Bilateria)(Li et al.,2015).展开更多
For migratory waterbirds,the quality of wintering habitat is related to spring migration and successful breeding in the next year.The availability of food resources in the habitat is critical and varies within water l...For migratory waterbirds,the quality of wintering habitat is related to spring migration and successful breeding in the next year.The availability of food resources in the habitat is critical and varies within water levels.Although the water-level fluctuations in Poyang Lake have been extremely variable interannually in recent years,the wintering waterbird populations have remained relatively stable.Hence,the mechanism of maintaining the stability is worth exploring.This study aimed to compare the distribution of vegetation and herbivorous wa-terbirds in 2015-2016 and 2016-2017,focusing on three shallow sub-lakes and one main lake are.The results showed that the emergence of tubers and the growth of Carex spp.provided a continuous food supply and habitat for wintering waterbirds with a gradual decline in the water level.Shallow sub-lakes supported almost all of the tuber-eating waterbirds(1.42-1.62×10^(5))and most geese(1.34-1.53×10^(6)).However,the main lake area,covered with Persicaria hydropiper,did not provide adequate and accessible food.This resulted in almost no distribution of tuber-eating waterbirds,with only a few geese congregating in early winter.Our results demonstrated that the shallow sub-lakes under human control provided a different environment from the main lake and are key to sustaining the successful wintering of hundreds of thousands of migratory waterbirds in Poyang Lake.Therefore,we recommend refining the anthropogenic management of the shallow sub-lakes to regulate the water level to ensure the carrying capacity of Poyang Lake.展开更多
Semiarid Patagonia represents 25%of the rangeland area in Argentina,and sheep overgrazing has degraded about a third of it in the past.In this century,depleted domestic stocks have mostly stabilized,but Guanaco popula...Semiarid Patagonia represents 25%of the rangeland area in Argentina,and sheep overgrazing has degraded about a third of it in the past.In this century,depleted domestic stocks have mostly stabilized,but Guanaco populations have grown.These native camelids share habitat and diets with sheep,but their effect on vegetation is poorly understood and has long been debated.We set up an exclusion experiment in Monte León and Cañadón Vaca,a semiarid shrubland grassland in southern Patagonia,currently grazed only by guanacos.Vegetation baselines were studied in 2016 in twelve plots,and half of them were protected from guanaco grazing.Thirty-six plots were cleared to study revegetation.Vegetation was reassessed in 2021,and changes were evaluated using a paired t-test.Within protected plots,vegetation cover increased,bare soil diminished,and vegetated patches grew in size,but the density of the patch-interpatch arrangement did not change.Biodiversity,measured by richness and the Shan-non-Wiener(SW)index,grew significantly.Nutrient recycling increased,as did the Stability and Infiltration Land Function indexes,although these last differences were not significant.Vegetation cover under guanaco grazing also increased,mainly due to the growth of dwarf shrubs,a typical tendency in sheep grazing-induced transitions in the region.Vegetated patches under grazing fragmented,resulting in smaller patches and denser patch struc-tures,while diversity and land function indexes remained unchanged.Young plants established in cleared plots without guanacos showed higher cover density and individual size.These effects are similar to those observed in numerous experimental sheep exclosures.Guanaco grazing may thus prevent restoration and contribute to the generalized land degradation processes that overgrazing has been causing in Patagonia for over a century.展开更多
Quantitatively assessing the carrying capacity of water and land resources systems in arid and semi-arid areas is crucial for achieving the 2030 Sustainable Development Goals.In this work,taking Yulin City in China as...Quantitatively assessing the carrying capacity of water and land resources systems in arid and semi-arid areas is crucial for achieving the 2030 Sustainable Development Goals.In this work,taking Yulin City in China as a case study and employing the Criteria Importance Through Intercriteria Correlation(CRITIC)method,a modified model of coupling degree was developed to evaluate the car-rying capacity of water and land resources systems endowment and utilization,as well as their coupling coordination degree from 2013 to 2020.Our findings indicate that the water and land resources of Yulin are diminishing due to declines in agriculture,higher industrial water use,and wetland shrinkage.However,reallocating domestic water for ecological sustainability and reducing sloping farmland can mitigate this trend of decline.Temporally,as the coupling coordination between water and land resources system endowment in Yulin continuously improved,the coupling coordination between water and land resources system utilization first decreased and then in-creased with 2016 as the turning point.Spatially,the carrying capacity of water and land resources systems,the coupling coordination degree between water and land resources system endowment,and the coupling coordination degree between water and land resources system utilization in Yulin exhibited the same pattern of being higher in the six northern counties than in the six southern counties.Improving the water resources endowment is vital for the highly efficient use of water and land resources.展开更多
Ecological restoration projects implemented over the past 20 years have substantially increased forest coverage in China,but the high tree mortality of new afforestation forest remains a challenging but unsolved probl...Ecological restoration projects implemented over the past 20 years have substantially increased forest coverage in China,but the high tree mortality of new afforestation forest remains a challenging but unsolved problem.It is still not clear how much vegetation can be sustained by the forest lands with given water,energy and soil conditions,i.e.,the carrying capacity for vegetation(CCV)of forest lands,which is the prerequisite for planning and implementing forest restoration projects.Here,we used a simplified method to evaluate the CCV across forest lands nationwide.Specifically,based on leaf area index(LAI)dataset,we use boosted regression tree and multiple linear regression model to analyze the CCV during 2001-2020 and 2021-2030 and explore the contribution of environmental factors.We find that there are three typical regions with lower CCV located in the Loess Plateau and the southern region of the Inner Mongolia Plateau,the Hengduan Mountain region,and the Tianshan Mountains.More importantly,the vegetation in the regions near the dry-wet climate transition zone show excess local carrying capacity for vegetation over the past two decades and they are more susceptible to potential climatic stress.In comparison,in the Greater Khingan Mountains and Hengduan Mountains,there is high potential to improve the forest growth.Temperature,precipitation and soil affects the CCV by shaping the vegetation in the optimal range.This indicates that more consideration should be given to restrictions of regional environmental constraints when planning afforestation and forest management.This study has important implications for guiding future forest scheme in China.展开更多
Tourism is a popular activity that allows individuals to escape their daily routines and explore new destinations for various reasons,including leisure,pleasure,or business.A recent study has proposed a unique mathema...Tourism is a popular activity that allows individuals to escape their daily routines and explore new destinations for various reasons,including leisure,pleasure,or business.A recent study has proposed a unique mathematical concept called a q−Rung orthopair fuzzy hypersoft set(q−ROFHS)to enhance the formal representation of human thought processes and evaluate tourism carrying capacity.This approach can capture the imprecision and ambiguity often present in human perception.With the advanced mathematical tools in this field,the study has also incorporated the Einstein aggregation operator and score function into the q−ROFHS values to supportmultiattribute decision-making algorithms.By implementing this technique,effective plans can be developed for social and economic development while avoiding detrimental effects such as overcrowding or environmental damage caused by tourism.A case study of selected tourism carrying capacity will demonstrate the proposed methodology.展开更多
I recently got the opportunity to visit China to attend a seminar organized by the China Counsel for the Promotion of International Trade(CCPIT),for participants from the Belt and Road Initiative(BRI)countries.The pur...I recently got the opportunity to visit China to attend a seminar organized by the China Counsel for the Promotion of International Trade(CCPIT),for participants from the Belt and Road Initiative(BRI)countries.The purpose of the seminar was to invite the delegates from BRI countries,and give them firsthand experience of the Chinese development miracle by introducing them to Chinese history,its governance methodology and how it has managed to carry out its significant progress in the last three decades,for example,by following policies that facilitated entrepreneurship,and providing businesses the right kind of platform.展开更多
Under the background of new infrastructure,the Yellow River Basin’s superior growth cannot be separated originating with the synergistic effect of scientific and technological inventiveness and ecological civilizatio...Under the background of new infrastructure,the Yellow River Basin’s superior growth cannot be separated originating with the synergistic effect of scientific and technological inventiveness and ecological civilization construction.In light of the coupling coordination analysis of the coordination effect of provincial high-tech industry agglomeration and resource carrying capacity in the Yellow River Basin from 2009 to 2021,The evolution of the geographical and temporal pattern of development was investigated using the Moran index and kernel density estimation.The results show that the agglomeration of high-tech industries in the Yellow River Basin presents a development trend of seek improvement in stability,and there is a good coupling and coordination throughout the progression of scientific and technological innovation and the loading capacity of the resource,from the viewpoint of a time series.From the perspective of spatial pattern distribution,the whole basin aims at the lower reaches,accelerates the optimization of digital industry and promotes Yellow River Basin development of superior quality through innovation support and increase of input,and based on policy guidance.展开更多
This essay analyses Theodore Dreiser’s Sister Carrie through the lens of cultural studies,examining the portrayal of domesticity and the quest for an ideal home in late-nineteenth-century America.It explores the comp...This essay analyses Theodore Dreiser’s Sister Carrie through the lens of cultural studies,examining the portrayal of domesticity and the quest for an ideal home in late-nineteenth-century America.It explores the complex relationships between the main characters,Carrie and Hurstwood,and their families,as well as their struggles with materialism and alienation.Through close analysis of societal context,the characters’familial backgrounds and emotional yearnings,the essay delves into the characters’longing for stability and belonging and their journey toward understanding the true essence of dwelling amidst the changing urban landscape.It argues that Dreiser’s novel critiques the superficial pursuit of material comforts and highlights the importance of introspection and self-discovery in finding lasting happiness amidst societal turmoil.Ultimately,through the prism of domesticity,the essay delves into broader themes of identity,belonging,and existential fulfillment in a heartless society marked by materialism and alienation.展开更多
May 19,2024 marked the 14th China Tourism Day.The Ministry of Culture and Tourism of the People's Republic of China took this opportunity to carry out a series of both online and offline promotion activities in th...May 19,2024 marked the 14th China Tourism Day.The Ministry of Culture and Tourism of the People's Republic of China took this opportunity to carry out a series of both online and offline promotion activities in the form of theme month,theme week and theme day throughout May,making the May 19 China Tourism Day shared by the whole people.展开更多
On January 22,the signing ceremony of the Wanli Tea Road Special Fund for the Protection of International Cultural Heritage jointly initiated by the Wanli Tea Collaboration of the Chinese Culture Promotion Association...On January 22,the signing ceremony of the Wanli Tea Road Special Fund for the Protection of International Cultural Heritage jointly initiated by the Wanli Tea Collaboration of the Chinese Culture Promotion Association,and Hainan Asian Culture and Arts Foundation was held in Beijing.This fund will be used to organise activities featuring art,design and public welfare that are related to the Wanli Tea Road,including the Wanli Tea Road International Cultural Forum and the Wanli Tea Road International Artistic Creation Project,carry out preservation of the Wanli Tea Road international cultural heritage,and support the bidding of"Wanli Tea Road"for the World Cultural Heritage.展开更多
During the Chinese New Year of 2024,China National Opera&Dance Drama Theater was invited to Hungary,Sweden,Denmark and Norway to carry out the 2024"Happy Chinese NewYear"tour performance.China National O...During the Chinese New Year of 2024,China National Opera&Dance Drama Theater was invited to Hungary,Sweden,Denmark and Norway to carry out the 2024"Happy Chinese NewYear"tour performance.China National Opera&Dance Drama Theater sent a visiting team composed of 29 artists to touch the hearts of overseas audiences with the art of ethnic singing and dancing and the deep charm of the Chinese culture,and to spread the essence of the Chinese culture in the dialogue with the world.展开更多
Carried-Heat Partial Gasification Combined cycle is a novel combined cycle which was proposed by Thermal Engineering Department of Tsinghua University in 1992. The idea of the system comes from the situation that the ...Carried-Heat Partial Gasification Combined cycle is a novel combined cycle which was proposed by Thermal Engineering Department of Tsinghua University in 1992. The idea of the system comes from the situation that the efficiency of the power plants in China is much lower than that of the advanced countries, but the coal consumption is much higher, which brings about the waste of primary energy resources and the pollution of the environment. With the deep study of the gasification technology, Coke Carried-Heat Gasification Coal-Fired Combined Cycle, as the improved system, came into birth in 1996 based on the partial gasification one. At the end of 1997, a new cycle scheme similar to IGCC was created. This paper focuses on several classes combined cycle put forward by Tsinghua University, depending on the plant configuration and carbon conversion, making the solution a viable and attractive option for efficient coal utilization.展开更多
It's raining outside.Should you wear a raincoat or carry an umbrella?Raincoats are great.because they cover your whole body.When you wear a raincoat,your hands are free.You can use them for other things.You can we...It's raining outside.Should you wear a raincoat or carry an umbrella?Raincoats are great.because they cover your whole body.When you wear a raincoat,your hands are free.You can use them for other things.You can wear a raincoat and ride a scooter in the rain.It's hard to ride a scooter with an umbrella.展开更多
文摘For rigid-flexible coupling multi-body with variable topology,such as the system of internally carried air-launched or heavy cargo airdrop,in order to construct a dynamic model with unified form,avoid redundancy in the modeling process and make the solution independent,a method based on the equivalent rigidization model was proposed.It divides a system into independent subsystems by cutting off the joints,of which types are changed with the operation process of the system.And models of different subsystems can be constructed via selecting suitable modeling methods.Subsystem models with flexible bodies are on the basis of the equivalent rigidization model which replaces the flexible bodies with the virtual rigid bodies.And the solution for sanction,which is based on the constraints force algorithm(CFA)and vector mechanics,can be independent on the state equations.The internally carried air-launched system was taken as an example for verifying validity and feasibility of the method and theory.The dynamic model of aircraft-rocket-parachute system in the entire phase was constructed.Comparing the modeling method with the others,the modeling process was programmed;and form of the model is unified and simple.The model,method and theory can be used to analyze other similar systems such as heavy cargo airdrop system and capsule parachute recovery system.
文摘The Xinjiang Production andConstruction Corps (XPCC) was foundedin October 1954. Since 1990, its plan hasbeen listed directly under the state councilof PRC.After 50 years of arduouspioneering and development, the XPCChas now developed to be a specialorganization with a solid economicstrength and enterprise group superiority,which is based on the large-scale andmodernized agriculture, and guided
基金National Key Research and Development Program of China(2018YFC1802904)National Science Foundation of China(52264013 and 41867061)+2 种基金Inner Mongolia Science&Technology Plan Program(2019 and 2020)National Science Foundation of Inner Mongolia(2020MS02005)Inner Mongolia Engineering Research Center of Evaluation and Restoration in the Mining Ecological Environment and the Special Fund for the Transformation of Scientific and Technological Achievements in Inner Mongolia(2019CG062).
文摘Although composting is a very effective way to dispose agricultural wastes,its development is greatly limited by the low compost quality and greenhouse gas emissions.At present,there is a lack of effective means to solve these two problems simultaneously.Here,the effects of three additives of compound microbial agent,biochar and biochar carried microbial agent on the composting performance,nitrogen transformation,greenhouse gas and ammonia emissions,and bacterial communities were investigated in sheep manure composting during 28 days.Results showed that biochar carried microbial agent prolonged the thermophilic stage and promoted compost maturity.At the same time,it was confirmed by the increase of the decomposition of organic nitrogen and the transformation of NH_(4)^(+)-N to NO_(3)^(−)-N.Besides,adding biochar carried microbial agent decreased CH_(4),NH_(3) and N_(2)O emissions by 65.23%,42.05%and 68.64%,respectively.The gas emissions were mainly correlated to Chloroflexi,Myxococcota,Acidobacteriota,Firmicutes,and Gemmatimonadota.Redundancy analysis showed that EC and TKN were closely related to bacterial community.Therefore,biochar carried microbial agent is recommended as an effective additive to enhance compost quality and reduce gas emissions during sheep manure composting.
基金supported by the Deutsche Forschungsgemeinschaft through funds to CK(SFB1348,B5,KI 588/29)。
文摘Neurons carry apical dendrites that perceive information and a basal axon that transmits the computed information towards its to rgets.The axon originates at the axon hillock which is followed by the axon initial segment.Here,action potentials are initiated that are based on millisecond long openings of specific voltagegated sodium and potassium channels that are conserved in all parahoxozoa(Placozoa,Cnidaria,Bilateria)(Li et al.,2015).
基金funded by the Poyang Lake Water Conservancy Project Office of the Department of Water Resources,Jiangxi Province,China(KT201537)the National Natural Science Foundation of China(Grant No.32360285)the National Geographic Air and Water Con-servation Fund(GEFC07-15).
文摘For migratory waterbirds,the quality of wintering habitat is related to spring migration and successful breeding in the next year.The availability of food resources in the habitat is critical and varies within water levels.Although the water-level fluctuations in Poyang Lake have been extremely variable interannually in recent years,the wintering waterbird populations have remained relatively stable.Hence,the mechanism of maintaining the stability is worth exploring.This study aimed to compare the distribution of vegetation and herbivorous wa-terbirds in 2015-2016 and 2016-2017,focusing on three shallow sub-lakes and one main lake are.The results showed that the emergence of tubers and the growth of Carex spp.provided a continuous food supply and habitat for wintering waterbirds with a gradual decline in the water level.Shallow sub-lakes supported almost all of the tuber-eating waterbirds(1.42-1.62×10^(5))and most geese(1.34-1.53×10^(6)).However,the main lake area,covered with Persicaria hydropiper,did not provide adequate and accessible food.This resulted in almost no distribution of tuber-eating waterbirds,with only a few geese congregating in early winter.Our results demonstrated that the shallow sub-lakes under human control provided a different environment from the main lake and are key to sustaining the successful wintering of hundreds of thousands of migratory waterbirds in Poyang Lake.Therefore,we recommend refining the anthropogenic management of the shallow sub-lakes to regulate the water level to ensure the carrying capacity of Poyang Lake.
基金Resources for this study were obtained from INTA Projects.
文摘Semiarid Patagonia represents 25%of the rangeland area in Argentina,and sheep overgrazing has degraded about a third of it in the past.In this century,depleted domestic stocks have mostly stabilized,but Guanaco populations have grown.These native camelids share habitat and diets with sheep,but their effect on vegetation is poorly understood and has long been debated.We set up an exclusion experiment in Monte León and Cañadón Vaca,a semiarid shrubland grassland in southern Patagonia,currently grazed only by guanacos.Vegetation baselines were studied in 2016 in twelve plots,and half of them were protected from guanaco grazing.Thirty-six plots were cleared to study revegetation.Vegetation was reassessed in 2021,and changes were evaluated using a paired t-test.Within protected plots,vegetation cover increased,bare soil diminished,and vegetated patches grew in size,but the density of the patch-interpatch arrangement did not change.Biodiversity,measured by richness and the Shan-non-Wiener(SW)index,grew significantly.Nutrient recycling increased,as did the Stability and Infiltration Land Function indexes,although these last differences were not significant.Vegetation cover under guanaco grazing also increased,mainly due to the growth of dwarf shrubs,a typical tendency in sheep grazing-induced transitions in the region.Vegetated patches under grazing fragmented,resulting in smaller patches and denser patch struc-tures,while diversity and land function indexes remained unchanged.Young plants established in cleared plots without guanacos showed higher cover density and individual size.These effects are similar to those observed in numerous experimental sheep exclosures.Guanaco grazing may thus prevent restoration and contribute to the generalized land degradation processes that overgrazing has been causing in Patagonia for over a century.
基金Under the auspices of the National Natural Science Foundation of China(No.42271279,41931293,41801175)。
文摘Quantitatively assessing the carrying capacity of water and land resources systems in arid and semi-arid areas is crucial for achieving the 2030 Sustainable Development Goals.In this work,taking Yulin City in China as a case study and employing the Criteria Importance Through Intercriteria Correlation(CRITIC)method,a modified model of coupling degree was developed to evaluate the car-rying capacity of water and land resources systems endowment and utilization,as well as their coupling coordination degree from 2013 to 2020.Our findings indicate that the water and land resources of Yulin are diminishing due to declines in agriculture,higher industrial water use,and wetland shrinkage.However,reallocating domestic water for ecological sustainability and reducing sloping farmland can mitigate this trend of decline.Temporally,as the coupling coordination between water and land resources system endowment in Yulin continuously improved,the coupling coordination between water and land resources system utilization first decreased and then in-creased with 2016 as the turning point.Spatially,the carrying capacity of water and land resources systems,the coupling coordination degree between water and land resources system endowment,and the coupling coordination degree between water and land resources system utilization in Yulin exhibited the same pattern of being higher in the six northern counties than in the six southern counties.Improving the water resources endowment is vital for the highly efficient use of water and land resources.
基金supported by the Joint CAS-MPG Research Project(Grant No.HZXM20225001MI)the National Natural Science Founda-tion of China(NSFC)(Grant No.41991234)the National Science Foundation(Grant No.1903722).
文摘Ecological restoration projects implemented over the past 20 years have substantially increased forest coverage in China,but the high tree mortality of new afforestation forest remains a challenging but unsolved problem.It is still not clear how much vegetation can be sustained by the forest lands with given water,energy and soil conditions,i.e.,the carrying capacity for vegetation(CCV)of forest lands,which is the prerequisite for planning and implementing forest restoration projects.Here,we used a simplified method to evaluate the CCV across forest lands nationwide.Specifically,based on leaf area index(LAI)dataset,we use boosted regression tree and multiple linear regression model to analyze the CCV during 2001-2020 and 2021-2030 and explore the contribution of environmental factors.We find that there are three typical regions with lower CCV located in the Loess Plateau and the southern region of the Inner Mongolia Plateau,the Hengduan Mountain region,and the Tianshan Mountains.More importantly,the vegetation in the regions near the dry-wet climate transition zone show excess local carrying capacity for vegetation over the past two decades and they are more susceptible to potential climatic stress.In comparison,in the Greater Khingan Mountains and Hengduan Mountains,there is high potential to improve the forest growth.Temperature,precipitation and soil affects the CCV by shaping the vegetation in the optimal range.This indicates that more consideration should be given to restrictions of regional environmental constraints when planning afforestation and forest management.This study has important implications for guiding future forest scheme in China.
基金the National Research Foundation of Korea(NRF)grant funded by the Korea government(MSIT)(No.2021R1A4A1031509).
文摘Tourism is a popular activity that allows individuals to escape their daily routines and explore new destinations for various reasons,including leisure,pleasure,or business.A recent study has proposed a unique mathematical concept called a q−Rung orthopair fuzzy hypersoft set(q−ROFHS)to enhance the formal representation of human thought processes and evaluate tourism carrying capacity.This approach can capture the imprecision and ambiguity often present in human perception.With the advanced mathematical tools in this field,the study has also incorporated the Einstein aggregation operator and score function into the q−ROFHS values to supportmultiattribute decision-making algorithms.By implementing this technique,effective plans can be developed for social and economic development while avoiding detrimental effects such as overcrowding or environmental damage caused by tourism.A case study of selected tourism carrying capacity will demonstrate the proposed methodology.
文摘I recently got the opportunity to visit China to attend a seminar organized by the China Counsel for the Promotion of International Trade(CCPIT),for participants from the Belt and Road Initiative(BRI)countries.The purpose of the seminar was to invite the delegates from BRI countries,and give them firsthand experience of the Chinese development miracle by introducing them to Chinese history,its governance methodology and how it has managed to carry out its significant progress in the last three decades,for example,by following policies that facilitated entrepreneurship,and providing businesses the right kind of platform.
基金supported by the 2021 Research and Practice Project of Higher Education Teaching Reform in Henan Province(Grant No.2021SJGLX072Y).
文摘Under the background of new infrastructure,the Yellow River Basin’s superior growth cannot be separated originating with the synergistic effect of scientific and technological inventiveness and ecological civilization construction.In light of the coupling coordination analysis of the coordination effect of provincial high-tech industry agglomeration and resource carrying capacity in the Yellow River Basin from 2009 to 2021,The evolution of the geographical and temporal pattern of development was investigated using the Moran index and kernel density estimation.The results show that the agglomeration of high-tech industries in the Yellow River Basin presents a development trend of seek improvement in stability,and there is a good coupling and coordination throughout the progression of scientific and technological innovation and the loading capacity of the resource,from the viewpoint of a time series.From the perspective of spatial pattern distribution,the whole basin aims at the lower reaches,accelerates the optimization of digital industry and promotes Yellow River Basin development of superior quality through innovation support and increase of input,and based on policy guidance.
文摘This essay analyses Theodore Dreiser’s Sister Carrie through the lens of cultural studies,examining the portrayal of domesticity and the quest for an ideal home in late-nineteenth-century America.It explores the complex relationships between the main characters,Carrie and Hurstwood,and their families,as well as their struggles with materialism and alienation.Through close analysis of societal context,the characters’familial backgrounds and emotional yearnings,the essay delves into the characters’longing for stability and belonging and their journey toward understanding the true essence of dwelling amidst the changing urban landscape.It argues that Dreiser’s novel critiques the superficial pursuit of material comforts and highlights the importance of introspection and self-discovery in finding lasting happiness amidst societal turmoil.Ultimately,through the prism of domesticity,the essay delves into broader themes of identity,belonging,and existential fulfillment in a heartless society marked by materialism and alienation.
文摘May 19,2024 marked the 14th China Tourism Day.The Ministry of Culture and Tourism of the People's Republic of China took this opportunity to carry out a series of both online and offline promotion activities in the form of theme month,theme week and theme day throughout May,making the May 19 China Tourism Day shared by the whole people.
文摘On January 22,the signing ceremony of the Wanli Tea Road Special Fund for the Protection of International Cultural Heritage jointly initiated by the Wanli Tea Collaboration of the Chinese Culture Promotion Association,and Hainan Asian Culture and Arts Foundation was held in Beijing.This fund will be used to organise activities featuring art,design and public welfare that are related to the Wanli Tea Road,including the Wanli Tea Road International Cultural Forum and the Wanli Tea Road International Artistic Creation Project,carry out preservation of the Wanli Tea Road international cultural heritage,and support the bidding of"Wanli Tea Road"for the World Cultural Heritage.
文摘During the Chinese New Year of 2024,China National Opera&Dance Drama Theater was invited to Hungary,Sweden,Denmark and Norway to carry out the 2024"Happy Chinese NewYear"tour performance.China National Opera&Dance Drama Theater sent a visiting team composed of 29 artists to touch the hearts of overseas audiences with the art of ethnic singing and dancing and the deep charm of the Chinese culture,and to spread the essence of the Chinese culture in the dialogue with the world.
文摘Carried-Heat Partial Gasification Combined cycle is a novel combined cycle which was proposed by Thermal Engineering Department of Tsinghua University in 1992. The idea of the system comes from the situation that the efficiency of the power plants in China is much lower than that of the advanced countries, but the coal consumption is much higher, which brings about the waste of primary energy resources and the pollution of the environment. With the deep study of the gasification technology, Coke Carried-Heat Gasification Coal-Fired Combined Cycle, as the improved system, came into birth in 1996 based on the partial gasification one. At the end of 1997, a new cycle scheme similar to IGCC was created. This paper focuses on several classes combined cycle put forward by Tsinghua University, depending on the plant configuration and carbon conversion, making the solution a viable and attractive option for efficient coal utilization.
文摘It's raining outside.Should you wear a raincoat or carry an umbrella?Raincoats are great.because they cover your whole body.When you wear a raincoat,your hands are free.You can use them for other things.You can wear a raincoat and ride a scooter in the rain.It's hard to ride a scooter with an umbrella.
