Achieving the dual carbon goal through energy transition has become a global consensus.The increasingly recognized of mineral resources is increasingly recognized due to their role in determining the pace of energy tr...Achieving the dual carbon goal through energy transition has become a global consensus.The increasingly recognized of mineral resources is increasingly recognized due to their role in determining the pace of energy transition.China has a leading capacity in the production and processing of certain minerals.However,because the major sources are abroad,China still faces certain disadvantages in acquiring upstream resources.In response to the complex international situation and high consumption demand。展开更多
The recent Russian-Ukrainian crisis has had a substantial impact on the global natural gas supply landscape and brought major challenges to liquified natural gas(LNG)supply chain safety in many countries.However,acade...The recent Russian-Ukrainian crisis has had a substantial impact on the global natural gas supply landscape and brought major challenges to liquified natural gas(LNG)supply chain safety in many countries.However,academic research in this field remains scarce.This study aims to analyze the global LNG marine supply network changes during the recent Russian-Ukrainian crisis.Big data analytics are applied to the global vessel trajectory information recorded by automatic identification system(AIS).The weighted degree index indicates that global LNG marine supply is still primarily led by a few exporting countries,and the Middle East Port of Ras Laffan now occupies the central position.In 2022,the betweenness centrality and other indicators of the LNG shipping network showed a high middle and low end,indicating that the network has a certain degree of resilience.After the Russian-Ukrainian crisis happened,LNG exports from Qatar,the United States,and Russia increased.Resource flows have reshaped the competitive standing of countries.The European LNG market witnessed a significant intensification in the export competition between Russia and the United States.Despite the ongoing crisis,Russia's LNG export competitiveness remained resilient and displayed no indications of weakening.The results show new evidence for the changes in global natural resources marine supply influenced by the geopolitical events among countries.This has important implications for policymaking of LNG supply safety to the countries that rely heavily on imports.展开更多
Using system analysis theory and methods, a dynamic model of a water resource supply and demand system was built to simulate trends in the supply and demand of water in the Changsha-Zhuzhou-Xiangtan （Chang-Zhu-Tan） ...Using system analysis theory and methods, a dynamic model of a water resource supply and demand system was built to simulate trends in the supply and demand of water in the Changsha-Zhuzhou-Xiangtan （Chang-Zhu-Tan） urban agglomeration for the period 2012 to 2030. Four scenarios were examined; namely, a traditional development model, an economic development model, a water-saving model, and a coordinated development model. （i） The problem of balancing water resource supply and demand is becoming increasingly conspicuous with a growing population and a rapidly developing economy. （ii） By 2030, water demand is set to reach a total of 105.1 × 10^8 m^3, with a water supply of 5.4 × 10^8 m^3. A coordinated development model for water resource supply could meet the growing demands of socio-economic development, and generate huge comprehensive benefits. This will be the best solution for the development and utilization of a water resource supply and demand system in the Chang-Zhu-Tan urban agglomeration. （iii） We should accelerate the construction of water conservation projects, strengthen the management of water conservation, optimize economic structures, enhance our awareness of the importance of protecting water resources, hasten the recycling of waste water and environmental improvement, and promote utilization efficiency, and support the capabilities of water resources to meet our expectations.展开更多
Based on the data for meteorology, hydrology, soil, planting, vegetation, and socio-economic development of the irrigation region in the middle reaches of the Heihe River basin, Northwest China, the model of balance o...Based on the data for meteorology, hydrology, soil, planting, vegetation, and socio-economic development of the irrigation region in the middle reaches of the Heihe River basin, Northwest China, the model of balance of water supply and demand in the region was established, and the security of water resource was assessed, from which the results that the effects of unified management of water resources in the Heihe River basin between Gansu Province and Inner Mongolia on regional hydrology are significant with a decrease in water supply diverted from Heihe River and an increase in groundwater extracted. In addition, it was found that the groundwater level has been steadily decreasing due to over pumping and decrease in recharges. In present year （2003）, the volume of potential groundwater in the irrigation districts is far small because of the groundwater overdraft; even in the particular regions, there is no availability of groundwater resources for use. By 2003, water supply is not sufficient to meet the water demand in the different irrigation districts, the sustainable development and utilization of water resources are not secured, and the water supply crisis occurs in Pingchuan irrigation district. Achieving water security for the sustainable development of society, agriculture, economy, industry, and livelihoods while maintaining or improving the abilities of the management and planning of water resources, determining of the reasonable percentage between water supply and groundwater utilization and water saving in agricultural irrigation are taken into account. If this does not occur, it is feared that the present performance of water development and planning may further aggravate the problem of scarcities of water resources and further damage the fragile ecological system.展开更多
1 Introduction The conflict between resources and the environment has been increasingly outstanding as the population,economy and society around the globe have developed rapidly since the 21st century.An important cha...1 Introduction The conflict between resources and the environment has been increasingly outstanding as the population,economy and society around the globe have developed rapidly since the 21st century.An important challenge that the human展开更多
Water demand increases continuously with an increasing population and economic development. As a result, the difference between water supply and demand becomes a sig- nificant issue, especially in arid regions. To fig...Water demand increases continuously with an increasing population and economic development. As a result, the difference between water supply and demand becomes a sig- nificant issue, especially in arid regions. To figure out the utilization of water resources in the arid region of northwestern China （ARNWC）, and also to provide methodologies to predict the water use in future, three models were established in this study to calculate agricultural irri- gation, industrial and domestic water use in the ARNWC from the late 1980s to 2010. Based on river discharges in the region, the supply and demand of water resources at the river basin level were analyzed. The results indicated that agricultural irrigation demand occupies more than 90% of the total water use in the ARNWC. Total water demand increased from 31.97 km3 in the late 1980s to 48.19 km3 in 2010. Most river basins in this arid region were under me- dium and high water stress. Severe-risk river basins, such as the Shiyang river basin and the eastern part of the northern piedmont of the Tianshan Mountains, were found in this region. It was revealed that the water supply became critical from April to May, which was the season of the lowest water supply as determined by comparing monthly water consumption.展开更多
Considering the harder and harder competition among enterprises, this paper puts forward the Resource model of supply chain （RBV） to enhance competitive advantages, then analyses the source of supply chain competiti...Considering the harder and harder competition among enterprises, this paper puts forward the Resource model of supply chain （RBV） to enhance competitive advantages, then analyses the source of supply chain competitive advantages and introduce the advantage formula. Finally, the rent contribution to supply chain management is explained in detail.展开更多
By employing machine learning techniques and the Word2Vec model,we quantify the micro-level implementation of Industrial Internet technology in Chinese manufacturing firms from 2010 to 2022.This provides empirical evi...By employing machine learning techniques and the Word2Vec model,we quantify the micro-level implementation of Industrial Internet technology in Chinese manufacturing firms from 2010 to 2022.This provides empirical evidence for understanding how the Industrial Internet technology enhances corporate risk-taking capability.Our study shows that adopting this technology increases risk-taking capacity,mainly through resource reallocation.The information layer empowers improvements in organizational structure,the platform layer optimizes labor resources,and the edge/software layers facilitate the integration of supply chain resources.The effect is more pronounced in firms that are technology-and labor-intensive,particularly in environments of high economic policy uncertainty.In conclusion,the Industrial Internet boosts total factor productivity by fostering increased risk-taking.展开更多
Digital educational resources have become essential elements of modern educational public services.China’s national program on new educational infrastructure construction has proposed to take new infrastructure const...Digital educational resources have become essential elements of modern educational public services.China’s national program on new educational infrastructure construction has proposed to take new infrastructure construction of digital educational resources as one of the critical tasks.This paper aims to provide a theoretical basis for advancing the reform and development of digital educational resources in the new era.It classifies the current development and realistic challenges of China’s digital educational resources,and summaries and interprets the directions of the three construction projects of new type resources and tools,the resource supply system,and the resource supervisory system.It depicts the prospect of digital educational resource construction in the intelligent era in the combination of the strategic layout of the policies on new educational infrastructure construction.It also discusses such key technologies supporting new infrastructure construction of digital educational resources as multimodal learning analytics,disciplinary knowledge graphs,machine learning,and blockchain.It finally proposes a specific development path for new infrastructure construction of digital educational resources.展开更多
基金the General Project of the National Natural Science Foundation of China,“Research on the Method of CO_(2)Technology Economic Evaluation Based on Net Energy and Carbon Input-Output”(72274212)。
文摘Achieving the dual carbon goal through energy transition has become a global consensus.The increasingly recognized of mineral resources is increasingly recognized due to their role in determining the pace of energy transition.China has a leading capacity in the production and processing of certain minerals.However,because the major sources are abroad,China still faces certain disadvantages in acquiring upstream resources.In response to the complex international situation and high consumption demand。
基金Under the auspices of the National Natural Science Foundation of China(No.42130402)Shenzhen Science and Technology Program(No.JCYJ20220818100810024,KQTD20221101093604016)。
文摘The recent Russian-Ukrainian crisis has had a substantial impact on the global natural gas supply landscape and brought major challenges to liquified natural gas(LNG)supply chain safety in many countries.However,academic research in this field remains scarce.This study aims to analyze the global LNG marine supply network changes during the recent Russian-Ukrainian crisis.Big data analytics are applied to the global vessel trajectory information recorded by automatic identification system(AIS).The weighted degree index indicates that global LNG marine supply is still primarily led by a few exporting countries,and the Middle East Port of Ras Laffan now occupies the central position.In 2022,the betweenness centrality and other indicators of the LNG shipping network showed a high middle and low end,indicating that the network has a certain degree of resilience.After the Russian-Ukrainian crisis happened,LNG exports from Qatar,the United States,and Russia increased.Resource flows have reshaped the competitive standing of countries.The European LNG market witnessed a significant intensification in the export competition between Russia and the United States.Despite the ongoing crisis,Russia's LNG export competitiveness remained resilient and displayed no indications of weakening.The results show new evidence for the changes in global natural resources marine supply influenced by the geopolitical events among countries.This has important implications for policymaking of LNG supply safety to the countries that rely heavily on imports.
基金National Social Science Foundation of China, No. 15BJY051 Social Science Foundation of Hunan Province, No. 13YBA016 Science ＆ Technology Research Project of the Department of Land and Resource of Hunan Province, No.2014-13
文摘Using system analysis theory and methods, a dynamic model of a water resource supply and demand system was built to simulate trends in the supply and demand of water in the Changsha-Zhuzhou-Xiangtan （Chang-Zhu-Tan） urban agglomeration for the period 2012 to 2030. Four scenarios were examined; namely, a traditional development model, an economic development model, a water-saving model, and a coordinated development model. （i） The problem of balancing water resource supply and demand is becoming increasingly conspicuous with a growing population and a rapidly developing economy. （ii） By 2030, water demand is set to reach a total of 105.1 × 10^8 m^3, with a water supply of 5.4 × 10^8 m^3. A coordinated development model for water resource supply could meet the growing demands of socio-economic development, and generate huge comprehensive benefits. This will be the best solution for the development and utilization of a water resource supply and demand system in the Chang-Zhu-Tan urban agglomeration. （iii） We should accelerate the construction of water conservation projects, strengthen the management of water conservation, optimize economic structures, enhance our awareness of the importance of protecting water resources, hasten the recycling of waste water and environmental improvement, and promote utilization efficiency, and support the capabilities of water resources to meet our expectations.
基金This work was supported by the Knowledge Innovation Program from the Cold and Add Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences （CACX2003102）the Chinese Academy of Sciences （KZCX 1 - 10-03-01）the National Natural Science Foundation of China （40401012）.
文摘Based on the data for meteorology, hydrology, soil, planting, vegetation, and socio-economic development of the irrigation region in the middle reaches of the Heihe River basin, Northwest China, the model of balance of water supply and demand in the region was established, and the security of water resource was assessed, from which the results that the effects of unified management of water resources in the Heihe River basin between Gansu Province and Inner Mongolia on regional hydrology are significant with a decrease in water supply diverted from Heihe River and an increase in groundwater extracted. In addition, it was found that the groundwater level has been steadily decreasing due to over pumping and decrease in recharges. In present year （2003）, the volume of potential groundwater in the irrigation districts is far small because of the groundwater overdraft; even in the particular regions, there is no availability of groundwater resources for use. By 2003, water supply is not sufficient to meet the water demand in the different irrigation districts, the sustainable development and utilization of water resources are not secured, and the water supply crisis occurs in Pingchuan irrigation district. Achieving water security for the sustainable development of society, agriculture, economy, industry, and livelihoods while maintaining or improving the abilities of the management and planning of water resources, determining of the reasonable percentage between water supply and groundwater utilization and water saving in agricultural irrigation are taken into account. If this does not occur, it is feared that the present performance of water development and planning may further aggravate the problem of scarcities of water resources and further damage the fragile ecological system.
文摘1 Introduction The conflict between resources and the environment has been increasingly outstanding as the population,economy and society around the globe have developed rapidly since the 21st century.An important challenge that the human
基金National Key Project on Basic Research(973),No.2010CB951003The National Science and Technology Project,No.2014BAD10B06
文摘Water demand increases continuously with an increasing population and economic development. As a result, the difference between water supply and demand becomes a sig- nificant issue, especially in arid regions. To figure out the utilization of water resources in the arid region of northwestern China （ARNWC）, and also to provide methodologies to predict the water use in future, three models were established in this study to calculate agricultural irri- gation, industrial and domestic water use in the ARNWC from the late 1980s to 2010. Based on river discharges in the region, the supply and demand of water resources at the river basin level were analyzed. The results indicated that agricultural irrigation demand occupies more than 90% of the total water use in the ARNWC. Total water demand increased from 31.97 km3 in the late 1980s to 48.19 km3 in 2010. Most river basins in this arid region were under me- dium and high water stress. Severe-risk river basins, such as the Shiyang river basin and the eastern part of the northern piedmont of the Tianshan Mountains, were found in this region. It was revealed that the water supply became critical from April to May, which was the season of the lowest water supply as determined by comparing monthly water consumption.
文摘Considering the harder and harder competition among enterprises, this paper puts forward the Resource model of supply chain （RBV） to enhance competitive advantages, then analyses the source of supply chain competitive advantages and introduce the advantage formula. Finally, the rent contribution to supply chain management is explained in detail.
文摘By employing machine learning techniques and the Word2Vec model,we quantify the micro-level implementation of Industrial Internet technology in Chinese manufacturing firms from 2010 to 2022.This provides empirical evidence for understanding how the Industrial Internet technology enhances corporate risk-taking capability.Our study shows that adopting this technology increases risk-taking capacity,mainly through resource reallocation.The information layer empowers improvements in organizational structure,the platform layer optimizes labor resources,and the edge/software layers facilitate the integration of supply chain resources.The effect is more pronounced in firms that are technology-and labor-intensive,particularly in environments of high economic policy uncertainty.In conclusion,the Industrial Internet boosts total factor productivity by fostering increased risk-taking.
基金funded by the Ministry of Education Humanities and Social Science Research 2018 Project“Research on the Supply Models of Digital Educational Resources and Performance Assessment”(No.18YJA880036)the Key Project under the National Social Science Fund of China in 2018“Research on Basic Education Equality Driven by Informatization in the New Era”(No.18ZDA334).
文摘Digital educational resources have become essential elements of modern educational public services.China’s national program on new educational infrastructure construction has proposed to take new infrastructure construction of digital educational resources as one of the critical tasks.This paper aims to provide a theoretical basis for advancing the reform and development of digital educational resources in the new era.It classifies the current development and realistic challenges of China’s digital educational resources,and summaries and interprets the directions of the three construction projects of new type resources and tools,the resource supply system,and the resource supervisory system.It depicts the prospect of digital educational resource construction in the intelligent era in the combination of the strategic layout of the policies on new educational infrastructure construction.It also discusses such key technologies supporting new infrastructure construction of digital educational resources as multimodal learning analytics,disciplinary knowledge graphs,machine learning,and blockchain.It finally proposes a specific development path for new infrastructure construction of digital educational resources.
