[Objective] To fully grasp the living environment and the use of agricultural resources of Pumi nationality, a minority group specific in Yunnan. [Methods]Field investigation and analysis were conducted on the social ...[Objective] To fully grasp the living environment and the use of agricultural resources of Pumi nationality, a minority group specific in Yunnan. [Methods]Field investigation and analysis were conducted on the social economic conditions, living environment, types of agricultural resources and their use in the main inhabitances of Pumi people including Yulong, Ninglang, Lanping and Weixi County in Yunnan. [Result] There are certain differences in social and economic situations of the four counties, and the ecological environment is generally good. The main agricultural resources in villages under investigation include beans and coarse cereals, while there are certain differences among other agricultural resources due to their location. [Conclusion] The living environment of the main inhabitances of Pumi people in Yunnan is good and there are plenty and characteristic agricultural resources which have certain potentiality for development in the future.展开更多
Groundwater reservoir is a kind of important engineering, which can optimize water resources arran- gement by means of artificial regulation. Regulated water is the blood and value performance of groundwater reservoir...Groundwater reservoir is a kind of important engineering, which can optimize water resources arran- gement by means of artificial regulation. Regulated water is the blood and value performance of groundwater reservoir. To resolve the problem of real-time quantification of regulated water, the paper analyzed sources and compositions of regulated water in detail. Then, under the conditions of satisfying water demand inside research area, the paper analyzed quantity available and regulation coefficient of different regulated water and established a formula to calculate regulated water. At last, based on a pore groundwater reservoir in the middle reaches of the Yinma River, Jilin Province, the paper calculated regulated water with the formula and the result shows that the method is feasible. With some constraint conditions, the formula can be adopted in other similar areas.展开更多
Generally, the sequence decision of the development and utilization of Chinese mineral resources is based on national and provincial overall plan of the mineral resources. Such plan usually cannot reflect the relative...Generally, the sequence decision of the development and utilization of Chinese mineral resources is based on national and provincial overall plan of the mineral resources. Such plan usually cannot reflect the relative size of the suitability of the development and utilization of mineral resources. To solve the problem, the paper has selected the gift condition, the market condition, the technological condition,socio-economic condition and environmental condition as the starting-points to analyze the influential factors of the priority-sequence of mineral resources' development and utilization. The above 5 conditions are further specified into 9 evaluative indicators to establish an evaluation indicator system. At last,we propose a decision model of the priority sequence based on grey relational analysis method, and figure out the observation objects by the suitability index of development. Finally, the mineral resources of a certain province in China were analyzed as an example. The calculation results indicate that silver(2.0057), coal(1.9955), zinc(1.9442), cement limestone(1.9077), solvent limestone(1.5624) and other minerals in the province are suitable for development and utilization.展开更多
The genetic base that cotton breeders commonly use to improve Upland cultivars is very narrow.The AD-genome species Gossypium barbadense,G.tomentosum,and G.mustelinum are part of
China is lack of bromine and potassium seriously.Oilfield brines is the headline goal of bromine and potassium resources exploration.Applicants grab 24oilfield brines samples from various wells of Ordovician
Conflict between conservation and community livelihood is a significant issue in China.Based on Sustainable Livelihood Framework(SLA),this study systematically analyzed livelihoods assets of a community in a Yunnan sn...Conflict between conservation and community livelihood is a significant issue in China.Based on Sustainable Livelihood Framework(SLA),this study systematically analyzed livelihoods assets of a community in a Yunnan snub-nosed monkey conservation area and found that the livelihood pentagon of the community was shaped by multiple but frail and unstable income sources,abundant natural resources with restricted use right,underutilized labors,inadequate financial resources,inconvenient physical capital and weak social capital.Villagers'income heavily depended on forest,and grazing and nontimber forest products(NTFP)collection are common and major income sources for villagers.However,differentiation of income dependence on forest among villagers'groups showed that there is no close correlation between the level of income and the level of income dependence on forest.Households'daily life also heavily depended on the forest due to heating and pig-feed cooking;hence,fuelwood cannot be easily replaced by any other energy resource for a long period.展开更多
Information centric networking(ICN) is a new network architecture that is centred on accessing content. It aims to solve some of the problems associated with IP networks, increasing content distribution capability and...Information centric networking(ICN) is a new network architecture that is centred on accessing content. It aims to solve some of the problems associated with IP networks, increasing content distribution capability and improving users' experience. To analyse the requests' patterns and fully utilize the universal cached contents, a novel intelligent resources management system is proposed, which enables effi cient cache resource allocation in real time, based on changing user demand patterns. The system is composed of two parts. The fi rst part is a fi ne-grain traffi c estimation algorithm called Temporal Poisson traffi c prediction(TP2) that aims at analysing the traffi c pattern(or aggregated user requests' demands) for different contents. The second part is a collaborative cache placement algorithm that is based on traffic estimated by TP2. The experimental results show that TP2 has better performance than other comparable traffi c prediction algorithms and the proposed intelligent system can increase the utilization of cache resources and improve the network capacity.展开更多
The paper focuses on the optimal control of natural resources in mining industry. The purpose is to pro- pose an optimal extraction series of these resources during the lifetime of the Mine＇s maintenance. Fol- lowing...The paper focuses on the optimal control of natural resources in mining industry. The purpose is to pro- pose an optimal extraction series of these resources during the lifetime of the Mine＇s maintenance. Fol- lowing the proposed optimal control model, a sensitivity analysis has been performed that includes the interest rate impact on the optimal solution. This study shows that the increasing of the interest rate sti- mulates faster extraction of the resources. The discounting factor induces that the resource has to be extracted faster hut this effect is counterbalanced by the diminishing returns of the annual cash flow. At higher parameters of ＂alpha＂ close to one of the power function about 80% from the whole resource will be extracted during the first 4 years of object/mine maintenance. An existence of unique positive root with respect to return of investment has been proposed and proved by two ways： by the ＂method of chords＂ and by using specialized software.展开更多
The paper makes an empirical analysis on the main factors affecting IT corporate growth-human resource and R＆D. By using data of China＇s listed IT companies, we focus on the relationship among corporate value （net ...The paper makes an empirical analysis on the main factors affecting IT corporate growth-human resource and R＆D. By using data of China＇s listed IT companies, we focus on the relationship among corporate value （net return of equity, ROE） or development of COl＇porate value （Tobin＇s Q） and manager＇s salary, R＆D fee, R＆D employee etc. The conclusion shows that development of corporate value （Tobin＇s Q） has correlativity positive with the plurality of board chairman and general manager, independent directors＇ proportion, R＆D fee, and R＆D employees while it is non-obvious positive with salary of superior managers, holding stocks of general manager, capital investment, and negative with corporate scale. The conclusion is accordant with the development status of Chinese IT corporate.展开更多
Chromium,a strategic mineral resource in China,is widely used in high-precision equipment manufacturing.As the world's leading consumer and importer of chromite,China's external dependence exceeds 99%.The sign...Chromium,a strategic mineral resource in China,is widely used in high-precision equipment manufacturing.As the world's leading consumer and importer of chromite,China's external dependence exceeds 99%.The significant imbalance between domestic supply and demand seriously threatens national economic security.This study discusses the state of China's chromium resource supply from four aspects:the overview of domestic and global chromium resources,China's chromite production and import volume,the sources of imported chromite,and risk analysis.Considering the chromium industrial chain and factors such as production,consumption,and recovery tendency of chromium-bearing stainless steel,it is forecasted that China's demand for chromium ore will decline by 2040.This could considerably reduce the security situation of chromium resources.This study proposes five strategies for securing chromium resources:technological innovation,enhancing international cooperation and acquiring overseas resources,constructing a new pattern of“dual circulation”resource guarantee for sea-land transportation,encouraging chromium recycling,and building an emergency management system and strategic reserve mechanism for chromium resources.展开更多
1.The overall development of new energy vehicles was good in 2017.In early 2017,the new energy vehicle market was greatly affected by major policy adjustments such as drastic decline in new energy vehicle subsidies an...1.The overall development of new energy vehicles was good in 2017.In early 2017,the new energy vehicle market was greatly affected by major policy adjustments such as drastic decline in new energy vehicle subsidies and re-examination of the model catalogue.But China’s determination to vigorously promote the healthy development of the new energy vehicle industry has not changed.In March and April。展开更多
基金Supported by Special Fund for Fundamental Work of National Science and Technology(2006FY110700)Program of Scientific and Technological Innovation of Yunnan Province(2007C0219Z)~~
文摘[Objective] To fully grasp the living environment and the use of agricultural resources of Pumi nationality, a minority group specific in Yunnan. [Methods]Field investigation and analysis were conducted on the social economic conditions, living environment, types of agricultural resources and their use in the main inhabitances of Pumi people including Yulong, Ninglang, Lanping and Weixi County in Yunnan. [Result] There are certain differences in social and economic situations of the four counties, and the ecological environment is generally good. The main agricultural resources in villages under investigation include beans and coarse cereals, while there are certain differences among other agricultural resources due to their location. [Conclusion] The living environment of the main inhabitances of Pumi people in Yunnan is good and there are plenty and characteristic agricultural resources which have certain potentiality for development in the future.
基金Under the auspices of Scientific & Technological Development Project of Science & Technology Office, JilinProvince (No. 200104032)
文摘Groundwater reservoir is a kind of important engineering, which can optimize water resources arran- gement by means of artificial regulation. Regulated water is the blood and value performance of groundwater reservoir. To resolve the problem of real-time quantification of regulated water, the paper analyzed sources and compositions of regulated water in detail. Then, under the conditions of satisfying water demand inside research area, the paper analyzed quantity available and regulation coefficient of different regulated water and established a formula to calculate regulated water. At last, based on a pore groundwater reservoir in the middle reaches of the Yinma River, Jilin Province, the paper calculated regulated water with the formula and the result shows that the method is feasible. With some constraint conditions, the formula can be adopted in other similar areas.
基金Financial support from the key project of the National Natural Science Foundation of China(No.71273118)is gratefully acknowledged
文摘Generally, the sequence decision of the development and utilization of Chinese mineral resources is based on national and provincial overall plan of the mineral resources. Such plan usually cannot reflect the relative size of the suitability of the development and utilization of mineral resources. To solve the problem, the paper has selected the gift condition, the market condition, the technological condition,socio-economic condition and environmental condition as the starting-points to analyze the influential factors of the priority-sequence of mineral resources' development and utilization. The above 5 conditions are further specified into 9 evaluative indicators to establish an evaluation indicator system. At last,we propose a decision model of the priority sequence based on grey relational analysis method, and figure out the observation objects by the suitability index of development. Finally, the mineral resources of a certain province in China were analyzed as an example. The calculation results indicate that silver(2.0057), coal(1.9955), zinc(1.9442), cement limestone(1.9077), solvent limestone(1.5624) and other minerals in the province are suitable for development and utilization.
文摘The genetic base that cotton breeders commonly use to improve Upland cultivars is very narrow.The AD-genome species Gossypium barbadense,G.tomentosum,and G.mustelinum are part of
基金supported by Geological survey project (Project Number: 12120113078500)
文摘China is lack of bromine and potassium seriously.Oilfield brines is the headline goal of bromine and potassium resources exploration.Applicants grab 24oilfield brines samples from various wells of Ordovician
基金supported by the Nature Conservancy[grant number NA/KUNMING/YU030112]Yunnan Provincial Fund of Social Science[grant number YB2013024]
文摘Conflict between conservation and community livelihood is a significant issue in China.Based on Sustainable Livelihood Framework(SLA),this study systematically analyzed livelihoods assets of a community in a Yunnan snub-nosed monkey conservation area and found that the livelihood pentagon of the community was shaped by multiple but frail and unstable income sources,abundant natural resources with restricted use right,underutilized labors,inadequate financial resources,inconvenient physical capital and weak social capital.Villagers'income heavily depended on forest,and grazing and nontimber forest products(NTFP)collection are common and major income sources for villagers.However,differentiation of income dependence on forest among villagers'groups showed that there is no close correlation between the level of income and the level of income dependence on forest.Households'daily life also heavily depended on the forest due to heating and pig-feed cooking;hence,fuelwood cannot be easily replaced by any other energy resource for a long period.
基金supported by the National High Technology Research and Development Program(863)of China(No.2015AA016101)the National Natural Science Fund(No.61300184)Beijing Nova Program(No.Z151100000315078)
文摘Information centric networking(ICN) is a new network architecture that is centred on accessing content. It aims to solve some of the problems associated with IP networks, increasing content distribution capability and improving users' experience. To analyse the requests' patterns and fully utilize the universal cached contents, a novel intelligent resources management system is proposed, which enables effi cient cache resource allocation in real time, based on changing user demand patterns. The system is composed of two parts. The fi rst part is a fi ne-grain traffi c estimation algorithm called Temporal Poisson traffi c prediction(TP2) that aims at analysing the traffi c pattern(or aggregated user requests' demands) for different contents. The second part is a collaborative cache placement algorithm that is based on traffic estimated by TP2. The experimental results show that TP2 has better performance than other comparable traffi c prediction algorithms and the proposed intelligent system can increase the utilization of cache resources and improve the network capacity.
文摘The paper focuses on the optimal control of natural resources in mining industry. The purpose is to pro- pose an optimal extraction series of these resources during the lifetime of the Mine＇s maintenance. Fol- lowing the proposed optimal control model, a sensitivity analysis has been performed that includes the interest rate impact on the optimal solution. This study shows that the increasing of the interest rate sti- mulates faster extraction of the resources. The discounting factor induces that the resource has to be extracted faster hut this effect is counterbalanced by the diminishing returns of the annual cash flow. At higher parameters of ＂alpha＂ close to one of the power function about 80% from the whole resource will be extracted during the first 4 years of object/mine maintenance. An existence of unique positive root with respect to return of investment has been proposed and proved by two ways： by the ＂method of chords＂ and by using specialized software.
基金This project was supported by the National Social Science Foundation of China.
文摘The paper makes an empirical analysis on the main factors affecting IT corporate growth-human resource and R＆D. By using data of China＇s listed IT companies, we focus on the relationship among corporate value （net return of equity, ROE） or development of COl＇porate value （Tobin＇s Q） and manager＇s salary, R＆D fee, R＆D employee etc. The conclusion shows that development of corporate value （Tobin＇s Q） has correlativity positive with the plurality of board chairman and general manager, independent directors＇ proportion, R＆D fee, and R＆D employees while it is non-obvious positive with salary of superior managers, holding stocks of general manager, capital investment, and negative with corporate scale. The conclusion is accordant with the development status of Chinese IT corporate.
基金supported by the Consulting Research Project of the Chinese Academy of Engineering (Nos.2022-XY-82,2023-XY-21,and 2023-XZ-25).
文摘Chromium,a strategic mineral resource in China,is widely used in high-precision equipment manufacturing.As the world's leading consumer and importer of chromite,China's external dependence exceeds 99%.The significant imbalance between domestic supply and demand seriously threatens national economic security.This study discusses the state of China's chromium resource supply from four aspects:the overview of domestic and global chromium resources,China's chromite production and import volume,the sources of imported chromite,and risk analysis.Considering the chromium industrial chain and factors such as production,consumption,and recovery tendency of chromium-bearing stainless steel,it is forecasted that China's demand for chromium ore will decline by 2040.This could considerably reduce the security situation of chromium resources.This study proposes five strategies for securing chromium resources:technological innovation,enhancing international cooperation and acquiring overseas resources,constructing a new pattern of“dual circulation”resource guarantee for sea-land transportation,encouraging chromium recycling,and building an emergency management system and strategic reserve mechanism for chromium resources.
文摘1.The overall development of new energy vehicles was good in 2017.In early 2017,the new energy vehicle market was greatly affected by major policy adjustments such as drastic decline in new energy vehicle subsidies and re-examination of the model catalogue.But China’s determination to vigorously promote the healthy development of the new energy vehicle industry has not changed.In March and April。
