The Hani Rice Terraces System, based on gravity-flow irrigation, is one of the Globally Important Agricultural Heritage Systems(GIAHS) pilot sites selected by FAO in 2010. The water resource plays an important role in...The Hani Rice Terraces System, based on gravity-flow irrigation, is one of the Globally Important Agricultural Heritage Systems(GIAHS) pilot sites selected by FAO in 2010. The water resource plays an important role in the sustainable development of this system. The value of water conserved by the forest is influenced by natural, economic and social factors. In this paper, the water quality, per capita water resources, per capita GDP and population density are chosen as indices to construct an index system for a comprehensive evaluation of water resources value. The weights of these indices are 0.443, 0.31, 0.141 and 0.106 respectively, which are determined by the analytic hierarchy process(AHP) method. The water resources value has been assessed by the fuzzy comprehensive evaluation model. The results show that the water resources value in the Hani Rice Terraces System is 4.25 RMB/m^3. Evaluating the value of water resources in the Hani Rice Terraces System can provide a reference for ecological compensation, for raising public awareness of the importance of protecting the system, and ultimately achieving its sustainable development.展开更多
Qaidam Basin in Qinghai Province has rich multiple complex resources with salt lakes as the core.These resources form a special condition for the development of green economy,having rare and particular nature.The
As soon as the Chinese Academy of Sciences(CAS)was founded by the new government of the People’s Republic of China in 1949,the principles of“linking theory with practice”and“conducting research to serve the people...As soon as the Chinese Academy of Sciences(CAS)was founded by the new government of the People’s Republic of China in 1949,the principles of“linking theory with practice”and“conducting research to serve the people”set the framework for its scientific studies.How to balance their obligations to facilitate national economic construction with their desires to advance disciplinary scientific developments posed a knotty problem that frustrated those who organized and engaged in scientific research across the country,and in the CAS in particular.Against this background,the slogan“let tasks lead disciplines”was proposed as an effective solution.However,how exactly to put this into practice became a pressing issue,as CAS scientists and scholars debated the relationship between tasks and advances within scientific disciplines.This paper examines these debates as they were carried out in the case of the comprehensive surveys of natural resources organized by the CAS,focusing especially on different understandings of the relationship between“tasks”and“disciplines”within the CAS in the early 1960s,and examining the impact and legacy of“letting tasks lead disciplinary developments,”with possible lessons for the formulation of scientific plans today.展开更多
consists of forecasting for the total reserves of regional mineral resources and evaluation,compreIn general,based on evaluated objects and factors involved,evaluation of mineral resources hensive evaluation of region...consists of forecasting for the total reserves of regional mineral resources and evaluation,compreIn general,based on evaluated objects and factors involved,evaluation of mineral resources hensive evaluation of regional mineral resources, and economic and technical evaluation of deposits. Here a region can be a country, a province, or a mining area, while a deposit is mainly related to a single type of mineral, although it can contain more than one types of minerals. In the past, to assess mineral resources was primarily to evaluate and forecast the total reserves of regional mineral resources. With the advancement of science, technology, and economy, the evaluation of mineral resources has developed from forecasting the reserves of them to comprehensively evaluating them on the basis of numerous factors.展开更多
The pattern of groundwater usage and industrial development in the Sanjiang Plain remains a concern of Chinese government. In accordance with the Water Conservancy Planning of the Sanjiang Plain, this paper presents a...The pattern of groundwater usage and industrial development in the Sanjiang Plain remains a concern of Chinese government. In accordance with the Water Conservancy Planning of the Sanjiang Plain, this paper presents a Sanjiang Plain resources allocation model which is established to be used in controlling water, land, ecology and economy in consideration of 50%-level and 75%-level years, planting structure adjustment, industry development by 2020, and different transit water exploitation schemes. Lingo10 global optimization has been adopted in solving the model. The results show that by 2020 the output of three industries will increase to a certain degree, the grain yields will satisfy state demand, and regional service value will decrease dramatically. Such results provide theoretical basis and practical significance for instructing the development and exploitation of the Sanjiang Plain.展开更多
Baosteel＇s steelmaking has developed greatly over the last 30 years in the areas of hot metal pretreatment, converter, electric arc furnace （EAF）, secondary refining, continuous casting, stainless steel and the com...Baosteel＇s steelmaking has developed greatly over the last 30 years in the areas of hot metal pretreatment, converter, electric arc furnace （EAF）, secondary refining, continuous casting, stainless steel and the comprehensive utilization of resources. The development of technologies, such as clean steel production, mhrstahl heraeus （RH） vacuum refining,a breakout prediction system for slab continuous casting and rotary cylinder slag treatment has created a good environment for the development of value-added products and the comprehensive utilization of resources at Baosteel. This paper describes the direction of development of Baosteel＇ s steelmaking in the future.展开更多
A brief introduction to Baosteel's steelmaking plant,the increase of its crude steel output and development of its product variety in the past 25 years is given in this paper.The technical progress in hot metal pr...A brief introduction to Baosteel's steelmaking plant,the increase of its crude steel output and development of its product variety in the past 25 years is given in this paper.The technical progress in hot metal pretreatment,converter,secondary refining,continuous casting,comprehensive utilization of resources and environmental protection is also introduced.The present situation and level of the technologies,such as production of clean steel,RH vacuum refining,breakout prediction system of slab continuous casting, electromagnetic stirring and slag treatment by a rotary cylinder at Baosteel are described as well.These technologies provided good conditions for developing high value-added products and comprehensive utilization of resources at Baosteel.The future development trend of steelmaking technology of Baosteel is proposed.展开更多
Using earth satellite observation means, remote sensing information distilled technique and regional research production, we have roundly analyzed and made an integrated evaluation about the Lop Nur nuclear test field...Using earth satellite observation means, remote sensing information distilled technique and regional research production, we have roundly analyzed and made an integrated evaluation about the Lop Nur nuclear test field in western China. This product reveals the rarely-known nuke explosion effect and response events of geology conditions. It also offers us legible and practical first-hand materials about human extreme effects, important engineering environment and intimidating influence process. By excavating and appraising the materials gradually on the natural environment factors changing in the test field through macroscopic elimination and typical filtration, it can supply basic scientific data for security of national nuclear usage, appraising the nuclear environment synthetically and developing nuclear strategy expediently.展开更多
基金financially supported by the National Natural Science Fund, China (Grant Nos. 31200376, 41201586)the CAS Visiting Professor-Ship for Senior International Scientists (Grant No. 2013T2Z0011)
文摘The Hani Rice Terraces System, based on gravity-flow irrigation, is one of the Globally Important Agricultural Heritage Systems(GIAHS) pilot sites selected by FAO in 2010. The water resource plays an important role in the sustainable development of this system. The value of water conserved by the forest is influenced by natural, economic and social factors. In this paper, the water quality, per capita water resources, per capita GDP and population density are chosen as indices to construct an index system for a comprehensive evaluation of water resources value. The weights of these indices are 0.443, 0.31, 0.141 and 0.106 respectively, which are determined by the analytic hierarchy process(AHP) method. The water resources value has been assessed by the fuzzy comprehensive evaluation model. The results show that the water resources value in the Hani Rice Terraces System is 4.25 RMB/m^3. Evaluating the value of water resources in the Hani Rice Terraces System can provide a reference for ecological compensation, for raising public awareness of the importance of protecting the system, and ultimately achieving its sustainable development.
文摘Qaidam Basin in Qinghai Province has rich multiple complex resources with salt lakes as the core.These resources form a special condition for the development of green economy,having rare and particular nature.The
文摘As soon as the Chinese Academy of Sciences(CAS)was founded by the new government of the People’s Republic of China in 1949,the principles of“linking theory with practice”and“conducting research to serve the people”set the framework for its scientific studies.How to balance their obligations to facilitate national economic construction with their desires to advance disciplinary scientific developments posed a knotty problem that frustrated those who organized and engaged in scientific research across the country,and in the CAS in particular.Against this background,the slogan“let tasks lead disciplines”was proposed as an effective solution.However,how exactly to put this into practice became a pressing issue,as CAS scientists and scholars debated the relationship between tasks and advances within scientific disciplines.This paper examines these debates as they were carried out in the case of the comprehensive surveys of natural resources organized by the CAS,focusing especially on different understandings of the relationship between“tasks”and“disciplines”within the CAS in the early 1960s,and examining the impact and legacy of“letting tasks lead disciplinary developments,”with possible lessons for the formulation of scientific plans today.
文摘consists of forecasting for the total reserves of regional mineral resources and evaluation,compreIn general,based on evaluated objects and factors involved,evaluation of mineral resources hensive evaluation of regional mineral resources, and economic and technical evaluation of deposits. Here a region can be a country, a province, or a mining area, while a deposit is mainly related to a single type of mineral, although it can contain more than one types of minerals. In the past, to assess mineral resources was primarily to evaluate and forecast the total reserves of regional mineral resources. With the advancement of science, technology, and economy, the evaluation of mineral resources has developed from forecasting the reserves of them to comprehensively evaluating them on the basis of numerous factors.
基金supported by Ministry of Water resources Public Industry Research Special Funds for Projects (No.201101022)Supported by the Fundamental Research Funds for the Central Universities (No.2011B02014)
文摘The pattern of groundwater usage and industrial development in the Sanjiang Plain remains a concern of Chinese government. In accordance with the Water Conservancy Planning of the Sanjiang Plain, this paper presents a Sanjiang Plain resources allocation model which is established to be used in controlling water, land, ecology and economy in consideration of 50%-level and 75%-level years, planting structure adjustment, industry development by 2020, and different transit water exploitation schemes. Lingo10 global optimization has been adopted in solving the model. The results show that by 2020 the output of three industries will increase to a certain degree, the grain yields will satisfy state demand, and regional service value will decrease dramatically. Such results provide theoretical basis and practical significance for instructing the development and exploitation of the Sanjiang Plain.
文摘Baosteel＇s steelmaking has developed greatly over the last 30 years in the areas of hot metal pretreatment, converter, electric arc furnace （EAF）, secondary refining, continuous casting, stainless steel and the comprehensive utilization of resources. The development of technologies, such as clean steel production, mhrstahl heraeus （RH） vacuum refining,a breakout prediction system for slab continuous casting and rotary cylinder slag treatment has created a good environment for the development of value-added products and the comprehensive utilization of resources at Baosteel. This paper describes the direction of development of Baosteel＇ s steelmaking in the future.
文摘A brief introduction to Baosteel's steelmaking plant,the increase of its crude steel output and development of its product variety in the past 25 years is given in this paper.The technical progress in hot metal pretreatment,converter,secondary refining,continuous casting,comprehensive utilization of resources and environmental protection is also introduced.The present situation and level of the technologies,such as production of clean steel,RH vacuum refining,breakout prediction system of slab continuous casting, electromagnetic stirring and slag treatment by a rotary cylinder at Baosteel are described as well.These technologies provided good conditions for developing high value-added products and comprehensive utilization of resources at Baosteel.The future development trend of steelmaking technology of Baosteel is proposed.
基金The State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chi-nese Academy of Sciences, the open fund item (No. SKLLQG0701) to subsidizedthe constructprogram of the key discipline in Hunan Province, China, the fund item (No. D2007001) the State Key Labo-ratories of Continental Dynamics,Northwest University, the open fund item (No. DL2006001) to combine subsi-dized.
文摘Using earth satellite observation means, remote sensing information distilled technique and regional research production, we have roundly analyzed and made an integrated evaluation about the Lop Nur nuclear test field in western China. This product reveals the rarely-known nuke explosion effect and response events of geology conditions. It also offers us legible and practical first-hand materials about human extreme effects, important engineering environment and intimidating influence process. By excavating and appraising the materials gradually on the natural environment factors changing in the test field through macroscopic elimination and typical filtration, it can supply basic scientific data for security of national nuclear usage, appraising the nuclear environment synthetically and developing nuclear strategy expediently.
