期刊文献+
共找到1,771篇文章
< 1 2 89 >
每页显示 20 50 100
A Research Program of Spherical Tokamak in China 被引量:6
1
作者 何也熙 《Plasma Science and Technology》 SCIE EI CAS CSCD 2002年第4期1355-1363,共9页
The mission of this program is to explore the spherical torus plasma with a SUNIST spherical tokamak. Main experiments in the start phase will be involved with breakdown and plasma current set-up with a mode of saving... The mission of this program is to explore the spherical torus plasma with a SUNIST spherical tokamak. Main experiments in the start phase will be involved with breakdown and plasma current set-up with a mode of saving volt-second and without ohmic heating system, equilibrium and instability, current driving, heating and profile modification. The SUNIST is a university-scale conceptual spherical tokamak, with R = 0.3 m, A 1.3, Ip - 50 kA, BT < 0.15 T, and PRF - 100 kW. The only peculiarity of SUNIST is that there is a toroidal insulating break along the outer wall of vacuum vessel. The expected that advantages of this arrangement are helpful not only for saving flux swing, but also for having a deep understanding of what will influence the discharge startup and globe performances of plasma under different conditions of strong vessel eddy and ECR power assistance. Of course, the vessel structure of cross seal will be at a great risk of controlling vacuum quality, although we have achieved positive results on simulation test and vacuum vessel test. 展开更多
关键词 spherical tokamak research program
在线阅读 下载PDF
National Basic Research Program of China (973 Program) Indo-Pacific Oceanic Channel Project Special Issue
2
作者 袁东亮 吴其冈 +1 位作者 陈葆德 王江海 《Journal of Oceanology and Limnology》 SCIE CAS CSCD 2018年第1期1-3,共3页
1 INTRODUCTION The tropical Indo-Pacific Oceans span over twothirds of the global tropical oceans.A major warm pool with the highest large-scale sea surface temperature of the global oceans is located in the western P... 1 INTRODUCTION The tropical Indo-Pacific Oceans span over twothirds of the global tropical oceans.A major warm pool with the highest large-scale sea surface temperature of the global oceans is located in the western Pacific and eastern Indian Oceans.The climate systems over the tropical Pacific and Indian Oceans are subject to strong ocean-atmosphere coupling at multiple scales from intraseasonal to interannual,and to centennial.The 展开更多
关键词 IOD ITF program National Basic research program of China
在线阅读 下载PDF
Friedrich Ackermann’s scientific research program
3
作者 Wolfgang Förstner 《Geo-Spatial Information Science》 SCIE EI CSCD 2023年第2期141-150,共10页
We sketch Friedrich Ackermann’s research program following the concept of Imre Lakatos,with some historical key developments in the theory and application of aerotriangulation and image matching.The research program,... We sketch Friedrich Ackermann’s research program following the concept of Imre Lakatos,with some historical key developments in the theory and application of aerotriangulation and image matching.The research program,with its core being statistical estimation theory,has decisively influenced photogrammetry since the 60s,is still fully alive,and a challenge for today’s methods of image interpretation.We describe(1)Lakatos’concept of a scientific research program,with its negative and positive heuristics and(2)Ackermann’s research program,clearly made explicit in his PhD,with its mathematical model,the ability to predict theoretical precision and reliability,the potential of analyzing rigorous and approximate method,and the role of testing.The development of aerotriangulation,later augmented by image matching techniques,is closely connected to Ackermann’s successful attempts to integrate basic research and practical applications. 展开更多
关键词 Friedrich Ackermann scientific research program aerotriangulation image matching role of theory and application
原文传递
Special Topic on Major Research Program: Catalysis Science for Carbon-based Energy Conversion
4
《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2017年第4期592-,共1页
The major research program,"Catalysis science for carbon-based energy conversion",from the national science foundation of China(NSFC)answers to the main strategic needs of China for the efficien use of carbo... The major research program,"Catalysis science for carbon-based energy conversion",from the national science foundation of China(NSFC)answers to the main strategic needs of China for the efficien use of carbon-based energy and targets to address the key scientifi issues involved in the catalytic interfaces.The research program aims to improve the catalytic activation of C–H and C–O bonds and the C–C coupling process, 展开更多
关键词 Catalysis Science for Carbon-based Energy Conversion Special Topic on Major research program
在线阅读 下载PDF
Study of Impacts of Small Business Innovation Research Programs
5
作者 CAO Yong-hui 《International Journal of Plant Engineering and Management》 2008年第3期174-180,共7页
The development and commercialization of new technologies are important to the global economy. In this paper, the author first addresses Small Business Innovation Research (SBIR) background ; then, implicitly define... The development and commercialization of new technologies are important to the global economy. In this paper, the author first addresses Small Business Innovation Research (SBIR) background ; then, implicitly defines SBIR ; finally, I also analyze the impacts of smaU business innovation research programs. There are four aspects : entrepreneurial orientation; environmental factors; organizational factors and performanee. 展开更多
关键词 small business innovation research programs entrepreneurial orientation environmental factors organizational factors PERFORMANCE
在线阅读 下载PDF
China to Open State Research Program to Overseas Scientists
6
《Bulletin of the Chinese Academy of Sciences》 2000年第3期128-128,共1页
China will open part of its civil projects in national research program, including hi-tech development programs and major basic research programs to overseas scientists, said a senior official with the Ministry of Sci... China will open part of its civil projects in national research program, including hi-tech development programs and major basic research programs to overseas scientists, said a senior official with the Ministry of Science and Technology (MOST). Facing the globalization trend in terms of economy and S&T development, China will take a 展开更多
关键词 OPEN MOST China to Open State research program to Overseas Scientists
在线阅读 下载PDF
Foreign Scientists Join National Research Program for the First Time
7
《Bulletin of the Chinese Academy of Sciences》 2000年第4期198-198,共1页
Aproposal to carry out research into the chemistry of molecular agglomerate, jointly made by Tong Zhenhe with CAS Institute of Physical and Chemical Technologies, Jiang Xikui with Shanghai Institute of Organic Chemist... Aproposal to carry out research into the chemistry of molecular agglomerate, jointly made by Tong Zhenhe with CAS Institute of Physical and Chemical Technologies, Jiang Xikui with Shanghai Institute of Organic Chemistry, Shen Jiaocong of Jilin University, and two German and 展开更多
关键词 Foreign Scientists Join National research program for the First Time
在线阅读 下载PDF
Eighty research programs win medical science awards
8
作者 Xinhuanet 《Chinese Medical Journal》 SCIE CAS CSCD 2006年第3期249-249,共1页
Eighty medical science research programs won national awards at the Great Hall of the People here Monday, with more than 2000 representatives from the sector attending the award ceremony.
关键词 CMA Eighty research programs win medical science awards
原文传递
Marine Research Accomplishments by CAS under National 863 Program
9
作者 Guo Yaxi(Bureau of Science & Technology for Resources & Environment, CAS) 《Bulletin of the Chinese Academy of Sciences》 2002年第2期94-101,共8页
This article gives a systematic and comprehensive summary of the marine research results ac complished by the Chinese Academy of Sciences (CAS) with the support of the National High-tech Research and Development Progr... This article gives a systematic and comprehensive summary of the marine research results ac complished by the Chinese Academy of Sciences (CAS) with the support of the National High-tech Research and Development Program during the period of the Ninth Five-year Plan (1996 - 2000). It includes achievements in the exploitation of marine resources, protection of the marine environment, reduction of marine disasters and the safeguarding of national marine sovereignty. 展开更多
关键词 CAS Marine research Accomplishments by CAS under National 863 program
在线阅读 下载PDF
Practice on Capability Accreditation Program(CAP)of Ethics Review System for Chinese Medicine Research
10
作者 Xu Chunbo Liu Qiang Guan Zitong 《World Journal of Integrated Traditional and Western Medicine》 2018年第2期24-28,共5页
Capability Accreditation Program(CAP) of Ethics Review System for Chinese Medicine Research of World Federation of Chinese Medicine Societies(WFCMS) is the first certification project in the field of Chinese medicine ... Capability Accreditation Program(CAP) of Ethics Review System for Chinese Medicine Research of World Federation of Chinese Medicine Societies(WFCMS) is the first certification project in the field of Chinese medicine research on ethics review. Based on the Requirements for Ethical Review of Biomedical Research Involving Human, ethical review system for Chinese medicine research was established and standardized from 4 aspects, such as organization, ethics committee, office of the ethics committee, and researchers. The period of CAP certification is three years, which include certification application and acceptance, initial certification(document review, on-site audit), certification decision, and supervision audit. The implementation of the CAP certification is of great importance for upgrading the research on ethics review system of Chinese medicine, which promotes the development of the research on ethics review system in China and the continuous improvement of the ability of the Chinese medicine research on ethics review. 展开更多
关键词 CAPABILITY ACCREDITATION program ACCREDITATION Clinical research ETHICS committee
暂未订购
Mash1 efficiently reprograms rat astrocytes into neurons 被引量:2
11
作者 Daofang Ding Leqin Xu +4 位作者 Hao Xu Xiaofeng Li Qianqian Liang Yongjian Zhao Yongjun Wang 《Neural Regeneration Research》 SCIE CAS CSCD 2014年第1期25-32,共8页
To date, it remains poorly understood whether astrocytes can be easily reprogrammed into neurons. Mashl and Brn2 have been previously shown to cooperate to reprogram fibroblasts into neurons. In this study, we examine... To date, it remains poorly understood whether astrocytes can be easily reprogrammed into neurons. Mashl and Brn2 have been previously shown to cooperate to reprogram fibroblasts into neurons. In this study, we examined astrocytes from 2-month-old Sprague-Dawley rats, and found that Brn2 was expressed, but Mashl was not detectable. Thus, we hypothesized that Mashl alone could be used to reprogram astrocytes into neurons. We transfected a recombinant MSCV-MASH1 plasmid into astrocytes for 72 hours, and saw that all cells expressed Mashl. One week later, we observed the changes in morphology of astrocytes, which showed typical neuro- nal characteristics. Moreover, β-tubulin expression levels were significantly higher in astrocytes expressing Mashl than in control cells. These results indicate that Mashl alone can reprogram astrocytes into neurons. 展开更多
关键词 nerve regeneration Mash-l Brn2 Β-TUBULIN reprogram PLASMID RETROVIRUS ASTROCYTES NEURONS the National Basic research program of China (973 program neural regeneration
暂未订购
Science Researches of Chinese Manned Space Flight 被引量:2
12
作者 GU Yidong GAO Ming +2 位作者 ZHAO Guangheng LIU Yingchun JIN Zhaojun 《空间科学学报》 CAS CSCD 北大核心 2014年第5期518-524,共7页
With the complete success of the 2nd stage of Chinese Manned Space Program(CMSP),several science researches have been performed on Tiangong-1 experimental spacelab, which was docked with three Shenzhou spaceships one ... With the complete success of the 2nd stage of Chinese Manned Space Program(CMSP),several science researches have been performed on Tiangong-1 experimental spacelab, which was docked with three Shenzhou spaceships one after another. The China's real spacelab, Tiangong-2 will be launched in 2015, docked with a Shenzhou spaceship soon. After six months, it will be docked with the first Chinese cargo ship(Tianzhou-1). More space science researches, involving with space biology, fluid physics, fundamental physics, materials science, Earth science, astronomy and space environmental science, will be operated on Tiangong-2 spacelab, and crewed and cargo spaceships. Furthermore, the considerable large-scale space utilization of Shina's Space Station is planned. The research fields include yet not limited to space medicine and physiology, space life science and biotechnology, fluid physics and combustion in microgravity, space material science,and fundamental physics in microgravity, space astronomy, Earth science, space physics and space environment utilization, technology demonstration. 展开更多
关键词 SCIENCE research CHINESE MANNED SPACE program(CMSP) SPACE STATION
在线阅读 下载PDF
The Elite Strategies in the CIMS Subject of China 863 Program (1986-2000)
13
作者 赵新力 Zhang Chao 《High Technology Letters》 EI CAS 2003年第1期64-67,共4页
Manpower is the key factor to the success of the CIMS Subject of China 863 Program. Many manpower strategies have been used in the CIMS Subject, which include elite strategies, training and practicing strategies, and ... Manpower is the key factor to the success of the CIMS Subject of China 863 Program. Many manpower strategies have been used in the CIMS Subject, which include elite strategies, training and practicing strategies, and culture strategies. This paper is mainly about the elite strategies such as to discover the talents, to cultivate the elites and to establish the mechanism for the expert groups to work in team, echelon and vigor. 展开更多
关键词 CIMS MANPOWER STRATEGIES management HI-TECH national research and development program
在线阅读 下载PDF
Optimality conditions and duality for a class of nondifferentiable multiobjective generalized fractional programming problems 被引量:1
14
作者 GAO Ying RONG Wei-dong 《Applied Mathematics(A Journal of Chinese Universities)》 SCIE CSCD 2008年第3期331-344,共14页
This paper studies a class of multiobjective generalized fractional programming problems, where the numerators of objective functions are the sum of differentiable function and convex function, while the denominators ... This paper studies a class of multiobjective generalized fractional programming problems, where the numerators of objective functions are the sum of differentiable function and convex function, while the denominators are the difference of differentiable function and convex function. Under the assumption of Calmness Constraint Qualification the Kuhn-Tucker type necessary conditions for efficient solution are given, and the Kuhn-Tucker type sufficient conditions for efficient solution are presented under the assumptions of (F, α, ρ, d)-V-convexity. Subsequently, the optimality conditions for two kinds of duality models are formulated and duality theorems are proved. 展开更多
关键词 operations research multiobjective generalized fractional programming optimality condition duality theorem generalized convexity
在线阅读 下载PDF
The National Estuarine Research Reserve System: A Review of Research and Monitoring Initiatives
15
作者 Michael J. Kennish 《Open Journal of Ecology》 2019年第3期50-65,共16页
The National Estuarine Research Reserve System (NERRS) is an integrated network of 29 protected and coordinated estuarine reserve sites in 23 states and one territory (Puerto Rico) covering more than 525,000 ha of est... The National Estuarine Research Reserve System (NERRS) is an integrated network of 29 protected and coordinated estuarine reserve sites in 23 states and one territory (Puerto Rico) covering more than 525,000 ha of estuarine habitat, adjoining wetlands, and uplands that encompass 19 biogeographical regions along the Atlantic, Gulf of Mexico, and Pacific coasts, as well as the Caribbean Sea and Great Lakes. NERRS is an ecosystem-based research and monitoring network of sites serving as platforms to develop quantitative databases of value to coastal management programs in identifying and tracking short-term variability and long-term changes in the integrity and biodiversity of estuarine systems nationwide due to natural perturbations and anthropogenic disturbances. The reserve sites also play a vital role in assessing coastal issues of local, regional, and national significance for the purpose of sustaining estuarine systems and coastal lands, such as evaluating their responses to climate change and other major stressors to inform coastal decision-making and public awareness for the protection and resilience of natural resources and coastal communities. Over the past four decades, NERRS sites have collected large volumes of research and monitoring data of great utility in characterizing estuarine environments and addressing an array of resource-management concerns, including degraded water quality, loss and alteration of essential habitat, impacted fisheries, invasive species, and conservation. 展开更多
关键词 NERRS Estuaries System-Wide MONITORING program Integrated research SENTINEL SITES Climate Change
暂未订购
An Integer Programming Model for the KenKen Problem 被引量:2
16
作者 Vardges Melkonian 《American Journal of Operations Research》 2016年第3期213-225,共13页
In this paper we consider modeling techniques for the mathematical puzzle KenKen. It is an interesting puzzle from modeling point of view since it has different kind of mathematical restrictions that are not trivial t... In this paper we consider modeling techniques for the mathematical puzzle KenKen. It is an interesting puzzle from modeling point of view since it has different kind of mathematical restrictions that are not trivial to express as linear constraints. We give an integer program for solving KenKen and and its implementation on modeling language AMPL. Our integer program uses an innovative way for converting product restrictions into linear constraints. It can be also used for teaching various integer programming techniques in an Operations Research course. 展开更多
关键词 Integer programming Mathematical Games Education Operations research Discrete Optimization
在线阅读 下载PDF
全球教育环境下国际中文教育项目的现状与展望 被引量:3
17
作者 郑艳群 刘冰 《青海民族大学学报(社会科学版)》 2025年第1期185-190,共6页
在全球化和数字化背景下,国际中文教育项目呈现出多样性和创新性的发展趋势。本文回顾了20世纪以来国际中文教育项目的发展历程,梳理其在培养周期、培养对象、办学背景、办学主体、办学形式及教学目标等方面的演变,揭示其显著特征。研... 在全球化和数字化背景下,国际中文教育项目呈现出多样性和创新性的发展趋势。本文回顾了20世纪以来国际中文教育项目的发展历程,梳理其在培养周期、培养对象、办学背景、办学主体、办学形式及教学目标等方面的演变,揭示其显著特征。研究认为,通过优化项目设计与实施、加强国际合作与资源共享、构建高素质师资队伍与跨国教师联盟等路径,能够有效推动国际中文教育项目的可持续与高质量发展,适应新时期国际中文教育的需求。 展开更多
关键词 国际中文教育项目 全球化 数字化 研究现状 发展趋势
在线阅读 下载PDF
美国甲烷水合物研发计划发展历程及进展
18
作者 邵明娟 张炜 +2 位作者 王海华 姚树青 孙张涛 《中国地质调查》 2025年第3期19-26,共8页
美国于2000年设立了国家级水合物研发计划,20多年来在各个领域取得了丰硕的成果,并已于2024年7月30日完成了全球首次长期陆域试采。介绍了美国的能源政策对水合物研发工作的部署影响,并对美国水合物研发计划的组织结构和经费投入情况进... 美国于2000年设立了国家级水合物研发计划,20多年来在各个领域取得了丰硕的成果,并已于2024年7月30日完成了全球首次长期陆域试采。介绍了美国的能源政策对水合物研发工作的部署影响,并对美国水合物研发计划的组织结构和经费投入情况进行整理,重点对水合物研发计划下设立的98个项目进行梳理,按照资源勘查与评价、生产技术、室内实验与数值模拟和环境效应领域进行分类分析,以查清美国水合物研发计划的发展趋势,并对计划的成果亮点进行了总结。分析认为:美国的水合物研发计划组织合理有力,充分利用了政府机构、高校、科研机构和私企各自的优势力量;计划部署有序,基础科学研究、资源勘查评价、试采协同发展,互相促进;水合物研发受能源政策的影响,近些年有渐冷趋势。研究成果可为我国提高水合物产业开发能力提供借鉴和资料参考。 展开更多
关键词 美国 甲烷水合物 研发计划 能源政策 试采
在线阅读 下载PDF
《铁路技术管理规程》产学研用方案构建研究
19
作者 薛锋 杨颖 +3 位作者 李佳霖 左大杰 张守帅 保鲁昆 《铁道运输与经济》 北大核心 2025年第6期146-153,共8页
铁路技术规章对于保障铁路运输安全,提高运输效率至关重要。基于对产学研用方案的构成要素及指标分析,从产、学、研、用4个方面出发,提出了《铁路技术管理规程》产学研用方案指标体系构建思路;运用平均集对势,对专家给出的指标重要性排... 铁路技术规章对于保障铁路运输安全,提高运输效率至关重要。基于对产学研用方案的构成要素及指标分析,从产、学、研、用4个方面出发,提出了《铁路技术管理规程》产学研用方案指标体系构建思路;运用平均集对势,对专家给出的指标重要性排序的合理性进行评估,根据基于相对联系数的产学研用方案指标体系筛选方法,对初始指标体系进行了优化筛选,识别重要指标,保留了原始二级指标的60%,结果表明,实践教学比重、投入的研发人员数量等指标对于构建产学研用方案具有重要作用;通过最终确定的49个指标,并结合主管部门、铁路企业、用户、高校和科研机构5个主体构建了《铁路技术管理规程》的产学研用方案,为铁路运输的高质量发展提供理论支撑。 展开更多
关键词 铁路技术管理规程 产学研用方案 相对联系数 指标筛选 平均集对势
在线阅读 下载PDF
Optimization of Urban Rail Transportation in Emerging Countries Using Operational Research Techniques
20
作者 M. C. Agarana T. A. Anake H. I. Okagbue 《Applied Mathematics》 2016年第10期1116-1123,共8页
Rail systems are gradually becoming the most desirable form of transit infrastructure around the world, partly because they are becoming more environmentally friendly compared with airplanes and automobiles. This pape... Rail systems are gradually becoming the most desirable form of transit infrastructure around the world, partly because they are becoming more environmentally friendly compared with airplanes and automobiles. This paper examines the place of emerging countries in this move of implementing modern rail system that will eventually enhance the realization of a low-carbon society. Network model, transportation model and linear programming algorithms are used to model the present urban rail transport system in Nigeria, as an emerging country, in order to optimize it. Operational research methods, including simplex method and MODI, with the aids of computer software (excel solver and LIP solver) were adopted to solve the resulting models. The results showed that optimization of rail transport system will not only reduce carbon emission but also bring about economic development which is required for the eradication of prevalent poverty in these emerging countries. 展开更多
关键词 Rail System Emerging Countries Operational research Network Model Transportation Model Linear programming Algorithm
在线阅读 下载PDF
上一页 1 2 89 下一页 到第
使用帮助 返回顶部