|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | METAMORPHIC MECHANISMSAND THEIR CONFIGURATION MODELS显示文摘The concept of metamorphic mechanisms is presented, configuration models and configuration transformations relating to a set of new matrix operations are discussed and proposed. The configuration of a metamorphic mechanism reflects the connectivity change in the mechanism during motions which results in mobility change and presents the characteristics of the mechanism which is discussed in various applications particularly in decorative artifacts. The characteristics is further investigated with mobility analysis. | Dai Jiansheng (Department of Mechanical Engineering, School of Physical Sciences and Engineering, King’s College, University of London,Strand,London WC2R 2LS, United kingdom) Zhang Qixian (Robotics Research Institute,Beijing University of Aeronautics and | 2000 | Chinese Journal of Mechanical Engineering2000，13，3： | 61 |
| 2 | New development thoughts on the bio-inspired intelligence based control for unmanned combat aerial vehicle显示文摘Bio-inspired intelligence is in the spotlight in the field of international artificial intelligence,and unmanned combat aerial vehicle(UCAV),owing to its potential to perform dangerous,repetitive tasks in remote and hazardous,is very promising for the technological leadership of the nation and essential for improving the security of society.On the basis of introduction of bioinspired intelligence and UCAV,a series of new development thoughts on UCAV control are proposed,including artificial brain based high-level autonomous control for UCAV,swarm intelligence based cooperative control for multiple UCAVs,hy-brid swarm intelligence and Bayesian network based situation assessment under complicated combating environments, bio-inspired hardware based high-level autonomous control for UCAV,and meta-heuristic intelligence based heterogeneous cooperative control for multiple UCAVs and unmanned combat ground vehicles(UCGVs).The exact realization of the proposed new development thoughts can enhance the effectiveness of combat,while provide a series of novel breakthroughs for the intelligence,integration and advancement of future UCAV systems. | DUAN HaiBin 1 ,SHAO Shan 2 ,SU BingWei 3 &ZHANG Lei 41 State Key Laboratory of Science and Technology on Holistic Flight Control,School of Automation Science and Electrical Engineering, Beijing University of Aeronautics and Astronautics,Beijing 100191,China 2 Flight Control Department,Shenyang Aircraft Design and Research Institute,Shenyang 110035,China 3 Beijing Institute of Near Space Vehicle’s System Engineering,Beijing 100076,China 4Integration and Project Section,Air Force Equipment Academy,Beijing 100085,China | 2010 | Science China(Technological Sciences)2010，53，8： | 32 |
| 3 | Draining Tangjiashan Barrier Lake after Wenchuan Earthquake and the flood propagation after the dam break显示文摘Tangjiashan Barrier Lake is one of the largest barrier lakes caused by the Wenchuan Earthquake. Its risk analysis, emergency plan and effect of the emergency plan are introduced in this paper. The dam height of Tangjiashan Barrier Dam is about 105 m, and the reservoir storage capacity is 3.2×108 m3. When the dam broke the flood peak were estimated to be larger than 48000 m3/s, which might cause a enormous disaster to the downstream cities and residents. A discharge channel with 13 m deep and 8 m wide was drug, so that the water may flow out of the lake before the dam breaks. As a result, the drainage and risk mitigation project are successful. During the drainage process, the flood peak was about 6500 m3/s, and about 1.6×108 m3 of water was drained off and the residual reservoir capacity was only 8.97×107 m3. A new channel with average width 100 m was formed, which can bear floods of 200 years frequency. The successful experience and the collected data can be used to deal with the similar natural disasters in future. | LIU Ning1, ZHANG JianXin2, LIN Wei3, CHENG WuYI4 & CHEN ZuYu5 1 Ministry of Water Resources of the People’s Republic of China, Beijing 100053, China 2 Bureau of Hydrology of the Ministry of Water Resources of the People’s Republic of China, Beijing 100053, China 3 Sichuan Hydrographic and Water Resources Survey Bureau Chengdu 610031, China 4 HydroChina Chengdu Engineering Corporation, Chengdu 610072, China 5 China Institute of Water Resources and Hydropower Research, Beijing 100044, China | 2009 | Science China(Technological Sciences)2009，52，4： | 29 |
| 4 | Some Concepts and Mathematical Consideration of Similarity System Theory | ZHOU MeiliDepartment of Mechanical Engineering, Anhui Institute of Technology 111 Lu An Road, Hefei 230069, the People’s Republic of China | 1992 | Systems Science and Systems Engineering1992，2，1： | 17 |
| 5 | THE IMPROVEMENT OF ELECTRON FIELD EMISSION FROM AMORPHOUS CARBON FILMS DUE TO HYDROGEN PLASMA CHEMICAL ANNEALING EFFECT显示文摘Hydrogenated amorphous carbon films were fabricated by using layer-by-layer deposition method and hydrogen dilution method in a small d.c.-assisted plasma enhanced chemical vapor deposition system. It was found that the hydrogen plasma treatment could change the sp2/sp3 ratio to some extent by chemical etching. The improvements of field emission characteristics were observed compared with that from conventionally deposited a-C films, which can be attributed to the large field enhancement effect due to the inhomogeneous distribution of nanometer scale sp2 clusters and the reduction of the surface emission barrier due to the hydrogen termination. | J. Xu, X.H. Huang, L. Wang, W. Li and K.J. Chen (National Laboratory of Solid State Microstructures and Departmeat of Physics, Nanjing University, Nanjing 210093, China) J.B. Xu (Department of Electronic Engineering, The Chinese University of Hong Kong, S | 2001 | Acta Metallurgica Sinica(English Letters)2001，14，6： | 15 |
| 6 | Molecular dynamics simulations on the structures and properties of ε-CL-20-based PBXs ——Primary theoretical studies on HEDM formulation design显示文摘Five polymer bonded explosives (PBXs) with the base explosive ε-CL-20 (hexanitrohexaazaisowurtzi- tane), the most important high energy density compound (HEDC), and five polymer binders (Estane 5703, GAP, HTPB, PEG, and F2314) were constructed. Molecular dynamics (MD) method was employed to investigate their binding energies (Ebind), compatibility, safety, mechanical properties, and energetic properties. The information and rules were reported for choosing better binders and guiding formula- tion design of high energy density material (HEDM). According to the calculated binding energies, the ordering of compatibility and stability of the five PBXs was predicted as ε-CL-20/PEG > ε-CL-20/ Estane5703 ≈ε-CL-20/GAP > ε-CL-20/HTPB > ε-CL-20/F2314. By pair correlation function g(r) analyses, hydrogen bonds and vdw are found to be the main interactions between the two components. The elasticity and isotropy of PBXs based ε-CL-20 can be obviously improved more than pure ε-CL-20 crystal. It is not by changing the molecular structures of ε-CL-20 for each binder to affect the sensitivity. The safety and energetic properties of these PBXs are mainly influenced by the thermal capability (C°p) and density (ρ) of binders, respectively. | XU XiaoJuan1,2, XIAO JiJun1, HUANG Hui3, LI JinShan3 & XIAO HeMing1 1 Department of Chemistry, Nanjing University of Science and Technology, Nanjing 210094, China 2 Department of Chemistry, Yancheng Teacher’s College, Yancheng 224002, China 3 Institute of Chemical Materials, China Academy of Engineering Physics, Mianyang 621900, China | 2007 | Science China Chemistry2007，50，6： | 15 |
| 7 | Symmetric-key cryptosystem with DNA technology显示文摘DNA cryptography is a new field which has emerged with progress in the research of DNA computing. In our study, a symmetric-key cryptosystem was designed by applying a modern DNA biotechnology, microarray, into cryptographic technologies. This is referred to as DNA symmetric-key cryptosystem (DNASC). In DNASC, both encryption and decryption keys are formed by DNA probes, while its ciphertext is embedded in a specially designed DNA chip (microarray). The security of this system is mainly rooted in difficult biology processes and problems, rather than conventional computing technology, thus it is unaffected by changes from the attack of the coming quantum computer. The encryption process is a fabrication of a specially designed DNA chip and the decryption process is the DNA hybridization. In DNASC, billions of DNA probes are hybridized and identified at the same time, thus the decryption process is conducted in a massive, parallel way. The great potential in vast parallelism computation and the extraordinary information density of DNA are displayed in DNASC to some degree. | LU MingXin1,2*, LAI XueJia3*, XIAO GuoZhen4,2 & QIN Lei5 1 Department of Information Management, Nanjing University, Nanjing 210093, China 2 State Key Lab of Information Security, Institute of Software of Chinese Academy of Science, Beijing 100049, China 3 Department of Computer Science & Engineer, Shanghai Jiao Tong University, Shanghai 200030, China 4 State Key Lab of ISN, Xidian University, Xi’an 710071, China 5 Cancer Research Institute, Queen’s University, Kingston, Ontario, K7L3N6, Canada | 2007 | Science in China(Series F)2007，50，3： | 14 |
| 8 | Crank conditions and rotatability of 3-RRR planar parallel mechanisms显示文摘This paper investigates the rotatability of planar parallel mechanisms by revealing the crank conditions that relate to link parameters.The paper extends the theorem of assemblability and the rotatability criterion and applies these criteria to parallel mechanisms in investigating the crank conditions of a parallel mechanism,leading to classification of three types of crank existing conditions including three-crank’s,six-crank’s and nine-crank’s of 3-RRR planar parallel mechanisms.The results are summarized as constraint conditions in relation with link parameters with a concluding table and case studies. | LI RuiQin 1 &DAI Jian S 2 1 College of Mechanical Engineering and Automation,North University of China,Taiyuan 030051,China 2 Department of Mechanical Engineering,King’s College London,University of London,WC2R 2LS,UK | 2009 | Science China(Technological Sciences)2009，52，12： | 12 |
| 9 | Ecological Economic Problems and Development Patterns of the Arid Inland River Basin in Northwest China显示文摘中国西北部干旱区的内陆河流域位于欧亚大陆的中心(35°N,106°E),占全国陆地总面积的24.5%,是世界上最干旱的地区之一。该区具有较为湿润的山地和干旱的平原地带性交替特征。发源于山区的几条河流,如黑河、石羊河.疏勒河和塔里木河,在流经中游地区,孕育了一些生机盎然的绿洲后,注入一些小的湖泊或者消失在广袤的干旱荒漠盆地。山地.绿洲和沙漠相间分布的景观特征是中国西北干旱区内陆河流域典型的景观格局。尽管该区相对于其他的干旱地区来说有较多的农牧业生产活动,水资源问题仍然是限制该区经济发展的重要影响因素。我们以黑河流域作为一个案例, | Lihua Zhou Key Laboratory of Desert and Desertification,Cold and Arid Regions Environmental and Engineering Research Institute,Chinese Academy of Sciences,320 Dong Gang West Road,Lanzhou 730000,People’s Republic of China lhzhou@lzb.ac.cnGuojing Yang Laboratory of Watershed Hydrology and Ecology,Cold and Arid Regions Environmental and Engineering Research Institute,Chinese Academy of Sciences,320 Dong Gang West Road,Lanzhou 730000,People’s Republic of China ygj7518@163.com | 2006 | AMBIO-人类环境杂志2006，35，6： | 11 |
| 10 | Total control-based unified allocation model for allowable basin water withdrawal and sewage discharge显示文摘In this paper,a new model with a total amount control target of allowable water withdrawal based on initial water right is built for the implementation of initial water right allocation scheme as well as unified allocation for allowable water withdrawal and sewage discharge.The model couples the water allocation simulation model and the computational model of permissible pol-lution bearing capacity.In view of the model complexity,a new technology which synthesizes system simulation,iterative reservoir turns and intelligent computation is proposed to improve the operability of allocation scheme and computational efficiency.Taking the Beijiang River Basin in the Pearl River Basin as an example,the study explains the model establishment,solution and application,and draws an optimized operation graph of large-scale reservoirs.The study also obtains a long-term operation strategy of river basin water resources system,the allocation schemes of allowable water withdrawal and sewage discharge in a typical year and the flow hydrographs of trans-boundary sections.The validity of the model and the allocation rationality are analyzed as well. | HU SiYi1,2,WANG ZongZhi1,WANG YinTang1 & ZHANG LingLing3 1 State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering,Nanjing Hydraulic Research Institute,Nanjing 210029,China 2 Ministry of Water Resources,the People’s Republic of China,Beijing 100053,China 3 School of Public Administration,HoHai University,Nanjing 210098,China | 2010 | Science China(Technological Sciences)2010，53，5： | 10 |
| 11 | 海洋工程技术强国战略显示文摘为了推进海洋强国建设,中国工程院于2011年启动了'中国海洋工程与科技发展战略研究'重大咨询项目研究。本文从海洋探测、海洋运载、海洋能源、海洋生物资源、海洋环境和海陆关联6个重要工程技术领域开展咨询调查研究,系统分析了海洋工程与科技发展的机遇与战略需求,提出了发展战略和任务。明确提出建设海洋强国,科技必须先行,必须首先建设海洋工程技术强国,建议国家加大海洋工程技术的发展力度,加快实施海洋工程科技创新驱动和现代海洋产业发展推进两大计划。 | Task Force for the Study on Development Strategy of China’s Marine Engineering and Technology Comprehensive Research Group | 2016 | 中国工程科学2016，18，2： | 9 |
| 12 | Magnetic characteristics of dustfall in urban area of north China and its environmental significance显示文摘Urban particulate pollutants not only affect urban air quality but also directly threaten public health. Lanzhou has been one of the most seriously polluted cities in the world due to its special geophysical location and weather conditions, which makes it an ideal place for urban particulate pollution study. In this study a set of environmental magnetic parameters (χlf, χfd%, χARM, SIRM, HIRM, SOFT and back field IRM) were measured and analyzed for the dustfall samples collected monthly during 1997.4―2000.5 and 2004.11―2005.10 at Lanzhou University campus (KLD and CCS) and at a clear site of Gaolanxian (GLX). Results demonstrate that the main magnetic minerals in the dustfall are magnetite, with some maghaemite and haematite. Cross plots of Mrs/Ms vs. Bcr/Bc and χfd% vs. χARM/SIRM indicate that the main magnetic grain sizes are pseudo-single-domain (PSD). The high concentration of magnetic min-erals in the dustfall indicates that Lanzhou is seriously polluted. The main pollution sources are an-thropogenic activities and nature dust, with the former posing a great threat during the whole year, which is different from the general view that the natural dust is the main contributor in summer. With great efforts of the government and local authority in the past decades, the air quality in Lanzhou has been improved in winter, but it is not so obvious in summer. This study also reveals that as a simple, rapid and accurate technology, environmental magnetism could be a valuable tool for urban pollution study. | XIA DunSheng1,2, YANG LiPing2, MA JianYing1, YU Ye1, WANG Guan2 & CHEN FaHu2 1 Key Laboratory of Desert and Desertification, Institute of Cold and Arid Regions Environmental and Engineering, Chinese Academy of Sciences, Lanzhou 730000, China 2 CAEP, Key Laboratory of West China’s Environmental System (Ministry of Education), Lanzhou University, Lanzhou 730000, China | 2007 | Science China Earth Sciences2007，50，11： | 8 |
| 13 | Tensile properties and fracture behavior of Ti_2AlNb based alloys at room temperature显示文摘The tensile mechanical properties and fracture behaviors of Ti 22Al 20Nb 7Ta alloys were studied at room temperature. Three typical microstructures of Ti 2AlNb based alloys were obtained by combination of thermal mechanical processing and heat treat ment. They are: 1) lath mixture of O + B 2 with remaining β grain boundaries and α 2 phase; 2) equiaxed O phase in B 2 matrix; 3) fine lath mixture of O + B 2 without remaining β grain boundaries. It is shown that the microstructure obviously affects the tensile properties of Ti 2AlNb based alloys. The microstructure of fine lath mixture of O + B 2 without remaining β grain boundaries has good combination of yield stress and ductility, while the microstructure with lath mixture of O + B 2 with remaining β grain boundaries and α 2 phase has low yield stress and elongation. The fracture mode was also controlled by the microstructure of Ti 2AlNb based alloys. By means of SEM, it was found that the dominated fracture mode of microstructure with lath mixture of O + B 2 with remained β grain boundary and α 2 phase was intergranular, and the fracture mode of the other two microstructures was mainly transgranular. | PENG Ji hua(彭继华) 1, 2 , MAO Yong(毛 勇) 2, LI Shi qiong(李世琼) 2, SUN Xun fang(孙训方) 2 1. Department of Engineering Mechanics, Southwest Jiaotong University, Chengdu 610031, P.R.China 2. Division of Super Alloys, Central Iron and S | 2000 | 中国有色金属学会会刊:英文版2000，10，3： | 6 |
| 14 | Safety Assesment Model for Fully-Mechanized Coalface | WANG Lian\|guo 1,\ SUN Qiu\|zhi 2,\ WANG Yu\|zhen 3 1. Systems Engineering Institute, Shandong Univercity of Science and Technology Tai′an, 271000 2. Computing Centre, Shandong College of Hydraulic Engineering Tai′an, 271000 3. Institute of S | 2000 | Systems Science and Systems Engineering2000，10，3： | 6 |
| 15 | Novel Manufacturing Technology of Hyperbolic Plates for Shipbuilding显示文摘On the basis of the principle of dieless hydrobulging technology, a novel hydrobulging technology for manufacturinghyperbolic plates is proposed. First, a toroidal pipe elbow or a partial toroidal pipe elbow is formed, then the single hydrobulgedstructure can be cut up into some desired plates. It is proved by experiments and finite element simulation that manufacturingtechnology of hyperbolic plates adopting integrated hydrobulging forming technology is feasible. | ZHANG Xu , ZHANG Jia-tai , LIU Gang, YUAN S J, WANG Z R College of Mechanical and Electrical Engineering, Harbin Engineering University, Harbin, 150001, China College of Material Science and Engineering, Harbin Institute of Technology, Harbin , 150001 , China | 2002 | Journal of Marine Science and Application2002，1，1： | 6 |
| 16 | 世界海洋工程与科技的发展趋势与启示显示文摘本文通过对世界海洋工程与科技发展所呈现的海洋开发技术和设备不断进步推动海洋资源全面开发利用,海洋能源开发利用已成为各海洋国家发展的重要支柱,海洋生物资源开发一直是世界各国竞争热点,海洋污染控制和防范受到国际社会的高度关注,海陆关联工程与技术在现代海洋开发中发挥越来越重要的作用等特点与趋势的梳理与分析,获得如下启示:强化全民海洋意识,推进海洋强国战略;加强科技创新,提升海洋工程与科技的竞争力;优化产业结构,大力扶持海洋新兴产业;健全管理体制,建立协调发展机制;加强海洋保护,保障资源可持续利用。 | Task Force for the Study on Development Strategy of China’s Marine Engineering and Technology Comprehensive Research Group | 2016 | 中国工程科学2016，18，2： | 6 |
| 17 | Microstructure and oxygen storage capacity of Sr-modified Pt/CeO_2-ZrO_2 catalysts | Rui Ran a,Jun Fan b,Duan Weng a,a State Key Lab of New Ceramic and Fine Processing,Department of Materials Science and Engineering,Tsinghua University,Beijing 100084,China b The Administrative Centre for China’s Agenda 21,Beijing 100038,China | 2012 | Progress in Natural Science:Materials International2012，22，1： | 5 |
| 18 | A new navigation approach of terrain contour matching based on 3-D terrain reconstruction from onboard image sequence显示文摘This article presents a passive navigation method of terrain contour matching by reconstructing the 3-D terrain from the image sequence(acquired by the onboard camera).To achieve automation and simultaneity of the image sequence processing for navigation,a correspondence registration method based on control points tracking is proposed which tracks the sparse control points through the whole image sequence and uses them as correspondence in the relation geometry solution.Besides,a key frame selection method based on the images overlapping ratio and intersecting angles is explored,thereafter the requirement for the camera system configuration is provided.The proposed method also includes an optimal local homography estimating algorithm according to the control points,which helps correctly predict points to be matched and their speed corresponding.Consequently,the real-time 3-D terrain of the trajectory thus reconstructed is matched with the referenced terrain map,and the result of which provides navigating information.The digital simulation experiment and the real image based experiment have verified the proposed method. | LI LiChun1,2,YU QiFeng2,SHANG Yang2,YUAN Yun2,LU HongWei3 & LIU XiaoLin4 1 Beijing Aerospace Control Center,Beijing 100094,China 2 College of Aerospace and Material Engineering,National University of Defense Technology,Changsha 410073,China 3 Equipment Research Institute of PLA’s Second Artillery,Beijing 100085,China 4 College of Mechatronic Engineering and Automation,National University of Defense Technology,Changsha 410073,China | 2010 | Science China(Technological Sciences)2010，53，5： | 5 |
| 19 | Vacancies and Antisites in B2 FeAl and DO_3 Fe_3Al with a Modified Analytic EAM Model显示文摘A simple modified analytic EAM model for bcc Fe and fcc Al was used to calculate the lattice constant and elastic constants of B2 FeAl and DO3 Fe3Al alloys. The formation energies of vacancy and antisite were also calculated. The present calculations are in agreement with the experimental data and the theoretical results obtained by other authors. | Xiaolin SHU, Wan gyu HU, Hanning XIAO and Huiqiu DENG College of Materials Science and Engineering, Hunan University, Changsha 410082, China Ban gwei ZHANG International Centre of Materials Physics, Chinese Academy of Sciences, S | 2001 | Journal of Materials Science & Technology2001，17，6： | 4 |
| 20 | The Protection Policy of Eco-environment in Desertification Areas of Northern China:Contradictions and Countermeasures显示文摘中国北方沙漠化土地以其广泛的分布和迅速发展构成了区域环境和社会经济发展的丰题。截止2000年,中国北方沙漠化土地面积达3.857×10^5km^2,并且正以每年3595km^2的速度住扩展。为了遏制不断恶化的生态环境,中国政府曾诉诸丁生物技术措施和工程措施,但收效甚微。20世纪90年代末,中央政府在陕北看到了退耕还林(草)和封山绿化对保护生态环境的作用,于是节约用水、退耕还林(草)、禁牧以及移民搬迁等生态保护政策便成为中国沙漠化地区生态环境治理的主要内容。但由于生态保护政策与保护生态环境的现实产生了一系列的矛盾,并没有改变牛态环境局部治理、整体恶化的态势。 | Ma Yonghuan Cold and Arid Regions Environmental and Engineering Research Institute,Chinese Academy of Sciences,260 Dong Gang West Road,Lanzhou 730000,People’s Republic of China.mayonghuan2OOO@sina.com.cnFan Shengyue Cold and Arid Regions Environmental and Engineering Research Institute,Chinese Academy of Sciences,260 Dong Gang West Road,Lanzhou 730000,People’s Republic of China.syfan@ns.lzb.ac.cn | 2006 | AMBIO-人类环境杂志2006，35，3： | 4 |
您所在的机构暂未开通此部分的功能，请联系管理员