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Science china(Technological Sciences) 2011年第4期54卷 793-798页

作者： BAO TengFei1,2,3,XU BaoSong1,2,3 & ZHENG XueQing1,2,3 1State Key Laboratory of Hydrology-Water Resources and hydraulic Engineering,Hohai University,nanjing 210098,china 2National Engineering research Center of Water Resources Efficient Utilization and Engineering Safety,nanjing 210098,china 3College of Water Conservancy and Hydropower Engineering,Hohai University,nanjing 210098,china State Key Laboratory of Hydrology-Water Resources and hydraulic Engineering Hohai University National Engineering research Center of Water Resources Efficient Utilization and Engineering Safety College of Water Conservancy and Hydropower Engineering H

A hybrid method of limit equilibrium and finite element internal force for analysis of arch dam stability against sliding is *** finite element internal force method(FEIFM) is used to provide more accurate thrust forces acting on the faces of a slip body,and the limit equilibrium method(LEM) is employed to evaluate the factor of safety of the slip *** method presented can deal with a slip body with large amount of geometrically complex slip *** addition,compared with the traditional LEM,it can meet the balance condition of the forces in the slip *** example shows that the factor of safety obtained by the method presented agrees well with the theoretical solution.A practical example is also presented to demonstrate the application of the method in the stability analysis of an arch dam *** results from the examples show that the method is promising in analysis of arch dam stability against sliding.

关键词： arch dam stability against sliding limit equilibrium method finite element internal force method

Dam risk assistant analysis system design

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Science china(Technological Sciences) 2008年第S2期51卷 101-109页

作者： HE XianFeng1,2,3,GU ChongShi3,4,WU ZhongRu3,4 & SU HuaiZhi3,4 1 Yellow River institute of hydraulic research,Zhengzhou 450003,china 2 Embankment Security Defect Prevention and Control Engineering research Center of MWR,Zhengzhou 45000,china 3 College of Water Resources and Hydropower Engineering,Hohai University,nanjing 210098,china 4 National Engineering research Center of Water Resources Efficient Utilization and Engineering Safety,Hohai University,nanjing 210098,china Yellow River institute of hydraulic research Zhengzhou China Embankment Security Defect Prevention and Control Engineering research Center of MWR Zhengzhou China College of Water Resources and Hydropower Engineering Hohai University Nanjing China National Engineering research Center of Water Resources Efficient Utilization and Engineering Safety Hohai University Nanjing China

In order to reduce the labor intensity and task difficulty of dam risk analysis and to meet the actual requirement of dam risk analysis,it is necessary to establish a dam risk assistant analysis *** program structure and the implementation ways of the dam risk assistant analysis system are analyzed,and a procedural framework with "three-tier and multi-database" structure and "level structure" is *** concept of dam risk assessment system modular development is proposed and the coupled mode of function module and data is ***,the dam risk assistant analysis system is developed using Delphi visual programming language.

关键词： dam risk risk analysis assistant analysis system

On the formation of couplet-style stratifications

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International Journal of Sediment research 2008年第1期23卷 85-91页

作者： Yu-Hai WANG1, Yan-Hong WANG2, and Li-Qun TANG31 Ph.D., Engineer, Department of Sediment research, china institute of Water Resources and Hydropower research, Chegongzhuangxilu 20, Beijing 100044, china, 2 Ph.D., Engineer, nanjing hydraulic research institute, Hujuguanlu 34, nanjing 210024, china 3 Ph.D., Prof., Department of Sediment research, china institute of Water Resources and Hydropower research, Chegongzhuangxilu 20, Beijing 100044, china Ph.D. Engineer Department of Sediment Research China Institute of Water Resources and Hydropower Research Chegongzhuangxilu 20 Beijing 100044 China Ph.D. Engineer Nanjing Hydraulic Research Institute Hujuguanlu 34 Nanjing 210024 China Ph.D. Prof. Department of Sediment Research China Institute of Water Resources and Hydropower Research Chegongzhuangxilu 20 Beijing 100044 China

Couplet-style stratifications refer to the sedimentary sequences that consist of alternating coarse-grain-dominated bed and fine-grain-dominated bed, with or without a sandwiched middle-sized bed. The formation mechanism is complicated due to the interplays of varying driving force (s), sediment supply & transport and topographic configurations. This paper presents a comprehensive overview of such characteristic bedforms, which emerge during the transport and deposition of non-uniform sediments. The leading formative models include water-stage variation, gravel-overpassing process, superimposition of bedload sheets and avalanching process (inverse grading). Each process might produce similar or distinct sedimentological features with respect to grading, matrix content, grain attitude, bounding faces between beds and internal longitudinal/transverse geometry. The couplet-style stratified strata might play an active role in landscape evolution.

关键词： Couplet-style stratification Formative model Sedimentological features Landform

Spatial distribution of 10m firn temperature in the Antarctic Ice Sheet

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Science china Earth Sciences 2011年第5期54卷 655-666页

作者： WANG YeTang1,3 & HOU ShuGui2,3 1 Shandong Marine Fisheries research institute,Yantai 264006,china 2 MOE,Key Laboratory for Coast and Island Development,School of Geographic and Oceanographic Sciences,nanjing University,nanjing 210093,china 3State Key Laboratory of Cryospheric Science,Cold and Arid Regions Environmental and Engineering research institute,Chinese Academy of Sciences,Lanzhou 730000,china Shandong Marine Fisheries research institute Yantai China State Key Laboratory of Cryospheric Science Cold and Arid Regions Environmental and Engineering Research Institute Chinese Academy of Sciences Lanzhou China MOE Key Laboratory for Coast and Island Development School of Geographic and Oceanographic Sciences Nanjing University Nanjing China

A database of Antarctic 10 m firn temperature was constructed using available borehole temperature measurements with data quality control to extend knowledge of Antarctic climate. Slopes from a high-resolution digital elevation model and the main ice divide were used to delineate main drainage sectors across Antarctica. In each drainage sector, a quantitative relationship between temperature and latitude, longitude and altitude was established using available tim temperature data. Quantitative relationships incorporating other factors affecting Antarctic air temperature such as atmospheric circulation and small-scale to- pography were used to derive a 10-km resolution grid map of surface temperature. The resulting temperature patterns presented a reasonable depiction of both large and small-scale variations in Antarctic 10 m firn temperature. This map is useful for many spatial variation studies, Antarctic ice sheet models, and comparison with satellite-derived temperature data and outputs of atmospheric general circulation models.

关键词： Antarctica 10 m firn temperature spatial distribution

CRITICAL CONDITION FOR THE INITIATION OF SUSPENSION

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International Journal of Sediment research 1993年第3期 51-69页

作者： CHENG Niansheng and ZHU Lijun Senior engineer, nanjing hydraulic research institute, china Engineer, nanjing hydraulic research institute, china

Channel bed deformation and sediment transport result from the exchanges among various forms of sediment movement. It is significant to take into account the interactions of suspended load, bed load and movable bed to explore the mechanism of bed changes and develop better modelling methods. Considering the influences of the near-bed turbulence on the critical condition of suspending processes of sediment particles, theoretical criterion is presented according to the concept of probability of suspension. In addition, several existing formulae are thus analysed and compared with each other.

关键词： Suspension bed load suspended load near-bed turbulence bed material Viscous sublayer burst phenomena probability.

Game model of safety monitoring for arch dam deformation

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Science china(Technological Sciences) 2008年第S2期51卷 76-81页

作者： SU HuaiZhi1,2,WU ZhongRu1,2,GU YanChang1,2,HU Jiang1 & WEN ZhiPing3 1 College of Water Conservancy and Hydropower Engineering,Hohai University,nanjing 210098,china 2 National Engineering research Center of Water Resources Efficient Utilization and Engineering Safety,nanjing 210098,china 3 Department of Computer Engineering,nanjing institute of Technology,nanjing 210013,china College of Water Conservancy and Hydropower Engineering Hohai University Nanjing China National Engineering research Center of Water Resources Efficient Utilization and Engineering Safety Nanjing China Department of Computer Engineering Nanjing Institute of Technology Nanjing China

Arch dam deformation is comprehensively affected by water pressure,temperature,dam's structural behavior and material properties as well as other *** them the water pressure and temperature are external factors(source factors) that cause dam deformation,and dam's structural behavior and material properties are the internal factors of deformation(resistance factors).The dam deformation is the result of the mutual game playing between source factors and resistance ***,resistance factors of structure and materials that reflect resistance character of arch dam structure are introduced into the traditional model,where structure factor is embodied by the flexibility coefficient of dam body and the maximum dam height,and material property is embodied by the elastic modulus of *** the basis of analyzing the correlation between dam deformation and resistance factors,the game model of safety monitoring for arch dam deformation is put forward.

关键词： arch dam deformation monitoring model flexibility coefficient game theory

research on terahertz time-domain spectroscopy methodology of liquid samples

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Science china(Technological Sciences) 2010年第4期53卷 1012-1015页

作者： ZHOU Lei,XU WeiWei,JIN BiaoBing,CHEN Jian,KANG Lin & WU PeiHeng research institute of Superconductor Electronics(RISE),nanjing University,nanjing 210093,china research institute of Superconductor Electronics (RISE) Nanjing University

Terahertz(THz) time-domain spectroscopy(TDS) has been applied to investigate liquid's optical property in recent ***,comprehensive discussion of how to compute liquids' complex refractive indices and absorption rates ... 详细信息

关键词： terahertz(THz) time-domain spectroscopy(TDS) liquid

Properties of Leakage Corrosion of Concrete and Its Durability

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Journal of Wuhan University of Technology(Materials Science) 2008年第6期23卷 946-949页

作者：戈雪良 Department of Materials and Structural Engineering Nanjing Hydraulic Research Institute

The properties and mechanism of concrete under water leakage corrosion were studied in terms of the dissolution of calcium oxide and silicon oxide from concrete and the variation of pH value of permeate *** experimental results show that the amount of calcium oxide and silicon oxide dissolved from per cubic meter of concrete gradually decrease with penetration time and ultimately stabilize at a certain *** pH value of permeate water descend along with penetration *** durability of concrete under leakage corrosion was analyzed by a formula fitted on the dissolved amount of calcium oxide.

关键词： concrete leakage corrosion properties durability

A　40　km　Fiber－optic　Microwave　Subcarrier　Multiplexing　Transmission　System　for　Multi－channel　FM－TV

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Chinese Journal of Lasers 1996年第5期B5卷 470-474页

作者： ZHANG Zhengxian LIN Zhiyuan LI Zhitang Xu Jie (Communications Engineering institute, nanjing 210016, china Southeast Universtiy, nanjing 210018, china Wuhan research institute of Post and Telecommunications, Wuhan 430074, china) china Southeast Univ Nanjing China

Ａ４０ｋｍＦｉｂｅｒ－ｏｐｔｉｃＭｉｃｒｏｗａｖｅＳｕｂｃａｒｒｉｅｒＭｕｌｔｉｐｌｅｘｉｎｇＴｒａｎｓｍｉｓｓｉｏｎＳｙｓｔｅｍｆｏｒＭｕｌｔｉ－ｃｈａｎｎｅｌＦＭ－ＴＶＺＨＡＮＧＺｈｅｎｇｘｉａｎ；ＬＩＮＺｈｉｙ... 详细信息

Ａ４０ｋｍＦｉｂｅｒ－ｏｐｔｉｃＭｉｃｒｏｗａｖｅＳｕｂｃａｒｒｉｅｒＭｕｌｔｉｐｌｅｘｉｎｇＴｒａｎｓｍｉｓｓｉｏｎＳｙｓｔｅｍｆｏｒＭｕｌｔｉ－ｃｈａｎｎｅｌＦＭ－ＴＶＺＨＡＮＧＺｈｅｎｇｘｉａｎ；ＬＩＮＺｈｉｙｕａｎ；ＬＩＺｈｉｔａｎｇ；ＸｕＪ...

关键词： fiber communication microwave subcarrier multiplexing multi-channel FMTV

New progress of lake sediments and environmental changes research in china

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Chinese Science Bulletin 1999年第19期44卷 1744-1754页

作者： WANG Sumin and ZHANG ZhenkeLaboratory of Lake Sediment and Environment, nanjing institute of Geography and Limnology, Chinese Academy of Sciences , nanjing 210008, china Department of Geography and Oceanology, nanjing University , nanjing 210093 , china Laboratory of Lake Sediment and Environment Nanjing Institute of Geography and Limnology Chinese Academy of Sciences Nanjing China Department of Geography and Oceanology Nanjing University Nanjing China

Environmental change recorded by lake sediments is one of the important branches of the past global changes study. The new progress of lake sediments and environmental changes in china since the late 1980s has been comprehensively discussed. The highlights emphasized are Asian paleomonsoon migration reflected by lake level fluctuation, uplift of the Qinghai-Xizang Plateau recorded by lacustrine sediments, saltlake sediments and

关键词： lake sediments environmental change.