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Influence of the impounding process of the three gorges Reservoir up to water level 172.5m on water eutrophication in the Xiangxi Bay

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Science China(Technological Sciences) 2010年第4期53卷 1114-1125页

作者： YANG ZhengJian1,LIU DeFu1,JI DaoBin1,2 & XIAO ShangBin1,3.1 College of Civil & Hydroelectric Engineering,China three gorges University,yichang {3.China 2 School of Water Resources & Hydropower Engineering,Wuhan University,Wuhan 43.072,China 3.Institute of Earth Environment,Chinese Academy of Sciences,Xi’an 710075,China College of Civil & Hydroelectric Engineering China Three Gorges University Yichang China School of Water Resources & Hydropower Engineering Wuhan University Wuhan China Institute of Earth Environment Chinese Academy of Sciences Xi’an China

The water level of the three gorges Reservoir(TGR) rose to 172.5 m in two stages from September to November,*** hydrodynamic parameters and water quality parameters(*** velocity,temperature,turbidity and nutrient content) had been continuously monitored to reveal the influence of the impounding process of the TGR on the water eutrophication in the Xiangxi Bay(XXB).The maximal daily rise of the water level of the TGR was about 2.3. *** water exchange between the mainstream(the Changjiang River) and the XXB of the TGR was enhanced by density current,and its main characteristics were a density-stratified flow in different *** water exchange reduced the differences of the water quality parameters(for example,temperature,turbidity,nutrient level,pH,etc.) between the mainstream and the XXB during the impounding ***,the water stability index in the mainstream remained small but it was lowered in the *** main causes included the dilution by water of lower concentration of the chlorophyll a(Chl.a) entering from the mainstream,the decline of the water stability,and the increase of suspended silt,which induced the Chl.a to decrease in the XXB during the impounding *** grade of the water eutrophication changed from middle eutrophic level to mesotrophic state in the ***,as available nutrients were imported into the XXB from the mainstream during the impounding process the risk of water eutrophication increases in the XXB in the future.

关键词： impounding density current eutrophication the Xiangxi Bay the three gorges Reservoir

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Fault diagnosis based on high-gain observer with an update law for a class of nonlinear systems

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控制理论与应用（英文版） 2010年第4期8卷 447-452页

作者： Yanjun SHEN (College of Science,China three gorges University,yichang Hubei {3.China) College of Science China Three Gorges University Yichang Hubei China

In this paper,by using the well-known high-gain observer design,an update law for the gain and an adaptive estimation of parameters,a new method of fault diagnosis for a class of nonlinear systems is *** resort to any transformation for the parameters,the estimation errors of the states and the parameters are guaranteed to be globally exponentially convergent by a persistent excitation *** to the existing results,it can be applied to nonlinear systems with nonlinear terms admitting an incremental rate depending on the measured output.A case study further verifies the validity of the proposed research.

关键词： Fault diagnosis Adaptive estimation High-gain observer Nonlinear systems

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A new type of Shipboard Meteorological Satellite Receiving-processing System

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Acta Oceanologica Sinica 2000年第1期19卷 35-46页

作者： Xie Simei Hao Chunjiang Zou Bin Jing Qiyi Liao Xiaohong Sheng Xiaowen Zhang Canrong (1. National Research Center for Marine Environment Forecasts, Beijing 100081, China 2, Second Institute of China Aerospace corporation 3. Beijing Chuanyi Electric Compan Natl. Res. Ctr. Mar. Environ. F. Beijing 100081 China Second Inst. of China Aerosp. Corp. China Beijing Chuanyi Electric Company Chinese Academy of Sciences Beijing China

The Shipboard Meteorological Satellite Receiving-processing System (SMSRPS) is specially developed for the navigation meteorological safeguard of the Antarctic exploration ship over the sea ice area of the forth Ocean. This system can suit to the climate environment of very high temperature high moisture and very low temperature - supersaturation; it has a self-protection ability to against the hurricane - force wind over force 12 and the strong vibration during icebreaking, as well as strong magnetic disturbance. It has two sets of receiving-imagery processing systems for polar orbit low-resolution and quasi-stationary high-solution satellites. The key creation Points of this system are as follows: 1. the active gyro-control stabilization platform and a mixed mounting system of three rotating a - B and x -- y axes are used. It solved the tracing difficulties both in the low elevation angle and very high elevation angle of polar-orbit satellite, even in the status of ship moving with continuously changing its poition, direction and ship roll and pitch. 2. Imagery processing subsystem. The newest BORLAND-- DELPHI language and PASCAL language pro gramming software are used under WINDOWS 95 environment. It has a dynamic positioning nested-grid system and electric mapping grid data system. It can show the latitude-longitude of any point on the map, and marks any object such as ship, station or island, and draws the route. It can monitor cloud and temperature, forest fire, anomalous change of ocean and land. It can output satellite cloud maps of 24 bit with very high clarity. This system is very advanced in technique for the whole structure with the features of small volume, light weight and very low cost. It suits to very bad climate and ocean environment. Its imagery process ing system has complete functions with high resolution and being very easy to operate. It is not only suit to land use, but also and specially to all kinds of ship over the sea. It can be exte

关键词： Shipboard Meteorological Satellite Receiving-processing System imagery processing system active gyro-control platform

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Microstructures and fatigue-free properties of the La^(3.) and Nd^(3.) doped Bi_4Ti_3._(12) thin films prepared by modified sol-gel technique

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Science China(Technological Sciences) 2008年第11期51卷 1843-1849页

作者： LI MeiYa1,2, PEI Ling1, LIU Jun1, YU BenFang1, GUO DongYun1, SUN XiaoHua3.& ZHAO XingZhong1,2 1 Department of Electronic Science and Technology, School of Physical Science and Technology, Wuhan University, Wuhan 43.072, China 2 Key Laboratory of Acoustic and Photonic Material and Device of the Ministry of Education, Wuhan Uni- versity, Wuhan 43.072, China 3.School of Mechanical and Material Engineering, China three gorges University, yichang {3. China Department of Electronic Science and Technology School of Physical Science and Technology Wuhan University Wuhan China Key Laboratory of Acoustic and Photonic Material and Device of the Ministry of Education Wuhan University Wuhan China School of Mechanical and Material Engineering China Three Gorges University Yichang China

Ferroelectric Bi3.25La0.75Ti3.12 (BLT) and Bi3.15Nd0.85Ti3.12 (BNT) thin films were fab- ricated on Pt/TiO2/SiO2/Si (100) substrates by a modified sol-gel technique. X-ray diffraction indicated that these films were of single phase with random polycrystal- line orientations. The surface morphologies of the films were observed by scanning electron microscope, showing uniform, dense films with grain size of 50―100 nm. Well-saturated hysteresis loops of the films were obtained in metal-ferroelectric- metal type capacitors with Cu top electrodes at an applied voltage of 400 kV/cm, giving the remanent polarization (2Pr) and coercive field (2Ec) values of the films of 25.1 μC/cm2 and 203.kV/cm for BLT, and 44.2 μC/cm2 and 296 kV/cm for BNT, re- spectively. Moreover, these capacitors did not show fatigue behaviors after up to 1.75×1010 switching cycles at the test frequency of 1 MHz, suggesting a fatigue-free character. The influences of the La3. and Nd3. doping on the properties of the films were comparatively discussed.

关键词： bismuth oxides ferroelectrics fatigue sol-gel technique

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First discovery of fossil Diplothrix (Muridae, Rodentia) outside the Ryukyu Islands, Japan

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Chinese Science Bulletin 2010年第4期55卷 411-417页

作者： WANG Yuan1,2, JIN ChangZhu1 & WEI GuangBiao3.41 Key Laboratory of Evolutionary Systematics of Vertebrates, Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, Beijing 100044, China 2 Graduate University of Chinese Academy of Sciences, Beijing 100049, China 3.Chongqing three gorges Institute of Paleoanthropology, China three gorges Museum, Chongqing 400015, China 4 Chongqing three gorges Culture and Social Development Research Institute, Chongqing Normal University, Chongqing 400047, China Key Laboratory of Evolutionary Systematics of Vertebrates Institute of Vertebrate Paleontology and Paleoanthropology Chinese Academy of Sciences Beijing China Graduate University of Chinese Academy of Sciences Beijing China Chongqing three gorges Institute of Paleoanthropology China Three Gorges Museum Chongqing China Chongqing three gorges Culture and Social Development Research Institute Chongqing Normal University Chongqing China

The first Diplothrix (Muridae, Rodentia) fossils of the early Early Pleistocene are described as D. yangziensis sp. nov., which were collected from the Renzidong Cave deposits in Anhui Province, Eastern China. Diplothrix was previously represented by a single species, D. legata, whose geographical distribution during the Late Pleistocene is restricted to the Ryukyu Islands, Japan. With straight chevrons on M1, distinct t3.and t9 on upper molars, primitive M3. mlc on m1, and developed a-lab on m2 and m3. the new species is morphologically distinct from other large murids in East Asia, and should belong to the genus Diplothrix. There are also differences in molar morphology between the new species and D. legata, the type species of Diplothrix, as well as other known fossils. For example, D. yangziensis sp. nov. has a smaller size, a more elongated crown, developed precingulum and pc on M1, more primitive M3. weaker mlc and more primitive pc on m1, and stronger plc and pc on m3. In short, Diplothrix yangziensis sp. nov. is evidently more primitive than D. legata, suggesting that the former is likely the ancestor of the latter. Diplothrix yangziensis sp. nov. is the first discovery of the genus outside the Ryukyu Islands, Japan and is also the earliest and most primitive species of the genus in Eurasia. Its discovery has significant implications for reconstructing the evolution and dispersal pattern of Diplothrix, as well as for discussing its palaeoecological variation.

关键词：琉球群岛化石日本鼠科形态差异供应量早更新世中国东部

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Monitoring the Cultivated Slope Land in the three gorges Reservoir Area Based on Remote Sensing and GIS

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Wuhan University Journal of Natural Sciences 2006年第4期11卷 915-921页

作者： ZHOU Jieming1, ZHOU Qigang 2, 3.,HUANG Zhiqin 2, 3. 4 1. The Faculty of Geography and Resources Science, Sichuan Normal University, Chengdu 610066, Sichuan, China 2. Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041, Sichuan, China 3. Graduate University of the Chinese Academy of Sciences, Beijing 100049, China 4. Information Center of Land and Resources Department of Sichuan Province, Chengdu 610041, Sichuan, China The Faculty of Geography and Resources Science Sichuan Normal University Chengdu Sichuan China Institute of Mountain Hazards and Environment Chinese Academy of Sciences Chengdu Sichuan China Graduate University of the Chinese Academy of Sciences Beijing China Information Center of Land and Resources Department of Sichuan Province Chengdu Sichuan China

By means of combining auto-extraction with manual interpretation, the current distribution information about cultivated land is obtained. The distribution information of 1992 is extracted from the dynamic polygons of 2002. The monitoring mini-system of the cultivated slope land is established. In the system, detailed surveys, focused on the resources of cultivated slope land, are carried out. The results indicate that the area of the cultivated slope land is very large. Meanwhile, there are lots of cultivated steep slopes with gradient above 3.°. The areas of steep land cultivated had been slowly reduced from 1992 to 2002. At the same time, the pressures of returning farm land to forestry are great in all counties. The conflicts between population growth, insufficient grain supply and stagnant economic development sharpen increasingly. It is inevitable to improve the agricultural structure.

关键词： slope land cultivated remote sensing geography information system (GIS) the pressure of returning farm land to forestry three gorges Reservoir Area

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THE APPLICATIONS AND STUDY OF NUMERICAL SIMULATION OF TURBULENCE FLOW WITH FREE SURFACE IN HYDRAULIC SPILL WAYS STRUCTURE

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Journal of Hydrodynamics 1997年第4期9卷 53-54页

作者： Dai Hui-chaoChina Yangtze three gorges Project Development corporation,{3. 443.02.P. R.China

The turbulence flow Free Surface has important applications in hydraulic spillways structure, such as the hydraulic jump, energy dissipation flow etc. This is being considered as very complicated flow, and has not yet been solved quite well by numerical method. In this paper, a Large-scale computational software package are developed for numerical laboratory of hydraulic spillway structure. Some methods,such as turbulence model, free surface and irregular boundary treating techniques,scientific computer visualization are put forward and performed.

关键词： turbulence model,free surface irregular boundary spillways structure

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CIRCULAR CHROMATIC NUMBER AND MYCIELSKI GRAPHS

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Acta Mathematica Scientia 2006年第2期26卷 314-320页

作者：刘红美 College of Science three gorges University Yichang 443002China

For a general graph G, M（G） denotes its Mycielski graph. This article gives a number of new sufficient conditions for G to have the circular chromatic number xc（M（G）） equals to the chromatic number x（M（G））, ... 详细信息

关键词： Circular chromatic number Mycielski graphs chromatic number

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Functional Characterization of a Putative Nitrate Transporter Gene Promoter from Rice

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Acta Biochimica et Biophysica Sinica 2006年第11期38卷 795-802页

作者： Ting-Zhang HU~(1,3. Kai-Ming CAO~1 Mian XIA~2 Xi-Ping WANG~(1,2*) 1 Department of Biochemistry,School of Life Science Fudan University,Shanghai 20043.,China 2 National Center for Molecular Crop Design,Weiming Kaituo Agriculture Biotech Co.,Ltd.,Beijing 100085,China 3.Department of Biology,Chongqing three gorges University,Chongqing 404000,China Department of Biochemistry School of Life Science Fudan UniversityShanghai 200433 China Department of Biology Chongqing Three Gorges UniversityChongqing 404000 China National Center for Molecular Crop Design Weiming Kaituo Agriculture Biotech Co. Ltd.Beijing 100085 China

Drought is one of the most significant abiotic stresses that influence plant growth *** analysis revealed that OsNRT1.3.a putative nitrate transporter gene in rice,wasinduced by *** confirm if the OsNRT1.3.promoter can respond to drought stress,a 2019 bpupstream sequence of OsNRT1.3.was *** OsNRT1.3.promoter fragments were generated by5′-deletion,and fused to the β-glucuronidase (GUS) *** chimeric genes were introduced into ***2019::GUS,NRT1196::GUS and NRT719::GUS showed similar expression patterns in seeds,roots,leaves and flowers in all transgenic rice,and GUS activity conferred by different OsNRT1.3.promoterfragments was significantly upregulated by drought stress,indicating that OsNRT1.3.promoter responds todrought stress and the 719 bp upstream sequence of OsNRT1.3.contains the drought response elements.

关键词： deletion analysis drought nitrate transporter OsNRT1.3.promoter

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Landslide Dam Forming Hazard Analysis Based on Geological and Induced Factors

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地学前缘 2009年第S1期16卷 70-71页

作者： Lixia Chen~(1,2),Kunlong Yin~(1,3.,Yang Wang~(1,3.,Changchun Liu~3.1.three gorges Research Center for Geo-Hazard,Ministry of Education,Wuhan 43.074,China. 2.Institute of Geophysics and Geomatics,China University of Geosciences(Wuhan),Wuhan 43.074,China 3.School of Engineering,China University of Geosciences(Wuhan),Wuhan 43.074,China

Landslide dams and lakes can cause great casualties and economic losses.A landslide dammed lake named Tangjiashan by Wenchuan earthquake in China was well known all over the world since May 12,2008. Many other landslide dams or lakes can also formed by rainfall or water fluctuation besides earthquake. Landslides along the river or branch banks in the three gorges Reservoir area face dam or lake forming possibility especially within the water

关键词： landslide dam forming probability the three gorges Reservoir area

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