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An infinity of conservation laws of fKdV equation

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Acta Oceanologica Sinica 1997年第1期16卷 19-28页

作者： Xu Zhaoting, Xu Yu and Tian Jiwei Institute of physical oceanography and physical oceanography Laboratory, Ocean university of qingdao, qingdao 2.6003, china Institute of physical oceanography Physical Oceanography Laboratory Ocean University of Qingdao Qingdao 266003 China

An infinity of conservation laws of fKdV equation is derived in terms of the Miura and Gardner's transform. The pseudo-mass and energy theorems are studied by the first two conservation laws. As a typical example, the theoretical mean wave resistance and the regional distribution of energy of the precursor soliton generation are determined by means of the first and the second conservation laws.

关键词： Precursor soliton of fKdV equation an fKdV equation an infinity of conservation laws

THE RELATIONSHIP BETWEEN THE TAIWAN WARM CURRENT AND TSUSHIMA WARM CURRENT

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Journal of Hydrodynamics 2009年第2期21卷 212-218页

作者： ZHENG Pei-nan WU De-xing LIN Xiao-pei physical oceanography Laboratory Ocean University of China Qingdao 266100 China Marine Environmental Ensuring of the Headquarters of General Staff Beijing 100081 China

The Taiwan Warm Current （TWC） and the Tsushima Warm Current （TSWC） flow northward over the shelf in the East china Sea （Ecs）, which some previous studies regard as a Taiwan-Tsushima Warm Current （TTWC） System. But the roles of the TWC and TSWC in the formation of the TTWC system have not been clarified. This article will show that the TSWC is more important in the TTWC system. Using a three-dimensional baroclinic model, we conducted several numerical experiments to reveal the dynamic relationship between the TWC and TSWC. The results show that the TWC has little effect on the TSWC, while the TSWC has a significant effect on the TWC. A source-sink driven mechanism along isobaths may be used to explain this phenomenon The perennial northward flow through the Tsushima Strait pumps the response over the northern shelf in the Ecs that gives rise to the TWC. Although the TSWC is located at the ＂downstream＂ region, it could induce about 0.5 Sv to TWC in annual mean values.

关键词： Taiwan-Tsushima warm current system POM source-sink driven circulation

An experimental study of the relations between bispectra and nonlinear apparent features of wind waves

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Acta Oceanologica Sinica 1993年第4期12卷 475-486页

作者： Ding Pingxing, Yu Zhouwen and Sun Fu Institute of Estuarine and Coastal Research East china Normal university, Shanghai 200062, china Laboratory of {3.ical oceanography, Ocean university of qingdao, qingdao 2.6003, china Institute of Estuarine and Coastal Research East China Normal University Shanghai 200062 China China

To investigate the nonlinear properties of wind waves, experiments are carried out in a wind-wave flume with slope bottom at different wind speeds and fetches. Both the internal structure and apparent features of the nonlin-earity of wind waves are studied by using bispectral and statistical analysis of surface elevations. The relations between bispectra and nonlinear apparent characteristics of wind waves are established and confirmed.

关键词： An experimental study of the relations between bispectra and nonlinear apparent features of wind waves

Israeli Water Achievements Today and Enlightenment to china

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Chinese Journal of Population,Resources and Environment 2008年第4期6卷 72-77页

作者： Sun Lei1,2, Xu Lanqing3.1. Institute of Environmental Science and Engineering, Ocean university of china, qingdao Shandong 266100, china 2. department of Soil and Water Sciences, Faculty of Agricultural, Food and Environmental Quality Sciences, the Hebrew university of Jerusalem, 76100, Israel 3. Logistics Group of Ocean university of china, qingdao Shandong 266100, china Institute of Environmental Science and Engineering Ocean University of China Qingdao Shandong 266100 China department of Soil and Water Sciences Faculty of Agricultural Food and Environmental Quality Sciences the Hebrew University of Jerusalem 76100 Israel Logistics Group of Ocean university of china Qingdao Shandong 266100 China

Despite the endemic drought, arid climate and associated limited freshwater resources, as well as difficult geopolitical realities, Israel can provide a reliable supply of high quality water to a rapidly growing population. The achievements of water supply in Israel can be summarized as water technologies (like water transportation and purification, desalination, wastewater treatment, effluent reuse, storm water catchment, control systems, rain enhancement and drip irrigation, etc.), water management and legislation as well as water industry. In view of the national concern regarding the quality and quantity of the water, the skills, technologies and know-how that Israel has accumulated in water supply and irrigation can give us enlightenment that is also presented in this paper.

关键词： Israel china water technology water management water industry

Warming in Arctic intermediate and deep waters around Chukchi Plateau and its adjacent regions in 1999

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Science china Earth Sciences 2005年第8期48卷 1312-1320页

作者： ZHAO Jinping1, GAO Guoping2 & JIAO Yutian1 1. First Institute of oceanography, State Oceanic Administration, qingdao 266061, china 2. Ocean {3. of china, qingdao 2.6003, china 1. First Institute of oceanography State Oceanic Administration 266061 Qingdao China 2. Ocean university of china 266003 Qingdao China

Based on the data measured during Arctic scientific expedition of china in 1999, the characteristics of temperature and salinity distributions around the Chukchi Plateau and its ad-jacent regions have been studied. It was found that the intermediate water with temperature higher than 0.5℃ existed in all parts of a 640 km section with a maximum temperature of 0.85℃ indicating a strong signal of the warming in Arctic Intermediate Water in 1999. Two important phenomena are described in this paper. First, the temperature of warm water was horizontally nonuniform. In the area of Chukchi Plateau, the temperature was higher, the layer of warm water was thicker and the depth of the warm water core was shallower than those in the area of con-tinental slope. The horizontal nonuniformity of the temperature distribution of warming water im-plies that the upward heat flux should also be nonuniform, thus exerting different effects on sea ice thickness, ice extent, and air-sea heat exchange. The mechanism to generate higher tem-perature in the plateau region was the bypassing of current around the plateau area caused by the special local topography, which restricted water exchange across the plateau and conserved heat in the water body. Second, the deep water down to 1400 m was also warming with a tem-perature increase of 0.2℃. The warming in deep water reflects the occurrence of complicated heat redistribution processes in the intermediate water, which altered the thermal structure in the upper 1400 m. The warming data embody the obvious impact of global climate change on the Arctic Ocean and further studies are wanted.

关键词： Chukchi Plateau, Arctic Ocean, warming in intermediate water, warming in deep water.

A NOTE ON THE BACKWARD ERRORS FOR INVERSE EIGENVALUE PROBLEMS

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Journal of Computational Mathematics 2003年第2期21卷 201-206页

作者： Xinguo Liu Zhengjian Bai (department of Mathematics, Ocean university of china, {3. 266071) Departmenl of Mathematics Ocean University of China Qingdao 266071

In this note, we consider the backward errors for more general inverse eigenvalue problems by extending Sun's approach. The optimal backward errors are defined for diagonal-ization matrix inverse eigenvalue problem with respect to an approximate solution, and the upper and lower bounds are derived for the optimal backward errors. The results may be useful for testing the stability of practical algorithms.

关键词： Inverse eigenvalue problem Optimal backward error Upper bound Lower bound

Cross thermocline mixing effect due to tide in the shallow sea

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Acta Oceanologica Sinica 1992年第1期11卷 1-11页

作者： Yang Dianrong, Zhou Dejian Zhang Yulin Institute of physical oceanography, Ocean university of {3., qingdao 2.6003, china

Using the data specially observed on the Bohai Sea oil platform by the authors for studying thermocline for two weeks, the thermocline depth, the temperature and the salinity of the layers below and above the thermocline were numerically modelled. The model is based on the Stigebrandt model and some important supplements are made in this paper in accordance with the local condition of the sea. The modelling results fit well in the observations. It is proved that the entrainmem due to both the tide and the wind can give rise to rather intense mixing cross the thermocline. This process makes the temperature rising below the thermocline,and causes the nutrient increasing above it,which has important significance for the marine physical environment and the marine organism.

关键词： shallow mixing salinity Bohai accordance intense nutrient numerically turbulent modelling

Chemical characteristics of clay minerals in the sediments from the Yellow River and the Changjiang River

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Chinese Science Bulletin 1997年第6期42卷 488-492页

作者： HE Liangbiao and LIU Qingyu1.First Institute of oceanography, State Oceanic Administration, qingdao 2.6003, china 2. Institute of {3.ical oceanography Ocean university of qingdao, Qingdac 2.6003, china First Institute of oceanography State Oceanic Administration Qingdao China Institute of physical oceanography Ocean University of Qingdao Qingdao China

THE characteristics of clay minerals are controlled by the characters of weathered mother rock and the weathering environments in source area. The characteristics of clay minerals of the Yellow River should be different from those of the Changjiang River because the characters of mother rock and the weathering environments in the drainage area of the Yellow River are quite different from those in the drainage area of the Changjiang River, so it is important to find a difference between the characteristics of clay minerals of the Yellow River and

关键词： the Yellow River the Changjiang River clay minerals chemical characteristics.

ABNORMAL BENDING OF MICRO-CANTILEVER PLATE INDUCECD BY A DROPLET

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Acta Mechanica Solida Sinica 2010年第5期23卷 428-436页

作者： Jianlin Liu Xueyan Zhu Xinkang Li Zhiwei Li 1(department of Engineering Mechanics,china university of Petroleum,{3. 266555,china) [a] department of Engineering Mechanics China University of Petroleum Qingdao 266555 China

The abnormal bending of a micro-cantilever plate induced by a droplet is of great interest and of significance in micro/nano-manipulations. In this study, the physical mechanism of this abnormal phenomenon induced by an actual droplet is elucidated. Firstly, the morphologies of 2D and 3. droplets axe solved analytically or numerically. Then the Laplace pressure difference acting on the cantilever plate caused by the droplet is presented. Finally, the deflections of the micro-cantilever plates driven by the capillary forces are quantitatively analyzed. These analytical results may be beneficial to some engineering applications, such as micro-sensors, MEMS and the micro/nano-measurement.

关键词： micro-cantilever plate surface tension Laplace pressure difference abnormal bending deflection