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REMOTE SENSING METHODS FOR SHIP WAKE deTECTION IN SAR IMAGE

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Journal of Hydrodynamics 2001年第3期13卷 122-126页

作者： Meng, Jun-Min tao, ming-de Zhang, Jie Ocean Univ. of Qingdao Qingdao 266003 China

The remote sensing methods for ship wake detection in SAR image is studied. The detection method for Kelvin ship wake is given by the research of SAR imaging of ship wake. The most oppcared ship wake is turbulent wake... 详细信息

关键词： Radar imaging Remote sensing Ships Synthetic aperture radar Velocity measurement

Production and Properties of a Thickener with Ability of Suspending Sand

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Journal of China University of Mining and Technology 2006年第2期16卷 115-118,122页

作者： QIN Bo-tao WANG de-ming LI Zeng-hua CHEN jian-hua School of Mineral and Safety Engineering China University of Mining ＆ Technology Xuzhou Jiangsu 221008 China

To overcome the shortcomings of pouring sands, a thickener with the ability to suspend sands was developed. It is mixed with sands to form densified slurry, and can insure the sands against deposition, jamming pipelines and de- hydration. The chemical structure of the thickener is introduced in this paper and the production process is studied. The main processes include immersion, decomposition, dilution and addition of additives. In order to produce a thickener with high viscosity to suspend sands, key factors must be controlled in each process: the immersion time is 2 h; the mass fraction of formaldehyde is 0.01% and mass of NaCO3 accounts for 15% of dry material; the water temperature is 65 ℃ in summer and 72 ℃ in winter and the decomposition time is 2 h in the reaction; the densified decomposition so- lution should be diluted to 1% mass fraction; the additives of calcium ions and pH indicators must be added to the di- luted liquid; the mass fraction of CaCl2 is 0.048% and the pH value of the solution is 7.5. The thickener is a gel with three-dimensional network structure, a liquid with non-Newtonian behaviour and the characteristics of pseudo-plastic material, a solution with little resistance and the ability to revive its oral primary viscosity. It has been successfully ap- plied in Shendong Mines and has great value and wide-spread prospective use.

关键词： thickener ability of suspending sand spontaneous combustion of coal

PROBLEM OF SUDdeNLY STARTING OF A VERTICAL PLATE IN deEP WATER

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Journal of Hydrodynamics 1990年第2期2卷 98-104页

作者： tao ming-de, Fudan University, Shanghai 200433, P.R. China

In this paper, we apply Lagrangian method and analyse the problem of suddenly starting of a verti- cal plate in deep water. The solutions to the problem are obtained by means of conformal mapping and Green's function. Explicit expressions of the wave shape and the pressure coefficient are obtained. The pressure coefficient has a weak singularity at the free surface. It is possible that Lagrangian method may be applied to analyse more complex problem of the transient wave.

关键词： PROBLEM OF SUDdeNLY STARTING OF A VERTICAL PLATE IN deEP WATER 罗一

A STUDY OF VELOCITY FIELD IN SHIP WAVES

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Journal of Hydrodynamics 2001年第4期13卷 42-47页

作者： tao ming-de, Liu Min-jia, Ren Jiu-chen department of Mechanics and Engineering Science, Fudan University, Shanghai 200433, China department of Mechanics and Engineering Science Fudan University

Searching ships on the ocean with the technique of the oceanic remote sensing, one must be requensted to know not only the amplitude of ship waves, but also horizontal velocities. In this article Lighthill's two-stage scheme was employed to change the integral expressions into algebraic expressions for the velocity components, so the obtained results are very succinct.

关键词： ship waves two-stage scheme horizontal velocity remote sensing

ON THE STABILITY OF A LIQUID-FILLED ROTOR

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Journal of Hydrodynamics 1994年第3期6卷 53-63页

作者： tao ming-de, Zhang Wen, Tang Jiongdepartment of Applied Mechanics Fudan University Shanghai 200433 P. R. China

The dynamic stability of a high-spinning liquid-filled rotor with both internal and external damping effects involved in is investigated in this paper. First, in the case of the rotor subjected to a transverse harmonic motion, the dynamic pressure of the liquid acting on the rotor is extracted throuhg a planar flow analysis. Then the equation of perturbed motion for the liquid-filled rotor is derived. The analytical stability criteria as well as the stability boundaries are given. The results are extensions of those given by previous literature.

关键词： rotor clamping dynamic stability routh-hurwitz criterion.

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粘性流体中船行波的完整速度场

物理学报 2005年第10期54卷 4496-4500页

作者：吴云岗陶明德复旦大学力学与工程科学系复旦大学波散射和遥感信息国家教育部重点实验室上海200433

应用Ursell求解理想船行波的方法,把它推广到粘性流体的场合,求得了粘性流体中船行波的完整的速度场,消除了由于使用最速下降法求积分的渐近表达式而引起的在临界边上的奇性.这方便于在综合孔径雷达(synthetic_aperture radar,SAR)技术... 详细信息

应用Ursell求解理想船行波的方法,把它推广到粘性流体的场合,求得了粘性流体中船行波的完整的速度场,消除了由于使用最速下降法求积分的渐近表达式而引起的在临界边上的奇性.这方便于在综合孔径雷达(synthetic_aperture radar,SAR)技术中的应用.

关键词：船行波速度场遥感渐近解粘性流体综合孔径雷达渐近表达式最速下降法 radar 应用

EXPERIMENTAL STUDY OF UNSTEADY CHARACTERISTICS OF TURBULENT MIXING LAYER FLOW OVER AN OPEN STEP AND A SQUARE-EDGED RIB

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Journal of Hydrodynamics 2007年第6期19卷 786-786页

作者： KE Feng Chen Han-ping Liu Ying-zheng He You-sheng Wu ming-lan Zhou Lian-di tao ming-de Liu Yu-lu School of Mechancial Engineering Shanghai Jiaotong University （SJTU） Shanghai 200240 China Fudan University

Spatio-temporal characteristics of the wall-bounded turbulent mixing layer flow over an open step and a square-edged rib were extensively studied in a low-speed wind tunnel. Simultaneous measurements of wall-pressure ... 详细信息

关键词： entrainment turbulent flow unsteady wall pressure fluctuations large-scale vortical structures

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量纲分析理论在交通流分析中的应用

交通运输工程学报 2005年第1期5卷 78-81页

作者：欧忠辉吴正陶明德复旦大学力学与工程科学系上海200433

针对交通流模型的多样性和同一参数测量值的变化, 分析了建模思想和测量统计方法一致性的必要。根据模型参数的物理意义,通过量纲分析方法, 对各种交通流模型及其参数进行研究,从中得到各个模型之间本质上具有相似性的基本结论,以及主... 详细信息

针对交通流模型的多样性和同一参数测量值的变化, 分析了建模思想和测量统计方法一致性的必要。根据模型参数的物理意义,通过量纲分析方法, 对各种交通流模型及其参数进行研究,从中得到各个模型之间本质上具有相似性的基本结论,以及主要无量纲参数之间的函数关系式。对交通流局部密度增大后消散问题从无量纲入手,得到的无量纲结论能够说明有量纲低速和高速交通流模型问题。此示例说明量纲分析方法对交通流模型及其参数研究具有理论和实际应用价值。

关键词：交通流模型量纲分析无量纲参数密度波消散

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部分充以粘性液体转子的动力稳定性

复旦学报（自然科学版） 2000年第1期39卷 94-96页

作者：陶明德张文复旦大学力学与工程科学系上海 200433

根据作用在部分充以粘性液体转子上压力的显式表达式 ,讨论了上述转子的动力稳定性 ,得到了一些有价值的结果 ,统一了 Hendricks和 Christenson的截然不同的结果 .认为对于给定的粘性阻尼 ,只要适当选取外阻尼数值 ,就能调整稳定区域 .

关键词：粘性液体充液转子稳定曲线动力稳定性