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FORCES ON CYLINDERS IN COEXISTING FIELD OF REGULAR WAVES AND CURRENTS

China Ocean Engineering 1990年第1期5卷 43-54页

作者： Li Yucheng and Zhang Chunrong Professor,Dalian University of technilogy, Dalian Master, Dalian University of Technology, Dalian Dalian Univ of technilogy

Based on the linear wave theory, the lift force on the cylinder under the action of both regular waves and currents related to inline force and the resultant force has been investigated. The relationship between the hydrodynamic coefficients of resultant force Cf, of drag force Cd, of inertia force Cm and of lift force CL and the redefined KC number is reported. It is indicated that in a certain region of KC number, the influence of lift force on the resultant force can not be ignored.

关键词： FORCES ON CYLINDERS IN COEXISTING FIELD OF REGULAR WAVES AND CURRENTS

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Manifold Decomposition Processes of Silicone Vapor and Electrical Contact Failure

Manifold Decomposition Processes of Silicone Vapor and Elect...

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The 26th International Conference on Electrical contacts and the 4th International Conference on Reliability of Electrical Products & Electrical Contacts

作者： Terutaka Tamai Shigeru Sawada yasuhiro Hattori (ElConTech Consulting Ltd.) Shiroi city ChibaJapan (Mie University) Tsu city MieJapan ((autonetworls technilogy) Ltd.) YokkaichiMieJapan

ISBN: (纸本)9781622763136

Adsorbed silicone vapor on contact surfaces decomposes typically to SiO by elevated temperature due to discharge or Joule ***,even if temperature is lower than decomposition temperature,weak decomposition is induced in very complex ***,silicone molecule has an equilibrium reaction from linear molecular structure to ring structure,or its reverse reaction in the room temperature. Furthermore,in the oxidation process,as the molecular changes various structures and causes imperfect decomposition,and various types of compounds *** the present paper, electrical condition of load and occurrence of the failure due to silicone vapor contamination were discussed with practical *** it was clarified that various high polymer silicone compounds including liquid are formed by their polymerization in the decomposing ***,a mechanism of formation of carbon from the silicon vapor under this process is also discussed.

关键词： silicone vapor silicone contamination silicone compound contact failure decomposition relay

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The Linearity of the Euler Equation as a Result of the Compressibility of a Fluid

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Journal of Modern Physics 2019年第4期10卷 452-458页

作者： Vladimir Kirtskhalia I. Vekua Sokhumi Institute of Physics and technilogy (SIPT) Tbilisi Georgia Sokhumi State University Tbilisi Georgia

It is shown that when the compressibility of a fluid is taken into account, the nonlinear term disappears in the Euler equation. The validity of this approach is proved by the example of capillary waves.

关键词： Euler Equation Mass Continuity Equation Fluid Compressibility Capillary Waves

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Physico-Mechanical Characterizations of Sand Concrete: Prestressed Beams and Hollow Bricks

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Open Journal of Civil Engineering 2018年第2期8卷 256-270页

作者： El Hadji Lèye Gueye Séni Tamba Karim Limam Mamadou Lamine Lo Salah Kachkouch Laboratory for Water and Environmental Sciences and technilogy Polytechnic School of Thies Thies Senegal Laboratory of Engineering Sciences for Environment La Rochelle University La Rochelle France

The use of the sand concrete makes it possible to carry out a concrete having physico-mechanical properties answering the structural exigences and having economic and environmental advantages compared to the classical concrete. The present study aims to connecting the parameters of a formulation based on an empirical formula of Caquot in order to optimize, on the one hand the couple compressive strength/absorption of water under various degrees of hygrometry, and on the other hand more precisely to use the concrete sand in the public works sector in the prefabrication of prestressed beams and hollow bricks. The results show the importance of the type of formulation used because it takes into account the percentages of fillers of sand which is a co-product (waste) of massive rock crushing. In addition, the use of fillerized sands, which are wastes of crushing basaltic rocks and containing a small percentage of fillers, is efficient in the manufacture of prestressed beams. As for the hollow bricks, a fillerized basalt sand, containing a high percentage of filler, as well as a sand dune, gives satisfactory results.

关键词： Waste Compressive Strength Prestressed Beam Hollow Bricks

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Gaussian Beams Forward Simulation and Migration

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石油地球物理勘探 2009年第3期44卷 45-51页

作者： Deng Fei Liu Chao-ying Zhao Bo Wang Cheng-xiang Information Engineering School Chengdu Institute of Technology Chengdu Sichuan Province 610058 China Post Doc Station. BC-P Inc. of CNPC Zhuozhou Hebei Province 072751 China Geophysical technilogy Research Centre BGP Inc. of CNPC Zhuozhou Hebei Province 072751 China

本文在介绍高斯射线束原理和正演的基础上,从叠后偏移开始分析了高斯射线束偏移的基本原理,并给出了优化的思路和具体的算法流程.高斯射线束是波动方程集中于射线附近的高频近似解,高斯射线束法将射线理论和波动方程方法紧密结合在一起... 详细信息

本文在介绍高斯射线束原理和正演的基础上,从叠后偏移开始分析了高斯射线束偏移的基本原理,并给出了优化的思路和具体的算法流程.高斯射线束是波动方程集中于射线附近的高频近似解,高斯射线束法将射线理论和波动方程方法紧密结合在一起,利用高斯束替代普通射线方法中的射线进行波场正演和延拓,既保持了射线方法的高效性和灵活性,又保留了波场的动力学特征,不仅克服了普通射线方法的一些缺点,而且由于无需两点试射,因而效率非常高.将高斯射线束法引入偏移,利用高斯射线束的性质,可以解决基尔霍夫方法的多值走时问题.模型试算表明,本文介绍的高斯射线束偏移方法能够充分利用高斯射线束的优势,既具有较高的效率又能够获得较好的成像效果.

关键词：高斯光束正向模拟迁移 Kirchhoff方法射线理论波动方程模型试验射线法

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