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InteractionofVorticeswithaProgresiveSurfaceWave

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Communications in Nonlinear Science and Numerical Simulation 1996年第2期 58-63页

作者： 1,2.Linlin WANG, Huiyang MA (graduate School of Academic Sinica, beijing, {2.)

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关键词： Vortex Surface Gravity Wave Finite difference Method.

Distribution Features of the Residual Stress For T-Joints by Laser Welding

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稀有金属材料与工程 2011年第S4期40卷 130-133页

作者： He Enguang1,Gong Shuili1,Wu Bing1,2.Chen Li1 1Science and Technology on Power Beam Processes Laboratory,AVIC beijing Aeronautical Manufacturing Technology Research Institute,beijing 10002.,{2. 2.School of Material Science and Engineering,Xi`an Jiaotong university,Xi`an 71004.,{2. AVIC beijing Aeronaut Mfg Technol Res Inst Sci & Technol Power Beam Proc Lab Beijing 100024 Peoples R China Xi An Jiao Tong Univ Sch Mat Sci & Engn Xian 710049 Peoples R China

The residual stress of T-joints for SUS304.stainless steel by YAG laser welding was measured by the method of hole-drilling,and the effects of heat treatment and hardness distribution of weld joints on the distribution of residual stress for T-joints were *** results showed that the maximum of longitudinal residual tensile stress for T-joints was about *** maximum of residual stress was not more than 4.MPa after heat treatment,the peak of residual stress reduced *** gradient of residual stress distribution was also reduced *** hardening phenomenon occurred for T-joints,and the hardness of weld and heat affected zone was both higher than the hardness of base metal,the peak of hardness occurred in the fusion *** effect of strain hardening phenomenon of weld and heat affected zone on the residual stress distribution of T-joints for SUS304.stainless steel was obvious,which made longitudinal residual tensile stress become higher.

关键词： stainless steel laser welding T-joints heat treatment

Oil accumulation related to migration of source kitchens in the Lukeqin structural belt, Turpan-Hami Basin, china

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Petroleum Science 2010年第3期7卷 355-361页

作者： Liu Bo Huang Zhilong Tu Xiaoxian Sang Tingyi Chen Xuan State Key Laboratory of Petroleum Resource and Prospecting China University of Petroleum Beijing 102249 China Petrochina Turpan-Hami Oilfield Company Hami Xinjiang 839009 China

The Lukeqin structural belt is the main heavy oil accumulation zone in the Turpan-Hami Basin. The recent discovery of light oil in the Triassic indicates that there may be multiple source kitchens contributing to the oil accumulation. According to oil geochemical analysis and oil-source correlation, the oil in deep and shallow reservoirs of the Lukeqin Oilfield presents different physical and saturated hydrocarbon mass spectrum characteristics. The Triassic heavy oil is from the northern Upper Permian lacustrine source rocks, and the light oil represented by the Yudong-9 Well is from the northwestern Lower Jurassic coal-measure source rocks. The timing of oil charging was determined by K/Ar isotope dating, reservoir fluid inclusion analysis and the evolution history of different source rocks. In summary, the accumulation process consists of two stages. From the end of Triassic to early Jurassic, the northern Permian source kitchen generated a considerable amount of oil, which was finally degraded to heavy oil, migrated to the south and then accumulated. The northwestern Jurassic coal-measure source kitchen began to generate oil at the end of Cretaceous, while the northern source kitchen could only generate a little hydrocarbon. The heavy oil and the light oil have different source rock locations, migration directions and accumulation times. The migration of hydrocarbon source kitchens affects the distribution of heavy oil and light oil reservoirs at the present time.

关键词： Source kitchen light oil oil-source correlation timing of oil charging Turpan-Hami Basin

APPLICATION OF THE MULTIGRID METHOD IN NUMERICALSIMULATION OF SEDIMENT TRANSPORT

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International Journal of Sediment Research 1999年第2期14卷 133-143页

作者： ZHAO Yongqing and FANG HongWei ( Sediment Research Lab, Tsinghua university, beijing 100084.{2.)

By combining FAS (Full Approximate Scheme) for nonlinear equations of multigrid method with Finite Volume Method, a plane two-dimensional mathematical model of sediment-transport is presented in this paper The analysis on the efficiency of this model shows that it can reduce the amount of computation greatly. Numerical simulation results of the Yellow River Langdian Water Source Project agree well with the test results of the physical model.

关键词： Multigrid method Mathematical model Sediment transport

DESIGN EFFICIENCY FOR MINIMUM PROJECTION UNIFORMITY DESIGNS WITH TWO LEVELS

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Journal of Systems Science & Complexity 2011年第4期24卷 761-768页

作者： Hong QIN Na Z0U Shangli ZHANG Department of Statistics Central China Normal University Wuhan 430079 China. Department of Mathematics Beijing Jiaotong University Beijing 100044 China.

The objective of this paper is to study the issue of design efficiency for minimum projection uniformity designs. The results show that for orthogonal arrays with strength two, the minimum projection uniformity criter... 详细信息

关键词： Generalized minimum aberration minimum projection uniformity orthogonal array uniform design.

Identifying Machine Query for an Intelligent Web Browser System

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HIGH-TEMPERATURE TEM IN SITU STUDY OF GROWTH KINETICS OF BAINITE IN β BRASS

2.10 IEEE 2.d Symposium on Web Society

作者： Tmgshao Zhu graduate university of Chinese {2. of sciences {4.,china Xmguo Xu National Computer System Engineering Research Institute of china {4.,china Guohua Liu Department of Computing Science university of Alberta Edmonton,Canada

＜正＞This paper describes our research on learning browsing behavior model for predicting the current information need of a web *** inference is based on a parameterized model of how the sequence of browsing behavior indicates the degree to which page content satisfies the user’s information need,and the model parameters can be estimated using standard methods from a labelled *** from lab experiments demonstrate that the prediction model can effectively identify the information needs of new users,browsing previously unseen *** paper concludes with an overview of our WebIC which integrates the model into a web browser, to help the user find the relevant information effectively from the web.

关键词： Browsing Behavior Model Machine Learning Web Browser

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Acta Metallurgica Sinica(English Letters) 1992年第5期5卷 309-313页

作者： YANG Yanqing LIU Donghui KANG Mokuang Northwestern Polytechnical university,Xi’an,chinaSUN Yuan {2. Centre of Physical and Chemical Analysis,{2.,china Northwestern Polytechnical Univ Xi'an China

In situ observation of the growth process of bainitic plate in βbrass by means of high-temper- ature TEM is *** lengthening and thickening kinetics of bainitic plate is analysed with Trivedi's model and Zener-Hillert's model,*** is found that the stacking fault substructure exists just in the growth tip of fresh bainitie plate and so does the shear stress in the matrix around the *** measured lengthening rate of bainitic plate is not con- sistent with Trivedi's *** thiekening process is only macroscopieally controlled by vol- ume diffusion but its nature is a shear process.

关键词： β-brass bainite growth kinetics shear volume diffusion

Temperature Field and Microstructural Formation of Semi-Solid AlSi_7Mg Alloy

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International Journal of Minerals,Metallurgy and Materials 2000年第2期14卷 99-102页

作者： Weimin Mao Aimin Zhao Yan jun Li Chenglin Cui Feng Sun Xuryou Zhong(Material Science and Engineering School, university of Science and Technology beijing, beijing 100083, china) Material Science and Engineering School University of Science and Technology Beijing Beijing 100083 China

The microstructural formation of the semi-solid AlSi7Mg alloy stirred by electromagnetic field is investigated together withthe tempeatre field of the stirred melt at continuously cooling. A impoat kinetic factor for primny a-Al nucleation is proposed. It isfound that a low temperatUre gradient exists in the electromagnetic stirred melt. This is why the first dendritic arms and secondary de-ndritic arms are refmed. Experimefltal results also show that the root remelting of secontw dendritic arms is an twortat mechanismfor the primary α-Al refmement. Strong electromagnetic stirring greatly reduces the composition supercooling in the melt and eliminatesprefedrig growth of the first dendritic arms. Therefore, many rosettes or spherical Primary α-Al phase particles form finally.

关键词： AlSi_7Mg alloy semi-solid electromagnetic stirring

Reliability of paste fill system of the Jinchuan No.2.mine

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Journal of university of Science and Technology beijing 2002年第3期9卷 166-169页

作者： Sijing Cai and Changjie ChenCivil and Environmental Engineering School, university of Science and Technology beijing, beijing 100083, china (Received {4.01-10-{4.) Civeil and Environmental Engineering School University of Science and Technology Beijing Beijing 100083 China ***

Because of poor ground conditions, stoping methods of underhand headings withcemented fill were used in the Jinchuan No. 2.mine, a paste fill system was set up. In order toevaluate the reliability of the new system, investigations and trial running have been done. Morethan 2. items of modification or improvements related to paste preparation subsystem, pump and pipesubsystem, auto-controlling and monitoring subsystem were finished. The reliability of the pastefill system was analyzed by using the theory of large complex system, and it is useful inreliability study on paste fill system.

关键词： paste fill system reliability study complex system theory