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EXACT SOLITARY WAVE AND QUASI-PERIODIC WAVE SOLUTIONS FOR FOUR FIFTH-ORDER NONLINEAR WAVE EQUATIONS

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EXACT SOLITARY WAVE AND QUASI-PERIODIC WAVE SOLUTIONS FOR FO...

Time-delayed feedback control optimization for quasi linear systems under random excitations

The Third International Conference on Dynamics, Vibration and Control

作者： Jibin Li department of mathematics Zhejiang {2. university Jinhua Zhejiang 32.004 P.R.china

＜正＞This talk is devoted to four kinds of fifth-order nonlinear wave equations including the Caudrey-Dodd-Gibbon *** ***-Kupershmidt equation and Sawada-Kotera equation. The exact soliton solution and quasi-periodic solutions are found by using Cosgrove’s work and the method of dynamical *** geometrical explanations of these solutions are also *** guarantee the existence of the above solutions,the parameter conditions are determined.

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来源： cnki会议评论

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Acta Mechanica Sinica 2009年第3期25卷 395-402页

作者： Xueping Li Demin Wei Weiqiu Zhu School of Civil Engineering and Transportation, South china university of Technology, 510640 Guangzhou, china department of Mechanics, State Key Laboratory of Fluid Power Transmission and Control, Zhejiang university, 31002. Hangzhou, china School of Civil Engineering and Transportation South China University of Technology 510640 Guangzhou China department of Mechanics State Key Laboratory of Fluid Power Transmission and Control Zhejiang University 310027 Hangzhou China

A strategy for time-delayed feedback control optimization of quasi linear systems with random excitation is proposed. First, the stochastic averaging method is used to reduce the dimension of the state space and to derive the stationary response of the system. Secondly, the control law is assumed to be velocity feedback control with time delay and the unknown control gains are determined by the performance indices. The response of the controlled system is predicted through solving the Fokker-Plank-Kolmogorov equation associated with the averaged Ito equation. Finally, numerical examples are used to illustrate the proposed control method, and the numerical results are confirmed by Monte Carlo simulation .

关键词： Quasi linear system Time-delayed feedback Stochastic averaging method Random excitation

Large Eddy Simulation of New Vortex Generator Enhancing Heat Exchange of Solar Energy

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湖南大学学报（自然科学版） 2009年第S1期36卷 186-192页

作者： WEN Juan,YANG Li,QI Cheng-ying(department of Thermal Power Engineering,Hebei university of Technology,Tianjin 300401,{2.) department of Thermal Power Engineering Hebei University of Technology Tianjin 300401 China

This paper put forward a new-type vortex generator enhancing heat exchange of solar air-drier and air-heater on the gas side,and investigated the mechanism of heat transfer enhancement and drag reduction by the influence of vortex generators on the coherent structure of turbulent boundary *** flow and heat transfer characteristics of rectangle channel with bevel-cut half-elliptical column vortex generators were obtained using large eddy simulation(LES)and the hydromechanics software *** instantaneous properties of velocity,temperature and pressure in channel were *** coherent structure of turbulent boundary layer flow was showed,and the characteristic of vortex induced by inclined-cut semi-ellipse vortex generator and its influence on turbulent coherent structure were *** the effect mechanism of turbulent coherent structure on flow field,pressure field and temperature field was *** on the results,the heat transfer coefficient and drag reduction of the new vortex generator with different pitch angles were ***,the coherent effects of the increased wall heat transfer and the decreased skin friction do not satisfy the Reynolds *** turbulent coherent structure can be controlled through the geometry of the vortex generator,so the heat transfer and drag reduction can also be *** we can seek suitable form of vortex generator and structure parameters,in order to achieve the enhanced heat transfer and flow of drag reduction in the solar air-heater and solar air-drier.

关键词： large eddy simulation vortex generator bevel-cut half-elliptical column coherent structure heat transfer enhancement

A NEW SYNERGIST FOR INTUMESCENT FLAME RETARDANT POLYPROPYLENE

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Chinese Journal of Polymer Science 2002年第4期20卷 377-380页

作者： Qiang Wu Bao-jun Qu State Key Laboratory of Fire Science and department of Polymer Science and Engineering university of Science and Technology of{2., Hefei 2.002.{2. Univ Sci & Technol china State Key Lab Fire Sci Hefei 230026 Peoples R China Univ Sci & Technol china Dept Polymer Sci & Engn Hefei 230026 Peoples R China

The synergistic effects of silicotungstic acid (SiW12. as a catalyst in the phosphorus-nitrogen compounds AM-based intumescent flame-retardant (IFR) polypropylene (PP) were studied using the limiting oxygen index (LOI), the UL-94 test, thermogravimetric analysis (TGA), real time Fourier transform infrared (FTIR), laser Raman spectroscopy (LRS). The LOI data show that SiW12.added to PP/IFR systems has a synergistic FR effect with an IFR additive named AM. The TGA data show that SiW12.apparently increases the thermal stability of the PP/IFR systems at high temperature (T > 500degreesC). The FTIR results provide the positive evidence that IFR can improve the thermal stability of PP and SiW12.can induce a higher rate of formation of phosphoric acid and its derivatives. The LRS measurements provide useful information on the carbonaceous microstructures. In short, a suitable amount of SiW12.(1.5 wt%) exerts synergistic effects with the IFR by increasing the LOI value and the thermal stability at high temperature and promoting the formation of charred structures on the burning PP surface.

关键词： silicotungistic acid synergistic effect intumescent flame retardant polypropylene

A Heuristic Algorithm for the Two-Machine Flowshop Group Scheduling Problem

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Journal of Systems Engineering and Electronics 2002年第4期13卷 8-16页

作者： Wang Xiuli & Wu Tihua department of Automation, Shanghai Jiaotong university, Shanghai 2.0030, P.R.{2. department of Automation Shanghai Jiaotong University Shanghai 200030 P. R. China

This paper presents the two-machine flowshop group scheduling problem with the optimal objective of maximum lateness. A dominance rule within group and a dominance rule between groups are established. These dominance rules along with a previously established dominance rule are used to develop a heuristic algorithm. Experimental results are given and analyzed.

关键词： Group scheduling Flowshop Heuristic algorithm.

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ADSORPTION OF GALLIUM WITH N_503LEVEXTREL RESIN

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中国有色金属学会会刊：英文版 1994年第3期4卷 36-40页

作者： Chen, Jianrong Hu, Jianhua Peng, Chaoqun(department of Chemistry,Zhe jiang normal {2.,Jinhua 32.00 4)

ＡＤＳＯＲＰＴＩＯＮＯＦＧＡＬＬＩＵＭＷＩＴＨＮ＿５０３ＬＥＶＥＸＴＲＥＬＲＥＳＩＮＣｈｅｎ，Ｊｉａｎｒｏｎｇ；Ｈｕ，Ｊｉａｎｈｕａ；Ｐｅｎｇ，Ｃｈａｏｑｕｎ（ＤｅｐａｒｔｍｅｎｔｏｆＣｈｅｍｉｓｔｒｙ，Ｚｈｅｊｉａ... 详细信息

ＡＤＳＯＲＰＴＩＯＮＯＦＧＡＬＬＩＵＭＷＩＴＨＮ＿５０３ＬＥＶＥＸＴＲＥＬＲＥＳＩＮＣｈｅｎ，Ｊｉａｎｒｏｎｇ；Ｈｕ，Ｊｉａｎｈｕａ；Ｐｅｎｇ，Ｃｈａｏｑｕｎ（ＤｅｐａｒｔｍｅｎｔｏｆＣｈｅｍｉｓｔｒｙ，ＺｈｅｊｉａｎｇＮｏｒｍａｌＵｎｉｖｅｒｓｉｔ...

关键词： gallium adsorption N503 levextrel resin

Numerical simulation of two-dimensional interface breakup

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Progress in Natural Science:Materials International 2006年第5期16卷 554-558页

作者： CAI Yong,MA Dongjun, SUN Dejun and YIN Xieyuan (department of Modern Mechanics, university of Science and Technology of{2., Hefei 2.002.,{2.) [a]department of Modern Mechanics University of Science and Technology of China Hefie China

The nonlinear evolution of the two-dimensional mixing layer flow of two immiscible fluids separated by the interface with surface tension is simulated numerically. The volume of the fluid method is used to capture the motion of the interface. A parametric study is conducted to investigate the effects of Weber number, Reynolds number, and the density ratio, etc. on the breaking process.

关键词： interface surface tension volume of fluid

A RHEOLOGICAL MODEL FOR POLYMER MELTS WITH INTERNAL STRUCTURE IN FLOW FIELDS

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Chinese Journal of Polymer Science 1999年第2期17卷 151-158页

作者： Chi-Xing Zhou department of Polymeric Materials Science and Engineering, Shanghai Jiao Tong university, Shanghai 2.02.0,{2. Shanghai Jiao Tong Univ Dept Polymer Mat Sci & Engn Shanghai 200240 Peoples R China

Conceptually, an imagined conformation ellipsoid is supposed to represent the shape of a polymer chain for polymer melts in flow fields and to be equivalent to the volume element in a mathematical sense in continuum mechanics. A power law dependence of shear modulus of polymer melts on detC, referred to as envelope volume, is proposed. Based on those assumptions and the non-linear relation of shear modulus, a phenomenological viscoelastic model is derived. The model is tested in simple shear flow, simple elongational flow, oscillatory shear flow, and relaxation process after flow suddenly stopped. The results show that the model works well to predict the change of internal structure and viscoelastic performance of polymer melts in flow fields.

关键词： polymer melts rheological model polymer conformation flow fields

硅团簇的结构及生长模式——紧束缚分子动力学:Si_(11)—Si_(32.

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物理学报 2004年第2期53卷 592-595页

作者：刘玉真罗成林南京理工大学应用物理系南京210094 南京师范大学物理科学与技术学院南京210019

采用紧束缚分子动力学模拟硅团簇的结构 ,通过比较它们的结合能来确定基态结构 ,最后描绘出不同尺寸所对应的径向分布函数、角分布函数 .模拟表明硅团簇在n =2.7处发生结构转变 ,从结构图上看 ,是由扁长结构向近球形结构转变 .从径向分... 详细信息

采用紧束缚分子动力学模拟硅团簇的结构 ,通过比较它们的结合能来确定基态结构 ,最后描绘出不同尺寸所对应的径向分布函数、角分布函数 .模拟表明硅团簇在n =2.7处发生结构转变 ,从结构图上看 ,是由扁长结构向近球形结构转变 .从径向分布函数图像、键角分布函数图像上也可以得到团簇结构在n =2.7处发生了变化。

关键词：硅团簇紧束缚分子动力学模拟退火基态结构径向分布函数角分布函数扁长结构近球形结构键角分布函数