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Ti(C, N) BASED CERAMETS AND ITS FRACTAL ANALYSIS OF FRACTURE SURFACES

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中国有色金属学会会刊：英文版 1996年第2期6卷 101-104页

作者： Liu Ning(department of Materials science and Engineering,Anhui institute of technology, Hefei 230069)Hu Zhenhua Cui Kun(huazhong university of science and technology, wuhan 430074) ANHUI INST TECHNOL DEPT MAT SCI & ENGNHEFEI 230069PEOPLES R CHINA huazhong UNIV SCI & TECHNOL WUHAN 430074PEOPLES R CHINA

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Ｔｉ（Ｃ，Ｎ）ＢＡＳＥＤＣＥＲＡＭＥＴＳＡＮＤＩＴＳＦＲＡＣＴＡＬＡＮＡＬＹＳＩＳＯＦＦＲＡＣＴＵＲＥＳＵＲＦＡＣＥＳＬｉｕＮｉｎｇ（ＤｅｐａｒｔｍｅｎｔｏｆＭａｔｅｒｉａｌｓＳｃｉｅｎｃｅａｎｄＥｎｇｉｎｅｅｒｉｎｇ，Ａｎｈｕｉｉｎｓｔｉｔｕｔｅｏ...

关键词： Ti(C, N) based ceramets fracture surface fractal analysis

Novel Wavefront Corrector for Adaptive Laser Resonator

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Chinese Journal of Lasers 1995年第1期B4卷 31-36页

作者： ZHANG Guoping YE Jiaxiong LI Zhaiguang(Mational Laboratory of Laser technology,department of Optical Engineering,huazhong university of science & technology,wuhan 430074,china) huazhong Univ of science and Technology Wuhan China

ＮｏｖｅｌＷａｖｅｆｒｏｎｔＣｏｒｒｅｃｔｏｒｆｏｒＡｄａｐｔｉｖｅＬａｓｅｒＲｅｓｏｎａｔｏｒＮｏｖｅｌＷａｖｅｆｒｏｎｔＣｏｒｒｅｃｔｏｒｆｏｒＡｄａｐｔｉｖｅＬａｓｅｒＲｅｓｏｎａｔｏｒ￥ＺＨＡＮＧＧｕｏｐｉｎ... 详细信息

ＮｏｖｅｌＷａｖｅｆｒｏｎｔＣｏｒｒｅｃｔｏｒｆｏｒＡｄａｐｔｉｖｅＬａｓｅｒＲｅｓｏｎａｔｏｒＮｏｖｅｌＷａｖｅｆｒｏｎｔＣｏｒｒｅｃｔｏｒｆｏｒＡｄａｐｔｉｖｅＬａｓｅｒＲｅｓｏｎａｔｏｒ￥ＺＨＡＮＧＧｕｏｐｉｎｇ；ＹＥＪｉａｘｉｏｎｇ；ＬＩＺｈ...

关键词： adaptive optics laser resonator tilted wave front aberration correction binary optics

A NOTE ON THE DIPERNA-LIONS FLOWS

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Acta Mathematica Scientia 2011年第5期31卷 1719-1724页

作者：刘昕黄文亮 School of Computer science and technology Huazhong University of Science and Technology department of Mathematics East China University of Science and Technology

In this note, we give a short proof for the DiPerna-Lions flows associated to ODEs following the method of Crippa and De Lellis [3]. More precisely, assume that [divb] ∈ Ll∞oc（Rd）, ｜b｜/（1 ＋｜x｜ log ｜x｜） ∈ L∞（Rd） and ｜ b｜ φ（｜ b｜） ∈ Ll1oc（Rd）, where φ（r） = log log（r ＋ c）, c 0. Then, there exists a unique regular Lagrangian flow associated with the ODE X˙（t, x） = b（X（t, x））, X（0, x） = x.

关键词： DiPerna-Lions flow Hardy-Littlewood maximal function

Structure and Magnetic Properties of Ni-doped ZnO Powder

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Journal of wuhan university of technology(Materials science) 2010年第5期25卷 770-773页

作者：高放赵俊 department of Electronic science and technology Huazhong University of Science and Technology

Ni-doped ZnO nanopowder （Zn0.98Ni0.2O） was synthesized by improved coprecipitation method. The average particle size of the powder was estimated to be 50 nm. The powder was then processed by thermal treatment. Samples were annealed at 1 073, 1 273, and 1 473 K, respectively. The solubility of NiO in ZnO and the lattice parameters of ZnO both increased with the temperature. The magnetic property of the doped samples was examined, and hysteresis loops were got. The results showed all the samples were ferromagnetic, while powder processed at 1 273 K for 4 h got a highest saturation magnetization （Ms） of 0.0457 emu/g. Also, magnetic properties were related to the grain size of the powder.

关键词： ferromagnetism diluted magnetic semiconductor Ni-doped ZnO coprecipitation solid state reaction

Particle swarm optimization algorithm for partner selection in virtual enterprise

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Progress in Natural science:Materials International 2008年第11期18卷 1445-1452页

作者： Qiang Zhao~a Xinhui Zhang~(b,*) Renbin Xiao~c a School of Mechanical science and Engineering,huazhong university of science and technology,wuhan 430074,china b department of Biomedical,Industrial & Human Factors Engineering,Wright State university,Dayton,OH 45435,USA c Institute of Systems Engineering,huazhong university of science and technology,wuhan 430074,china School of Mechanical science and Engineering Huazhong University of Science and Technology Wuhan 430074 China department of Biomedical Industrial & Human Factors Engineering Wright State University Dayton OH 45435 USA Institute of Systems Engineering Huazhong University of Science and Technology Wuhan 430074 China

Partner selection is a fundamental problem in the formation and success of a virtual *** partner selection problem with precedence and due date constraint is the basis of the various extensions and is studied in this paper.A nonlinear integer program model for the partner selection problem is *** problem is shown to be NP-complete by reduction to the knapsack problem,and therefore no polynomial time algorithm *** solve it efficiently,a particle swarm optimization(PSO)algorithm is adopted,and several mechanisms that include initialization expansion mechanism,variance mechanism and local searching mechanism have been developed to improve the performance of the proposed PSO algorithm.A set of experiments have been conducted using real examples and numerical simulation,and have shown that the PSO algorithm is an effective and efficient way to solve the partner selection problems with precedence and due date constraints.

关键词： Virtual enterprise Partner selection PSO NP-complete

STOCHASTIC HEAT EQUATIONS WITH RANDOM INITIAL CONDITIONS

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Chinese Annals of Mathematics 2005年第4期 112-123页

作者： ZHANG XICHENG department of Mathematics, huazhong university of science and technology, wuhan 430074, china.

In this paper the author constructs a solution of parabolic stochastic partial differential equation with random initial conditions by Kolmogorov’s criterion.

关键词： Stochastic partial differential equation Green’s function Kolmogorov’s criterion

ANALYSIS OF SOUND RADIATION FROM THE RING-STIFFENED CYLINDRICAL SHELL COATED WITH VISCOELASTIC LAYER IN FLUID MEDIUM

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Acta Mechanica Solida Sinica 2003年第2期16卷 155-161页

作者： Luo Dongping Cai Minbo Peng Xu Luo Bin (department of Naval and Ocean Engineering,huazhong university of science and technology,wuhan 430074,china) department of Naval Engineering Huazhong Univ. of Sci./Technology Wuhan 430074 China

The Donnell theory of shell is applied to describe shell motion and layer motion is described by means of three-dimensional Navier *** deformation harmonious condi- tions of the interface,the effects of stiffeners and layer are treated as reverse forces and moments acting on the cylindrical *** studying the acoustic field produced by vibration of the sub- merged ring-stiffened cylindrical coated shell,the structure dynamic equation,Helmholtz equation in the fluid field and the continuous conditions of the fluid-structure interface compose the cou- pling vibration equation of the *** extract of sound pressure comes down to the extract of coupling vibration *** use of the solution of the equation,the influ- ences of hydrostatic pressure,physical characters and geometric parameters of the layer on sound radiation are discussed.

关键词： viscoelastic layer ring-stiffened cylindrical coated shell coupling vibration equation sound radiation

Exploring non-equilibrium statistical ensembles

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science Bulletin 2011年第34期56卷 3654-3660页

作者： BI Qiao & LIU Jie department of physics, School of science, wuhan university of technology, wuhan 430070, china department of physics School of Science Wuhan University of Technology

Since Gibbs synthesized a general equilibrium statistical ensemble theory, generalizing the Gibbsian theory to non-equilibrium phenomena has been a dream for some theorists. However, the status of the theory for the non-equilibrium ensemble formalism is not as well established as the Gibbsian ensemble theory. In this work, we explore the formalism behind the non-equilibrium statistical ensemble theory based on the sub-dynamic kinetic equation originating from the Brussels-Austin school and developed further by others. The key is establishing a similarity transformation between Gibbsian ensembles and the sub-dynamic ensemble. Using this way, we study a spin-Boson model with strong coupling. A reduced density operator for the canonical ensemble can be easily obtained and the relevant decoherence-free property is revealed.

关键词： subdynamics statistical ensemble non-equilibrium statistical physics

Investigation on Self-Q-Switched Er3+-Doped Fiber Lasers

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Chinese Journal of Lasers 1995年第3期B4卷 211-216页

作者： SUN Junqiang HUANG Dexiu(department of Optoelectronic Engineeringhuazhong university of science and technology, wuhan 430074, china)LI Zaiguang(National Laboratory of Laser technology, wuhan 430074, china) huazhong Univ of science and Technology Wuhan China

ＩｎｖｅｓｔｉｇａｔｉｏｎｏｎＳｅｌｆ－Ｑ－ＳｗｉｔｃｈｅｄＥｒ￣（３＋）－ＤｏｐｅｄＦｉｂｅｒＬａｓｅｒｓ￥ＳＵＮＪｕｎｑｉａｎｇ；ＨＵＡＮＧＤｅｘｉｕ（ＤｅｐａｒｔｍｅｎｔｏｆＯｐｔｏｅｌｅｃｔｒｏｎｉｃＥｎｇｉ... 详细信息

ＩｎｖｅｓｔｉｇａｔｉｏｎｏｎＳｅｌｆ－Ｑ－ＳｗｉｔｃｈｅｄＥｒ￣（３＋）－ＤｏｐｅｄＦｉｂｅｒＬａｓｅｒｓ￥ＳＵＮＪｕｎｑｉａｎｇ；ＨＵＡＮＧＤｅｘｉｕ（ＤｅｐａｒｔｍｅｎｔｏｆＯｐｔｏｅｌｅｃｔｒｏｎｉｃＥｎｇｉｎｅｅｒｉｎｇＨｕａｚｈｏｎｇＵｎ...

关键词： changeable nonlinear refraction index self-Q-switching