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Journal of Hydrodynamics 2020年第5期32卷 942-952页

作者： Zhi-qiang Xin Zhi-huang wu Chui-jie wu Dan huang The College of Mechanics and Materials HoHai UniversityNanjing 211100China State Key Laboratory of Structural Analysis for Industrial Equipment and School of Aeronautics and Astronautics Dalian University of TechnologyDalianChina

The vortex-induced vibrations of a cylinder with two plates symmetrically distributed along the centerline of the wake are studied by using the fluid-structure interaction simulations on the Arbitrary Lagrangian-Eulerian *** this study,the different geo-metrical distribution parameters of the splitter plates and inflow velocities are taken into *** physical mechanisms of vortex-induced vibration of the cylinder with symmetrical plates are revealed from the cylinder amplitude,hydrodynamic force characteristics,vortex shedding frequency,and flow pattern *** results show that the dynamic interaction between the vortex shed from the oscillation cylinder and plates is responsible for the wake stabilization mechanism,and the stable wake and the dynamic response reduction of the main cylinder can be achieved at a wide range of reduced velocities by placing sym-metrical sheets at suitable locations.

关键词： Cylinder vortex-induced vibrations splitter plates vibration control flow pattern

INTELLIGENT CONTROL SYSTEM OF PULSED MAG WELDING INVERTER BASED ON DIGITAL SIGNAL PROCESSOR

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Chinese Journal of Mechanical Engineering 2008年第6期21卷 86-90页

作者： wu Kaiyuan huang Shisheng wu Shuifeng LI Xinglin School of Mechanical Engineering South China University of Technology Guangzhou 510640 China

A fuzzy logic intelligent control system of pulsed MAG welding inverter based on digital signal processor （DSP） is proposed to obtain the consistency of arc length in pulsed MAG welding. The proposed control system combines the merits of intelligent control with DSP digital control. The fuzzy logic intelligent control system designed is a typical two-input-single-output structure, and regards the error and the change in error of peak arc voltage as two inputs and the background time as single output. The fuzzy logic intelligent control system is realized in a look-up table （LUT） method by using MATLAB based fuzzy logic toolbox, and the implement of LUT method based on DSP is also discussed. The pulsed MAG welding experimental results demonstrate that the developed fuzzy logic intelligent control system based on DSP has strong arc length controlling ability to accomplish the stable pulsed MAG welding process and controls pulsed MAG welding inverter digitally and intelligently.

关键词： Pulsed MAG welding inverter Arc length control Fuzzy logic intelligent control Digital signal processor (DSP)

Large Number,Dark Matter,Dark Energy,and Superstructures in the Universe

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Communications in Theoretical Physics 2009年第3期51卷 575-576页

作者： huang wu-Liang huang Xiao-Dong Institute of High Energy Physics Chinese Academy of Sciences P.O. Box 918（3） Beijing 100049 China Department of Mathematics University of California Los Angeles Los Angeles CA 90095 U.S.A.

Since there may exist dark matter particles ν and δ with mass - 10^-1 e V in the universe, the superstructures with a scale of 10^19 solar masses （large number A - 10^19） appeared during the era near and before the hydrogen recombination. Since there are superstructures in the universe, there may be no necessity for the existence of dark energy. For checking the superstructure in the universe by CMB anisotropy, we need to measure CMB angular power spectrum especially around ten degrees across the sky- in more details, While neutrino u is related to electroweak unification, the fourth stable elementary particle 6 may be related to strong-gravity unification, which suggests p ＋ p^- → n ＋ δ^- and that some new baryons appeared in the TeV region.

关键词： large number dark matter dark energy stable elementary particle superstructure

Precise Integration Method of C-integral for Linear Viscoelastic Solids with Crack

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上海交通大学学报 2004年第z2期38卷 25-31页

作者： Liu Jinghua wu Changchun huang Ruoyu School of Naval Arch. Ocean & Civil Engineering Shanghai Jiaotong Univ. Shanghai200030 China School of Naval Arch. Ocean & Civil Engineering Shanghai Jiaotong Univ. Shanghai200030 China School of Naval Arch. Ocean & Civil Engineering Shanghai Jiaotong Univ. Shanghai200030 China

Generally, viscoelastic solid constitutive equation can be written into differential form and integral form. From differential form of constitutive equation the mathematical representation of the state space equation can be derived. Due to the state space equation, general constitutive equation can be solved by precise integration method that can be used in many fields with the advantages of highly precision and convenience. For linear viscoelastic solids with crack, the finite elements program of the precise integration method for viscoelastic solid is developed, which appears to be efficient and precise. C-integral is used to be the characterising parameter.

关键词： precise integration C-integral viscoelastic finite element

Electroless plating of Ni-Zn(Fe)-P alloy on carbon steel sheets

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中国有色金属学会会刊：英文版 2004年第z1期14卷 157-161页

作者： WANG Sen-lin wu Hui-huang College of Materials Science and Engineering Huaqiao University Quanzhou 362021 China State Key Laboratory for Physical Chemistry of Solid Surface Department of ChemistryXiamen University Xiamen 361005 China State Key Laboratory for Physical Chemistry of Solid Surface Department of ChemistryXiamen University Xiamen 361005 China

The autocatalytic deposition of Ni-Zn(Fe)-P alloys were carried out on carbon steel sheets from bath containing nickel sulfate, zinc sulfate, sodium hypophosphite, sodium citrate and boric acid. The effects of pH and mole ratio of NiSO4/ZnSO4 on the deposition rate and the composition of deposit were studied. It is found that the presence of zinc sulfate in the bath has an inhibitory effect on the alloy deposition. As a consequence, the mole fraction of zinc in the deposits never reaches high value, which is less than 18.0%. The structure and surface morphology of Ni-Zn(Fe)-P coatings were charactered by XRD and SEM. The alloys plated at all conditions consist of amorphous phase coexisting with a crystalline cubic Ni phase. The surface morphology of coating is dependent on the deposition parameters.

关键词： electroless plating nickel zinc

Quantitative Analysis of Graphene Sheet Content in Wood Char Powders during Catalytic Pyrolysis

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Journal of Materials Science & Technology 2013年第5期29卷 406-410页

作者： Yan-Jia Liou wu-Jang huang Department of Environmental Engineering and Science National Ping-Tung University of Science and TechnologyPing-Tung CountyTaiwanChina

The quantitative characterization of the graphene sheet content in carbon-containing materials is arguable and has not yet been developed. The authors report on a feasible method to characterize graphene sheet content quantitatively in pyrolized carbon materials using an X-ray diffraction （XRD） spectrometer. A direct carbonation at 300℃ followed by catalytic pyrolysis （heat-treatment temperature was set at 700-1400 ℃） under a vacuum condition was used for turning wood waste into pyrolized wood char powders. The graphene content in the samples was calculated through an analysis of full width at half maximum （FWHM） of the carbon （100） crystal plane at around 42°-43° in XRD. Results showed that the FWHM and the calculated graphene sheet content of pyrolized wood char powders depended on the heat-treatment temperature, and the FWHM of wood char powder with well-developed graphene sheets （100%） was determined to be 5.0. In addition, the trend to 100% graphene sheet-contained pyrolized carbon powder was obtained at a heattreatment temperature of 2700 ℃. The resistivity of the wood char powder with 100% graphene sheets was predicted to be 0.01 Ω cm, close to our experimental data of 0.012 and 0.006 Ω cm for commercial graphite and graphene products, respectively.

关键词： Wood char Full width at half maximum Graphene Pyrolysis

High Temperature Phase Transitions of Graphene Oxide Paper from Graphite Oxide Solution

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Journal of Materials Science & Technology 2014年第11期30卷 1088-1091页

作者： Yan-Jia Liou wu-Jang huang Department of Environmental Engineering and Science National Ping-Tung University of Science and Technology

Graphene oxide paper （GOP） can be prepared through simplified filtration of a graphite oxide solution. It possesses similar properties to graphene. In this study, the graphite oxide solution was synthesized from commercial graphite by means of Hummer＇s method. It corresponds to the dried GOP that was prepared by deposition on a cellulose filter. It is found that the mesophase of the dried graphene oxide papers obtained from the graphite was thermotropic hexagonal columnar liquid crystal. Its higher temperature transitions were found at 80 ℃, 150 ℃ and 170 ℃-180 ℃. Therefore, it could be used for thermal storage and conductive materials in the future.

关键词： Graphite oxide Graphite Graphene Phase transition

Novel Localized Excitations of Nonlinear Coupled Scalar Fields

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Communications in Theoretical Physics 2008年第6期49卷 1365-1372页

作者： LI Jin-Hua wu huang-Jiao Department of Physics and Center of Nonlinear Science Ningbo University Ningbo 315211 China

Some extended solution mapping relations of the nonlinear coupled scalar field and the well-known φ^4 model are presented. Simultaneously, inspired by the new solutions of the famous φ^4 model recently proposed by Jia, huang and Lou, five kinds of new localized excitations of the nonlinear coupled scaiar field （NCSF） system are obtained.

关键词： nonlinear coupled scalar field solitary wave structure mapping and deformation approach

Strategy for the mapping of interactive genes using bulked segregant analysis method and Mapmaker/Exp software

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Chinese Science Bulletin 2006年第21期51卷 2619-2623页

作者： wu Weiren huang Biguang College of Crop Science Fujian Agriculture and Forestry UniversityFuzhou350002 China

A qualitative trait is usually controlled by a single gene, but it may be sometimes controlled by two or even more genes. This phenomenon is called gene interaction. Rapidly searching for linked mo- lecular markers via bulked segregant analysis (BSA) and then constructing regional linkage map with Mapmaker/Exp has become a common approach to mapping single major genes. However, methods and computer programs developed for mapping single major genes cannot be simply applied to interactive genes because the genetic patterns of gene interac- tions are quite different from that of single-gene in- heritance. Up to now, experimental methods for quickly screening molecular markers linked to inter- active genes and statistical methods and corre- sponding computer softwares for simultaneously analyzing the linkage relationships of multiple mo- lecular markers to an interactive gene have not been available. To solve this problem, in this paper, we propose a strategy for mapping interactive genes using BSA and Mapmaker/Exp. We demonstrate that all interactive genes can be mapped by the 'BSA + Mapmaker/Exp' strategy using F2 generation (in a few cases, F3 generation is also needed). As BSA and Mapmaker/Exp have been broadly used in gene mapping studies and are well known by many re- searchers, the strategies proposed in this paper will be useful for practical researches.

关键词：基因相互作用基因作图制图软件安全

Symplectic integrators with potential derivatives to third order

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Research in Astronomy and Astrophysics 2011年第3期11卷 353-368页

作者： Wei Sun Xin wu Guo-Qing huang Institute of Astronomy ＆ Department of Physics Nanchang University Nanchang 330031 China

An operator associated with third-order potential derivatives and a force gradient operator corresponding to second-order potential derivatives are used together to design a number of new fourth-order explicit symplectic integrators for the natural splitting of a Hamiltonian into both the kinetic energy with a quadratic form of momenta and the potential energy as a function of position *** simulations show that some new optimal symplectic algorithms are much better than their non-optimal counterparts in terms of accuracy of energy and position calculations.

关键词： celestial mechanics—methods:numerical