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Embed-Solitons and Their Evolutional Behaviors of (3+1)-Dimensional Burgers System

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Communications in Theoretical physics 2007年第7期48卷 57-62页

作者： ZHU Hai-Ping ZHENG Chun-Long College of Mathematics and physics,Lishui University,Zhejiang 323000,china2 Shanghai institute of Applied Mathematics and Mechanics,Shanghai University,Shanghai 200072,china College of Mathematics and physics Lishui University Zhejiang 323000 China

With the help of an extended mapping approach and a linear variable separation method,new families ofvariable separation solutions with arbitrary functions for the(3+1)-dimensional Burgers system are *** onthe derived exact solutions, some novel and interesting localized coherent excitations such as embed-solitons are revealedby selecting appropriate boundary conditions and/or initial *** time evolutional properties of the novellocalized excitation are also briefly investigated.

关键词： extended mapping method (3+1)-dimensional Burgers system embed-soliton evolutional behavior

One-pot synthesis of crystalline SnO_2 nanoparticles and their low-temperature ethanol sensing characteristics

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Science china(physics,Mechanics & Astronomy) 2009年第10期52卷 1601-1605页

作者： CHEN YuJin1,2,3,ZHU ChunLing4,WANG LiJiao3 & WANG TaiHong2 1 School of Materials Science and engineering,Beijing institute of Technology,Beijing 100081,china 2 Micro-Nano Technologies Research Center,Hunan University,Changsha 410082,china 3 College of Science,Harbin engineering University,Harbin 150001,china 4 College of Material Science and Chemical engineering,Harbin engineering University,Harbin 150001,china School of Materials Science and engineering Beijing Institute of Technology Beijing China Micro-Nano Technologies Research Center Hunan University Changsha China College of Science Harbin Engineering University Harbin China College of Material Science and Chemical engineering Harbin Engineering University Harbin China

Crystalline SnO2 nanoparticles(NPs) with a diameter less than 6 nm are synthesized using potassium stannate trihydrate as the precursor in a basic *** synthesized NPs can detect ethanol at a ppm level even at 100℃.Furthermore,the NPs have good selectivity to *** excellent ethanol sensing performances are attributed to the small size effect according to the space-charge model.

关键词： SnO2 nanoparticles sensing characteristics

Investigation of nano-talc as a filling material and a reinforcing agent in high density polyethylene (HDPE)

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Rare Metals 2006年第z1期25卷 422-425页

作者： CHEN Nanchun MA Lei ZHANG Tao Center for Material engineering Guilin Institute of Technology Guilin 541004 China Key Laboratory of Nonferrous Materials and Processing Technology Ministry of Education Guilin Institute of Technology Guilin 541004 China Department of Physics and Information Technology Yulin Teachers'' College Yulin 537000 China Center for Material Engineering Guilin Institute of Technology Guilin 541004 China Key Laboratory of Nonferrous Materials and Processing Technology Ministry of Education Guilin Institute of Technology Guilin 541004 China

An experiment of producing high density polyethylene (HDPE) nano-composite filled with 4wt.% talc was presented. Acting as filler and a reinforcing agent in the HDPE, talc powder, sized at around 5 μm, was surface-treated with aluminum diethylene glycol dinitrate coupling agent before adding to the HDPE. Analyses of the reinforced HDPE nano-composite show significant improvement in its mechanical properties including, tensile strength (>26 MPa), break elongation (22 MPa), and friction coefficients<0.11. The results demonstrate that, after surface-treated, talc can be used as a promising filling material and a reinforcing agent in making HDPE nano-composite.

关键词： HDPE talc filling material reinforcing agent nano-composite mechanical properties

Synthesis, Microstructure and Optical Absorption of Coatings with Doping of Nano-TiO_2 for Protection Against UltravioletIrradiation

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Journal of Materials Science & Technology 2000年第3期16卷 277-280页

作者： Ye ZHANG and Lide ZHANG (institute of Solid State physics, Chinese Academy of Sciences, Hefei 230031, china) Chimei MO, Yuanhong LI, Lianzeng YAO and Weili CAI (Department of Materials Science and engineering, University of Science and Technology of china institute of Solid State physics Chinese Academy of Sciences Hefei 230031 China Department of Materials Science and engineering University of Science and Technology of China Hefei 230026 China

The synthesis of dispersions of MMA (methylmethacrylate) with different concentrations of oleic acid coated nano-TiO_2 particles was performed by hydrolysis of TiCI_4 in the mixture solutions of MMA, oleic acid and H_2O with various concentrations. When MMA: oleic acid: H_2O : TiCi_4 =1.00: 0.064 : 0.01: 0.032 (by mol fraction), the dispersion of MMA with oleic acid coated nano-TiO_2 particles was very stable. Optical absorption result showed that the absorption band was located in the ultraviolet range from 200 to 400 nm. This dispersion was added to a kind of automobile surface lustering agent (type II), and then this lustering agent with nano-TiO_2 was coated on the surface of automobile surface paint. When the doping amount of the dispersion in the lustering agent=10 vol. pct, the state of paint (color and glossiness) did not present any change after irradiation of an ultraviolet lamp with the power of 1000 watt for two days. The sample with surface paint and lustering agent doped by 10 percent dispersion after suffering from irradiation of the sunlight for half a year (from May to November) kept the original state. However, for the samples with automobile paint and lustering agent without doping of nano- TiO_2, the color and glossiness lost easily after irradiation of an ultraviolet lamp. These results prove that nano-TiO_2 is a kind of high-efficient additive of paint for protection against ultraviolet irradiation.

关键词： Nano TiO

xF(or y)-Dependence of Nuclecir Absorption and Energy Loss Effects on J/ψ Production

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Communications in Theoretical physics 2009年第12期52卷 1049-1054页

作者： WANG Hong-Min,~(1,*) SUN Xian-Jing,~2 and ZHANG Ben-Ai~31 physics Department, Academy of Armored Forces engineering of PLA, Beijing 100072, china2 institute of High Energy physics, Chinese Academy of Sciences, Beijing 100049, china3 institute of Applied physics and Computation Mathematics, Beijing 100088, china

By means of the nuclear parton distribution studied only with lepton deep-inelastic scattering experimentaldata,the J/φ"normal nuclear absorption"and energy loss effects are studied in a Glauber formalism at HERA andRHIC *** that the absorption cross section σincreases with the charmonium-nucleon center of massenergy,the results reveal a significant dependence of the σon rapidity y at RHIC *** initial-state energyloss effect,which is found important only at HERA energies,is also considered,and its influence should be eliminatedwhen we studied the absorption effect at low collision ***,we also present the theoretical prediction forLHC.

关键词： x_F (or y)-dependence of absorption effect Glauber formalism energy loss

Chromatic Uniqueness of K4-Homeomorphs with Girth 8

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Journal of Mathematical Research with Applications 2012年第3期32卷 269-280页

作者： Weina SHI 1 ,Yongliang PAN1,Yan ZHAO 2 1.Department of Mathematics,University of Science and Technology of china, Anhui 230026,P.R.china 2.institute of Electronics engineering,china Academy of engineering physics, Sichuan 621900,P.R.china Department of Mathematics University of Science and Technology of China Anhui 230026 institute of Electronics engineering China Academy of Engineering Physics Sichuan 621900

In this paper,we determine all graphs of K4-homeomorphs of girth 8 which are chromatically unique.

关键词： chromatic polynomial chromatically unique graph K4-homeomorph.

Preparation of grain size controlled boron-doped diamond thin films and their applications in selective detection of glucose in basic solutions

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Science china Chemistry 2010年第6期53卷 1378-1384页

作者： ZHAO JianWen1,2,WANG JinLiang3,ZHI JinFang3 & ZHANG ZhiMing4 1College of Chemistry and Chemical engineering,Jishou University,Jishou 416000,china 2Schools of Materials Science and engineering,Nanyang Technological University,639798,Singapore 3Laboratory of Organic Optoelectronic Functional Materials and Molecular engineering,Technical institute of physics and Chemistry & Graduate University of Chinese Academy of Sciences,Beijing 100080,china 4Research institute of Micro-Nano Science and Technology,Shanghai Jiao Tong University,Shanghai 200030,china College of Chemistry and Chemical engineering Jishou University Jishou China Schools of Materials Science and engineering Nanyang Technological University Singapore Singapore Laboratory of Organic Optoelectronic Functional Materials and Molecular engineering Technical Institute of Physics and Chemistry & Graduate University of Chinese Academy of Sciences Beijing China Research institute of Micro-Nano Science and Technology Shanghai Jiao Tong University Shanghai China

Boron-doped diamond (BDD) thin films with different crystal grain sizes were prepared by controlling the reacting gas pressure using hot filament chemical vapor deposition (HFCVD).The morphologies and structures of the prepared diamond thin films were characterized by scanning electron microscopy (SEM) and Raman *** electrochemical responses of K4Fe(CN)6 on different BDD electrodes were *** results suggested that electron transfer was faster at the boron-doped nanocrystalline diamond (BDND) thin film electrodes in comparison with that at other BDD thin film *** prepared BDD thin film electrodes without any modification were used to directly detect glucose in the basic *** results showed that the as-prepared BDD thin film electrodes exhibited good selectivity for detecting glucose in the presence of ascorbic acid (AA) and uric acid (UA).The higher sensitivity was observed on the BDND thin film grown on the boron-doped microcrystalline diamond (BDMD) thin film surface,and the linear response range,sensitivity and the low detection limit were 0.25–10 mM,189.1 μA mmol-1 cm-2 and 25 μM (S/N=3) for glucose in the presence of AA and UA,respectively.

关键词： diamond thin films electrochemical properties selective glucose detection

An Asymptotic Solvable Multiple “Look-Ahead” Model with Multi-weight

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Communications in Theoretical physics 2007年第12期48卷 1088-1092页

作者： SHI Wei~1 CHEN Ning-Guo~1 and XUE Yu~(1,2)~1 institute of Physical Science and engineering,Guangxi University,Nanning 530004,china~2 Shanghai institute of Applied Mathematics and Mechanics,Shanghai University,Shanghai 200072,china institute of Physical Science and engineering Guangxi University Shanghai institute of Applied Mathematics and Mechanics Shanghai University

A type of multiple "look-ahead" car-following models is studied by nonlinear *** mKdV equationto describe density wave of traffic jamming is *** result indicates that the behavior of multiple "look-ahead"is in favor of stability enhancement of traffic ***,the traffic flow can reach the most stable case viaadjustment of the parameter of weight functions m=3.

关键词： traffic flow car-following model nonlinear analysis mKdV equation

MICROSTRUCTURE IN LASER FUSED HIGH SPEED STEEL W6Mo5Cr4V2(M2)

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Acta Metallurgica Sinica(English Letters) 1993年第1期6卷 36-39页

作者： LIU Ning CUI Kun Huazhong University of Science and Technology,Wuhan.china DENG Zonggang Hefei University of Technology,Hefei,china CHENG Benpei KONG Jie institute of Solid State physics,Academia Sinica,Hefei,china Doctorate student,Department of Mechanical engineering No.2,Huazhong University of Science and Technology,Wuhan 430074,china Huazhong Univ of Science and Technology Wuhan China

Microstructure of the deepest zone of high speed steel W6Mo5Cr4V2(M2)melt after laser fu-sion was found to be so fine as the ehill zone of a solidified *** narrower chill zoneformed,the long columnar dendrites grow into the melt and then the fine equiaxed cellularstructure appears in upper melt region nearly *** substructure of cellular grains anddendrites was observed to consist of martensite and retained austenile,while the carbides asM_6C_■ Cr_7C_3 and MC distributed at their *** is believed that the highermicrohardness up to HV_(0.1)=865-960 of the laser fused structure of the alloy is due to the oc-currence of martensite.

关键词： High speed steel W6Mo5Cr4V2(M2) laser fused treatment micrstructure