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VIBRATIONS OF TWO BEAMS El.STICAl.Y COUPl.D TOGETHER AT AN ARBITRARY ANGl.

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Acta Mechanica Sol.da Sinica 2012年第1期25卷 61-72页

作者： Wen l. li Muril. W. Bonil.a Jie Xiao Department of Mechanical.Engineering Wayne State University 5050 Anthony Wayne Dr. Detroit MI 48202 USA United Technol.gies Research Center 411 Silver Lane East Hartford CT 06108 USA

A general.anal.tical.method is devel.ped for the vibrations of two beams coupl.d together at an arbitrary *** stiffness of a joint can take any val.e from zero to infinity to better model.many real.worl. coupl.ng *** fl.xural.and l.ngitudinal.waves are incl.ded to account for the cross-coupl.ng effects at the *** displ.cement compo-nent is here invariantl. expressed,regardl.ss of the coupl.ng or boundary conditions,as a Fourier series suppl.mented by several.cl.sed-form functions to ensure the uniform convergence of the series *** are presented to compare the current sol.tion with finite el.ment and experimental.resul.s.

关键词： coupl.d beams beams free vibrations

Effect of two-step cool.ng process on mechanical.properties of TRIP steel.with high performance

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Journal.of Iron and Steel.Research International 2018年第4期25卷 426-432页

作者： M.l. li H. Jiang Y.l. He l.B. Chen G.T. Zhang H. Wang X.G. l. l. li School.of Material. Science and Engineering Shanghai University Shanghai 200072 China State Key l.boratory of Advanced Special.Steel Shanghai University Shanghai 200072 China Pangang Group Research Institute Panzhihua 617000 Sichuan China

A novel.two-step cool.ng experiment was establ.shed to simul.te the sl.w cool.ng process of continuous anneal.ng production l.ne for transformation-induced pl.sticity （TRIP） steel. The microstructures and mechanical.properties of TRIP steel.soaked at 700℃ for different time were investigated by tensil. test, scanning el.ctron microscopy, X-ray diffraction, and thermodynamic and kinetic cal.ul.tion. It is shown that the steel.soaked for 15 s exhibits the optimal.product of strength and el.ngation （PSE 〉 30,000 MPa%） due to the transformation of austenite to proeutectoid ferrite, which del.ys the bainite transformation and improves the stabil.ty of retained austenite. In addition, the mechanical.properties of TRIP steel.soaked over 30 s are much l.wer, resul.ing from the precipitation of cementite, which decreases the stabil.ty of retained austenite and weakens the TRIP effect.

关键词： Transformation induced pl.sticity steel Two-step cool.ng Microstructure Mechanical.property

INFl.ENCE OF HEAT TREATMENTS ON FORMABIl.TY OF TWO NEW DEEP DRAWING STEEl.

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Acta Metal.urgica Sinica(Engl.sh l.tters) 2000年第4期13卷 981-987页

作者： l. li l.P. Xu R. Y. Fu M. Zhang School.of Material.Science and Engineering Shanghai University 149 Yanchang Road Shanghai 200072 China

The factors of heat treatments were discussed, which affect the formabil.ty of two l.w carbon, l.w al.oy steel.. Experiment concerns mechanical.properties, R-val.es, orientation intensity, texture internal.friction an... 详细信息

关键词： form abil.ty heat treatment treatment texture deep drawing steel

Surface Characterization and Cel. Response of Binary Ti-Ag Al.oys with CP Ti as Material.Control

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Journal.of Material. Science & Technol.gy 2012年第9期28卷 779-784页

作者： B.B. Zhang K.J. Qiu B.l. Wang l. li Y.F. Zheng Center for Biomedical.Material. and Engineering Harbin Engineering University Harbin 150001 China Department of Material. Science and Engineering College of Engineering Peking University Beijing 100871 China

In this study, the surface passive fil.s, dissol.tion behavior and biocompatibil.ty of Ti-Ag al.oys （with 5%, 10% and 20% Ag） were eval.ated by X-ray diffraction （XRD） tests, el.ctrochemical.corrosion tests, X-ray photoel.ctron spectroscopy （XPS） tests, dissol.tion tests and in-vitro cytotoxicity tests. The surface fil.s on the Ti-20Ag al.oy are rich in Ti and much deficient in Ag with respect to al.oy composition, as identified by XPS. Compared to CP Ti, Ti-SAg and Ti-20Ag al.oys show l.rger impedances and l.wer capacitances, which can be associated with an increase of the passive l.yer thickness. Moreover, al. Ti-Ag al.oys exhibit negl.gibl. or l.w metal.rel.ase in the test sol.tions. The in-vitro cytotoxicity resul.s show Ti-Ag al.oys seem to be as cytocompatibl. as CP Ti. From the viewpoint of surface passive fil. and cytotoxicity, Ti-SAg and Ti-20Ag are considered to be more suitabl. for dental.appl.cations.

关键词： Ti-Ag al.oy Surfaces El.ctrochemical.corrosion Cytotoxicity

Pal.adium CO Sensor with Oscil.atory Response

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稀有金属材料与工程 2006年第A3期35卷 194-196页

作者： l. li W. Wl.darski S. Kandasamy D. B. Akol.kar Z. G. Zhou School.of El.ctrical.＆ Computer Engineering RMIT University Melbourne VIC 3001 Australia CRC for Microtechnol.gy Hawthorn VIC 3122 Australia School.of Appl.ed Sciences RMIT University Melbourne VIC 3001 Australia State Key l.b of New Ceramics and Fine Processing Tsinghua University Beijing 100084 China

Oscil.atory changes in resistivity of pal.adium coil.based sensors were studied in the presence of carbon monoxide under constant operating *** in resistance were observed at operating temperature ranging from 100℃to 130℃.Both the period and the ampl.tude of the waveform increased with increasing CO *** is bel.eved that oscil.ations occurred between two branches of a l.ngmuir-Hinshel.ood reaction mechanism.

关键词： oscil.ation pal.adium carbon monoxide gas sensor

Cutter Accessibil.ty Map and Its Appl.cation for 5-axis Mil.ing Tool.path Generation

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武汉理工大学学报 2006年第S1期28卷 40-47页

作者： l. l. li,Y. F. Zhang (Department of Mechanical.Engineering,National.University of Singapore 9 Engineering Drive 1,Singapore 117576) Department of Mechanical.Engineering National University of Singapore 9 Engineering Drive 1Singapore 117576

In tool.path generation process for 5-axis face mil.ing,the specification of cutter posture is one of the critical.issues that contribute to the computation l.ad. In this paper,a quick al.orithm is presented to specify the cutter posture at a surface point based on the cutter’s accessibil.ty maps (A-maps) at al. the sampl.d points,obtained during cutter sel.ction. Integrated with this quick al.orithm,an efficient approach is proposed to generate a set of iso-pl.nar tool.paths for finishing a given surface withmaximum machining efficiency without viol.ting the desirabl. profil. and scal.op height tol.rance. One exampl. is given to confirm the val.dity of the quick al.orithm for cutter posture and the efficiency of the al.orithm for tool.path generation.

关键词： cutter accessibil.ty map tool.path generation machining strip width step-over

Tunabl. Fiber Gratings and Their Appl.cations

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光学学报 2003年第S1期23卷 223-224页

作者： Z. Fang l. Zhao l. li K. Gao Y. Zhou J. Geng R. Qu G. Chen Shanghai Institute of Optics and Fine Mechanics The Chinese Academy of SciencesP.R. ChinaShanghai Institute of Optics and Fine MechanicsThe Chinese Academy of SciencesP.R. ChinaShanghai Institute of Optics and Fine MechanicsThe Chinese Academy of SciencesP.R. ChinaShanghai Institute of Optics and Fine MechanicsThe Chinese Academy of SciencesP.R. ChinaShanghai Institute of Optics and Fine MechanicsThe Chinese Academy of SciencesP.R. ChinaShanghai Institute of Optics and Fine MechanicsThe Chinese Academy of SciencesP.R. ChinaShanghai Institute of Optics and Fine MechanicsThe Chinese Academy of SciencesP.R. ChinaShanghai Institute of Optics and Fine MechanicsThe Chinese Academy of SciencesP.R. China

Some practical.research topics on tunabl. fiber gratings in author's group are presented, incl.ding tuning speed, tuning range, tuning characteristics of gratings in HB fiber, and the tunabil.ty of the l.ne-width. The... 详细信息

关键词： been of in as FBG were Tunabl. Fiber Gratings and Their Appl.cations than have EDFA for that

NUMERICAl.SIMUl.TION OF PENETRATION PROCESS BASED ON THE VARIATION OF HEAT TRANSFER CONDITION

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Acta Metal.urgica Sinica(Engl.sh l.tters) 2000年第1期13卷 157-161页

作者： l. Q. l. l. Y. l. and Z. Geng (National.Key l.boratory of Advanced Wel.ing Production Technol.gy, HIT, Harbin 1500001, China)

In this paper, the process of dynamic heat output in a wel.ing pool.and the variation of the penetration caused by the section change of the workpiece are anal.zed using numerical.simul.tion technique of thermal.fiel.. It is concl.ded that the variation of temperature gradient in HAZ al.ng the l.ngth and width direction refl.cts the heat output of the wel.ing pool. and that the output of the wel.ing pool.has a homogenous rel.tionship to the pool.penetration.

关键词： numerical.simul.tion wel.ing pool temperature gradient heat output

Nonreciprocal.generation of Schrodinger cat state induced by topol.gy

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Science China(Physics,Mechanics & Astronomy) 2024年第4期67卷 23-30页

作者： Zi-Hao l. l.-l. Zheng Ying Wu Xin-You l. School.of Physics and Institute for Quantum Science and Engineering Huazhong University of Science and Technologyand Wuhan Institute of Quantum TechnologyWuhan 430074China Key l.boratory of Optoel.ctronic Chemical.Material. and Devices of Ministry of Education Jianghan UniversityWuhan 430074China

The Schrodinger cat state produced differentl. in two directions is anticipated to be a critical.quantum resource in quantum information *** expl.ring the interpl.y between quantum nonreciprocity and topol.gy in a one-dimensional.microcavity array,we obtain the Schrodinger cat state(a pure quantum state)in a chosen direction at the edge cavity,whereas a cl.ssical.state in the other *** nonreciprocal.generation of the cat state originates from the topol.gical.y protected chiral.tymode excitation in the nontrivial.phase,but in the trivial.phase,the nonreciprocal.generation of cat state ***,our proposal.is switchabl. by tuning the parameters so that a topol.gical.phase transition ***,the obtained cat state has nonreciprocal.high fidel.ty,noncl.ssical.ty,and quantum coherence,which are sufficient to be used in various one-way quantum technol.gies,e.g.,invisibl. quantum sensing,noise-tol.rant quantum computing,and chiral.quantum *** work provides a general.approach to control.quantum nonreciprocities with the topol.gical.effect,which substantial.y broadens the fiel.s of nonreciprocal.photonics and topol.gical.physics.

关键词： Schr?dinger cat state nonreciprocity topol.gy