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Ex.ernal-Cavity Tunable Laser Using m.m. Technology

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光学学报 2003年第S1期23卷 433-434页

作者： J. Z. Hao x. m. zhang C. Lu A. Q. Liu Institute for Infocom. Research Unit 230 Innovation Center Block 2 18 Nanyang Drive Singapore 639798School of Electrical & Electronic Engineering Nanyang Technological University Nanyang Avenue Singapore 639798School of Electrical & Electronic Engineering Nanyang Technological University Nanyang AvenueSingapore 639798 Institute for Infocomm Research Unit 230 Innovation Center Block 2 18 Nanyang Drive Singapore 639798School of Electrical & Electronic Engineering Nanyang Technological University Nanyang Avenue Singapore 639798

This paper introduces a tunable ex.ernal-cavity diode laser using a m.m. vertical m.rror fabricated on a silicon-on-insulator (SOI) wafer. This laser has the m.rits of sim.le alignm.nt process, easy integration/packag... 详细信息

关键词： m.m. as in on be with Ex.ernal-Cavity Tunable Laser Using m.m. Technology for m.de of dBm from

Local Orientation Field Based Nonlocal m.ans m.thod for Fingerprint Im.ge De-Noising

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Journal of Signal and Inform.tion Processing 2013年第3期4卷 150-153页

作者： J. Zou J. B. Feng x. m. zhang m. Y. Ding School of Life Science and Technology Huazhong University of Science and Technology Wuhan China.

The de-noising of the fingerprint im.ge is one of the key tasks before the ex.raction of the m.nutiae in autom.tic fingerprint m.tching. When used for de-noising the fingerprint im.ge, the nonlocal m.ans m.thod can not preserve the local m.nutiae in the fingerprint im.ge very well. To address this problem. we propose a local orientation field based nonlocal m.ans (NLm.LOF) m.thod in this paper. Ex.erim.ntal results on the sim.lated and real im.ges show that the proposed m.thod can suppress noise effectively while preserving edges and details in the fingerprint im.ge and it outperform. the state-of-art nonlocal m.ans m.thod in term. of qualitative m.trics and visual com.arisons.

关键词： Fingerprint Im.ge Denoising Nonlocal m.ans Filtering Orientation Field

STUDY ON DIFFUSION WELDING OF ALUm.NIUN m.TRIx.COm.OSITE

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Acta m.tallurgica Sinica(English Letters) 2000年第1期13卷 12-17页

作者： J. T. Niu L. m. Liu J. P. Zhai J. Yu x. m. zhang (National Key Laboratory of Advanced Welding Production Technology, HIT, Harbin 750001, China)

Effects of diffusion welding param.ters on strength of welded joint based on particle reinforced alum.ni- um.m.trix.com.osite Al2O3p/6061Al were studied by com.aring with alum.nium.m.trix.alloy,m.cha- nism.for the loss of joint strength was *** was pointed out that the key processing param.ters affecting the strength of joint was the welding *** high quality joint can be successfully obtained with appropriate diffusion welding param.ters.

关键词： particle reinforced alum.nium.m.trix.com.osite,diffusion welding ox.de film

Nonlinear study of the dynam.c behavior of a string-beam.coupled system.under com.ined ex.itations

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Acta m.chanica Sinica 2011年第6期27卷 1034-1051页

作者： Y.S. Ham.d m. Sayed D.-x. Cao W. zhang Departm.nt of Engineering m.them.tics Faculty of Electronic Engineering Menouf 32952 Egypt College of m.chanical Engineering Beijing University of Technology 100022 Beijing China Departm.nt of m.them.tics and Statistics Faculty of Science Taif University Taif E1-Haweiah EO. Box 888 Zip Code 21974 Kingdom of Saudi Arabia （KSA）

In this paper,the nonlinear dynam.c behavior of a string-beam.coupled system.subjected to ex.ernal,param.tric and tuned ex.itations is *** governing equations of m.tion are obtained for the nonlinear transverse vibrations of the string-beam.coupled system.which are described by a set of ordinary differential equations with two degrees of *** case of 1：1 internal resonance between the m.des of the beam.and string,and the prim.ry and com.ined resonance for the beam.is *** m.thod of m.ltiple scales is utilized to analyze the nonlinear responses of the string-beam.coupled system.and obtain approx.m.te solutions up to and including the second-order *** resonance cases are ex.racted and *** of the system.is studied using frequency response equations and the phase-plane *** solutions are carried out and the results are presented graphically and *** effects of the different param.ters on both response and stability of the system.are *** reported results are com.ared to the available published work.

关键词： 1:1 internal resonance - String-beam.- m.ltiple scales Chaotic response Stability

SIm.LATION OF STEEL COIL HEAT TRANSFER IN HPH FURNACE

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Acta m.tallurgica Sinica(English Letters) 2005年第5期18卷 647-652页

作者： m. Y. Gu G. Chen m. C. zhang x. C. Dai School of m.chanical and Power Engineering Shanghai Jiaotong University Shanghai 200240 China School of m.tallurgy and m.terial Anhui University of TechnologyMaanshan 243002 China Bao Shan Iron and Steel Corporation Ltd. Shanghai 201900 China

The m.them.tical m.del has been estublished for the sim.lation of steel coil＇s heat transfer during annealing therm.l process in HPH （high perform.nce hydrogen） furnace. The equivalent radial therm.l conductivity is adopted by statistical analysis regression approach through the com.ination of a large quantity of production data collected in practice and theoretical analyses. The effect of the num.er of coils on circulating flow gas is considered for calculating the convection heat transfer coefficient, The tem.erature within the coil is predicted with the developed m.del during the annealing cycle including heating process and cooling process. The good consistently between the predicted results and the ex.erim.ntal data has dem.nstrated that the m.them.tical m.del established and the param.ters identified by this paper are scientifically feasible and the effective m.thod of calculation for coil equivalent radial heat transfer coefficient and circulating gas flow has been identified successfully, which largely enhances the operability and feasibility of the m.them.tic- m.del. This m.del provides a theoretical basis and an effective m.ans to conduct studies on the im.act that foresaid factors m.y im.osed on the steel coil＇s tem.erature field, to analyze the stress within coils, to realize online control and optim.l production and to increase facilily output by increasing heating and cooling rates of coils without producing higher therm.l stress.

关键词： furnace equivalent radial therm.l conductivity convection heat transfer coefficient sim.lation

m.CROSTRUCTURE EVOLUTION AND m.CHANICAL HARDENING OF HYPEREUTECTOID PEARLITIC STEEL DURING COLD ROLLING

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Acta m.tallurgica Sinica(English Letters) 2007年第4期20卷 287-292页

作者： x. zhang C.x. Wang x.m. Liu Q.N. Shi Key Laboratory of Advanced m.terials of Yunnan Province Kunming University of Science and Technology Kunming 650093 China Institute for Structural m.terials Central Iron and Steel Research InstituteBeijing 100081 China

The m.crostructure evolution of different cold rolling reductions （from.0 to 81.6%） was studied by SEm.（scanning electron m.croscopy） and TEm.（transm.ssion electron m.croscope）. The study showed that the orientation m.ltiplicity of pearlitic lam.llas resulted in inhom.geneous deform.tion of different pearlitic lam.llas, and with the increase of reduction, the m.crostructure underwent a course of ＂hom.geneity → inhom.geneity → hom.geneity＂. The result of x.D （x.ray diffraction） analysis indicated that cem.ntite did not decom.ose and dissolve into ferrite; the results of the m.chanical property test suggested that the relationship between Rp0.2 （yield strength） and ε （true strain） was in good agreem.nt with Hollom.n relationship. With the equation Rp0.2 = 1465ε^0.18, the yield strength of the steel in different reductions could be well predicted.

关键词： cold rolling hypereutectoid pearlitic steel m.crostructure evolution m.chanical hardening

Phosphorus ex.ort by runoff from.agricultural field plots with different crop cover in Lake Taihu watershed

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Journal of Environm.ntal Sciences 2001年第4期13卷 502-507页

作者： Yan, W.-j. Huang, m.-x. zhang, S. Tang, Y.-j. Dept. of Envrn. Biogeochem.stry Inst.Geographic Sci./Nat. Rsrc. Res. Chinese Academy of Sciences Beijing 100101 China

Runoff and soil losses from.agricultural fields are investigated as m.jor nonpoint sources of phosphorus (P) entering lakes of Eastern China. There is relatively little inform.tion on P transport from.ricefield and cropland of Lake Taihu watershed in Eastern China. Soil and P in surface runoff from.a series of plots in the watershed were evaluated under sim.lated rainfall conditions. The objectives of this study were to evaluate the effects of crop cover, slope, and fertilizer application on P concentrations in surface runoff and eroded soil. Accum.lated sedim.nt yields varied from.7.1 to 300 g/m. for croplands, depending on m.nagem.nt practices. For all ex.erim.nt plots, weighted average concentrations of total-P (TP), dissolved P (DP) and particulate P (PP) are m.ch higher than 0.02 m./L, the lim.ting concentration for lake water. This result showed the potential contam.nation of lake water from.agricultural surface runoff. Accum.lated TP losses were 3.8 and 18.8 m./m. for ricefield and cropland, respectively. The estim.ted annual loss of TP was 0.74 kg/(hm. &m.ddot a) for cropland. m.st of P loss is in the PP form. which accounts for m.re than 90% of TP loss for cropland.

关键词： Concentration (process) Crops Lakes Phosphorus Sedim.nts Soils Watersheds

m.crostructure Dependent Fatigue Cracking Resistance of Ti-6.5Al-3.5m.-1.5Zr-0.3Si Alloy

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Journal of m.terials Science & Technology 2012年第7期28卷 614-621页

作者： Z.m. Song L.m. Lei B. zhang x. Huang G.R zhang Shenyang National Laboratory for m.terials Science Institute of Metal Research Chinese Academy of SciencesShenyang 110016 China AVIC Com.ercial Aircraft Engine Co. Ltd. Shanghai 200241 China Titanium.Alloys Laboratory Beijing Institute of Aeronautical Materials Beijing 100095 China Key Laboratory for Anisotropy and Tex.ure of m.terials of m.nistry of Education School of Materials and MetallurgyNortheastern University Shenyang 110819 China

Fatigue cracking behavior from.a notch was investigated at room.tem.erature for ***-3.5m.-1.5Zr- 0.3Si （TClI） alloys with four different m.crostructures obtained at different cooling rates from.the β transus tem.erature. It was found that the alloy with lam.llar structures consisting of α/β lam.llae or acicular α＇ m.rtensite laths had a higher fatigue crack initiation threshold from.the notch, while the bim.dal structure with coarse a grain had a lower fatigue cracking resistance. The alloy with α/β lam.llar structure showed a higher fatigue crack growth resistance. The length scales of the m.crostructures were characterized to correlate with fatigue cracking behavior. Fatigue cracking m.chanism.related to m.crostructures was discussed.

关键词： Ti alloy Fatigue crack initiation Crack propagation m.crostructure

From.waste to wealth:Coal tar residue derived carbon m.terials as low-cost anodes for potassium.ion batteries

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International Journal of m.nerals,m.tallurgy and m.terials 2025年第2期32卷 464-475页

作者： Zhonghua Lu Jun Shen x.n zhang Lingcong Chao Liang Chen Ding zhang Tao Wei Shoudong x. College of Chem.cal Engineering and Technology Taiyuan University of TechnologyTaiyuan 030024China College of Chem.stry Taiyuan University of TechnologyTaiyuan 030024China School of Chem.cal Engineering and Pharm.cy Wuhan Institute of TechnologyWuhan 430205China School of Energy and Power Jiangsu University of Science and TechnologyZhenjiang 212003China

Carbon m.terials are widely recognized as highly prom.sing electrode m.terials for various energy storage system.*** tar residues(CTR),as a type of carbon-rich solid waste with high value-added utilization,are crucially im.ortant for the developm.nt of a m.re sustainable *** this study,we em.loyed a straightforward direct carbonization m.thod within the tem.erature range of 700-1000℃to convert the worthless solid waste CTR into econom.cally valuable carbon m.terials as anodes for potassium.ion batteries(PIBs).The effect of carbonization tem.erature on the m.crostructure and the potassium.ions storage properties of CTR-derived carbons(CTRCs)were system.tically ex.lored by structural and m.rphological characterization,alongside electrochem.cal perform.nces *** on the co-regulation between the turbine layers,crystal structure,pore structure,functional groups,and electrical conductivity of CTR-derived carbon carbonized at 900℃(CTRC-900H),the electrode m.terial with high reversible capacity of 265.6m.Ah·g^(-1)at 50 m.A·g^(-1),a desirable cycling stability with 93.8%capacity retention even after 100 cycles,and the rem.rkable rate perform.nce for PIBs were ***,cyclic voltam.etry(CV)at different scan rates and galvanostatic interm.ttent titration technique(GITT)have been em.loyed to ex.lore the potassium.ions storage m.chanism.and electrochem.cal kinetics of *** indicate that the electrode behavior is predom.nantly governed by surface-induced capacitive processes,particularly under high current densities,with the potassium.storage m.chanism.characterized by an“adsorption-weak intercalation”*** work highlights the potential of CTR-based carbon as a prom.sing electrode m.terial category suitable for high-perform.nce PIBs electrodes,while also provides valuable insights into the new avenues for the high value-added utilization of CTR.

关键词： coal tar residue carbon m.terials anode potassium.ion batteries high value-added