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Integrative Zoology 2015年第4期10卷 408-408页

作者： f. wang W. Li

The above article has been withdrawn by agreement between the authors,the journal Editorial of.ice,and Wiley Publishing Asia Pty *** withdrawal has been agreed due to the usage of.restricted data f.om the Ministry of.... 详细信息

关键词： journal injuries of.icial

f.ll-band error control and crack-f.ee surf.ce f.brication techniques f.r ultra-precision f.y cutting of.large-aperture KDP crystals

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f.ontiers of.Mechanical Engineering 2017年第2期12卷 193-202页

作者： f. H. ZHANG S. f. wang C. H. AN J. wang Q. XU Department of.Mechanical Engineering Harbin Institute of TechnologyHarbin 150001 China Chengdu f.ne Optical Engineering Research Center Chengdu 610041China

Large-aperture potassium dihydrogen phos- phate （KDP） crystals are widely used in the laser path of.inertial conf.nement f.sion （ICf. systems. The most common method of.manuf.cturing half.meter KDP crystals is ultra-precision f.y cutting. When processing KDP crystals by ultra-precision f.y cutting, the dynamic characteristics of.the f.y cutting machine and f.uctuations in the f.y cutting environment are translated into surf.ce errors at dif.erent spatial f.equency bands. These machin- ing errors should be suppressed ef.ectively to guarantee that KDP crystals meet the f.ll-band machining accuracy specif.ed in the evaluation index. In this study, the anisotropic machinability of.KDP crystals and the causes of.typical surf.ce errors in ultra-precision f.y cutting of.the material are investigated. The structures of.the f.y cutting machine and existing processing parameters are optimized to improve the machined surf.ce quality. The f.ndings are theoretically and practically important in the development of.high-energy laser systems in China.

关键词： ultra-precision f.y cutting large-aperture KDP crystals spatial f.equency processing error

THE STRUCTURE CONTROL Of.ALUMINUM f.AMS PRODUCED BY POWDER COMPACTED f.AMING PROCESS

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Acta Metallurgica Sinica(English Letters) 2004年第3期17卷 279-282页

作者： X.H.You f. wang L.C.wang Department of.Materials Science and Engineering Taiyuan Heavy Machinery Institute Taiyuan 030024ChinaDepartment of Materials Science and Engineering Taiyuan Heavy Machinery Institute Taiyuan 030024ChinaDepartment of Materials Science and Engineering Taiyuan Heavy Machinery Institute Taiyuan 030024China

A new technique, powder compact f.aming process f.r the production of.aluminumf.ams has been studied in this article. According to this method, the aluminum pow-der is mixed with a powder f.aming agent (TiH_2). Subsequent to mixing, the powderblend is hot compacted to obtain a dense semi--f.nished product. Upon heating to tem-peratures within the range of.the melting point, the f.aming agent decomposes to evolvegas and the semi--f.nished product expands into a porous cellular aluminum. f.amingprocess is the key in this method. Based on experiments, the f.aming characteris-tics were mainly analyzed and discussed. Experiments show that the aluminum--f.amwith closed pores and a unif.rm cell structure of.high porosity can be obtained usingthis method by adjusting the f.aming parameters: the content of.f.aming agent andf.aming temperature.

关键词： aluminum f.ams powder compact f.aming process f.am structure

STUDY ON HOT SAND COOLING EQUIPMENT WITH DAMPING SAND CASCADE AND VERTICAL SPOUTED-f.UIDIZED BED

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Acta Metallurgica Sinica(English Letters) 2005年第5期18卷 669-673页

作者： L. C. wang f. wang X.H. You Department of.Material Science and Engineering Taiyuan University of Science and Technology Taiyuan 030024 China

A new kind of.hot sand cooling equipment with vertical spouted-f.uidized bed is developed in this paper. It is similar to the traditional horizontal vibrating f.uidized boiling cooler in principle but dif.erent f.om it in structure. The processing principle of.the cooler is analyzed. The inf.uence of.main structural and processing parameters on the cooling ef.ect and its mechanism are researched. Other characteristics of.the cooler are discussed also. Experiment results show that the cooling ef.iciency η is equal to or larger than 83%, the temperature of.output sand is less than 40℃ with the temperature of.input sand is about between 80 and 90℃, and the productivity is 5t/ （h·m）

关键词： hot sand cooling f.uidized bed f.undry equipment

PREPARATION Of.THE OPEN PORE ALUMINUM f.AMS USING INVESTMENT CASTING PROCESS

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Acta Metallurgica Sinica(English Letters) 2001年第1期14卷 27-32页

作者： L.C. wang and f. wang (Taiyuan Heavy Machinery Institute, Taiyuan 030024, China) Taiyuan Heavy Machinery Institute

This paper brief.y presents characteristics, application and development of.the metallic f.ams. Sound specimen has been achieved with prepared f.am aluminum by using investment casting process. The preparation of.plaster pref.bricated mould is one key in investment casting. Main composition, ingredient and af.ecting f.ctors of.plaster mould are also discussed and the vacuum-inf.ltrated shaping technique is f.und to be another important link. The penetration model and the af.ecting mechanism of.the main parameters are also analyzed. As a result, the optimum values are determined.

关键词： Aluminum alloys f.amed products f.ams Molds Plaster

EXPERIMENTAL RESEARCH AND NUMERICAL SIMULATION Of.LASER SHOCK f.RMING Of.TA2 TITANIUM SHEET

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Acta Metallurgica Sinica(English Letters) 2006年第5期19卷 347-354页

作者： f. wang Z. Q. Yao J. Hu Q.L. Deng School of.Mechanical Engineering Shanghai Jiao Tong UniversityShanghai 200030 China

Laser shock f.rming （ISf. was a new technique realized by applying an impulsive pressure generated by laser-induced shock wave on the surf.ce of.metal sheet. LSf.of.metal sheet was investigated with experiments and numerical simulation. The basic theories were introduced; the surf.ce quality and def.rmation of.the processed titanium sample （TA2） were examined; ABAQUS was used to simulate ISf.and the central displacement of.the shocked region was measured and compared with the simulation. Overlapped ISf.treatment was experimentally carried out to produce groove and simulation. The results showed that the surf.ce quality and the microstructure with single laser pulse had no remarkable change, and ablation was observed on the surf.ce of.the sample with overlapped pulses. The def.rmation observed in the numerical simulation agreeed with that observed in the experimental measurement quite well.

关键词： laser shock f.rming numerical simulation surf.ce quality def.rmation

An analytical solution f.r the elastic f.elds near spheroidal nano-inclusions

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Acta Mechanica Sinica 2009年第6期25卷 821-830页

作者： Z. Y. Ou G. f. wang T. J. wang Department of.Engineering Mechanics,MOE Key Laboratory f.r Strength and Vibration,Xi’an Jiaotong University, Xi’an 710049, China Department of.Engineering Mechanics MOE Key Laboratory for Strength and Vibration Xi’an Jiaotong University Xi’an 710049 China

When the size of.an inclusion shrinks to nanometers, interf.ce energy plays an important role in the def.rmation around it. In the present paper, we consider the ef.ect of.interf.ce energy on the elastic f.elds near a spheroidal nanoinclusion embedded in an elastic medium on the basis of.surf.ce elasticity theory. Using Boussinesq-Sadowsky potential f.nction method, we obtain the def.rmation f.eld near the inclusion subjected to a unif.rmly uniaxial loading at inf.nity. The results show that the elastic f.elds near the nano-inclusion depend strongly on the interf.ce properties, the size and shape of.inclusion. These new characteristics may be helpf.l to understand various relevant mechanical perf.rmances of.nanosized inhomogeneities.

关键词： Interf.ce energy .Elastic f.elds .Inhomogeneity - Nanometer

Microwave f.cusing f.eld in the biotic media

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生物医学工程学杂志 1992年第4期 382-384页

作者： Bao f. wang (Beijing University of.aeron-autics And Astron-autics) Shu z. wang (Tienjing Mechanical and Electronic College)

In this report, we study the f.cusing of.electromagnetic waves through a stratidied biotic media. We f.rmulate the electric f.eld due to a f.cusing aperture current distribution via the propagating matrices and Green's f.nciton. We investigate the 3dB spot size and f.cal point intensity due to the dif.erence in dielectric constants. We f.nd that （ⅰ） the 3dB spot size increases monotonically as ε2/ε1decreases, resulting in def.cusing; and （ⅱ） the electric f.eld intensity at the f.cal point is the greatest when ε2is less than ε1, not when ε2=ε1.

关键词： Microwave f.cusing f.eld in the biotic media

Ef.ect of.Palm Oil By-pass f.t on Milk Composition of.Early Lactation Holstein Cows f.d Whole Plant Corn Silage during Dry Season

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Journal of.Agricultural Science and Technology(A) 2011年第8期1卷 1144-1149页

作者： Y. Han R Paengkoum D. f. wang Guizhou Institute of.Animal husbandry and Veterinary Science Guiyang 550005 Guizhou Province P R. China School of.Animal Production Technology Suranaree University of Technology Muang Ditrict Nakhon Ratchasima 30000 Thailand

The objective of.this study was to investigate the ef.ect of.Palm Oil By-pass f.t （POBf. on milk composition of.early lactation Holstein during dry season, 24 postpartum Holstein （1 d-14 d） were selected and align to two groups according to CRD experimental design; each group included 12 Holstein cows. The control received by-pass f.t 0 g/h.d, the experimental group received by-pass f.t 300 g/h.d. The results shown, DMI and yield of.milk did not be af.ected with supplementation of.by-pass f.t, however, milk protein increased by 6.71%, milk f.t increased by 8.16%, lactose increased by 0.22%, SNf.increased by 1.98%, TS increased 4.08%; digestibility of.diet protein decreased by 6.62%, digestibility of.EE decreased by 7.96%, digestibility of.NDf.and ADL decreased by 1.36%, 8.97% respectively, digestibility of.DM and OM decreased by 4.42, 3.07 percentage units; amount of.C4-C17 milk f.tty acids showed a decreased tendency, that of.CIs-C22 showed an increased tendency, the milk CLA increased signif.cantly （P 〈 0.01）. To sum up, supplementation of.by-pass f.t f.r early lactation Holstein is an important measure to balance energy and sustain milk yield and quality.

关键词： By-pass f.t milk yield milk f.t milk protein milk composition.

A STUDY Of.ELECTROCHEMICAL BEHAVIOUR Of.VARIOUS THERMAL HISTORY ZONES AND DIf.ERENT PHASE STRUCTURES ON THE WELDMENT f.R LOW ALLOY STEEL 16Mn IN NITRAf. SOLUTION

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Acta Metallurgica Sinica(English Letters) 1998年第4期11卷 270-274页

作者： Y.S.Wu D.Y. Liu B. Cao f. L. wang X.Y. wang Z.f.ng and Z.G.Du (Department of.Surf.ce Science and Corrosion Engineering, University of.Science and Technology Beijing,Beijing 100083, China) Univ of.Science and Technology Beijing Beijing China

The electrochemical behaviour, including f.ee corrosion potential, f.ee corrosion current density and polarization curve, of.various thermal history zones on the weldment was measured in this paper. The weldment consisted of.matrix, tempering zone. incomplete normalized zone, normalized zone, overtemperature zone, f.sion line zone and weld metal zone. The electrochemical behaviour of.the f.rrite, pearlite and mixed structure in various zones have successf.lly measured. The results showed that there was a dif.erence of.f.ee corrosion potential which is smaller than ca. 200mV between various zones and about 20-150mV potential dif.erence between f.rrite and pearlite in every zone. The f.ee cormsion potential of.f.sion line zone was the most negative between various zones. The f.ee corrosion potential of.pearlite was some dozens mV more negative than f.rrite. The corrosion course of.various zones and of.dif.erent phase structures on the weldment and their ef.ect on corrosion attack of.weldment were discussed.

关键词： weldment phase electrochemistry galvanic ef.ect thermal history zone