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A pre-compensation method of the sy.tematic contouring error for repetitive command paths

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Frontiers of Mechanical Engineering 2015年第4期10卷 367-372页

作者： D. L. ZHANG y. H. chen y. P. chen State Key.Laboratory.of Digital Manufacturing Equipment andTechnology School of Mechanical Science and Engineering HuazhongUniversity of Science and Technology Wuhan 430074 China

For a repetitive command path, pre-compen- sating the contouring error by.modify.ng the command path is practical. To obtain the pre-compensation value with better accuracy. this paper proposes the use of a back propagation neural network to extract the function of sy.tematic contouring errors. Furthermore, by.using the extracted function, the contouring error can be easily.pre- compensated. The experiment results verify.that the proposed compensation method can effectively.reduce contouring errors.

关键词： contouring error pre-compensation motioncontrol sy.tem back propagation (BP) neural network

Several Phase Modulators for Digital Shearography

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Chinese Journal of Lasers 1995年第3期B4卷 263-268页

作者： F. chen, y. y. HUNG(Department of Mechanical Engineering,Oakland University. Rochester Hills,Michigan 48309, USA) Oakland Univ Michigan United States

ＳｅｖｅｒａｌＰｈａｓｅＭｏｄｕｌａｔｏｒｓｆｏｒＤｉｇｉｔａｌＳｈｅａｒｏｇｒａｐｈｙ￥Ｆ．ＣＨＥＮ，Ｙ．Ｙ．ＨＵＮＧ（ＤｅｐａｒｔｍｅｎｔｏｆＭｅｃｈａｎｉｃａｌＥｎｇｉｎｅｅｒｉｎｇ，ＯａｋｌａｎｄＵｎｉｖｅｒ... 详细信息

ＳｅｖｅｒａｌＰｈａｓｅＭｏｄｕｌａｔｏｒｓｆｏｒＤｉｇｉｔａｌＳｈｅａｒｏｇｒａｐｈｙ￥Ｆ．ＣＨＥＮ，Ｙ．Ｙ．ＨＵＮＧ（ＤｅｐａｒｔｍｅｎｔｏｆＭｅｃｈａｎｉｃａｌＥｎｇｉｎｅｅｒｉｎｇ，ＯａｋｌａｎｄＵｎｉｖｅｒｓｉｔｙ，ＲｏｃｈｅｓｔｅｒＨｉｌ...

关键词： digital shearography phase modulator

Effects　of　iron　on　growth,degree　of　pigmentization　and　nitrogen　assimilation　in　Skeletonema　costatum

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Acta Oceanologica Sinica 1998年第2期17卷 187-196页

作者： Zheng A. chen C. Zhou C. chen y. Department of Oceanography Xiamen University Xiamen 361005 China

Ｅｆｆｅｃｔｓｏｆｉｒｏｎｏｎｇｒｏｗｔｈ，ｄｅｇｒｅｅｏｆｐｉｇｍｅｎｔｉｚａｔｉｏｎａｎｄｎｉｔｒｏｇｅｎａｓｓｉｍｉｌａｔｉｏｎｉｎＳｋｅｌｅｔｏｎｅｍａｃｏｓｔａｔｕｍＺｈｅｎｇＡｉｒｏｎｇ，ＣｈｅｎＣｉｍｅ... 详细信息

Ｅｆｆｅｃｔｓｏｆｉｒｏｎｏｎｇｒｏｗｔｈ，ｄｅｇｒｅｅｏｆｐｉｇｍｅｎｔｉｚａｔｉｏｎａｎｄｎｉｔｒｏｇｅｎａｓｓｉｍｉｌａｔｉｏｎｉｎＳｋｅｌｅｔｏｎｅｍａｃｏｓｔａｔｕｍＺｈｅｎｇＡｉｒｏｎｇ，ＣｈｅｎＣｉｍｅｉ，ＺｈｏｕＣｉｙｏｕ，ＣｈｅｎＹ...

关键词： Effects growth,degree Skeletonema and costatum nitrogen pigmentization

Measurement　of　Vibration　Derivative′s　Amplitude　and　Phase　by.Strobe　and　Optical　Phase　Shifting　Shearography

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Chinese Journal of Lasers 1995年第2期B4卷 181-185页

作者： F. chen, y. y. Hung, G. M. Brown(Department of Mechanical Engineering, Oakland University.Rochester Hills, Michigan 48300 USA) Oakland Univ Rochester Hills United States

ＭｅａｓｕｒｅｍｅｎｔｏｆＶｉｂｒａｔｉｏｎＤｅｒｉｖａｔｉｖｅ′ｓＡｍｐｌｉｔｕｄｅａｎｄＰｈａｓｅｂｙＳｔｒｏｂｅａｎｄＯｐｔｉｃａｌＰｈａｓｅＳｈｉｆｔｉｎｇＳｈｅａｒｏｇｒａｐｈｙ￥Ｆ．Ｃｈｅｎ，Ｙ．Ｙ．Ｈｕ... 详细信息

ＭｅａｓｕｒｅｍｅｎｔｏｆＶｉｂｒａｔｉｏｎＤｅｒｉｖａｔｉｖｅ′ｓＡｍｐｌｉｔｕｄｅａｎｄＰｈａｓｅｂｙＳｔｒｏｂｅａｎｄＯｐｔｉｃａｌＰｈａｓｅＳｈｉｆｔｉｎｇＳｈｅａｒｏｇｒａｐｈｙ￥Ｆ．Ｃｈｅｎ，Ｙ．Ｙ．Ｈｕｎｇ，Ｇ．Ｍ．Ｂｒｏｗｎ（Ｄｅｐａ...

关键词： digital shearography vibration measurement

MICROSTRUCTURAL FORMATION MECHANISM OF SEMI-SOLID AZ91D ALLOy

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Acta Metallurgica Sinica(English Letters) 2005年第4期18卷 539-546页

作者： W.M. Mao Z.S. Zhen H. T. chen X. y. Zhong School of Materials Science and Engineering University of Science and Technology Beijing Beijing 100083 China

With the help of an electromagnetic stirring device and alloy.melt quenching technology. the microstntcture of semi-solid AZqlD magnesium alloy.slurry.stirred by.a rotationally.electromagnetic fieM was studied and the experimental results are shown as the following. The primary. α-Mg grains are refined obviously.when the slurry.is stirred by.a rotational electromagnetic field during continuously.cooling and they.are eventually.changed to fine rosette grains or spherical grains. If the above semi-solid slurty.is further stirred isothermally.for some time, much more spherical primary.α-Mg grains can be obtained. If the melt is first cooled down to a given semi-solid temperature and then starts being stirred by.the rotational electromagnetic field, the primary.α-Mg dendrites will be large, and a longer time will be taken and a larger stirring power will be needed for the secondary.army.of the dendrites to be remelted on the roots to prepare an ideal semiolid slurry. Theoretical analy.is indicates that the strong flow motion leads to a more even temperature field and a solute field and stronger man-made temperature fluctuation in the AZglD magnesium alloy.melt so that the spherical primary.α-Mg grains are increased in the slurry. Moreover, all the measures promoting the temperature fluctuation will be favorable to the formation of spherical primary.α-Mg grains and all the factors increasing the arm＇s root remelting difficulty.will be favorable to the formation of rosette-ty.e primary.α-Mg grains.

关键词： AZ91D magnesium alloy.electromagnetic stirring microstructure semi-solid

Linear free energy.relationships between stability.of complex and basicity.of ligand Ⅶ. The copper(Ⅱ)-heteronuclear aromatic base-aminoacid temary.sy.tems

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Chinese Journal of Chemistry 1986年第3期4卷 189-195页

作者： chen Rong-Ti(y. T. chen) LIN Hua-Kuan Department of Chemistry. Nankai University. Tianjin Department of Chemistry Nankai University Tianjin

The formation constants of ternary.mixed ligand complex compounds formed fromCu（Ⅱ）-2,2'-bipy.idy. （bipy. with N-（para-substituted pheny.） gly.ines （pRPhG）, Cu（Ⅱ）-1, 10-phenan-throline （phen） with N-（meta-substituted pheny.） gly.ines （mRPhG）, Cu（Ⅱ）--bipy.phen with someα-aminoacids （αA） have been determined by.pH method at 25℃ in the presence of 0.10 M *** was found that linear free energy.relationships do exist between the stability.of ternary.complexcompounds and the base strengths of the ligands in all four ternary.sy.tems investigated. The stabi-lity.of the ternary.complex compounds was discussed in terms of ΔlogKMand log X values. It wasfound again that linear relationships exist between Δ log KM, log X and p K2in the Cu （Ⅱ）-phen-mRPhGternary.sy.tem.

关键词： heteronuclear aromatic base-aminoacid temary.sy.tems Linear free energy.relationships between stability.of complex and basicity.of ligand The copper free base

Predispersed Solvent Extraction

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Predispersed Solvent Extraction

The Mechanical Properties of V-4Cr-4Ti in Various Thermo-mechanical States

Third Joint China/USA Chemical Engineering Conference

作者： y.-D. Wang y.-y. Huang M. chen and y.-y. Dai Department of Chemical Engineering Tsinghua University.Beijing 100084 P. R. China

＜正＞Predispersed solvent extraction （PDSE） is a new extraction technique in which one of the two phases （usually.the oil phase） is predispersed into minute droplets. The essential part of this novel technique is the use of colloidal liquid aphrons （CLA） together with colloidal gas aphrons （CGA）. The use of colloidal liquid aphrons in predispersed solvent extraction may.ameliorate the problems such as emulsion formation, reduction of interfacial mass transfer and low interfacial mass transfer areas in separating bioproducts by.solvent extraction. The aim of this paper is to review the PDSE process and the potential applications of CLA, CGA and PDSE for the various areas of separation.

关键词： Predispersed solvent extraction colloidal liquid aphrons colloidal gas aphrons

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Southwestern Institute of Physics Annual Report

Southwestern Institute of Phy.ics Annual Report 2006年第1期 150-151页

作者： chen Jiming Muroga T. Nagasaka T. Qiu S. y. Li C. chen y. Liang B. XU Zengy. 不详 National Institute for Fusion Science Oroshi Toki Gifu 509-5292 Japan National Key.Lab. for Nuclear Fuel ＆ Materials P. D. Box 436 Chengdu 610041 China

V-4Cr-4Ti is the leading candidate vanadium alloy.as structural material of a V-Li blanket. Due to the interaction between Ti and interstitial solutes of C, N, and O, precipitation occurs at 600--700℃, increases the alloy.strength significantly.but reduce its ductility. As the ductility.reduction is in an acceptable level, the strengthening might be utilized for the components that are subjected to high stress levels. Although cold work （CW） is known as an effective way.to strengthen an alloy. so far few reports were found on strengthening a vanadium alloy.by.cold rolling.

关键词： V-4Cr-4Ti 机械装置铅合金性能

A Novel Approach for Full-field Measurement of Principal Stress Directions in Photoelasticity

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A Novel Approach for Full-field Measurement of Principal Str...