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Development of mathematical model with a genetic algorithm for automatic arc welding process

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Acta Metallurgica Sinica(English Letters) 2010年第3期23卷 230-240页

作者： D.T.Thao I.S.Kim j.W.jeong j.h.lee j.Y.Shim h.h.Kim Department of Mechanical Engineering Mokpo National University

This paper is to represent new algorithms to predict process parameters on top-bead width in robotic gas metal arc（GMA） welding *** models have been developed：linear, curvilinear and intelligent model based on full factorial design with two *** analysis was employed for optimization of the coefficients of linear and curvilinear models, while genetic algorithm（GA） was utilized to estimate the coefficients of an intelligent *** only the fitting of these models were checked and compared by using a variance test（ANOVA）, but also the prediction on top-bead width using the developed models were carried out based on the additional *** developed models were employed to investigate the characteristic between process parameters and top-bead *** solutions and graphical representation showed that the intelligent model developed can be employed for prediction of bead geometry in GMA welding process.

关键词： Top-bead width Genetic algorithm Multiple regression Robotic arc welding GMA welding

EFFECT OF CARBON AND BORON ON MICROSTRUCTURE AND MEChANICAL PROPERTIES OF A SINGLE CRYSTAL SUPERALLOY RR 2072

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Acta Metallurgica Sinica(English Letters) 2005年第1期18卷 33-38页

作者： D.h.Kim D.h.Ye j.h.lee Y.S.Yoo C.Y.jo high Temperature Materials Laboratory Korea Institute of Machinery&Materials 66 SangnamChangwonKyungnam 640-010S.Korea Dept.of Metallurgy Changwon National Univerisity 9 SarimChagwonKyungnam 640-773S.Korea

Carbon and boron have been considered to strengthen grain boundaries that might form during single crystal *** this study the effect of boron on solidification behavior and creep properties of the carbon doped single crystal RR 2072 has been *** order to understand solidification behavior with boron addition,the solid/liquid interface morphology and solidification microstructure were examined with solidification *** relationship between mi-crostructural evolution and creep properties of the carbon and boron modified single crystal has been also investigated.

关键词： single crystal superalloy defect tolerance directional solidification creep rupture

Microstructural Evolution in Directionally Solidified Ni-Base Superalloy IN792+hf

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journal of Materials Science & Technology 2008年第1期24卷 110-114页

作者： S.M.Seo I.S.Kim j.h.lee C.Y.jo h.Miyahara K.Ogi high Temperature Materials Research Group KIMS Changwon641-010Korea Dept.of Metall.& Mater.Eng. Changwon Univ. Changwon641-773Korea Dept.of Mater.Sci.& Eng. Kyushu Univ. Fukuoka819-0395Japan Oita National College of Technology Oita 870-0152Japan

Microstructural evolution during directional solidification （DS） of Ni-base superalloy IN792＋hf has been investigated with an emphasis on theγ′precipitates and MC-type *** quantitative image analyses revealed that the increase in the solidification rate up to 100μm/s at constant thermal gradient of 178 K/cm resulted in a fine and uniform distribution ofγ′*** relationship between the as-castγ′size and cooling rate was also determined for DS IN792＋*** the mean time,the MC carbide size was found to be dependent both on the solidification rate and the S/L interface morphology while the area fraction of MC carbide was significantly influenced by the S/L interface morphology.

关键词： IN792 MC corbide Gamma prime Solidification rate

采用Ag-Cu-Zn-Cd焊料焊接烧结刀头与低碳钢的焊接特性

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金刚石与磨料磨具工程 2001年第3期21卷 30-33,36页

作者： j.h.lee C.h.lee 郑鲁勋姜荣超韩国汉阳大学钢铁加工与应用研究院冶金工程部韩国迪爱克斯公司长沙矿院

该项研究中采用三种不同焊料 (W 4 0 ,BAg - 1,BAg3S)对低碳钢锯片基体和青铜基烧结刀头进行焊接。使用DIEXCorp(迪爱克斯公司 )SAB7型高频感应焊接机进行焊接实验。利用OLM(金相分析 ) ,SEM(扫描电子显微镜 ) ,EDS(能谱分析 )和XRD(X... 详细信息

该项研究中采用三种不同焊料 (W 4 0 ,BAg - 1,BAg3S)对低碳钢锯片基体和青铜基烧结刀头进行焊接。使用DIEXCorp(迪爱克斯公司 )SAB7型高频感应焊接机进行焊接实验。利用OLM(金相分析 ) ,SEM(扫描电子显微镜 ) ,EDS(能谱分析 )和XRD(X射线衍射分析 )等手段对不同焊接温度与时间条件下焊接区的焊缝宽度、气孔率和显微结构进行了评价。为了评价焊接强度 ,还进行了抗弯强度 (扭矩 )测试。焊接温度对焊缝强度有较大影响。对于青铜基刀头和锯片钢基体的匹配焊接 ,其合理的焊接温度为 70 0～ 850℃。焊接区的反应程度 ,气孔含量和焊缝宽度三个因素影响焊接强度。在青铜基刀头靠近接面处形成反应区 ,由于在该区形成富Cu相 ,Cu5.6Sn ,CuZn4 ,β(CuZn)和CdAg相 ,而对焊接强度产生有害影响。当焊接温度提高 ,焊接时间增加 ,则气孔率将增大。当焊缝区气孔率小于 3～ 5%时 ,则青铜基刀头将获得最佳强度。焊缝宽度大于 30

关键词：金刚石锯片低碳钢烧法刀头焊接银基焊料

定量CT深度学习评估进行性肺间质纤维化病变的价值

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国际医学放射学杂志 2024年第5期 619-619页

作者： S.Y.Koh j.h.lee h.Park j.M.Goo 许振华苗彦

目的旨在探讨基于深度学习的间质性肺病（ILD）CT定量变化与用力肺活量（FVC）变化和ILD进展视觉评估间的关系，并评价其预后价值。方法纳入2015年1月—

关键词：

Genome of a thermophilic bacterium Geobacillus sp. TFV3 from Deception Island, Antarctica

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Advances in Polar Science 2020年第2期31卷 146-152页

作者： Xin jie ChING Chui Peng TEOh Dexter j.h.lee Marcelo GONZáLEZ-ARAVENA Nazalan NAjIMUDIN Yoke Kqueen ChEAh Paris LAVIN Clemente Michael Vui Ling WONG Biotechnology Research Institute Universiti Malaysia SabahJalan UMS88400 Kota KinabaluSabahMalaysia Instituto Antártico Chileno Plaza Munoz Gamero 1055Punta ArenasChile School of Biological Science Universiti Sains MalaysiaPersiaran Bukit Jambul 11900 Bayan LepasPenangMalaysia Department of Biomedical Science Faculty of Medicine and Health SciencesUniversiti Putra Malaysia43400 UPM SerdangSelangor Darul EhsanMalaysia Universidad de Antofagasta Facultad de Ciencias del Mary Recursos BiologicosDepartamento de BiotecnologiaLaboratorio de Complejidad Microbianay Ecología FuncionalInstituto AntofagastaChile National Antarctic Research Centre University of Malaya50603 Kuala LumpurMalaysia

Thermophilic microorganisms have always been an important part of the ecosystem,particularly in a hot environment,as they play a key role in nutrient recycling at high temperatures where most microorganisms cannot *** most of the thermophiles are archaea,thermophiles can also be found among some species of *** bacteria are very useful in the fundamental study of heat adaptation,and they are also important as potential sources of thermostable enzymes and ***,we have isolated a Gram-positive thermophilic bacterium,Geobacillus ***3 from a volcanic soil sample from Deception Island,*** project was undertaken to analyze the genes of this thermophilic Antarctic bacterium and to determine the presence of thermal-stress adaptation proteins in its *** genome of Geobacillus ***3 was first purified,sequenced,assembled,and *** complete genome was found to harbor genes encoding for useful thermal-stress adaptation *** majority of these proteins were categorized under the family of molecular chaperone and heat shock *** genomic information could eventually provide insights on how the bacterium adapts itself towards high growth temperatures.

关键词： temperature 16SrDNA genomes Geobacillus Deception Island

光声成像对索拉非尼治疗肝癌效果的无创性检测

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国际医学放射学杂志 2018年第2期 240-241页

作者： S.lee j.h.Kim j.h.lee j.h.lee j.K.han 宋筱蕾 Department of Radiology Seoul National University Hospital

摘要目的运用光声成像（PI）评估索拉非尼治疗鼠肝细胞癌（hCC）过程中组织氧饱和度（s O;）的变化。方法将hep G2-RFP hCC荷瘤鼠随机分为索拉非尼治疗组（n=21）和

关键词：索拉非尼光声成像无创性

Experimental Status of the hANBIT Facility

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Plasma Science and Technology 2004年第4期6卷 2367-2370页

作者： S.j.Yoo M.Kwon j.G.Bak K.Choh I.S.Choi j.h.Choi j.W.Choi A.C.England j.hong h.S.jeon h.G.jhang j.S.ju M.jung j.Y.Kim S.S.Kim W.h.Ko K.Y.Kwak M.C.Kyum B.j.lee D.K.lee j.h.lee h.G.lee S.G.lee T.Lho h.K.Na B.h.Park M.K.Park D.C.Seo S.h.Seo j.h.Yeom j.S.Yoon K.I.You Korea Basic Science Institute Daejeon305-333Korea hanbit User Group

hANBIT is a magnetic mirror confinement device. Recent physics experimentshave been mainly focused on identifying discharge characteristics and on getting stable plasmaproduction and operation modes, by using a 500 kW slot antenna system at a fixed RF frequency of 3.5Mhz and varying discharge conditions such as fueling rate, RF power, and B-field intensity incentral cell. Two distinct operation modes are found to be very sensitive to the RF power as well asthe ratio of the RF frequency to the ion cyclotron frequency. A MhD interchange mode of m = - 1 isclearly observed and the stabilizing mechanism can be explained by the sideband coupling theory.

关键词： mirror discharge stabilization

Study of Proton Resonances in ^(22)Mg by Resonant Elastic Scattering of ^(21)Na+p and Its Astrophysical Implication in ^(18)Ne(α,p) ^(21)Na Reaction Rate

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原子核物理评论 2009年第S1期26卷 153-157页

作者： S.Kubono T.Teranishi M.Notani h.Baba S.Nishimura j.Y.Moon M.Nishimura S.Michimasa h.Iwasaki Y.Yanagisawa N.hokoiwa M.Kibe j.h.lee S.Kato Y.Gono C.S.lee Center for Nuclear Study University of Tokyo(CNS) Department of Physics Kyushu University RIKEN(The Institute of Physical and Chemical Research) Department of Physics Chung-Ang University Department of Physics Yamagata University

Proton resonant states in 22Mg have been investigated by the resonant elastic scattering of 21Na+p. The 21Na beam with a mean energy of 4.00 MeV/u was separated by the CNS radioactive ion beam separator(CRIB) and bombarded a thick(Ch2)n target. The energy spectra of recoiled protons were measured at scattering angles of θcm ≈172° and 146°,respectively. A new state at 7.06 MeV has been observed clearly and another new one at 7.28 MeV is tentatively identified due to its low statistics. The proton resonant parameters were deduced from an R-matrix analysis of the differential cross section data. The astrophysical resonant reaction rate for the 18Ne(α,p)21Na reaction has been estimated,and it is about five times larger than that assumed before.

关键词： nuclear astrophysics reaction rate nuclear structure and property