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10篇 您的检索式:作者名="C.H.Lee"
    题名 作者 年代 出处 被引量
1胃恶性与良性溃疡CT仿真胃镜与光学胃镜鉴别诊断的对照研究显示文摘目的 回顾性对照CT仿真胃镜(VG)与常规光学胃内镜对恶性与良性胃溃疡的鉴别。材料与方法本研究由学术委员会批准,不需要知情同意通知。评价115例胃溃疡病人(年龄31~86岁,平均64.7岁;男61例,女54例)病变的内镜与VG表现。由2名独立的观察者评价溃疡的外形、基底与边缘及溃疡周围的皱襞。C.H.Lee T.J.Hsieh C.M.Jan T.S.Jaw 唐光健 2009国际医学放射学杂志2009,32,5:16
2Temperature and Thermal Stress Distribution for Metal Mold in Squeeze Casting Process显示文摘在扔进程的 squeeze,装载了高压力(在约 100 MPa 上) 并且使用的金属的 thermo 机械的行为和性能塑造的高温度影响。因此,塑造安全地维持金属,在扔的 squeeze 的金属模子的 thermo 机械的特征(温度和热应力) 必须被调查。在这篇论文,温度和钢的热压力分发塑造在压榨扔进程被就温度依赖者而言使用三维的非稳定的热传导分析和三维的热有弹性塑料的分析调查钢模子的 thermo 物理、机械的性质。C.H.Lee S.H.Lee 2008Journal of Materials Science & Technology2008,24,3:2
3采用Ag-Cu-Zn-Cd焊料焊接烧结刀头与低碳钢的焊接特性显示文摘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 30J.H.Lee C.H.Lee 郑鲁勋 姜荣超 2001金刚石与磨料磨具工程2001,21,3:2
4Synthesis of Fluorescent Metallic Nanoclusters toward Biomedical Application:Recent Progress and Present Challenges显示文摘C.A.J.Lin C.H.Lee J.T.Hsieh 0,,29:1
5Synthesis,characterization,and bioconjugation of fluorescent gold nanoclusters toward biological labeling applications显示文摘C.A.J.Lin T.Y.Yang C.H.Lee 0,,03:1
6Enhanced sludge dewatering by dual polyelectrolytes conditioning显示文摘C.H.Lee M J. C.Liu 0,,18:1
7Synthesis of Fluorescent Metallic Nanoclusters toward Biomedical Application:Recent Progress and Present Challenges显示文摘C.A.J.Lin C.H.Lee J.T.Hsieh 0,,29:1
8Synthesis,characterization,and bioconjugation of fluorescent gold nanoclusters toward biological labeling applications显示文摘C.A.J.Lin T.Y.Yang C.H.Lee 0,,03:1
9Comparing the Effectiveness of Coatings on Carbide andCermet Cutting Tool Inserts显示文摘A series of metal cutting experiments was performed on a CNC lathe to evaluate the performance of various coatings on different tool substrates. The workpiece material was plain medium carbon steel and the cutting tool materials were carbide and cermet inserts coated with various single as well as multilayer coatings. Machining was done under various cutting conditions of speed and feed-rate, and for various durations of Cutting. The output parameters studied were the cutting forces (axial, radial and tangential), the surface roughness of the workpiece, as well as the tool wear (crater and flank wear). From these results, the performances of the various cutting inserts are evaluated and compared. Results show that cutting forces are significantly lower when using coated cermets than when using coated carbides although different coatings on the same substrate also result in different cutting forces. However, there is less difference in the surface roughness of the finished workpiece for the various coatings and substrates.K.H. W.Seah M.Rahman and C.H.Lee (Dept. of Mech. & Prod. Eng., National University of Singapore, 10 Kent Ridge Crescent, Singapore 0511 T.N.Goh (Dept. of Ind. & Sys. Eng., National University of Singapore, 10 Kent Ridge Crescent, Singapore 0511) 1995Journal of Materials Science & Technology1995,11,4:0
10主轴支承系统的计算——用结构变型法求静态和动态特性显示文摘本文论述了采用结构变型法对主轴支承系统进行静、动态计算的过程及特点,与用有限元法进行计算作了分析对比。在一定范围内,结构变形法计算结果与有限元法计算结果及实测结果极为近似,而结构变型法简单,计算速度快。图4幅。G.Spur A.Kirchheim C.H.Lee 贾镜如 1990组合机床与自动化加工技术1990,,11:0
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