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and Vita Toothguide 3D-MASTER tooth shade guide. In instrumental analysis, one prosthodontist examined the same teeth using a spectrophotometer (ShadepilotTM, Degudent, Hanau-Wolfgang, Germany, software 2.40). Overall, instrumental analysis is more accurate and reproducible than a visual assessment. However, the difference is clinically acceptable.关键词:......
. Recursive estimation and time-series analysis: An introduction for the student and practitioner [M]. Berlin: Springer-Verlag, 2011. [21] YOUNG P C, GARNIER H, GILSON M. Refined instrumental variable... and time delay are alternately fixed to estimate each other. The instrumental variable technique is applied to guarantee consistent estimation against measurement noise. A noteworthy merit......
痕量锗的分析进展李丹1,李彪1(1.湖北省武汉市湖北省地质实验研究所)摘 要:锗是一种贵重的稀散金属元素,广泛应用于当代高新科技行业.本文综述了近年来分析样品中痕量锗的试样前处理方法及仪器分析进展.介绍了电热板溶解,微波消解和密闭罐消解前处理样品对测定痕量锗的影响.总结了近年来痕量锗的仪器分析方法包括电感耦合等离子体发射光谱法,原子吸收光谱法,原子荧光光谱法,电感耦合等离子体质谱法,光度法,电化学法和离子色谱法等.指出了不同方法的特点及使用范围,并展望了痕量锗的前处理及其分析方法的发展方向.关键词......
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X-ray diffraction analysis of cold-worked Cu-Ni-Si and Cu-Ni-Si-Cr alloys by Rietveld method A. KHEREDDINE, F. HADJ LARBI, L. DJEBALA, H. AZZEDDINE, B. ALILI, D. BRADAI Faculté de Physique, USTHB... studied. The microstructural parameters evolution, including crystallite size, root mean square strain and dislocation density was analyzed using Materials Analysis Using Diffraction software (MAUD......
Effect of heat treatment on the Nb distribution and corrosion resistance of Zr-Sn-Nb-Fe zirconium alloyLIU Wenqing GENG Xun LIU Qingdong LI Qiang ZHOU Bangxin YAO Meiyi Instrumental Analysis & Research Center,Shanghai University,Shanghai 200444,China摘 要:<正>After being treated in different ways,Zr-Sn-Nb-Fe alloy specimens are exposed......
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for speed consistency, few researches consider both in practice. The factor analysis method was introduced to extract an optimal number of factors from numerous original measures. The freeway diverging... with radar guns. Following the factor analysis procedure, two factors, which explain 96.722% of the variance in the original data, were retained from the initial seven speed measures. According......
Characterization and analysis of non-metallic inclusions in Ni42–Fe expansive alloy SHEN Jie(沈 婕)1,2, XIA Tian-dong(夏天东)1,3, WANG Xiao-jun(王晓军)1,3, FENG Xiao-chun(冯晓春)1 1. Key... that leads to the surface cracks and ruptures in the alloy wires. The analysis has educed that the key point to enhance the product quality is to promote the cleanliness of the melt, control the types......
Thermodynamic analysis of separating lead and antimony in chloride system CHEN Jin-zhong(陈进中)1, CAO Hua-zhen(曹华珍)2, LI Bo(李 波)2, YUAN Hai-jun(袁海军)2, ZHENG Guo-qu(郑国渠)2, YANG Tian-zu(杨天足)1 1...; Abstract: In chloride system, thermodynamic analysis is a useful guide to separate lead and antimony as well as to understand the separation mechanism......
