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曲线光顺性定量分析的光顺因子法 被引量:1
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作者 闫晨 纪小刚 +2 位作者 于益超 张溪溪 胡海涛 《机械科学与技术》 CSCD 北大核心 2019年第5期736-741,共6页
目前产品的光顺效果评定大都基于定性分析。针对现有评定方法主观性强,计算效率低下等缺陷,提出一种定量评定光顺效果的方法。该方法先将曲线平移变换以消除坐标的影响,然后进行小波光顺,基于小波光顺前后曲线的尺度,定义修正系数α,修... 目前产品的光顺效果评定大都基于定性分析。针对现有评定方法主观性强,计算效率低下等缺陷,提出一种定量评定光顺效果的方法。该方法先将曲线平移变换以消除坐标的影响,然后进行小波光顺,基于小波光顺前后曲线的尺度,定义修正系数α,修正小波光顺后的细节部分,由修正后的细节部分和尺度部分构建光顺性定量指标光顺因子λ,通过计算光顺因子λ实现定量评定光顺效果。工程实例表明,提出的定量分析方法可作为光顺效果评定的可靠工具。 展开更多
关键词 光顺 小波光顺 修正系数 光顺因子 定量分析
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Theoretical Studies of Energy Spectra and g Factors of Cr3+-Doped YAl3(BO3)4
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作者 ZHANG Ji-Ping CHEN Gang ZHOU Hua-Bin 《Communications in Theoretical Physics》 SCIE CAS CSCD 2006年第6期1121-1125,共5页
With the strong-field scheme and trigonal bases, by diagonalizing the complete d^3 energy matrix in a trigonally distorted cubic-field, the energy spectra and wavefunctions of YAl3(BO3)4:Cr^3+ have been calculated... With the strong-field scheme and trigonal bases, by diagonalizing the complete d^3 energy matrix in a trigonally distorted cubic-field, the energy spectra and wavefunctions of YAl3(BO3)4:Cr^3+ have been calculated. The rates of change of levels with respect to various parameters and the contributions to levels from various parameters are calculated, and the physical origins of various levels or splittings have been clearly and quantitatively shown. By using the wavefunctions obtained from diagonalizing the complete energy matrix, the g factors of the ground state of YAl3 (BO3 )4;Cr^3+ have been evaluated. The calculated results are in good agreement with the optical-spectral and EPR experimental data. It is demonstrated that the bonding between Cr^3+ and ligands (O^2-) is ionic. 展开更多
关键词 crystal fields energy spectrum g factor electronic paramagnetic resonance
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