| 多分散性动态光散射数据反演研究 |
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| 引用本文： | 李绍新,王永东.多分散性动态光散射数据反演研究[J].激光生物学报,2009,18(1). |
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| 作者姓名： | 李绍新 王永东 |
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| 作者单位： | 1. 广东医学院物理教研室,广东,东莞,523808
2. 东莞理工学院化学生物工程系,广东,东莞,523106 |
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| 摘 要： | 动态光散射数据反演属于第一类Fredholm积分方程的求解,存在着极大的困难.利用最小二乘法和奇异值分解法对不同分布的多分散性动态光散射模拟数据进行了反演计算.数值测试的结果表明,非负最小二乘法对分布形式较为敏感,奇异值分解法能反演双峰的分布,对窄峰的反演不及非负最小二乘法.
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| 关 键 词： | 动态光散射 多分散性 最小二乘法 奇异值分解 |
Inversion Particle Size Distributions from Dynamic Light Scattering Data with Polydispersity |
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| LI Shao-xin,WANG Yong-dong.Inversion Particle Size Distributions from Dynamic Light Scattering Data with Polydispersity[J].ACTA Laser Biology Sinica,2009,18(1). |
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| Authors: | LI Shao-xin WANG Yong-dong |
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| Institution: | 1.Physical Staff Room;Guangdong Medical College;Dongguan 523808;Guangdong;China;2.Dongguan University of Technology;Dongguan 523106;China |
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| Abstract: | The inversion of dynamic light scattering(DLS) data is a matter of the first kind Fredholm integral equations.This work deals with nonnegative least squares(NNLS) and singular value decomposition(SVD) methods to invert several kinds of particle size distributions from DLS simulation data with ploydispersity.Numerical test results show that NNLS is susceptible to the shape of distributions,and SVD can invert biomodal distribution,but SVD is no better than NNLS to invert narrow distribution. |
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| Keywords: | dynamic light scattering polydispersity nonnegative least squares singular value decomposition |
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