| 基于分布宽度选取收敛阈值求解粒子尺度分布 |
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| 引用本文： | 葛宝臻,魏永杰,吕且妮,汤海军.基于分布宽度选取收敛阈值求解粒子尺度分布[J].光电子．激光,2007,18(11):1329-1332. |
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| 作者姓名： | 葛宝臻 魏永杰 吕且妮 汤海军 |
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| 作者单位： | 天津大学精密仪器与光电子工程学院,光电信息技术科学教育部重点实验室,天津,300072 |
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| 摘 要： | 在激光粒度测量中,采用改进的共轭梯度法(ICGA)能够求解单峰或多峰的粒度分布,但是为了对宽度不同的粒度分布均获得较好的效果,仍需要选取不同的迭代参数值.针对以上问题,提出通过改变收敛阈值来控制迭代过程,使该算法可满足窄、宽和多峰分布的粒度求解要求.模拟计算和实测结果表明,这种方法可以提高准确度和分辨率,增强抗噪声能力.
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| 关 键 词： | 激光粒度测量 粒度分布 改进的共轭梯度法(ICGA) 分布宽度 收敛阈值 |
| 文章编号： | 1005-0086（2007）11-1329-04 |
| 修稿时间： | 2006-12-17 |
Study of Invert Particle Size Distribution by Choosing Convergence Threshold Based on Distribution Width |
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| GE Bao-zhen,WEI Yong-jie,L.Study of Invert Particle Size Distribution by Choosing Convergence Threshold Based on Distribution Width[J].Journal of Optoelectronics·laser,2007,18(11):1329-1332. |
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| Authors: | GE Bao-zhen WEI Yong-jie L |
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| Affiliation: | Key Laboratory of Opto-electronics Information Science and Technology,Ministry of Education; School of Precision Instruments and Opto-Electronics Engineering,Tianjin University,Tianjin 300072 ,China |
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| Abstract: | In order to select adequate iteration parameter values to solve particle size distribution with different width,it is proposed to control the iteration process by altering the convergence threshold.Accordingly,the improved conjugate gradient algorithm(ICGA) can be used to invert narrowly distributed,widely distributed and multi-modal PSD in practice.Simulated and experimental results show that the proposed method can improve the accuracy and resolution as well as the capability of noise resistance. |
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| Keywords: | laser particle size measurement particle size distribution improved conjugate gradient algorithm(ICGA) distribution width convergence threshold |
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