计算物理 ›› 2011, Vol. 28 ›› Issue (5): 725-729.

• 研究论文 • 上一篇    下一篇

ART算法中射线矩阵加权的BPT算法

许令周, 范宜仁, 夏卫芳   

  1. 中国石油大学, 山东 东营 257061
  • 收稿日期:2010-10-29 修回日期:2011-04-25 出版日期:2011-09-25 发布日期:2011-09-25
  • 作者简介:许令周(1972-),男,山东泰安,副教授,博士生,从事地球物理成像研究,山东东营中国石油大学物理科学与技术学院257061,E-mail:xuLz69@163.com
  • 基金资助:
    中央高校基本科研业务费专项资金(09CX04066A)资助项目

BPT Algorithm for Weighting Ray Matrix in ART Algorithm

XU Lingzhou, FAN Yiren, XIA Weifang   

  1. China university of petroleum, Dongying 257061, China
  • Received:2010-10-29 Revised:2011-04-25 Online:2011-09-25 Published:2011-09-25

摘要: 提出-种在混凝土层析成像中对ART算法的射线矩阵的加权方法.利用BPT算法得到的低分辨率图像作为迭代初始值,并将其图形信息作为ART射线矩阵的加权系数.充分利用低分辨率图像的图形信息和数值信息,同时对高速异常单元和低速异常单元进行加权成像.计算机模拟试验表明,与传统的ART算法相比提高了反演数据的准确性和迭代速度;在走时数据误差不大于0.5%时,是对传统ART算法的-种较好的改进方法.

关键词: BPT算法, ART算法, 射线矩阵, 加权

Abstract: A weighting approach for ray matrix in ART algorithm for ultrasonic computerized tomogrnphy of concrete is developed. Firstly。a low-resolution image is generated by BPT algorithm and which is used asinitial value of iteration.Then,information of lowresolution image is used as weighting coefficients for ray matrix of ART algorithm.Image information and numerical information are used fully.High speed and low speed abnormal units can be weighted.As data error is less than 0.5%.examples show that the accuracy and iteration speed of improved method are better than that of traditional ART algorithm.

Key words: BPT algorithm, ART algorithm, ray matrix, weighting

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