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层析成像中的阻尼代数重建技术

石油物探

1992年 31卷第No. 4期

阅读：81

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Title

SIMULTANEOUS DAMPING ALGEBRAIC RECONSTRUCTION TECHNIQUE IN TOMOGRAPHY

单位

大连理工大学工程力学所

Organization

Dalian University of Technology

摘要

在同时代数重构法(SART)中,引入阻尼项即可得到阻尼同时代数重构法(DSART)。可以证明,它收敛于阻尼最小二乘问题的解,因而克服了收敛于最小二乘问题的SIRT、SART法可能出现的不稳定解。文中给出了超声物理实验重建的结果。

Abstract

SDART (Simultaneous Damping Algebraic Reconstruction Techniquc) is constructed by introducing an additional damping term into SART (Simultaneous Algebraic Reconrtruction Technique), which can be shown to converge to the solution of a damping least-square problem. As a result, the ambiguity in solutions of SIRT and SART method can be avoided, which are supposed to converge to the solution of common L-S problems. Besides the theoritical description for SDART, some reconstruction results from sonic experiments in lab are presented in this paper.

关键词：

层析成像; 同时代数重构法(SART); 阻尼同时代数重构法(DSART); SIRT;

Keywords:

Tomography; Simultaneous Algebraic Reconstruction Technique (SART); Simultarcous Damping Algebraic Reconstruction Technique (SDART); SIRT;

基金项目

DOI