[1]郭珍艳,宋 旸,李振华,等.发射计算层析的轴对称流场投影修正方法[J].南京理工大学学报(自然科学版),2013,37(03):68.
　Guo Zhenyan,Song Yang,Li Zhenhua,et al.Correction method of axisymmetric flow field projection in emission computerized tomography[J].Journal of Nanjing University of Science and Technology,2013,37(03):68.
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发射计算层析的轴对称流场投影修正方法
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《南京理工大学学报》（自然科学版）[ISSN:1005-9830/CN:32-1397/N]

卷:
37卷
期数:
2013年03期
页码:
68
栏目:
出版日期:
2013-06-30

文章信息/Info

Title:
Correction method of axisymmetric flow field projection in emission computerized tomography
作者:
郭珍艳; 宋 旸; 李振华; 贺安之
南京理工大学 理学院,江苏 南京 210094
Author(s):
Guo Zhenyan; Song Yang; Li Zhenhua; He Anzhi
School of Sciences,NUST,Nanjing 210094,China
关键词:
发射计算层析;  轴对称流场;  投影;  修正;  Radon变换
Keywords:
emission computerized tomography;  axisymmetric flow field;  projection;  correction;  Radon transform
分类号:
O432
摘要:
为实现对轴对称流场的精确诊断,该文提出一种对发射计算层析的轴对称流场投影进行修正的方法。该方法通过Radon变换自动找出倾斜投影的对称轴,投影修正后取与对称轴垂直的数据作为截面投影进行重建。通过数值模拟对该投影修正方法进行了验证,并对重建结果进行了分析。分析结果表明:在轴对称流场存在小角度偏转时,对其投影进行对称轴修正后的重建精度高于投影未修正时的重建精度,并且在5°范围内偏转角度越大修正后重建精度越高。
Abstract:
In order to diagnose the axisymmetric flow field more accurately,a new method to correct the axisymmetric flow field projection in emission computerized tomography is proposed here.This method can find out the symmetry axis of the oblique projection automatically by Radon transform.After correcting the projection,the data perpendicular to the axis of symmetry are chosen as the section projection for reconstruction.This projection corrected method is verified by numerical simulation and the reconstruction results are analyzed.The results show:when the axisymmetric flow field has a small angle deflection,the reconstruction accuracy with the corrected projection is higher than that without the corrected projection.Within 5° of deflection angle,the greater the deflection angle is,the higher the reconstruction precision is.

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备注/Memo

备注/Memo:
收稿日期:2012-10-11 修回日期:2013-04-15
作者简介:郭珍艳(1986-),女,博士生,主要研究方向:火焰场的发射计算层析诊断,E-mail:guozhenyan15@163.com; 通讯作者:宋旸(1981-),男,博士,副教授,主要研究方向:流场诊断,E-mail:sy0204@njust.edu.cn。
更新日期/Last Update: 2013-03-25