计算机工程与应用 ›› 2010, Vol. 46 ›› Issue (31): 157-160.DOI: 10.3778/j.issn.1002-8331.2010.31.043

• 图形、图像、模式识别 • 上一篇    下一篇

多维输出SVR的ECT两相流图像重建方法

李建伟1,2,杨晓光1,汪友华1   

  1. 1.河北工业大学 电磁场与电器可靠性省部共建重点实验室,天津 300130
    2.河北工业大学 计算机科学与软件学院,天津 300130
  • 收稿日期:2010-07-06 修回日期:2010-08-26 出版日期:2010-11-01 发布日期:2010-11-01
  • 通讯作者: 李建伟

Image reconstruction method of two-phase flow regimes based on multi-dimensional support vector regression and electrical capacitance tomography

LI Jian-wei1,2,YANG Xiao-guang1,WANG You-hua1   

  1. 1.Province-Ministry Joint Key Laboratory of Electromagnetic Field and Electrical Apparatus Reliability,Hebei University of Technology,Tianjin 300130,China
    2.School of Computer Science and Software,Hebei University of Technology,Tianjin 300130,China
  • Received:2010-07-06 Revised:2010-08-26 Online:2010-11-01 Published:2010-11-01
  • Contact: LI Jian-wei

摘要: 根据电容层析成像(ECT)中两相流识别问题的特点,提出基于多维输出支持向量回归机(MSVR)的图像重建算法。采用超球空间不敏感损失函数的MSVR是支持向量机理论的一个重要分支,它有效地克服了神经网络算法中的过学习问题,具有较强的泛化能力。近似迭代变权最小二乘法(IRWLS)在保证MSVR回归精度的基础上,有效地简化了其求解过程,可快速建立电容测量值与成像区域介电常数分布之间的非线性映射关系。对包含6种典型两相流流型的仿真数据进行实验。结果表明,该方法泛化能力强,图像重建精度高。

Abstract: Electrical capacitance tomography(ECT) technique is a very complex nonlinear problem.To solve the ill-posed image reconstruction problem,a new method based on multi-dimensional support vector regression(MSVR) is proposed.The MSVR with a hyper-spherical insensitive zone is an import branch of SVM,overcoming the over-fitting of neural networks.Similar Iterative Re-Weight Least Square(IRWLS) algorithm is used to simply the realization of MSVR,a nonlinear map between capacitance measurements and the permittivity distribution in image region is built fastly.Using the data and MSVR method,simulation experiments are carried out for six typical flow regimes.The results prove that MSVR is an effective approach to solve image reconstruction for ECT.

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