基于SQP算法的弥散介质辐射物性场重建

发布时间：2018-01-17 00:07

  本文关键词：基于SQP算法的弥散介质辐射物性场重建　出处：《化工学报》2017年S1期 　论文类型：期刊论文

  更多相关文章： 序列二次规划 物性重建 时域辐射传输 算法 辐射 数值模拟

【摘要】：介质的辐射物性的参数测量在高温火焰燃烧诊断、无损检测、生物医学成像等领域有着广泛的应用。传统的直接测量方法得到的大多是测量试件的等效物性,精确的测量通常需要通过反演的方法得到。利用时域辐射传输方程模拟脉冲激光在弥散介质内的传输,求解介质边界的透反射信号。采用序列二次规划(sequential quadratic programming,SQP)算法求解反问题,重建了二维弥散介质内的吸收系数和散射系数分布。利用广义的高斯-马尔科夫随机场模型构建正则化项,加入目标函数中以克服反问题的病态特性。同时使用OpenMP并行计算技术对部分代码做了并行化处理,从而大大减少了重建时间。重建结果表明基于SQP算法能够很好地重建出吸收系数和散射系数的分布。
[Abstract]:The parameter measurement of radiation physical properties of the medium has been widely used in the field of high-temperature flame combustion diagnosis, nondestructive testing, biomedical imaging, etc. The traditional direct measurement method is mostly to measure the equivalent physical properties of the specimen. The accurate measurement usually needs to be obtained by inversion method. The time-domain radiation transfer equation is used to simulate the propagation of pulsed laser in dispersive medium. The inverse problem is solved by using sequential quadratic programming quadratic programming algorithm. The distribution of absorption and scattering coefficients in two-dimensional dispersive media is reconstructed and the regularization term is constructed by using the generalized Gao Si Markov random field model. The object function is added to overcome the ill-conditioned property of inverse problem. At the same time, part of the code is parallelized by using OpenMP parallel computing technology. The reconstruction results show that the distribution of absorption coefficient and scattering coefficient can be well reconstructed based on SQP algorithm.
【作者单位】： 哈尔滨工业大学能源科学与工程学院;
【基金】：国家自然科学基金项目(51476043)~~
【分类号】：TN247
【正文快照】： Radiative properties reconstruction of disperse mediabased on SQP algorithmCHEN Qin,QI Hong,ZHANG Zeyu,RUAN Liming(School of Energy Science and Engineering,Harbin Institute of Technology,Harbin 150001,Heilongjiang,China)引言介质的辐射物性的参数测量在很多，

本文编号：1435415