本文關(guān)鍵詞：基于SQP算法的彌散介質(zhì)輻射物性場(chǎng)重建　出處：《化工學(xué)報(bào)》2017年S1期 　論文類(lèi)型：期刊論文

  更多相關(guān)文章： 序列二次規(guī)劃 物性重建 時(shí)域輻射傳輸 算法 輻射 數(shù)值模擬

【摘要】：介質(zhì)的輻射物性的參數(shù)測(cè)量在高溫火焰燃燒診斷、無(wú)損檢測(cè)、生物醫(yī)學(xué)成像等領(lǐng)域有著廣泛的應(yīng)用。傳統(tǒng)的直接測(cè)量方法得到的大多是測(cè)量試件的等效物性,精確的測(cè)量通常需要通過(guò)反演的方法得到。利用時(shí)域輻射傳輸方程模擬脈沖激光在彌散介質(zhì)內(nèi)的傳輸,求解介質(zhì)邊界的透反射信號(hào)。采用序列二次規(guī)劃(sequential quadratic programming,SQP)算法求解反問(wèn)題,重建了二維彌散介質(zhì)內(nèi)的吸收系數(shù)和散射系數(shù)分布。利用廣義的高斯-馬爾科夫隨機(jī)場(chǎng)模型構(gòu)建正則化項(xiàng),加入目標(biāo)函數(shù)中以克服反問(wèn)題的病態(tài)特性。同時(shí)使用OpenMP并行計(jì)算技術(shù)對(duì)部分代碼做了并行化處理,從而大大減少了重建時(shí)間。重建結(jié)果表明基于SQP算法能夠很好地重建出吸收系數(shù)和散射系數(shù)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.
【作者單位】： 哈爾濱工業(yè)大學(xué)能源科學(xué)與工程學(xué)院;
【基金】：國(guó)家自然科學(xué)基金項(xiàng)目(51476043)~~
【分類(lèi)號(hào)】：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)引言介質(zhì)的輻射物性的參數(shù)測(cè)量在很多，

本文編號(hào)：1435415