提出了一种由边界出射辐射强度反演吸收散射性三维矩形介质内辐射源项分布的方法。该方法是在辐射传递方程离散坐标近似的基础上，用求目标函数极小值的共轭梯度法进行反演计算。通过对介质辐射特性、光学厚度等参数对反演精度影响的分析，结果表明，即使存在测量误差，本文所提出的方法可较精确地反演辐射源项。
An inverse radiation analysis is presented for estimating the unknown sourceterm in a three-dimensional absorbing, emitting, scattering rectangular mediumfrom the knowledge of the radiation intensities exiting the boundaries. Thediscrete ordinates method is used to developed a solution to an inverseradiation problem. The inverse problem is solved using conjugate gradientmethod that minimizes the errors between exit radiation intensities calculatedand experimental data. The effects of measurement errors, radiative properties,and optical thickness on the accuracy of inverse analysis are investigated. Theresults of estimation show that the source term can be estimated accurately,even with noisy data.
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