...归结为求解形如Ax=b的大型线性方程组,此时系数矩阵A和b是通过测量或其它方法得到的,但是在多数情况下方程可能是病态的(ill-posed),即A的条件数非常大.
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ill-posed problem 病态问题
Inverse and Ill-posed Problems 反问题
ill-posed inverse 病态求逆
ill-posed matrix 病态矩阵
ill-posed inversion 病态反演
ill-posed matrix equation 病态矩阵方程
Image reconstruction algorithm is the ECT key technique. Image reconstruction that reconstruct image in the imaging area by measuring capacitance around the imaging area is a nonlinear and ill-posed inverse problem.
图像重建算法是ECT系统的关键技术,是一个非线性的、不适定的逆问题,是通过有限个观测数据(电容测量值)将成像区域内介质的介电常数分布图重建出来。
参考来源 - RBF神经网络在ECT图像重建中的应用研究Most of inverse problems are ill-posed, which is a main difficulty for the research.
反问题大都具有不适定的特点,该特点也是反问题研究的难点所在。
参考来源 - 利用最优化方法确定二阶抛物型方程的低阶项系数·2,447,543篇论文数据,部分数据来源于NoteExpress
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