Some Remarks on the Choice of Regularization Parameters under Multiple-Precision Arithmetic

Some Remarks on the Choice of Regularization Parameters under Multiple-Precision Arithmetic
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关于多精度算法下正则化参数选择的几点思考

DOI:
10.11345/nctam.51.387
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发表时间:
2002
期刊:
Theoretical and applied mechanics Japan
影响因子:
--
通讯作者:
Y. Iso
Y. Iso
中科院分区:
--
文献类型:
--
作者:
H. Fujiwara;Y. Iso

文献摘要

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我们精确地讨论了多精度算法环境下不适定问题正则化方案中参数的选择。正则化格式在适当的空间中给出了一个数学适定的方程,但是,当正则化参数很小时,其离散化变得病态,在双精度计算环境中精确的数值计算似乎是不可能的。
We precisely discuss the choice of a parameter in regularization schemes for ill-posed problems under a multiple-precision arithmetic environment. A regularization scheme gives a mathematically well-posed equation in a suitable space, however, its discretizations become ill-conditioned for small regularization parameters, and precise numerical computation seems impossible in the double precision computing environment.