Analysis of the Ill-Posedness in Subgroup Parameter Calculation Based on Pade Approximation and Research on Improved Methods

This paper addresses the ill-posed problem in calculating subgroup parameters for resonance self-shielding within nuclear reactor physics. The conventional Pade approximation method often yields negative subgroup cross-sections lacking physical meaning due to its treatment of overdetermined nonlinea...

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Bibliographic Details

Published in:	Mathematics
Main Authors:	Yongfa Zhang, Song Li, Lei Liu, Xinwen Zhao, Qi Cai, Qian Zhang
Format:	Article
Language:	English
Published:	MDPI AG 2025-08-01
Subjects:	subgroup method Pade approximation subgroup parameter resonance self-shielding treatment
Online Access:	https://www.mdpi.com/2227-7390/13/16/2628