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논문 기본 정보

자료유형
학술저널
저자정보
Jinseog Kim (Dongguk University) Rabindra Nath Das (Dongguk University) Poonam Singh (University of Delhi) Youngjo Lee (Seoul National University)
저널정보
한국통계학회 CSAM(Communications for Statistical Applications and Methods) CSAM(Communications for Statistical Applications and Methods) 제28권 제6호
발행연도
2021.11
수록면
595 - 610 (16page)

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초록· 키워드

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Recently a few articles have derived robust first-order rotatable and D-optimal designs for the lifetime response having distributions gamma, lognormal, Weibull, exponential assuming errors that are correlated with different correlation structures such as autocorrelated, intra-class, inter-class, tri-diagonal, compound symmetry. Practically, a first-order model is an adequate approximation to the true surface in a small region of the explanatory variables. A second-order model is always appropriate for an unknown region, or if there is any curvature in the system. The current article aims to extend the ideas of these articles for second-order models. Invariant (free of the above four distributions) robust (free of correlation parameter values) second-order rotatable designs have been derived for the intra-class and inter-class correlated error structures. Second-order rotatability conditions have been derived herein assuming the response follows non-normal distribution (any one of the above four distributions) and errors have a general correlated error structure. These conditions are further simplified under intra-class and inter-class correlated error structures, and second-order rotatable designs are developed under these two structures for the response having anyone of the above four distributions. It is derived herein that robust second-order rotatable designs depend on the respective error variance covariance structure but they are independent of the correlation parameter values, as well as the considered four response lifetime distributions.

목차

Abstract
1. Introduction
2. Motivating second-order real lifetime model example
3. Correlated lifetime second-order models
4. Second-order rotatability conditions with correlated errors
5. RSORDs for correlated lifetime models under intra and inter-class error structures
6. Concluding remarks
References

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