Results 31 to 40 of about 14,783,684 (194)

Expectation-Maximization Algorithm for the Weibull Proportional Hazard Model under Current Status Data

open access: yesMathematics, 2023
Due to the flexibility of the Weibull distribution and the proportional hazard (PH) model, Weibull PH is widely used in survival analysis under right censored data and interval censored data but it is seldom investigated under current status data ...
Sisi Chen, Fengkai Yang
doaj   +1 more source

Pemodelan Laju Kematian Pasien Covid-19 di RSUD Abdul Wahab Sjahranie Samarinda menggunakan Model Regresi Weibull [PDF]

open access: yes, 2023
Model regresi Weibull adalah pengembangan dari distribusi Weibull, yakni distribusi Weibull yang dipengaruhi langsung oleh kovariat. Model-model regresi Weibull yang dibahas pada penelitian ini adalah model regresi survival Weibull dan regresi hazard ...
Azizah, Nur -   +2 more
core   +1 more source

A covariance-based test for shared frailty in multivariate lifetime data [PDF]

open access: yes, 2012
We decompose the score statistic for testing for shared finite variance frailty in multivariate lifetime data into marginal and covariance-based terms.
Kimber, Alan, Sarker, Shah-Jalal
core   +1 more source

Classical and Bayesian estimation for type-I extended-F family with an actuarial application.

open access: yesPLoS ONE, 2023
In this work, a new flexible class, called the type-I extended-F family, is proposed. A special sub-model of the proposed class, called type-I extended-Weibull (TIEx-W) distribution, is explored in detail.
Nada M Alfaer   +5 more
doaj   +1 more source

The Burr X Exponentiated Weibull Model: Characterizations, Mathematical Properties and Applications to Failure and Survival Times Data [PDF]

open access: yes, 2019
In this article, we introduce a new three-parameter lifetime model called the Burr X exponentiated Weibull model. The major justification for the practicality of the new lifetime model is based on the wider use of the exponentiated Weibull and Weibull ...
Hamedani, G. G.   +3 more
core   +1 more source

Robust fitting of a Weibull model with optional censoring [PDF]

open access: yesComputational Statistics & Data Analysis, 2013
The Weibull family is widely used to model failure data, or lifetime data, although the classical two-parameter Weibull distribution is limited to positive data and monotone failure rate. The parameters of the Weibull model are commonly obtained by maximum likelihood estimation; however, it is well-known that this estimator is not robust when dealing ...
Yang, Jingjing, Scott, David W.
openaire   +3 more sources

Gradation characteristics and envelope curve design method for natural sandy gravel

open access: yesYantu gongcheng xuebao, 2019
Due to the limitation of the number of samples, the particle-size envelope method for directly determining the sand-gravel design line according to the gradation curve of exploration stockyard is difficult to reasonably reflect the actual gradation range
ZHU Sheng 1, 2, SHEN Feng-sheng 3
doaj   +1 more source

Weibull-like Model of Cancer Development in Aging

open access: yes, 2010
Mathematical modeling of cancer development is aimed at assessing the risk factors leading to cancer. Aging is a common risk factor for all adult cancers.
Simon Sherman, Tengiz Mdzinarishvili
core   +1 more source

Multivariable AFT regression analysis model with Weibull distribution.

open access: yes, 2022
Multivariable AFT regression analysis model with Weibull distribution.
Teshale Gemechu (13155059)   +3 more
core   +1 more source

Estimasi Parameter Model Survival Distribusi Mixture Weibull [PDF]

open access: yes, 2019
Penelitian ini membahas tentang estimasi model survival distribusi Mixture Weibull menggunakan inferensi Bayes dengan memperhatikan distribusi prior.
Hasmayuni, Reskika   +3 more
core   +1 more source

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