نتایج جستجو برای: bayesian

تعداد نتایج: 81723  

Journal: :gastroenterology and hepatology from bed to bench 0
nastaran hajizadeh department of biostatistics, shahid beheshti university of medical sciences, tehran, iran mohamad amin pourhoseingholi phd, research institute for gastroenterology and liver diseases, shahid beheshti university of medical sciences, tehran, iran. ahmad reza baghestani department of biostatistics, shahid beheshti university of medical sciences, tehran, iran alireza abadi department of biostatistics, shahid beheshti university of medical sciences, tehran, iran ghoreshi behnaz

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Farzad Eskandari, M. Reza Meshkani,

Following a Bayesian statistical inference paradigm, we provide an alternative methodology for analyzing a multivariate logistic regression. We use a multivariate normal prior in the Bayesian analysis. We present a unique Bayes estimator associated with a prior which is admissible. The Bayes estimators of the coefficients of the model are obtained via MCMC methods. The proposed procedure...

Journal: :the international journal of humanities 2013
a. mark pollard hossein davoudi iman mostafapour hamid reza valipour hassan fazeli nashli

archaeological excavations on the western part of the central iranian plateau, known as the qazvin plain provides invaluable information about the sedentary communities from early occupation to the later prehistoric era. despite the past archeological data, chronological studies mostly rely on the relative use of the bayesian modeling for stratigraphically-related radiocarbon dates. the current...

Journal: :journal of sciences islamic republic of iran 0

in this paper, we consider the determination methods of maximum entropy multivariate distributions with given prior under the constraints, that the marginal distributions or the marginals and covariance matrix are prescribed. next, some numerical solutions are considered for the cases of unavailable closed form of solutions. finally, these methods are illustrated via some numerical examples.

This paper presents an extension of Bayesian networks (BN) applied to reliability analysis of an open gas generator cycle Liquid propellant engine (OGLE) of launch vehicles. There are several methods for system reliability analysis such as RBD, FTA, FMEA, Markov Chains, and etc. But for complex systems such as LV, they are not all efficiently applicable due to failure dependencies between compo...

Ali Akbar Sadri Sa'eed Jalili

Nowadays, the automated text classification has witnessed special importance due to the increasing availability of documents in digital form and ensuing need to organize them. Although this problem is in the Information Retrieval (IR) field, the dominant approach is based on machine learning techniques. Approaches based on classifier committees have shown a better performance than the others. I...

The interactions among peers in Peer-to-Peer systems as a distributed collaborative system are based on asynchronous and unreliable communications. Trust is an essential and facilitating component in these interactions specially in such uncertain environments. Various attacks are possible due to large-scale nature and openness of these systems that affects the trust. Peers has not enough inform...

ژورنال: طلوع بهداشت یزد 2018

Introduction: Breast cancer is one of the common diseases among women with various factors involved in its development. The aim of this study was to determine the factors affecting the survival of women with breast cancer in Yazd using Cox's model as Bayesian and Classic. Method: A population-based study of 538 breast cancer women registered in the clinical database of the Ramezanzade Radiothe...

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