نتایج جستجو برای: estimates were obtained with restricted maximum likelihood method via ai algorithm

تعداد نتایج: 10779391  

Journal: :Ecological applications : a publication of the Ecological Society of America 2008
Nicholas Wolf Marc Mangel

We describe a novel spatially and temporally detailed approach for determining the cause or causes of a population decline, using the western Alaskan population of Steller sea lions (Eumetopias jubatus) as an example. Existing methods are mostly based on regression, which limits their utility when there are multiple hypotheses to consider and the data are sparse and noisy. Our likelihood-based ...

2002
Kimberly Weems K. S. Weems P. J. Smith

Mixed Poisson regression models, a class of generalized linear mixed models, are commonly used to analyze count data that exhibit overdispersion. Because inference for these models can be computationally difficult, simplifying distributional assumptions are often made. We consider an influence function representing effects of infinitesimal perturbations of the mixing distribution. This function...

Journal: :پژوهش های علوم دامی ایران 0
عاطفه عابدینی همایون فرهنگ فر کمال شجاعیان حسین نعیمی پور یونسی مسلم باشتنی بهروز محمد نظری

in this study, a total of 101,147 monthly test day records of somatic cell count collected from 13,977 first lactation holstein cows (in 183 herds) calved between 2002 and 2006 were used. for the genetic analysis, a random regression test day model was utilized. somatic cell score (scs) was calculated based on natural logarithm of somatic cell count. in the model, fixed effect of contemporary g...

Journal: :Computational Statistics & Data Analysis 2014
Mary Lesperance Rabih Saab John Neuhaus

An algorithm that computes nonparametric maximum likelihood estimates of a mixing distribution for a logistic regression model containing random intercepts and slopes is proposed. The algorithm identifies mixing distribution support points as the maxima of the gradient function using a direct search method. The mixing proportions are then estimated through a quadratically convergent method. Two...

2005
Wei Yue Jun Zhu JUN ZHU

Multiresolution tree-structured models are attractive when dealing with large amounts of spatial data in environmental sciences. With the multiresolution tree structure, a change-of-resolution Kalman filter algorithm has been devised to predict spatial processes in a computationally efficient manner (see, e.g., Huang and Cressie (1997) and Huang, Cressie and Gabrosek (2002)). In this article, w...

Journal: :Mathematics 2022

This paper explores statistical inferences when the lifetime of product follows inverse Nakagami distribution using progressive Type-II censored data. Likelihood-based and maximum spacing (MPS)-based methods are considered for estimating parameters model. In addition, approximate confidence intervals constructed via asymptotic theory both likelihood functions. Based on traditional functions, Ba...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شیخ بهایی - دانشکده ادبیات، زبانهای خارجی و تاریخ 1391

the present study sought to examine whether a task-based approach could have an impact on raising awareness of collocations. moreover, it sought to investigate the facilitative role of consciousness-raising tasks of collocations in the communicative instances of use. to this end, 68 intermediate learners of english were selected via a placement test. the participants were taught with classroom ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تبریز - دانشکده علوم طبیعی 1391

in recent years many researchers have been focused on interaction of small molecules with dna. dna is generally the primary intracellular of anticancer drugs, so the interaction between small molecules and dna can cause dna damage in cancer cells, blocking the division of cancer cells and resulting in cell death. the flavonoids are a large group of polyphenolic natural products that are widely ...

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