نتایج جستجو برای: maximum likelihood

تعداد نتایج: 357813  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تبریز - دانشکده علوم طبیعی 1393

گونه¬یangustifoli elaeagnus از تیره¬ی elaeagnaceae، در سراسر نیمه¬ی شمالی توزیع شده و شامل چندین گونه است. در این مطالعه، توالی نوکلئوتیدی nrdna its، بین چهار واریته e. angustifolia var senjed-ghandi ،eangustifolia var. mamali، var. haji-ghandi e. angustifoliaوe. angustifolia var. darehvar مورد بررسی قرار گرفت.dna از بذرها استخراج و با پروفایل pcr و پرایمر its1 توالی یابی شدند که نولید باند شار...

2016
Tanja Krone Casper J. Albers Marieke E. Timmerman

To estimate a time series model for multiple individuals, a multilevel model may be used. In this paper we compare two estimation methods for the autocorrelation in Multilevel AR(1) models, namely Maximum Likelihood Estimation (MLE) and Bayesian Markov Chain Monte Carlo. Furthermore, we examine the difference between modeling fixed and random individual parameters. To this end, we perform a sim...

Journal: :Lifetime data analysis 2007
Alastair John Scott Alan J Lee C J Wild

Breslow and Holubkov (J Roy Stat Soc B 59:447-461 1997a) developed semiparametric maximum likelihood estimation for two-phase studies with a case-control first phase under a logistic regression model and noted that, apart for the overall intercept term, it was the same as the semiparametric estimator for two-phase studies with a prospective first phase developed in Scott and Wild (Biometrica 84...

Journal: :Demography 2010
Deepankar Basu Robert de Jong

This article draws out some implications of son targeting fertility behavior and studies its determinants. We demonstrate that such behavior has two notable implications at the aggregate level: (a) girls have a larger number of siblings (sibling effect), and (b) girls are born at relatively earlier parities within families (birth-order effect). Empirically testing for these effects, we find tha...

2004
Takanori Adachi Hiroshi Hirano Yoichi Hizen Yusaku Horiuchi Claire Lim Ryo Okui Mari Sakudo Masaki Taniguchi

This paper proposes a method to estimate relative ministerial weights in parliamentary democracies. Specifically, our method combines a bargaining model of government formation with maximum likelihood estimation. The data required for estimation are who formateurs are, what each party’s voting weight is, and what ministerial seats each party obtains. We use variation of the data and the structu...

Journal: :Statistics in medicine 2009
K L Moore M J van der Laan

Covariate adjustment using linear models for continuous outcomes in randomized trials has been shown to increase efficiency and power over the unadjusted method in estimating the marginal effect of treatment. However, for binary outcomes, investigators generally rely on the unadjusted estimate as the literature indicates that covariate-adjusted estimates based on the logistic regression models ...

Journal: :Physica A 1999
C M Kendziorski J B Bassingthwaighte P J Tonellato

A maximum likelihood estimation method implemented in S-PLUS (S-MLE) to estimate the Hurst coefficient (H) is evaluated. The Hurst coefficient, with 0.5 < H <1, characterizes long memory time series by quantifying the rate of decay of the autocorrelation function. S-MLE was developed to estimate H for fractionally differenced (fd) processes. However, in practice it is difficult to distinguish b...

Journal: :The Journal of chemical physics 2015
Benjamin Trendelkamp-Schroer Hao Wu Fabian Paul Frank Noé

Reversibility is a key concept in Markov models and master-equation models of molecular kinetics. The analysis and interpretation of the transition matrix encoding the kinetic properties of the model rely heavily on the reversibility property. The estimation of a reversible transition matrix from simulation data is, therefore, crucial to the successful application of the previously developed th...

Journal: :American journal of epidemiology 2014
Stephen R Cole Haitao Chu Sander Greenland

The method of maximum likelihood is widely used in epidemiology, yet many epidemiologists receive little or no education in the conceptual underpinnings of the approach. Here we provide a primer on maximum likelihood and some important extensions which have proven useful in epidemiologic research, and which reveal connections between maximum likelihood and Bayesian methods. For a given data set...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید