نتایج جستجو برای: log normal and gamma gamma distributions

تعداد نتایج: 16900978  

2011
Filipe J. Marques Carlos A. Coelho Miguel de Carvalho

We show that the exact distribution of a positive linear combination of independent Gumbel random variables can be written as the sum of a linear combination of independent log Gamma distributions, and an independent shifted Generalized Integer Gamma distribution. Given the complexity of this exact distribution, we develop a near-exact distribution using a shifted Generalized Near-Integer Gamma...

Journal: :international journal of group theory 2014
francesco de giovanni martin l. newell alessio russo

‎motivated by a celebrated theorem of schur‎, ‎we show that if~$gamma$ is a normal subgroup of the full automorphism group $aut(g)$ of a group $g$ such that $inn(g)$ is contained in $gamma$ and $aut(g)/gamma$ has no uncountable abelian subgroups of prime exponent‎, ‎then $[g,gamma]$ is finite‎, ‎provided that the subgroup consisting of all elements of $g$ fixed by $gamma$ has finite index‎. ‎so...

Journal: :Communications in Partial Differential Equations 2023

The main result of this article gives scaling asymptotics the Wigner distributions $W_{\varphi_N^{\gamma},\varphi_N^{\gamma}}$ isotropic harmonic oscillator orbital coherent states $\varphi_N^{\gamma}$ concentrating along Hamiltonian orbits $\gamma$ in shrinking tubes around phase space. In particular, these exhibit a $\textit{hybrid}$ semi-classical scaling. That is, simultaneously, we have an...

Journal: :توسعه پایدار جنگل 0
بهزاد بخشنده ناورود دانشجوی دکتری جنگلداری، دانشکده کشاورزی، دانشگاه لرستان، ایران جواد سوسنی استادیار گروه جنگلداری، دانشکده کشاورزی، دانشگاه لرستان، ایران شیدا خسروی دانشجوی دکتری جنگلداری، دانشکده کشاورزی، دانشگاه لرستان، ایران حسام الدین برزکوهی دانش آموخته کارشناسی ارشد جنگلداری، دانشگاه آزاد اسلامی واحد لاهیجان، ایران مهرزاد ناصری خلخالی دانش آموخته کارشناسی ارشد جنگلداری، دانشگاه آزاد اسلامی واحد علوم و تحقیقات تهران، ایران

the implementation of different silvicultural systems can be effective on different characteristics of forest stands, such as stand structure and diameter distribution of trees. this study was carried out in shafaroud forests of gilan province of northern iran. the objectives of this research were 1) to evaluate the suitability of different probability distribution functions, including weibull,...

Journal: :Electronic Communications in Probability 2014

Journal: :The Astrophysical Journal 2021

Recent studies of gamma-ray, cosmic-ray and radio data put stringent constraints on the fraction primordial black holes (PBHs) in our universe. In this article, we propose a new indirect method using X-ray luminosity cool-core clusters to constrain evaporating PBH for monochromatic, log-normal power-law mass distributions. The present results show that amount PBHs only constitutes minor compone...

ژورنال: سنجش و ایمنی پرتو 2020

In this study, 34 soil samples were collected from the east of the Shazand power plant to the  Arak city, with a length of 25 km. The specific activities of radionuclides of 226Ra, 232Th, 40K, and 137Cs were determined using gamma-ray spectrometry method. Gamma-ray spectra registered to employ high purity germanium (HPGe) detector with 30% relative efficiency. Specific activities of correspondi...

2010
E. Ozarslan N. Shemesh C. Koay Y. Cohen P. J. Basser

INTRODUCTION The influence of molecular diffusion on the MR signal can be exploited to estimate compartment size distributions in heterogeneous specimens [1]. There has been recent interest in adopting this idea to characterize axon diameter distributions in white matter [2]. To this end, previous studies have assumed a known statistical distribution of compartment sizes (such as log-normal or ...

ژورنال: پژوهش های ریاضی 2020

The standard kernel density estimator suffers from a boundary bias issue for probability density function of distributions on the positive real line. The Gamma kernel estimators and orthogonal series estimators are two alternatives which are free of boundary bias. In this paper, a simulation study is conducted to compare small-sample performance of the Gamma kernel estimators and the orthog...

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