نتایج جستجو برای: log normal and gamma gamma distributions

تعداد نتایج: 16900978  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعتی خواجه نصیرالدین طوسی - دانشکده ریاضی 1393

فرض کنید ‎$ r $‎ حلقه ای جابه ‎جایی و یکدار و ‎$ z(r) $‎ مجموعه مقسوم علیه های صفر حلقه ‎$ r $‎ باشد. گراف جمعی حلقه ‎$ r $‎ گرافی است که رئوس آن عناصر حلقه می باشد و دو راس متمایز ‎$ x $‎ و ‎$ y $‎ مجاورند اگر و تنها اگر ‎$ x+y in z(r) $‎ . این گراف با نماد ‎$ t(gamma(r)) $‎ نمایش داده می شود. در این پایان نامه دو زیر گراف ‎$ t_0(gamma(r)) $‎ و ‎$ z_0(gamma(r)) $‎ که رئوس آن به ترتیب ‎$ r ^* $...

Journal: :Forests 2021

The creation and maintenance of complex forest structures has become an important forestry objective. Complex structures, often expressed in multimodal shapes tree size/diameter (DBH) distributions, are challenging to model. Mixture probability density functions two- or three-component gamma, log-normal, Weibull mixture models offer a solution can additionally provide insights into dynamics. Mo...

Arass Rasaei, Raheleh Rooshenas

Introduction: Electronic portal imaging devices (EPIDs) could potentially be useful for intensity-modulated radiation therapy (IMRT) and VMAT QA. The data density, high resolution, large active area, and efficiency of the MV EPID make it an attractive option. However, EPIDs were designed as imaging devices, not dosimeters, and as a result they do not inherently measure dose in ...

2015
Ayman Alzaatreh Carl Lee Felix Famoye

In this paper, a family of generalized gamma distributions, T -gamma family, has been proposed using the T -R{Y } framework. The family of distributions is generated using the quantile functions of uniform, exponential, log logistic, logistic and extreme value distributions. Several general properties of the T -gamma family are studied in details including moments, mean deviations, mode and Sha...

Journal: :Journal of Statistical Modelling and Analytics 2021

Groundwater is the water present beneath earth’s surface in soil pore spaces and fractures of rock formations. Establishing a probability distribution that provides good fit to groundwater quality has recently become topic interest fields hydrology, meteorology among others. In this paper, three datasets including calcium, magnesium, chloride are fitted normal, lognormal, gamma, Weibull, logist...

2004
Seiichiro I. Aoki Seiji Yashiro Kazunari Shibata

We investigated the statistical distributions of physical quantities of solar flares and associated coronal mass ejections (CMEs). We found that the distributions of the X-ray peak fluxes of CME-related flares, their time intervals, and speeds of associated CMEs are in good agreement with log-normal distributions. One possible interpretation of this is that only large energetic mass ejections c...

Journal: :The Journal of the Japanese Association of Mineralogists, Petrologists and Economic Geologists 1963

Journal: :Transactions of the American Mathematical Society 2022

For any cofinite Fuchsian group Γ ⊂ mathvariant...

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