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    Wyświetlanie 1-8 z 8
    Tytuł:
    Global approximations for the γ-order Lognormal distribution
    Autorzy:
    Toulias, Thomas
    Powiązania:
    https://bibliotekanauki.pl/articles/729844.pdf
    Data publikacji:
    2013
    Wydawca:
    Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
    Tematy:
    cumulative distribution function
    γ-order Lognormal distribution
    global Padé approximation
    Opis:
    A generalized form of the usual Lognormal distribution, denoted with $_γ$, is introduced through the γ-order Normal distribution $_γ$, with its p.d.f. defined into (0,+∞). The study of the c.d.f. of $_γ$ is focused on a heuristic method that provides global approximations with two anchor points, at zero and at infinity. Also evaluations are provided while certain bounds are obtained.
    Źródło:
    Discussiones Mathematicae Probability and Statistics; 2013, 33, 1-2; 99-110
    1509-9423
    Pojawia się w:
    Discussiones Mathematicae Probability and Statistics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Kernel Estimation of Cumulative Distribution Function of a Random Variable with Bounded Support
    Autorzy:
    Baszczyńska, Aleksandra
    Powiązania:
    https://bibliotekanauki.pl/articles/465685.pdf
    Data publikacji:
    2016
    Wydawca:
    Główny Urząd Statystyczny
    Tematy:
    boundary effects
    cumulative distribution function
    kernel method
    bounded support
    Opis:
    In the paper methods of reducing the so-called boundary effects, which appear in the estimation of certain functional characteristics of a random variable with bounded support, are discussed. The methods of the cumulative distribution function estimation, in particular the kernel method, as well as the phenomenon of increased bias estimation in boundary region are presented. Using simulation methods, the properties of the modified kernel estimator of the distribution function are investigated and an attempt to compare the classical and the modified estimators is made.
    Źródło:
    Statistics in Transition new series; 2016, 17, 3; 541-556
    1234-7655
    Pojawia się w:
    Statistics in Transition new series
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    MLE for the γ-order Generalized Normal Distribution
    Autorzy:
    Kitsos, Christos
    Vassiliadis, Vassilios
    Toulias, Thomas
    Powiązania:
    https://bibliotekanauki.pl/articles/729734.pdf
    Data publikacji:
    2014
    Wydawca:
    Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
    Tematy:
    γ-order Normal distribution
    cumulative distribution
    truncated distribution
    hazard rate
    Maximum likelihood estimation
    Opis:
    The introduced three parameter (position μ, scale ∑ and shape γ) multivariate generalized Normal distribution (γ-GND) is based on a strong theoretical background and emerged from Logarithmic Sobolev Inequalities. It includes a number of well known distributions such as the multivariate Uniform, Normal, Laplace and the degenerated Dirac distributions. In this paper, the cumulative distribution, the truncated distribution and the hazard rate of the γ-GND are presented. In addition, the Maximum Likelihood Estimation (MLE) method is discussed in both the univariate and multivariate cases and asymptotic results are presented.
    Źródło:
    Discussiones Mathematicae Probability and Statistics; 2014, 34, 1-2; 143-158
    1509-9423
    Pojawia się w:
    Discussiones Mathematicae Probability and Statistics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Infinite-Valued Łukasiewicz Logic and Probability
    Autorzy:
    Czelakowski, Janusz
    Powiązania:
    https://bibliotekanauki.pl/articles/749934.pdf
    Data publikacji:
    2017
    Wydawca:
    Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
    Tematy:
    probability
    cumulative distribution function
    the infinite-valued standard Łukasiewicz algebra
    consequence relation
    Opis:
    The paper concerns the algebraic structure of the set of cumulative distribution functions as well as the relationship between the resulting algebra and the infinite-valued Łukasiewicz algebra. The paper also discusses interrelations holding between the logical systems determined by the above algebras.
    Źródło:
    Bulletin of the Section of Logic; 2017, 46, 1/2
    0138-0680
    2449-836X
    Pojawia się w:
    Bulletin of the Section of Logic
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effects of rain attenuation on satellite communication link
    Autorzy:
    Ezeh, G.N.
    Chukwuneke, N.S
    Ogujiofor, N.C.
    Diala, U.H.
    Powiązania:
    https://bibliotekanauki.pl/articles/103340.pdf
    Data publikacji:
    2014
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    correctional factor
    cumulative distribution curve
    outage rain rate
    prediction model
    rain attenuation
    satellite communication
    Opis:
    Rain attenuation is a major challenge to microwave satellite communication especially at frequencies above 10 GHz, causing unavailability of signals most of the time. Rain attenuation predictions have become one of the vital considerations while setting up a satellite communication link. In this study, rain attenuation models, cumulative distribution curves and other analytical tools for successful prediction of rain attenuation are presented. A three year Rain rate data was obtained from the Nigeria Meteorological Agency (NIMET) database in addition to experimental data. Of the three prediction models used in the study, Ajayi model gave the range of values closest to the experimental data. A correctional factor was determined as 1.0988 and used to modify the Ajayi model. This modification to Ajayi’s model enabled its rain attenuation values conform more closely to the experimental result.
    Źródło:
    Advances in Science and Technology. Research Journal; 2014, 8, 22; 1-11
    2299-8624
    Pojawia się w:
    Advances in Science and Technology. Research Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A multi-source fluid queue based stochastic model of the probabilistic offloading strategy in a MEC system with multiple mobile devices and a single MEC server
    Autorzy:
    Zheng, Huan
    Jin, Shunfu
    Powiązania:
    https://bibliotekanauki.pl/articles/2055156.pdf
    Data publikacji:
    2022
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    mobile edge computing
    probabilistic offloading strategy
    multi-source fluid queue
    birth and death process
    cumulative distribution function
    przetwarzanie mobilne
    proces narodzin i śmierci
    dystrybuanta
    Opis:
    Mobile edge computing (MEC) is one of the key technologies to achieve high bandwidth, low latency and reliable service in fifth generation (5G) networks. In order to better evaluate the performance of the probabilistic offloading strategy in a MEC system, we give a modeling method to capture the stochastic behavior of tasks based on a multi-source fluid queue. Considering multiple mobile devices (MDs) in a MEC system, we build a multi-source fluid queue to model the tasks offloaded to the MEC server. We give an approach to analyze the fluid queue driven by multiple independent heterogeneous finite-state birth-and-death processes (BDPs) and present the cumulative distribution function (CDF) of the edge buffer content. Then, we evaluate the performance measures in terms of the utilization of the MEC server, the expected edge buffer content and the average response time of a task. Finally, we provide numerical results with some analysis to illustrate the feasibility of the stochastic model built in this paper.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2022, 32, 1; 125--138
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of a Simple Method of CMOS IC Design for Yield Optimization
    Autorzy:
    Tomaszewski, D.
    Yakupov, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/397989.pdf
    Data publikacji:
    2012
    Wydawca:
    Politechnika Łódzka. Wydział Mikroelektroniki i Informatyki
    Tematy:
    CMOS
    projektowanie pod kątem zysku
    funkcja gęstości prawdopodobieństwa
    dystrybuanta
    modelowanie statystyczne
    BPV
    symulacja SPICE
    design centering
    design for yield
    probability density function
    cumulative distribution function
    statistical modeling
    BPV method
    SPICE simulation
    Opis:
    A simple approach for CMOS integrated circuit (IC) design taking into account a process variability and oriented towards optimization of a parametric yield has been presented. Its concept is based on cumulative distribution functions of random variables representing IC performances subject to process variations. In the method it has been assumed that CMOS process statistical data are expressed in terms of so-called process parameter distributions. Thus the design centering is done via layout parameter tuning. The approach relies on maximizing the probability that random variables corresponding to IC performances remain within the performance boundaries. Also, a methodology for statistical characterization of CMOS process has been briefly described. Finally, the method operation has been illustrated using analytical and SPICE models of CMOS inverter, operational amplifier and ring oscillator.
    Źródło:
    International Journal of Microelectronics and Computer Science; 2012, 3, 3; 81-87
    2080-8755
    2353-9607
    Pojawia się w:
    International Journal of Microelectronics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Alternative interpretations of grain-size data from Quaternary deposits
    Autorzy:
    Mycielska-Dowgiałło, Elżbieta
    Ludwikowska-Kędzia, Małgorzata
    Powiązania:
    https://bibliotekanauki.pl/articles/94466.pdf
    Data publikacji:
    2011
    Wydawca:
    Uniwersytet im. Adama Mickiewicza w Poznaniu
    Tematy:
    Quaternary deposits
    grain-size distribution
    cumulative curve
    frequency curves
    textural parameters
    osady czwartorzędowe
    skład granulometryczny
    parametry teksturale
    Opis:
    Several possibilities to present and to interpret the results of granulometric analyses of Quaternary fluvial, aeolian, glacial and wash-out slope deposits were investigated. Attention is paid particularly to the cumulative curves at a probability scale and the frequency curves, and it is shown how these curves can help to determine the sedimentary environment. The inclination of the cumulative curves in the part of the maximum proportion of a particular grain size appears significant. It appears possible to obtain information on the density and dynamics of the transporting medium from the course of the cumulative curves (inclination and spread of grain size). The examination of textural parameters allows to draw regression lines characteristic of both deposits from various sedimentary environments and deposits from one single environment but with different histories as to their transport dynamics.
    Źródło:
    Geologos; 2011, 17, 4; 189-203
    1426-8981
    2080-6574
    Pojawia się w:
    Geologos
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-8 z 8

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