Results 1 to 10 of about 30,228 (96)

Application of Statistical Distributions to PM10 Concentrations: Van, Türkiye

open access: yesYüzüncü Yıl Üniversitesi Sosyal Bilimler Enstitüsü Dergisi, 2023
Air pollution is one of the most serious environmental pollution problems that adversely affect human health and the environment. Industrializing and frequent use of low-quality coals for heating purposes and incorrect combustion techniques may cause ...
Kübra Bağcı
doaj   +1 more source

Alibeyköy Havzası İçin En Uygun Taşkın Olasılık Dağılımı

open access: yesALKÜ Fen Bilimleri Dergisi, 2023
Determination of peak flow rates is crucial in reducing the economic and social impact of flood. Therefore, the investigation of various methods for estimating flood is of paramount importance.
Mehmet Dikici   +2 more
semanticscholar   +1 more source

Gravitational waves induced by scalar perturbations with a lognormal peak [PDF]

open access: yesJournal of Cosmology and Astroparticle Physics, 2020
We study the stochastic gravitational wave (GW) background induced by the primordial scalar perturbation with the spectrum having a lognormal peak of width Δ at k=k*. We derive an analytical formula for the GW spectrum ΩGW for both narrow (Δ≪1) and broad
Shi Pi, Misao Sasaki
semanticscholar   +1 more source

A dynamical Gaussian, lognormal, and reverse lognormal Kalman filter

open access: yesQuarterly Journal of the Royal Meteorological Society, 2023
We derive a generalization of the Kalman filter that allows for non‐Gaussian background and observation errors. The Gaussian assumption is replaced by considering that the errors come from a mixed distribution of Gaussian, lognormal, and reverse ...
Senne Van Loon, S. J. Fletcher
semanticscholar   +1 more source

Studies in Astronomical Time-series Analysis. VII. An Enquiry Concerning Nonlinearity, the rms–Mean Flux Relation, and Lognormal Flux Distributions [PDF]

open access: yesAstrophysical Journal, 2020
A broad and widely used class of stationary, linear, additive time-series models can have statistical properties that many authors have asserted imply that the underlying process must be nonlinear, nonstationary, multiplicative, or inconsistent with shot
J. Scargle
semanticscholar   +1 more source

Lognormal and Mixed Gaussian-Lognormal Kalman Filters

open access: yesMonthly Weather Review, 2022
In this paper we shall present the derivation of two new forms of the Kalman filter equations; the first is for a pure lognormally distributed random variable, while the second set of Kalman filter equations will be for a combination of Gaussian and ...
S. Fletcher   +8 more
semanticscholar   +1 more source

iDeLog: Iterative Dual Spatial and Kinematic Extraction of Sigma-Lognormal Parameters [PDF]

open access: yesIEEE Transactions on Pattern Analysis and Machine Intelligence, 2020
The Kinematic Theory of rapid movements and its associated Sigma-Lognormal model have been extensively used in a large variety of applications. While the physical and biological meaning of the model have been widely tested and validated for rapid ...
Miguel A. Ferrer   +3 more
semanticscholar   +1 more source

The Poisson-lognormal model as a versatile framework for the joint analysis of species abundances

open access: yesbioRxiv, 2020
Joint Species Abundance Models (JSDM) provide a general multivariate framework to study the joint abundances of all species from a community. JSDM account for both structuring factors (environmental characteristics or gradients, such as habitat type or ...
J. Chiquet, M. Mariadassou, S. Robin
semanticscholar   +1 more source

Rüzgar hız dağılımı modelinin yusufcuk algoritması ile parametre tahminlemesi] [PDF]

open access: yes, 2023
In order to meet the increasing energy demand and to solve environmental problems, the interest in renewable energy sources continues with technology development studies and economic investments.
Aygün, Hilmi, Köse, Bayram, Pak, Semih
core   +1 more source

Human behavior and lognormal distribution. A kinetic description [PDF]

open access: yesMathematical Models and Methods in Applied Sciences, 2018
In recent years, it has been increasing evidence that lognormal distributions are widespread in physical and biological sciences, as well as in various phenomena of economics and social sciences.
Stefano Gualandi, G. Toscani
semanticscholar   +1 more source

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