Results 31 to 40 of about 1,239,268 (312)

Spectral density estimation for symmetric stable p-adic processes

Statistica, 2013
Applications of p-adic numbers ar beming increasingly important espcially in the field of applied physics. The objective of this work is to study the estimation of the spectral of p-adic stable processes. An estimator formed by a smoothing periodogram is
Rachid Sabre
doaj   +1 more source

Evaluating the Roles of Rainout and Post-Condensation Processes in a Landfalling Atmospheric River with Stable Isotopes in Precipitation and Water Vapor

Atmosphere, 2019
Atmospheric rivers (ARs), and frontal systems more broadly, tend to exhibit prominent “V„ shapes in time series of stable isotopes in precipitation.
Hari T. Mix, Sean P. Reilly, Andrew Martin, Gavin Cornwell   +3 more
doaj   +1 more source

On the Fractional Wave Equation

Mathematics, 2020
In this paper we study the time-fractional wave equation of order 1
Francesco Iafrate, Enzo Orsingher
doaj   +1 more source

Comparative Study of Nitrogen Cycling Between a Bay With Riverine Input and a Bay Without Riverine Input, Inferred From Stable Isotopes

Frontiers in Marine Science, 2022
The eutrophication degree in the coastal bay has been increasing significantly for the past years, due to the increasing nutrient discharge. However, the factors controlling sources and nitrogen (N) cycling in the different types of bays are still poorly
Chunqing Chen, Qibin Lao, Qibin Lao, Youli Shen, Guangzhe Jin, Guangzhe Jin, Guangzhe Jin, Fajin Chen, Fajin Chen, Fajin Chen, Qizhong Su, Xuetie Lei, Xin Zhou, Xuan Lu, Qingmei Zhu, Qingmei Zhu, Qingmei Zhu, Guoqiang Liu, Guoqiang Liu   +18 more
doaj   +1 more source

Particle filtering with alpha-stable distributions [PDF]

, 2005
In this paper we introduce a novel sequential Monte Carlo technique, which is based on the family of symmetric alpha- stable (SAS) distributions.
D. Bull, N. Canagarajah, P. Brasnett, Canagarajah, N., Achim, A., Bull, D., L. Mihaylova, Mihaylova, L., Brasnett, P., A. Achim   +9 more
core   +1 more source

A porewater-based stable isotope approach for the investigation of subsurface hydrological processes [PDF]

Hydrology and Earth System Sciences, 2012
Predicting and understanding subsurface flowpaths is still a crucial issue in hydrological research. We present an experimental approach to reveal present and past subsurface flowpaths of water in the unsaturated and saturated zone.
J. Garvelmann, C. Külls, M. Weiler
doaj   +1 more source

Hadamard-Type Fractional Heat Equations and Ultra-Slow Diffusions

Fractal and Fractional, 2021
In this paper, we study diffusion equations involving Hadamard-type time-fractional derivatives related to ultra-slow random models. We start our analysis using the abstract fractional Cauchy problem, replacing the classical time derivative with the ...
Alessandro De Gregorio, Roberto Garra
doaj   +1 more source

Insertion and deletion tolerance of point processes [PDF]

, 2013
We develop a theory of insertion and deletion tolerance for point processes. A process is insertion-tolerant if adding a suitably chosen random point results in a point process that is absolutely continuous in law with respect to the original process ...
Holroyd, Alexander E., Holroyd, AE, Soo, Terry, Soo, T   +3 more
core   +1 more source

Approximating Multivariate Tempered Stable Processes [PDF]

Journal of Applied Probability, 2012
We give a simple method to approximate multidimensional exponentially tempered stable processes and show that the approximating process converges in the Skorokhod topology to the tempered process. The approximation is based on the generation of a random angle and a random variable with a lower-dimensional Lévy measure.
Baeumer, Boris, Kovács, Mihály
openaire   +2 more sources

On the reducibility of affine models with dependent Lévy factors

Modern Stochastics: Theory and Applications
The paper is devoted to the study of the short rate equation of the form \[ \text{d}R(t)=F(R(t))\text{d}t+{\sum \limits_{i=1}^{d}}{G_{i}}(R(t-))\text{d}{Z_{i}}(t),\hspace{1em}R(0)={R_{0}}\ge 0,\hspace{3.33333pt}t\gt 0,\] with deterministic functions
Michał Barski, Rafał Łochowski
doaj   +1 more source