Results 11 to 20 of about 247,097 (248)

The Probabilistic Analysis of Drought Severity- Duration in North Khorasan Province using Copula Functions [PDF]

open access: yesپژوهش‌های آبخیزداری, 2023
Introduction and Objective Droughts have a set of negative environmental, social and economic effects in a region or country. Using a monthly index and its analysis that, in addition to precipitation values, takes into account the effect of evaporation ...
Mehdi Teimouri   +2 more
doaj   +1 more source

Solutions of the Two-Dimensional Hubbard Model: Benchmarks and Results from a Wide Range of Numerical Algorithms

open access: yesPhysical Review X, 2015
Numerical results for ground-state and excited-state properties (energies, double occupancies, and Matsubara-axis self-energies) of the single-orbital Hubbard model on a two-dimensional square lattice are presented, in order to provide an assessment of ...
J. P. F. LeBlanc   +24 more
doaj   +1 more source

A numerical algorithm for fully nonlinear HJB equations: an approach by control randomization [PDF]

open access: yes, 2013
We propose a probabilistic numerical algorithm to solve Backward Stochastic Differential Equations (BSDEs) with nonnegative jumps, a class of BSDEs introduced in [9] for representing fully nonlinear HJB equations.
Kharroubi, Idris   +2 more
core   +6 more sources

New density estimation methods for charged particle beams with applications to microbunching instability

open access: yesPhysical Review Special Topics. Accelerators and Beams, 2011
In this paper we discuss representations of charge particle densities in particle-in-cell simulations, analyze the sources and profiles of the intrinsic numerical noise, and present efficient methods for their removal.
Balša Terzić, Gabriele Bassi
doaj   +1 more source

Yield-Constrained Optimization Design Using Polynomial Chaos for Microwave Filters

open access: yesIEEE Access, 2021
Yield optimization aims at finding microwave filter designs with high yield under fabrication tolerance. The electromagnetic (EM) simulation-based yield optimization methods are computationally expensive because a large number of EM simulations is ...
Zhen Zhang   +4 more
doaj   +1 more source

Estimating hyperparameters and instrument parameters in regularized inversion. Illustration for SPIRE/Herschel map making [PDF]

open access: yes, 2012
We describe regularized methods for image reconstruction and focus on the question of hyperparameter and instrument parameter estimation, i.e. unsupervised and myopic problems.
Abergel, A.   +3 more
core   +11 more sources

Adaptive independent sticky MCMC algorithms

open access: yesEURASIP Journal on Advances in Signal Processing, 2018
Monte Carlo methods have become essential tools to solve complex Bayesian inference problems in different fields, such as computational statistics, machine learning, and statistical signal processing.
Luca Martino   +3 more
doaj   +1 more source

Hybrid stochastic kinetic description of two-dimensional traffic dynamics [PDF]

open access: yes, 2017
In this work we present a two-dimensional kinetic traffic model which takes into account speed changes both when vehicles interact along the road lanes and when they change lane.
Herty, Michael   +3 more
core   +2 more sources

Monte Carlo Numerical Models for Nuclear Logging Applications [PDF]

open access: yesJournal of Systemics, Cybernetics and Informatics, 2012
Nuclear logging is one of most important logging services provided by many oil service companies. The main parameters of interest are formation porosity, bulk density, and natural radiation.
Fusheng Li, Xiaogang Han
doaj  

Development of a New Low-Energy Neutron Spectrometer Using a Position-Sensitive Proportional Counter: Examination of the Response Function Considering the Spectrometer Shield [PDF]

open access: yesJournal of Radiation Protection and Research
Background Boron neutron capture therapy (BNCT) is a potential radiation therapy for treating refractory cancers. Measuring the neutron energy spectrum is important to evaluate the biological effect of BNCT.
Yu Fujiwara   +3 more
doaj   +1 more source

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