Results 41 to 50 of about 1,338,709 (361)

A Machine Learning Based Hybrid Multi-Fidelity Multi-Level Monte Carlo Method for Uncertainty Quantification

open access: yesFrontiers in Environmental Science, 2019
This paper focuses on reducing the computational cost of the Monte Carlo method for uncertainty propagation. Recently, Multi-Fidelity Monte Carlo (MFMC) method (Ng, 2013; Peherstorfer et al., 2016) and Multi-Level Monte Carlo (MLMC) method (Müller et al.,
Nagoor Kani Jabarullah Khan   +1 more
doaj   +1 more source

The Convergence of Markov Chain Monte Carlo Methods: From the Metropolis Method to Hamiltonian Monte Carlo [PDF]

open access: yes, 2017
From its inception in the 1950s to the modern frontiers of applied statistics, Markov chain Monte Carlo has been one of the most ubiquitous and successful methods in statistical computing. The development of the method in that time has been fueled by not
M. Betancourt
semanticscholar   +1 more source

Coupled Electron Ion Monte Carlo Calculations of Atomic Hydrogen [PDF]

open access: yes, 2004
We present a new Monte Carlo method which couples Path Integral for finite temperature protons with Quantum Monte Carlo for ground state electrons, and we apply it to metallic hydrogen for pressures beyond molecular dissociation.
Ceperley, David M.   +2 more
core   +1 more source

Optimization of ground and excited state wavefunctions and van der Waals clusters [PDF]

open access: yes, 2000
A quantum Monte Carlo method is introduced to optimize excited state trial wavefunctions. The method is applied in a correlation function Monte Carlo calculation to compute ground and excited state energies of bosonic van der Waals clusters of upto seven
Andrei Mushinski   +24 more
core   +3 more sources

Monte Carlo and Quasi Monte Carlo Approach to Ulam's Method for Position Dependent Random Maps

open access: yesCommunications in Advanced Mathematical Sciences, 2020
We consider position random maps $T=\{\tau_1(x),\tau_2(x),\ldots, \tau_K(x); p_1(x),p_2(x),\ldots,p_K(x)\}$ on $I=[0, 1],$ where $\tau_k, k=1, 2, \dots, K$ is non-singular map on $[0,1]$ into $[0, 1]$ and $\{p_1(x),p_2(x),\ldots,p_K(x)\}$ is a set of
Md Shafiqul Islam
doaj   +1 more source

Modern Monte Carlo methods for efficient uncertainty quantification and propagation: A survey [PDF]

open access: yesWIREs Computational Statistics, 2020
Uncertainty quantification (UQ) includes the characterization, integration, and propagation of uncertainties that result from stochastic variations and a lack of knowledge or data in the natural world. Monte Carlo (MC) method is a sampling‐based approach
Jiaxin Zhang
semanticscholar   +1 more source

Density-matrix quantum Monte Carlo method [PDF]

open access: yes, 2013
We present a quantum Monte Carlo method capable of sampling the full density matrix of a many-particle system at finite temperature. This allows arbitrary reduced density matrix elements and expectation values of complicated nonlocal observables to be ...
N. S. Blunt   +3 more
semanticscholar   +1 more source

Uma abordagem simplificada do método Monte Carlo Quântico: da solução de integrais ao problema da distribuição eletrônica A simplified approach to the Quantum Monte Carlo method: from the solution of integrals to the electronic distribution problem

open access: yesQuímica Nova, 2008
The paper presents an introductory and general discussion on the quantum Monte Carlo methods, some fundamental algorithms, concepts and applicability. In order to introduce the quantum Monte Carlo method, preliminary concepts associated with Monte Carlo ...
Wagner Fernando Delfino Angelotti   +3 more
doaj   +1 more source

A general framework for implementing NLO calculations in shower Monte Carlo programs: the POWHEG BOX [PDF]

open access: yes, 2010
In this work we illustrate the POWHEG BOX, a general computer code framework for implementing NLO calculations in shower Monte Carlo programs according to the POWHEG method.
S. Alioli, P. Nason, C. Oleari, E. Re
semanticscholar   +1 more source

Divergence of the multilevel Monte Carlo Euler method for nonlinear stochastic differential equations

open access: yes, 2013
The Euler-Maruyama scheme is known to diverge strongly and numerically weakly when applied to nonlinear stochastic differential equations (SDEs) with superlinearly growing and globally one-sided Lipschitz continuous drift coefficients.
Hutzenthaler, Martin   +2 more
core   +1 more source

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