نتایج جستجو برای: monte carlo analysis

تعداد نتایج: 2876784  

Journal: :international journal of communications and information technology 2011
m. soroosh m. a. mansouri-birjandi

in this paper, we calculate electron and hole impactionization coefficients in in0.52al0.48as using a monte carlo modelwhich has two valleys and two bands for electrons and holesrespectively. also, we calculate multiplication factor for electronand hole initiated multiplication regimes and breakdown voltagein in0.52al0.48as pin avalanche photodiodes. to validate themodel, we compare our simulat...

Journal: :iranian journal of chemistry and chemical engineering (ijcce) 2012
pejman ganjeh-anzabi vahid hadadi-asl mehd salami-kaljahi hossein roghani-mamaqani

in this work, based on experimental observations and exact theoretical predictions, the kinetic scheme of raft polymerization is extended to a wider range of reactions such as irreversible intermediate radical terminations and reversible transfer reactions. the reactions which have been labeled as kinetic scheme are the more probable existing reactions as the theoretical point of view. the deta...

Journal: :iranian journal of radiation research 0
gh. geraily department of medical physics, tehran university of medical science, tehran, iran m. mirzapour department of electronic, east tehran branch, islamic azad university, tehran, iran s.r. mahdavi department of medical physics, tehran university of medical science, tehran, iran m. allahverdi department of medical physics, tehran university of medical science, tehran, iran a. mostaar department of biomedical engineering and medical physics, shahid beheshti university of medical science, tehran, iran m. masoudifar department of radiation oncology, mahak hospital, tehran, iran

background: physical wedges are still widely used as beam modifiers in external beam radiotherapy. however the presence of them in the beam trace may cause beam hardening which may not be considered in many treatment planning systems. the aim of this study is to investigate the beam hardening effect generated by physical wedges via different beam quality indexes as photon spectrum, half value l...

2015
George Papamakarios Iain Murray

A generative model’s partition function is typically expressed as an intractable multi-dimensional integral, whose approximation presents a challenge to numerical and Monte Carlo integration. In this work, we propose a new estimation method for intractable partition functions, based on distilling an intractable generative model into a tractable approximation thereof, and using the latter for pr...

2000
K. Binder E. Luijten

Two Monte Carlo studies of critical behavior in ferromagnetic Ising models are described: the first one deals with the crossover from the Ising class to the mean field class, when the interaction range increases. The second study deals with the finite size behavior at dimensionalities above the marginal dimension where Landau theory applies. The numerical results are compared to pertinent theor...

Journal: :J. Comput. Physics 2007
Jeffery D. Densmore Todd J. Urbatsch Thomas M. Evans Michael W. Buksas

Discrete Diffusion Monte Carlo (DDMC) is a hybrid transport-diffusion method for Monte Carlo simulations in diffusive media. In DDMC, particles take discrete steps between spatial cells according to a discretized diffusion equation. Thus, DDMC produces accurate solutions while increasing the efficiency of the Monte Carlo calculation. In this paper, we extend previously developed DDMC techniques...

2002
Matias Eklöf

This paper investigates the possibilities to estimate a life-cycle consumption model under income uncertainty using separate consumption and wealth data. The econometric approach is to match observed average consumption-age and wealth-age profiles with their simulated counterparts in a simulated method of moments framework. In a Monte Carlo analysis, we create a synthetic population of utility ...

2003
Alan E. Nahum

Monte Carlo simulation of radiation transport is a very powerful technique. There are basically no exact analytical solutions to the Boltzmann Transport equation. Even the "straightforward" situation (in radiotherapy) of an electron beam depth-dose distribution in water proves to be too difficult for analytical methods without making gross approximations such as ignoring energy-loss straggling,...

2000
Ignacio Díaz-Emparanza

In this paper we will study the relationship between the number of replications and the accuracy of the estimated quantiles of a distribution obtained by simulation. A method for testing hypotheses on the quantiles of a theoretical distribution using the simulated distribution is proposed, as well as a method to check the hypothesis of consistency of a test.

2009
Hamza Alkhatib Ingo Neumann Hansjörg Kutterer

 The evaluation of uncertainties according to the „„Guide to the Expression of Uncertainty in Measurement‟‟ is presented in this study based on a novel Fuzzy-randomvariables approach. Whereas the classically proposed methods like Monte Carlo techniques treat all uncertainties as having a random nature, the fuzzy technique distinguishes between aleatoric and epistemic uncertainties. The aleator...

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