نتایج جستجو برای: accelerator parameter

تعداد نتایج: 231161  

Journal: :bulletin of the iranian mathematical society 2011
m. khanehgir m. janfada a. niknam

Journal: :Physics Reports 2007

Journal: :Nature Reviews Physics 2020

Journal: :Europhysics News 1991

Journal: :Plasma 2023

In this paper, we consider the acceleration of plasma fluxes in crossed electromagnetic fields. The possible technical approach to a prospective accelerator is discussed. A simple hydrodynamic model describing dynamics ring these fields proposed. Based on model, estimations basic characteristics for accelerated flux are calculated typical experimental conditions.

Journal: :Physics Bulletin 1974

Journal: :Psychological science 2016
Robert M G Reinhart Laura J McClenahan Geoffrey F Woodman

How do people get attention to operate at peak efficiency in high-pressure situations? We tested the hypothesis that the general mechanism that allows this is the maintenance of multiple target representations in working and long-term memory. We recorded subjects' event-related potentials (ERPs) indexing the working memory and long-term memory representations used to control attention while per...

Journal: :iranian journal of medical physics 0
m. t. bahreyni toosi professor, medical physics research center, bu-ali research institute, mashhad university of medical sciences, mashhad, iran. m. momen nezhad ph.d. student in medical physics, mashhad university of medical sciences, mashhad, iran h. saberi ph.d. student in medical physics, mashhad university of medical sciences, mashhad, iran m. h. bahreyni toosi professor, medical physics research center, bu-ali research institute, mashhad university of medical sciences, mashhad, iran. a. hashemian assistant professor, medical physics research center, bu-ali research institute, mashhad university of medical sciences, mashhad, iran. r. salek assistant professor, radiation oncology dept., imam reza hospital, mashhad university of medical sciences, mashhad, iran.

ntroduction:  monte  carlo  simulation  is  the  most  accurate  method  of  simulating  radiation  transport  and  predicting doses at different points of interest in radiotherapy. a great advantage of the monte carlo method  compared  to  the  deterministic  methods  is  the  ability  to  deal  accurately  with  any  complex  geometry.  its  disadvantage is the extremely long computing time r...

Journal: :Symmetry 2021

Anderson(m0) extrapolation, an accelerator to a fixed-point iteration, stores m0+1 prior evaluations of the iteration and computes linear combination those as new iteration. The computational cost acceleration becomes expensive with parameter m0 increasing, thus is common choice in most practice. In this paper, aim improving computations PageRank problems, method was developed by applying Ander...

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