نتایج جستجو برای: mont carlo simulation

تعداد نتایج: 601321  

2017
David J. Wilber Konstantinos C. Siontis Peter A. Noseworthy Pierre Jais Rungroj Krittayaphong Bernard J. Gersh Mark E. Josephson

Konstantinos C. Siontis, MD, John P.A. Ioannidis, MD, DSC, George D. Katritsis, MB, CHB, BSC, Peter A. Noseworthy, MD, Douglas L. Packer, MD, John D. Hummel, MD, Pierre Jais, MD, PHD, Rungroj Krittayaphong, MD, Llius Mont, MD, PHD, Carlos A. Morillo, MD, Jens Cosedis Nielsen, MD, Hakan Oral, MD, Carlo Pappone, MD, PHD, Vincenzo Santinelli, MD, Rukshen Weerasooriya, MBBS, David J. Wilber, MD, Be...

Journal: :iranian journal of nuclear medicine 2012
pablo aguiar charalampos tsoumpas albert cot javier pavía domènec ros

introduction: the key characteristics of positron emission tomography (pet) are its quantitative capability and its sensitivity, which allow the in vivo imaging of biochemical interactions with small amounts of tracer concentrations. therefore, accurate quantification is important. however, it can be sensitive to several physical factors. the aim of this investigation is the assessment of the e...

Journal: :journal of physical & theoretical chemistry 2009
m. monajjemi a. r. oliaey

the determination of gyration radius is a strong research for configuration of a macromolecule. italso reflects molecular compactness shape. in this work, to characterize the behavior of theprotein, we observe quantities such as the radius of gyration and the average energy. we studiedthe changes of these factors as a function of temperature for acetylcholine receptor protein in gasphase with n...

Fazel Zarandi, M. H., Samimi , Y. ,

 Shewhart charts are the main tools for statistical process control. They are used for detecting assignable causes which affect quality of process output. From them, X and MR charts are two univariate control charts for monitoring mean and variation of measurable quality characteristics. The main drawbacks of these charts are: weakness of X chart against non-normal distribution of process data,...

Journal: :iranian journal of medical physics 0
mohammad taghi bahreyni toossi professor, medical physics research center, bu-ali research institute, mashhad university of medical sciences, mashhad, iran mehdi momen nezhad ph.d., linear accelerator dept., imam reza hospital, mashhad university of medical sciences, mashhad, iran seyed mohammad hashemi m.sc., medical physics research center, mashhad university of medical sciences, mashhad, iran

introduction: in recent decades, several monte carlo codes have been introduced for research and medical applications. these methods provide both accurate and detailed calculation of particle transport from linear accelerators. the main drawback of monte carlo techniques is the extremely long computing time that is required in order to obtain a dose distribution with good statistical accuracy. ...

Wind energy penetration in power system has been increased very fast and large amount of capitals invested for wind farms all around the world. Meanwhile, in power systems with wind turbine generators (WTGs), the value of Available transfer capability (ATC) is influenced by the probabilistic nature of the wind power. The Mont Carlo Simulation (MCS) is the most common method to model the uncerta...

Journal: :Iet Generation Transmission & Distribution 2021

The optimal multi-objective operation of microgrids with distributed generations and thermal block based on the energy management system is presented. In block, combined heat power boiler storage supply load thermal. Therefore, proposed strategy minimises three objectives an microgrid's operation, that is, cost, loss voltage deviation functions. Also, it subject to AC flow equations, limits con...

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 radiation research 0
m.b. tavakoli department of medical physics and medical engineering, school of medicine, isfahan university of medical sciences, isfahan, iran d. shahbazi-gahrouei department of medical physics and medical engineering, school of medicine, isfahan university of medical sciences, isfahan, iran m. hosseinpour department of medical physics and medical engineering, school of medicine, isfahan university of medical sciences, isfahan, iran

background: for an effective treatment planning in brachytherapy, it is necessary to know the accurate source dosimetric information such as air kerma strength, exposure rate constant, dose rate constant and redial dose distribution. the usual method to determine these factors is thermo luminescent dosimeter (tld) dosimetry. nowadays, another more accurate method is known to be the monte carlo ...

Journal: :journal of industrial engineering, international 2005
s.s hashemin s.m.t fatemi ghomi

this paper proposes a hybrid method to find cumulative distribution function (cdf) of completion time of gert-type networks (gtn) which have no loop and have only exclusive-or nodes. proposed method is cre-ated by combining an analytical transformation with gaussian quadrature formula. also the combined crude monte carlo simulation and combined conditional monte carlo simulation are developed a...

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