نتایج جستجو برای: kinetic monte carlo simulation
تعداد نتایج: 680618 فیلتر نتایج به سال:
Introduction: Monte Carlo calculation method is considered to be the most accurate method for dose calculation in radiotherapy. The purpose of this research is comparison between 6 MV Primus LINAC simulation output with commissioning data using EGSnrc and build a Monte Carlo geometry of 6 MV Primus LINAC as realistically as possible. The BEAMnrc and DOSXYZnrc (EGSnrc package) M...
Article history: Received 27 May 2015 Received in revised form 17 June 2015 Accepted 18 June 2015 Available online xxxx
we compare two approaches for a markovian model in flexible manufacturing systems (fmss) using monte carlo simulation. the model which is a development of fazlollahtabar and saidi-mehrabad (2013), considers two features of automated flexible manufacturing systems equipped with automated guided vehicle (agv) namely, the reliability of machines and the reliability of agvs in a multiple agv jobsho...
background: iodine brachytherapy sources with low photon energies have been widely used in treating cancerous tumors. dosimetric parameters of brachytherapy sources should be determined according to aapm tg-43u1 recommendations before clinical use. monte carlo codes are reliable tools in calculation of these parameters for brachytherapy sources. materials and methods: dosimetric parameters (dos...
C. Hin,1,2 B. D. Wirth,1 and J. B. Neaton3 1Department of Nuclear Engineering, University of California, Berkeley, California 94720-1730, USA 2Department of Materials Sciences and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139-4307, USA 3Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, California 94720-1730, USA Received 12 February 2009; r...
background: an effective method for management of large and bulky malignant tumors. this treatment modality is also known as specially fractionated radiation therapy (sfrt). in this treatment technique a grid block converted the open radiation field into a series of pencil beams. dosimetric characteristics of an external beam grid radiation field have been investigated using experimental and mo...
The increasing penetration of renewable energy results in changing the traditional power system planning and operation tools. As the generated power by the renewable energy resources are probabilistically changed, the certain power system analysis tolls cannot be applied in this case. Probabilistic optimal power flow is one of the most useful tools regarding the power system analysis in presen...
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...
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...
background: megavoltage beams used in radiotherapy are contaminated with secondary electrons. different parts of linac head and air above patient act as a source of this contamination. this contamination can increase damage to skin and subcutaneous tissue during radiotherapy. monte carlo simulation is an accurate method for dose calculation in medical dosimetry and has an important role in opt...
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