Adaptive importance sampling (AIS) methods are increasingly used for the approximation of distributions and related intractable integrals in context Bayesian inference. Population Monte Carlo (PMC) algorithms a subclass AIS methods, widely due to their ease adaptation. In this paper, we propose novel algorithm that exploits benefits PMC framework includes more efficient adaptive mechanisms, exp...

Any search or sampling algorithm for solution of inverse problems needs guidance to be efficient. Many algorithms collect and apply information about the problem on fly, much improvement has been made in this way. However, as a consequence No-Free-Lunch Theorem, only way we can ensure significantly better performance is build possible. In special case Markov Chain Monte Carlo (MCMC) review how ...

Since its first description fifty years ago, the Metropolis Monte Carlo method has been used in a variety of different ways for the simulation of continuum quantum many-body systems. This paper will consider some of the generalizations of the Metropolis algorithm employed in quantum Monte Carlo: Variational Monte Carlo, dynamical methods for projector monte carlo (i.e. diffusion Monte Carlo wit...

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...

introduction: due to the large number of pet systems available in the market, it is not very easy to decide about the scanner of choice. conducting a research in order to compare all different pet scanners is very time consuming and expensive and practically impossible. however, such comparison may be conducted using pet simulators. in this study, the performance of 6 different pet scanners in ...

background: recent pre-clinical and clinical studies indicate that irradiation in the dose range of 15 to 30 gy can reduce rate of restenosis in patients who have undergone an angioplasty. the use of filled balloon with radioactive solution was proposed as one of the possible intravascular irradiation techniques. materials and methods: the monte carlo n-particle transport code (mcnp4b) was used...