نتایج جستجو برای: transition probability matrics
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UNLABELLED Schizophrenic patients have a high rate of smoking and cognitive deficits which may be related to a decreased number or responsiveness of nicotinic receptors in their brains. Varenicline is a partial nicotinic agonist which is effective as an antismoking drug in cigarette smokers, although concerns have been raised about potential psychiatric side-effects. We conducted a double-blind...
In the present investigation, we deal with the reliability characteristics of a repairable system consisting of two independent operating units, by incorporating the coverage factor. The probability of the successful detection, location and recovery from a failure is known as the coverage probability. The reboot delay and common cause shock failure are also considered. The times to failure of t...
The economy of Iran has witnessed a couple of booms and busts in housing prices over the period of 1981(1)-2014(4). Since the fluctuations in housing prices affect household wealth, and consequentially, total consumption, saving and even banking, it is of crucial importance to analyze the impact of such fluctuations on real economy. This study, utilizing the MSIAH -VARX model, examines booms an...
Let S be a denumerable state space and let P be a transition probability matrix on S. If a denumerable set M of nonnegative matrices is such that the sum of the matrices is equal to P , then we call M a partition of P . Let K denote the set of probability vectors on S. To every partition M of P we can associate a transition probability function PM on K defined in such a way that if p ∈ K and M ...
We consider an infinite asexual population with a mutator allele which can elevate mutation rates. With probability f, a transition from nonmutator to mutator state occurs but the reverse transition is forbidden. We find that at f=0, the population is in the state with minimum mutation rate, and at f=fc, a phase transition occurs between a mixed phase with both nonmutators and mutators and a pu...
Using a toy model Lagrangian we investigate the formation of vortices in first order phase transitions. The evolution and interactions of vacuum bubbles are also studied using both analytical approximations and a numerical simulation of scalar field dynamics. A long lived bubble wall bound state is discovered and its existence is justified by using a simplified potential for the bubble wall int...
It is well established that the phase transition between survival and extinction in spreading models with short-range interactions is generically associated with the directed percolation (DP) universality class. In many realistic spreading processes, however, interactions are long ranged and well described by Lévy flights-i.e., by a probability distribution that decays in d dimensions with dist...
Considerable attention has been paid, in recent years, to the use of networks in modeling complex real-world systems. Among the many dynamical processes involving networks, propagation processes-in which the final state can be obtained by studying the underlying network percolation properties-have raised formidable interest. In this paper, we present a bond percolation model of multitype networ...
Models undergoing a phase transition to an absorbing state weakly broken by the addition of a very low spontaneous nucleation rate are shown to exhibit hysteresis loops whose width Deltalambda depends algebraically on the ramp rate r . Analytical arguments and numerical simulations show that Deltalambda approximately r(kappa) with kappa=1(beta'+1) , where beta' is the critical exponent governin...
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