HPV vaccine has been recently added to the Iran Drug List, so decision makers need information beyond that available from RCTs to recommend funding for this vaccination. Modeling and economic studies have addressed some of those information needs. We reviewed cost effectiveness studies to find a suitable model for Iranian population to determine the potential cost effectiveness of HPV vaccine p...

In this paper we describe a two-step scheme for approximate model checking of discrete time stochastic hybrid systems. In the first step, the stochastic hybrid system is approximated by a finite state Markov chain. In the second step, the Markov chain is model checked for the desired property. In particular, we consider the probabilistic invariance property and show that, under certain regulari...

In this paper, a hybrid model of a gasification unit is presented, using linear representations and a discrete events (DES) supervisor based on automata. This supervisor chooses the best linear description at the occurrence of variations of plant’s operative conditions, to assure the best prediction performance. Performances of the proposed hybrid model are discussed. Copyright © 2005 IFAC

A hybrid system is a dynamical system reacting to continuous and discrete changes simultaneously. Many researchers have proposed modeling and verification formalisms for hybrid systems, but algorithmic verification of important properties such as safety and reachability is still an on-going research area. This paper demonstrates that a basic modeling formalism for hybrid systems, DEV&DESS is an...

The learning automata operate in unknown random environments and progressively improve their performance via a learning process. The learning automata are very useful for optimization of multi-modal functions when the function is unknown and only noise-corrupted evaluations are available. In this paper we propose a new hybrid algorithm for noisy optimization. This model is obtained by combining...

Lossy channel systems (LCS’s) are systems of finite state automata that communicate via unreliable unbounded fifo channels. We propose a new probabilistic model for these systems, where losses of messages are seen as faults occurring with some given probability, and where the internal behavior of the system remains nondeterministic, giving rise to a reactive Markov chains semantics. We then inv...

An important case of hybrid systems are the rectangular automata. First, rectangular dynamics can naturally and arbitrarily closely approximate more general, nonlinear dynamics. Second, rectangular automata are the most general type of hybrid systems for which model checking |in particular, Ltl model checking| is decidable. However, on one hand, the original proofs of decidability did not sugge...