Available online 24 December 2008

In this paper, we present preliminary results on achievables rates in half-duplex cooperative multiple access channels (CMAC). We show that the upper bound on the capacity of the half-duplex CMAC can be solved using convex optimization techniques. Under a Gaussian model, we study the maximal achievable rate by every node in the network. We propose a number of scenarios, encompassing existing an...

In de£ning the behaviour of a system, requirement speci£cations make use of a number of scenarios that are interrelated in many ways. Current approaches, even though giving directions on how to translate them into statecharts, treat each scenario separately. In this paper we propose a method of synthesizing statecharts from multiple scenarios, with respect to the relationships among them. We de...

This paper covers a massive acceleration of Monte-Carlo based pricing method for financial products and financial derivatives. The method is applicable in risk management settings, where a financial product has to be priced under a number of potential future scenarios. Instead of starting a separate nested Monte Carlo simulation for each scenario under consideration, the new method covers the u...

the importance of energy crisis and global warming necessitates presenting strategies in order to decrease the amount of emissions as well as fuel consumption in large and complex industries such as refineries and petrochemical industries. generally, refinery steam networks are regarded as units which consume fuel enormously. in this paper, the steam network of tehran oil refinery is considered...