Gas reservoirs with low permeability (k<0.1 mD) are among the unconventional reservoirs and are commonly termed as "Tight Gas Reservoirs". In conventional gas reservoirs that have high permeability, the flow of gas is basically controlled by the reservoir permeability and it is calculated using the Darcy equation. In these reservoirs, gas flow due to gas diffusion is ignored compared to Dar...

This paper presents a Petri net-based method for deadlock control in flexible assembly systems (FAS). Instead of a process-oriented modeling method, a resource-oriented Petri net modeling method is used. A new control policy is thus formulated and proved to outperform the existing one in the literature. The deadlock problem in FAS is often more difficult since deadlock can arise from improper b...

a communication net is usually represented by a linear graph g whose branches represent channels for information flow and whose vertices represent sources, sinks and switching centers. the purpose of this paper is to show that for modeling digital communication nets, conventional use of the concepts of capacity and terminal capacity is inadequate . we will present an alternative to max-flow min...