Implementation of modal synthesis in MSC/NASTRAN is usually done using structural solution sequence based Direct Matrix Abstraction Programs, DMAPs. However, modal synthesis in MSC/NASTRAN without using structural solution based DMAPs is possible. But either method is tailored towards supporting components that have no non-linearity. Certain components, such as the solar arrays of the space sta...

In this paper, a meta-heuristic method, the Bat Algorithm, based on the echolocation behavior of bats is used to determine the optimum service rate of a queue problem. A finite buffer M/M/1 queue with N policy, multiple working vacations and Bernoulli schedule vacation interruption is considered. Under the two customers' impatient situations, balking and reneging, the...