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Performance analysis of client-server software systems through bounds on task throughputs is presented. The upper and lower bounds (performance guarantee) are both independent of any assumptions about the stochastic behavior of the client tasks, and make only weak assumptions on the server. The analytic expressions for the bounds however, are not in closed form. A new technique based on interval arithmetic...
The performance of a software design specified in UML is analyzed to estimate the delays, throughputs and resource utilizations, and such measures as the probability of missing a target response time. A case study that defines scenarios for the important responses is described by using the recently adopted UML Profile for Schedulability, Performance and Time. Using the Profile, stereotypes and annotations...
A second-order non-linear model of steel refining in an electric arc furnace is formulated and optimized. Iterative computation using steepest descent shows the existence of an optimal singular arc, which is then found more precisely by directly applying necessary conditions for such an arc. When a soft (penalty-function) constraint on state is replaced by a hard constraint, a state-constrained arc...
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