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Interchange arguments are applied to establish the optimality of priority list policies in three problems. First, we prove that in a multi-class tandem of two M 1 queues it is always optimal in the second node to serve ...

The input profiles (trajectories) that are implemented during the operation of a semi-batch process are obtained by using the available model of the process. Since modeling error is always present, the performance could ...

In this note, we present some results concerning the stability (in Hurwitz' sense) of a family of polynomials with even and odd coefficients subject to uncoupled perturbations. It is shown that the stability of an appropriate ...

Under certain natural conditions the dynamics of large, low-mass lattice structures with a regular infrastructure are well approximated by the dynamics of continua, e.g., trusses may be modeled beam equations. Using a ...

The Problem of nonlinear filtering is studied for a class of diffusions whose statistics depend periodically on the process state and a small parameter EPSILON. The problem exhibits a homogenization property as EPSILON DOWN-ARROW.

Two types of traffic, e.g., voice and data, share a single synchronous and noisy communication channel. This situation is modeled as a system of two discrete-time queues with geometric service requirements which compete ...

We address two problems of memoryless distributed dependent observations across time and sensors. In the first problem, the observation sequence of each sensor consists of common weak signal in additive dependent noise ...

Database systems were a solution to the problem of shared access to heterogeneous files created by multiple autonomous applications. To make the data usage easier, one proposed to replace the autonomous files by a globally ...

We propose a method to compute the spectral norm distance from a given matrix A to the set of matrices having at least an eigenvalue on the imaginary axis. It is shown that the distance is one of the roots of a suitably ...

Manufacturing and Engineering processes use both large scale data and knowledge bases, and the use of expert systems in such environments has become a necessity. Expert Database Systems have evolved from conventional ...