Peter Kihato

Profit based unit commitment using evolutionary particle swarm optimization

The profit based unit commitment (PBUC) problem determines an optimal unit commitment schedule for a generation company (GENCO) participating in a deregulated environment with the aim of maximizing its profit. This is done using predicted prices of energy and other ancillary services including supply of reserve power. Several techniques have been proposed in literature to solve the optimization problem and this paper applies the evolutionary particle swarm optimization (EPSO) algorithm. Simulation results carried out in MATLAB software for a test GENCO with 10 thermal units shows that the EPSO algorithm provides better solutions and has better convergence characteristics than the classic PSO algorithm.

Age clustering approach to metabolic syndrome using spherical and torus SOM

One of the threatening trends of human health in recent years has been metabolic syndrome. Metabolic syndrome is a cluster of conditions that occur together resulting in simultaneous disorders related to ones metabolism. This paper analyses the effect age clustering has on the syndrome trends using SOM. It gives an analysis and visualization of the contributing parameter(s) to the syndrome in each cluster and then projects the overall effect the clustered SOM analysis has on the entire group of examinees. Inter-relation of the input parameters and the severity of their contribution to the syndrome risks are investigated.

Effect of motor-cage temperature on motor speed sensing characteristics of magnetostrictive amorphous wire

Magnetostsrictive amorphous wires have been shown to possess various important sensing characteristics. Previously we presented results of speed sensing of induction motor using the amorphous wire, in which the speed sensing capability was seen to match that of conventional speed sensors such as tachometer. However, one concern was the fact that the properties of amorphous wire change when exposed to certain temperature ranges for a long time (as would be expected to occur inside the motor cage) in a process termed relaxation. In the present work we have shown that the amorphous wire sensing characteristics are completely lost when the wire is exposed to elevated motor-cage temperatures. Furthermore, we have suggested and tested a simple, but effective remedy to this problem.