Cyclic queue models of semiconductor noise and vehicle fleet operations

Abstract

One outstanding problem of semiconductor noise is to account for the: increase in noise, as frequency decreases, even down to frequencies of less than one cycle per second. Previous work using n multiple server queue model leads to a reasonable approximation over a small range of frequencies but in under conditions for the load factor which imply a constant build-up of electronic charge. In this paper we examine a number of cyclic queue models of electron transitions which meet charge conservation requirements, in the first model electron-donor transitions take place any where in the material. In the other models, donor atoms can diffuse from an interaction region of the semiconductor: they differ in assumptions as to where in the material the interactions can occur. None of the models leads to the observed phenomena. The models are applicable ton class of problems of fleets of vehicles maintained by their own crew or by a crow available ut certain positions only or assigned additional duties.