There exist an enormous variety of activities in the everyday world which can usefully be described as systems, from actual physical systems such as chemical processing plants to theoretical entities such as economic models. The efficient operation of these systems often requires an attempt at the optimization of various indices which measure the performance of the system. Sometimes these indices are quantified and represented as algebraic variables. Then values for these variables must be found which maximize the gain or profit of the system and minimize the waste or loss. The variables are assumed to be dependent upon a number of factors. Some of these factors are often under the control, or partial control, of the analyst responsible for the performance of the system.
KeywordsMicrowave Transportation Arsenic Production Line Gallium
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