Classifier multi category

FIGURE 30. Branching tree arrangement of binary classifiers w for a multi category problem. 

A binary classifier produces the maximum information of 1 bit if no mistakes are made and if equal a priori probabilities are assumed for both classes. Multi category classifications can be treated in the same way by using equation (134). 

Apart from multi-level layer resist systems, conventional positive-tone resists can be classified into two categories one-component and two-component systems. Classical examples of the former systems are polyfmethyl methacrylate), and poly (butene-1-sulfone) (2,3). Typical examples of the latter system are AZ-type photoresists, which are mixtures of cresol-formaldehyde-Novolak resins and a photoactive compound acting as a dissolution inhibitor... 

The Chemistry-Physics Department has administered a common, cumulative final examination to aU sections of General Chemistry 1 and 11 for over 20 years. Questions on those examinations have been classified in four levels of chemical skills (i) recognition of a chemical concept, (ii) direct qualitative apphcation of a chemical concept, (iii) direct quantitative application of a chemical concept, and (iv) multi-step reasoning, either qualitative or quantitative, in applying a chemical concept. The results have consistently shown a much poorer performance in category (iv) than in the other categories, a result that relates to the level of cumulative skill development. 

Polymer-based multi-component systems can be classified into two categories one is a miscible system, in which polymers are homogeneously mixed with other molecules the other one is a composite system, in which polymers are not mixed with other molecules, except at interfaces. 

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