Qualitative-identification-enhanced method of forming qualitative trends from the measurement stream
Zhu Liu · Kongzhi yu juece · 2002
Anewmethodispresentedtoobtain the qualitative trend delineated by the sequence of specialqualitativestatesforqualitative system identification. The consequent qualitative states are defined qualitatively as the triplet of the qualitative value and its first and second derivatives, which did not vary in a time interval. Thus, the procedure transforms the noisy and quantitative information into a simple, intuitive and qualitative representation, which contains important features of the original stream and facilitates the identification algorithm.