화학공학소재연구정보센터
학회 한국화학공학회
학술대회 2007년 가을 (10/26 ~ 10/27, 한국과학기술원)
권호 13권 2호, p.1464
발표분야 공정시스템
제목 Variable Selection Strategy using Wavelet Transform for Construction of Batch Process Quality Models
초록 This work propose a two-stage variable selection strategy performed in the wavelet domain in order to extract quality-related information from batch trajectories of process variables and to build parsimonious quality estimation models. The proposed method enables the determination from historical data of the following three kinds of information that are correlated with the quality of the final product: the time stages in which product quality is predominantly determined; their frequency components, which indicate how long the stages last; and the relative importance of these time stages. This information, which can be used to develop operation control guidelines, is obtained by reconstructing the important trajectories in the time domain from the subset of wavelet coefficients selected by the proposed variable selection method.
저자 김대연1, 주영환2, 유 준3, 한종훈1
소속 1서울대, 2포항공과대, 3삼성전자
키워드 Wavelet Transform; Variable Selection; Quality Estimation
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