Collect. Czech. Chem. Commun. 1993, 58, 1861-1873

An Integration of Quantitative and Qualitative Knowledge in Process Engineering

Martin Kvapilíka and Mirko Dohnalb

a Department of Automation, Technical University, 612 00 Brno, Czech Republic
b Department of Chemical Engineering, Technical University, 616 69 Brno, Czech Republic


A value of a qualitative variable (derivative) can be positive, negative, or zero. Qualitative models are such models which contain qualitative variables only. Some parameters of an industrial process are measurable. Their time records are available. The main goal of this paper is to predict qualitative behaviour of all those variables which are not measured (cannot be measured) using time records of all such variables which are measured. Two case studies (damped oscillation, three reactor system) are given in details.