Fuzzy sets 10 Learning systems 10 Calculations 8 Genetic algorithms 8 Knowledge based systems 8 Linguistics 8 Selection Rules 8 Hierarchical knowledge base 6 Hierarchical systems 6 Mathematical models 6 Molecules 6 Optimization 6 Friedel sum rule 5 Transport cross-section 5 Valence electron 5 Zinc 5 morphology 5 ASSEMBLY RULES 4 Ab initio calculations 4 Algorithms 4 Association rules 4 Butternut 4 Cell walls 4 Chemical compositions 4 Commerce 4 Computer circuits 4 Cucurbita moschata 4 Fuzzy rule-based systems 4 Galacturonic acids 4 Hemicellulase 4