Conclusions

This book has been concerned with a wide class of uncertain systems described by traditional mathematical models and by relational knowledge representations. For the systems with different formal models of uncertainty, a uniform description of analysis and decision making problems has been presented and discussed. A special emphasis has been put on new approaches: 1.Uncertain variables and their applications.2.Learning concepts consisting in step by step knowledge validation and updating.3.Soft variables as a tool for unification and generalization of non-parametric problems.