A qualitative physics based on confluences
Artificial Intelligence - Special volume on qualitative reasoning about physical systems
Qualitative analysis of MOS circuits
Artificial Intelligence - Special volume on qualitative reasoning about physical systems
Artificial Intelligence
Artificial Intelligence
The role of causal and noncausal constraints in steady-state qualitative modeling
Artificial intelligence, simulation & modeling
Using global properties for qualitative reasoning: a qualitative system theory
IJCAI'89 Proceedings of the 11th international joint conference on Artificial intelligence - Volume 2
Taming intractible branching in qualitative simulation
IJCAI'87 Proceedings of the 10th international joint conference on Artificial intelligence - Volume 2
Modeling disturbance management in anesthesia: A preliminary report
Artificial Intelligence in Medicine
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An analysis of the properties of qualitative differential equations involving feedback structures is presented. The topological interpretation of this theory serves as the basis for a simulator of qualitative differential equations, QUAF. QUAF predicts the initial trend and final state of each variable, thereby elucidating the general character of the response. The approach requires that causal differential equations replace algebraic forms derived from pseudo-steady state (moving equilibrium) assumptions. QUAF is compared to the qualitative simulator QSIM on an example involving interconnected tanks, and a significant narrowing of the number of interpretations of system behavior is observed.