Mohammad Mehdi Zahedi

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This paper deals with the concept of complete residuated lattice-valued (referred to as L-valued) finite tree automata. In this regard, we first define an L-valued regular tree language, and then we prove a necessary and sufficient condition for the regularity of an L-valued tree language. Furthermore, we generalize the pumping lemma for L-valued finite(More)
Recently, an emphasis has been placed on the content based Information Retrieval Systems (IRS). Finding documents based on content similarity using background knowledge is becoming an increasingly important task. This paper aims for two main tasks in order to high quality document retrieval; first, we present our formulation of fuzzy ontology and then, by(More)
In this paper, we consider the general fuzzy automata based on complete residuated lattice-valued (L-GFAs). We mainly discuss the relationship between the category of L-GFAs and the category of non-deterministic automata (NDAs). Specially, we show that instead of a general fuzzy automaton we can deal equivalently with a chain of non-deterministic automata.(More)