By Dr. Alakananda Bhattacharya, Prof. Dr. Amit Konar, Prof. Dr. Ajit K. Mandal (auth.)

The ebook Parallel and dispensed common sense Programming offers a transparent advent to parallel and dispensed method of good judgment programming. It examines the prevailing versions of dispensed common sense programming, analyses the professionals and cons of those types, and proposes an alternate framework for dispensed common sense programming utilizing prolonged Petri nets. The hardwired cognizance of the Petri web dependent framework is gifted intimately. rules of mapping of a common sense application directly to the proposed framework also are defined. ultimately, the publication makes an attempt to discover the scope of Petri internet types in designing deductive database machines of the following generation.

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Hints: From the resolution principle, we can see that after unifying Q1 and Q2, the resolvent (P ∨ R)[S] = A (a, b) ∨ C (b, a). ] 2. Unify the following two predicates: i) P1 = Loves (X, son-of (X)) and P2 = Loves (mam, Y). ii) P1 = P(a, X, f(g(X))) and P2 = P(Z, f(Z), f(U)). Parallel and Distributed Logic Programming 41 [Hints: i) Here, these two predicates can be unified as follows: P = P1 = P2 = Loves (mam, son-of (mam)) where the substitution is given by S = {mam/X, son-of(mam)/Y}. ] 3. Given the logic program and the query.

18: The Petri net for a given logic program AND-parallelism using Petri net The literals present in the body part of a clause are referred to as AND-literals. During resolution the AND-literals of a given clause may be searched against the literals present in the heads of other available clauses. In AND-parallelism the binding of terms AND-literals takes place concurrently with those of the literals present in the heads of other clauses. The example below illustrates the concept of AND-parallelism.

In order to simulate the dynamic behaviour of a system, a state or marking in a Petri net is changed according to the following transition firing rules: 1) A transition trj is enabled if each input place pk of the transition is marked with at least w(pk, trj) tokens, where w(pk, trj) denotes the weight of the arc from pk to trj. 2) An enabled transition fires if the event described by the transition and its input/ output places actually takes place. 3) A firing of an enabled transition trj removes w(pk, trj) tokens from each input place pk of trj, and adds w(trj, pl) tokens to each output place pl of trj, where w(trj, pl) is the weight of the arc from trj to pl.

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