Advances in Bio-inspired Computing for Combinatorial by Camelia-Mihaela Pintea PDF

By Camelia-Mihaela Pintea

ISBN-10: 3642401783

ISBN-13: 9783642401787

ISBN-10: 3642401791

ISBN-13: 9783642401794

"Advances in Bio-inspired Combinatorial Optimization difficulties" illustrates a number of fresh bio-inspired effective algorithms for fixing NP-hard problems.

Theoretical bio-inspired ideas and versions, particularly for brokers, ants and digital robots are defined. Large-scale optimization difficulties, for instance: the Generalized touring Salesman challenge and the Railway touring Salesman challenge, are solved and their effects are discussed.

Some of the most techniques and versions defined during this publication are: internal rule to lead ant seek - a contemporary version in ant optimization, heterogeneous delicate ants; digital delicate robots; ant-based thoughts for static and dynamic routing difficulties; stigmergic collaborative brokers and studying delicate agents.

This monograph comes in handy for researchers, scholars and every person drawn to the new common computing frameworks. The reader is presumed to have wisdom of combinatorial optimization, graph concept, algorithms and programming. The ebook may still moreover enable readers to procure rules, suggestions and types to take advantage of and strengthen new software program for fixing complicated real-life problems.

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Additional info for Advances in Bio-inspired Computing for Combinatorial Optimization Problems

Example text

D represents the weighted average of the two solutions ((0,0,0) is of higher quality) and τ will be shifted towards d [17]. 5 N P-hard Problems Addressed In the following, some N P-hard problem used are described. Traveling Salesman Problem The Traveling salesman problem (TSP) [183] is a well-known problem among computer scientists and mathematicians. The task basically consists of finding the shortest tour between a number of nodes, visiting every node exactly once. Traveling Salesman Problem (TSP) became popular as a prototype for a class of problems called N P-hard [241].

A stagnation situation have to be avoided. A way to avoid stagnation is to influence the probabilities for choosing the next solution component, depending directly on the pheromone trails and the heuristic information. MAX − MIN imposes explicit limits on the minimum and maximum pheromone trails after each iteration. The maximum pheromone trail, max, is set to an estimate of the asymptotically maximum value. To determine reasonable values for min the following assumptions [259] are made. • • The best solutions are found shortly before search stagnation occurs.

The approximation error in data is the discrepancy between an exact value and some approximation to it. error. 3. The absolute error is the magnitude of the difference between the exact value and the approximation. Given a value v and its approximation va pprox, the absolute error is = |v − vapprox |, where the vertical bars denote the absolute value. 4. The relative error is the absolute error divided by the magnitude of the exact value. For v = 0 the relative error is η= |v − vapprox | = . 5. The percent error is the relative error expressed in terms of percent.

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Advances in Bio-inspired Computing for Combinatorial Optimization Problems by Camelia-Mihaela Pintea

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