scheduling is to determine the priorities or arrange the activities to meet the needs, limitations and certain goals. because the time is always a limited resource, all activities should be scheduled to use optimally and certainly the resource. gravitational force algorithm, like other evolutionary algorithms, is inspired by nature. the effect of the gravity on the objects reciprocally and to a...

multiple traveling salesman problem (mtsp) is one of the most popular operation research problem and is known as combinatorial optimization problems. mtsp is an extension version of the famous and widely used problem named traveling salesman problem (tsp). because of its benefices in various domains, many researchers have tried to solve that, and many methods have proposed so far. mtsp is a np-...

In this paper, a cooperative algorithm to improve the orthogonal space-timefrequency block codes (OSTFBC) in frequency selective channels for 2*1, 2*2, 4*1, 4*2 MIMO-OFDM systems, is presented. The algorithm of three node, a source node, a relay node and a destination node is formed, and is implemented in two stages. During the first stage, the destination and the relay antennas receive the sym...

A 2-club is a graph of diameter at most two. In the decision version 2-Club Cluster Edge Deletion problem, an undirected G given along with integer k≥0 as parameter, and question whether can be transformed into disjoint union 2-clubs by deleting k edges. simple fixed-parameter algorithm solves problem in O⁎(3k), decade-old improved this running to O⁎(2.74k) time via more sophisticated case anal...

This article suggests a novel chaotic Rao-2 algorithm to solve various optimal power flow (OPF) problems. The basic solver is newly developed metaphor-less optimization tool. course of the relies on finest and inferior solutions within population indiscriminate interrelations among nominee individuals. tactic allows superior directions scrutinize exploration space. In this work, algorithm-inspi...