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A novel multiobjective DE algorithm using the subregion and external set strategy (MOEA/S-DE) is proposed in this paper, in which the objective space is divided into some subregions and then independently optimize each subregion. An external set is introduced for each subregion to save some individuals ever found in this subregion. An alternative of mutation operators based the idea of direct simplex...
The simulated annealing (SA) algorithm is applied to the discrete structural optimization of trusses. Some approaches have been proposed to improved the basic procedures of the SA algorithm, such as the determination of initial temperature, the generation and acceptance of solutions, a recorder added, and the coverage criterion based on a newly defined relative precision. By using a multi-objective...
There are two kinds of layout designs in multi-protocol label switch network:on-line and off-line. To perform traffic engineering based on a given topological structure and Qos requirement of the network, the layout design must be carried out to search an optimal link set and to make the flow distribution. One advantage of off-line MPLS layout design is to allow a globally optimal network design....
Ant clustering is one of effective clustering methods. Compares to other clustering methods, ant clustering algorithm has one outstanding advantage and one disadvantage. The advantage is that the total numbers of cluster is generated automatically ,and the disadvantage is that its cluster result is random and its result is influenced by the input data and the parameters, which leads low quality of...
To significantly improve the performance of supplier selection model, After analyzing the general approach for this problem, a new solution using analytical hierarchy process (AHP), technique for order preference by similarity to ideal solution (TOPOSIS) and data envelopment analysis (DEA) is proposed. In AHP, using radic3 scale method, the uniformity is increased, comprising to general. Structure...
Herein we describe a system for gastroscopic image retrieval which based on PCA algorithm. First quantize and cluster in HSV color space, make use of spatial partitioning-weighted method to calculate each block’s main color, and then combine with color correlogram to carry out integrate retrieval. A PCA algorithm is adopted to reduce the dimension since the dimension of feature vector which including...
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