In this paper we propose a novel technique of using a hybrid evolutionary;method, which uses a combination of genetic algorithm and matrix based solution methods such, as QR factorization. The training of the model is...
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In this paper we propose a novel technique of using a hybrid evolutionary;method, which uses a combination of genetic algorithm and matrix based solution methods such, as QR factorization. The training of the model is based on a layer based hierarchical structure for the architecture and the weights for the Artificial Neural Network classifier. The architecture for the classifier is found using a binary search type procedure. The hierarchical structured algorithm (EALS-BT) is also a hybrid, because it combines the Genetic Algorithm based method with the Martix based solution method for finding weights. A heuristic segmentation algorithm is initially used to over segment each word. Then the segmentation points are passed through the rule-based module to discard tire incorrect segmentation points and include any missing segmentation points. Following the segmentation the contour is extracted between two correct segmentation points. The contour is passed through the feature extraction module that extracts the angular features. after which the EALS-BT algorithm finds the architecture and the weights for the classifier network. These recognized characters are grouped into words and passed to a variable length lexicon that retrieves words that have the highest confidence value.
Incorporated with the Z curve method, the technique of wavelet multiresolution (also known as multiscale) analysis has been proposed to identify the boundaries of isochores in the human genome. The human MHC sequence ...
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Incorporated with the Z curve method, the technique of wavelet multiresolution (also known as multiscale) analysis has been proposed to identify the boundaries of isochores in the human genome. The human MHC sequence and the longest contigs of human chromosomes 21 and 22 are used as examples. The boundary between the isochores of Class III and Class II in the MHC sequence has been detected and found to be situated at the position 2,490,368bp. This result is in good agreement with the experimental evidence. An isochore with a length of about 7 Mb in chromosome 21 has been identified and found to be gene- and Alu-poor. We have also found that the G + C content of chromosome 21 is more homogeneous than that of chromosome 22. Compared with the window-based methods, the present method has the highest resolution for identifying the boundaries of isochores, even at a scale of single base. Compared with the entropic segmentation method, the present method has the merits of more intuitiveness and less calculations. The important conclusion drawn in this study is that the segmentation points, at which the G + C content undergoes relatively dramatic changes, do exist in the human genome. These 'singularity' points may be considered to be candidates of isochore boundaries in the human genome. The method presented is a general one and can be used to analyze any other genomes. (C) 2003 Elsevier Inc. All rights reserved.
Solving numerical integration by particle swarm optimization by traditional methods not only cannot satisfy parallel but also their segmentation points are uniform. In this paper, particle swarm optimization is used t...
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ISBN:
(纸本)9783642163388
Solving numerical integration by particle swarm optimization by traditional methods not only cannot satisfy parallel but also their segmentation points are uniform. In this paper, particle swarm optimization is used to calculating the numerical value of definite integrals, which sufficiently exerts the advantage of particle swarm optimization such as group search and global convergence. It satisfies the question of parallel calculating numerical integration in engineering and those segmentation points are adaptive. Several numerical simulation results show that the algorithm offers an effective way to calculate numerical value of definite integrals, and it has high convergence rate, high accuracy and robustness.
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