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This paper proposes a hybrid method of estimation of distribution algorithms (EDAs) and genetic algorithms (GAs) based on master/slave cooperation. The master process estimates the probability distribution of the search space based on the non-dependency model at each iteration and sends probability vectors to slaves. The slaves use the vector to generate new initial population. Our approach employs...
The digital watermarking scheme is designed for high quality music by using the direct-sequence spread spectrum technique. Both the un-detection probability for the music with the watermark and the erroneous detection probability for the music without the watermark are examined. Excellent results are obtained, that is, both of the probabilities are less than 10-8. The quality of the music embedded...
Creolization is a self-organization process of new language community. Thus far, a simulation study of the emergence of creoles has been reported in a mathematical framework. In this paper we introduce a scale-free network to the framework. We show that local creole communities are organized, regardless of the degree of exposure to non-parental languages, in contrast to the non-spatial model, and...
Human sleep stages wring whole night are usually classified into six stages based on polysommnographic (PSG) record. Sleep state of human light sleep changes gradually and continuously. In this study, automatic judgment of light sleep state in PSG record was developed. Parameters for characterizing the PSG were calculated from the periodogram and the discriminant function was constructed by using...
Creolization is a self-organization process of new language community. Thus far, a simulation study of the emergence of creoles has been reported in the mathematical framework. In this paper we introduce a spatial structure to the framework. We show that local creole communities are organized, and creolization may occur when language learners learn often from non-parental language speakers, in contrast...
This paper introduced an expert knowledge-based automatic sleep stage determination system working on statistical signal processing. The main methods included two processes. One was expert knowledge base construction, which was developed in terms of probability density functions (pdfs) of parameters for each sleep stage. Here, the visual inspection by a clinician was utilized rather than stage scoring...
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