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Aiming at the coal mine personnel positioning method based on wireless sensor network technology, contrasting with advantage of now-existing feasible methods, consulting with traditional trilateral positioning, this paper proposed weighted trilateral localization method based on RSSI ranging. In order to ensure the precision of distance measurement, analysis the cause of error of RSSI, improved the...
According to the characteristic of the Chinese speech, we propose a method of retrieving the Chinese speech based on wavelet transform in this paper. At first we preprocess the data in the warehouse to provide the high quality speech data. And then we divided the speech samples into subsections and pick up the character of them. Finally, based on the Euclid distance of scale parts, we retrieve the...
Parameter estimation of small samples is a valuable research problem in various test domains. Because of the complexity in determining the probability distribution, it is difficult to use a traditional probability theory to process the samples and assess the degree of uncertainty. Based on the grey relational theory and the norm theory, the grey distance information approach for small-sample processing...
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