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For applications with consecutive incoming training examples, on-line learning has the potential to achieve a likelihood as high as off-line learning without scanning all available training examples and usually has a much smaller memory footprint. To train CRFson-line, this paper presents the Periodic Step size Adaptation (PSA) method to dynamically adjust the learning rates in stochastic gradient...
The traditional statistical models assume the covariance matrices for two populations are identical and both populations need to be described by multivariate normal distribution. Clearly, these assumptions do not always reflect the real world. Rough set is a new technique for data mining domain application. In this study, establish a financial distress prediction model using Fuzzy-Rough approach to...
The purpose of this research is to propose an appropriate classification approach to improving the effectiveness of spam filtering on the issue of skewed class distributions. A clustering-based classifier is proposed to first cluster documents into several groups, and then an equal number of keywords are extracted from each group to alleviate the problem caused by skewed class distributions. Experiments...
CT scan provide valuable medical image information and intravenous iodinated contrast medium injection can enhance the image contrast quality. Some patients, who may suffer palpitation, emesis, and other stress phenomena, even induce death after intravenous iodinated contrast medium injection. In this paper, we develop a real-time risk indicator based on patients' heart rate variation. The heart rate...
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