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Classification is a supervised machine learning procedure in which the effective model is constructed for prediction. The accuracy of classification mainly depends on the type of features and the characteristics of the dataset. Feature selection is an efficient approach in searching the most descriptive features which would contribute to the increase in the(More)
With the fast advance of GPS technology and mobile devices, the location-based queries that can provide useful location information for the user have attracted much attention in the database research community. In this paper, we focus on developing a location-based query system, called the QTWN, which provides various queries to retrieve points of interest(More)
Background: Heavy metal pollution in farm soils is a grave concern in Taiwan. Previously, we found the incidence of oral cancer (OC) correlated positively with levels of nickel and arsenic in farm soils. Many OC patients have a second malignancy, among which esophageal cancer (EC) is the most common one in Taiwan. Objectives: We aimed to investigate whether(More)