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As an emerging research area, event extraction from Twitter has attracted much attention since 2010. This paper attempts to provide a critical survey of the technical achievements in this area. It covers different aspects of the research, including the definition of the problem, existing approaches, and evaluation issues. Finally, in retrospect of what has been achieved so far, the survey also discusses...
With the rapid urbanization, the land use of Wuhan changes frequently, and the method of remote sensing is used widely on macroscale and mesoscale land use change survey. The aim of the study was to classify the land use of Wuhan to obtain the area of every kind of land types, and to predict land use change trend in the next 15 years. In this process, the method of layered extraction of land types...
This paper introduces a method for extracting the distinctive feature of rotation invariance from image that shows reliable matching between images of different angle. First, we use the method of Harris corner detection for finding the interest points from the two images to be matched, in which an extreme tactics is adopted for exactly determining the interest points. Follow by adopting a sub-block...
This paper presents a new clustering based strategy for path loss prediction. We demonstrate how data mining technology can be utilized to explore the knowledge existing in massive geographical data thus improving path loss prediction accuracy and reducing field measurement cost. Comparative path loss prediction experiments between new strategy and traditional ones confirm that the new strategy guarantees...
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