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In this paper, we propose an unsupervised machine learning method to automatically construct a product hierarchical concept model based on the online reviews of this product. Our method starts by representing each candidate noun using a feature context vector, which is simply a vector of all its co-occurring neighbors excluding itself. We then applied bisection clustering to hierarchically cluster...
The idea of event detection is to identify interesting patterns from a constant stream of incoming news documents. Previous research in event detection has largely focused on identifying the first event or tracking subsequent events belonging to a set of pre-assigned topics such as earthquakes, airline disasters, etc. In this paper, we propose a new problem, called Anticipatory Event Detection (AED),...
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