Shek Lung Lai

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The emergence of neologism in social media has bought the researchers' attention. Traditional ways of text mining are not sufficient to handle the unique properties of messages in the new media. New methods have been developed to extract neologisms in order to help researchers to understand about community behavior in different media. In this paper, we(More)
The existing designs of Butler matrices are all based on microstrip lines, which may cause performance degradation when the operation frequency increases. To solve this problem, this article presents the design and realization of Butler matrix based on patch element. In order to achieve wideband and simple structure features, the circuit utilizes couplers(More)
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