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Spectrum sensing is of utmost importance in cognitive radio and dynamic spectrum access systems for achieving spectrum awareness. To provide reliable spectrum awareness, it is critical to develop (near-) optimal sensing techniques and understand achievable performance limits. In this paper, we study likelihood ratio test (LRT)-based methods for detection of a signal of interest (SOI) assuming multiple...
One of the main bottle-necks in traditional facial age estimation is the lack of training sample problem. The rapid development of Internet provides us new chance to solve this problem. Unlimited number of facial images with their age labels can be collected through web mining technique. These images together with their surrounding text description make up the simplest cross-media data representation...
The speed of dictionary query affects not only the speed of segmentation, but also the wide use of the segmentation system in the mass calculation. According to the different occurrence frequency of words in the text, the dictionary mechanism of the suboptimal search tree is designed so that the comparison times is reduced in the process of segmentation and the speed of segmentation is improved. Finally,...
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