Noisy whisper contaminated by different types of noise are enhanced by compressive sensing method. The intelligibility performance of the enhanced whisper is measured using the short time objective index (STOI). To as...
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Posterior probability support vector machines (PPSVMs) are proved to have good generalization performance and robustness against outliers. However, the disadvantage of a PPSVM is lack of sparseness of solution, i.e., ...
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Posterior probability support vector machines (PPSVMs) are proved to have good generalization performance and robustness against outliers. However, the disadvantage of a PPSVM is lack of sparseness of solution, i.e., the number of support vectors is still too large. This results in high computational burden and decision time. In this paper, we present two approaches to obtain sparse PPSVMs, which are expected to combine benefits of both PPSVMs and sparse classifiers. The first approach sparsifies the PPSVMs by adding l 1 norm penalties on the dual cost function of soft margin PPSVMs. The second one handles a mixed l 1 -l 2 multi-objective optimization by interior-point algorithm. Simulation results show that both approaches have good generalization performance, good robustness against outliers, and high efficiency on decision evaluation.
The prevalence of aphid in winter wheat field has a significant impact on the production of winter wheat. An effective and timely forewarning of the scope and severity of the disease at a regional scale will not only ...
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With the prevalence of group communications, how to implement secure broadcasting among group members has become one of the most important issues. Broadcasting is a point-to-multipoint communication, and secure broadc...
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Digital Rights Management (DRM) is a type of access-control technology that is used by diverse content providers to restrict the use of digital content. Enterprise Digital Rights Management (E-DRM) is an application o...
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The concept of three-way decisions was proposed by Yao and most of three-way decisions models use two thresholds α and β to partition the universe into three parts: the positive region POS(X), the negative region NE...
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Social network is a special kind of network, and the relationship between nodes in social networks are used to evaluate a network of social-related strength. Network area is divided into multiple regions, as the netwo...
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The tradition methods about feature selection are based on mathematical statistics and lack of semantic information. LDA(Latent Dirichlet Allocation) model is a three-level hierarchical Bayesian and a kind of unsuperv...
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In realistic Delay Tolerant Networks (DTNs), the nodes need to keep probing the environment to discover the neighbors in their transmission range. In this paper we assume that the network has a small amount of energy-...
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While neither both source terminals nor relay nodes know any channel state information (CSI) in twoway wireless relay networks, it is difficult for some conventional distributed differential relay models to achieve hi...
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