Yufeng Ma

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—Scarcity of the spectrum resource and mobility of users make Quality-of-Service (QoS) provision a critical issue in wireless networks. This paper presents a fuzzy call admission control scheme to meet the requirement of the QoS. It searches automatically the optimal number of the guard channels in a base station to make an effective use of resource and(More)
Most of the current techniques for in vivo detection of dopamine exploit the ease of oxidation of this compound. The major problem during the detection is the presence of a high concentration of ascorbic acid that is oxidized at nearly the same potential as dopamine on bare electrodes. Furthermore, the oxidation product of dopamine reacts with ascorbic acid(More)
In this paper, we investigated the self-assembly and fractal feature of chitosan and Ag (I), Cu (II)-chitosan due to the theoretical and practical importance of chitosan in biomedical engineering, biomaterials and environmental sciences etc. The self-assembly and fractal structures of chitosan and Ag (I), Cu (II)-chitosan were observed using atomic force(More)
In this paper, we present a novel multi-level design method to secure encryption algorithms against DPA attack. Generally, DPA-resistant methods can be mainly divided into two levels: software and hardware. Software-based countermeasures are relatively cheaper to put in place, while hardware-based methods counteract DPA at a lower level and achieve better(More)
Multiple-channels data from satellite and unmanned aerial vehicles images have gained much attention. An advanced approach used in the advanced orbiting systems is to divide the space channels into multiple-channels, called virtual channels (VC), which are scheduled according to a special mechanism achieved through the feature learning of on-satellite(More)
With the emerging of various online video platforms like Youtube, Youku and LeTV, online movie reviews become more and more important both for movie viewers and producers. As a result, automatically classifying reviews according to different requirements evolves as a popular research topic and is very essential in our daily life. In this paper, we focused(More)
With the development of China's Internet economy, the rapid rise of mobile media, the Internet has become the first entrance to the user access to information. The value of traditional media information portal is weakening. Media convergence is increasingly becoming the road of traditional media to survival and develops. The breakthrough of radio and(More)