Xiaoping Feng

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The administrator shall implement multilevel security policy in a multilevel security network system. The policy must ensure the information flow from low level host to the same level host or high level host, and prevent the information flow from high level host to low level host, but traditional network is difficult to meet the requirement. This paper(More)
Recommendation can be reduced to a sub-problem of link prediction, with specific nodes (users and items) and links (similar relations among users/items, and interactions between users and items). However, the previous link prediction algorithms need to be modified to suit the recommendation cases since they do not consider the separation of these two(More)
Over the past six decades, coastal wetlands in China have experienced rapid and extensive agricultural reclamation. In the context of saline conditions, long-term effect of cultivation after reclamation on soil chemical properties has not been well understood. We studied this issue using a case of approximately 60-years cultivation of a coastal saline marsh(More)
Middle Boxes serve for the security in Data Center Networks (DCNs). Together with the growth of the services and applications in DCNs, flexible and scalable middle box deployment is highly required. The current middle box deployment methods are error prone. In this paper we propose Policy Aware Data center network (PAD), a flexible and scalable middle box(More)
In order to improve the speed of the DOA estimation, an efficient MUSIC algorithm using subspace projection is proposed in this paper. In the algorithm, the covariance matrix, which causes high computational complexity in the subspace projection (SP) algorithm of subspace tracking field, is approximated to simplify the processing procedure. The proposed(More)
Cu(OH)2 nanoribbons template provides a simple way for producing arrays of copper oxalate nanorods and assemblies with controllable size and shape of the arrays of copper oxalate in situ reaction on Cu(OH)2 nanoribbons. The observations of scanning electron microscopy and characterization of X-ray powder diffraction and Fourier transmission infrared(More)
We examined the structural properties of copper sulfide films as a function of the sulfurization time of 70-nm-thick Cu films. Copper sulfide films with various phases such as mixed metallic Cu-chalcocite, chalcocite, roxbyite, and covellite phases were formed with increasing sulfurization time. To evaluate the structural stability of various films, all the(More)
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