Qiwei Tang

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Precise and secure node localization is one of key problems for applications based on wireless sensor networks. Recently multidimensional scaling-based localization algorithms made a great achievement in performance, but this algorithm is without security design. This paper analyze the security weaknesses of the MDS-MAP location algorithm basic on(More)
Cloud storage system poses new challenges to the community to support efficient concurrent querying tasks for various data-intensive applications, where indices always hold important positions. In this paper, we explore a practical method to construct a two-layer indexing scheme for multi-dimensional data in diverse server-centric cloud storage system. We(More)
Collagen is a kind of natural biomedical material and collagen based three-dimensional porous scaffolds have been widely used in skin tissue engineering. However, these scaffolds do not meet the requirements for artificial skin substitutes in terms of their poor mechanical properties, short supply, and rejection in the bodies. All of these factors limit(More)
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