Juan Qi

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In a Wi-Fi based indoor localization system (WILS), mobile clients use received Wi-Fi signal strength to determine their locations. A major problem is the variation of signal distributions caused by multiple factors, which makes the old localization model inaccurate. Therefore, the transfer learning problem in a WILS aims to transfer the knowledge from an(More)
With the development of pervasive computing, location information remains a crucial component of context-aware. The ability to provide multimedia service according to users' locations would be attractive for intelligent tourism, shopping guide, etc. In this paper, we present a prototype system for location-based multimedia service as a guideline to design(More)
Understanding human intention and performing different activities automatically is one of the key problems in pervasive computing. In this paper, a new location-based search computing framework (LoSeCo) is proposed to allow one's pervasive device to augment search devices. The objective of our problem is to recognize the real-time user goal through goal(More)
It is well known that some lifestyle factors are related to depression, but their cumulative contribution to the depression remains unclear. This study aimed to assess the importance of multiple lifestyle factors in contributing to depressive symptoms among Chinese college students. Between September and December in 2012, we conducted a cross-sectional(More)
In order to realize security checking on power communication operation mode, we introduce a new method for service and system security checking and analyzing, which include the multidimensional analysis and the N-1 service impact analysis. Based on this method we managed to design and realize the system, which can monitor and display the effective mode(More)
An H9N2 virus lethal to chickens was isolated from an acutely ill chicken flock in 2012. Phylogenetic analyses indicated that this virus was phylogenetically related to the Y280 lineage. Sequence analysis showed 1 amino acid deletion in HA1 and 3 amino acid deletions in the NA stalk region.
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