J. Hu

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An integrated visual thesaurus and result browser to support information retrieval was designed using a task model of information searching. The system provided a hierarchical thesaurus with a results cluster display representing similarity between retrieved documents and relevance ranking using a bullseye metaphor. LSI (Latent Semantic Indexing) was used(More)
—A novel server-side defense scheme is proposed to resist the Web proxy-based distributed denial of service attack. The approach utilizes the temporal and spatial locality to extract the behavior features of the proxy-to-server traffic, which makes the scheme independent of the traffic intensity and frequently-varying Web contents. A nonlinear mapping(More)
In most cases authors are permitted to post their version of the article (e.g. in Word or Tex form) to their personal website or institutional repository. Authors requiring further information regarding Elsevier's archiving and manuscript policies are encouraged to visit: a b s t r a c t Multi-site organizations must balance conflicting forces to determine(More)
—Congestion mitigation and overflow avoidance are two of the major goals of the global routing stage. With a significant increase in the chip size and routing complexity, congestion and overflow have become critical issues in physical design automation. In this paper we present several routing algorithms for congestion reduction and overflow avoidance. Our(More)
BACKGROUND Studies conducted in Europe and the USA have shown that co-morbidity between major depressive disorder (MDD) and anxiety disorders is associated with various MDD-related features, including clinical symptoms, degree of familial aggregation and socio-economic status. However, few studies have investigated whether these patterns of association vary(More)
BACKGROUND The symptoms of major depression (MD) are clinically diverse. Do they form coherent factors that might clarify the underlying nature of this important psychiatric syndrome? METHOD Symptoms at lifetime worst depressive episode were assessed at structured psychiatric interview in 6008 women of Han Chinese descent, age ⩾30 years with recurrent(More)
BACKGROUND Previous studies support Beck's cognitive model of vulnerability to depression. However, the relationship between his cognitive triad and other clinical features and risk factors among those with major depression (MD) has rarely been systematically studied. METHOD The three key cognitive symptoms of worthlessness, hopelessness and helplessness(More)