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Unsupervised learning can address the general limitation of supervised learning that sense-tagged text is not available for most domains and is expensive to create. However, the existing unsupervised learning probabilistic models are computationally expensive and convergence slowly because of large numbers and random initialization of model parameters. This(More)
As an open source server-side scripts language, PHP is used more and more widely by Web developers now. Protecting PHP code from being plagiarized is also a hot research issue especially with the rapid development of dynamic web industry and people’s copyright protection consciousness. Usually the developers use PHP encoders to encrypt the PHP codes before(More)
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