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An algorithm of 3D model watermarking which has an effective resistance to the affine transform is designed. The algorithm uses high-capacity gray image as the watermark information, and chooses Nielson norm combining with redundancies of triangle meshes. Experimental results show that the algorithm can effectively resist attacks such as translation,(More)
Decision tree is an effective way of classification rule extraction. For the incomplete decision system, an algorithm of constructing decision tree and classification rule extraction is presented based on the logical relationship between attributes which is described with generalized decision function, and conditional information entropy as heuristic. In(More)
Seeking the unknown celestial body is one of the profound goals for the mankind explores pursued universe. Outlier mining is a kind of effective way of finding the spectrum data of unknown celestial body. Using outlier mining as the way of analyzing star spectrum data and VC++, Oracle9i as development tools, the outlier mining system on star spectrum data(More)