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Fuzzy Comprehensive Evaluation Model for Choose Watermark

ZHANG Zhong-yuan, CHEN Ming-ming

Abstract （559）

PDF （165KB）（258）

As an information hide technology for implementing protection of multimedia copyright and content authentication, the digit watermark technology has become more and more useful and practical. But it is difficult to choose a suitable watermark for non-professional staff. For this reason, a fuzzy comprehensive evaluation model was designed. Based on robustness of digital watermarking the model used the methods of Delphi method and AHP (analytic hierarchy process). The experimental results show that fuzzy comprehensive evaluation model is convenient to choose watermark. The model is effective and practical.

2010, 30 (3): 65-67. DOI: 10.3696/j.issn.1672-6952.2010.03.018

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Convergence Theorem of Some Iteration Methods

SONG Dai-cai, ZHANG Zhong-yuan, LU Yong-jie

Abstract （391）

PDF （189KB）（490）

For the linear equations system whose coefficient matrix is of -diagonal strictly dominance or doubly -chain diagonal strictly dominance, convergence properties of some iteration methods were studied and some convergence theorems were given, which solves the problem of spectral radius of iterative matrices. Results are applicable not only for -diagonal strictly dominance matrix or doubly diagonal strictly dominance matrices, but also for generalized strictly diagonally dominant matrices. Finally, numerical examples were given for illustrating advantage of results.

2008, 28 (3): 75-78.