最后，在知识与规则的基础上，设计了城市管线数据校验的模型，并以应用实例对此模型进行了验证。

Finally, on the basis of the knowledge and rule, the paper designs checking model for urban pipe-line data, moreover, it introduces the realization of this checking by using many successful instances.

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提出了一种基于置换矩阵的非规则低密度奇偶校验(LDPC)码的校验矩阵设计方法。

A design of parity check matrix for Irregular LDPC codes based on per mutation matrix is proposed in this paper.

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