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中文摘要：
在这篇论文，近似 XFD 的定义基于价值平等被建议。二个度量标准，支持和力量，为测量 approximateXFD 的度被介绍。一个基本算法为提取近似 XFD 的最小的集合被设计，然后二优化策略被建议改进表演。最后，试验性的结果证明优化算法正确、有效。
英文摘要：
In this paper, the definition of approximate XFDs based on value equality is proposed. Two metrics, sup port and strength, are presented for measuring the degree of approximate XFD. A basic algorithm is designed for extracting minimal set of approximate XFDs, and then two optimized strategies are proposed to improve the performance. Finally, the experimental results show that the optimized algorithms are correct and effective.
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