The measurement of the importance degree of attribute is very important to the compression and comprehensive appraisal of database.
属性重要程度的测量对于数据库的压缩和综合评价都是非常重要的。
The improved rank sum method not only analyzes the importance degree of attribute, but also its result can be analyzed in a statistical way in many aspects, so it is of great practical value.
改进的秩和法不仅分析了属性的重要程度，而且其结果还可以进行多方面的统计分析。具有较高的实用价值。
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