The validity problem of active multi-decoy to ground base radar system is studied.

研究了有源多假目标等欺骗性电子干扰对地基防御雷达系统的有效性问题。

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For many clustering algorithms, it is very important to determine an appropriate number of clusters, which is called cluster validity problem.

对于许多聚类算法，决定合适的聚类数目至关重要，这称为聚类有效性问题。

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For many clustering algorithms, it is very important to determine an appropriate number of clusters, which is called cluster validity problem.

对于许多聚类算法，决定合适的聚类数目至关重要，这称为聚类有效性问题。

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