“non-metric distance”的概念、定义、翻译、参考文献-科学参考

单词	non-metric distance
释义	non-metric distance Encyclopedia 理学聚类分析释 non-metric distance非度量距离给定数据集，对于任意的对象和，如果它们之间的度量满足下面4个条件：①非负性：对于任意两个对象和，有；②自反性：当，有；③对称性：对于任意两个对象和，有；④三角不等式：对于任意三个对象，和，有：。则称为度量距离（metric distance），不满足以上部分条件的被统称为非度量距离（non-metric distance）。
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