“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）。
随便看	occupational hazardous factor occupational hazard pre-evaluation occupational hazard risk classification occupational hazards during the construction and operation in railways occupational hazards of gamma rays occupational hazards of ionizing radiation occupational hazards of non-ionizing radiation occupational health occupational health and occupational medicine Occupational Health and Safety Assessment Series 18000 occupational health examination occupational health for all occupational health management in construction project occupational health monitoring on plateau railway occupational health of female worker occupational health prevention technology occupational health psychology occupational health risk assessment occupational health service occupational health supervision occupational health supervision and management occupational health surveillance occupational health technical service agency occupational health technology and protection occupational health “three at a time”

科学参考收录了854744条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。