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频率指数
1、cutoff frequency───截止频率
2、frequency───n.频率；频繁
3、frequency polygon───[统计]频数多边形
4、index───vi.做索引；vt.指出；编入索引中；n.指标；指数；索引；指针
5、frequency range───频带; 频段；[电子][通信]频率范围
6、frequency generator───[计]频率发生器
7、frequency modulation───调频
8、cumulative frequency───[统计]累积频率，[电子]累积频数
9、frequency equation───频率方程
1、Research on Match Frequency Index in 17th World Soccer Cup───第17届世界杯足球赛比赛密度指标的研究
2、And the statistics of 33 species of birds, by means of meeting frequency index, show that there are 5 dominant species, 8 common species and 20 rare species.───并对33种鸟采用遇见频次指数法进行数量统计，其中优势种5种，常见种8种，稀有种20种。
3、A Research on Match Frequency Index of China Football Super League in───中国足球超级联赛比赛密度指标的研究
4、data and the text index need to be explicitly synchronized if no update frequency is specified.───如果没有指定更新频率，那么需要显式地对数据和文本索引进行同步。
5、Parametric model for low-frequency index of subjective car interior sound quality───车内噪声品质低沉度参量的数学模型
6、The create index command establishes the text index infrastructure by defining the text index attributes, such as update frequency, a document format, an index directory, and so on.───create index命令定义文本索引属性，比如更新频率、文档格式、索引目录等等，从而建立文本索引基础设施。
7、Structure Damage Identification with BP Network Based on Frequency Index───基于频率指标用BP网络进行结构损伤识别
8、Optimization of the Frequency Index of the Diesel Generator Set with PD-1 Electronic Governor───利用PD-1型电子调速器优化柴油发电机组的频率指标
9、On frequency index of blasting safety criterion───浅析爆破安全判据的频率指标