1) frequency normalization
![点击朗读](/dictall/images/read.gif)
频率归正
2) frequencies assignments
![点击朗读](/dictall/images/read.gif)
频率归属
3) normalized frequency
![点击朗读](/dictall/images/read.gif)
归一化频率
1.
The relationships between the interplanar spacing,Bragg diffraction peak and normalized frequency under pressure were discussed by studying the pressure sensitivity properties of the three-dimensional polystyrene photonic crystals.
通过研究聚苯乙烯三维光子晶体的力敏性质,讨论了不同压强作用下聚苯乙烯三维光子晶体的晶面间距、Bragg衍射峰与归一化频率之间的关系:随外加压强的增大,晶面间距减小;随归一化频率的增大,Bragg衍射峰随之蓝移。
4) normalized frequency
![点击朗读](/dictall/images/read.gif)
归-化频率<光>
5) frequency correction
![点击朗读](/dictall/images/read.gif)
频率校正
1.
A new frequency correction method was obtained,suitable for the situation of high-order harmonic generation,and this method was proved by two simulation experiments.
采用相位差法对工频频率测量进行了研究,推出了频率校正的计算公式;研究了窗函数和窗长度的选择对校正精度和响应时间的影响,在窗长度足够长的情况下,采用布莱克曼窗、凯泽窗有很高的校正精度;为提高响应速度,推导出了窗长为一个工频周期的傅立叶系数的计算公式,得出只含单频成分时,仍能够采用相位差法对频率进行校正,而当含有高次谐波时不宜直接采用相位差法的结论;还得到一种新的频率校正方法,该方法适合含有高次谐波的情况;通过给出的两种模型进行仿真实验,验证了理论结果的正确性。
补充资料:频率计量(见时间频率计量)
频率计量(见时间频率计量)
frequency metrology: see time and frequency metrology
口n IQ liliang顷率频率计皿(f比quency metrolo盯) 计t。见时闰
说明:补充资料仅用于学习参考,请勿用于其它任何用途。
参考词条