1) frequency variation
频率改变量
1.
The switching power supply which adopted synchronization technology can make switch-ing devices always work in the condition of integer multiple of synchronization pulse frequency in the wide voltage range,so it can greatly reduce frequency variation generated in the wide voltage range of working.
该开关电源采用同步技术,使开关管在宽电压范围内始终工作在同步脉冲频率的整数倍,从而大大减少了宽电压范围工作时产生的频率改变量。
3) change rare of frequency
频率改变率
1.
Then damage extent is identified by neural network technique of change rare of frequency.
针对结构损伤问题,采用损伤定位、定量的分阶段识别方法,即利用柔度曲率改变率指标来确定结构损伤的具体位置,然后以频率改变率为输入参数构建神经网络对损伤部位进行程度识别。
4) multivariable frequency method
多变量频率法
1.
A comprehensive control system for generator s excitation and speed regulation based on multivariable frequency method;
基于多变量频率法的发电机励磁和调速联合控制系统
5) parametric frequency converter
参量频率变换器
6) variance of gene frequency
基因频率变量
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