... variation needle 磁差测定仪针 variation of frequency 频率变动 variation of instrument reading 仪表读数变化 ...
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Effect of frequency variation 频率影响
Variation of load frequency 负荷频率变化
the variation of power-frequency current 工频电流变化量
variation ratio of squared frequency 频率变化平方比
Variation of Impedance with Frequency 频率与阻抗之变化
The signals were divided into segments and the frequency spectra were got and the frequency features were achieved and 4 types of variation of frequency were found.
对微地震信号预分段，用小波提取其频率谱中的频率特征，得到了频率变化的四种趋势。
The variation of frequency curve's mode peak content with the increasing of depth, shows not only the trend of chemical weathering but also variation gradient of weathering extent.
频率曲线众数峰含量随深度的变化，不但指示了化学风化趋势，而且反映了风化程度的变化梯度。
Generalized into local frequency from integral frequency, the method of joint time-frequency distribution effectively analyzes the signal based on the variation of frequency with time.
联合时频分布方法把整体频谱推广到局部频率，根据频率随着时间的变化情况，对信号进行有效的分析。
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