frequency graph

Our analysis indicates that multiresolution analysis has the disadvantage of miss some scatterers, especially for relative regular scattering, however, using the time frequency graph of continuous wavelet transform can obtain the better result.

分析结果表明，对规则性较强的散射体用多分辨分析容易产生漏检，而利用连续小波变换时频图则可以得到较好的效果。

According to the theoretical analysis of the frequency graph tested by 1250 frequency detector, the mathematical model can be deduced.

本文首先对连铸结晶器位置系统的数学模型进行了理论分析，并利用1250频率特性测试仪对其模型进行了实际测试，分析实测得到的频率特性曲线从而得出实际的数学模型表达式。