二维时域／频域编码
2-D time wavelength code
2-dimensional wavelength-time code
频域-时域混合积分
mixed integration in time-frequency domains
时频特征
Time frequency feature
time frequency character
Time-frequency feature
time and frequency characteristic
time-frequency characteristics
time-frequency characteristic
time domain and frequency characteristic
time-frequency
time-frequency property
时－频特征
time-frequency characteristic
时频特征谱
the time-frequency characteristic spectrum
时域-频域
time domain-frequency domain
时域频域分析
Time-domain and frequency-domain analysis
时域特征
time domain characteristics
temporal character
development features
time domain characteristic
time domain features
temporal feature
time-domain character
时域特征波法
the time domain characteristic based method
时域特征法
method of time-domain characteristics
时域特征提取
Time-domain Feature Extraction
低频特征频率
natural frequency in low frequency band
频域特征
spectral features
Frequency characteristic
frequency-domain feature
frequency domain character
frequency charateristic
frequency domain
FFT时频域分析
FFT analysis in frequency and time domain