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2-D DOA Estimation of Coherent Wideband FM Signals Based on STFT基于STFT的相干宽带调频信号2-D到达角估计 Wideband FM signal occupies a wide band in frequency domain and has a time-varying direction vector. Therefore it is difficult to estimate its DOA,particul... Li Liping,Hang Keji,Chen ...
M.RAMESHDr.B.Raveendra Babu
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We found that model\(\tilde{M}_{10}\)had the highest accuracy on the testing set of the first subkey. It is\(28.20\%\)more accurate than the traditional one-to-one trained model\(\tilde{M}_{1}\)on the testing set of the first subkey. ...
STFT和ISTFT的窗长和帧移分别为25 ms和6.25 ms,FFT长度为512。T-F谱的特征图数C设置为64。编码器和解码中的所有卷积层都进行层归一化和参数ReLU非线性。在DPTPM中的卷积层之后是参数化的ReLU非线性。致密块由四个扩张的卷积层组成,扩张速率为d = 2。密集块的连续层中输入通道的数量随C、2C、3C、4C而线性...
The sensitivity of the developed sensor varies from minimum values of 20 µV/nm and 7 V/g (where g = 9.81 m/s2 is the gravitational acceleration), at a frequency of 23 Hz, to peak values of 92.5 mV/nm and 2443 V/g, at the mechanical resonance of the cantilever at 97.25 Hz. ...
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结合变分模态分解(VMD)与短时傅里叶变换(STFT)分析,发现弧触头接触时产生了10 kHz以上的高频振动特征信号。通过调整机构拉杆的位置以改变弧触头刚合点,发现了高频振动特征频率出现时刻与弧触头刚合点之间的相关性,进而提出了一种基于弧触头接触振动特征分析的高压SF6断路器电寿命在线监测方法。现场瓷柱式断路器的实验...