| 1. | Mean squared spectral density
均方谱密度 |
| 2. | Power spectral density
功率谱密度 |
| 3. | Power spectrum density
功率谱密度 |
| 4. | Conduct the rig / component testing , psd testing and electro - dynamic testing
进行台架/零部件试验， psd （功率谱密度）测试和电力学测试。 |
| 5. | Analysis of evolutionary power spectra density function of ground motion induced by blasting seismic
爆破地震地面运动的演变功率谱密度函数分析 |
| 6. | A random signal of known statistical properties of amplitude , distribution , and spectral density
振幅、分布及谱密度等的已知统计特性的随机信号。 |
| 7. | The estimation of the phase difference of two vibration signals of the same frequency by cross - spectral density
用互谱密度函数估算两同频振动信号的相位差 |
| 8. | The cumulation of tdfcsd in a certain period eliminates the remainder noise more , and the ability of detecting signal ' s frequency is improved
通过对某段时间得到的功率谱密度累积，进一步改善snr ,提高信号频率的检测能力。 |
| 9. | The paper analyses the signal processing with emphasis on signal to noise ratio ( snr ) in output of correlator and snr in signal power spectral density
并对算法处理中相关器输出中的信噪比（ snr ）和功率谱密度中的snr进行了重点分析。 |
| 10. | In the end of this chapter , the power spectrum density ( psd ) analysis of hrg is given , which shows that the main noise of hrg is low frequency noise
论文还对陀螺信号进行了功率谱密度分析,分析结果表明陀螺的主要误差都集中在低频段。 |
