Then the influence on the average power spectrum and bispectrum of specklegrams caused by the photon noise, additive noise and more complex noises of other kinds in the detecting system .
介绍了所用的二维光子计数斑点像探测系统的性能，分析了探测系统的光子噪声、附加噪声和其它更复杂的噪声对斑点图的平均功率谱和重谱的影响。
The power spectrum of the noise and signal are estimated by the average smooth periodogram method.
用平均平滑周期图法分别估算出信号与噪声的功率谱密度函数。
The average power reflection coefficient, directivity, power spectrum are obtained for different edge plasma densities and for different phasings between main waveguides.
计算了其平均功率反射系数、方向性系数和功率谱与等离子体边缘密度和主波导相位差等参数的关系。
应用推荐