The exact formulae of the acoustical impedance of a narrow slit and its low-frequency approximation are available.
窄缝的声阻抗严格公式以及低频近似公式都存在。
By using MATLAB signal and using window method, frequency sampling and Chebyshev approximation the design of low pass digital filter in the toolbox have been processed.
采用窗函数法、频率抽样法和切比雪夫最佳一致逼近法，通过调用Matlab信号处理工具箱中的函数设计低通数字滤波器。
A hybrid technique for calculating the scattering of two-dimensional large bodies with slots is developed by combining high-frequency approximation method with low-frequency numerical method.
本文利用高频近似方法与低频数值方法相结合的混合方法计算二维开槽电大目标的散射。
A hybrid technique for calculating the scattering of two-dimensional large bodies with slots is developed by combining high-frequency approximation method with low-frequency numerical method.
本文利用高频近似方法与低频数值方法相结合的混合方法计算二维开槽电大目标的散射。
应用推荐