The Lower Estimate on n-Widths of Some Periodic Convolution Classes in L_ ( 2 π) Space 某些周期卷积类在L(2π)空间内宽度的下方估计
On Approximation by a kind of periodic convolution operators in l_m~ metric LM~尺度下一类周期卷积算子的逼近
The problem on asymptotic periodic solutions of convolution type linear volterra equations is studed, and sufficient conditions for existence of asymptotic periodic solutions are given. 研究了线性卷积型Voterra方程的渐近周期解问题,给出了渐近周期解存在的充分条件。
For the periodic vibration, the secondary path can be represented with the amplitude and phase at one frequency, so convolution is avoided and computation is broken down. 对于窄带振动干扰,误差次通道用其在振动频率处的幅值和相位延迟来表示,并给出相应的在线辨识方法,因此控制器参数调整不需要进行卷积计算,减少了计算量。