By method of illustration, we introduce envelope demodulating instead of multiplying demodulating for balance amplitude modulation wave. 用作图法阐明如何用包络检波替代乘法解调,实现对平衡调幅波的解调。
Based on these the wave envelope theory of wave groups due to Longuet Higgins is modified. 在此基础上对Longuet-Higgins的群性波包理论进行修正。
In this paper, the Jacobi elliptic function method is generalized to study nonlinear evolution system. The envelope periodic solutions of long-short wave interaction equation are obtained. 推广了Jacobi椭圆函数展开方法,研究了复非线性演化方程组的求解问题,得到了长短波相互作用方程的准确包络周期解。
Envelope soliton of stress wave on wall of a fluid-filled circular tube 充满流体的圆形管道上应力波包络孤子
The variation of stratification with time cannot lead to the variation of wavelength and envelope width, but the amplitude of the wave envelope will increase while the amplitude of the wave decreases in time. 层结随时间的变化不会引起波包波长和包络的宽度的变化,但层结随时间减小时,波包振幅增加。
Therefore, a theoretical reference is offered for the synthesis of S coda envelope by a discovery of the mechanism of high frequency S coda wave excitation. 高频S尾波形成机制的揭示为S尾波包络的合成提供了理论参考。
Research the detection of a wave by online ICA algorithm. Experimental results further confirm that using online ICA algorithms for envelope detection of EEG rhythm wave is effective. 6. 对在线ICA算法在α波检测中的应用进行了研究,结果进一步验证了在线ICA算法对于脑电节律波进行实时包络提取的可行性。
Based the velocity envelope, the effect of scattering patterns on S wave velocity envelope is discussed. 据此,讨论了不同散射模式对S波速度包络的影响。
From the analysis result, the result from the group of direct wave and single scattering term match the whole velocity envelope of S wave pretty well at small hypocentral distance ( less than100km). 分析结果表明,在震源距较小(小于100km)时,直达波与单次散射组合项几乎与整体速度包络重合。
Thus, a new quantitative measurement for the S wave envelope broadening is provided. Secondly, based on anisotropic scattering patterns, the effect of group of direct wave and single scattering term and multiple scattering terms on S wave velocity envelope is investigated. 其次,基于各向异性散射模式,分析了直达波与单次散射组合项,以及多次散射项对S波速度包络的影响。