On the basis of the methods above, the method of time-frequency analysis: local wave method is introduced.
在时域、频域分析方法的基础上，论述了一种时频域分析方法这——局域波法。
Then, Local Wave method is introduced in consideration of the non-stationarity characteristic of the vibrating signals from NC machines.
针对数控机床机械系统的非线性和振动信号的非平稳特性，引入局域波分析方法。
The research work mentioned above enhances the local wave method. It also proved that the methods which are introduced in the paper can effectively identify the fault and solve practical problems.
以上研究工作在一定程度上丰富和完善了局域波分析方法，诊断应用表明本文中提出的方法能够有效的识别故障，解决实际问题。
The blind source separation fault diagnosis method based on Local wave time-frequency images is developed.
提出了一种基于局域波时频图像的盲源分离故障诊断方法。
The concept of local energy in time-frequency plane, based on local wave theory, is defined. Then a new feature extraction method based on the local energy in time-frequency plane is given.
在局域波理论的基础上，引入了时频局部能量的概念，进而提出了一种基于时频局部能量的特征提取方法。
The local wave decomposition method is a new method to analyse instability and nonlinearity.
而局域波分解法是一种新的分析非平稳、非线性的工具。
In the paper, the method is applied, to the SH-wave scattering in site with local irregular topography. It is convenient...
文中还利用这一方法处理了由于局部不规则地形引起的SH波的散射问题，波场输入十分方便。
In the paper, the method is applied, to the SH-wave scattering in site with local irregular topography. It is convenient...
文中还利用这一方法处理了由于局部不规则地形引起的SH波的散射问题，波场输入十分方便。
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