局域波法能在时频图上正确地描述非平稳非线性信号的局部特征 .但由于信号边界的不确定性 ,现有的边界处理方法都不能有效地消除边界效应 ,造成时频图内两边端点附近信号的能量扩散 .因此精确估计边界值是局域波法的关键问题 .采用边界波形匹配的方法预测边界值 ,无论边界点是极值点或非极值点 ,都能有效地消除边界效应 Local wave method can correctly describe the local characteristics of non-stationary non-linear signals on time-frequency map.But due to the uncertainty of signal boundary, the existing boundary treatment methods can not effectively eliminate the boundary effect, So the accurate estimation of the boundary value is the key issue of the local wave method.Using the boundary waveform matching method to predict the boundary value can effectively eliminate the boundary point whether it is the extreme point or the non-extreme point Boundary effect