Wavelet analysis and neural networks combine together, can examining the position and size of the hole defect, achieving wood defect quantitative testing.
小波包分解和神经网络相结合，能够检测孔洞缺陷的大小和位置，较好的实现了木材孔洞缺陷的定量检测。
2
A method for supersonic wave testing and a new correlative couple device used in drill hole without water are introduced. It is of simplicity, effectivity and lowcost.
提出了一种干孔(超)声波测试方法，介绍了一种相应的干孔耦合装置，使用简便有效，成本低。
3
The related theory has the meaning of directing the process of the down-hole method of shear wave testing.