Then damage identification of severity of bolt looseness was studied by utilizing the pattern classification function of the BP neural network.
然后利用BP神经网络的模式分类功能，进行了螺栓松动程度的损伤识别研究。
2
By theoretical analysis and lab test, put forward a kind of new type bolts which may prevent bolt tails from being broken, bolt construction structure's pattern, and bolt made technology.