Improved BP algorithm and its application in detection of pavement crack
Improved BP algorithm and its application in detection of pavement crack
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发表时间：
2010
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通讯作者：
Xu Ting
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作者：
Xu Ting
针对传统BP算法抗干扰能力差、学习速度慢、易陷入局部极小等缺点，提出了一种变激活函数斜率的改进BP算法，提出了一种新的传递函数，设计了一种复合误差函数，并采用分层动态调整学习速度的方法，作为一个真实的应用，采用改进的BP算法对路面裂缝进行检测，结果表明：改进的BP算法能有效地提高检测速度30%，总均方误差降低0.812 5，可以很好地应用于路面裂缝病害的自动检测。
Classical BP algorithm has the shortcomings such as bad anti-jamming ability,low learning rate and easily plunging into local minimum.In order to overcome these drawbacks,this paper put forward an improved BP algorithm with varying slope of activation function,presented a new kind of transfer function,designed a complex error function and adopted a new method,which can dynamically adjust different learning rate with separating layers.As a real application,the results of pavement crack detection by the improved BP algorithm are reported.The results show that: the proposed algorithm can efficiently improve detection speed by 30%;and reduces the total mean squares error 0.812 5;the new algorithm can be well applied in automatic pavement crack distress's detection.2 tabs,4 figs,11 refs.