For comparing and analyzing the influence of attenuation relationship, the attenuation relationship of earthquake intensity created by the error back propagation approach was adopted in mapping.
为了对比分析衰减关系的影响，编图中也采用了借助误差向后传播算法建立的地震烈度衰减关系。
Based on error back propagation (BP) arithmetic, many improvements are put forward because of its disadvantages.
在误差反向传播(BP)算法的基础上，针对其不足提出了多种改进算法。
The mathematic frame of the neural network and error back propagation algorithm were introduced.
介绍了小波神经网络的数学框架及其误差反向学习算法。
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