加速负载,加速载重;
However, with a fixed momentum parameter, the momentum term will have an accelerating effect only if the current downhill gradient of the error function& E_ ω( k) and the last change in weight △ω( k-1) has a similar direction.
尽管如此,只有当目前的梯度下降方向与上一步的权值改变的方向相近时,这种动量项系数为正常数的BPM算法才具备加速的功能。
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