附加动量法是在BP的基础上，在每一个权值变化上加上一项正比于前一次权值变化的值，且根据BP来产生新的权值变化。实质是将最后一次权值变化的影响通过一个动量因子来传递。(The additional momentum method is based on the BP and adds a value proportional to the previous weight change in each weight change, and generates new weight changes based on the BP. In essence, the influence of the last weight change is passed through a momentum factor.)