FANN中位失败的目的是什么? [英] What is the purpose of bit fail in FANN?

问题描述

即时通讯收到来自Fann的类似回复

im having a response like below from fann

    Epochs            1. Current error: 0.2500066161. Bit fail 4.
    Epochs           58. Current error: 0.0000930788. Bit fail 0.

位失败在这里意味着什么?

what does Bit fail mean here?

推荐答案

位失败限制是允许的预期输出神经元值与实际输出神经元值之间的最大差.

The bit fail limit is the maximum difference between the expected and actual output neuron value that is allowed.The default bit fail limit is 0.35. If the difference between the expected and actual output neuron value is more that the bit fail limit, this counts as 1 bit fail. In the sample output you gave, at 58 epochs all the output neurons gave actual outputs close enough to the expected outputs and hence the bit fail was 0 and training stopped. In other words all the training examples gave outputs that were close enough to the expected outputs. During the first epoch, 4 of the training samples gave outputs resulting in bit fails.

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