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学习率、网络结构、参数初始化之间的相互影响关系

Hyper parameter search

Overview

accuracy_test accuracy_train

不同学习率

不同学习率_test 不同学习率_legend 不同学习率_train 结论: 合适的学习率十分重要,影响模型性能的上限。

不同网络结构不同参数初始化

不同网络结构不同参数初始化_test 不同网络结构不同参数初始化_legend 不同网络结构不同参数初始化_train 结论:

  1. 合适的参数初始化十分重要,影响模型性能的上限。
  2. 在合适的参数初始化下,网络结构也并非越复杂越好,而是要求“合理”(即卷积层和全连接层的数量的合理搭配)
  3. 网络结构复杂会使学习过程变慢。

Top

top_test top_legend top_train 结论:

  1. 相同参数初始化和相同网络结构下,较大的学习率会加速学习过程。
  2. 不同的参数初始化,合适的学习率是不同的。

结论

学习率、网络结构、参数初始化三者之间需要合理搭配,才能使学习过程顺畅地进行,并最终提升性能。

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