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Paperium
Paperium

Posted on • Originally published at paperium.net

Improving neural networks by preventing co-adaptation of feature detectors

How Dropout helps neural networks learn better

Big computer models often do well on examples they saw, but fail on new ones — this is called overfitting.
A simple trick fixes much of that: during practice the model randomly turns off many parts.
This dropout forces each little piece to work by itself, so it can't hide behind others.
In plain words it makes each feature useful in lots of situations, not only when its friends are present.
The tiny parts, or neurons, learn signals that help more often, and so the whole system guesses right more when shown new pictures or voices.
The change sounds small but it gives big gains on real tasks, sometimes beating previous scores.
You can think of it like training a team where every player must know the game, not just rely on a single star.
Try this and models tend to become more steady and reliable, even if the training set was small or noisy.
It is simple, surprisingly powerful, and easy to add to many learning setups.

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Improving neural networks by preventing co-adaptation of feature detectors

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