!!! Overview [1]
[{$pagename}] is a [Regularization] method where randomly selected [Artificial Neurons] are ignored during training. 

They are "dropped-out" randomly. This means that their contribution to the activation of downstream neurons is temporarily removed on the [Forward propagation] and any [weight] updates are also __not__ applied to the [Artificial Neurons] on the [Backpropagation].

As an [Artificial Neural network] learns, neuron [weights] settle into their context within the [Artificial Neural network]. [Weights] of neurons are tuned for specific features providing some specialization. Neighboring neurons become to rely on this specialization, which if taken too far can result in a fragile [Machine Learning model] too specialized to the [Training dataset] which is referred to as [Overfitting]. This reliant on context for a neuron during training is referred to complex co-adaptations.

You can imagine that if [Artificial Neurons] are randomly dropped out of the network during training, that other [Artificial Neurons] will have to step in and handle the representation required to make predictions for the missing [Artificial Neurons]. This is believed to result in multiple independent internal representations being learned by the network.

The effect is that the network becomes less sensitive to the specific [weights] of neurons. This in turn results in a network that is capable of better generalization and is less likely to [Overfitting].

!! More Information
There might be more information for this subject on one of the following:
[{ReferringPagesPlugin before='*' after='\n' }]
* [#1] - [Dropout Regularization in Deep Learning Models With Keras|https://machinelearningmastery.com/dropout-regularization-deep-learning-models-keras/|target='_blank'] - based on information obtained 2018-01-03-