Activation Functions

Sigmoid Activation

Sigmoid Activations are a type of activation function for neural networks:

$$f\left(x\right) = \frac{1}{\left(1+\exp\left(-x\right)\right)}$$

Some drawbacks of this activation that have been noted in the literature are: sharp damp gradients during backpropagation from deeper hidden layers to inputs, gradient saturation, and slow convergence.

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Tasks


Task Papers Share
Time Series 38 5.90%
Language Modelling 30 4.66%
Image Classification 20 3.11%
Sentiment Analysis 18 2.80%
Machine Translation 16 2.48%
Object Detection 16 2.48%
Speech Recognition 13 2.02%
Text Generation 12 1.86%
Semantic Segmentation 11 1.71%

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