AI News, Artificial Neural Networks/Neural Network Basics
- On Thursday, October 4, 2018
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Artificial Neural Networks/Neural Network Basics
Artificial Neural Networks, also known as “Artificial neural nets”, “neural nets”, or ANN for short, are a computational tool modeled on the interconnection of the neuron in the nervous systems of the human brain and that of other organisms.
neural nets are a type of non-linear processing system that is ideally suited for a wide range of tasks, especially tasks where there is no existing algorithm for task completion.
With proper training, ANN are capable of generalization, the ability to recognize similarities among different input patterns, especially patterns that have been corrupted by noise.
Each neuron is a multiple-input, multiple-output (MIMO) system that receives signals from the inputs, produces a resultant signal, and transmits that signal to all outputs.
Where ζ is the weighted sum of the inputs (the inner product of the input vector and the tap-weight vector), and σ(ζ) is a function of the weighted sum.
If we recognize that the weight and input elements form vectors w and x, the ζ weighted sum becomes a simple dot product:
The dotted line in the center of the neuron represents the division between the calculation of the input sum using the weight vector, and the calculation of the output value using the activation function.
Neural networks tend to have one input per degree of freedom in the input space, and one output per degree of freedom in the output space.
- On Tuesday, January 15, 2019
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