Lecture 21: Some Examples of Neural Networks
IIT Kharagpur July 2018・2 minutes read
Artificial neural networks are structured with layers of neurons, including input, hidden, and output layers, using different transfer functions and connecting weights denoted by matrices. Training neural networks involves updating weights and transfer function coefficients through iterations, with the steepest descent method used to minimize prediction error through adjustments based on the error gradient and learning rate.
Insights
- Artificial neural networks mimic the structure of biological neurons with layers for input, hidden, and output, utilizing specific transfer functions and connecting weights denoted by matrices V and W.
- Training neural networks involves adjusting connecting weights and transfer function coefficients iteratively to optimize performance, with error calculated between target and actual outputs, minimized using optimization algorithms like the steepest descent method.
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Recent questions
How are artificial neural networks structured?
Artificial neural networks consist of layers of neurons, including input, hidden, and output layers.
What functions are used in neural network layers?
Different transfer functions like linear, log sigmoid, and tan sigmoid functions are used in neural network layers.
How are inputs processed in neural networks?
Inputs are normalized using formulas to scale them to a range of 0 to 1 or -1 to 1 before being multiplied with connecting weights and passed through transfer functions.
What is involved in training neural networks?
Training neural networks includes updating connecting weights and transfer function coefficients through iterations to improve performance.
How is prediction error minimized in neural networks?
Prediction error is minimized using optimization algorithms like the steepest descent method, which updates weights and coefficients based on the error gradient and a learning rate.
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