CS621 : Artificial Intelligence. Pushpak Bhattacharyya CSE Dept., IIT Bombay Lecture 23 Feedforward N/W and Backpropagation Algorithm. Feedforward Network. Limitations of perceptron. Non-linear separability is all pervading Single perceptron does not have enough computing power
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Pushpak BhattacharyyaCSE Dept., IIT Bombay
Feedforward N/W and Backpropagation Algorithm
Ex: Degree - 2 surfaces like parabola
Calculation of XOR
Output units and hidden units are called
- not possible in perceptron due to the discontinuous step function used!
Sigmoid neurons with easy-to-compute derivatives used!
Target output = t, Observed output = o