Previous Year Question Papers CST 395 Neural Network and Deep Learning KTU

 

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Neural Networks and Deep Learning CST 395 CS 5TH Semester Honors Course notes - Dr Binu V P

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Capacity, Overfitting and Underfitting

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The central challenge in machine learning is that we must perform well on new, previously unseen inputs—not just those on which our model was trained. The ability to perform well on previously unobserved inputs is called generalization. Typically, when training a machine learning model, we have access to a training set, we can compute some error measure on the training set called the training error, and we reduce this training error. So far, what we have described is simply an optimization problem. What separates machine learning from optimization is that we want the generalization error , also called the test error , to be low as well. The generalization error is defined as the expected value of the error on a new input. Here the expectation is taken across different possible inputs, drawn from the distribution of inputs we expect the system to encounter in practice. We typically estimate the generalization error of a machine learning model by measuring its performance on a test s...
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