I am learning about deep learning and neural networks. I have hard time understanding how to design the overall structure of the network. Can you explain how do I choose the things like number of layers or the number of nodes in a layer? Tell me in general about how to choose the overall design of a neural network. Use relatively simple terms that a beginner can understand.
Sure. The overall structure of a neural network is determined by the number of layers, the number of nodes in each layer, and the type of activation function used in each layer.

The number of layers in a neural network is typically determined by the complexity of the problem that the network is trying to solve. For example, a network that is trying to classify images will need more layers than a network that is trying to predict a numerical value.

The number of nodes in each layer is also determined by the complexity of the problem. In general, more nodes will allow the network to learn more complex relationships between the input data and the output data. However, too many nodes can also lead to overfitting, which is when the network learns the training data too well and is unable to generalize to new data.

The type of activation function used in each layer also affects the overall structure of the network. Activation functions are used to introduce non-linearity into the network, which allows the network to learn more complex relationships between the input data and the output data.

There are many different types of activation functions, and the best type to use for a particular problem will depend on the specific characteristics of the problem.

In general, the overall structure of a neural network is determined by a combination of trial and error and expert knowledge. There is no single best way to design a neural network, and the best approach will vary depending on the specific problem that the network is trying to solve.

Here are some additional tips for designing neural networks:

* Start with a small network and gradually increase the size of the network as needed.
* Use a variety of activation functions to see which ones work best for your problem.
* Use regularization techniques to prevent overfitting.
* Use a validation set to evaluate the performance of your network on unseen data.
* Experiment with different hyperparameters, such as the learning rate and the batch size.
* Be patient! It can take time to find the best design for your neural network.