What are hyperparameters?
A network structure is determined by several variables. Those variables that define a network structure are called hyperparameters. These variables also dictate how the network structure is trained. Hyperparameters are decided before optimizing the bias and weights.
Hyperparameters related to Network structure
Machine learning links the concept of hyperparameters to network structures. The network is an integral part of this technologically driven world and hyperparameters are linked to the networks while Artificial Intelligence helps the neurons to work on their own without human intervention. To understand this concept, the following terms need to be understood first:
- Hidden layers and units: Hidden layers are those layers there between the input and output layers. The hidden units with regular techniques can increase system accuracy.
- Dropout: It is a regularization method to avoid an unnecessary increase in validation accuracy. A small dropout value of around 20% to 50% of neurons is used at the point of starting. To increase the efficiency of your performance, you should use a larger network with more neurons.
- Initialization of network weight: It is better if you use a different scheme for weight initialization in accordance with the activation function that is embedded in every layer.
- Activation function: To introduce the non-linearity of models, the activation function is applied. With the help of machine learning, deep learning models learn to predict non-linear boundaries. The output layer uses Sigmoid while performing binary functions whereas the output layer uses softmax for performing multi-class predictions.
Neural Network (Deep Learning)
The neural network is a technique of deep learning that helps to build a training data model for the prediction of unseen data applied to many layers using several neurons. This is quite similar to machine learning algorithms but the only difference is that diet machine learning algorithms don't use multiple layers. Because several layers are used in the neural network method, it is called deep learning.
Different hyperparameters are required for dealing with different datasets. To find the possible sets of hyperparameters to use accurately for each data set, it is important to tune the hyperparameters. It is important to choose the right number of neurons and hyperparameters so that the accuracy of the data set is maintained.
Tune the Hyperparameters
For tuning the hyperparameters and achieving accurate results you need to keep the following points in mind:
- Notice the number of neurons present in each layer.
- The number of neurons in each layer may be the same so that the calculation can be easy and precise.
- To deal with a complex level, you need more neurons to predict the task.
- Followed by the activation function, all these new dance work between the hidden layers to predict better results for the datasets.
The conversion of the input values to output values in the dataset takes place with the help of the activation function. The output values of one dataset when received are then passed on to the next layer as input values.
Another hyperparameter is the learning rate optimizer. To reach the goal of minimum loss, the steps and layers of a model are controlled by the learning rate function. The lower the learning rate, the better the chances to find the minimum loss function.
Conclusion
The initialization of hyperparameters and neural networks helps to advance machine learning technology and aims at achieving new milestones in Data Science. It has come a long way and to date, data scientists are trying to modify and develop the concept even more.