Batch normalization effects

Batch normalization tends to increase the learning speed of our models and make their learning curves more stable. Let's see how two identical models with and without batch normalization compare.

The model you just built batchnorm_model is loaded for you to use. An exact copy of it without batch normalization: standard_model, is available as well. You can check their summary() in the console. X_train, y_train, X_test, and y_test are also loaded so that you can train both models.

You will compare the accuracy learning curves for both models plotting them with compare_histories_acc().

You can check the function pasting show_code(compare_histories_acc) in the console.

Diese Übung ist Teil des Kurses

Introduction to Deep Learning with Keras

Anleitung zur Übung

Train the standard_model for 10 epochs passing in train and validation data, storing its history in h1_callback.
Train your batchnorm_model for 10 epochs passing in train and validation data, storing its history in h2_callback.
Call compare_histories_acc passing in h1_callback and h2_callback.

Interaktive Übung

Versuche dich an dieser Übung, indem du diesen Beispielcode vervollständigst.

# Train your standard model, storing its history callback
h1_callback = standard_model.fit(____, ____, validation_data=(____,____), epochs=____, verbose=0)

# Train the batch normalized model you recently built, store its history callback
h2_callback = batchnorm_model.fit(____, ____, validation_data=____, epochs=____, verbose=0)

# Call compare_histories_acc passing in both model histories
compare_histories_acc(____, ____)

Code bearbeiten und ausführen

Diese Übung ist Teil des Kurses

Introduction to Deep Learning with Keras

Mittlere SchwierigkeitSchwierigkeitsgrad

4.8+

Kurs kostenlos starten

In this first chapter, you will get introduced to neural networks, understand what kind of problems they can solve, and when to use them. You will also build several networks and save the earth by training a regression model that approximates the orbit of a meteor that is approaching us!

Exercise 1: What is Keras?Exercise 2: Describing Keras Exercise 3: Would you use deep learning?Exercise 4: Your first neural network Exercise 5: Hello nets!Exercise 6: Counting parameters Exercise 7: Build as shown!Exercise 8: Surviving a meteor strike Exercise 9: Specifying a model Exercise 10: Training Exercise 11: Predicting the orbit!

By the end of this chapter, you will know how to solve binary, multi-class, and multi-label problems with neural networks. All of this by solving problems like detecting fake dollar bills, deciding who threw which dart at a board, and building an intelligent system to water your farm. You will also be able to plot model training metrics and to stop training and save your models when they no longer improve.

Exercise 1: Binary classification Exercise 2: Exploring dollar bills Exercise 3: A binary classification model Exercise 4: Is this dollar bill fake ?Exercise 5: Multi-class classification Exercise 6: A multi-class model Exercise 7: Prepare your dataset Exercise 8: Training on dart throwers Exercise 9: Softmax predictions Exercise 10: Multi-label classification Exercise 11: An irrigation machine Exercise 12: Training with multiple labels Exercise 13: Keras callbacks Exercise 14: The history callback Exercise 15: Early stopping your model Exercise 16: A combination of callbacks

In the previous chapters, you've trained a lot of models! You will now learn how to interpret learning curves to understand your models as they train. You will also visualize the effects of activation functions, batch-sizes, and batch-normalization. Finally, you will learn how to perform automatic hyperparameter optimization to your Keras models using sklearn.

Exercise 1: Learning curves Exercise 2: Learning the digits Exercise 3: Is the model overfitting?Exercise 4: Do we need more data?Exercise 5: Activation functions Exercise 6: Different activation functions Exercise 7: Comparing activation functions Exercise 8: Comparing activation functions II Exercise 9: Batch size and batch normalization Exercise 10: Changing batch sizes Exercise 11: Batch normalizing a familiar model Exercise 12: Batch normalization effects

Aktuelle Übung

Exercise 13: Hyperparameter tuning Exercise 14: Preparing a model for tuning Exercise 15: Tuning the model parameters Exercise 16: Training with cross-validation

It's time to get introduced to more advanced architectures! You will create an autoencoder to reconstruct noisy images, visualize convolutional neural network activations, use deep pre-trained models to classify images and learn more about recurrent neural networks and working with text as you build a network that predicts the next word in a sentence.

Exercise 1: Tensors, layers, and autoencoders Exercise 2: It's a flow of tensors Exercise 3: Neural separation Exercise 4: Building an autoencoder Exercise 5: De-noising like an autoencoder Exercise 6: Intro to CNNs Exercise 7: Building a CNN model Exercise 8: Looking at convolutions Exercise 9: Preparing your input image Exercise 10: Using a real world model Exercise 11: Intro to LSTMs Exercise 12: Text prediction with LSTMs Exercise 13: Build your LSTM model Exercise 14: Decode your predictions Exercise 15: Test your model!Exercise 16: You're done!