Callback'lerin bir kombinasyonu

Deep learning modellerinin eğitimi uzun sürebilir, özellikle de daha derin mimarilere ve daha büyük veri kümelerine geçtiğinde. Model iyileştikçe kaydetmek ve artık iyileşmediğinde durdurmak, kaç epoch eğiteceğini düşünme yükünü azaltır. Ayrıca kaydedilmiş bir modeli istediğin zaman geri yükleyip kaldığın yerden eğitime devam edebilirsin.

Model eğitimi ve doğrulama verileri çalışma alanında X_train, X_test, y_train ve y_test olarak mevcut.

Bilgisayarını çalışmaya bırakıp bir kavanoz kurabiye yerken keyfine bakabilmen için EarlyStopping() ve ModelCheckpoint() callback'lerini kullan!

Bu egzersiz

Keras ile Deep Learning'e Giriş

kursunun bir parçasıdır

Kursu Görüntüle

Egzersiz talimatları

EarlyStopping ve ModelCheckpoint callback'lerini tensorflow.keras içinden içe aktar.
'val_accuracy''yi izleyecek ve patience değeri 3 epoch olacak şekilde bir EarlyStopping callback'i olarak monitor_val_acc oluştur.
En iyi modeli best_banknote_model.hdf5 olarak kaydedecek bir ModelCheckpoint callback'i olarak model_checkpoint oluştur.
Modelini, tanımladığın callback'leri içeren bir liste ve doğrulama verisi olarak X_test ile y_test sağlayarak eğit (fit et).

Uygulamalı interaktif egzersiz

Bu örnek kodu tamamlayarak bu egzersizi bitirin.

# Import the EarlyStopping and ModelCheckpoint callbacks
from tensorflow.____.____ import ____, ____

# Early stop on validation accuracy
monitor_val_acc = ____(monitor = ____, patience = ____)

# Save the best model as best_banknote_model.hdf5
model_checkpoint = ____(____, save_best_only = True)

# Fit your model for a stupid amount of epochs
h_callback = model.fit(X_train, y_train,
                    epochs = 1000000000000,
                    callbacks = [____, ____],
                    validation_data = (____, ____))

Kodu Düzenle ve Çalıştır

Bu egzersiz

Keras ile Deep Learning'e Giriş

kursunun bir parçasıdır

IntermediárioNível de habilidade

4.8+

Kursa Ücretsiz Başlayın

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: İkili sınıflandırma Exercise 2: Dolar banknotlarını keşfet Exercise 3: İkili sınıflandırma modeli Exercise 4: Bu dolar sahte mi?Exercise 5: Çok sınıflı sınıflandırma Exercise 6: Çok sınıflı bir model Exercise 7: Veri kümeni hazırlama Exercise 8: Dart atanları eğitme Exercise 9: Softmax tahminleri Exercise 10: Çok etiketli sınıflandırma Exercise 11: Bir sulama makinesi Exercise 12: Birden çok etiketle eğitim Exercise 13: Keras geri çağırımları Exercise 14: History geri çağırımı Exercise 15: Modelini erken durdurma Exercise 16: Callback'lerin bir kombinasyonu

Geçerli Egzersiz

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 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!