The following snippet shows the usage of Adam with Keras:

from keras.optimizers import Adam

...

adam = Adam(lr=0.0001, beta_1=0.9, beta_2=0.9, epsilon=1e-6, decay=1e-2)

model.compile(optimizer=adam,
              loss='categorical_crossentropy',
              metrics=['accuracy'])

The forgetting factors, μ₁ and μ_2, are represented by the parameters beta_1 and beta_2. All the other elements are the same as the other algorithms.