theano_backend.py 文件源码

def relu(x, alpha, max_value):
    y = T.nnet.relu(x, alpha)
    if max_value is not None:
        y = T.minimum(y, max_value)
    return y

### objectives
# cross entropy loss. y_pred, y_gt should be 2D, DO NOT USE tensor.nnet.categorical_crossentropy