import tensorflow as tf


        eps = tf.get_variable("eps", (), initializer=tf.constant_initializer(0))
        param_noise_scale = tf.get_variable("param_noise_scale", (), initializer=tf.constant_initializer(0.01), trainable=False)
        param_noise_threshold = tf.get_variable("param_noise_threshold", (), initializer=tf.constant_initializer(0.05), trainable=False)

        # Unmodified Q.
