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陈猛
我觉得不光是楼上提到的问题，我觉得应该是-labels * alpha * ((1 - y_pred) ** gamma) * tf.log(y_pred) - (1 - labels) * (1 - alpha) * (y_pred ** gamma) * tf.log(1 - y_pred).
同问
Thanks a lot, it helps!