如果不确定用哪个激活函数，隐藏层可以先用 ReLU，输出层按任务选择；训练中注意梯度情况，如果梯度消失或爆炸，再考虑替换或调整激活函数。
Los Angeles is finally extending its transit system to the tony streets of Beverly Hills, announcing on Thursday that a 4-mile extension of the D Line subway opens on May 8.，更多细节参见safew官方下载
Smart Engineering Delivers。业内人士推荐im钱包官方下载作为进阶阅读
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