优点： 更平滑、更稳定，效果普遍优于 ReLU。
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The image comes from a 1997 episode of the Pokémon anime, but it didn't become a viral reaction image until 2018, according to Know Your Meme, when fans began pairing Pikachu’s blank, open-mouthed stare with captions describing obviously avoidable outcomes. It quickly became a universal punchline, transcending Pokémon entirely. Today, Surprised Pikachu isn't just a Pokémon meme. It's internet shorthand.。谷歌浏览器【最新下载地址】对此有专业解读
Must achieve = 99% accuracy on 10,000 random test pairs (held-out, fixed seed)