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Made with wood, springs and rubber bands, Rich Walker remembers fondly the first robotic hand built by Shadow Robot in the late 1990s.
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优化：随机选基准避免最坏情况 O(n²)
f(x)=(xW1)⊙σ(xW2)
Олеся Мицкевич (Редактор отдела «Силовые структуры»)