#exercise
4 keşif · Açık ağdan seçilmiş keşifler, en yeniden eskiye.
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Feet-stiffening socks could help you run further for longer
The next leap in activewear technology may be socks that squeeze parts of our feet, increasing the efficiency of our gait
New Scientist · EN
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《手解量子化学》练习题 1-1
note “练习题1-1” 判断下面的算子是否厄米（Hermitian）或为厄米算子（Hermite Operator）。 \[[1]\ {d \over dx} \quad [2]\ {\mathrm{i}{d \over dx}} \quad [3]\ {d^2 \over dx^2}\]
zhonger 前端开发者，喜爱运维管理 · ZH
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《手解量子化学》练习题 1-2
note “练习题1-2” 判断下列算子是否可交换？ \[[1]\ [\hat{x},\hat{p}_x] \quad [2]\ [\hat{l}_x, \hat{l_y}] \quad [3]\ [\hat{\boldsymbol{l}}^2, \hat{l}_z]\]
zhonger 前端开发者，喜爱运维管理 · ZH
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How we can exercise more without even trying
Incidental activity can reduce our risk of cardiovascular disease and even death
BBC Future · EN