"Tuning frictional behavior on the fly has been a long-standing engineering dream," said co-author Katia Bertoldi of Harvard University. "This new insight into how surface geometry governs slip pulses paves the way for tunable frictional metamaterials that can transition from low-friction to high-grip states on demand.” In addition, the dynamics revealed by these results are similar to those of tectonic faults and thus give scientists a new model for the mechanics of earthquakes, according to their new paper published in the journal Nature.
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叶师傅用的“码”,就是我们正在试行的“建筑港智能调度系统”。在这里,我们为每位工友开设了一个“数字身份证”。这不仅是档案,更是“信用账户”。每一次准时出勤、每一项优质完工,都会及时量化为明确的价值,储存进“信用储蓄”。
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Сайт Роскомнадзора атаковали18:00
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