原文传递
Where there's awheel…
| 题名： | Where there's awheel… |
| 正文语种： | eng |
| 摘要： | Schroedinger's cat is a strange creature that inhabits the hazy borderline between quantum mechanics and scientific philosophy. Quantum physicist Erwin Schroedinger invented a 'thought experiment' where a cat was trapped in a sealed container with a vial of poison, and a small radioactive source with a Geiger-counter. If radioactive decay was detected, the Geiger-counter activated a trigger that released the poison and killed the cat. Rather than advocating a bizarre form of animal cruelty, Schroedinger was trying to illustrate a key issue in quantum mechanics: that measuring a quantum wave causes its function to collapse, and the properties of a quantum particle such as position, velocity and rotation don't exist until they are measured. Measurement therefore causes disruption of whatever it is that the observer is trying to measure. That's a phenomenon that will be all too familiar to technicians and engineers charged with preventing wheels from becoming detached from heavy vehicles. The only way to be sure that the wheel is properly fixed to the hub is to remove it, clean and inspect the wheel, hub and fastenings, and reassemble. The trouble is, experience shows that a wheel is most likely to become detached shortly after it has been fitted, as the studs can relax and release the tension holding the wheel to the hub. |
| 出版年： | 2023 |
| 期刊名称： | Transport engineer |
| 期： | Nov. |
| 页码： | 21-22 |
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