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夸父追日的故事我们听得多了,就会以为它很平常。然而,学习了地球运动方面的知识后,反观夸父追日,我们应该追问一句:夸父在地球上追日是否可行,他是怎样追日的,他的追日办法是不是最优的,我们能不能为夸父设计一个更为可行和合理的方案? 所谓的“最优”追日方案的设计,就是在太阳相对追日者始终不落(相对于追日者的太阳高度不小于零)的条件下的速度优化。首先,我们知道,与其说是追日,不如说是和晨昏线赛跑,只要追日者的移动速度不小于晨昏线在地球表面的移动速度就可以满足要求。而晨昏线的移动速度和该地的自转线速度相等,我们又知道,地球自转线速度是和纬度的高低成反比的。这就得出了设计的第一原则:尽量靠近高纬地区追日。
We listened to the story of Kuafu and chased it. We thought it was normal. However, after studying the knowledge of the Earth’s movement, we must ask the following question: Is it possible to praise Dafa on the Earth? How does he catch up with Japan? His method of tracing the sun is not optimal. Can we design a more feasible and reasonable plan for Kuafu? The design of the so-called “optimal” sun-tracking program is that the relative sun catchers will never fall (the solar altitude relative to the sun-trackers is not less than zero). ) Speed optimization under the conditions. First of all, we know that instead of chasing the sun, it is better to race against the light-darkness line, as long as the speed of the sun-trackers is not less than the movement speed of the light-dark line on the surface of the earth. The speed of the twilight line is equal to the rotation speed of the land, and we know that the line speed of the earth is inversely proportional to the altitude. This led to the first principle of design: Try to catch up with the high-latitude region.