The use of Square shaped wheels in ship harbouring using an inverted catenary surface
Riding around on a flat tire is no fun. It feels really bumpy. But a square wheel may be the ultimate flat tire. There's no way it can roll over a flat, smooth road without jolting the rider again and again. Here, I have constructed a bicycle with square wheels. It's a weird contraption, but you can ride it perfectly smoothly. My secret is the shape of the road over which the wheels roll. A square wheel can roll smoothly, keeping the axle moving in a straight line and at a constant velocity, if it travels over evenly spaced bumps of just the right shape. This special shape is called an inverted catenary. A catenary is the curve describing a rope or chain hanging loosely between two supports. Turn the curve upside down, and you get an inverted catenary--just like one of the bumps in my road. Make the road out of a whole bunch of those bumps all in a row, and you can take your square-wheeled bike for a quick spin. Just as a square rides smoothly across a roadbed of linked inverted catenaries, other regular polygons, including pentagons and hexagons, also ride smoothly over curves made up of appropriately selected pieces of inverted catenaries. As the number of a polygon's sides increases, these catenary segments get shorter and flatter. Ultimately, for an infinite number of sides (in effect, a circle), the curve becomes a straight, horizontal line. In the end, I conclude with possible enhancements in the project that might take us to a whole new world.
電梯問題
本研究主要是研究「電梯問題」: 令某棟建築內任兩層樓都至少有一部電梯連接的建築稱為全能建築,若某棟建築內有m部電梯,每部電梯停n層,f (m, n)為使這棟建築成為全能建築的最高層數。對於不同的m, n,f (m, n)的值為何? 本研究一開始先以一些參考資料為基礎,試著整理出其中未完成的部份。接著,我們針對了一些個別的f (m, n),具體求出其值。令某棟建築內任兩層樓都恰有一部電梯連接的建築稱為完美建築,我們引入了一個新的函數g (n, k)=m,得到了一個與完美建築有關的定理。另外,我們還利用一些構造方法,求出了所有g (3, k)的值。 在這次的研究中,我們成功運用了各種不同的構造手法,得到了一些相關的結果。至於是否能將這些構造方法運用在求出一般的f (m, n)之值?這是我們將繼續探究的課題。