The set of points is called a level surface . 這種點(diǎn)的集合被稱為等位面。
At each crossing of an equipotential and a field line, the two are perpendicular . 在等位面與電力線的每個(gè)交點(diǎn),兩者是垂直的。
The actual equipotential surface of the earth that corresponds to sea level is called the geoid . 相當(dāng)海平面的地球?qū)嶋H等位面稱為重力平面。
The tsf method combines efficiently llsf and tri - cubic spline interpolation , learns from others " strong points to offset one ' s weaknesses , so has rapidity and high accuracy of computation and is suitable for contour surface drawing in real - time . 3 該方法綜合多元樣條擬合法與局部加權(quán)最小二乘法,揚(yáng)長(zhǎng)避短,不僅保證了逼近精度,提高了計(jì)算速度,而且加密計(jì)算的結(jié)果可直接應(yīng)用于等位面的實(shí)時(shí)顯示。
It evolves into a semi - detached binary after about 2 . 7 myr , and its secondary fills its roche robe after 34 . 5 myr , and then evolves into a contact binary . contact phase is characterized by energy transfer between the components through a common envelope 初始模型是一個(gè)主星十分接近其內(nèi)臨界等位面的分離雙星,大約演化2 . 7 10 ~ 6年成為半接雙星,經(jīng)過3 . 45 10 ~ 7年次星開始充滿洛希瓣,而演化成相接雙星。