开弧 meaning in English

free burning arc
open arc

Study and application of the involute arc of the starting curve line
弯道起跑线渐开弧的研究与应用
We extend this method to the problem of a domain which boundary is an open arc or an open segment . in this paper , we simulate the singularity of solution in extreme point of open arc or open segment by singular element
本文还把此方法推广到求解区域边界是直线段或者开弧段的情况，采用引入奇异边界单元的方法来模拟解在开边界端点附近的奇异性。
With fortran power station 4 . 0 , we make galerkin boundary element method program for solving laplace equation on region which boundary is a closed curve or an open arc , and the numerical experiments also prove this method is reliable . last we test the error of galerkin boundary element by numerical experimentation
最后利用fortranpowerstation4 . 0程序语言分别编写了用galerkin方法求解区域边界为闭曲线及区域边界为直线段或开弧段laplace方程的计算机程序，通过几个算例证明了该方法是有效的、是可行。