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。
Simulation tests show that the machine ' s acceleration and deceleration capability is the key factor to the nc machining efficiency and precision when the turning angle between micro - lines is small , and the error of corner machining is the predominant factor when the turning angle increases to certain degree , and the machine ' s maximum driving moment becomes the decisive factor when the turning angle becomes big 通过仿真实验得出：当连续小直线段间拐角较小时，机床加减速性能是影响加工效率和表面精度的最主要因素；当拐角增大到一定程度时，误差的限制成为约束速度提高的主要矛盾；当拐角较大时，机床的最大驱动力矩起到主要作用。
