一类分叉函数的向量化计算

THE PARALLEL EVALUATION OF A CLASS OF BRANCHED FUNCTIONS

分叉函数是科学计算中实际存在和经常出现的一类函数.许多科学研究和工程设计的计算课题都含有不同形式的分叉函数,它们在实际运算中占着相当重要的地位. 分叉函数是一类典型的顺序计算问题.以计算最简单的二分叉函数为例,通常要顺序地执行下列三个方面的操作:

This paper is mainly aimed at a class of typical branched functions which occu?frequently on the numerical calculation of two-dimensional unsteady fluid dynamics.The parallel algorithm of the branched functions and the design technique of thevector programs for use on the YH-1 vector computer are discussed. The serialcomputational problems of the branched functions are completely vectorized into theparallel ones, so that the running velocities are Considerably raised.