改进的并行ORTHOMIN(m)算法

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通过利用ORTHOMIN(m)算法的固有性质,消除ORTHOMIN(m)算法的内积计算数据相关性,给出了一种改进的OR-THOMIN(m)(IORTHOMIN(m))算法。同0RTHOMIN(m)算法对比,IORTHOMIN(m)算法与ORTHOMIN(m)算法有相同的收敛性,在基于MPI的分布式存储并行机群上进行并行计算时,同步开销次数减少为ORTHOMIN(m)算法的一半。数值计算结果与理论分析表明改进的IORTHOMIN(m)算法的性能要扰于ORTHOMIN(m)算法。
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