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In this paper, we explore a parallel block multigrid preconditioner based on factorization of the coefficient matrix generated in three-dimensional unstructured grids system. This preconditioner is robust with respect to the magnitude of the mesh size and the coefficient complexity, apply smoothed aggregation algebraic multigrid which using block lower-upper symmetric Gauss-Seidel(BLU-SGS) as smoother...
As a successful metaheuristic, ant colony optimization (ACO) performs excellently in solving most combinatorial optimization problems. However, the ACO algorithm needs considerable computational time and resources when the complexity of the problem increases. Parallel implementing is a good ideal to speedup it. A new parallel ant colony optimization (PACO) algorithm is presented, which has the characteristics...
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