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激波/边界层干扰流动数值模拟格式的应用研究 被引量:2
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作者 肖志祥 陈海昕 +1 位作者 李凤蔚 符松 《西北工业大学学报》 EI CAS CSCD 北大核心 2004年第6期800-805,共6页
通过 Newton类型的伪时间子迭代格式实现第 n时间层至第 n+ 1时间层的精确推进 ,发展了一种具有二阶时间精度、全隐式 LU- SGS- τTS方法求解雷诺平均 Navier- Stokes方程组( RANS) ;同时还对比了显式四步 R- K- τTS和原始 LU- SGS方... 通过 Newton类型的伪时间子迭代格式实现第 n时间层至第 n+ 1时间层的精确推进 ,发展了一种具有二阶时间精度、全隐式 LU- SGS- τTS方法求解雷诺平均 Navier- Stokes方程组( RANS) ;同时还对比了显式四步 R- K- τTS和原始 LU- SGS方法的计算结果。采用改进的Jameson中心、Van Leer和 Roe格式对 N- S方程组的对流项进行空间离散 ;迎风格式通过MUSCL插值提高格式精度 ,并采用光滑且连续可微的通量限制器消除求解过程中的数值振荡。利用上述时间方法和空间格式进行组合 ,分别对二维翼型、三维机翼激波 /边界层干扰流动中的几个极具挑战性的状态进行模拟 ,通过结果相互间及与实验结果的对比 。 展开更多
关键词 τTS(pseudo-time sub-iteration)方法 激波/边界层干扰 MUSCL(Monotone UPSTREAM Centered Scheme for CONSERVATION Laws)
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Novel Adaptive Simulated Annealing Algorithm for Constrained Multi-Objective Optimization 被引量:4
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作者 Chuai Gang Zhao Dan Sun Li 《China Communications》 SCIE CSCD 2012年第9期68-78,共11页
In recent years, sinmlated annealing algo-rithms have been extensively developed and uti-lized to solve nmlti-objective optimization problems. In order to obtain better optimization perfonmnce, this paper proposes a N... In recent years, sinmlated annealing algo-rithms have been extensively developed and uti-lized to solve nmlti-objective optimization problems. In order to obtain better optimization perfonmnce, this paper proposes a Novel Adaptive Simulated Annealing (NASA) algorithm for constrained multi-objective optimization based on Archived Multi-objective Simulated Annealing (AMOSA). For han-dling multi-objective, NASA makes improverrents in three aspects: sub-iteration search, sub-archive and adaptive search, which effectively strengthen the stability and efficiency of the algorithnm For handling constraints, NASA introduces corresponding solution acceptance criterion. Furtherrrore, NASA has also been applied to optimize TD-LTE network perform-ance by adjusting antenna paranleters; it can achieve better extension and convergence than AMOSA, NS-GAII and MOPSO. Analytical studies and simulations indicate that the proposed NASA algorithm can play an important role in improving multi-objective optimi-zation performance. 展开更多
关键词 simulated annealing constrained rmlti-objective optimizaztion adaptive sub-iteration search-ing sub-archive PARETO-OPTIMAL
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