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一种用于进化算法历史计算数据的高效利用方法 被引量:3
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作者 闫盼 谭瑛 张建华 《计算机工程与科学》 CSCD 北大核心 2016年第1期62-66,共5页
进化算法由于其强大的系统建模能力和空间搜索能力已被广泛应用于许多实际问题的求解中。然而,在算法进化的过程中存在个体适应值重复计算的问题,尤其在解决实际工程中的复杂问题时,适应值的计算会消耗大量时间。为此,利用哈希表的高速... 进化算法由于其强大的系统建模能力和空间搜索能力已被广泛应用于许多实际问题的求解中。然而,在算法进化的过程中存在个体适应值重复计算的问题,尤其在解决实际工程中的复杂问题时,适应值的计算会消耗大量时间。为此,利用哈希表的高速存取能力,将哈希表用于存取适应值的历史计算数据,从而避免优化过程中适应值的重复计算,并且对优化结果没有任何影响。仿真实验结果验证了此方法的有效性。 展开更多
关键词 哈希表 历史计算数据 进化算法
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Reliability evaluation method and algorithm for electromechanical product 被引量:2
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作者 刘勇军 范晋伟 李云 《Journal of Central South University》 SCIE EI CAS 2014年第10期3753-3761,共9页
The reliability of electromechanical product is usually determined by the fault number and working time traditionally. The shortcoming of this method is that the product must be in service. To design and enhance the r... The reliability of electromechanical product is usually determined by the fault number and working time traditionally. The shortcoming of this method is that the product must be in service. To design and enhance the reliability of the electromechanical product, the reliability evaluation method must be feasible and correct. Reliability evaluation method and algorithm were proposed. The reliability of product can be calculated by the reliability of subsystems which can be gained by experiment or historical data. The reliability of the machining center was evaluated by the method and algorithm as one example. The calculation result shows that the solution accuracy of mean time between failures is 97.4% calculated by the method proposed in this article compared by the traditional method. The method and algorithm can be used to evaluate the reliability of electromechanical product before it is in service. 展开更多
关键词 reliability evaluation mean time between failures probability density function electromechanical product
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