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In this paper, a new constraint handling method based on a modified AEA (Alopex-based evolutionary algorithm) is proposed. Combined with a new proposed ranking and selecting strategy, the algorithm gradually converges to a feasible region from a relatively feasible region. By introduction of an adaptive relaxation parameter μ, the algorithm fully takes into account different functions corresponding to different sizes of feasible region. In addition, an adaptive penalty function method is employed, which adaptively adjust the penalty coefficient so as to guarantee a moderate penalty. By solving 11 benchmark test functions and two engineering problems, experiment results indicate that the proposed method is reliable and efficient for solving constrained optimization problems. Also, it has great potential in handling many engineering problems with constraints, even with equations. 相似文献
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后张梁灌浆材料及工艺对结冰压的影响 总被引:1,自引:0,他引:1
研究了水灰比mw/mc、引气剂、养护时间及养护温度对灌浆材料结冰压的影响.结果表明:水灰比越大,灌浆材料的结冰压越大;养护时间少于24 h的非引气灌浆材料在各个水灰比下均存在较大的结冰压;非引气灌浆材料及水灰比大于0.32的引气灌浆材料在15℃下养护24 h或5℃下养护40 h,其结冰压有较大幅度的降低;掺加引气剂可显著降低灌浆材料的结冰压,当水灰比小于0.36时,掺引气剂的作用尤其明显. 相似文献
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Tae-Hyun?WonEmail author Gi-Hyun?Hwang June?Ho?Park Man?Hyung?Lee 《Journal of Mechanical Science and Technology》2003,17(2):187-196
In this paper, a new methodology of evolutionary computations - An Adaptive Evolutionary Algorithm (AEA) is proposed. AEA
uses a genetic algorithm (GA) and an evolution strategy (ES) in an adaptive manner in order to take merits of two different
evolutionary computations : global search capability of GA and local search capability of ES. In the reproduction procedure,
the proportions of the population by GA and ES are udaptively modulated according to the fitness. AEA is used for designing
fuzzy logic controller (FLC) for a high-angle-of-attack flight system for a super-maneuverable version of F-18 aircraft. AEA
is used to determine the membership functions and scaling factors of an FLC. The computer simulation results show that the
FLC has met both robustness and performance requirements. 相似文献
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本文根据试验成果分析了引气剂对改善混凝土性能的作用 ,并提出了采用引气剂应注意的事项 ,最后强调 ,引气剂在渠道混凝土衬砌抗冻胀破坏中 ,具有广阔的应用前景。 相似文献
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本文重点论述了在AEA膨胀剂中复掺有机短纤维控制裂缝的技术关键,有机短纤维和膨胀剂的最佳掺量,复掺后的限制膨胀率,砂浆的抗压及抗折强度等技术问题。 相似文献
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Gang Chen Xiaomin Cheng Jianpeng Chen Xiangrong She JiaQi Qin Jian Chen 《Computational Intelligence》2024,40(1):e12626
Nowadays, manual event assignment for Chinese mayor's hotline is still a problem of low efficiency. In this paper, we propose a computer-aided event assignment method based on hierarchical features and enhanced association. First, hierarchical features of hotline events are extracted to obtain event encoding vectors. Second, the fine-tuned RoBERTa2RoBERTa model is used to encode the “sanding” responsibility texts of Chinese local departments. Third, an association enhanced attention (AEA) mechanism is proposed to capture the correlation information of the “event-sanding” splicing vectors for the sake of obtaining matching results of “event-sanding,” and the matching results are input into the classifier. Finally, the assignment department for is obtained by a department selection module. Experimental results show that our method can achieve better performance compared with several baseline methods on HEAD (a dataset we construct independently). The ablation experiments also demonstrate the validity of each key module in our method. 相似文献
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着眼于AEA(Alopex-based evolutionary algorithm)算法本身的不足,构造出一种融合了差分进化算法和AEA的改进型算法--MAEA(modified AEA).MAEA算法将改进后的差分进化算法嵌入到AEA中,改进AEA算法中种群的生成方式,提高算法的寻优能力.改进的算法不仅拥有启发搜索和确定性搜索的优点,同时还增加了种群的多样性,使算法能够更好地进行全局和局部搜索.通过21个标准函数的测试结果表明,该算法较标准AEA算法、差分进化算法的性能有较大提升.进一步和当前具有代表性的先进算法(ISDEMS)的比较结果表明,MAEA算法有较高的精确度和稳定性.将算法用于发酵动力学模型参数的估计,通过优化得到了较好的结果,验证了本文提出的算法的可行性和有效性. 相似文献
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掺粉煤灰和引气剂混凝土渗透性与强度的关系 总被引:6,自引:0,他引:6
与同强度等级的普通混凝土相比,掺粉煤灰混凝土的28d渗透系数较高,而90d渗透系数较低;混凝土引气后其抗渗性能有较大幅度的提高.在分析了各种类型混凝土的渗透系数与抗压强度之间的相关性后发现:普通混凝土抗压强度与渗透系数的线性相关性较好,而粉煤灰混凝土、引气混凝土及粉煤灰引气混凝土抗压强度与渗透系数的线性相关性相对较差。 相似文献