共查询到20条相似文献，搜索用时 453 毫秒
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建立了供水调度模型,利用基于分解的多目标进化算法,首先将供水调度问题分解为若干单目标,然后根据分布估计的思想对各个单目标建立概率模型,通过采样产生新的个体。利用非支配排序法进行选择,得到最优解。实验表明,该算法对求解供水调度优化问题具有较好的多样性和均匀性,并且降低了算法的计算复杂度。 相似文献
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针对电动汽车充电站规划问题,建立以最小化充电站服务与用户需求综合成本为目标的数学模型,并提出基于文化思想的改进烟花算法求解该问题。将烟花算法嵌入文化算法计算框架中,进行底层搜索寻优,提取其进化过程中的有用信息组成信仰空间知识。信仰空间以粒子群迭代规则更新知识并通过接受函数指导种群空间进化,以提高搜索效率。仿真实验结果证明,文化烟花算法在求解电动汽车充电站规划问题时具有良好的稳定性和较高的求解效率。 相似文献
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多目标进化优化算法 总被引：1，自引：0，他引：1
张一倩 《济南职业学院学报》2008,(4)
多目标进化优化算法可以一次性求解多个非劣解,并具有全局优化能力,成为近年来求解多目标优化问题一个重要的研究方向。本文介绍了几种代表性的多目标进化优化算法,并指出了值得进一步研究的相关问题。 相似文献
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张一倩 《济南教育学院学报》2008,(4):58-58
多目标进化优化算法可以一次性求解多个非劣解,并具有全局优化能力,成为近年来求解多目标优化问题一个重要的研究方向。本文介绍了几种代表性的多目标进化优化算法,并指出了值得进一步研究的相关问题。 相似文献
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《淮北师范大学学报》2017,(2):28-35
模糊环境下,基于非线性效用函数和级别优于关系的分类算法提供一个好的分类决策方法.此方法利用模糊理论及模糊数排序准则将含有三角模糊数的决策模型转换成普通决策模型,再采用加权求解的方法将多目标规划转换成单一目标规划.通过数值实例验证算法的有效性. 相似文献
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针对中小型企业生产车间柔性作业调度问题,采用改进的遗传算法求解最优调度结果。将最大完工时间最小化作为调度目标,对经典遗传算法进行相应的改进。首先利用粒子群算法获取工序序列与粒子参数之间的映射关系,在初始种群中利用混沌映射和反向学习策略以提高初始种群质量;然后提出一种将机器编码和工序编码相结合的分段编码方法,以解决某道工序有多台可选机器加工的问题;最后利用自适应交叉和变异概率提高算法收敛速度。通过对 Brandimarte 设计的 10 组不同规格的基准案例进行仿真实验,得到进化曲线和最优调度方案。实验结果验证了该方法的实用性和有效性。 相似文献
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邱崇丙 《唐山师范学院学报》2014,(1):21-23
汉字的六书,《说文》对“转注”一类,语焉不详。后世学者提及转注,也仅限于许慎所举出的例字。《汉字例说》一文,作者从转注的角度综合考虑,对部分现代常用字作了分析,跟传统的解释有所不同。希望能抛砖引玉,互相切磋,以推进学术研究。 相似文献
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Rachel Zupek 《海外英语》2007,(11):40-41
我们绝大部分人都同意一件事情——我们喜欢金钱。但是你对金钱的喜欢之情足够到让你创立一份事业么?.财富通常被人忽视,主要在于人们不能真正了 相似文献
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《海外英语》2007,(4):36
There are numbers of crossroads on our long and unpredictable life journey where we totally have no idea about which direction to choose. No matter what our decision is, we should not turn back, but face the music and go ahead instead. I am this kind of girl who always does try without regretting, one example is how I dealt with my love. 相似文献
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YANGShiguo 《重庆大学学报(英文版)》2004,3(1):86-88
The problem on the geometrc inequalities involving an n-dimensional simplex and its inscribed simplex is studied. Aninequality is established, which reveals that the difference between the squared circumradius of the n-dimensional simplex andthe squared distance between its circumcenter and barycenter times the squared circumradius of its inscribed simplex is not lessthan the 2(n-1)th power of n times its squared inradius, and is equal to when the simplex is regular and its inscribed siplex is atangent point one. Deduction from this inequality reaches a generalization of n-dimensional Euler inequality indicating that thecircumradius of the simplex is not less than the n-fold inradius. Another inequality is derived to present the relationship betweenthe circumradius of the n-dimensional simplex and the circumradius and inradius of its pedal simplex. 相似文献
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Migration occurs behind a variety of reasons and has a great effect on the whole world. People may migrate in order to improve their economic situation, or in order to escape civil strife, persecution, and environmental disasters. The impact of migration is complex, bringing both benefits anddisadvantages. This paper briefly talks about the causes of migration, the allocation of benefits, and the ways in which individual countries and the international community deal with this important subject. 相似文献
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GUO Bao-feng Xiao Da-wei 《重庆大学学报(英文版)》2005,4(3):129-133
Using virtual reality for interactive design gives a designer an intuitive vision of a design and allows the designer to achieve a viable, optimal solution in a timely manner. The article discusses the process of making the Virtual Reality System of the Humble Administrator＇s Garden. Translating building data to the Virtual Reality Modeling Language （VRML） is by far unsatisfactory. This creates a challenge for computer designers to do optimization to meet requirements. Five different approaches to optimize models have been presented in this paper. The other methods are to optimize VRML and to reduce the file size. This is done by keeping polygon counts to a minimum and by applying such techniques as object culling and level-ofdetail switching. 相似文献
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The awareness of individualism can be traced back to the period of American Revolution when the Declaration of Independence was produced.It expressed basic beliefs concerning freedom,equality,democracy,privacy and the relationship between people and government,which were exactly what the philosophy of individualism mostly dealt with at that time.This paper is to exploit the essence of individualism by analyzing the Declaration .The analysis enables us to reconsider its significance to the issue of America human rights and foreign policies. 相似文献
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Sister Carrie is one of the most controversial characters in American literature.Thought as a "fallen woman" firstly,she was defined as a "new woman" by some critics later. However, by digging into the motivaton behind the whole process of Carrie's "success", the relationship between Carrie and her creator (the author), the social conditions of then American, it can be found that Carrie has never been free-standing on her thought and she has never found her real-sdf even after becoming a famous actress. In a society dominated by mass consumerism Carrie is only an adherent of her own desires. She also is a representative of all those country girls flooded into cities, a symbol and a sacrifice of the urbanization of America in a time countryside was overcome by cities. 相似文献