针对标准均衡优化算法(EO)存在全局搜索和局部搜索的平衡能力不足以及易陷入局部最优的问题,提出了一种基于可变生成概率和多差分柯西变异的均衡优化算法(Variable generation probability and multi-difference Cauchy variation equil...针对标准均衡优化算法(EO)存在全局搜索和局部搜索的平衡能力不足以及易陷入局部最优的问题,提出了一种基于可变生成概率和多差分柯西变异的均衡优化算法(Variable generation probability and multi-difference Cauchy variation equilib-rium optimization algorithm,VDEO)。首先,结合Tent混沌映射增加初始化种群的多样性,为寻优提供基础;其次,引入可变的生成概率代替原始的固定值,使算法在迭代前期增加全局搜索能力,后期关注求解精度,以提升全局搜索和局部搜索的平衡能力;最后,融合多种差分策略和柯西变异帮助寻优过程跳出局部最优。针对包含单峰、多峰和固定维多峰在内的15个基准测试函数和CEC2022测试函数,将VDEO在多种维数下与EO,GWO,WOA,SCA,MFO,AOA,AVOA,BWO,AHA,POA这10个启发式算法进行仿真对比实验,并对基准测试函数的实验结果进行Wilcoxon秩和检验,实验结果表明,VDEO实现了更好的全局搜索和局部搜索的平衡,并具有更好的跳出局部最优的能力以及更高的收敛精度。展开更多
为解决资源管理问题,帮助建筑施工企业有效应对多重挑战,确保项目的顺利进行和企业的持续发展,本文针对工期固定,多项目并行情况,以最小方差为目标函数作为评价指标进行资源均衡优化,然后采用模糊综合评价法,建立了包括人力风险、设备...为解决资源管理问题,帮助建筑施工企业有效应对多重挑战,确保项目的顺利进行和企业的持续发展,本文针对工期固定,多项目并行情况,以最小方差为目标函数作为评价指标进行资源均衡优化,然后采用模糊综合评价法,建立了包括人力风险、设备风险、材料风险、财务风险这4个一级风险因子及12个二级风险因子的资源风险评价体系,并通过工程实例验证本文构建的模型的可行性与有效性。该研究结论对多项目管理理论与实践具有较好的理论与借鉴意义。In order to solve the problem of resource management, to help building construction enterprises effectively deal with multiple challenges, to ensure the smooth progress of the project and the sustainable development of the enterprise, in this paper, for the situation of fixed duration and multiple projects in parallel, we take the minimum variance as the objective function as the evaluation index to optimize the balance of resources, and then we adopt the fuzzy comprehensive evaluation method to establish a resource risk evaluation system including four primary risk factors and 12 secondary risk factors, including manpower risk, equipment risk, material risk, and financial risk, and we validate the feasibility and effectiveness of the model established in this paper through the engineering examples. Meanwhile, the validity of the model is established in this paper. The conclusion has good theoretical and reference significance for the theory and practice of multi project management.展开更多
文摘针对标准均衡优化算法(EO)存在全局搜索和局部搜索的平衡能力不足以及易陷入局部最优的问题,提出了一种基于可变生成概率和多差分柯西变异的均衡优化算法(Variable generation probability and multi-difference Cauchy variation equilib-rium optimization algorithm,VDEO)。首先,结合Tent混沌映射增加初始化种群的多样性,为寻优提供基础;其次,引入可变的生成概率代替原始的固定值,使算法在迭代前期增加全局搜索能力,后期关注求解精度,以提升全局搜索和局部搜索的平衡能力;最后,融合多种差分策略和柯西变异帮助寻优过程跳出局部最优。针对包含单峰、多峰和固定维多峰在内的15个基准测试函数和CEC2022测试函数,将VDEO在多种维数下与EO,GWO,WOA,SCA,MFO,AOA,AVOA,BWO,AHA,POA这10个启发式算法进行仿真对比实验,并对基准测试函数的实验结果进行Wilcoxon秩和检验,实验结果表明,VDEO实现了更好的全局搜索和局部搜索的平衡,并具有更好的跳出局部最优的能力以及更高的收敛精度。
文摘为解决资源管理问题,帮助建筑施工企业有效应对多重挑战,确保项目的顺利进行和企业的持续发展,本文针对工期固定,多项目并行情况,以最小方差为目标函数作为评价指标进行资源均衡优化,然后采用模糊综合评价法,建立了包括人力风险、设备风险、材料风险、财务风险这4个一级风险因子及12个二级风险因子的资源风险评价体系,并通过工程实例验证本文构建的模型的可行性与有效性。该研究结论对多项目管理理论与实践具有较好的理论与借鉴意义。In order to solve the problem of resource management, to help building construction enterprises effectively deal with multiple challenges, to ensure the smooth progress of the project and the sustainable development of the enterprise, in this paper, for the situation of fixed duration and multiple projects in parallel, we take the minimum variance as the objective function as the evaluation index to optimize the balance of resources, and then we adopt the fuzzy comprehensive evaluation method to establish a resource risk evaluation system including four primary risk factors and 12 secondary risk factors, including manpower risk, equipment risk, material risk, and financial risk, and we validate the feasibility and effectiveness of the model established in this paper through the engineering examples. Meanwhile, the validity of the model is established in this paper. The conclusion has good theoretical and reference significance for the theory and practice of multi project management.