软计算求解分布式多工厂多顾客的供应链准时化生产计划问题

描述了分布式多工厂、多顾客的供应链准时化生产计划问题,以实现最小化提前／拖期惩罚费用、生产成本、产品运输费用之和为目标建立了数学模型,将遗传算法与模糊逻辑相结合,设计了软计算方法求解模型,采用基于规则方法的模糊规则量化方法求解模糊决策,并将模糊决策嵌入遗传算法,使得算法具有比分枝定界法更快的寻优能力和更广的适应范围。实例计算结果表明了该模型和算法的有效性和应用潜力。     

软件算求解分布式多工厂单件制造业的提前／拖期生产计划问题

描述了分布式多工厂单件制造企业准时化生产计划问题，以实现最小化提前／拖期惩罚费用，生产成本，产品运输费用之和为目标建立0－1规划数学模型，设计了基于模糊规则量化的方法求解模糊决策，并将模糊决策嵌入到遗传算法中的软计算方法求解模型，使得算法具有比分枝定界快速的寻找优解的能力以及更广泛的适应范围，结果表明了该模型和算法的有效性和应用潜力。     

Joint replenishment model under fuzzy costs and resource constraints——differential evolution algorithm approach

针对复杂不确定环境下的联合采购决策难题,用三角模糊数表示不确定的次要订货费用、库存持有费用和资金约束条件,用梯形模糊数表示不确定的存储空间约束,构建了模糊联合采购模型,并采用两种方法对模糊总成本进行去模糊化处理.进而在对差分进化(DE)算法改进并借助典型函数测试性能的基础上,给出了基于改进DE的模糊联合采购模型求解流程,算例证明所设计的DE算法能较好地解决模糊联合采购问题.     

费用与资源约束双重模糊下的联合采购模型——基于差分进化算法的研究*

针对复杂不确定环境下的联合采购决策难题,用三角模糊数表示不确定的次要订货费用、库存持有费用和资金约束条件,用梯形模糊数表示不确定的存储空间约束,构建了模糊联合采购模型,并采用两种方法对模糊总成本进行去模糊化处理。进而在对差分进化(DE)算法改进并借助典型函数测试性能的基础上,给出了基于改进DE的模糊联合采购模型求解流程,算例证明所设计的DE算法能较好地解决模糊联合采购问题。     

机会约束下贷款组合优化决策的方差最小化模型

通过把贷款的收益率刻画为模糊变量,提出了机会约束下贷款组合优化决策的方差最小化模型。针对贷款收益率是特殊的三角模糊变量的情况,给出模型的清晰等价类,对等价类模型用传统的方法进行求解。对于贷款收益率的隶属函数比较复杂的情况,应用集成模糊模拟、神经网络、遗传算法和同步扰动随机逼近算法的混合优化算法求解模型。数值算例验证了模型和算法的有效性。     

商业银行贷款组合优化决策的机会准则模型

通过把贷款的收益率刻画为模糊变量,提出了商业银行贷款组合优化决策的机会准则模型,即可能性准则模型、必要性准则模型和可信性准则模型。对于贷款收益率是特殊的三角模糊变量的情况,给出了模型的清晰等价类,这些等价类可以用传统的方法进行求解。对于贷款收益率的隶属函数比较复杂的情况,应用集成模糊模拟、神经网络、遗传算法和同步扰动随机逼近算法的混合优化算法求解模型。数值算例验证了模型和算法的有效性。     

基于混合果蝇优化算法的选址-库存联合优化策略

针对装备维修保障仓库系统运营费用高、仓库点位布局不合理、备件库存结构不合理等问题,建立以多品种联合补货问题为基础的装备维修备件仓库选址-库存控制决策联合优化模型,模型可用于求解仓库的开设位置、维修活动需求点的指派情况、仓库补货时间以及库存水平等.根据模型的结构特点,利用多种群协同进化的方法改进传统果蝇优化算法的位置更新方式,设计一种内外两层搜索策略的混合果蝇优化算法,外层搜索策略作为算法的主程序用于搜索仓库选址决策变量,内层搜索策略采用改进的RAND算法用于搜索库存控制决策变量.仿真结果表明,混合果蝇优化算法具有良好的求解效率,能够确保库存系统在一定服务水平的基础上有效降低库存运营总成本.     

考虑投资者心理特征的模糊投资组合优化模型

投资者在实际金融市场中的决策行为往往会受到主观心理认知的影响.考虑参照依赖、敏感性递减和损失厌恶等影响投资决策的心理特征,研究模糊环境下的投资组合选择问题.首先,假设资产的收益为梯形模糊数,依据前景理论中的价值函数,将组合收益转化为体现投资者心理特征的感知价值;然后,以感知价值的可能性均值最大化和可能性下半方差最小化为目标,建立考虑心理特征的模糊投资组合优化模型;接着,为了有效地求解模型,设计一个多种群遗传算法;最后,通过实例分析表明模型和算法的有效性.结果表明,与传统的遗传算法相比,所设计的多种群遗传算法可更有效地求解模型,考虑心理特征的模糊投资组合优化模型能够提升投资者的满意程度,可为实际的投资活动提供决策支持.     

一类最小代价模糊决策系统及其算法

针对模糊决策系统在应用中的实际问题,提出一类最小代价模糊决策系统模型,定义了最优决策约简和最优决策代价,并对其性质进行分析。求解最优决策约简和最优决策代价是NP完全问题,为此给出基本算法、贪婪算法和基于拉格朗日松弛的子梯度优化算法,并进行实验分析。     

基于模糊优化的物流配送路径(MLRP)问题研究

研究采用嵌入模糊决策规则的遗传算法（即模糊优化方法）求解物流配送多目标定位-运输路线安排问题（MLRP）,重点考虑了时间和运输成本两个目标的MLRP的求解方法.该算法分成3个阶段,首先利用遗传算法对初始种群搜索选择优化配送路径;然后应用配送网络调度算法综合评价来确定配送路径中的关键路径和非关键路径;最后根据模糊决策规则计算其各个调度相应的指标,并对已挑选出来的染色体中的某些位基因进行调整,以提高算法的收敛性.计算机仿真结果证明了将此混合算法用于求解中、小规模物流配送问题的有效性.     

A hybrid fuzzy goal programming approach with different goal priorities to aggregate production planning

In this study a hybrid (including qualitative and quantitative objectives) fuzzy multi objective nonlinear programming (H-FMONLP) model with different goal priorities will be developed for aggregate production planning (APP) problem in a fuzzy environment. Using an interactive decision making process the proposed model tries to minimize total production costs, carrying and back ordering costs and costs of changes in workforce level (quantitative objectives) and maximize total customer satisfaction (qualitative objective) with regarding the inventory level, demand, labor level, machines capacity and warehouse space. A real-world industrial case study demonstrates applicability of proposed model to practical APP decision problems. GENOCOP III (Genetic Algorithm for Numerical Optimization of Constrained Problems) has been used to solve final crisp nonlinear programming problem.     

可延迟供货的冷轧生产库存问题之建模与优化

本文针对可延迟供货的冷轧生产系统,建立了以最小化库存成本、拖期惩罚和启动成本为目标的多阶段生产库存模型,模型中充分考虑了工序不允许停机的情况以及计划与调度之间的一致性问题.同时开发了基于变量分离的有效拉格朗日松弛求解算法,并使用120个基于实际生产数据的算例进行了仿真实验,计算结果显示该算法能够在合理的时间内得到高质量的解.     

分布式多工厂、多分销商的供应链生产计划模型

描述了分布式多工厂、多分销商的供应链生产 计划,以实现最小化提前/拖期惩罚费用、生产成本、产品运输费用的总额为目标建立了模型 ,通过模型转换,求解得到了其生产计划调度方案.计算结果证明了模型的有效性和可行性.     

单件制造业准时生产计划的计算机优化系统

本文提出了单件制造业准时生产计划分层优化方法，建立了提前／拖期罚款下的准时生产计划优化模型，设计了生产计划的计算机优化系统。仿真及应用证明系统设计合理，分层计划方法有效，计算量小。     

一种基于动态决策块的超启发式跨单元调度方法

对运输能力受限条件下的跨单元调度问题进行分析, 提出一种基于动态决策块和蚁群优化 (Ant colony optimization, ACO) 的超启发式方法, 同时解决跨单元生产调度和运输调度问题. 在传统超启发式方法的基础上, 采用动态决策块策略, 通过蚁群算法合理划分决策块, 并为决策块选择合适的规则. 实验表明, 采用动态决策块策略的超启发式方法比传统的超启发式方法具有更好的性能, 本文所提的方法在最小化加权延迟总和目标方面有较好的优化能力 并且具有较高的计算效率.     

A possibilistic environment based particle swarm optimization for aggregate production planning

Development of an Aggregate Production Plan (APP), the top most level in a hierarchical production planning system, is a difficult task, especially when input and other production planning parameters are uncertain because of their inherent impreciseness. This therefore makes generation of a master production schedule highly complex. Regarding this point, in this paper, we present a scheme of a multi-period and multi-product APP which is formulated as an integer linear programming model. The proposed approach uses a triangular possibility distribution for handling all the imprecise operating costs, demands, and also for the capacity data. The proposed approach uses the strategy of simultaneously minimizing the most possible value of the imprecise total costs, maximizing the possibility of obtaining lower total costs and minimizing the risk of obtaining higher total costs. A modified variant of a possibilistic environment based particle swarm optimization (PE-PSO) approach is used to solve the APP model. A numerical model for demonstrating the feasibility of the proposed model is also carried out. In the computational study, the considered case study data were experimented with and analyzed to evaluate the performance of the PE-PSO over both a standard genetic algorithm (GA) and a fuzzy based genetic algorithm (FBGA). The experimental results demonstrate that the PE-PSO variant provides better qualities in the aspects of its accuracy when compared to the other two algorithms.     

Minimum risk criterion for uncertain production planning problems

This paper considers a new class of multi-product source and multi-period fuzzy random production planning problems with minimum risk and service levels where both the demands and the production costs are assumed to be uncertain and characterized as fuzzy random variables with known distributions. The proposed problems are formulated as a fuzzy random production planning (FRPP) model by maximizing the mean chance of the total costs less than a given allowable investment level. Because the exact value of the objective function for a given decision variable cannot be easily obtained, we adopt an approximation approach (AA) to evaluate the objective value and then discuss the convergence of the AA, including the convergence of the objective value, the convergence of the optimal solutions and the convergence of the optimal value. Since the approximating multi-product source multi-period FRPP model is neither linear nor convex, an approximation-based hybrid monkey algorithm (MA) which combines the AA, stochastic simulation (SS), neural network (NN) and MA is designed to solve the proposed model. Finally, numerical examples are provided to illustrate the effectiveness of the hybrid monkey algorithm.     

Hybrid MTS/MTO order partitioning framework based upon fuzzy analytic network process

This paper addresses the strategic level of Hybrid Make-To-Stock (MTS)/Make-To-Order (MTO) production contexts using Fuzzy Analytic Network Process (FANP). The decisions which are involved in this level are family formation and order partitioning. First, a family formation procedure is developed; then, a fuzzy analytic network process is proposed to tackle partitioning decision. Since strategic decisions usually deal with the uncertainty and ambiguity of data as well as experts’ and managers’ linguistic opinions, the proposed model is equipped with fuzzy sets theory. An important attribute of the model is its generality due to diverse decision factors which are both elicited from the literature and developed by the authors themselves. Finally, the model is validated by applying it to a real industrial case study.     

Application of fuzzy multi-objective linear programming to aggregate production planning

This study develops a fuzzy multi-objective linear programming (FMOLP) model for solving the multi-product aggregate production planning (APP) decision problem in a fuzzy environment. The proposed model attempts to minimize total production costs, carrying and backordering costs and rates of changes in labor levels considering inventory level, labor levels, capacity, warehouse space and the time value of money. A numerical example demonstrates the feasibility of applying the proposed model to APP problem. Its advantages are also discussed. The proposed model yields a compromise solution and the decision maker's overall levels of satisfaction. In particular, in contrast to other APP models, several significant characteristics of the proposed model are presented.