共查询到19条相似文献,搜索用时 187 毫秒
1.
2.
论述了冲裁件排样材料利用率计算的数学模型和计算机的排样的方法,并给出了采用加密点逐步移动判定法对冲裁件进行单排顺排、单排对排的计算机最优排样算法.以达到节约材料,提高效益的目的.以智能优化算法为基础,给出了单排对排的优化排样算法及实现方法,实验结果证明本文提出的方法是有效的. 相似文献
3.
4.
5.
6.
7.
8.
9.
10.
蚂蚁算法是解决优化问题的一种相对轻新的启发式算法,大规模的矩形件优化排样问题是个NP难题。文中尝试用蚂蚁算法求解矩形件优化排样问题,根据提出的求解算法,开发出了基于蚂蚁算法的计算机辅助优化排样系统,并将蚂蚁算法的求解结果和遗传算法进行了对比,试验结果证明了用蚂蚁算法求解矩形件优化排样问题的可行性和有效性。 相似文献
11.
一种系统维修性优化分配的方法 总被引:3,自引:0,他引:3
针对现有维修性分配方法的不足 ,从系统的经济性分析入手 ,提出了一种以系统相关费用为最小的优化分配方法 ,证明了最优解的存在性 ,并给出了优化分配表达式。最后举例说明了该方法的应用 相似文献
12.
Passive filters are used as one of the effective solutions to mitigate harmonics and improve power quality in electrical networks. In this paper, a new fuzzy approach is proposed for the allocation of detuned passive filters based on a Nonhomogeneous Cuckoo Search Algorithm (NoCuSa). In this method, a resonance index is inserted in the problem formulation to avoid being in a resonance condition after the allocation of passive filters. In this regard, the candidate locations for the installation of passive filters are first selected based on a sensitivity analysis. Then, the values and tuning orders of the passive filters are optimized by using the proposed algorithm for single- and multi-load levels while applying fixed and switched passive filters. In the simulations, different scenarios for optimal allocation of passive filters are investigated and compared with optimal allocation of capacitors. Finally, the fuzzy problem model is implemented on an IEEE 69-bus network by NoCuSa and compared with different optimization algorithms. The results demonstrate an improvement in the final annual net benefit by applying NoCuSa in comparison with other algorithms. In addition, another comparison made between the proposed method and those implemented on IEEE 69-bus system shows the efficiency of the proposed method. 相似文献
13.
Yuanjun Laili Fei Tao Lin Zhang Bhaba R. Sarker 《The International Journal of Advanced Manufacturing Technology》2012,63(5-8):671-690
As a new advanced service-oriented networked manufacturing model, cloud manufacturing (CMfg) has been proposed recently. The optimal allocation of computing resources (OACR) is a core part for implementing CMfg. High heterogeneity, high dynamism, and virtualization make the OACR problem more complex than the traditional scheduling problems in grid system or cloud computing system. In this paper, a new comprehensive model for OACR is proposed in the CMfg system. In this model, all main computation, communication, and reliability constraints in the special circumstances are considered. To solve the OACR problem, a new improved niche immune algorithm was presented. Associated with the niche strategy, new heuristics are designed flexibly based on the characteristics of the problem and pheromone is added for adaptive searching. Experiments demonstrate the effectiveness of the designed heuristic information and show NIA’s high performances for addressing the OACR problem compared with other intelligent algorithms. 相似文献
14.
15.
K. L. Mak Y. S. Wong 《The International Journal of Advanced Manufacturing Technology》2000,16(12):917-926
This paper studies the product grouping problem and the resource allocation problem in the design of manufacturing systems
where multiple production lines are used to manufacture a range of products. Each production line in the product grouping
problem is dedicated to manufacturing a group of products. A mathematical model is developed to determine the number of product
groups and the composition of each product group in the manufacturing system. For the resource allocation problem, a mathematical
model is developed to determine the optimal resource allocation scheme for each production line and the optimal inventory
level for each product. A genetic-based algorithm is proposed to solve the product grouping problem and the resource allocation
problem simultaneously, and its results are compared to those of the conventional heuristic approaches. The proposed genetic
approach is a simple but effective means of solving these problems. 相似文献
16.
17.
Maghsoud Amiri Ali Mohtashami 《The International Journal of Advanced Manufacturing Technology》2012,62(1-4):371-383
This paper presents a multiobjective formulation of the buffer allocation problem in unreliable production lines. Majority of the solution methods for buffer allocation problems assume that the process times, time between failures, and repair times are deterministic or exponentially distributed. This paper relaxes these restrictions by proposing a simulation-based methodology which can consider general function distributions for all parameters of production lines. Factorial design has been used to build a meta-model for estimating production rate based on a detailed, discrete event simulation model. We use genetic algorithm combined to line search method to solve the multiobjective model and determining the optimal (or near optimal) size of each buffer storage. 相似文献
18.
Mostafa Ekhtiari Keivan Ghoseiri 《The International Journal of Advanced Manufacturing Technology》2013,65(1-4):183-196
Effective manpower allocation is among the most vital and complicated decisions for most companies on account of imprecise nature of input information of the problem. This paper presents a novel combination of the chance-constrained programming and the global criterion model for manpower allocation problem that is called chance-constrained global criterion. The proposed model is a deterministic equivalent for the multi-objective stochastic problem of manpower allocation. To illustrate the model, a tri-objective stochastic manpower allocation case problem for determining optimal number of manpower in a job-shop manufacturing system is formulated and solved, and then the competitive advantages of the model are discussed. To have a better judgment on the validity and performance efficiency of the model, 20 different problems are generated and solved. The results show that increasing the size of problem do not have much effect on the number of iterations required for finding the optimal solution, and this model decreases complicacy in modeling the problem. 相似文献