共查询到16条相似文献,搜索用时 515 毫秒
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本文提出多目标递推矩阵新概念,建立水资源系统多目标模糊优选动态规划理论,模型与技术。提出用模糊集方法建立目标权重。最后给出一个算例。 相似文献
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应用系统动力学-多目标规划整合模型对秦皇岛市城市水资源利用结构进行了优化研究,首先预测秦皇岛市在以1999年为基准年,不进行结构调整状态下的总体发展趋势,从中获取有关水资源的供需信息,然后进行水资源利用结构分析,找出存在的问题,据此进行城市总体结构和水资源利用结构的优化研究,获得了秦皇岛市区水资源利用规划方案;将所得规划结果输入系统动力学模型,对规划方案实施后的社会、经济和环境后果进行了合理预测. 相似文献
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对水资源随时间变化的效益系数运用模糊动态AHP法计算,在此基础上对区域水资源优化调配方案利用区间数线性规划法确定,然后以朝阳市为例验证了模型的可靠性与仿真性能。结果显示:在水资源优化配置中基于模糊动态AHP法的计算模型具有较高的模拟精度与适应性,该模型取得了理想的计算效果;可为促进区域水资源可持续利用与优化配置提供新的方法和思路。 相似文献
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建立了梯级水库在洪水期间发电调度的优化模型,由于含有河道洪水演进方程,该模型成为一类有后效性的动态规划模型.提出了两种新的解法——多维动态规划近似解法与有后效性动态规划逐次逼近算法.实例研究表明:这两种解法可行,结果合理,特别是逐次逼近算法计算更快速,是求解这类问题的有效的方法. 相似文献
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利用大系统和模糊数学规划理论与方法,分析和探讨了水电站水库群模糊优化调度问题,建立了水电站水库群模糊优化调度模型,提出一种目标协调-模糊规划(IB-FP)法.理论分析和实例计算表明,所建立的模糊优化调度模型和提出的IB-FP法是可行和有效的. 相似文献
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Mohammad Reza Nikoo Reza Kerachian Akbar Karimi Ali Asghar Azadnia Keighobad Jafarzadegan 《Environmental Earth Sciences》2014,71(9):4127-4142
In this paper, a new methodology is developed for optimization of water and waste load allocation in reservoir–river systems considering the existing uncertainties in reservoir inflow, waste loads and water demands. A stochastic dynamic programming (SDP) model is used to optimize reservoir operation considering the inflow uncertainty, and another model called PSO-SA is developed and linked with the SDP model for optimizing water and waste load allocation in downstream river. In the PSO-SA model, a particle swarm optimization technique with a dynamic penalty function for handling the constraints is used to optimize water and waste load allocation policies. Also, a simulated annealing technique is utilized for determining the upper and lower bounds of constraints and objective function considering the existing uncertainties. As the proposed water and waste load allocation model has a considerable run-time, some powerful soft computing techniques, namely, Regression tree Induction (named M5P), fuzzy K-nearest neighbor, Bayesian network, support vector regression and an adaptive neuro-fuzzy inference system, are trained and validated using the results of the proposed methodology to develop real-time water and waste load allocation rules. To examine the efficiency and applicability of the methodology, it is applied to the Dez reservoir–river system in the south-western part of Iran. 相似文献
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A dynamic programming model for optimal planning of aquifer storage and recovery facility operations 总被引:3,自引:0,他引:3
V. Uddameri 《Environmental Geology》2007,51(6):953-962
Aquifer storage recovery (ASR) is an innovative technology with the potential to augment dwindling water resources in regions
experiencing rapid growth and development. Planning and design of ASR systems requires quantifying how much water should be
stored and appropriate times for storage and withdrawals within a planning period. A monthly scale planning model has been
developed in this study to derive optimal (least cost) long-term policies for operating ASR systems and is solved using a
recursive deterministic dynamic programming approach. The outputs of the model include annual costs of operation, the amount
of water to be imported each month as well as the schedule for storage and extraction. A case study modeled after a proposed
ASR system for Mustang Island and Padre Island service areas of the city of Corpus Christi is used to illustrate the utility
of the developed model. The results indicate that for the assumed baseline demands, the ASR system is to be kept operational
for a period of 4 months starting from May through August. Model sensitivity analysis indicated that increased seasonal shortages
can be met using ASR with little additional costs. For the assumed cost structure, a 16% shortage increased the costs by 1.6%.
However, the operation time of ASR increased from 4 to 8 months. The developed dynamic programming model is a useful tool
to assess the feasibility of evaluating the use of ASR systems during regional-scale water resources planning endeavors. 相似文献
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在水资源可持续利用思想指导下,建立了水库可持续长期优化调度模型.该模型以包含经济、社会、环境效益的综合效益最大化作为目标函数,在满足各种约束条件下协调当代与后代的用水需求.文中同时提出了分层模糊多目标动态规划法作为模型求解的一条途径.实例计算表明,该模型在一定程度上能够为水库可持续利用提供令人满意的决策方案. 相似文献
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应用现有典型算法求解灌溉制度优化设计模型时,由于各种算法本身存在着不足,可被接受的模型最优解往往不能够被成功搜索到。自由搜索(Free Search,FS)是一种新的优化算法,对其进行了适当改进,针对灌溉制度优化设计模型实例,在不同的可供水量下,应用FS算法对该模型进行求解。结果表明,FS算法表现出良好的稳健性和收敛性;与以往的动态规划逐次逼近法(DPSA)、遗传算法(GA)及混沌算法(CA)对该实例的寻优结果相比,FS算法提高了寻优精度。FS算法原理简单,操作简便,是一种较好的优化灌溉制度的新方法。 相似文献
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