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模糊环境下多出救点应急救援车辆路径与物资运输优化研究 总被引:1,自引:0,他引:1
为研究灾害发生后应急救援车辆的运输路径和救援物资的运输问题,考虑受灾点对救援物资的需求量为模糊变量,将多出救点到多个受灾点的应急救援运输优化问题视为两阶段决策问题.第1阶段建立救援车辆的路径优化模型,实现运输时间最短;在满足第1阶段最优的情况下,第2阶段建立模糊线性规划模型,在运输成本最小前提下,确定出救点与受灾点之间的救援物资调运以及受灾点与受灾点之间救援物资的转运量.最后,利用具体算例来验证该模型的有效性. 相似文献
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灾害链中多资源应急调度模型与算法 总被引:3,自引:0,他引:3
灾害事故的应急资源调度是减少生命财产损失的有效手段.针对灾害链中多资源应急调度问题, 建立了多资源多受灾点应急调度模型,设计了基于图论中网络优化和线性规划优化思想的启发式算法,并分析了算法复杂性.该算法根据应急资源在原生灾害和次生灾害中的需求对资源进行分类,对灾害链中都需要的公共应急资源, 通过对模型线性松弛解的修正,降低问题的复杂性, 减少算法的计算时间;而对原生或次生灾害中需要的应急资源, 运用领域搜索方法寻找出救点,得到满意的资源调度方案. 最后通过算例验证了算法的有效性和可行性,表明算法适合较大规模的计算, 并能满足应用中的实时性要求. 相似文献
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基于联系数的多资源应急系统调度问题 总被引:18,自引:0,他引:18
针对多资源连续消耗应急系统调度问题中出救点到应急地点的时间不确定性 ,采用集对分析中的联系数概念进行描述和求解 ,并定义了联系数的序关系的概念 .给出了基于联系数的多资源连续消耗应急系统的应急时间最早的模型和算法 .数值算例表明了算法的有效性和实用性 . 相似文献
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灾害救援问题具有信息缺失、数据难以收集与整理的特点.为了科学、合理地进行救援物资的调度,考虑在满足处置应急需求时,从总体上最大限度地降低处置应急物资运输调度的费用和时间.在现有研究成果的基础上,引入了模糊评价方法,建立多出救点、多受灾地的多目标模糊规划模型.模型采用加权语言标签空间描述救援地到受灾地可能发生的费用与时间,考虑决策者对风险的偏好建立无差异函数,将其转化成决策者的效用作为目标值,给出相关算法,确定为每一个应急需求点提供应急物资的供应点以及相应的供应量.最后,给出算例证明其可行性. 相似文献
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Lü Min 《系统工程与电子技术(英文版)》2008,19(3)
To study the uncertain optimization problems on implementation schedule, time-cost trade-off and quality in enterprise resource planning (ERP) implementation, combined with program evaluation and review technique (PERT), some optimization models are proposed, which include the implementation schedule model, the timecost trade-off model, the quality model, and the implementation time-cost-quality synthetic optimization model. A PERT-embedded genetic algorithm (GA) based on stochastic simulation technique is introduced to the optimization models solution. Finally, an example is presented to show that the models and algorithm are reasonable and effective, which can offer a reliable quantitative decision method for ERP implementation. 相似文献
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A calculus for services innovation 总被引:1,自引:1,他引:0
Innovation in the services area - especially in the electronic services (e-services) domain - can be systematically developed by first considering the strategic drivers and foci, then the tactical principles and enablers, and finally the operational decision attributes, all of which constitute a process or calculus of services innovation. More specifically, there are four customer drivers (i.e., collaboration, customization, integration and adaptation), three business foci (i.e., creation-focused, solution-focused and competition-focused), six business principles (i.e., reconstruct market boundaries, focus on the big picture not numbers, reach beyond existing demand, get strategic sequence right, overcome organizational hurdles and build execution into strategy), eight technical enablers (i.e., software algorithms, automation, telecommunication, collaboration, standardization, customization, organization, and globalization), and six attributes of decision informatics (i.e., decision-driven, information-based, real-time, continuously-adaptive, customer-centric and computationally-intensive). It should be noted that the four customer drivers are all directed at empowering the individual - that is, at recognizing that the individual can, respectively, contribute in a collaborative situation, receive customized or personalized attention, access an integrated system or process, and obtain adaptive real-time or just-in-time input. The developed process or calculus serves to identify the potential white spaces or blue oceans for innovation. In addition to expanding on current innovations in services and related experiences, white spaces are identified for possible future innovations; they include those that can mitigate the unforeseen consequences or abuses of earlier innovations, safeguard our rights to privacy, protect us from the always-on, interconnected world, provide us with an authoritative search engine, and generate a GDP metric that can adequately measure the growing knowledge economy, 相似文献
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《系统工程理论与实践》2014,(4)
正August 10-14,2015Beijing,China The International Congress on Industrial and Applied Mathematics(IClAM)is the premier international congress in the field ofapplied mathematics held every four years under the auspices ofthe International Council for Industrial and Applied Mathematics.From August 10 to 14,2015,mathematicians,scientists and entrepreneurs fiom around the world will gather in Beijing,China for the 8th IClAM to be held at 相似文献
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论生物系统中的功能不守恒性 总被引:1,自引:0,他引:1
张知彬 《复杂系统与复杂性科学》2004,1(2):43-51
根据能量守恒定律,能量一次转换所做的总功应等于输入的总能量。但在生物系统中,能量的转换是多次的,其总功之和大于系统输入的总能量,此现象称之为功能不守恒性。能量转换效率越高,功能差别越大。能量通过细胞水平的多次转换,总功可提高至2倍左右。能量通过生态系统水平多次转换,总功可提高至1.4倍左右。通过系统内各子系统能流之和称为序能,反映了系统有序性大小,它取决于系统输入总能量和能量转换效率。根据序能原理,用GDP^2/9(GDP为国内生产总值,Q为能量总输入)反映人类社会功能和效率,要比单纯用GDP更客观。绿色GDP应同时考虑使GDP^2/Q增长最大和使自然生态系统的序能最大。人的经济行为和动物的行为对策也符合序能原理。 相似文献
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This paper is about the Wuli, Shili, Renli (WSR) systems methodology. An important concept within this, Renli, has been developed from Confucian philosophy to clarify to Chinese researchers the necessity of dealing with human relations in systems practice. At present, the only formal means of operationalizing Renli that people are exploring in China is to import from the West methods for organizing debate. However, the concept of Renli suggests that more is needed than methods alone. In particular, facilitation skills are required. It is argued that the development of facilitation skills can be enhanced if researchers can gain both theoretical and practical knowledge of group dynamics, and engage in activities of self-reflection to look at, and alter, their own roles in these dynamics and the wider sociopolitical system. There are therefore three aspects to Renli: the use of systems methods for organizing debate, the acquisition of facilitation skills, and self-reflection geared toward the development of facilitation skills and enhanced critical awareness of the politics of intervention. 相似文献
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李弋 《系统工程理论与实践》2011,(Z2):70-74
随着云计算的发展,新的应用不断涌现,但电子邮件服务依然占有着重要的地位.邮件服务器是一种I/O密集的应用.在云计算时代,越来越多的用户邮件保存在服务器端,邮件在从客户端传输到服务器端之前,邮件或者邮件的部分内容在服务器端可能已经存在.基于这种现象,提出了一种方案,通过引入计算的代价来降低通信量,从而提高邮件服务器的处理能力.对电子邮件的格式和SMTP协议进行了扩充,引入了附件和正文分离传输的模式.在邮件传输时,客户端先计算附件的散列值,并作为正文的一部分传输到服务器端,服务器端再根据散列值来判断附件是否需要传输. 相似文献
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金工工艺的优化设计 总被引:2,自引:0,他引:2
邹庆化 《系统工程理论与实践》1996,10(11):106-112
运用价值工程与运筹工程理论, 在金工工艺单项设计指标优化的基础上, 对其设计指标也进行了全面优化。 相似文献
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《系统工程理论与实践》2014,(5)
正August 10-14,2015Beijing,ChinaThe International Congress on Industrial and Applied Mathematics(ICIAM)is the premier international congress in the field of applied mathematics held every four years under the auspices of the International Council for Industrial and Applied Mathematics.From August 10 to 14,2015,mathematicians,scientists 相似文献