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潮流计算是电力系统研究的一项重要分析功能,同时也是变电站的仿真系统中的一项重要仿真计算。文章结合变电站的仿真培训系统,阐述潮流计算的数学模型及Newton-Laphson计算方法并详细地介绍智能决策接口的实现。 相似文献
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为有效提高供应链效率,运用数据包络分析(Data Envelopment Analysis,DEA)方法,构建供应链系统数据包络(Data Envelopment Analysis-Supply Chain All,DEA-SCA)评价模型;使用DEAP2.1仿真软件平台对卷烟14条供应链系统进行数据计算仿真,量化供应链系统整体效率。仿真结果表明:较传统的DEA-CCR效率分析,DEA-SCA效率评价模型能够有效甄别供应链上下游组织中存在的问题;提高供应链系统的整体效率。 相似文献
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文章介绍控制系统的稳态误差及系统的分类,通过实验室电路模拟和MATLAB仿真两种方法,对线性O型和Ⅰ型系统在阶跃响应下的稳态误差进行对比分析,验证了系统理论计算的准确性,分析并得出两者问存在误差的主要原因. 相似文献
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新型电动代步车差速转向控制系统的原理分析和计算仿真,包括新型电动代步车差速转向系统的运动模型的建立和分析、MATLAB计算环境下的PID控制仿真。 相似文献
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《Enterprise Information Systems》2013,7(4):523-542
Process dynamic modelling for service business is the key technique for Service-Oriented information systems and service business management, and the workflow model of business processes is the core part of service systems. Service business workflow simulation is the prevalent approach to be used for analysis of service business process dynamically. Generic method for service business workflow simulation is based on the discrete event queuing theory, which is lack of flexibility and scalability. In this paper, we propose a service workflow-oriented framework for the process simulation of service businesses using multi-agent cooperation to address the above issues. Social rationality of agent is introduced into the proposed framework. Adopting rationality as one social factor for decision-making strategies, a flexible scheduling for activity instances has been implemented. A system prototype has been developed to validate the proposed simulation framework through a business case study. 相似文献
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为尽可能提高泊位系统的服务质量,以满足港口吞吐量增长的需求和减少船方在港停留时间,阐述港口泊位系统的特点及其影响因素,借助系统模拟、排队论方法构造泊位服务系统模拟模型和分析泊位服务水平,对比泊位服务系统在新的泊位配置下的服务质量,以指导港口的实际生产。 相似文献
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随着移动通信技术的不断发展,国家3G网络建设的竣工,在原有基础业务支撑的基础上,更多丰富的数据增值业务被电信运营商推出。在提高产业效益的同时,相关的网络、业务维护优化,特别是数据业务的维护日益加重。而传统的数据业务拨测方法在实时性、准确性、稳定性等方面无法满足电信运维人员的工作需求,所以一种新的移动全业务仿真拨测系统被推出,受到广大运维人员的欢迎。 相似文献
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通过对西安市某信号控制交叉口进行大量实际观测,分析了该交叉口存在的问题并提出解决方案,运用Synchro仿真系统中信号配时优化模型、用于延误计算的百分比延误模型和服务水平模型,对解决方案进行了优化仿真分析,交叉口各项评价指标均得到明显改善,验证了改善方案的可行性。 相似文献
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《管理科学学报(英文)》2019,4(4):252-265
To ensure a timely response to emergencies, governments are obliged to implement effective ambulance allocation plans. In practice, an emergency medical service (EMS) system works in an uncertain environment, with stochastic demand, response-times, and travel-times. This uncertainty significantly affects ambulance allocation planning. However, few studies in this field adequately consider the effect of spatiotemporal uncertainty in demand, because it is difficult to measure it quantitatively. As a result, few analytic models capture the dynamic nature of an EMS system and, thus, the allocation plans they generate are not efficient in practice. Therefore, this study proposes a simulation-based optimization method for ambulance allocation. A simulation model is constructed to mimic the operational processes of an EMS system, and to evaluate the performance of an ambulance allocation plan in an uncertain environment. Gaussian mixture model clustering is used to derive the uncertain spatial demand. Then, the simulation generates emergency demand based on the obtained spatial distribution. A Gaussian-process-based search algorithm is used together with the simulation model to identify optimal solutions. To validate the proposed method, a case study is conducted using data on emergency patients in the Shanghai Songjiang District. Compared with the current plan adopted in Songjiang, the experimental results demonstrate that the delay time and frequency of the EMS system can be reduced significantly by employing the proposed methods. Furthermore, nearly 41% of the allocation cost can be saved. 相似文献
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介绍了物流仿真技术的发展概况,简要阐述了Automod、Witness和Flexim等一些物流仿真软件的基本特点。重点阐述了物流仿真技术在物流服务和物流系统规划两个方面的应用,最后指出了物流仿真技术的发展前景、趋势和我国物流业仿真技术应用存在的问题。 相似文献