共查询到20条相似文献,搜索用时 718 毫秒
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本文利用可修复系统的可用度分析方法对该物流系统的收货入库环节进行可靠性分析,提出了一种基于Markov过程的离散系统可靠性模型,对Markov状态转移方程进行求解,从而得出了求解该系统稳态有效度和故障率的计算公式。通过计算对该系统的可靠性进行了评价。 相似文献
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俞南泓 《上海立信会计学院学报》2001,15(3):50-52
游泳训练系统是一个灰色系统。根据对运动员游泳分解动作和配合动作速度的关联度分析 ,提出了制定游泳技术标准与建立综合技术模型的一种游泳技术定量分析方法。实验证明了这种分析方法的有效性 ,同时介绍了这种方法的运用过程 相似文献
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汽车刹车系统的性能直接影响到驾驶员及乘客的安全。文章以某型汽车为研究背景,依据该型汽车在刹车过程中的动力学特性,建立了该型汽车在刹车过程中的系统模型,然后利用Matlab/Simulink对该系统建立后台仿真模型,并通过CVI实现上层仿真控制台。最后,通过仿真实验对该系统模型的准确性进行了验证。系统仿真结果表明所建立的汽车刹车系统模型具有较高的准确性,同时也说明了文中所采用的方法的可行性。 相似文献
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在参考国内外大量文献的基础上,文章建立了ABS制动防抱死系统的单轮模型,对现代ABS防抱死制动系统的不起作用过程和起作用过程进行了仿真分析,并运用MATLAB语言编制了汽车制动过程的仿真软件,结合具体数据对汽车制动过程进行了仿真。仿真结果表明,文章建立的汽车制动系模型是可靠的、准确的,可为汽车制动系的设计提供理论参考。 相似文献
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本文提出工业工程是一种可以较好地解决当前企业ERP系统存在的问题并能提高企业ERP系统运作效率的方案。首先阐述了工业工程的基本原理,并介绍了企业ERP系统分析方法的发展情况,给出了基于工业过程与流程优化的分析方法。最后探讨了基于工业工程的企业ERP系统分析方法研究:基于业务流程规则的工作流模型分析,基于过程优化的企业流程分析方法和基于集成流程规则、过程优化和工业原理的工业工程模型系统分析方法。 相似文献
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在参考国内外大量文献的基础上,文章建立了ABS制动防抱死系统的单轮模型,对现代ABS防抱死制动系统的不起作用过程和起作用过程进行了仿真分析,并运用MATLAB语言编制了汽车制动过程的仿真软件,结合具体数据对汽车制动过程进行了仿真。仿真结果表明,文章建立的汽车制动系模型是可靠的、准确的,可为汽车制动系的设计提供理论参考。 相似文献
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《Socio》2016
Nighttime lighting is an important public service that impacts human activities and promotes transportation and pedestrian safety. Of course, such services are not free and have been found to have negative impacts on the environment. Responsible stewardship of the built environment requires that efficiency and care in the delivery of services be taken, particularly in the context of sustainability concerns. A significant problem with existing urban infrastructure systems like street lighting is that they have evolved over time using rule-of-thumb planning standards. Given this, systematic assessment and re-evaluation offers much potential for enhancing the spatial efficiency of infrastructure but also the opportunity to explicitly account for environmental impacts in combination with safety and security. This paper applies a methodology for studying lighting in urban areas based upon the use of spatial analytics, including GIS and spatial optimization. Findings and results are reported for a study area in San Diego, California, highlighting current system configuration issues, method development and the potential long term benefits of systematic analysis of public sector services. 相似文献
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Eudokia Balamou Demetrios Psaltopoulos 《Review of urban and regional development studies : RURDS : journal of the Applied Regional Conference》2006,18(1):60-83
A three-area interregional Social Accounting Matrix (SAM) model is used to analyze economic interdependencies and relevant diffusion patterns within and between rural-urban localities in Southern Greece: the rural areas of Archanes and N. Kazantzakis and the urban area of Heraklion. Both rural areas trickle significant economic benefits to the urban area, while the urban area has marginal linkages with them. Policy simulation analysis results have indicated that farm income support measures are important to Archanes, since reduced spending in farm income support creates significant negative impacts on firm and household income, and is not compensated by an equivalent increase in rural development policy spending. These findings do not hold for the diffusion of economic impacts towards N. Kazantzakis and Heraklion; results of this simulation show that positive economic benefits are still diffused to both the wealthier urban area and the adjacent poorer rural area of N. Kazantzakis. 相似文献
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本研究中在对高新技术产业的基本含义、特点、范围以及在新经济条件下的地位和作用分析的基础上,从系统理论生态学的观点对某地区高新技术产业发展的环境进行了定位研究。主要分为内生变量环境与外生变量环境,并采用层次分法与模糊综合评判法,给出了高新技术产业发展环境系统运行能力的评价模型。 相似文献
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城市空间仿真系统(UrbanSim)为构建城市土地利用和交通空间一体化模型提供了基础平台。以写字楼市场为研究对象,基于企业选址和写字楼开发选址的相关理论构建了写字楼市场供给(开发选址)与需求(企业选址)一体化模型,通过地理信息系统(GIS)建立了北京市写字楼开发/价格、企业选址及城市基础设施和公共服务的空间数据库,并在UrbanSim平台上利用这些空间微观数据对写字楼市场一体化模型进行了标定。利用已标定的一体化模型,论文进行了城市政策效果和城市发展的情景模拟,包括轨道交通建设对企业选址和开发选址的影响,以及北京市两个重要的商务办公区(商务中心区和金融街)功能区扩张的预期效果。 相似文献
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《Enterprise Information Systems》2013,7(4):365-381
Enterprise process modelling as a core area of the Enterprises Information Systems (EIS) research has long attracted theoreticians of new concepts, designers of artefacts, and practitioners of modelling. As a result a vast number of modelling methods have been generated. However, each method is challenging because they lack certain aspects. First, these methods view processes as a flowchart, undermining the deep (nested) structure of processes. Second, most of these methods are based on informal or semi-formal representation, failing direct model checking and formal analysis without further translations and mapping procedures. Finally, because the majority of these methods originated from a computing perspective, their focal point is control-flow rather than interaction of social actors. In reality, an enterprise is a complex socio-technical system that includes interaction of technical and social components. In this paper, we discuss an innovative method that will address some of these challenges and provide an improved tool for this purpose. We base our method on the field-proven DEMO theory and methodology, where emphasis is made on the interactions between social actors. The proposed method encompasses a set of graphical notations and constructs based on the Petri nets semantics that allows direct model analysis and simulation. 相似文献
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提出了基于INTEGRATION的城市交通中观仿真建模方法。选取中观仿真模型INTEGRATION为研究对象,提出了INTEGRATION应用于城市交通管理的技术路线;并利用INTEGRATION搭建了奥林匹克公园周边路网交通仿真平台,分析了奥运会高峰日期间实施交通需求控制和铺设专用道策略之后,专用道的运行效率和对周边路网的影响,验证了INTEGRATION在开展城市交通管理方面的应用效果。 相似文献