共查询到19条相似文献,搜索用时 187 毫秒
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针对某型飞机武器发控通道故障定位周期长和排除效率低的问题,设计了基于CBR和RBR混合推理的故障诊断专家系统.介绍了产生式和基于案例的知识表示方法,详述了系统所采用的基于规则和基于案例的诊断推理机制,建立了系统的层次诊断结构模型.最后基于CLIPS和Delphi7.0混合编程的方法进行了系统实现,详细介绍了两种语言的嵌入设计. 相似文献
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对减摇鳍故障进行分析,将基于案例推理技术应用到减摇鳍故障诊断系统中,根据减摇鳍故障本身的特点设计诊断系统结构,建立案例库及检索方法,由实际事例验证了案例推理技术在减摇鳍故障诊断的应用价值,为现场人员的减摇鳍故障快速诊断提供了一条新的途径. 相似文献
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首先介绍了基于案例推理的故障诊断专家系统的特点.以智能故障诊断的理论和方法为基础,综合使用基于案例推理技术和专家系统理论,对弹炮结合防空武器的故障诊断问题进行研究,构建了基于案例推理的弹炮结合防空武器故障诊断专家系统. 相似文献
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舰船机电设备故障检测数据管理系统的设计 总被引:1,自引:1,他引:0
针对装备保障实践产生的数据与信息,采用计算机模拟与检测诊断相结合的方法,设计舰船机电设备故障检测数据管理系统的五个模块,检测系统对被检设备进行实时检测,通过逻辑分析、专家推理,准确实现对故障的定位。 相似文献
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基于信号变换的诊断方法、基于专家经验法诊断方法故障空间的局限性,导致故障定位精准度较低。为此,提出基于OPC(OLE for Process Control)技术的电力推进船舶混合动力故障定位研究。构建故障定位模型,剔除工作状态外部干扰信息。描述电力推进船舶混合动力系统故障定位特征向量,确定故障空间。计算故障出现概率,提取主要故障特征。借助人机接口对输入信号进行滤波处理,使用OPC技术匹配知识库中故障规则,找到具体故障位置。搭建电力推进船舶混合动力监控系统,利用Matlab进行实验仿真研究。实验结果表明,该方法与实际定子磁链轨迹坐标一致,具有精准定位效果。 相似文献
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介绍了基于案例的推理(CBR)技术,针对船舶维修的特点.阐述了利用基于案例的推理技术建立船舶维修专家系统,并描述了该系统的总体结构、工作原理及案例库和推理机的结构组成. 相似文献
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此文主要讨论了基于案例推理技术在船舶避碰决策系统中的应用问题,对避碰案例的表示、案例的检索和案例的修正等关键技术问题作了研究,并提出基于案例推理的船舶避碰决策系统开发的思路和方法. 相似文献
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针对目前自升式钻井平台方案设计特点,引入知识工程的理念,建立面向对象的知识表达方法及基于实例和规则的混合推理机制,采用参数化设计方法进行特征驱动,在快速生成设计方案的同时对设计进行检验并提出建议,使设计人员的工作重点从数据处理转移到对设计对象的分析上来.开发了原型系统,证明了该方法的有效性和实用性. 相似文献
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分析了BP神经网络和基于案例推理(CBR)在故障诊断领域应用中的优点、局限性和互补性,设计了二者相结合的装备故障诊断模型,通过某型装备的故障诊断实例,验证了该算法的有效性。 相似文献
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A method is presented for selecting a preferred ship from a group of candidates as a reference ship for a new design. The
method is based on a recently developed approach for multiple-criteria decision analysis under uncertainty, the evidential
reasoning approach. Using this method, both quantitative and qualitative attributes of a complicated nature can be considered
in the selection process. The method consists of three phases: identifying suitable candidate ships, evaluating them in terms
of both conventional techno-economical and qualitative attributes, and aggregating all the attributes using the evidential
reasoning approach. This three-phase procedure is illustrated by means of an oil tanker selection example. The results of
this study show that the evidential reasoning approach can support multiple-criteria ship selection processes when both qualitative
and quantitative information with or without uncertainties have to be taken into account. The outcomes generated by the method
include the ranking of the candidate ships and indications of their strengths and weaknesses in the format of performance
distributions over different assessment grades. Such information is vital in helping decision makers to make an informed selection
and be aware of any risk implication associated with the selection. 相似文献
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将Petri网理论用于船舶电力系统故障诊断中,提出了一种改进的Petri网故障诊断模型。在基本Petri网诊断模型的基础上引入模糊推理规则形成模糊Petri网,说明了该方法的模型构建、推理过程及解析方法的表示。利用该方法对船舶电力系统进行故障诊断使推理过程简洁、诊断快速、诊断结果也更科学有效。 相似文献
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Port choice is an important issue to be investigated to ensure the effective integration of container supply chains and the sustainable development of regional economy. The selection of appropriate ports to facilitate shipping activities and international trade is crucial for many stakeholders, including shipping lines, port administrators, cargo shippers and national governments. The task is essentially a process of multiple criterion decision-making (MCDM) under uncertainty, requiring analysts to derive rational decisions from uncertain and incomplete data related to different quantitative and qualitative determinants. This paper aims at proposing a new conceptual port choice method by explaining the role fuzzy logic in evidential reasoning in a complementary way, in which various forms of raw data (either objective or subjective) collected to evaluate port performance can first be converted into and presented as fuzzy grades defined using linguistics terms with degrees of belief (DoBs) and second be combined using evidential reasoning to produce a port choice preference score. The method is applied to analyse the selection of major Northeast Asian (NEA) container ports from a shipping line’s perspective. The outcome, a port choice preference score, is calculated using evidential reasoning to directly synthesize the true estimation of the port with respect to each criterion and therefore, unlike a relative ranking index, keeps the ‘goodness’ of port evaluation, capable of benchmarking a specific port’s performance and monitoring the increase of its competitiveness in a longitude study with respect to an individual criterion or all the criteria as a whole. 相似文献