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2016 Annual Conference of the North American Fuzzy Information Processing Society (NAFIPS)最新文献

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Similarity-based method for reduction of fuzzy rules 基于相似度的模糊规则约简方法
Arturo Garcia-Garcia, M. Reformat, Andres Mendez-Vazquez
Fuzzy Similarity Measures (FSMs) are widely used for comparison of fuzzy sets, as well as fuzzy rules. A multitude of different FSMs have been proposed so far. It is not straightforward to identify a single FSM that is the most suitable for a given task. In this paper, we investigate suitability of a few FSMs for the problem of reduction of number of rules for an image segmentation process. We use Dirichlet-based approach to generate fuzzy sets that are further used for construction of fuzzy if-then rules. We analyze similarity of these rules and select a specified number of rules for image segmentation purposes. We applied this approach to two different images.
模糊相似度量(FSMs)被广泛用于模糊集和模糊规则的比较。到目前为止,已经提出了许多不同的fsm。要确定一个最适合给定任务的FSM并不简单。在本文中,我们研究了一些FSMs对图像分割过程中规则数量减少问题的适用性。我们使用基于dirichlet的方法生成模糊集,这些模糊集进一步用于模糊if-then规则的构造。我们分析这些规则的相似性,并选择一定数量的规则用于图像分割。我们将这种方法应用于两幅不同的图像。
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引用次数: 2
Performance evaluation of evolving classifier algorithms in high dimensional spaces 高维空间中进化分类器算法的性能评价
R. Rocha, F. Gomide
Evolving systems and high dimensional stream data processing algorithms are of enormous practical importance and currently are under intensive investigation. This paper introduces an evolving neural classifier approach and evaluates its performance using high dimensional data and evolving and classic classifier algorithms representative of the current state of the art. The proposed approach works in one-pass mode to simultaneously find the neural network structure and its weights using high dimensional stream data. The results suggests that the classification rate achieved by the proposed approach is very competitive with the evolving models addressed in this paper. It outperforms all of them in most of the datasets considered. Also, the approach requires the lowest per sample processing time amongst the evolving and classic batch classifiers.
进化系统和高维流数据处理算法具有巨大的实际意义,目前正在深入研究中。本文介绍了一种进化神经分类器方法,并利用高维数据和代表当前技术水平的进化和经典分类器算法对其性能进行了评估。该方法采用单遍模式,利用高维流数据同时求出神经网络结构及其权值。结果表明,该方法的分类率与本文所讨论的进化模型相比具有很强的竞争力。在考虑的大多数数据集中,它的性能优于所有这些方法。此外,该方法在进化的和经典的批分类器中需要最低的每个样本处理时间。
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引用次数: 2
Crisp to fuzzy ontology conversion in the context of social networks: A new approach 社交网络环境下的模糊本体转换:一种新方法
Hoda Safaeipour, M. F. Zarandi, S. Bastani
Fuzzy ontology is a generalization of crisp ontology for modeling uncertain information and has been applied in recent years for supporting different activities of semantic web. However, there are great collections of crisp ontologies developed so far in various domains which are not appropriate for decision making in fuzzy environment. Accordingly, this paper aims at presenting an approach to automatically convert a crisp ontology to fuzzy ontology in the context of social networks. Furthermore, this paper demonstrates that the combination of a learning process of crisp ontology with proposed approach, decreases computational complexity of fuzzy ontology learning due to breaking the task to two optimal steps. Accordingly, the approach allows for an advantageous application of various crisp clustering techniques in fuzzy ontology context.
模糊本体是模糊本体对不确定信息建模的一种推广,近年来被广泛应用于支持语义网的不同活动。然而,目前在各个领域都有大量清晰的本体,这些本体不适用于模糊环境下的决策。因此,本文旨在提出一种在社交网络环境下将清晰本体自动转换为模糊本体的方法。此外,本文还证明了将模糊本体学习过程与所提出的方法相结合,将任务分解为两个最优步骤,从而降低了模糊本体学习的计算复杂度。因此,该方法允许各种清晰的聚类技术在模糊本体上下文中的有利应用。
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引用次数: 4
Fuzzy weighted average approach to ranking projects in contractor initial bidding 承包商初始招标项目排序的模糊加权平均法
H. Alhumaidi
This paper introduces a quantitative fuzzy weighted average method to assist contractors in deciding whether to bid on a project by simulating a multiple-criteria decision making process that integrates a group of several decision-makers. The triangular fuzzy-set model is implemented to define linguistic terms used to describe subjective judgments related to decision-makers' experience level, criteria weight assessment and selection criteria rating. This paper provides an illustrative case study of project selection to demonstrate its effectiveness. The proposed method applied here to construction projects can be implemented for any type of project in any geographic area.
本文介绍了一种定量模糊加权平均方法,通过模拟一个由多个决策者组成的多准则决策过程来辅助承包商决定是否投标。采用三角模糊集模型定义语言术语,用于描述与决策者经验水平、标准权重评估和选择标准评级相关的主观判断。本文提供了一个项目选择的说明性案例来证明其有效性。本文提出的方法适用于任何地理区域的任何类型的项目。
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引用次数: 2
What if we use different “and”-operations in the same expert system 如果我们在同一个专家系统中使用不同的 "和 "操作,该怎么办?
Mahdokht Afravi, V. Kreinovich
In expert systems, we often face a problem of estimating the expert's degree of confidence in a composite statement A&B based on the known expert's degrees of confidence a = d(A) and b = d(B) in individual statements A and B. The corresponding estimate f&(a, b) is sometimes called an “and”-operation. Traditional fuzzy logic assumes that the same “and”-operation is applied to all pairs of statements. In this case, it is reasonable to justify that the “and”-operation be associative; such “and”-operations are known as t-norms. In practice, however, in different areas, different “and”-operations provide a good description of expert reasoning. As a result, when we combine expert knowledge from different areas into a single expert system, it is reasonable to use different “and”-operations to combine different statements. In this case, associativity is no longer a natural requirement. We show, however, that in such situations, under some reasonable conditions, associativity of each “and”-operation can still be deduced. Thus, in this case, we can still use associative t-norms.
在专家系统中,我们经常面临这样一个问题:根据已知专家对单个语句 A 和 B 的置信度 a = d(A)和 b = d(B),估计专家对综合语句 A&B 的置信度。传统的模糊逻辑假定所有成对的语句都采用相同的 "和 "运算。在这种情况下,有理由认为 "和 "运算是关联的;这种 "和 "运算被称为 t 规范。但实际上,在不同的领域,不同的 "和 "操作可以很好地描述专家推理。因此,当我们把不同领域的专家知识整合到一个专家系统中时,使用不同的 "和 "操作来组合不同的语句是合理的。在这种情况下,关联性不再是一个自然要求。不过,我们证明,在这种情况下,在一些合理的条件下,每个 "和 "操作的关联性仍然可以推导出来。因此,在这种情况下,我们仍然可以使用关联 t 规范。
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引用次数: 0
Computational model for measuring project complexity in construction 施工中项目复杂性度量的计算模型
L. D. Nguyen, Dai Q. Tran, An T. Nguyen, Long Le-Hoai
As construction projects are increasingly complex, a systematic approach for assessing their complexity is imperative. The Fuzzy Analytic Hierarchy Process (Fuzzy AHP) method was employed to determine the local and global weights of the criteria and sub-criteria in project complexity. The overall project complexity is quantified by a proposed measure, named complexity level (CL). A computational model was developed in MATLAB to facilitate calculations in Fuzzy AHP, conduct sensitivity analysis, and visualize results. The application of the model was illustrated in a case study of three transportation projects performed by a heavy construction company. The proposed complexity level enables engineers and managers to better anticipate potential difficulties in their complex construction projects. Scarce resources will be therefore allocated efficiently in various construction projects in a company's portfolio.
随着建设项目越来越复杂,一种评估其复杂性的系统方法势在必行。采用模糊层次分析法确定项目复杂性准则和子准则的局部权值和全局权值。整个项目的复杂性是通过一个被提议的度量来量化的,这个度量被称为复杂性级别(CL)。在MATLAB中建立了计算模型,便于模糊层次分析法的计算,进行敏感性分析,并将结果可视化。以某重型建筑公司的三个运输项目为例,说明了该模型的应用。建议的复杂性等级使工程师和管理人员能够更好地预测复杂建设项目中潜在的困难。因此,稀缺资源将有效地分配到公司投资组合中的各个建设项目中。
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引用次数: 5
FuzzRESS: A fuzzy rule-based expert system shell combining positive and negative knowledge for consultation of Vietnamese traditional medicine FuzzRESS:一种基于模糊规则的越南传统医学正负知识相结合的专家系统外壳
H. Nguyen
The aim of the paper is presenting an approach to developing a fuzzy rule based expert system shell combin-ing positive and negative knowledge for medical consultations called FuzzRESS. We extend Max-Min inference of CADIAG-2 like systems [3] by replacing Max of MaxMin rules by t-conorm and by including negative knowledge. Based on this approach, we propose a structure of FuzzRESS which consists of some main components: rule base, inference engine, explanation, interface and knowledge acquisition. The system FuzzRESS is implemented and demonstrated with diagnosis of Fever according to internal traditional medicine.
本文的目的是提出一种开发基于模糊规则的专家系统外壳的方法,该外壳结合了医学咨询的正知识和负知识,称为FuzzRESS。我们扩展了cadig -2类系统的Max- min推理[3],将MaxMin中的Max规则替换为t-一致性规则并包含负知识。在此基础上,提出了一种由规则库、推理引擎、解释、接口和知识获取等主要组成部分组成的FuzzRESS结构。以内科中医发热诊断为例,对该系统进行了实现和演示。
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引用次数: 6
Generating ternary stock trading signals using fuzzy genetic network programming 利用模糊遗传网络规划生成三元股票交易信号
Hosein Hamisheh Bahar, M. Zarandi, A. Esfahanipour
In this paper, an expert system is developed using fuzzy genetic network programming with reinforcement learning (GNP-RL) in order to generate stock trading signals based on technical indices of the stock prices. In order to increase the accuracy and reliability of results, we applied Wavelet Transform to eliminate noises and irregularities in prices. Since choosing the most appropriate wavelet base is an important decision, the Energy to Shannon Entropy Ratio, as an objective method, is used in order to address this concern. For developing this system, we applied fuzzy node transition and decision making in both processing and judgment nodes of GNP-RL. Consequently, using these method not only did increase the accuracy of node transition and decision making in GNP's nodes, but also extended the GNP's binary signals to ternary trading signals. In other words, in our proposed Fuzzy GNP-RL model, a No Trade signal is added to conventional Buy or Sell signals. The proposed model has been used to generate trading signals for ten companies listed in Tehran Stock Exchange (TSE). The simulation results in testing time period shows that the developed system has more favorable performance in comparison with the simple GNP-RL with binary signals and Buy and Hold strategy.
本文利用模糊遗传网络规划和强化学习(GNP-RL),开发了一个基于股票价格技术指标的专家系统来生成股票交易信号。为了提高结果的准确性和可靠性,我们采用小波变换去除价格中的噪声和不规则性。由于选择最合适的小波基是一个重要的决定,能量与香农熵比作为一种客观的方法,被用来解决这个问题。为了开发该系统,我们在GNP-RL的处理节点和判断节点上都应用了模糊节点转换和决策。因此,使用这些方法不仅提高了GNP节点的节点转换和决策的准确性,而且将GNP的二进制信号扩展到三元交易信号。换句话说,在我们提出的模糊GNP-RL模型中,在传统的买入或卖出信号中添加了一个No Trade信号。所提出的模型已被用于生成10家在德黑兰证券交易所(TSE)上市的公司的交易信号。测试时段的仿真结果表明,所开发的系统比具有二进制信号和买入持有策略的简单GNP-RL具有更好的性能。
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引用次数: 6
A combined fuzzy aggregation and consensus process for Multi-Criteria Group Decision Making problems 多准则群决策问题的模糊聚合与一致过程
N. Siraj, M. Omar, A. Fayek
In Multi-Criteria Group Decision Making (MCGDM) problems, aggregation and consensus methods are two key elements in reaching an overall collective value representing the group of experts making the decision. In many instances, the assessment process is based on linguistic terms rather than numerical values. Therefore, fuzzy aggregation and fuzzy consensus methods are more suitable for dealing with the linguistic terms used to reach the final decision. First, we present fuzzy set theory, fuzzy aggregation, and fuzzy consensus. Then, we describe a process for integrating fuzzy aggregation and fuzzy consensus in group decision-making problems. This process considers the aggregation of multiple criteria used for evaluation as well as the degree of consensus between the experts. Finally, we present a hypothetical case study to implement the developed process in MCGDM related to contractor selection. This paper contributes to the body of knowledge by developing a process that applies fuzzy aggregation and fuzzy consensus in solving MCGDM problems in construction. Furthermore, through the application of fuzzy set theory in aggregation and consensus, the developed process assists decision makers in problems that encompass subjectivity and uncertainty in their assessment.
在多准则群体决策(MCGDM)问题中,聚合和共识方法是获得代表决策专家群体的总体集体值的两个关键因素。在许多情况下,评估过程是基于语言术语而不是数值。因此,模糊聚合和模糊一致方法更适合于处理用于最终决策的语言术语。首先,我们提出了模糊集合理论、模糊聚集理论和模糊一致性理论。然后,我们描述了群体决策问题中模糊聚集和模糊共识的集成过程。这个过程考虑了用于评估的多个标准的总和以及专家之间的共识程度。最后,我们提出了一个假设的案例研究,以实施与承包商选择相关的MCGDM开发过程。本文通过开发一种应用模糊聚合和模糊共识的过程来解决施工中的MCGDM问题,从而为知识体系做出贡献。此外,通过在聚合和共识中应用模糊集理论,开发的过程有助于决策者在评估中包含主观性和不确定性的问题。
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引用次数: 3
Modeling of an air conditioning system through techniques of soft-computing 利用软计算技术对空调系统进行建模
H. R. D. N. Costa, A. L. Neve
This paper presents the application of soft computing techniques to a central air conditioning system aimed at efficient energy consumption. The current buildings have automation systems that provide information about the lighting, electrical system, air conditioning system etc. We studied the air conditioning system, in particular with a view to efficient energy consumption. The air conditioning system had priority in this study because its energy consumption is high.. The results of the applications were compared with the application of PID controllers, and fuzzy control system for a central air conditioning system.
本文介绍了软计算技术在以节能为目标的中央空调系统中的应用。目前的建筑物有自动化系统,提供有关照明、电气系统、空调系统等的信息。我们研究了空调系统,特别着眼于节能。由于空调系统能耗高,本研究优先考虑空调系统。将其应用结果与PID控制器和模糊控制系统在中央空调系统中的应用进行了比较。
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引用次数: 0
期刊
2016 Annual Conference of the North American Fuzzy Information Processing Society (NAFIPS)
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