一种基于改进T-S模糊推理的模糊神经网络学习算法

针对模糊神经网络学习算法计算量过大,在预测模型设计中提出了基于改进T-S模糊推理的模糊神经网络学习算法。主要工作如下:首先,改进T-S模糊推理方法,定义基于偏移率的T-s模糊推理方法;然后,通过将此模糊推理方法与基于合成规则的模糊推理方法及距离型模糊推理方法相比较可以看出,所提方法有较少的计算量,且比较有效;最后,在此基础上改善了模糊神经网络学习算法,并将其应用于天气预测与安全态势预测。测试结果表明,该方法明显改善了学习效率,减少了预测模型设计中的学习次数与时间复杂度,并降低了学习误差。     

基于粗糙集与数据库技术的故障诊断方法研究

提出一种基于粗糙集的抽取和过滤规则的方法,研究与讨论了数据库技术在实现知识自动获取和简化推理机设计方面的应用,结果表明推理机算法简单且可以满足复杂的实时故障诊断的需要.     

基于模糊知识的混合推理技术研究与应用

针对模糊知识的内在联系,提出了一种模糊推理与逆向推理相结合的混合推理技术,介绍了该技术的设计思想,结合模糊知识实现了算法,重点论述了模糊推理与逆向推理相结合的推理过程,实现了一种较为理想的不确定性推理方法,有效地提高了推理机的执行效率。     

基于改进Drools规则引擎算法的兵力接替系统研究

随着作战需求的多样化,一些复杂的业务规则很难推导出精确的算法或抽象出合适的数据模型,因此将业务规则与软件代码分开引入规则引擎已成为一种主流趋势。Drools规则引擎作为决策系统的推理机,采用Rete算法实现推理机的规则匹配,有着较高的效率,能够较好匹配兵力接替系统。本文介绍了基于Drools规则引擎的兵力接替系统的设计方法及实现,具体设计了作战规则、并提出策略匹配的改进冲突消解算法,对此方法进行了实验比较,实验证明此方法大大增强了系统的开发效率和后期软件的维护成本。     

基于h-水平截集的模糊神经网络在专家系统推理中的应用

本文给出了基于h-水平截集的模糊神经网络模型及其改进学习算法,并以减摇鳍故障诊断为例来实现专家系统的模糊推理,以克服传统专家系统推理机的不足.     

一种在关系数据库上实现的模糊双向推理网络——介绍模糊推理语言FUZZYLOG的推理机构

本文提出了一种新型的模糊推理语言FUZZYLOG,介绍了该语言使用的网络式模糊知识库结构,并重点叙述了基于这种结构的网络式推理机的设计思想和实现算法,以及为提高效率和推理精度而设计的“最大子式匹配算法”。     

一种模糊知识库系统及其推理机制研究

介绍了一种具有模糊推理机制的模糊知识系统的基本结构、知识表示和推理机制,阐述了在模糊知识库设计与实现中,模糊推理机构造和工作流程设计的方法。该系统推理机制是基于传统RETE算法的扩展,通过使用相似性方法来处理模糊问题,实现了一种较为理想的不确定性推理;同时系统采用正向和反向推理相结合的双向推理机,使推理具有较高的准确性。最后给出了一个实例验证系统可行性。     

支持向量机-模糊推理自学习控制器设计

常规的模糊推理系统大多由专家经验建立模糊规则,自学习能力不强.提出了一种支持向量机-模糊推理系统,由支持向量机实现模糊推理系统的自学习,并设计了一种支持向量机-模糊推理自学习控制器.文章给出了自学习控制器的结构和学习算法,对比研究了变尺度梯度优化和混沌优化两种学习算法.针对非线性对象的仿真实验验证了该控制器的优良性能,控制效果比模糊逻辑控制器更好.     

基于多种知识表示下的常规推理机的设计与实现

多种知识表示和多推理机制是专家系统的一个新的研究方向。本文介绍多用户环境下专家系统工具研制中，常规推理机的设计与实现，即基于一定方式结合的框架与规则知识表示的框架推理机的规则推理机设计思想及实现方法。     

一种模糊知识库系统及其推理机制研究

介绍了一种具有模糊推理机制的模糊知识系统的基本结构、知识表示和推理机制，阐述了在模糊知识库设计与实现中，模糊推理机构造和工作流程设计的方法。该系统推理机制是基于传统PETE算法的扩展，通过使用相似性方法来处理模糊问题，实现了一种较为理想的不确定性推理；同时系统采用正向和反向推理相结合的双向推理机，使推理具有较高的准确性。最后给出了一个实例验证系统可行性。     

基于证据推理的确定因子规则库推理方法

不确定性推理方法是人工智能领域的一个主要研究内容,If-then规则是人工智能领域最常见的知识表示方法. 文章针对实际问题往往具有不确定性的特点,提出基于证据推理的确定因子规则库推理方法.首先在If-then规则的基础上给出确定因子结构和确定因子规则库知识表示方法,该方法可以有效利用各种类型的不确定性信息,充分考虑了前提、结论以及规则本身的多种不确定性. 然后,提出了基于证据推理的确定因子规则库推理方法. 该方法通过将已知事实与规则前提进行匹配,推断结论并得到已知事实条件下的前提确定因子;进一步,根据证据推理算法得到结论的确定因子. 文章最后,通过基于证据推理的确定因子规则库推理方法在UCI数据集分类问题的应用算例,说明该方法的可行性和高效性.     

A Fuzzy Inference Network Model for Search Strategy Using Neural Logic Network

In this paper, a fuzzy inference network model for search strategy using neural logic network is presented. The model describes search strategy, and neural logic network is used to search. Fuzzy logic can bring about appropriate inference results by ignoring some information in the reasoning process. Neural logic networks are powerful tools for the reasoning process but not appropriate for the logical reasoning. To model human knowledge, besides the reasoning process capability, the logical reasoning capability is equally important. Another new neural network called neural logic network is able to do the logical reasoning. Because the fuzzy inference is a fuzzy logical reasoning, we construct a fuzzy inference network model based on the neural logic network, extending the existing rule inference network. And the traditional propagation rule is modified.     

The linked inference principle,I: The formal treatment

In this article we present a detailed, formal treatment of the linked inference principle, and we apply this principle to obtain the abstract formulations of various linked inference rules. Included among such rules are linked UR-resolution, linked hyperresolution, and linked binary resolution, each of which generalizes the corresponding standard and well-known inference rule. In addition to the formalism, we discuss the motivation and objectives for the formulation of linked inference rules. We also include experimental results and numerous examples. In particular, we show how and why the effectiveness of an automated reasoning program can be, and often is, markedly increased by relying on the linked version rather than the more familiar standard version of an inference rule.This work was supported by the Applied Mathematical Sciences subprogram of the Office of Energy Research, U.S. Department of Energy, under Contract W-31-109-Eng-38.     

模糊控制的模糊推理分析

分析了使用RZ算子时推理合成规则(CRI)不具有还原性和不能正确进行模糊推理的原因,给出了正确应用CRI的条件;分析了全蕴涵3I算法的不足及其具有还原性的原因;对各种蕴涵算子的模糊推理进行分析比较,得到了正确的推理算法;对模糊推理在理论和实际应用中的矛盾作了具体说明.     

基于规则推理网络的分类模型

为了缓解神经网络的“黑盒子”机制引起的算法可解释性低的问题,基于使用证据推理算法的置信规则库推理方法(以下简称RIMER)提出了一个规则推理网络模型.该模型通过RIMER中的置信规则和推理机制提高网络的可解释性.首先证明了基于证据推理的推理函数是可偏导的,保证了算法的可行性;然后,给出了规则推理网络的网络框架和学习算法,利用RIMER中的推理过程作为规则推理网络的前馈过程,以保证网络的可解释性;使用梯度下降法调整规则库中的参数以建立更合理的置信规则库,为了降低学习复杂度,提出了“伪梯度”的概念;最后,通过分类对比实验,分析了所提算法在精确度和可解释性上的优势.实验结果表明,当训练数据集规模较小时,规则推理网络的表现良好,当训练数据规模扩大时,规则推理网络也能达到令人满意的结果.     

General purpose inference engine for canonical graph models

The design and implementation of a General Purpose Inference Engine for canonical graph models that is both flexible and efficient is addressed. Conventional inference techniques (e.g. forward chaining, backward chaining and mixed strategies) are described, and new modes of flexibility through the provision of inexact matching between data and assertions/rules are explained. In GPIE, scanning/searching of the rules in the rule base is restricted to a minimum during execution, but at the expense of compilation of the rule set prior to execution. The generality of the rule set is transparent to the inference engine, thereby permitting reasoning at various levels. This research demonstrates that a graph-based inference engine offering flexible control structures and inxact matching can complement intermediate notations, such as conceptual graphs, offering the expressive power of a rich knowledge representation formalism. The availability of an extendible graph processor for building appropriate canonical graph models presents the exciting prospect of a general purpose reasoning engine.     

The construction of a fuzzy inference network by extension of the rule inference network

Fuzzy logic can bring about inappropriate inferences as a result of ignoring some information in the reasoning process. Neural networks are powerful tools for pattern processing, but are not appropriate for the logical reasoning needed to model human knowledge. The use of a neural logic network derived from a modified neural network, however, makes logical reasoning possible. In this paper, we construct a fuzzy inference network by extending the rule–inference network based on an existing neural logic network. The propagation rule used in the existing rule–inference network is modified and applied. In order to determine the belief value of a proposition pertaining to the execution part of the fuzzy rules in a fuzzy inference network, the nodes connected to the proposition to be inferenced should be searched for. The search costs are compared and evaluated through application of sequential and priority searches for all the connected nodes.     

一个有效的加权不精确推理算法

本文针对医疗诊断推理的难点,给出了一个借助矩阵的变换来实现推理的不精确推理算法,并通过实例解释了算法的推理过程;该算法考虑了规则中命题的权重、规则的可信度,表现出良好的适应性.     

基于可拓规则的故障诊断专家系统推理机的研究

针对传统产生式规则在知识表示、匹配冲突等方面存在的局限,提出了一种将可拓规则用于故障诊断专家系统推理机的方法;该方法重点研究了可拓规则的匹配原理和可拓推理机算法思想,提出了匹配度计算方法并用来计算故障条件与规则前件的匹配度;根据研究表明,利用可拓规则进行推理,不仅在知识表示上比传统产生式规则推理有所提高,而且还解决了传统专家系统容易出现匹配冲突等问题;最后以AMU故障推理为例,说明可拓推理机具有推理速度快、效率高等优点,取得了较好的推理效果.     

Knowledge modeling based on interval-valued fuzzy rough set and similarity inference: prediction of welding distortion

Knowledge-based modeling is a trend in complex system modeling technology. To extract the process knowledge from an information system, an approach of knowledge modeling based on interval-valued fuzzy rough set is presented in this paper, in which attribute reduction is a key to obtain the simplified knowledge model. Through defining dependency and inclusion functions, algorithms for attribute reduction and rule extraction are obtained. The approximation inference plays an important role in the development of the fuzzy system. To improve the inference mechanism, we provide a method of similaritybased inference in an interval-valued fuzzy environment. larity based approximate reasoning, an inference result is Combining the conventional compositional rule of inference with simideduced via rule translation, similarity matching, relation modification, and projection operation. This approach is applied to the problem of predicting welding distortion in marine structures, and the experimental results validate the effectiveness of the proposed methods of knowledge modeling and similarity-based inference.