基于克隆选择的模糊分类规则提取算法

分类是许多研究领域的关键问题，模糊规则的提取质量对分类器的性能又有着极大影响．所提取的规则不仅在分类能力上要达到最优，同时在规则数量上也不能太多，否则会影响规则搜索和匹配的速度．结合人工免疫的克隆选择原理，采用克隆选择算法，提取通过多精度模糊分割产生的大量模糊if—then规则中的少数精华规则，从而建立了模糊分类所需要的有效规则集合，同时还对优化目标函数进行了改进．经仿真实验证明，该方法所提取的模糊规则具有分类准确率高，规则数目较少等特点。     

一种基于动态聚类的模糊分类规则的生成方法

介绍了一种基于动态聚类的模糊分类规则的生成方法，这种方法能决定规则数目，隶属函数的位置及形状．首先，介绍了基于超圆雏体隶属函数的模糊分类规则的基本形式；然后，介绍动态聚类算法，该算法能将每一类训练模式动态的分为成簇，对于每簇，则建立一个模糊规则；通过调整隶属函数的斜度，来提高对训练模式分类识别率，达到对模糊分类规则进行优化调整的目的；用两个典型的数据集评测了这篇文章研究的方法，这种方法构成的分类系统在识别率与多层神经网络分类器相当，但训练时间远少于多层神经网络分类器的训练时间．     

基于免疫原理和模糊规则的分类器设计

提出一种基于免疫原理的模糊分类系统的设计方法．该算法基于生物免疫系统中的克隆选择和超变异原理，通过抗体种群的演化来优化模糊分类规则集合，可以同时确定隶属度函数形状、规则集合以及规则的数目．针对典型数据集的仿真实验表明了本文方法的有效性．     

一种基于椭圆区域的进化式模糊分类系统

介绍了一种进化式模糊分类系统.首先,介绍系统的基本特征及结构框架.然后,介绍了一种动态聚类算法,并运用动态聚类算法对输入的训练模式进行动态聚类,每一簇创建一条模糊规则.规则所对应的区域为类椭圆形区域.规则调整的策略是连续改变模糊分类规则的一个参数,使得分类系统对训练模式识别率不能再提高,对不能达到要求的调整,采用遗传算法进行调整.分析了规则调整的方法,给出了调整算法,也介绍了规则的插入和聚合策略.用两个典型的数据集来评测研究的系统,研究的分类系统在识别率与多层神经网络分类器相当,但训练时间远少于多层神经网络分类器的训练时间.     

基于粗-模糊神经网络的决策控制

通过将模糊集和粗集,神经网络结合,提出了一种基于模糊规则的新的粗模糊神经网络,它通过利用误差反向传播算法实时修正该新型网络中的权值参数,从而能被有效地应用于不确定系统的决策分类与模式识别问题.最后通过对一个不确定决策系统的模式识别的仿真结果表明该粗模糊神经网络能大大提高模式识别决策的准确率.     

基于模糊模式识别的车型分类研究

根据目前中国路桥车辆收费标准，提出了一种基于模糊模式识别的车型分类系统。车辆经过环形线圈传感器时，形成感应曲线，提取感应曲线的特征并进行特征分离，利用模糊模式识别方法对车型进行匹配分类。研究结果已在路桥收费系统以及交通流量统计中得到应用。     

模糊神经网络在数据采掘中的应用研究

提出了一种基于模糊神经网络的数据采掘新方法。该方法首先基于Rough sets思想获取初始规则和训练集，基于采掘属性的数目和分类目标确定网络结构，通过遗传(GA)算法对网络进行优化，通过BP算法实现网络权值的在线调整，最后对所生成的规则进行简化，提取模糊规则。仿真实例结果表明，该方法是行之有效的。     

基于专家经验自动提取的控制器设计方法

针对生产中一些控制过程主要依靠有经验的操作工来完成，在实现其自动控制时，操作工的经验知识难以表达，提出以半模糊语义区间来表示经验知识，用ＩＤ＾３方法提取规则，用模式识别的方法对工况进行定性分类。用神经网络定量输出控制值，对加热炉的经验知识进行了提取，并设计出控制器，试验结果表明，本方法将模糊知识表达与神经网络相结合，具有很好的鲁棒性并有自学习功能，使控制达到了预期的效果。     

基于层次分析法的模糊分类优选模型

不同的模糊分类算法在同一个数据集合上常会产生不同的模糊分类．究竟哪种方法最能揭示数据的真实结构，对此，以模糊分类有效性指标为评价指标，应用层次分析法对各模糊分类进行综合评价，建立了一个模糊分类优选模型．大量实验表明，该优选模型所选出的最优模糊分类，其模式识别率高，能揭示数据的真实结构．     

模式识别的统计模糊方法和模糊统计方法

本文在论述模式识别的统计方法和模糊方法的共同性、差异以及各自适用范围的基础上,研究了模式识别的统计模糊方法和模糊统计方法.统计模糊方法是在模糊分类器中充分利用模式分量统计信息的隶属函数,使分类性能优于普通的模糊分类器.模糊统计方法是在以统计方法为基础的分类器中,用模式分量的模糊隶属函数代替模式分量作为分类器输入.从对本文中几个数据集所作的分类试验结果看,这种方法只需要不大的训练样本集便可使分类性能接近于Bayes分类器的最佳水平.     

一种基于多目标进化算法的模糊关联分类方法

准确率和解释性是模糊关联分类模型的两个相互制约的优化目标.目前已有的研究方法中,有的只考虑了分类模型的准确率,有的把模型两个目标转化为单目标问题求解,在模型解释性目标上的优化策略较简单.为此提出一种基于Apriori和NSGA-II多目标进化算法的模糊关联分类模型(MOEA-FACM),采用基于概率独立性的模糊确认指标筛选生成高质量的模糊关联规则集,以Pittsburgh式的编码方式构建准确率和解释性折中的模糊关联分类模型.标准数据集上的实验表明,该方法所建模型分类准确率比同类模型高,分类模型具有较好的泛化能力,而其所含模糊关联规则的数目和规则前件总的模糊项的个数却较少,模型的解释性较好.     

Performance evaluation of fuzzy rule-based classification systems obtained by multi-objective genetic algorithms

In this paper, we examine the classification performance of fuzzy if-then rules selected by a GA-based multi-objective rule selection method. This rule selection method can be applied to high-dimensional pattern classification problems with many continuous attributes by restricting the number of antecedent conditions of each candidate fuzzy if-then rule. As candidate rules, we only use fuzzy if-then rules with a small number of antecedent conditions. Thus it is easy for human users to understand each rule selected by our method. Our rule selection method has two objectives: to minimize the number of selected fuzzy if-then rules and to maximize the number of correctly classified patterns. In our multi-objective fuzzy rule selection problem, there exist several solutions (i.e., several rule sets) called “non-dominated solutions” because two conflicting objectives are considered. In this paper, we examine the performance of our GA-based rule selection method by computer simulations on a real-world pattern classification problem with many continuous attributes. First we examine the classification performance of our method for training patterns by computer simulations. Next we examine the generalization ability for test patterns. We show that a fuzzy rule-based classification system with an appropriate number of rules has high generalization ability.     

Design of adaptive fuzzy model for classification problem

The main theme of this paper is to set up an adaptive fuzzy model for a new classification problem. At first, we propose a fuzzy classification model that can automatically generate the fuzzy IF-THEN rules by the features of the training database. The consequent part of the fuzzy IF-THEN rule consists of the confident value of the rule and which class the datum should belong to. Then a novel adaptive modification algorithm (AMA) is developed to tune the confident value of the fuzzy classification model. The proposed model comprises three modules, generation of the fuzzy IF-THEN rules, determination of the classification unit, and setup of the AMA. Computer simulations on the well known Wine and Iris databases have tested the performance. Simulations demonstrate that the proposed method can provide sufficiently high classification rate in comparison with other fuzzy classification models.     

AUTOMATICALLY CONSTRUCTING MEMBERSHIP FUNCTIONS AND GENERATING FUZZY RULES USING GENETIC ALGORITHMS

The most important task in designing a fuzzy classification system is to find a set of fuzzy rules from training data to deal with a specific classification problem. In recent years, many methods have been proposed to construct membership functions and generate fuzzy rules from training data for handling fuzzy classification problems. We propose a new method to generate fuzzy rules from training data by using genetic algorithms (GAs). First, we divide the training data into several clusters by using the weighted distance clustering method and generate a fuzzy rule for each cluster. Then, we use GAs to tune the membership functions of the generated fuzzy rules. The proposed method attains a higher average classification accuracy rate than the existing methods.     

Effect of rule weights in fuzzy rule-based classification systems

This paper examines the effect of rule weights in fuzzy rule-based classification systems. Each fuzzy IF-THEN rule in our classification system has antecedent linguistic values and a single consequent class. We use a fuzzy reasoning method based on a single winner rule in the classification phase. The winner rule for a new pattern is the fuzzy IF-THEN rule that has the maximum compatibility grade with the new pattern. When we use fuzzy IF-THEN rules with certainty grades, the winner is determined as the rule with the maximum product of the compatibility grade and the certainty grade. In this paper, the effect of rule weights is illustrated by drawing classification boundaries using fuzzy IF-THEN rules with/without certainty grades. It is also shown that certainty grades play an important role when a fuzzy rule-based classification system is a mixture of general rules and specific rules. Through computer simulations, we show that comprehensible fuzzy rule-based systems with high classification performance can be designed without modifying the membership functions of antecedent linguistic values when we use fuzzy IF-THEN rules with certainty grades     

一种基于模糊规则的分类方法

本文提出了一种基于模糊规则的分类方法。首先介绍了一种新的模糊规则提取方法,然后基于所提取的模糊规则给出了一个采用二级判决的分类算法,并利用IRIS数据对此分类算法进行了仿真测试。结果表明,该算法在训练样本较少的情况下,仍能得到很好的分类效果.     

Designing of classifiers based on immune principles and fuzzy rules

This paper proposed an algorithm to design a fuzzy classification system based on immune principles. The proposed algorithm evolves a population of antibodies based on the clonal selection and hypermutation principles. The membership function parameters and the fuzzy rule set including the number of rules inside it are evolved at the same time. Each antibody (candidate solution) corresponds to a fuzzy classification rule set. We compared our algorithm with other classification schemes on some benchmark datasets. The results demonstrated the effectiveness of the proposed immune algorithm.     

Selecting fuzzy if-then rules for classification problems usinggenetic algorithms

This paper proposes a genetic-algorithm-based method for selecting a small number of significant fuzzy if-then rules to construct a compact fuzzy classification system with high classification power. The rule selection problem is formulated as a combinatorial optimization problem with two objectives: to maximize the number of correctly classified patterns and to minimize the number of fuzzy if-then rules. Genetic algorithms are applied to this problem. A set of fuzzy if-then rules is coded into a string and treated as an individual in genetic algorithms. The fitness of each individual is specified by the two objectives in the combinatorial optimization problem. The performance of the proposed method for training data and test data is examined by computer simulations on the iris data of Fisher     

基于BP网的符号规则生成

本文提出一种训练标准ＢＰ网络的方法，该方法能以模糊判定规则的形成立即解释连接权值。该方法可以用来从一组例子中生成的的分类规则，同样也能用来简化已有的规则库。