新型模糊形态神经网络及其应用研究

该文在简要介绍形态学神经网络(MorphologicalNeuralNetwork,简称MNN)的基础上,提出了一种新型的模糊形态学神经网络,给出了其相应的模型。结合实例,比较了常见BP网络、形态学BP神经网络和模糊形态BP神经网络的训练结果和性能。实验结果表明,这种新型的神经网络具有较高的识别率和适应能力,同时此新型神经网络的提出丰富了神经网络模糊技术的研究。     

基于正交多项式函数的神经网络及其性质研究

神经网络的非线性逼近能力的研究是神经网络研究中的一个热点问题。该文提出了基于正交多项式函数的神经网络构造理论,以此为基础提出了基于正交多项式函数的神经网络的构造方法,利用Stone-Weierstrass定理从理论上证明了基于正交多项式函数的神经网络具有能以任意精度逼近任意紧集上的连续函数的全局逼近性质,最后,提出了基于正交多项式函数的神经网络的选择和评价方法,研究表明,在一定条件下,当选择Chebyshev多项式时,所构造出的神经网络性能最优。     

神经网络与模糊逻辑的集成及其在列车控制系统中的应用

针对神经网络的学习算法存在的缺陷,将模糊逻辑集成进神经网络的学习过程中,提出了一种Ｆ－ＢＰ算法,大大地加快了神经网络的学习速度。在此基础上,提出了一种在学习算法,在线的调整神经网络的参数,使神经网络能动态适应环境。     

基于神经网络的软件模块风险性预测模型

采用学习矢量量化神经网络对软件质量进行预测,提出基于学习矢量量化神经网络的软件模块风险性预测模型,与BP神经网络预测模型相比,实验结果表明提出的模型获得更精确的预测效果。     

基于神经网络的开关电器设计与算法

根据神经网络的基本理论，研究了神经网络在电器设备中的应用．提出了神经网络的分块构造方法和神经网络分块学习算法．并通过实验模拟达到实际要求。     

灰色系统与神经网络融合技术探索

本语文分析了灰色系统、神经网络的各自特点,论述了灰色系统与神经网络间的关系,分析了灰色系统与神经网络的结合方式,并提出一种新的灰色系统与神经网络融合方式即灰色神经网络。     

神经网络的故障诊断方法研究

结合神经网络的故障模型，提出了用神经网络来诊断神经网络和用基因算法来诊断神经网络的方法，并通过实验对两种算法进行了比较。     

基于BP神经网络和Bagging算法的入侵检测

提出基于Bagging算法集成BP神经网络的入侵检测方法。采用BP神经网络为分类器,以用户的网络连接行为为特征进行检测,为进一步提高BP神经网络的分类性能,采用Bagging算法对BP神经网络分类器进行加权投票。实验表明,提出的方法具有良好的检测性能。     

基于Adaboost算法的交通事件检测

提出一种Adaboost BP神经网络的交通事件检测方法:以上下游的流量和占有率作为特征,用BP神经网络作为分类器进行交通事件的自动分类与检测.在BP神经网络的训练过程中,提出一种新的训练算法,提高了神经网络的分类能力.为了进一步提高神经网络的泛化能力,采用改进的Adaboost算法,进行网络集成.运用Matlab进行仿真分析.结果表明所提出的交通事件检测算法具有较好的检测性能.     

基于神经网络集成的思维脑电信号分类方法

提出基于神经网络集成算法的思维脑电信号分类方法,采用BP神经网络为分类器,对用AR参数提取的思维脑电特征进行分类。为进一步提高BP神经网络的分类性能,采用Bagging算法对BP神经网络分类器进行加权投票,实验表明,提出的方法具有很好的分类效果。     

A neural fuzzy system with linguistic teaching signals

A neural fuzzy system learning with linguistic teaching signals is proposed. This system is able to process and learn numerical information as well as linguistic information. It can be used either as an adaptive fuzzy expert system or as an adaptive fuzzy controller. First, we propose a five-layered neural network for the connectionist realization of a fuzzy inference system. The connectionist structure can house fuzzy logic rules and membership functions for fuzzy inference. We use α-level sets of fuzzy numbers to represent linguistic information. The inputs, outputs, and weights of the proposed network can be fuzzy numbers of any shape. Furthermore, they can be hybrid of fuzzy numbers and numerical numbers through the use of fuzzy singletons. Based on interval arithmetics, two kinds of learning schemes are developed for the proposed system: fuzzy supervised learning and fuzzy reinforcement learning. Simulation results are presented to illustrate the performance and applicability of the proposed system     

A neural fuzzy system with fuzzy supervised learning

A neural fuzzy system learning with fuzzy training data (fuzzy if-then rules) is proposed in this paper. This system is able to process and learn numerical information as well as linguistic information. At first, we propose a five-layered neural network for the connectionist realization of a fuzzy inference system. The connectionist structure can house fuzzy logic rules and membership functions for fuzzy inference. We use alpha-level sets of fuzzy numbers to represent linguistic information. The inputs, outputs, and weights of the proposed network can be fuzzy numbers of any shape. Furthermore, they can be hybrid of fuzzy numbers and numerical numbers through the use of fuzzy singletons. Based on interval arithmetics, a fuzzy supervised learning algorithm is developed for the proposed system. It extends the normal supervised learning techniques to the learning problems where only linguistic teaching signals are available. The fuzzy supervised learning scheme can train the proposed system with desired fuzzy input-output pairs which are fuzzy numbers instead of the normal numerical values. With fuzzy supervised learning, the proposed system can be used for rule base concentration to reduce the number of rules in a fuzzy rule base. Simulation results are presented to illustrate the performance and applicability of the proposed system.     

An efficient compensatory neuro-fuzzy system and its applications

In this study, a compensatory neuro-fuzzy system (CNFS) is proposed. The compensatory fuzzy reasoning method uses adaptive fuzzy operations of a neuro-fuzzy system to make the fuzzy logic system more adaptive and effective. Furthermore, an online learning algorithm that consists of structure learning and parameter learning is proposed to automatically construct the CNFS. The structure learning is based on the fuzzy similarity measure to determine the number of fuzzy rules, and the parameter learning is based on backpropagation algorithm to adjust the parameters. The simulation results have shown that (1) the CNFS model converges quickly and (2) the CNFS model has a lower root mean square (RMS) error than other models.     

一种基于神经网络的模糊方法研究

模糊系统设计中,模糊规则的建立是系统设计的瓶颈问题。针对这一问题,该文提出了一种用于监督神经网络自动生成模糊规则并实现模糊推理的方法。网络训练分为两个阶段,首先是结构学习,确定系统的规则总数和前提的有关参数;其次是参数学习,即调整权值,使系统输出接近理想输出。仿真实例证明使用该方法建立模糊系统具有较好的效果。     

基于修剪策略的D-FNN直接逆控制算法研究

神经网络是模拟人脑结构,它具有大规模并行及分布式信息处理能力,但是不能处理和描述模糊信息.模糊系统具有推理过程容易理解,但它很难实现自适应学习的功能.如果结合神经网络与模糊系统,可以取长补短.基于此,本文提出了一种新型动态模糊神经网络（Dynamic fuzzy neural network,D-FNN）学习算法.因为它具有结构和参数同时调整且学习速度快等优点,所以既可以在模糊逻辑系统中包含低级的神经网络学习和计算功能,也可以为神经网络提供高级的类似人的思维和推理的模糊逻辑系统.此外,本文还开发了生物医学工程应用算法程序,针对药物注射系统的直接逆控制案例进行了仿真,结果表明：D-FNN具有实时学习和控制能力强、参数估计和结构辨识同时进行等优点.     

On-line constructive fuzzy sliding-mode control for voice coil motors

In this paper, a voice coil motor (VCM) featuring fast dynamic performance and high position repeatability is developed. To achieve robust VCM control performance under different operating conditions, an on-line constructive fuzzy sliding-mode control (OCFSC) system, which comprises of a main controller and an exponential compensator, is proposed. In the main controller, a fuzzy observer is used to on-line approximate the unknown nonlinear term in the system dynamics with on-line structure learning and parameter learning using a gradient descent algorithm. According to the structure learning mechanism, the fuzzy observer can either increase or decrease the number of fuzzy rules based on tracking performance. The exponential compensator is applied to ensure the system stability with a nonlinear exponential reaching law. Thus, the chattering signal can be alleviated and the convergence of tracking error can be speed up. Finally, the experimental results show that not only the OCFSC system can achieve good position tracking accuracy but also the structure learning ability enables the fuzzy observer to evolve its structure on-line.     

基于自适应模糊网络的在线辨识

研究了基于一阶Sugeno的自适应网络模糊推理系统（ANFIS）进行在线辨识的方法。给出了该自适应网络的结构,在此基础上给出了网络权值的修正算法,即综合最陡下降法和最小二乘法得到的一种混合学习算法。对一个非线性模型进行了数字仿真,得到的在线辨识的结果优于采用反传算法的普通神经网络辨识方法。由此证明,一阶Sugeno模糊推理模型和混合学习算法的采用,使得该辨识方法具备网络结构简单、收敛速度快的优势,便于工程实现。     

竞争式Takagi-Sugeno模糊再励学习

针对连续空间的复杂学习任务,提出了一种竞争式Takagi-Sugeno模糊再励学习网络(CTSFRLN),该网络结构集成了Takagi-Sugeno模糊推理系统和基于动作的评价值函数的再励学习方法.文中相应提出了两种学习算法,即竞争式Takagi-Sugeno模糊Q-学习算法和竞争式Takagi-Sugeno模糊优胜学习算法,其把CTSFRLN训练成为一种所谓的Takagi-Sugeno模糊变结构控制器.以二级倒立摆控制系统为例,仿真研究表明所提出的学习算法在性能上优于其它的再励学习算法.     

基于免疫原理的T-S模糊系统在线建模方法

基于人工免疫原理，提出一种在线构造T-S模糊系统的建模方法．该方法结合网格空间划分方法，以建模数据为抗原，模糊规则为抗体，采用人工免疫原理确定系统结构，并应用最小二乘方法估计线性规则后件参数．该方法具有简单、学习速度快、实时性强等特点，适合多输入模糊系统的在线学习和结构调整．     

Reinforcement learning for an ART-based fuzzy adaptive learningcontrol network

This paper proposes a reinforcement fuzzy adaptive learning control network (RFALCON), constructed by integrating two fuzzy adaptive learning control networks (FALCON), each of which has a feedforward multilayer network and is developed for the realization of a fuzzy controller. One FALCON performs as a critic network (fuzzy predictor), the other as an action network (fuzzy controller). Using temporal difference prediction, the critic network can predict the external reinforcement signal and provide a more informative internal reinforcement signal to the action network. The action network performs a stochastic exploratory algorithm to adapt itself according to the internal reinforcement signal. An ART-based reinforcement structure/parameter-learning algorithm is developed for constructing the RFALCON dynamically. During the learning process, structure and parameter learning are performed simultaneously. RFALCON can construct a fuzzy control system through a reward/penalty signal. It has two important features; it reduces the combinatorial demands of system adaptive linearization, and it is highly autonomous.