基于复合正交神经网络的自适应逆控制系统

目前，在自适应逆控制系统中常采用BP神经网络，而BP网络存在算法复杂、易陷入局部极小解等不足。而正交神经网络能克服BP网络的不足，但由于正交神经网络学习算法存在某些局限性，提出了一种复合正交神经网络，该正交网络结构与三层前向正交网络相同，不同的是正交网络的隐单元处理函数采用带参数的Sigmoid函数的复合正交函数，该神经网络算法简单，学习收敛速度快，并能对网络的函数参数进行优化，为非线性系统的动态建模提供了一种方法。仿真实验表明，网络在用于过程的自适应逆控制中具有很高的控制精度和自适应学习能力。该动态神经网络比其它神经网络具有更强的建模能力与学习适应性，有线性、非线性逼近精度高等优异特性，非常适合于实时控制系统。     

MATLAB神经网络BP网络研究与应用

阐述了MATLAB神经网络，着重研究了其BP网络的网络结构，指出了BP算法的主要缺点，利用其工具箱中的函数对BP算法进行了改进。根据MATLAB神经网络BP网络的网络结构，提出了一种具有天气敏感性的基于快速BP算法的神经网络预测模型，并对电力短期负荷进行了预测。预测结果，证明了该算法的有效性。     

基于BP神经网络模型的信息处理系统的应用分析

介绍了BP神经网络模型的网络训练学习算法，并应用其良好的自学习、自适应能力于系统信息处理中，通过信息样本对神经网络的训练，使其具有人脑的记忆、辨识能力，完成各种信息处理功能。     

利用人工神经网络SNC进行最优励磁控制

BP神经网络是一种多层结构的映射网络。由于它计算简单、存储量小，并具有分布并行处理特性，所以是目前应用最广的一种模型。本文设计了一种BP神经网络的监督学习控制器（SNC），在线性最优励磁控制的基础上，利用3层BP神经网络对柴油发电机的控制过程进行监督学习。通过对网络的训练，使其能达到实时控制的目的。仿真结果表明，所设计的SNC在系统运行方式较大的变化范围内，都能提供很好的控制性能。     

连续小波过程神经网络及其仿真研究

在小波分析和过程神经网络理论的基础上，提出了连续小波过程神经网络模型，其隐层为过程神经元，隐层激活函数采用小波函数．该网络结合了小波变换良好的时一频局域化性质及过程神经网络可以处理连续输入信号的特点，因而学习能力强，精度高．给出了小波过程神经网络学习算法，并以航空发动机滑油系统状态监测为例，分别利用传统BP网络和小波过程神经网络进行预测．结果表明，小波过程神经网络收敛速度快，精度高，优于BP网络的预测能力，同时也为航空发动机滑油系统状态监测问题提供了一种有效的方法．     

基于遗传优化神经网络的故障诊断研究

针对BP神经网络具有收敛速度慢、易陷入局部极小的缺点，利用具有全局搜索能力的遗传算法来优化BP神经网络的权值和阈值，并用遗传优化BP网络实现故障诊断。基于MATLAB实现该算法，仿真实验表明，该算法具有明显的优越性，可以避免BP算法的不足，极大地提高了网络的学习性能，具有一定的实用性。     

一种自适应遗传BP神经网络模型研究及应用

如何更有效地提高神经网络的收敛速度和收敛质量。基于遗传算法的全局搜索和BP神经网络局部精确搜索的特性，提出一种自适应遗传BP神经网络模型，该模型的主要算法是先采用一种自适应遗传算法优化BP网络初始权重。而后再进行BP网络的训练过程。最后并研究如何利用该模型进行三级跳远成绩预测。实验结果表明该方法优于传统BP算法。有利于提高网络的收敛性以及学习能力，可在一定程度上提高三级跳远成绩预测的准确率，具有一定的实用价值。     

基于遗传BP算法的手写体识别

神经网络具有模拟人类的大脑活动、良好的自学习、自适应、联想记忆、并行处理和非线形转换的能力.本文阐述了BP神经网络基本原理以及BP网络手写体识别模型,研究分析了BP神经网络手写体识别模型的缺陷并提出了优化策略.在此基础上,提出一种基于改进结构的BP神经网络来实现手写体数字识别方案,除了改进BP网的结构外,还对网络学习算法进行了改进,采用了BP和GA相结合的算法,提高了网络的学习训练速度和识别效果.     

遗传BP网络在机载雷达故障诊断中的应用研究

对遗传算法优化的BP神经网络在某型机载雷达发射机中故障诊断应用进行了研究,目的是应用遗传算法的全局最优性解决BP神经网络容易陷入局部极小的问题,从而提高BP神经网络的学习速度和精度.通过MATLAB仿真,GA-BP神经网络在发射机故障诊断中网络训练收敛速度和误差精度都明显优于BP网络,进一步验证了遗传BP神经网络学习速度快、预测精度高、泛化效果好,很适合应用于雷达等电子设备的故障诊断.     

一种基于改进的BP网的公钥密码的破译方法

该文以RSA密码系统为实例介绍了公钥密码体制的基本原理和破译，研究了神经网络在RSA密码体系中的应用，并给出了用BP神经网络来对公钥密码进行破译的基本结构及其学习算法，分析了用BP神经网络破译RsA密码的破译原理．给出了改进的BP网络模型及其学习算法，进行了仿真试验，在此基础上对构建的BP神经网络破译器的的结构进行了进一步的优化和改进，并给出了改进后的学习算法，最后对设计方法阐述了改进的必要性，试验表明方法的有效性和可行性。     

非线性系统模糊神经网络变结构自适应控制

在非线性系统的模糊动力学模型基础上,提出一种模糊神经网络变结构自适应控制器;网络的结构根据非线性系统特性动态构成,基于该网络提出非线性预测器,基于梯度法提出了一种网络参数学习算法,并分析了收敛性及其性质。将网络预测器与参数学习算法相结合,构成自适应控制算法,证明了算法的收敛性。仿真结果证实了算法的有效性。     

基于动态模糊神经网络的生物工程算法研究

目前,模糊神经网络控制在控制领域已成为一个研究热点。把神经网络应用于模糊系统,可以解决模糊系统中的知识抽取问题;把模糊系统应用于神经网络,神经网络就不再是黑箱了,人类的知识就很容易融合到神经网络中。本文提出了一种新型的动态模糊神经网络的结构及其学习算法,该动态模糊神经网络的结构基于扩展的径向基网络。其学习算法的最大特点是参数的调整和结构的辨识同时进行,且学习速度快,可用于实时建模与控制。开发了相关的算法程序,最后针对实际案例进行了仿真分析。仿真结果表明,动态模糊神经网络具有学习速度快、系统结构紧凑、泛化能力强等优点。     

一种新的模糊神经元网络学习方法

提出了一种模糊神经元网络的学习算法即利用多 层多层模糊IF/THEN规则表达专家知识的神经网络学习方法，在以此构造的基于多源信息融合的分类系统中，采用了多层模糊IF/THEN规则进行分类。为了处理模糊语言值，提出了一种能够控制模糊输入矢量的神经网络体系结构。该方法能够对非线性实间隔矢量和模糊矢量进行分类，工程实验表明，此学习算法是切实可行的。     

An adaptive fuzzy neural network for MIMO system modelapproximation in high-dimensional spaces

An adaptive fuzzy system implemented within the framework of neural network is proposed. The integration of the fuzzy system into a neural network enables the new fuzzy system to have learning and adaptive capabilities. The proposed fuzzy neural network can locate its rules and optimize its membership functions by competitive learning, Kalman filter algorithm and extended Kalman filter algorithms. A key feature of the new architecture is that a high dimensional fuzzy system can be implemented with fewer number of rules than the Takagi-Sugeno fuzzy systems. A number of simulations are presented to demonstrate the performance of the proposed system including modeling nonlinear function, operator's control of chemical plant, stock prices and bioreactor (multioutput dynamical system).     

A self-learning fuzzy logic controller using genetic algorithmswith reinforcements

This paper presents a new method for learning a fuzzy logic controller automatically. A reinforcement learning technique is applied to a multilayer neural network model of a fuzzy logic controller. The proposed self-learning fuzzy logic control that uses the genetic algorithm through reinforcement learning architecture, called a genetic reinforcement fuzzy logic controller, can also learn fuzzy logic control rules even when only weak information such as a binary target of “success” or “failure” signal is available. In this paper, the adaptive heuristic critic algorithm of Barto et al. (1987) is extended to include a priori control knowledge of human operators. It is shown that the system can solve more concretely a fairly difficult control learning problem. Also demonstrated is the feasibility of the method when applied to a cart-pole balancing problem via digital simulations     

Neural networks that learn from fuzzy if-then rules

An architecture for neural networks that can handle fuzzy input vectors is proposed, and learning algorithms that utilize fuzzy if-then rules as well as numerical data in neural network learning for classification problems and for fuzzy control problems are derived. The learning algorithms can be viewed as an extension of the backpropagation algorithm to the case of fuzzy input vectors and fuzzy target outputs. Using the proposed methods, linguistic knowledge from human experts represented by fuzzy if-then rules and numerical data from measuring instruments can be integrated into a single information processing system (classification system or fuzzy control system). It is shown that the scheme works well for simple examples     

最大-乘积模糊联想记忆的神经网络学习算法

在模糊系统中,从某种意义上说,乘积关系编码可以比最小关系编码保留更多的信息。提出了最大乘积模糊联想记忆的一种新的神经网络学习算法,并给出了严格的理论证明。该算法能够将多个模糊模式对可靠地编码存储到尽可能少的连接权矩阵中,从而大大地减少存储空间,而且容易实现,并举例验证了它的有效性。     

Numerical solution of a system of fuzzy polynomials by fuzzy neural network

In this paper, a new approach for solving systems of fuzzy polynomials based on fuzzy neural network (FNN) is presented. This method can also lead to improve numerical methods. In this work, an architecture of fuzzy neural networks is also proposed to find a real root of a system of fuzzy polynomials (if exists) by introducing a learning algorithm. Finally, we illustrate our approach by numerical examples.     

Fuzzy ARTMAP: A neural network architecture for incrementalsupervised learning of analog multidimensional maps

A neural network architecture is introduced for incremental supervised learning of recognition categories and multidimensional maps in response to arbitrary sequences of analog or binary input vectors, which may represent fuzzy or crisp sets of features. The architecture, called fuzzy ARTMAP, achieves a synthesis of fuzzy logic and adaptive resonance theory (ART) neural networks by exploiting a close formal similarity between the computations of fuzzy subsethood and ART category choice, resonance, and learning. Four classes of simulation illustrated fuzzy ARTMAP performance in relation to benchmark backpropagation and generic algorithm systems. These simulations include finding points inside versus outside a circle, learning to tell two spirals apart, incremental approximation of a piecewise-continuous function, and a letter recognition database. The fuzzy ARTMAP system is also compared with Salzberg's NGE systems and with Simpson's FMMC system.     

A novel fuzzy logic system based on N-version programming

For the consideration of different application systems, modeling the fuzzy logic rule, and deciding the shape of membership functions are very critical issues due to they play key roles in the design of fuzzy logic control system. This paper proposes a novel design methodology of fuzzy logic control system using the neural network and fault-tolerant approaches. The connectionist architecture with the learning capability of neural network and N-version programming development of a fault-tolerant technique are implemented in the proposed fuzzy logic control system. In other words, this research involves the modeling of parameterized membership functions and the partition of fuzzy linguistic variables using neural networks trained by the unsupervised learning algorithms. Based on the self-organizing algorithm, the membership function and partition of fuzzy class are not only derived automatically, but also the preconditions of fuzzy IF-THEN rules are organized. We also provide two examples, pattern recognition and tendency prediction, to demonstrate that the proposed system has a higher computational performance and its parallel architecture supports noise-tolerant capability. This generalized scheme is very satisfactory for pattern recognition and tendency prediction problems