137. | C++ Neural Networks and Fuzzy Logic

C++ Neural Networks and Fuzzy Logic
by Valluru B. Rao
M&T Books, IDG Books Worldwide, Inc.
ISBN: 1558515526 Pub Date: 06/01/95

Preface

Dedication

Chapter 1—Introduction to Neural Networks

Neural Processing
Neural Network
Output of a Neuron
Cash Register Game
Weights
Training
Feedback
Supervised or Unsupervised Learning
Noise
Memory
Capsule of History
Neural Network Construction
Sample Applications

Qualifying for a Mortgage

Cooperation and Competition
Example—A Feed-Forward Network
Example—A Hopfield Network

Hamming Distance
Asynchronous Update
Binary and Bipolar Inputs
Bias

Another Example for the Hopfield Network
Summary

Chapter 2—C++ and Object Orientation

Introduction to C++
Encapsulation
Data Hiding
Constructors and Destructors as Special Functions of C++
Dynamic Memory Allocation
Overloading
Polymorphism and Polymorphic Functions
Overloading Operators
Inheritance

Derived Classes

Reuse of Code
C++ Compilers
Writing C++ Programs
Summary

Chapter 3—A Look at Fuzzy Logic

Crisp or Fuzzy Logic?
Fuzzy Sets
Fuzzy Set Operations

Union of Fuzzy Sets
Intersection and Complement of Two Fuzzy Sets

Applications of Fuzzy Logic

Examples of Fuzzy Logic
Commercial Applications

Fuzziness in Neural Networks
Code for the Fuzzifier
Fuzzy Control Systems
Fuzziness in Neural Networks
Neural-Trained Fuzzy Systems
Summary

Chapter 4—Constructing a Neural Network

First Example for C++ Implementation

Classes in C++ Implementation

C++ Program for a Hopfield Network

Header File for C++ Program for Hopfield Network
Notes on the Header File Hop.h
Source Code for the Hopfield Network
Comments on the C++ Program for Hopfield Network
Output from the C++ Program for Hopfield Network
Further Comments on the Program and Its Output

A New Weight Matrix to Recall More Patterns
Weight Determination
Binary to Bipolar Mapping

Pattern’s Contribution to Weight

Autoassociative Network
Orthogonal Bit Patterns
Network Nodes and Input Patterns
Second Example for C++ Implementation

C++ Implementation of Perceptron Network
Header File
Implementation of Functions
Source Code for Perceptron Network
Comments on Your C++ Program
Input/Output for percept.cpp

Network Modeling
Tic-Tac-Toe Anyone?
Stability and Plasticity

Stability for a Neural Network
Plasticity for a Neural Network

Short-Term Memory and Long-Term Memory
Summary

Chapter 5—A Survey of Neural Network Models

Neural Network Models
Layers in a Neural Network

Single-Layer Network

XOR Function and the Perceptron

Linear Separability
A Second Look at the XOR Function: Multilayer Perceptron
Example of the Cube Revisited
Strategy
Details
Performance of the Perceptron

Other Two-layer Networks
Many Layer Networks
Connections Between Layers
Instar and Outstar
Weights on Connections

Initialization of Weights
A Small Example
Initializing Weights for Autoassociative Networks
Weight Initialization for Heteroassociative Networks

On Center, Off Surround
Inputs
Outputs
The Threshold Function

The Sigmoid Function
The Step Function
The Ramp Function
Linear Function

Applications
Some Neural Network Models

Adaline and Madaline
Backpropagation
Figure for Backpropagation Network
Bidirectional Associative Memory
Temporal Associative Memory
Brain-State-in-a-Box
Counterpropagation
Neocognitron
Adaptive Resonance Theory

Summary

Chapter 6—Learning and Training

Objective of Learning
Learning and Training

Hebb’s Rule
Delta Rule

Supervised Learning

Generalized Delta Rule
Statistical Training and Simulated Annealing
Radial Basis-Function Networks

Unsupervised Networks

Self-Organization

Learning Vector Quantizer
Associative Memory Models and One-Shot Learning
Learning and Resonance
Learning and Stability
Training and Convergence
Lyapunov Function
Other Training Issues

Adaptation
Generalization Ability

Summary

Chapter 7—Backpropagation

Feedforward Backpropagation Network

Mapping
Layout
Training

Illustration: Adjustment of Weights of Connections from a Neuron in the Hidden Layer
Illustration: Adjustment of Weights of Connections from a Neuron in the Input Layer
Adjustments to Threshold Values or Biases
Another Example of Backpropagation Calculations
Notation and Equations

Notation
Equations

C++ Implementation of a Backpropagation Simulator

A Brief Tour of How to Use the Simulator
C++ Classes and Class Hierarchy

Summary

Chapter 8—BAM: Bidirectional Associative Memory

Introduction
Inputs and Outputs
Weights and Training

Example

Recall of Vectors

Continuation of Example
Special Case—Complements

C++ Implementation

Program Details and Flow

Program Example for BAM

Header File
Source File
Program Output

Additional Issues
Unipolar Binary Bidirectional Associative Memory
Summary

Chapter 9—FAM: Fuzzy Associative Memory

Introduction
Association
FAM Neural Network
Encoding

Example of Encoding
Recall

C++ Implementation

Program details
Header File
Source File
Output

Summary

Chapter 10—Adaptive Resonance Theory (ART)

Introduction
The Network for ART1
A Simplified Diagram of Network Layout
Processing in ART1

Special Features of the ART1 Model
Notation for ART1 Calculations
Algorithm for ART1 Calculations
Initialization of Parameters
Equations for ART1 Computations

Other Models
C++ Implementation

A Header File for the C++ Program for the ART1 Model Network
A Source File for C++ Program for an ART1 Model Network

Program Output
Summary

Chapter 11—The Kohonen Self-Organizing Map

Introduction
Competitive Learning

Normalization of a Vector

Lateral Inhibition

The Mexican Hat Function

Training Law for the Kohonen Map

Significance of the Training Law
The Neighborhood Size and Alpha

C++ Code for Implementing a Kohonen Map
The Kohonen Network

Modeling Lateral Inhibition and Excitation

Classes to be Used

Revisiting the Layer Class
A New Layer Class for a Kohonen Layer

Implementation of the Kohonen Layer and Kohonen Network
Flow of the Program and the main() Function

Flow of the Program

Results from Running the Kohonen Program

A Simple First Example
Orthogonal Input Vectors Example

Variations and Applications of Kohonen Networks

Using a Conscience
LVQ: Learning Vector Quantizer
Counterpropagation Network
Application to Speech Recognition

Summary

Chapter 12—Application to Pattern Recognition

Using the Kohonen Feature Map

An Example Problem: Character Recognition

C++ Code Development

Changes to the Kohonen Program
Testing the Program
Generalization versus Memorization
Adding Characters
Other Experiments to Try

Summary

Chapter 13—Backpropagation II

Enhancing the Simulator

Another Example of Using Backpropagation

Adding the Momentum Term

Code Changes

Adding Noise During Training
One Other Change—Starting Training from a Saved Weight File
Trying the Noise and Momentum Features
Variations of the Backpropagation Algorithm
Applications
Summary

Chapter 14—Application to Financial Forecasting

Introduction
Who Trades with Neural Networks?
Developing a Forecasting Model

The Target and the Timeframe
Domain Expertise
Gather the Data
Pre processing the Data for the Network
Reduce Dimensionality
Eliminate Correlated Inputs Where Possible
Design a Network Architecture
The Train/Test/Redesign Loop

Forecasting the S&P 500

Choosing the Right Outputs and Objective
Choosing the Right Inputs
Choosing a Network Architecture

Preprocessing Data

A View of the Raw Data
Highlight Features in the Data
Normalizing the Range
The Target
Storing Data in Different Files

Training and Testing

Using the Simulator to Calculate Error
Only the Beginning
What’s Next?

Technical Analysis and Neural Network Preprocessing

Moving Averages
Momentum and Rate of Change
Relative Strength Index
Percentage R
Herrick Payoff Index
MACD
“Stochastics”
On-Balance Volume
Accumulation-Distribution

What Others Have Reported

Can a Three-Year-Old Trade Commodities?
Forecasting Treasury Bill and Treasury Note Yields
Neural Nets versus Box-Jenkins Time-Series Forecasting
Neural Nets versus Regression Analysis
Hierarchical Neural Network
The Walk-Forward Methodology of Market Prediction
Dual Confirmation Trading System
A Turning Point Predictor
The S&P 500 and Sunspot Predictions
A Critique of Neural Network Time-Series Forecasting for Trading

Resource Guide for Neural Networks and Fuzzy Logic in Finance

Magazines
Books
Book Vendors
Consultants
Historical Financial Data Vendors
Preprocessing Tools for Neural Network Development
Genetic Algorithms Tool Vendors
Fuzzy Logic Tool Vendors
Neural Network Development Tool Vendors

Summary

Chapter 15—Application to Nonlinear Optimization

Introduction
Neural Networks for Optimization Problems
Traveling Salesperson Problem

The TSP in a Nutshell
Solution via Neural Network
Example of a Traveling Salesperson Problem for Hand Calculation

Neural Network for Traveling Salesperson Problem

Network Choice and Layout
Inputs
Activations, Outputs, and Their Updating
Performance of the Hopfield Network
C++ Implementation of the Hopfield Network for the Traveling Salesperson Problem
Source File for Hopfield Network for Traveling Salesperson Problem
Output from Your C++ Program for the Traveling Salesperson Problem
Other Approaches to Solve the Traveling Salesperson Problem

Optimizing a Stock Portfolio
Tabu Neural Network
Summary

Chapter 16—Applications of Fuzzy Logic

Introduction

A Fuzzy Universe of Applications

Section I: A Look at Fuzzy Databases and Quantification

Databases and Queries
Relations in Databases
Fuzzy Scenarios
Fuzzy Sets Revisited
Fuzzy Relations
Matrix Representation of a Fuzzy Relation
Properties of Fuzzy Relations
Similarity Relations
Resemblance Relations
Fuzzy Partial Order
Fuzzy Queries
Extending Database Models
Example
Possibility Distributions
Example
Queries

Fuzzy Events, Means and Variances

Example: XYZ Company Takeover Price
Probability of a Fuzzy Event
Fuzzy Mean and Fuzzy Variance
Conditional Probability of a Fuzzy Event
Conditional Fuzzy Mean and Fuzzy Variance

Linear Regression a la Possibilities

Fuzzy Numbers
Triangular Fuzzy Number
Linear Possibility Regression Model

Section II: Fuzzy Control
Designing a Fuzzy Logic Controller

Step One: Defining Inputs and Outputs for the FLC
Step Two: Fuzzify the Inputs
Step Three: Set Up Fuzzy Membership Functions for the Output(s)
Step Four: Create a Fuzzy Rule Base
Step Five: Defuzzify the Outputs

Advantages and Disadvantages of Fuzzy Logic Controllers
Summary

Chapter 17—Further Applications

Introduction
Computer Virus Detector
Mobile Robot Navigation
A Classifier
A Two-Stage Network for Radar Pattern Classification
Crisp and Fuzzy Neural Networks for Handwritten Character Recognition
Noise Removal with a Discrete Hopfield Network
Object Identification by Shape
Detecting Skin Cancer
EEG Diagnosis
Time Series Prediction with Recurrent and Nonrecurrent Networks
Security Alarms
Circuit Board Faults
Warranty Claims
Writing Style Recognition
Commercial Optical Character Recognition
ART-EMAP and Object Recognition
Summary