Ebook
Perceptual Computing: Aiding People in Making Subjective JudgmentsISBN: 9780470599631
256 pages
July 2010, WileyIEEE Press

Description
Lotfi Zadeh, the father of fuzzy logic, coined the phrase "computing with words" (CWW) to describe a methodology in which the objects of computation are words and propositions drawn from a natural language. Perceptual Computing explains how to implement CWW to aid in the important area of making subjective judgments, using a methodology that leads to an interactive device—a "Perceptual Computer"—that propagates random and linguistic uncertainties into the subjective judgment in a way that can be modeled and observed by the judgment maker.
This book focuses on the three components of a Perceptual Computer—encoder, CWW engines, and decoder—and then provides detailed applications for each. It uses interval type2 fuzzy sets (IT2 FSs) and fuzzy logic as the mathematical vehicle for perceptual computing, because such fuzzy sets can model firstorder linguistic uncertainties whereas the usual kind of fuzzy sets cannot. Drawing upon the work on subjective judgments that Jerry Mendel and his students completed over the past decade, Perceptual Computing shows readers how to:

Map worddata with its inherent uncertainties into an IT2 FS that captures these uncertainties

Use uncertainty measures to quantify linguistic uncertainties

Compare IT2 FSs by using similarity and rank

Compute the subsethood of one IT2 FS in another such set

Aggregate disparate data, ranging from numbers to uniformly weighted intervals to nonuniformly weighted intervals to words

Aggregate multiplefired IFTHEN rules so that the integrity of word IT2 FS models is preserved
Free MATLABbased software is also available online so readers can apply the methodology of perceptual computing immediately, and even try to improve upon it. Perceptual Computing is an important goto for researchers and students in the fields of artificial intelligence and fuzzy logic, as well as for operations researchers, decision makers, psychologists, computer scientists, and computational intelligence experts.
Table of Contents
1 Introduction.
1.1 Perceptual Computing.
1.2 Examples.
1.3 Historical Origins of Perceptual Computing.
1.4 How to Validate the Perceptual Computer.
1.5 The Choice of Fuzzy Set Models for the PerC.
1.6 Keeping the PerC as Simple as Possible.
1.7 Coverage of the Book.
1.8 HighLevel Synopses of Technical Details.
References.
2 Interval Type2 Fuzzy Sets.
2.1 A Brief Review of Type1 Fuzzy Sets.
2.2 Introduction to Interval Type2 Fuzzy Sets.
2.3 Definitions.
2.4 WavySlice Representation Theorem.
2.5 SetTheoretic Operations.
2.6 Centroid of an IT2 FS.
2.7 KM Algorithms.
2.8 Cardinality and Average Cardinality of an IT2 FS.
2.9 Final Remark.
Appendix 2A. Derivation of the Union of Two IT2 FSs.
Appendix 2B. Enhanced KM (EKM) Algorithms.
References.
3 Encoding: From a Word to a Model—The Codebook.
3.1 Introduction.
3.2 Person FOU Approach for a Group of Subjects.
3.3 Collecting Interval EndPoint Data.
3.4 Interval EndPoints Approach.
3.5 Interval Approach.
3.6 Hedges.
Appendix 3A. Methods for Eliciting T1 MF Information From Subjects.
Appendix 3B. Derivation of Reasonable Interval Test.
References.
4 Decoding: From FOUs to a Recommendation.
4.1 Introduction.
4.2 Similarity Measure Used as a Decoder.
4.3 Ranking Method Used as a Decoder.
4.4 Classifier Used as a Decoder.
5 Novel Weighted Averages as a CWW Engine.
5.1 Introduction.
5.2 Novel Weighted Averages.
5.3 Interval Weighted Average.
5.4 Fuzzy Weighted Average.
5.5 Linguistic Weighted Average.
5.6 A Special Case of the LWA.
5.7 Fuzzy Extensions of Ordered Weighted Averages.
6 IF–THEN Rules as a CWW Engine—Perceptual Reasoning.
6.1 Introduction.
6.2 A Brief Overview of Interval Type2 Fuzzy Logic Systems.
6.3 Perceptual Reasoning: Computations.
6.4 Perceptual Reasoning: Properties.
7 Assisting in Making Investment Choices—Investment Judgment Advisor (IJA).
7.1 Introduction.
7.2 Encoder for the IJA.
7.3 Reduction of the Codebooks to UserFriendly Codebooks.
7.4 CWW Engine for the IJA.
7.5 Decoder for the IJA.
7.6 Examples.
7.7 Interactive Software for the IJA.
7.8 Conclusions.
References.
8 Assisting in Making Social Judgments—Social Judgment Advisor (SJA).
8.1 Introduction.
8.2 Design an SJA.
8.3 Using an SJA.
8.4 Discussion.
8.5 Conclusions.
References.
9 Assisting in Hierarchical Decision Making—Procurement Judgment Advisor (PJA).
9.1 Introduction.
9.2 Missile Evaluation Problem Statement.
9.3 PerC for Missile Evaluation: Design.
9.4 PerC for Missile Evaluation: Examples.
9.5 Comparison with Previous Approaches.
9.6 Conclusions.
Appendix 9A: Some Hierarchical Multicriteria DecisionMaking Applications.
References.
10 Assisting in Hierarchical and Distributed Decision Making— Journal Publication Judgment Advisor (JPJA)/
10.1 Introduction.
10.2 The Journal Publication Judgment Advisor (JPJA).
10.3 PerC for the JPJA.
10.4 Examples.
10.4.5 Complete Reviews.
10.5 Conclusions.
Reference.
11 Conclusions.
11.1 Perceptual Computing Methodology.
11.2 Proposed Guidelines for Calling Something CWW.
Index.
Author Information
Dongrui Wu is a Postdoctoral Research Associate at the University of Southern California, where he recently obtained his PhD in electrical engineering.