Dissertations / Theses: 'Expert systems'

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Erturk, Alper. "An expert system for reward systems design." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2000. http://handle.dtic.mil/100.2/ADA383532.

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Thesis (M.S. in Information Technology Management and M.S. in Systems Management) Naval Postgraduate School, Sept. 2000.
Thesis advisor(s): Jansen, Erik; Nissen, Mark E. Includes bibliographical references (p. 93-94). Also available online.

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Fisher, David B. "Expert systems in typography /." Online version of thesis, 1990. http://hdl.handle.net/1850/10583.

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Minnema, James E. "Expert systems and Command." Thesis, Monterey, California. Naval Postgraduate School, 1989. http://hdl.handle.net/10945/25934.

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This thesis examines the organizational causes of the Department of Defense's (DoD) inability to acquire working defense systems. One major cause of this is identified as a lack of a sufficient number of trained and experienced acquisition personnel. An examination of the definitions of Decision Support and Expert Systems is made to determine their suitability for application to this problem. The information system framework of Gorry and Scott Morton is used to structure the acquisition problem. The DoD acquisition problem is found to be a good candidate for the application of expert systems. An expert system architecture is developed to provide acquisition personnel both technical and management support. Use of a central mainframe, connected to the Defense Data Network will provide nationwide access, with centralized control of the knowledge base. The architecture allows for the incorporation of existing conventional software under expert software control. In order to reduce development cost and time, the use of existing DoD manuals, as the knowledge base, is proposed. A prototype module, utilizing the M.1 expert shell and DoD Manual 4245.7-M and NAVSO P-6071 is developed to prove the feasibility of this approach

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Davies, Peter Leslie. "Prolog and expert systems." Thesis, Durham University, 1987. http://etheses.dur.ac.uk/6710/.

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The first part of the thesis provides an introduction to the logic programming language Prolog and some areas of current research. The use of compilation to make Prolog faster and more efficient is studied and a modified representation for complex structures is presented. Two programming tools are also presented. The second part of the thesis focuses on one problem which arises when implementing an Expert System using Prolog. A practical three-valued Prolog implementation is described. An interpreter accepts three-valued formulae and converts these into a Prolog representation. Formulae are in clausal form which allows disjunctive conclusions to rules. True and false formulae are stated explicitly and therefore the interpreter is able to perform useful consistency checks when information is added to the data base.

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MacRae, John R. "Connectionism in expert systems." Thesis, University of Aberdeen, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.277364.

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As the technology of computer systems matures, it is becoming clear that conventional techniques are inadequate for complex applications, and attention is being increasingly directed at the use of Knowledge-Based Systems technology. Critical problems in Knowledge-Based Systems are the representation of the expertise from the selected application, and in harnessing sufficient computing power to utilise the stored expertise. An idea which is currently popular in Artificial Intelligence research is that of using parallel processing to ensure that the expertise or knowledge is used effectively, within realistic timescales. Proposals vary in the degree of parallelism, and in the distribution of the problem solving activities. The theory of connectionism, which proposes that the knowledge representation and the problem solving computations are distributed across a very large number of processors, has generated considerable interest and response. Connectionist machines, sometimes known as massively parallel processors, are not highly parallel versions of conventional problem solving engines, but combine the representation of the problem with the processing to produce what is known as an active memory network. Research is described which investigates the application of connectionist theory to various complex problems. These problems are investigated within the context of conventional knowledge-based systems, with the aim of establishing if massively parallel technology realises an efficient problem solving engine. The difficulties associated with the representation and use of numbers in connectionist networks are addressed, the problem of relating the knowledge representation in expert systems to that in connectionist networks is resolved, and the potential for medium scale parallelism in knowledge-based systems is contrasted with the parallelism of connectionism. Finally, the vision of an ideal problem solving engine is considered; some aspects of the evolving designs approach this ideal, and are described.

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Ali, Mohammad. "Micro expert." Virtual Press, 1991. http://liblink.bsu.edu/uhtbin/catkey/774767.

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The purpose of this research was to investigate different approaches to expert system design and implementation. The resulting research information was used to create a microcomputer based expert system for the university computer services. The aim of this expert system is to help users (students, faculty, and staff) with micro computer purchases. As part of the research various interviews were conducted with prospective computer purchasers and the micro computer experts. This approach was taken to ensure that the system was easy to use and that it provided all users with vital information regarding the purchase of a computer system. Micro Expert was developed on IBM architecture using a commercially available expert system shell and 'C' programming language.The beta testing stage of the system was used to conduct more interviews and questionnaires with the microcomputer experts. This process was used to ensure that the product covered the most common questions of the users and provided adequate help and information on purchases.
Department of Computer Science

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McCauley, Bob. "Expert Systems in Data Acquisition." International Foundation for Telemetering, 1987. http://hdl.handle.net/10150/615229.

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International Telemetering Conference Proceedings / October 26-29, 1987 / Town and Country Hotel, San Diego, California
In an Independent Research and Development (IR&D) effort, the Telemetry Systems Operation (TSO) of Computer Sciences Corporation (CSC) sought to determine the feasibility of using Artificial Intelligence (AI) techniques in a real-time processing environment. Specifically, the use of an expert system to assist in telemetry data acquisition processing was studied. A prototype expert system was implemented with the purpose of monitoring F15 Vertical Short Take Off and Landing (VSTOL) aircraft engine tests in order to predict engine stalls. This prototype expert system was implemented on a Symbolics 3670 symbolic processor using Inference Corporation's Artificial Reasoning Tool (ART) expert system compiler/generator. The Symbolics computer was connected to a Gould/SEL 32/6750 real-time processor using a Flavors, Inc. Bus Link for real-time data transfer.

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Nannetti, Federica. "Expert Systems in Maintenance Diagnostic." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2017.

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Lo scopo di questo lavoro è introdurre il lettore all’utilizzo dei sistemi esperti nell’ambito manutentivo, specialmente riguardo alla diagnostica. La struttura della dissertazione è articolata in tre parti principali. La prima consiste in una panoramica sulla manutenzione e sui metodi più comuni che ne fanno parte, focalizzandosi specialmente su quelli che sono più attinenti ai sistemi esperti. Nella seconda parte il lettore può trovare le tipologie, le caratteristiche rilevanti e la storia dei sistemi esperti. L’ultima parte della tesi è dedicata allo sviluppo del caso di studio, introdotto da una descrizione del software utilizzato per la sua progettazione (VisiRule). A conclusione del lavoro sono presentate delle considerazioni sugli aspetti positivi dell’utilizzo di sistemi esperti nell’ambito della diagnostica manutentiva.

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Scott, Lawrence Gill. "Explanations in hybrid expert systems." Thesis, University of British Columbia, 1990. http://hdl.handle.net/2429/28741.

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This thesis addresses the problem of providing explanations for expert systems implemented in a shell that supports a hybrid knowledge representation architecture. Hybrid representations combine rules and frames and are the predominant architecture in intermediate and high-end commercial expert system shells. The main point of the thesis is that frames can be endowed with explanation capabilities on a par with rules. The point is illustrated by a partial specification for an expert system shell and sample explanations which could be generated by an expert system coded to that specification. As background information, the thesis introduces expert systems and the standard knowledge representation schemes that support them: rule-only schemes, and hybrid schemes that combine rules with frames. Explanations for expert systems are introduced in the context of rules, since rules are the only representation for which explanations are supported, either in commercial tools or in the preponderance of research. The problem addressed by the thesis, how to produce explanations for hybrid architectures, is analyzed in two dimensions. Research was surveyed in three areas for guiding principles toward solving the problem: frame logic, metalevel architectures, and reflective architectures. With the few principles that were discovered in hand, the problem is then analyzed into a small number of subproblems, mainly concerning high-level architectural decisions. The solution proposed to the problem is described in two ways. First a partial specification for expert system shell functionality is offered, which describes, first, object structures and, then, behaviors at three points in time—object compilation time, execution time, and explanation generation time. The second component of the description is a set of extended examples which illustrate explanation generation in a hypothetical expert system. The solution adopts principles of reflective architectures, storing metainformation for explanations in metaobjects which are distinct from the object-level objects they explain. The most novel contribution of the solution is a scheme for relating all the ways that objects' slot values may be computed to the goal tree construct introduced by the seminal Mycin expert system. The final chapter explores potential problems with the solution and the possibility of producing better explanations for hybrid expert system shell architectures.
Science, Faculty of
Computer Science, Department of
Graduate

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McAulay, Lawrence. "Expert systems in management accountancy." Thesis, Loughborough University, 1993. https://dspace.lboro.ac.uk/2134/7412.

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Ramsbottom, David John. "Expert systems for polymer characterisation." Thesis, University of Wolverhampton, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.296028.

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Finch, Ian. "Intelligent explanation from expert systems." Thesis, University of Liverpool, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.316575.

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Ajayi-obe, Yomi. "Expert systems in process design." Thesis, University of Strathclyde, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.293247.

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Rudy, Ian Allan. "Expert systems and energy modelling." Thesis, University of Cambridge, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.316819.

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Gamede, Cyril Vuyani. "Boiler maintenance using expert systems." Master's thesis, University of Cape Town, 1989. http://hdl.handle.net/11427/18798.

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This research explores the application of expert systems to the maintenance of boilers, are as follows: and its main objectives [1] To explore the application of expert systems in the maintenance of boilers. [2] To simplify the task of boiler maintenance with the help of expert systems. [3] To improve the skills of boiler maintenance workers through the knowledge 'captured ' or 'preserved' by expert systems. [4] To minimise errors which may cost time, money, effort and possible risk of injury to boiler maintenance personnel. [5] To develop a prototype expert system which can advise and assist boiler maintenance personnel. [6) To contribute to research in the application of expert systems in the field of engineering.

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Obidigbo, Benjamin. "Expert systems for vendor selection." Thesis, Aston University, 1998. http://publications.aston.ac.uk/10708/.

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The survival of organisations, especially SMEs, depends, to the greatest extent, on those who supply them with the required material input. This is because if the supplier fails to deliver the right materials at the right time and place, and at the right price, then the recipient organisation is bound to fail in its obligations to satisfy the needs of its customers, and to stay in business. Hence, the task of choosing a supplier(s) from a list of vendors, that an organisation will trust with its very existence, is not an easy one. This project investigated how purchasing personnel in organisations solve the problem of vendor selection. The investigation went further to ascertain whether an Expert Systems model could be developed and used as a plausible solution to the problem. An extensive literature review indicated that very scanty research has been conducted in the area of Expert Systems for Vendor Selection, whereas many research theories in expert systems and in purchasing and supply management chain, respectively, had been reported. A survey questionnaire was designed and circulated to people in the industries who actually perform the vendor selection tasks. Analysis of the collected data confirmed the various factors which are considered during the selection process, and established the order in which those factors are ranked. Five of the factors, namely, Production Methods Used, Vendors Financial Background, Manufacturing Capacity, Size of Vendor Organisations, and Suppliers Position in the Industry; appeared to have similar patterns in the way organisations ranked them. These patterns suggested that the bigger the organisation, the more importantly they regarded the above factors. Further investigations revealed that respondents agreed that the most important factors were: Product Quality, Product Price and Delivery Date. The most apparent pattern was observed for the Vendors Financial Background. This generated curiosity which led to the design and development of a prototype expert system for assessing the financial profile of a potential supplier(s).

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Booth, Stephen H. "Expert systems for fault analysis." Thesis, Aston University, 1993. http://publications.aston.ac.uk/9802/.

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The initial aim of this research was to investigate the application of expert Systems, or Knowledge Base Systems technology to the automated synthesis of Hazard and Operability Studies. Due to the generic nature of Fault Analysis problems and the way in which Knowledge Base Systems work, this goal has evolved into a consideration of automated support for Fault Analysis in general, covering HAZOP, Fault Tree Analysis, FMEA and Fault Diagnosis in the Process Industries. This thesis described a proposed architecture for such an Expert System. The purpose of the System is to produce a descriptive model of faults and fault propagation from a description of the physical structure of the plant. From these descriptive models, the desired Fault Analysis may be produced. The way in which this is done reflects the complexity of the problem which, in principle, encompasses the whole of the discipline of Process Engineering. An attempt is made to incorporate the perceived method that an expert uses to solve the problem; keywords, heuristics and guidelines from techniques such as HAZOP and Fault Tree Synthesis are used. In a truly Expert System, the performance of the system is strongly dependent on the high quality of the knowledge that is incorporated. This expert knowledge takes the form of heuristics or rules of thumb which are used in problem solving. This research has shown that, for the application of fault analysis heuristics, it is necessary to have a representation of the details of fault propagation within a process. This helps to ensure the robustness of the system - a gradual rather than abrupt degradation at the boundaries of the domain knowledge.

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Wong, King Cheong. "Expert systems for foundation design." Thesis, The University of Sydney, 1990. https://hdl.handle.net/2123/26306.

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Expert system technology has been brought from Artificial Intelligence research laboratories to the real world over the last decade. However, to date, there are few expert systems that have been developed for foundation design work. The problems are due to technical and psychological factors and are similiar to those when computers were firstly introduced. In this thesis, the difficulties of building expert systems for foundation engineering application are identified. The work in this thesis is an attempt to study the applicability of expert systems to foundation design and find solutions to existing difficulties. The thesis explores ways in which geotechnical engineers can be persuaded to accept the technology and develop their own systems, or to use developed systems to assist their work. Features of conventional expert systems are investigated, modified and improved such that the developed systems are more suitable for foundation design work and engineers may have more confidence in developing systems or using the developed systems. Three ways of building expert systems are studied and compared in terms of flexibility, user and developer-friendliness, user-confidence, and validation of the developed system. The three ways involve: i) using Turbo PROLOG to encode the system from ‘scratch’, ii) using a development tool (also termed a shell in this thesis), and iii) using a spreadsheet. A new shell is specifically designed and developed to facilitate the second approach. Examples of systems for geotechnical application using each approach are described in detail in this thesis.

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Cohen, Hertzel. "The audit of expert systems." Thesis, City, University of London, 1995. http://openaccess.city.ac.uk/17983/.

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This study presents the results of an investigation into the methods of auditing Expert Systems. Such systems have already proved to be, and are increasingly becoming, a very powerful tool in many areas such as medicine, geology, finance and banking. They embody unique risks which are not treated by conventional audit methods of operating or developing software. The lack of awareness and information about Expert Systems in general and their auditability in particular are somewhat surprising. The author, in tackling this new area, has developed and proposed two models of auditing Expert Systems: a) the Audit of an Operating Expert System (AOES), b) the Audit of an Expert System under development (AESD). The first model incorporates the" control band" which aims at eliminating the exceptional risks and to allow the internal auditor to treat it as conventional software. The second proposed model is based on "NESDEM'; a normative evaluation model for Expert Systems. The test of the proposed AOES model was conducted in two different organisations: ARJO-WIGGINS APPLETON which developed and still uses an Expert System for its paper mill and the CITY UNIVERSITY DEPARTMENT OF OPTOMETRY AND VISUAL SCIENCE which developed an Expert System for eye tests. Unfortunately the author was unable to test his proposed AESD model under a "live" development process due to lack of cooperation from organisations which the author contacted. Consequently he tested this model by mailing questionnaires to internal/external auditors within the U.K. Given the research performed in this study and subject to the limitations detailed, the proposed models appear reliable, flexible, practical and suitable to the internal auditor in assessing the effectiveness of the internal controls within Expert Systems.

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Senniappan, Arul Prasad. "Baselining a compressed air system an expert systems approach /." Morgantown, W. Va. : [West Virginia University Libraries], 2004. https://etd.wvu.edu/etd/controller.jsp?moduleName=documentdata&jsp%5FetdId=3404.

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Thesis (M.S.)--West Virginia University, 2004.
Title from document title page. Document formatted into pages; contains xiii, 148 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 90-95).

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Olshewsky, Steven J. "Do expert systems impact taxpayer behavior?" Diss., Texas A&M University, 2003. http://hdl.handle.net/1969.1/114.

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Individuals are increasingly using expert system tax programs as a substitute for paid professionals when preparing their income tax returns. This study examines ways that expert systems encourage the same aggressive results documented when paid professionals are used. Examining the use of expert systems and the related behavior of taxpayers reveals aggressive reporting related to the commonly used warning alerts in tax programs. Using an experimental economics setting in which participants report liabilities with the possibility of penalties for noncompliant reporting, participants filled out a Claim Form mimicking a Schedule C in one of four conditions: manual preparation, no alerts, alerts triggered at a high threshold of reporting aggression, and alerts triggered at a low level of reporting aggression. Comparing the amounts deducted in each condition revealed that warning alerts with low thresholds of activation decreased aggressive reporting while warning alerts with high thresholds of activation increased aggressive reporting. Survey instruments measuring user satisfaction indicated significantly lower satisfaction when (high or low level) warning alerts were used versus no warning alerts. Contrary to expectations, respondents using the expert system tax program with high threshold warning alerts compared to no warning alerts reported a significantly higher perception of accuracy. This study demonstrates the extreme to which taxpayers are swayed by perceived aspects of the tax software that are irrelevant to the facts of their tax situations. Exactly what taxpayers need to be given by way of guidance and direction to comport their behavior to the tax laws is a critical question of public policy.

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Alim, Seema. "Fuzzy expert systems in civil engineering." Thesis, Imperial College London, 1985. http://hdl.handle.net/10044/1/7183.

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Lewis, John N. "Expert systems development utilizing heuristic methods." Thesis, Monterey, California. Naval Postgraduate School, 1996. http://hdl.handle.net/10945/8376.

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Approved for public release; distribution is unlimited.
This thesis analyzes the diagnostic domain and isolates the heuristics employed by experts to arrive at diagnostic solutions. These heuristic methods are then generalized in order to arrive at a series of heuristic rules that can be applied to a wide range of diagnostic processes independent of there respective domain. To test the validity of the generalized heuristics, a prototype expert system was created targeting the heuristics employed by avionics repair technicians in repair of the APS- 1 15 radar system on the P-3C Orion.

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Lu, Han-Chung. "Using expert systems in mine warfare." Thesis, Monterey, California. Naval Postgraduate School, 1991. http://hdl.handle.net/10945/30957.

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Historically, sea mines warfare have played an important role in warfare, which a naval officer cannot afford to neglect. During the recent mine campaign in the Middle East involving Iran an Iraq, commanders delayed decisions on whether or not to deploy mine countermeasure (MCM) forces. As a result, damage occurred to ships in a minefield that could have been prevented by the speedy application of MCM. Before the operational mission commenced, there are several uncertain questions in the mind of the commander: Do the mine-fields exist? Which country laid the mines? What type of delivery platform laid the mines? Where are the mines? What kind of mines are they? Do we need to deploy the MCM forces? Previously, these kinds of fuzzy questions were very difficult to answer by a tactical principle. In this thesis, the probabilistic inference network in the expert system environment is used to answer the above questions. The probabilistic inference network method is supported by the certainty factors. Calculations involving quantitative probabilities for answers to the above questions could enable the MCM experts to offer suggestions to the commander for reducing the ship's vulnerability at sea during wartime. Expert Systems, Mine Warfare.

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Curds, Ross Morgan. "Propagation techniques in probabilistic expert systems." Thesis, University College London (University of London), 1997. http://discovery.ucl.ac.uk/1317660/.

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Techniques for the construction of probabilistic expert systems comprising both discrete and continuous random variables are presented. In particular we are concerned with how continuous random variables may be incorporated into an expert system - an area which has previously received relatively little attention. We investigate and extend the numeric techniques of other authors, and develop two new approaches. The first approach makes use of computer algebra. This exact technique enables a probability distribution to be expressed and manipulated in terms of its algebraic formula resulting in no loss of information. Our second approach is an approximate method based upon cubic spline interpolation. We constrain the probability density function of a continuous variable to a finite set of points at which we have both function values and first derivatives. These values may then be held in a potential table and treated in an almost identical fashion to discrete variables. While symbolic techniques are shown to be only appropriate in special cases, cubic spline interpolation, though less accurate, is widely applicable. We combine these techniques to form a hybrid methodology in which discrete variables, symbolic continuous variables, and spline interpolated continuous variables may exist not only in the same junction tree, but also in the same universe. We show how propagation algorithms may be constructed for these various cases and investigate how the means, variances and probability density functions of the marginal distributions in the system may be generated. It is shown how evidence of either a numeric or a symbolic nature may be incorporated into such systems and how simulation studies may be performed. The techniques we develop are implemented in the computer language Mathematica and an outline of how this may be accomplished is presented.

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Carden, Kenneth John. "Explanation in rule-based expert systems." Thesis, Rhodes University, 1988. http://hdl.handle.net/10962/d1002034.

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The ability of an expert system to explain its reasoning is fundamental to the system's credibility. Explanations become even more vital in systems which use methods of uncertainty propagation. The research documented here describes the development of an explanation sub-system which interfaces with the P.R.O. Expert System Toolkit. This toolkit has been used in the development of three small ecological expert systems. This project has involved adapting the results of research in the field of explanation-generation, to the requirements of the ecologist users. The subsystem contains two major components. The first lists the rules that fired during a consultation. The second component comprises routines responsible for quantifying the effects on the system conclusions of the answers given to questions. These latter routines can be used to perform sensitivity analyses on the answers given. The incorporation of such routines in small expert systems is quite unique

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Harris, Daniel J. "Expert systems for fault tree synthesis." Thesis, Aston University, 1990. http://publications.aston.ac.uk/9772/.

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Hazard and operability (HAZOP) studies on chemical process plants are very time consuming, and often tedious, tasks. The requirement for HAZOP studies is that a team of experts systematically analyse every conceivable process deviation, identifying possible causes and any hazards that may result. The systematic nature of the task, and the fact that some team members may be unoccupied for much of the time, can lead to tedium, which in turn may lead to serious errors or omissions. An aid to HAZOP are fault trees, which present the system failure logic graphically such that the study team can readily assimilate their findings. Fault trees are also useful to the identification of design weaknesses, and may additionally be used to estimate the likelihood of hazardous events occurring. The one drawback of fault trees is that they are difficult to generate by hand. This is because of the sheer size and complexity of modern process plants. The work in this thesis proposed a computer-based method to aid the development of fault trees for chemical process plants. The aim is to produce concise, structured fault trees that are easy for analysts to understand. Standard plant input-output equation models for major process units are modified such that they include ancillary units and pipework. This results in a reduction in the nodes required to represent a plant. Control loops and protective systems are modelled as operators which act on process variables. This modelling maintains the functionality of loops, making fault tree generation easier and improving the structure of the fault trees produced. A method, called event ordering, is proposed which allows the magnitude of deviations of controlled or measured variables to be defined in terms of the control loops and protective systems with which they are associated.

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Trimble, John. "Knowledge acquisition and the system dynamics methodology." Diss., Georgia Institute of Technology, 1992. http://hdl.handle.net/1853/23337.

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Jayanty, Suresh. "A Rule Based Expert System Framework for Small Water Systems." TopSCHOLAR®, 2005. http://digitalcommons.wku.edu/theses/502.

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Using an expert system to make decision making more reliable has been well studied and implemented over the years. For effective use, both data-driven questions (forward chaining) and goal-driven questions (backward chaining) need to be supported. Similarly, an avenue to update rules in the system as and when they change without major recompilation should be available. In this thesis we present an expert system framework that can help small water system operators make informed decisions regarding compliance with various EPA rules that may apply to them. To support both types of questions mentioned earlier, the system incorporates two expert system shells: JESS for answering data-driven questions such as "This is my reading for sample X. What needs to happen next?" and MANDARAX for goal-driven questions such as "We want to be compliant with the Total Coliform Rule. What do we need to do?" To make sure that rules are consistent and to support a straightforward rule-updating process, we use a native xml database to store the rules. All the rules are in XML format which ensures better symbiosis with other tools that support XML and allows one set of rules to be used for both JESS and MANDARAX.

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Ahmad, Farooq. "An expert system for computer-aided design of control systems." Thesis, University of Strathclyde, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.357165.

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Koushik, Geetha. "The specifications of an expert system for configuring teleconferencing systems." Master's thesis, This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-10242009-020049/.

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Shenassa, M. Hassan. "Expert tuners for PI control." Thesis, University of Salford, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.327897.

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Bradshaw, John. "The P.R.O. expert system shell." Thesis, Rhodes University, 1987. http://hdl.handle.net/10962/d1006302.

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This thesis reports the research which led to the development of the P.R .O. Expert System Shell. The P.R.O . System is primarily, though not exclusively , designed for use in ecological domains. In the light of two specific expert systems, The RCS (River Conservation Status) and the Aquaculture Systems, which were developed as part of this research, a number of areas of importance have been identified. The most significant of these is the need to handle uncertainty effectively. The style of knowledge representation to be implemented also plays an important role. After consulting the relevant literature and the available microcomputer expert system shells, a number of ideas have been included in the P.R.O. System. The P.R.O . System is a backward chaining, production system based expert system shell. It embodies a simple but effective method of handling uncertainty. An important feature of this method is that it takes cognizance of the different relative importances of the conditions which need to be satisfied before a conclusion can be reached. The knowledge base consists of more than rules and questions. It also contains meta-knowledge, which is used by the inference engine. The P.R.O. System has been designed to be of practical use. Its strongest recommendations are therefore, that the two non-trivial systems which have been implemented in it, have been accepted by the experts and their peers as systems which produce good, accurate answers .
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Buck, Arlene J. "Automated knowledge acquisition tool for identification of generic tasks /." Online version of thesis, 1990. http://hdl.handle.net/1850/10577.

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Enoch, Lawrence M. (Lawrence Mark). "Librarians' attitudes toward computers, desktop publishing systems and expert systems." Thesis, University of North Texas, 1992. https://digital.library.unt.edu/ark:/67531/metadc332747/.

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In this study a Q-sort was used to measure differences in academic and public librarian attitudes toward computers, desktop publishing systems and expert systems. Fifty-two academic and sixty-two public librarians responded. The responses were sorted into groups based on the type of library and whether or not the respondent followed the stated Q-sort distribution.

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Lankhorst, Debra A. "Using expert systems to conduct vulnerability assessments." Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1996. http://handle.dtic.mil/100.2/ADA319367.

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Thesis (M.S. in Information Technology Management) Naval Postgraduate School, September 1996.
Thesis advisor(s): Carl R. Jones,Vicente C. Garcia. "September 1996." Includes bibliographical references (p. 95-100). Also Available online.

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Colby, Lisa J. "Some roles for expert systems in planning." Thesis, University of British Columbia, 1990. http://hdl.handle.net/2429/29925.

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This thesis explores whether computer-based expert systems can be used in planning and, if so, under what circumstances. Expert systems are computer-based programs that solve problems in a way that mimics the human reasoning process. Expert system reasoning relies upon logic and rules-of-thumb rather than the numerical and mathematical algorithms of most other computer programs. Planning has been interpreted in the professional context of urban and regional planning, rather than the cross-disciplinary fiscal or project management planning often implied in computer literature. To determine expert systems could be useful to planners, the reasons for incompatibility between the nature of planning and conventional computers models of the past are explored. Advantages and disadvantages of expert systems are considered. Expert systems represent substantial improvement in areas where conventional programs are inadequate. Chapters 2 to 5 form the theoretical base of the thesis. Chapter 2 explains the fundamentals of expert system reasoning and how it differs from other computer software. Chapter 3 outlines reasons why this technology might appeal to planners. Chapter 4 introduces some of the disadvantages of expert systems, including technical limitations, ethical and legal issues. Chapter 5 introduces general guidelines to help the reader understand what type of planning tasks might benefit from the use of this new tool. Chapters 6 to 8 consider issues raised in the preceding chapters. Three Canadian systems now at the forefront of expert systems applications to planning are reviewed in chapters 6, 7 and 8 Respectively. The first application, HERMES, is an emergency planning application. It advises emergency response personnel during crises involving hazardous materials. SCREENER is an environmental planning application. It assists environmental officers at Transport Canada to assess simple capital projects for environmental impact statements and screen out more complicated ones for further review. The third application used for illustrative purposes, PLANCHECKER, is a municipal planning example. The system assists plan checkers at City Hall in assessing building plans. The three case-studies satisfy the task suitability guidelines quite well and appear to be successful applications of expert systems to planning. It is still too early to draw definite conclusions, but it is likely the technology will prove useful to planners. Planners should be prepared understand both the potential and limitations of expert systems so they can use the technology wisely.
Applied Science, Faculty of
Community and Regional Planning (SCARP), School of
Graduate

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38

Wang, Jinchang. "Rule-based expert systems and discrete optimization." Diss., Georgia Institute of Technology, 1990. http://hdl.handle.net/1853/29358.

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Susskind, Richard Eric. "Expert systems in law : a jurisprudential enquiry." Thesis, University of Oxford, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.328926.

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Schwarz, Frederick J. "Strategic planning for DFAS-Cleveland expert systems." Thesis, Monterey, California. Naval Postgraduate School, 1991. http://hdl.handle.net/10945/26791.

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Blackwell, Grahame Kenneth. "An expert systems approach to collision avoidance." Thesis, University of Plymouth, 1992. http://hdl.handle.net/10026.1/1773.

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HaKong, L. "Expert systems techniques for statistical data analysis." Thesis, London South Bank University, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.381956.

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Bottaci, L. "The modifiability of rule-based expert systems." Thesis, Brunel University, 1985. http://bura.brunel.ac.uk/handle/2438/5789.

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This thesis examines the claim that rule representations of knowledge are conveniently modified. The thesis falls into two parts and in the first, a precise notion of a convenient modification, called an extension, is developed and it is shown that extensible knowledge-bases are very convenient to modify and develop. We show that- rule representations of knowledge are extensible only if they incorporate a suitable organisation of knowledge. Furthermore, we show that non-rule representations with a suitable organisation of knowledge are also extensible. We therefore conclude that rule representations of knowledge are no more or less extensible than non-rule representations. In the second part, we consider the more pragmatic aspects of knowledge-base modifiability. In each of two detailed case studies, we compare the modifiability of a rule-based expert system with its "second generation” counterpart which incorporates non-rule representations of knowledge. We conclude that in practice the modifiability of extensible knowledge-bases can be compromised if the organisation of knowledge is represented obscurely. Above all, the thesis emphasizes the importance of the organisation of knowledge in an expert system.

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Flynn, Damian Gerard. "Expert self-tuning control for turbogenerator systems." Thesis, Queen's University Belfast, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.241393.

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Pollitt, A. S. "An expert systems approach to document retrieval." Thesis, University of Huddersfield, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.372852.

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Vefghi, Lotfollah. "Expert neural network systems in clinical anaesthesia." Thesis, University of Sheffield, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.267120.

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Pau, Alexandra Y. "An automated verfication tool for expert systems." Thesis, Massachusetts Institute of Technology, 1996. http://hdl.handle.net/1721.1/40219.

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Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1996.
Includes bibliographical references (leaf 47).
by Alexandra Y. Pau.
M.Eng.

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Hite, Lee Anne. "Designing a testing strategy for expert systems." Thesis, Virginia Tech, 1988. http://hdl.handle.net/10919/45156.

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Testinq proqrams with tractable alqorithms is one area in which software enqineers have made numerous advances over the past few decades. Testinq rule-based expert systems, however, is a new area in software enqineerinq which requires new testinq techniques.

For the most part, traditional software enqineerinq testinq strateqies assume modular proqram development. This assumption is impractical to make for expert system development, for the knowledqe base of an expert system is quite simply a huqe non-modular proqram. It consists almost entirely of non-ordered, multi-branchinq decision statements. In traditional proqramminq, the module interfaces are limited and well defined. For rule-based expert systems, the interaction among rules is combinatoric and highly data-driven. Thus, the testing of a completed expert system via traditional path analysis is impractical.

The design of a testing strategy for expert systems focuses on the generic phases of expert system development. Briefly, these phases include system definition, incremental system implementation, and system maintenance.. Using this simplified breakdown of the expert system development process as a guide, certain testing techniques can be generalized enough to work for any expert system application.
Master of Science

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Kulkarni, Nitin Y. "Application of expert systems in landscape architecture." Thesis, Virginia Tech, 1989. http://hdl.handle.net/10919/43899.

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Application of artificial intelligence (Al) has been a topic of interest among researchers for the past decade or more. Years of research in the commercial application of Al, availability of hardware support for Al application and affordability of software and hardware has generated a lot of interest in this field and brought this technology within the reach of micro-computer based users. The commercial impact of AI is due to expert systems (ESs). ES technology is a collection of methods and techniques for constructing human-machine systems with specialized problem solving expertise.

This project explores the application of ESs in landscape architecture by developing a prototype ES and testing implications of its use with designers while working on a hypothetical problem in a studio environment. The development process helps identify the typical difficulties of such an application, to uncover technical problems, and to identify areas needing further research.

The project aims at building an ES that provides very limited preliminary data and design guidelines to initialize the design process and keeps track of the most fundamental issues necessary for planning, thus acting as an expert and assistant simultaneously. The idea is to explore the possibility of applying ESs to facilitate the design process so that designers may concentrate on other important aspects of design which include intuitive judgement about qualitative aspects.

Master of Landscape Architecture

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Felmban, Samir M. N. "Expert systems in the design of auditoria." Thesis, University of Liverpool, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.400199.

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Dissertations / Theses on the topic 'Expert systems'

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