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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
211

An object-oriented knowledge-based systems approach to construction project control

Wirba, Elias Njoka January 1996 (has links)
No description available.
212

A methodology for the selection of overall strategic performance measures for manufacturing business

Salleh, Azhari bin Md January 1995 (has links)
This research has identified the performance measures congruent with each model during a business life cycle. Questionnaire surveys have also been carried out to complement and validate the theoretical models. The results of the survey generally confirm the expected measures derived from the theoretical models. The learning process for these newer industrial business organisations can be greatly reduced if the expertise and experience of the established manufacturing business organisations is made readily available. This is the motivation for this research and the methodology which has been developed. The research also proposes use of a knowledge based expert decision support system to encapsulate the methodology, and the wealth of expert knowledge in the domain of performance measures. A prototype knowledge based expert decision support system has been developed to test the concept. It is hoped that this research has achieved its aim to provide a new contribution in the manufacturing business organisation strategy domain and to the improvement of managerial productivity and effectiveness through better use of performance measures.
213

A Real Time Expert Control System for Helicopter Autorotation

Sunberg, Zachary Nolan 03 October 2013 (has links)
Autorotation maneuvers are required to perform a safe landing of a helicopter in cases of engine loss in a single engine vehicle and transmission or tail rotor malfunction. The rise of autonomous helicopter technology, and the pilot skill required to manually perform an autorotation, motivate the need for new autonomous autorotation control laws. Previous approaches to automatic control for this maneuver have relied on control law optimization based on a high-fidelity model of the helicopter, or have attempted to match recorded trajectories flown by an expert human pilot. In this paper, a new expert control system is proposed. The term “expert control system” is used because the system is intended to mimic the actions that a human pilot might take, does not require any iterative learning, model prediction, or optimization at runtime, and is based on an inference system that involves fuzzy logic, PID, and other conventional control techniques. The multi-stage control law drives the helicopter to a near-optimal steady-state descent and uses an estimate of the time to impact to safely flare and land the helicopter in the vast majority of flight conditions. The control law is validated using a full 6-degree-of-freedom simulation of both a full-size attack helicopter and a small hobby-class helicopter. The pro- posed control design is highly flexible and may be used to perform fully autonomous autorotation or to provide guidance to pilots during manual autorotation maneuvers.
214

The right tool at the right time : investigation of freehand drawing as an interface to knowledge based design tools

Do, Ellen Yi-Luen 08 1900 (has links)
No description available.
215

Intelligent support for doctor-patient partnership in the context of diabetes /

Ma, Chunlan. Unknown Date (has links)
Doctor-patient partnership has been advocated for achieving effective diabetes management. Such a partnership requires empowering patients with proper knowledge and skills so they are capable of participating in decision-making, effective communication with health professionals and successful diabetes self-management. Although it is well known that patient education should be tailored and prioritised, little research on Computer-based Patient Education Systems (CPESs) has aimed at customising information that is flexible enough to adapt to firstly, the dynamic nature of patients' ongoing information needs and secondly, changes in their personal health and social circumstances. Moreover, except for indirect support for doctor-patient communication through tailored information, current CPESs do not aid patients in formulating their questions. / This thesis targets limitations of current CPESs and explores approaches for using information technology (IT) to support the doctor-patient partnership. Two approaches used to achieve the research goal are 1) providing essential information to individual patients - information that is not only relevant, but also prioritised; and 2) providing direct support for patients to generate personalised agendas prior to scheduled health visits. The innovative technologies that have been developed for implementing these two approaches include a comprehensive Diabetes Information Profile (DIP) for each patient, information tailoring and prioritisation algorithms (information algorithms), quiz tailoring and prioritisation algorithms (quiz algorithms), and agenda personalisation algorithms (which serve to populate an agenda question pool). The DIP includes data elements on a patient's lifestyle, diet profile, psychosocial profile, risk factors of diabetic complications, behaviour change profile, self-management profile, and clinical status. The information algorithms take into account these DIP elements, as well as patients' diabetes knowledge level (based on educational exposure) and individual information preferences. Collectively, the implementation of these approaches, using an extensible architecture based on Extensible Mark-up Language (XML) and Java technologies, is called “Violet Technology” (VT). A VT-based web portal has been developed and evaluated. / A two-phase evaluation was conducted through the Diabetes Centre of a metropolitan hospital. The first study evaluates the validity of the information algorithms through patient and healthcare provider assessment of prioritised information topics. The participants of the first study include 11 patients with diabetes, one General Practician (GP), one endocrinologist, two diabetes nurse educators and one dietician. The second trial evaluates the VT-based portal overall - including information, quiz and agenda personalisation algorithms - through a field trial of the portal with random selection of patients to treatment and control groups. In total, 27 patients, one GP, one endocrinologist, two nurse educators, and one dietician were involved in the second trial. The evaluations provide qualitative support for the relevance of information prioritisation by VT, and show acceptable consumer usability, as well as healthcare provider support, for the portal. The evaluations also revealed further incremental refinements to the information algorithms. / This thesis contributes a specific framework for the use of IT to support the doctor-patient partnership through prioritised information and integrated agenda formulation services. While a larger scale of evaluation is needed to establish patient health benefits, the results of the two initial studies are encouraging. This framework could be adapted for other chronic diseases, such as depression or asthma. It could also be used for other purposes, such as an intelligent information searching facility. A future VT framework should provide more explicit representation of patients' emotional supports and have further mechanisms for promoting patient behaviour changes. / Thesis (PhDInformationTechnology)--University of South Australia, 2005.
216

Expert systems applied to in-process machine health monitoring and process control /

Kashef, Kaveh. Unknown Date (has links)
Thesis (MEng in Electronic Engineering (Research)) -- University of South Australia, 1995
217

Learning and discovery in incremental knowledge acquisition

Suryanto, Hendra, Computer Science & Engineering, Faculty of Engineering, UNSW January 2005 (has links)
Knowledge Based Systems (KBS) have been actively investigated since the early period of AI. There are four common methods of building expert systems: modeling approaches, programming approaches, case-based approaches and machine-learning approaches. One particular technique is Ripple Down Rules (RDR) which may be classified as an incremental case-based approach. Knowledge needs to be acquired from experts in the context of individual cases viewed by them. In the RDR framework, the expert adds a new rule based on the context of an individual case. This task is simple and only affects the expert???s workflow minimally. The rule added fixes an incorrect interpretation made by the KBS but with minimal impact on the KBS's previous correct performance. This provides incremental improvement. Despite these strengths of RDR, there are some limitations including rule redundancy, lack of intermediate features and lack of models. This thesis addresses these RDR limitations by applying automatic learning algorithms to reorganize the knowledge base, to learn intermediate features and possibly to discover domain models. The redundancy problem occurs because rules created in particular contexts which should have more general application. We address this limitation by reorganizing the knowledge base and removing redundant rules. Removal of redundant rules should also reduce the number of future knowledge acquisition sessions. Intermediate features improve modularity, because the expert can deal with features in groups rather than individually. In addition to the manual creation of intermediate features for RDR, we propose the automated discovery of intermediate features to speed up the knowledge acquisition process by generalizing existing rules. Finally, the Ripple Down Rules approach facilitates rapid knowledge acquisition as it can be initialized with a minimal ontology. Despite minimal modeling, we propose that a more developed knowledge model can be extracted from an existing RDR KBS. This may be useful in using RDR KBS for other applications. The most useful of these three developments was the automated discovery of intermediate features. This made a significant difference to the number of knowledge acquisition sessions required.
218

Knowledge extraction and the modelling of expertise in a diagnostic task /

Lundell, James. January 1988 (has links)
Thesis (Ph. D.)--University of Washington, 1988. / Vita. Includes bibliographical references.
219

The design of an expert system to aid in the selection of a wood fired boiler system

Morris, Melissa L. January 1900 (has links)
Thesis (M.S.)--West Virginia University, 2008. / Title from document title page. Document formatted into pages; contains xiii, 151 p. : ill. (some col.), col. maps. Includes abstract. Includes bibliographical references (p. 104-107).
220

The integration of expert systems into energy management system centers using a dispatcher training simulator /

Chen, Ming. January 1989 (has links)
Thesis (Ph. D.)--University of Washington, 1989. / Vita. Includes bibliographical references (leaves [107]-110).

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