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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.
61

An academic advisory system : integrating an academic database management system, an expert system, and a case-based reasoning system /

Santosa, Purnomo Budi. January 2005 (has links) (PDF)
Thesis (Ph.D.) - University of Queensland, 2005. / Includes bibliography.
62

Study on application possibilities of Case-Based Reasoning on the domain of scheduling problems / Etude de l'application du raisonnement à partir de cas pour des problèmes d'ordonnancement

Kocsis, Tibor 12 December 2011 (has links)
Ces travaux concernent la mise en place d'un système d'aide à la décision, s'appuyant sur le raisonnement à partir de cas, pour la modélisation et la résolution des problèmes d'ordonnancement en génie des procédés. Une analyse de co-citation a été exécutée afin d'extraire de la littérature la connaissance nécessaire à la construction de la stratégie d'aide à la décision et d'obtenir une image de la situation, de l'évolution et de l'intensité de la recherche du domaine des problèmes d'ordonnancement. Un système de classification a été proposée, et la nomenclature proposée par Blazewicz et al. (2007) a été étendue de manière à pouvoir caractériser de manière complète les problèmes d'ordonnancement et leur mode de résolution. Les difficultés d'adaptation du modèle ont été discutées, et l'efficacité des quatre modèles de littérature a été comparée sur trois exemples de flow-shop. Une stratégie de résolution est proposée en fonction des caractéristiques du problème mathématique. / The purpose of this study is to work out the foundations of a decision-support system in order to advise efficient resolution strategies for scheduling problems in process engineering. This decision-support system is based on Case-Based Reasoning. A bibliographic study based on co-citation analysis has been performed in order to extract knowledge from the literature and obtain a landscape about scheduling research, its intensity and evolution. An open classification scheme has been proposed to scheduling problems, mathematical models and solving methods. A notation scheme corresponding to the classification has been elaborated based on the nomenclature proposed by Blazewicz et al. (2007). The difficulties arising during the adaptation of a mathematical model to different problems is discussed, and the performances of four literature mathematical models have been compared on three flow-shop examples. A resolution strategy is proposed based on the characteristics of the scheduling problem.
63

Uso da metodologia de raciocínio baseado em casos na investigação de irregularidades nas internações hospitalares / Using case-based reasoning to search problems in hospital admission authorization

Lorenzi, Fabiana January 1998 (has links)
Raciocínio Baseado em Casos (RBC) a uma técnica de Inteligência Artificial para representação de conhecimento e inferência, que propõe a solução de novos problemas adaptando soluções que foram usadas para resolver problemas anteriores. A descrição de problemas existentes, conhecida como casos, é utilizada para sugerir um meio de resolver um novo problema, avisar o usuário de possíveis falhas observadas no passado e para interpretar a situação atual. Esta dissertação tem por objetivos apresentar um estudo sobre o use de RBC, aplicado ao desenvolvimento de um sistema de administração hospitalar. A aplicação escolhida é o controle e avaliação de Autorizações de Interações Hospitalares (AIH's). Atualmente, este controle é realizado manualmente pela Secretaria da Saúde Municipal de Porto Alegre, que tem um prazo de 48 horas para avaliar o faturamento de cada hospital e apontar as irregularidades. Isso é um problema, pois o volume do faturamento é grande para um prazo tão curto e muitas vezes as AIH's com irregularidades podem passar desapercebidas. O sistema considerado deve realizar o controle e avaliação de AIH's dos hospitais de Porto Alegre, e deve ser capaz de detectar irregularidades nãotriviais na cobrança das internações realizadas pelos hospitais conveniados do Sistema Único de Saúde (SUS). O estudo realizado considerou as etapas de aplicação da metodologia de RBC, tais como, a seleção de uma base de casos pré-existente, a aquisição de conhecimento para compreensão do processo de solução de problemas, a escolha da melhor estratégia de indexação de casos e a escolha do algoritmo de recuperação de casos. As etapas foram aplicadas cuidadosamente no desenvolvimento do protótipo dos métodos de controle de internações hospitalares realizadas pelo SUS e detalhadas para melhor compreensão de cada etapa. O texto ainda descreve a implementação do protótipo. Urna vantagem importante deste trabalho é que ele está vinculado ao projeto de Sistemas de Informação Distribuídos e Inteligentes — SIDI, que trata de Tecnologia de Modelagem, Projeto e Desenvolvimento de Sistemas de Bancos de Dados Distribuídos e Inteligente, no qual todo o estudo esta vinculado ao desenvolvimento de um grande sistema de informação inteligente e distribuído para controle de prontuários médicos de pacientes do Sistema Único de Saúde a nível de Municípios, para emissão de alertas e apoio a tomada de decisões na área de Saúde Pública também a nível de Municípios, e ainda para colocar a disposição da comunidade medica e administrativa abrangida pelo sistema um conjunto de documentos eletrônicos, com informações interessantes ou de referencia. Além de proporcionar uma revisão bibliográfica sobre sistemas de RBC e os vários sistemas já desenvolvidos, este trabalho mostra o desenvolvimento de um sistema de RBC para uma aplicação na área da saúde, detalhando cada uma de suas etapas e sua implementação, comparando as técnicas utilizadas em seu desenvolvimento com técnicas utilizadas em outros sistemas de RBC. / Case-based Reasoning (CBR) is an Artificial Intelligence (AI) technique for knowledge representation and inference that proposes the solution of new problems adapting old solutions used to solve previous problems. The problem description, cases, is used to suggest a way to solve a problem, get users attention to past failures current situation. The application which was chosen is the control and evaluation of Hospital Admission Authorization (AIH's). Actually, this control has been done by the Heath Bureau of Porto Alegre in 48 hours. They evaluate and point irregularities in the AIH's. That is a problem because the number of AIH's is large and the time is light and some of them can go uncovered. The present study must control and evaluate Porto Alegre AIH's and must be able to detect non trivial irregularities in hospital in admissions by the Health Unique System (SUS). The accomplished study considered the CBR methodology application stages, such as selection of a existent case base, the knowlegde acquisition process to understand the solution process, the case representation, choice of the best indexing scheme and the recovery algorithm. The stages were carefully applied in the control methods prototype development of hospital admissions by the SUS. The text describes yet the prototype implementation. An important advantage of this work is that it is related to the SIDI (Inteligent and Distributed Information System) project. This project focuses on the Modelling, Project and Development of a Distributed and Intelligent Database System, in which the work being done aims at the development of a great information system to control dossier of pacients, to emit alerts, to help municipals district in decision support, and to give doctors the chance to have important eletronic documents to search. Besides presenting a survey about CBR systems and previous systems developed, this work shows the development of a CBR system to medical computer science, presenting each stage of the system and its implementation, comparing the techniques used here with those used in the others systems.
64

Uso da metodologia de raciocínio baseado em casos na investigação de irregularidades nas internações hospitalares / Using case-based reasoning to search problems in hospital admission authorization

Lorenzi, Fabiana January 1998 (has links)
Raciocínio Baseado em Casos (RBC) a uma técnica de Inteligência Artificial para representação de conhecimento e inferência, que propõe a solução de novos problemas adaptando soluções que foram usadas para resolver problemas anteriores. A descrição de problemas existentes, conhecida como casos, é utilizada para sugerir um meio de resolver um novo problema, avisar o usuário de possíveis falhas observadas no passado e para interpretar a situação atual. Esta dissertação tem por objetivos apresentar um estudo sobre o use de RBC, aplicado ao desenvolvimento de um sistema de administração hospitalar. A aplicação escolhida é o controle e avaliação de Autorizações de Interações Hospitalares (AIH's). Atualmente, este controle é realizado manualmente pela Secretaria da Saúde Municipal de Porto Alegre, que tem um prazo de 48 horas para avaliar o faturamento de cada hospital e apontar as irregularidades. Isso é um problema, pois o volume do faturamento é grande para um prazo tão curto e muitas vezes as AIH's com irregularidades podem passar desapercebidas. O sistema considerado deve realizar o controle e avaliação de AIH's dos hospitais de Porto Alegre, e deve ser capaz de detectar irregularidades nãotriviais na cobrança das internações realizadas pelos hospitais conveniados do Sistema Único de Saúde (SUS). O estudo realizado considerou as etapas de aplicação da metodologia de RBC, tais como, a seleção de uma base de casos pré-existente, a aquisição de conhecimento para compreensão do processo de solução de problemas, a escolha da melhor estratégia de indexação de casos e a escolha do algoritmo de recuperação de casos. As etapas foram aplicadas cuidadosamente no desenvolvimento do protótipo dos métodos de controle de internações hospitalares realizadas pelo SUS e detalhadas para melhor compreensão de cada etapa. O texto ainda descreve a implementação do protótipo. Urna vantagem importante deste trabalho é que ele está vinculado ao projeto de Sistemas de Informação Distribuídos e Inteligentes — SIDI, que trata de Tecnologia de Modelagem, Projeto e Desenvolvimento de Sistemas de Bancos de Dados Distribuídos e Inteligente, no qual todo o estudo esta vinculado ao desenvolvimento de um grande sistema de informação inteligente e distribuído para controle de prontuários médicos de pacientes do Sistema Único de Saúde a nível de Municípios, para emissão de alertas e apoio a tomada de decisões na área de Saúde Pública também a nível de Municípios, e ainda para colocar a disposição da comunidade medica e administrativa abrangida pelo sistema um conjunto de documentos eletrônicos, com informações interessantes ou de referencia. Além de proporcionar uma revisão bibliográfica sobre sistemas de RBC e os vários sistemas já desenvolvidos, este trabalho mostra o desenvolvimento de um sistema de RBC para uma aplicação na área da saúde, detalhando cada uma de suas etapas e sua implementação, comparando as técnicas utilizadas em seu desenvolvimento com técnicas utilizadas em outros sistemas de RBC. / Case-based Reasoning (CBR) is an Artificial Intelligence (AI) technique for knowledge representation and inference that proposes the solution of new problems adapting old solutions used to solve previous problems. The problem description, cases, is used to suggest a way to solve a problem, get users attention to past failures current situation. The application which was chosen is the control and evaluation of Hospital Admission Authorization (AIH's). Actually, this control has been done by the Heath Bureau of Porto Alegre in 48 hours. They evaluate and point irregularities in the AIH's. That is a problem because the number of AIH's is large and the time is light and some of them can go uncovered. The present study must control and evaluate Porto Alegre AIH's and must be able to detect non trivial irregularities in hospital in admissions by the Health Unique System (SUS). The accomplished study considered the CBR methodology application stages, such as selection of a existent case base, the knowlegde acquisition process to understand the solution process, the case representation, choice of the best indexing scheme and the recovery algorithm. The stages were carefully applied in the control methods prototype development of hospital admissions by the SUS. The text describes yet the prototype implementation. An important advantage of this work is that it is related to the SIDI (Inteligent and Distributed Information System) project. This project focuses on the Modelling, Project and Development of a Distributed and Intelligent Database System, in which the work being done aims at the development of a great information system to control dossier of pacients, to emit alerts, to help municipals district in decision support, and to give doctors the chance to have important eletronic documents to search. Besides presenting a survey about CBR systems and previous systems developed, this work shows the development of a CBR system to medical computer science, presenting each stage of the system and its implementation, comparing the techniques used here with those used in the others systems.
65

Uso da metodologia de raciocínio baseado em casos na investigação de irregularidades nas internações hospitalares / Using case-based reasoning to search problems in hospital admission authorization

Lorenzi, Fabiana January 1998 (has links)
Raciocínio Baseado em Casos (RBC) a uma técnica de Inteligência Artificial para representação de conhecimento e inferência, que propõe a solução de novos problemas adaptando soluções que foram usadas para resolver problemas anteriores. A descrição de problemas existentes, conhecida como casos, é utilizada para sugerir um meio de resolver um novo problema, avisar o usuário de possíveis falhas observadas no passado e para interpretar a situação atual. Esta dissertação tem por objetivos apresentar um estudo sobre o use de RBC, aplicado ao desenvolvimento de um sistema de administração hospitalar. A aplicação escolhida é o controle e avaliação de Autorizações de Interações Hospitalares (AIH's). Atualmente, este controle é realizado manualmente pela Secretaria da Saúde Municipal de Porto Alegre, que tem um prazo de 48 horas para avaliar o faturamento de cada hospital e apontar as irregularidades. Isso é um problema, pois o volume do faturamento é grande para um prazo tão curto e muitas vezes as AIH's com irregularidades podem passar desapercebidas. O sistema considerado deve realizar o controle e avaliação de AIH's dos hospitais de Porto Alegre, e deve ser capaz de detectar irregularidades nãotriviais na cobrança das internações realizadas pelos hospitais conveniados do Sistema Único de Saúde (SUS). O estudo realizado considerou as etapas de aplicação da metodologia de RBC, tais como, a seleção de uma base de casos pré-existente, a aquisição de conhecimento para compreensão do processo de solução de problemas, a escolha da melhor estratégia de indexação de casos e a escolha do algoritmo de recuperação de casos. As etapas foram aplicadas cuidadosamente no desenvolvimento do protótipo dos métodos de controle de internações hospitalares realizadas pelo SUS e detalhadas para melhor compreensão de cada etapa. O texto ainda descreve a implementação do protótipo. Urna vantagem importante deste trabalho é que ele está vinculado ao projeto de Sistemas de Informação Distribuídos e Inteligentes — SIDI, que trata de Tecnologia de Modelagem, Projeto e Desenvolvimento de Sistemas de Bancos de Dados Distribuídos e Inteligente, no qual todo o estudo esta vinculado ao desenvolvimento de um grande sistema de informação inteligente e distribuído para controle de prontuários médicos de pacientes do Sistema Único de Saúde a nível de Municípios, para emissão de alertas e apoio a tomada de decisões na área de Saúde Pública também a nível de Municípios, e ainda para colocar a disposição da comunidade medica e administrativa abrangida pelo sistema um conjunto de documentos eletrônicos, com informações interessantes ou de referencia. Além de proporcionar uma revisão bibliográfica sobre sistemas de RBC e os vários sistemas já desenvolvidos, este trabalho mostra o desenvolvimento de um sistema de RBC para uma aplicação na área da saúde, detalhando cada uma de suas etapas e sua implementação, comparando as técnicas utilizadas em seu desenvolvimento com técnicas utilizadas em outros sistemas de RBC. / Case-based Reasoning (CBR) is an Artificial Intelligence (AI) technique for knowledge representation and inference that proposes the solution of new problems adapting old solutions used to solve previous problems. The problem description, cases, is used to suggest a way to solve a problem, get users attention to past failures current situation. The application which was chosen is the control and evaluation of Hospital Admission Authorization (AIH's). Actually, this control has been done by the Heath Bureau of Porto Alegre in 48 hours. They evaluate and point irregularities in the AIH's. That is a problem because the number of AIH's is large and the time is light and some of them can go uncovered. The present study must control and evaluate Porto Alegre AIH's and must be able to detect non trivial irregularities in hospital in admissions by the Health Unique System (SUS). The accomplished study considered the CBR methodology application stages, such as selection of a existent case base, the knowlegde acquisition process to understand the solution process, the case representation, choice of the best indexing scheme and the recovery algorithm. The stages were carefully applied in the control methods prototype development of hospital admissions by the SUS. The text describes yet the prototype implementation. An important advantage of this work is that it is related to the SIDI (Inteligent and Distributed Information System) project. This project focuses on the Modelling, Project and Development of a Distributed and Intelligent Database System, in which the work being done aims at the development of a great information system to control dossier of pacients, to emit alerts, to help municipals district in decision support, and to give doctors the chance to have important eletronic documents to search. Besides presenting a survey about CBR systems and previous systems developed, this work shows the development of a CBR system to medical computer science, presenting each stage of the system and its implementation, comparing the techniques used here with those used in the others systems.
66

Autonomous interface agents for assessing computer programs utilizing the Microsoft Windows 32-bit application programming interface.

Joubert, Gideon Francois 02 June 2008 (has links)
In order for an agent to be considered both an interface agent and autonomous, it follows that there must be some part of the interface that the agent must operate in an autonomous fashion. The user must be able to directly observe autonomous actions of the agent and the agent must be able to observe actions taken autonomously by the user in the interface The ability of a software agent to operate the same interface operated by the human user, and the ability of a software agent to act independently of, and concurrently with, the human user will become increasingly important characteristics of human-computer interaction. Agents will observe what human users do when they interact with interfaces, and provide assistance by manipulating the interface themselves, while the user is thinking or performing other operations. Increasingly, applications will be designed to be operated simultaneously by users and their agents [1]. This study is motivated by the need to solve a problem of human resource optimization in the first year informatics practical course as presented by the R.A.U. Standard Bank Academy for Information Technology. The major aim being the development of a prototype system capable of automatically grading first year Microsoft Visual Basic.Net applications. The prototype system will ultimately render assistants obsolete in the grading process and free the assistants to help students with problems related to the informatics course. Developing the envisaged prototype requires much preliminary reading on artificial intelligence and its applications, more specifically autonomous interface agent architecture. Case-based reasoning and machine learning has been identified as having great potential and applicability in the development and implementation of the envisaged prototype and for this reason these topics will provide a foundation on which to build this dissertation. / Ehlers, E.M., Prof.
67

An investigation of feature weighting algorithms and validation techniques using blind analysis for analogy-based estimation

Sigweni, Boyce B. January 2016 (has links)
Context: Software effort estimation is a very important component of the software development life cycle. It underpins activities such as planning, maintenance and bidding. Therefore, it has triggered much research over the past four decades, including many machine learning approaches. One popular approach, that has the benefit of accessible reasoning, is analogy-based estimation. Machine learning including analogy is known to significantly benefit from feature selection/weighting. Unfortunately feature weighting search is an NP hard problem, therefore computationally very demanding, if not intractable. Objective: Therefore, one objective of this research is to develop an effi cient and effective feature weighting algorithm for estimation by analogy. However, a major challenge for the effort estimation research community is that experimental results tend to be contradictory and also lack reliability. This has been paralleled by a recent awareness of how bias can impact research results. This is a contributory reason why software effort estimation is still an open problem. Consequently the second objective is to investigate research methods that might lead to more reliable results and focus on blinding methods to reduce researcher bias. Method: In order to build on the most promising feature weighting algorithms I conduct a systematic literature review. From this I develop a novel and e fficient feature weighting algorithm. This is experimentally evaluated, comparing three feature weighting approaches with a na ive benchmark using 2 industrial data sets. Using these experiments, I explore blind analysis as a technique to reduce bias. Results: The systematic literature review conducted identified 19 relevant primary studies. Results from the meta-analysis of selected studies using a one-sample sign test (p = 0.0003) shows a positive effect - to feature weighting in general compared with ordinary analogy-based estimation (ABE), that is, feature weighting is a worthwhile technique to improve ABE. Nevertheless the results remain imperfect so there is still much scope for improvement. My experience shows that blinding can be a relatively straightforward procedure. I also highlight various statistical analysis decisions which ought not be guided by the hunt for statistical significance and show that results can be inverted merely through a seemingly inconsequential statistical nicety. After analysing results from 483 software projects from two separate industrial data sets, I conclude that the proposed technique improves accuracy over the standard feature subset selection (FSS) and traditional case-based reasoning (CBR) when using pseudo time-series validation. Interestingly, there is no strong evidence for superior performance of the new technique when traditional validation techniques (jackknifing) are used but is more effi cient. Conclusion: There are two main findings: (i) Feature weighting techniques are promising for software effort estimation but they need to be tailored for target case for their potential to be adequately exploited. Despite the research findings showing that assuming weights differ in different parts of the instance space ('local' regions) may improve effort estimation results - majority of studies in software effort estimation (SEE) do not take this into consideration. This represents an improvement on other methods that do not take this into consideration. (ii) Whilst there are minor challenges and some limits to the degree of blinding possible, blind analysis is a very practical and an easy-to-implement method that supports more objective analysis of experimental results. Therefore I argue that blind analysis should be the norm for analysing software engineering experiments.
68

Multi-sensor Information Fusion for Classification of Driver's Physiological Sensor Data

Barua, Shaibal January 2013 (has links)
Physiological sensor signals analysis is common practice in medical domain for diagnosis andclassification of various physiological conditions. Clinicians’ frequently use physiologicalsensor signals to diagnose individual’s psychophysiological parameters i.e., stress tiredness,and fatigue etc. However, parameters obtained from physiological sensors could vary becauseof individual’s age, gender, physical conditions etc. and analyzing data from a single sensorcould mislead the diagnosis result. Today, one proposition is that sensor signal fusion canprovide more reliable and efficient outcome than using data from single sensor and it is alsobecoming significant in numerous diagnosis fields including medical diagnosis andclassification. Case-Based Reasoning (CBR) is another well established and recognizedmethod in health sciences. Here, an entropy based algorithm, “Multivariate MultiscaleEntropy analysis” has been selected to fuse multiple sensor signals. Other physiologicalsensor signals measurements are also taken into consideration for system evaluation. A CBRsystem is proposed to classify ‘healthy’ and ‘stressed’ persons using both fused features andother physiological i.e. Heart Rate Variability (HRV), Respiratory Sinus Arrhythmia (RSA),Finger Temperature (FT) features. The evaluation and performance analysis of the system have been done and the results ofthe classification based on data fusion and physiological measurements are presented in thisthesis work.
69

Case-Based Argumentation in Agent Societies

Heras Barberá, Stella María 02 November 2011 (has links)
Hoy en día los sistemas informáticos complejos se pueden ven en términos de los servicios que ofrecen y las entidades que interactúan para proporcionar o consumir dichos servicios. Los sistemas multi-agente abiertos, donde los agentes pueden entrar o salir del sistema, interactuar y formar grupos (coaliciones de agentes u organizaciones) de forma dinámica para resolver problemas, han sido propuestos como una tecnología adecuada para implementar este nuevo paradigma informático. Sin embargo, el amplio dinamismo de estos sistemas requiere que los agentes tengan una forma de armonizar los conflictos que surgen cuando tienen que colaborar y coordinar sus actividades. En estas situaciones, los agentes necesitan un mecanismo para argumentar de forma eficiente (persuadir a otros agentes para que acepten sus puntos de vista, negociar los términos de un contrato, etc.) y poder llegar a acuerdos. La argumentación es un medio natural y efectivo para abordar los conflictos y contradicciones del conocimiento. Participando en diálogos argumentativos, los agentes pueden llegar a acuerdos con otros agentes. En un sistema multi-agente abierto, los agentes pueden formar sociedades que los vinculan a través de relaciones de dependencia. Estas relaciones pueden surgir de sus interacciones o estar predefinidas por el sistema. Además, los agentes pueden tener un conjunto de valores individuales o sociales, heredados de los grupos a los que pertenecen, que quieren promocionar. Las dependencias entre los agentes y los grupos a los que pertenecen y los valores individuales y sociales definen el contexto social del agente. Este contexto tiene una influencia decisiva en la forma en que un agente puede argumentar y llegar a acuerdos con otros agentes. Por tanto, el contexto social de los agentes debería tener una influencia decisiva en la representación computacional de sus argumentos y en el proceso de gestión de argumentos. / Heras Barberá, SM. (2011). Case-Based Argumentation in Agent Societies [Tesis doctoral no publicada]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/12497 / Palancia
70

Multipurpose Case-Based Reasoning System, Using Natural Language Processing

Augustsson, Christopher January 2021 (has links)
Working as a field technician of any sort can many times be a challenging task. Often you find yourself alone, with a machine you have limited knowledge about, and the only support you have are the user manuals. As a result, it is not uncommon for companies to aid the technicians with a knowledge base that often revolves around some share point. But, unfortunately, the share points quickly get cluttered with too much information that leaves the user overwhelmed. Case-based reasoning (CBR), a form of problem-solving technology, uses previous cases to help users solve new problems they encounter, which could benefit the field technician. But for a CBR system to work with a wide variety of machines, the system must have a dynamic nature and handle multiple data types. By developing a prototype focusing on case retrieval, based on .Net core and MySql, this report sets the foundation for a highly dynamic CBR system that uses natural language processing to map case attributes during case retrieval. In addition, using datasets from UCI and Kaggle, the system's accuracy is validated, and by using a dataset created explicitly for this report, the system manifest to be robust.

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