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Dissertations / Theses on the topic 'Multi-Agent-System'
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1
Wahlström, Marco, and Jonas Karlsson. "Multi-Agent-System till brädspel." Thesis, Blekinge Tekniska Högskola, Sektionen för datavetenskap och kommunikation, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-2388.
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För att ta reda på hur väl en Multi-Agent-Systems-bot kan stå sig mot andra, icke-MAS-bottar, så har vi implementerat en bot till brädspelet Arimaa. Botten är implementerad i C++ och den kan spela mot andra bottar, eller människor, genom Arimaas officiella hemsida. Syftet har varit att skapa en fullfjädrad bot som både klarar av att spela korrekt, och att spela bra. För att ta reda på om MAS är en bra designfilosofi för Arimaa så har vi utmanat ett antal av de bottar som andra människor skapat och lagt upp på hemsidan. Alla bottarna har under tiden de legat uppe blivit rankade genom tävlingar och utmaningar och flera av dessa har tävlat om stora pengar, vilket betyder att människor har lagt mycket tid på dem. Efter ett stort antal matcher mot andra bottar så har vi kommit fram till att Arimaa är ett väldigt svårt spel att koda bottar till. Vi lyckades bara slå några av de sämsta bottarna på hemsidan men MAS visar stor potential och vi tror att man kan göra väldigt avancerade bottar med det. Jämfört med de bästa bottarna så är vår väldigt snabb och minneseffektiv. Man borde absolut experimentera mer.
2
Sharma, Naveen, and n/a. "A multi agent system framework for.NET." University of Canberra. Information Sciences & Engineering, 2005. http://erl.canberra.edu.au./public/adt-AUC20060726.153250.
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This thesis presents an approach to modeling Multi Agent Systems (MAS). A framework and its implementation are presented as an extension to .NET. A number of definitions of agents are evaluated for the purpose of a broad understanding of the term software agent. Software agent has been defined in MAS context and its characteristics are identified and implemented. Motivation factors for building framework for MAS have been discussed. A number of existing technologies are discussed and evaluated. A number of agent systems previously developed are also being discussed in the middle part of the thesis. A model software agent has been defined and its characteristics are divided in two basic categories essential and optional. Its implementation has been distributed into different components throughout the MAS framework. Some of these characteristics are jointly implemented by a number of components and others responsibility rest on the individual components. Detail working of the MAS framework (i.e. what to do, when to do) is explained as guide to develop MAS using MAS framework. The protocols followed by the framework components to make communication possible between them are discussed at components level. The required information for developing MAS using MAS framework are also discussed. It answers the why, when and how questions in regards to using MAS framework A case study on Dynamic Truck Scheduling (DTS) system is discussed, designed and implemented using the MAS framework. DTS System has been used as a prototype application to test and evaluate the framework. DTS also represents a model problem that can be answered by using MAS; complete in-depth details about the problem statement are discussed. It also discusses the design and implementation of the solution along with the test results of the framework. Possible future expansion is presented in light of a number of limitations known of the MAS framework. The code working behind the different components of the MAS framework is given in appendices. Some important standards of XML that are used to pass information between agents and MAS framework components are also given in the format of tables.
3
林衛華 and Wai-wa Lam. "Multi-agent based human immune system." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1999. http://hub.hku.hk/bib/B31221117.
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Warshawsky, Nimrod 1976. "Extending the Metaglue multi-agent system." Thesis, Massachusetts Institute of Technology, 1999. http://hdl.handle.net/1721.1/80135.
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Thesis (M.Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1999.Includes bibliographical references (leaf 66).
by Nimrod Warshawsky.
M.Eng.
5
Lam, Wai-wa. "Multi-agent based human immune system /." Hong Kong : University of Hong Kong, 1999. http://sunzi.lib.hku.hk/hkuto/record.jsp?B2093337X.
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Åkerström, Otto. "Multi-Agent System for Coordinated Defence." Thesis, KTH, Matematisk statistik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-273582.
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Today defence systems are becoming more complex as technology advances and it is of great importance to explore new ways of solving problems and keep national defence current. In particular, Artificial Intelligence (AI) is used in an increasing number of industries such as logistic solutions, inventory management and defence. This thesis will evaluate the possibility to use Reinforcement Learning (RL) in an Air Defence Coordination(ADC) scenario at Saab AB. To evaluate RL, a simplified ADC-scenario is considered and solved using two different methods, Q-learning and Deep Q-learning (DQL). The results of the two methods are discussed as well as the limitations in scope and complexity for Q-learning. Deep Q-learning, on the other hand shows to be relatively easy to apply to more complicated scenarios. Finally, one last experiment with a far more complex scenario is constructed in order to show the scalability of DQL and create a foundation for future work in this field.Dagens försvarssystem blir allt mer komplexa när tekniken utvecklas och det blir allt viktigare att utforska nya sätt att lösa problem för att ha ett toppmodernt försvar. I synnerhet används Artificiell intelligens (AI) i ett ökande antal branscher så som logistik, lagerhantering och försvar. Detta arbete kommer att utvärdera möjligheten att använda Förstärkt inlärning (RL) i ett Koordinerat luftförsvar (ADC) scenario hos Saab AB. För att utvärdera RL, löses ett förenklat ADC-scenario med två olika metoder, Q-learning och Deep Q-learning (DQL). Resultatet av de två metoderna diskuteras så väl som begränsningar för Q-learning. Å andra sidan visar sig DQL vara relativt enkelt att tillämpa i ett mer komplext scenario. Slutligen görs ett sista experiment med ett mycket mer komplicerat scenario för att visa skalbarheten för DQL och skapa en naturlig övergång till framtida arbete.
7
Colwill, Ian. "Multi agent system platform in programmable logic." Thesis, University of Sussex, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.445591.
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Borselius, Niklas. "Multi-agent system security for mobile communications." Thesis, Royal Holloway, University of London, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.407884.
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Chin, Shou-fong. "Multi-agent as a decision support system." Thesis, Imperial College London, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.287526.
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Ramachandran, Thiagarajan. "Algorithmically induced architectures for multi-agent system." Diss., Georgia Institute of Technology, 2016. http://hdl.handle.net/1853/55019.
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The objective of this thesis is to understand the interactions between the computational mechanisms, described by algorithms and software, and the physical world, described by differential equations, in the context of networked systems. Such systems can be denoted as cyber-physical nodes connected over a network. In this work, the power grid is used as a guiding example and a rich source of problems which can be generalized to networked cyber-physical systems. We address specific problems that arise in cyber-physical networks due to the presence of a computational network and a physical network as well as provide directions for future research.
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Bhattacharya, Shaondip. "Multi-agent System Distributed Sensor Fusion Algorithms." Thesis, Luleå tekniska universitet, Rymdteknik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-65839.
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The concept of consensus filters for sensor fusion is not an entirely new proposition but one with an internally implemented Bayesian fusion is. This work documents a novel state update algorithm for sensor fusion which works using the principle of Bayesian fusion of data with variance implemented on a single integrator consensus algorithm. Comparative demonstrations of how consensus over a pinning network is reached are presented along with a weighted Bayesian Luenberger type observer and a ’Consensus on estimates’ algorithm. This type of a filter is something that is novel and has not been encountered in previous literature related to this topic to the best of our knowledge. In this work, we also extend the proof for a distributed Luenberger type observer design to include the case where the network being considered is a strongly connected digraph.
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DRIAS, YASSINE. "Web information foraging using Multi-agent System." Doctoral thesis, Università degli Studi di Milano-Bicocca, 2017. http://hdl.handle.net/10281/195637.
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Lo scopo principale dei motori di ricerca, che supportano il compito di information retrieval, è quello di fornire agli utenti un metodo facile per trovare informazioni sul Web. Nonostante i loro vantaggi, i motori di ricerca hanno ancora numerosi limiti. Sono state realizzate diverse opere per migliorare i sistemi di accesso alle informazioni e offrire un'esperienza di utilizzo migliore in settori diversi, come distribuite e contestuali information retrieval, link analysis e exploratory search.
Questa tesi si occupa di Web Information Foraging, un paradigma di information access più recente che mira a scoprire i percorsi che portano a informazioni rilevanti sul Web. L'obiettivo principale della ricerca intrapresa durante il Ph.D. è stato quello di progettare e implementare sistemi efficaci ed efficienti di Information Foraging basati sulla tecnologia multi-agent. A questo scopo, abbiamo studiato information foraging in diversi domini, tra cui salute, pubblicazioni scientifiche e social media.
Per affrontare questo problema, abbiamo proposto un'architettura modulare con due fasi importanti per il sistema di Information Foraging. La prima fase è un processo di apprendimento che mira a localizzare le pagine Web più rilevanti che potrebbero interessare l'utente secondo i propri interessi. Questo può essere eseguito su un'istanza fissa del Web. La seconda fase tiene conto dell'apertura e della dinamicità del Web e consiste in un apprendimento incrementale partendo dai risultati della prima fase e ricondizionando i risultati tenendo conto delle modifiche apportate sul Web. L'intero sistema offre uno strumento per aiutare gli utenti a accedere facilmente alle informazioni online. Lo sviluppo del sistema ha attraversato tre importanti passaggi in cui sono stati utilizzati diversi concetti e tecnologie per ottenere efficacia ed efficienza e anche rendere il sistema in grado di operare in diversi ambienti.
Innanzitutto, abbiamo proposto un approccio basato sulla Swarm Intelligence per simulare il processo di foraggicazione come descritto nella Information Foraging Theory. Abbiamo eseguito la nostra proposta utilizzando Bee Swarm Optimization (BSO) per realizzare un processo automatico di information foraging fondato sul comportamento del foraggicazione delle informazioni dell'uomo. Conoscendo che BSO è un approccio di swarm intelligence che coinvolge agenti reattivi e che il concetto di Information Foraging si basa sulla natura, abbiamo pensato che questo potrebbe essere uno dei modi più appropriati per affrontare il problema del Web Information Foraging. Per convalidare la nostra proposta, sono stati condotti esperimenti su MedlinePlus, un sito dedicato al dominio medico e che contiene informazioni su oltre 1000 malattie e condizioni sanitarie. I risultati sono stati promettenti e hanno dimostrato la capacità di Information Foraging di accedere alle informazioni pertinenti sul Web in base agli interessi di un utente.The main purpose of search engines, which support the task of Information Retrieval, is to provide the users with an easy method to find information on the Web. Despite their advantages, Web search engines still have numerous limitations. Several works have been done to enhance information access systems and offer a better user experience in different fields such as distributed and contextual information retrieval, link analysis and exploratory search. This thesis deals with Web Information Foraging, which is a recent information access paradigm that aims at discovering paths leading to relevant information on the Web. The principal goal of the research undertaken during the Ph.D. has been to design and implement effective and efficient Information Foraging systems based on multi-agent technology. For this purpose, we investigated Information Foraging in different domains including health, scientific publications and social media. To address this issue, we proposed a modular architecture with two important phases for the Information Foraging system to be developed. The first phase is a learning process, which aims to locate the most relevant Web pages that might interest the user according to his/her interests. This can be performed on a fixed instance of the Web. The second phase takes into account the openness and dynamicity of the Web and it consists of an incremental learning starting from the results of the first phase and reshaping the outcomes taking into account the changes that occur on the Web. The whole system offers a tool to help users access information online easily. The development of the system went through three important steps, where different concepts and technologies were used in order to achieve both effectiveness and efficiency and also to make the system able to operate on various environments.
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Shibghatullah, Abdul Samad. "A multi-agent system for a bus crew rescheduling system." Thesis, Brunel University, 2008. http://bura.brunel.ac.uk/handle/2438/5423.
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Unpredictable events (UE) are major factors that cause disruption to everyday bus operation. In the occurrence of UE, the main resources - crews and vehicles - are affected, and this leads to crew schedule disruption. One way to deal with the problem is crew rescheduling. Most of the current approaches are based on static schedules do not support rescheduling in a real-time scenario. They have the ability to reschedule but a new complete schedule is produced without concerning the real time situation. The mathematical approaches which are used by most scheduling packages have the ability to search for optimum or near optimum schedules but they are usually slow to produce results in real-time because they are computationally intensive when faced with complex situations. In practice, crew or bus rescheduling is managed manually, based on the supervisor's capabilities and experience in managing UE. However, manual rescheduling is complex, prone to error and not optimum, especially when dealing with many UE at the same time. This research proposes the CRSMAS (Crew Rescheduling System with Multi Agent System) approach as an alternative that may help supervisors to make quick rescheduling decisions by automating the crew rescheduling process. A Multi Agent System (MAS) is considered suitable to support this rescheduling because agents can dynamically adapt their behaviour to changing environments and they can find solutions quickly via negotiations and cooperation between them. To evaluate the CRSMAS, two types of experiment are carried out: Single Event and Multiple Events. The Single Event experiment is used to find characteristics of crew schedules that influence the crew rescheduling process while the Multiple Events experiment is used to test the capability of CRSMAS in dealing with numerous events that occur randomly. A wide range of simulation results, based on real-world data, are reported and analysed. Based on the experiment it is concluded that CRSMAS is suitable for automating the crew rescheduling process and capable of quick rescheduling whether facing single events or multiple events at the same time, the success of rescheduling is not only dependant on the tool but also to other factors such as the characteristics of crew schedules and the period of the UE, and one limitation of CRSMAS that was discovered is it cannot simulate different type of events at the same time. This limitation is because in different events there are different rules but, in Virtual World, agents can only negotiate with one set of rules at a time.
14
潘淑欣 and Shuk-yan Poon. "A decentralized multi-agent system for restructured power system operation." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1997. http://hub.hku.hk/bib/B31219810.
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Poon, Shuk-yan. "A decentralized multi-agent system for restructured power system operation /." Hong Kong : University of Hong Kong, 1997. http://sunzi.lib.hku.hk/hkuto/record.jsp?B19616211.
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Gill, Martin L. "Combining MAS and P2P systems : the Agent Trees Multi-Agent System (ATMAS)." Thesis, University of Stirling, 2005. http://hdl.handle.net/1893/108.
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The seamless retrieval of information distributed across networks has been one of the key goals of many systems. Early solutions involved the use of single static agents which would retrieve the unfiltered data and then process it. However, this was deemed costly and inefficient in terms of the bandwidth since complete files need to be downloaded when only a single value is often all that is required. As a result, mobile agents were developed to filter the data in situ before returning it to the user. However, mobile agents have their own associated problems, namely security and control. The Agent Trees Multi-Agent System (AT-MAS) has been developed to provide the remote processing and filtering capabilities but without the need for mobile code. It is implemented as a Peer to Peer (P2P) network of static intelligent cooperating agents, each of which control one or more data sources. This dissertation describes the two key technologies have directly influenced the design of ATMAS, Peer-to-Peer (P2P) systems and Multi-Agent Systems (MAS). P2P systems are conceptually simple, but limited in power, whereas MAS are significantly more complex but correspondingly more powerful. The resulting system exhibits the power of traditional MAS systems while retaining the simplicity of P2P systems. The dissertation describes the system in detail and analyses its performance.
17
Galanda, Martin. "Automated polygon generalization in a multi agent system /." [S.l.] : [s.n.], 2003. http://opac.nebis.ch:80/F/?func=service&doc_library=EBI01&doc_number=004623660&line_number=0001&func_code=WEB-FULL&service_type=MEDIA.
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Schillo, Sebastian. "Development of an Evolvable Production Multi-Agent System." Thesis, KTH, Industriell produktion, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-41278.
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Industrial requirements of modern, agile production aim at achieving intelligent behaviour andfast reconfigurability of the production system. Evolvable Production Systems (EPS) is anovel production systems paradigm, incorporating principles of modularity and adaptability.EPS uses process-specific modules, Ontologies and the EPS-knowledge base to enablethese characteristics. The thesis proposes a heterarchical control architecture, implementedas Multi-Agent System, to enable adaptation and evolution of the production system.Therefore agents are realized as software representations of physical production equipment.The implementation of EPS components (EPS-Ontology and knowledge base) areelaborated and the advanced behaviour of the Multi-Agent System is detailed: Selfawarenessof agents concerning their skills, based on the agent state representation,facilitates reasoning capabilities and advanced coordination strategies for production tasks.The thesis investigates the structure of the proposed multi-agent control architecture by asimulation of two heterarchical architectures on machine-level and evaluates dependenciesof efficiency and robustness related to organisational structures of the agent society. Finally,system reconfigurability, which is achieved by changing multi-agent interactions, iselaborated in detail.
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Cheng, Zhiyong. "A multi-agent security system for Android platform." Thesis, University of British Columbia, 2012. http://hdl.handle.net/2429/43775.
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The Android mobile platform is fast becoming the most popular operating system for mobile devices. Although Android security is an emerging research area and there have been many commercial and research solutions made available, the resource constrained nature of mobile devices dedicates a continuous pursuit for efficiencies. In this thesis, we present the design and implementation of a multi-agent security system on the Android platform, which is built on the Foundation for Intelligent Physical Agents (FIPA) specifications compliant Java Agent Development framework (JADE). A prototype system is implemented and studied. In our design, the agents in the prototype system are aware of resource constraints such as battery capacity, network bandwidth, and dynamically adjust their behaviors accordingly to achieve a balance between the resources consumption and security needs. Following an analysis and design methodology recommended by JADE and Android development guidelines, the prototype system provides compatibility with other multi-agent systems and allows easy adaptations to many security scenarios. Several baseline performance measurements are adopted to measure the efficiency of the prototype system.
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Turaif, Mansoor Abdulaziz. "Multi-agent system for consumer-oriented electronic commerce." Thesis, Brunel University, 1999. http://bura.brunel.ac.uk/handle/2438/4324.
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With the advent of the information superhighway and the exponential growth of the Internet usage, the importance of multi-agent systems is proliferating. The central theme of this thesis is to demonstrate the benefits of adopting multi-agent system (MAS) paradigm to implement consumer oriented electronic commerce system. The discipline of computational science is exploited to provide insights into the behaviour of a model of consumer behaviour that reflect the cognitive notion that the thesis has developed. For this, a multi-agent system computational environment is used to model and investigate the consumer purchase over the Internet. The MAS is developed based on a presented taxonomy, that is most relevant to the thesis application. The thesis also presents a novel approach to negotiation. Results of empirical evaluations provide a strong support that agents using the proposed approach would achieve higher payoff than human subjects. An empirical evaluation for the usability of the prototype system is also presented. Reported results are very encouraging to implement a fieldable system. To complement the perspective for a complete consumer-oriented EC system, the thesis addresses and develops approaches for searching and extracting relevant information. Example experiments are also reported to act as indicators for the effectiveness of the developed approaches.
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Sun, Shanghua. "A multi-agent system to support adaptive education." Thesis, University of Warwick, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.436646.
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AZEVEDO, SERGIO CIGLIONE DE. "MASSES: MULTI-AGENT SYSTEM FOR STOCK EXCHANGE SIMULATION." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2008. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=25789@1.
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PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIROCOORDENAÇÃO DE APERFEIÇOAMENTO DO PESSOAL DE ENSINO SUPERIOR
PROGRAMA DE EXCELENCIA ACADEMICA
A partir do avanço tecnológico, o acesso à informação vem se tornando cada dia mais simples e mais rápido, facilitando consideravelmente o processo de tomada de decisões. Tais mudanças afetam o comportamento de empresas de todas as áreas e da sociedade em geral. No cenário econômico, o Mercado de Valores é um bom exemplo dessa transformação e, por esse motivo, foi escolhido como o domínio de aplicação a ser utilizado pelo simulador Multi-Agent System dor Stock Exchange Simulation (MASSES). Inspirado nos casos de sucesso de competições baseadas em Sistemas Multi-Agentes, trata-se de um simulador onde agentes de software desempenham o papel de investidores. Através do MASSES, podem ser realizados estudos comparativos entre diversas estratégias e análises de como elas se comportam em diferentes situações. A principal contribuição do MASSES é estimular pesquisadores a desenvolver as tecnologias de Engenharia de Software para Sistemas de Multi-Agentes (ESSMA) e inteligência artificial, estreitando ainda mais o relacionamento entre a tecnologia da informação e o mercado financeiro. Essa dissertação apresenta o simulador MASSES e os testes realizados a partir de estratégias de investimento utilizadas no mundo real.
Due to technological advancements in IT, access to information is becoming simpler and faster every day, thus facilitating the decision-making processes. These changes affect the behavior of all kinds of businesses and the society in general. In the economic scenario, Stock Exchange Market is a good example of this transformation and therefore was chosen as the application domain to be explored by a Multi-Agent System for Stock Exchange Simulation (MASSES). Inspired by success stories about Multi-Agent System applied to competitions. MASSES is a simulator where software agents play the role of investors. Through MASSES simulations, it is possible to perform studies among different situations. MASSES main contribution is to encourage researches to develop Software Engineering for Multi-Agents Systems using artificial intelligence techniques, thus strenghtening the relationship between information technology and the financial market. The present dissertation aims to explain MASSES, in addition to showing test results based on the investment strategies used in the real world.
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Srivastava, Sanjeev Kumar. "Multi-Agent System for predictive reconfiguration of Shipboard Power Systems." Diss., Texas A&M University, 2003. http://hdl.handle.net/1969.1/1593.
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The electric power systems in U.S. Navy ships supply energy to sophisticated systems for weapons, communications, navigation and operation. The reliability and survivability of the Shipboard Power System (SPS) are critical to the mission of a surface combatant ship, especially under battle conditions. In the event of battle, various weapons might attack a ship. When a weapon hits the ship it can cause severe damage to the electrical system on the ship. This damage can lead to de-energization of critical loads on a ship that can eventually decrease a ships ability to survive the attack. It is very important, therefore, to maintain availability of energy to the connected loads that keep the power systems operational. Technology exists that enables the detection of an incoming weapon and prediction of the geographic area where the incoming weapon will hit the ship. This information can then be used to take reconfiguration actions before the actual hit so that the actual damage caused by the weapon hit is reduced. The Power System Automation Lab (PSAL) has proposed a unique concept called "Predictive Reconfiguration" which refers to performing reconfiguration of a ships power system before a weapon hit to reduce the potential damage to the electrical system caused by the impending weapon hit. The concept also includes reconfiguring the electrical system to restore power to as much of the healthy system as possible after the weapon hit. This dissertation presents a new methodology for Predictive Reconfiguration of a Shipboard Power System (SPS). This probabilistic approach includes a method to assess the damage that will be caused by a weapon hit. This method calculates the expected probability of damage for each electrical component on the ship. Also a heuristic method is included, which uses the expected probability of damage to determine reconfiguration steps to reconfigure the ships electrical network to reduce the damage caused by a weapon hit. This dissertation also presents a modified approach for performing a reconfiguration for restoration after the weapon hits the system. In this modified approach, an expert system based restoration method restores power to loads de-energized due to the weapon hit. These de-energized loads are restored in a priority order. The methods were implemented using multi-agent technology. A test SPS model based on the electrical layout of a non-nuclear surface combatant ship was presented. Complex scenarios representing electrical casualties caused due to a weapon hit, on the test SPS model, were presented. The results of the Predictive Reconfiguration methodology for complex scenarios were presented to illustrate the effectiveness of the developed methodology.
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Pawloski, Joel S. "Modeling tactical level combat using a Multi-agent System Design Paradigm (GI Agent)." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2001. http://handle.dtic.mil/100.2/ADA391678.
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Thesis (M.S. in Modeling, Virtual Environments and Simulation (MOVES))--Naval Postgraduate School, March 2001.Thesis advisors, Michael Zyda, John E. Hiles. Includes bibliographical references (p. 81-82). Also available online.
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Serce, Fatma Cemile. "A Multi-agent Adaptive Learning System For Distance Education." Phd thesis, METU, 2008. http://etd.lib.metu.edu.tr/upload/12609220/index.pdf.
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The adaptiveness provides uniquely identifying and monitoring the learner&rsquos learning activities according to his/her respective profile. The adaptive intelligent learning management systems (AILMS) help a wide range of students to achieve their learning goals effectively by delivering knowledge in an adaptive or individualized style through online learning settings. This study presents a multi-agent system, called MODA, developed to provide adaptiveness in learning management systems (LMS). A conceptual framework for adaptive learning systems is proposed for this purpose. The framework is based on the idea that adaptiveness is the best matching between the learner profile and the course content profile. The learning styles of learners and the content type of learning material are used to match the learner to the most suitable content. The thesis covers the pedagogical framework applied in MODA, the technical and multi-agent architectures of MODA, the TCP-IP based protocol providing communication between MODA and LMS, and a sample application of the system to an open source learning management system, OLAT. The study also discusses the possibilities of future interests.
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de, Azevedo Ricardo. "Fully Decentralized Multi-Agent System for Optimal Microgrid Control." FIU Digital Commons, 2016. http://digitalcommons.fiu.edu/etd/2461.
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In preparation for the influx of renewable energy sources that will be added to the electrical system, flexible and adaptable control schemes are necessary to accommodate the changing infrastructure. Microgrids have been gaining much attention as the main solution to the challenges of distributed and intermittent generation, but due to their low inertia, they need fast-acting control systems in order to maintain stability. Multi-Agent Systems have been proposed as dynamic control and communication frameworks. Decentralized arrangements of agents can provide resiliency and the much-desired “plug and play” behavior. This thesis describes a control system that implements droop control and the diffusion communication scheme without the need of a centralized controller to coordinate the Microgrid agents to maintain the frequency and stable operating conditions of the system. Moreover, the inter-agent communication is unaffected by changing network configurations and can achieve optimal economic dispatch through distributed optimization.
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Lupa, Aleksander. "Using multi-agent system for code and data propagation." Thesis, Blekinge Tekniska Högskola, Avdelningen för programvarusystem, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-4410.
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This work presents the concept of code and data propagation in a multi-agent system. First, the concepts of agent and multi-agent system are defined and examples are presented. Also arguments for using agent approach are given and potential benefits are listed. Afterwards the idea of code and data propagation is defined and explained. Then some examples of real solutions are given along with propagation algorithms, which depict the way of introducing the concept into real system solutions. Afterwards the code and data propagation in a multi-agent system is described, which is in many cases based on the object migration. Discussion about this concept ends with describing the types of agent migration and giving some examples of systems with agent migration. Then three multi-agent environments are described and one is chosen to be the basis of the implemented application. Second part of work starts with description of systems principal objective, which is the distributed calculating of prime numbers. At the beginning, agents of the system are presented, and then the main system processes are depicted in detail. All algorithms are shown in sequence diagrams, which point all asynchronisms in the system. Afterwards migration phase is described with all migration types and algorithms. The experiments are conducted in two environments: home and university. The main aim is to find optimal configurations for both environments. The conclusion from this work is that introducing code and data propagation to a multiagent system in a form of agent migration in a heterogeneous network could considerably decrease the execution time. Moreover based on the efficiency vector of computers participating in the experiment there is a possibility to set a task distribution, which is close to optimal, without searching for optimal configuration every time when running the experiment.
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MELO, TACIANA MELCOP LACERDA DE. "A MULTI-AGENT SYSTEM FOR SIMULTANEOUS AND RELATED AUCTIONS." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2003. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=3909@1.
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PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIROEste trabalho apresenta um sistema multi-agente para negociação em leilões simultâneos de bens relacionados. A dissertação descreve a arquitetura multiagente, como também a análise e desenvolvimento de estratégias para negociação em leilões simultâneos, onde são desejados bens relacionados, em contrapartida com bens isolados. Alguns problemas bem conhecidos em negociação foram identificados no projeto da arquitetura do sistema, tais como predição de preços, alocação de bens, tomadas de decisão, raciocínio sob incerteza e segmentação de demanda. Cada agente que compõe o sistema trata um destes subproblemas. Isto torna possível a aplicação de diferentes técnicas de computação para resolver os subproblemas separadamente e depois combinar as soluções. Utilizou-se o Trading Agent Competition (TAC) para exemplificar as técnicas examinadas. O TAC foi escolhido para testar as heurísticas desenvolvidas por apresentar um conjunto de características que se enquadram adequadamente no domínio em exame. Cada heurística desenvolvida foi testada e seus resultados comparados com edições anteriores do TAC. O sistema multi- agente apresentou uma boa performance em cenários competitivos testados usando o servidor TAC.
This work presents a multi-agent system to trade in simultaneous auctions of related goods. The dissertation describes the multi-agent architecture, and also the analysis and development of strategies for trading in simultaneous auctions, where the purchase of combined goods is required. Some well known problems in trading were identified in order to design the architecture, such as price prediction, good allocation, decision making, reasoning under uncertainty, and demand segmentation. Each agent that composes the system is concerned with one of those trading subproblems. This makes possible to apply different computational techniques to separately solve the subproblems and then combine the solutions. The Trading Agent Competition (TAC) is used to illustrate our approach. TAC was chosen to test the developed heuristics since it presents a set of characteristics that adequately fits the problem domain. Each heurist developed was tested and had its results compared to TAC previous editions. Finally, the system shows a high performance on very competitive scenarios tested by using the TAC server environment.
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MOISES, CYNTHIA LUIZA RIGO. "DEPENDABILITY OF OPEN MULTI-AGENT SYSTEM: A CONTRACT APPROACH." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2008. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=13626@1.
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COORDENAÇÃO DE APERFEIÇOAMENTO DO PESSOAL DE ENSINO SUPERIORNesta dissertação apresenta-se um modelo para aplicação de contratos em ambientes multi-agentes abertos. A idéia principal em um sistema multiagente é que um comportamento global inteligente possa ser alcançado a partir do comportamento individual dos agentes. Neste contexto, surge a dificuldade em se garantir que agentes estão cooperando corretamente para alcançar os objetivos da organização no qual estão inseridos. O modelo proposto neste trabalho visa expandir os conceitos de contratos em componentes a sistemas multi-agentes abertos. Contratos podem ser entendidos como uma forma de negociação entre componentes, no qual se estabelecem obrigações e benefícios que devem ser respeitados por todos os participantes do contrato na execução de serviços. Porém, quando o assunto é sistemas multi-agentes, há pouca literatura disponível. Isto se deve pela dificuldade de se traduzir contratos para componentes sobre o paradigma orientado a objetos às características dos agentes. Componentes possuem métodos e interfaces bem definidas, enquanto agentes ocultam suas estruturas internas e talvez apresentem comportamentos complexos. Um framework foi desenvolvido baseado no modelo conceitual proposto. O resultado visa demonstrar a viabilidade de se aplicar contratos para componentes a ambientes multi-agentes abertos, com o objetivo de gerenciar e averiguar a cooperação entre agentes, levando em consideração seus papéis na organização e respeitando suas características individuais.
In this work, we propose a model for applying contracts in open multi-agent systems. The main idea in a multi-agent system is that an intelligent global behavior can be reached from the individual behavior of the agents. In this context, it is difficulty to guarantee that the agents are correctly cooperating to reach the organization objectives in which they are inserted. The model considered in this work expands the contract concepts in components to open multi-agent system. Contracts can be understood as a negotiation form between components, which entails obligations and benefits for both parties. However, when the subject is multi-agent systems, there are a few available literatures. This is explained because contracts for components, guided on object paradigm, are hard to be translated to the characteristics of the agents. Components have methods and well defined interfaces, while agents hide their internal structures and perhaps they present complex behaviors. A framework was developed based on the conceptual model we are proposing. The result demonstrates the viability of applying contracts for components to the open multi-agents environments. The main goal is to manage and to inquire the cooperation between agents, considering the agents roles in the organization and respecting the individual agent characteristics.
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Martins, Rodrigo Castro. "An organization based multi agent system for smarthome management." Pontif?cia Universidade Cat?lica do Rio Grande do Sul, 2014. http://tede2.pucrs.br/tede2/handle/tede/5256.
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Previous issue date: 2014-02-24Buscando enfrentar os desafios de gerar energia de forma mais limpa, novas t?cnicas precisam ser desenvolvidas tanto para a produ??o de eletricidade com baixa emiss?o de g?s carb?nico quanto otimizar a distribui??o e consumo de energia existente. T?cnicas foram desenvolvidos especificamente para combater este ?ltimo desafio. Nossa pesquisa tem como objetivo contribuir para melhorar a efici?ncia do uso de energia em uma resid?ncia modelando os eletrodom?sticos como um sistema multi agentes (MAS). Modelamos este sistema como uma organiza??o virtual em que os agentes formam grupos e hierarquias e seguem espec?ficas regras de comportamento. Este modelo visa minimizar o consumo de energia, enquanto alcan?a um equil?brio entre o conforto do usu?rio e o custo da energia, al?m de limitar picos de demanda de energia.
In order to address the challenges of greener energy generation, new techniques need to be developed both to generate electricity with lower emissions and to optimize energy distribution and consumption. Smart grid techniques have been developed specifically to tackle this latter challenge. Our research aims to contribute to improve the efficiency of energy use within a single household by modeling appliances as a multi agent system (MAS). We model this system as a virtual organization in which agents form groups and hierarchies and follow specific behavioral rules. This model seeks to minimize energy consumption while reaching a tradeoff between user comfort, energy cost and limiting peak energy usage.
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Martins, Rodrigo Castro. "An organization based multi agent system for smarthome manangement." Pontifícia Universidade Católica do Rio Grande do Sul, 2014. http://hdl.handle.net/10923/6042.
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Previous issue date: 2014In order to address the challenges of greener energy generation, new techniques need to be developed both to generate electricity with lower emissions and to optimize energy distribution and consumption. Smart grid techniques have been developed specifically to tackle this latter challenge. Our research aims to contribute to improve the efficiency of energy use within a single household by modeling appliances as a multi agent system (MAS). We model this system as a virtual organization in which agents form groups and hierarchies and follow specific behavioral rules. This model seeks to minimize energy consumption while reaching a tradeoff between user comfort, energy cost and limiting peak energy usage.
Buscando enfrentar os desafios de gerar energia de forma mais limpa, novas técnicas precisam ser desenvolvidas tanto para a produção de eletricidade com baixa emissão de gás carbônico quanto otimizar a distribuição e consumo de energia existente. Técnicas foram desenvolvidos especificamente para combater este último desafio. Nossa pesquisa tem como objetivo contribuir para melhorar a eficiência do uso de energia em uma residência modelando os eletrodomésticos como um sistema multi agentes (MAS). Modelamos este sistema como uma organização virtual em que os agentes formam grupos e hierarquias e seguem específicas regras de comportamento. Este modelo visa minimizar o consumo de energia, enquanto alcança um equilíbrio entre o conforto do usuário e o custo da energia, além de limitar picos de demanda de energia.
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Haque, Ehsanul. "An Automated Multi-agent Framework For Testing Distributed System." OpenSIUC, 2013. https://opensiuc.lib.siu.edu/theses/1107.
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Testing is a part of the software development life cycle (SDLC) which ensures the quality and efficiency of the software. It gives confident to the developers about the system by early detecting faults of the system. Therefore, it is considered as one of the most important part of the SDLC. Unfortunately, testing is often neglected by the developers mainly because of the time and cost of the testing process. Testing involves lots of manpower, specially for a large system, such as distributed system. On the other hand, it is more common to have bugs in a large system than a small centralized system and therefore there is no alternative of testing to find and fix the bugs. The situation gets worst if the developer follows one of the most powerful development process called continuous integration process. This is because developers need to write the test cases in each cycle of the continuous integration process which increase the development time drastically. As a result, testing often neglected for large systems. This is an alarming situation because distributed system is one of the most popular and widely accepted system in both industries and academia. Therefore, this is one of the highly pressured areas where lot of developers engaged to provide distributed software solutions. If these systems delivered to the users untested, there is a high possibility that we will end up with a lot of buggy systems every year. There are also a very few number of testing framework exist in the market for testing distributed system compared to the number of testing framework exists for traditional system. The main reason behind this is, testing a distributed system is far difficult and complex process compares to test a centralized system. Most common technique to test a centralized system is to test the middleware which might not be the case for distributed system. Unlike the traditional system, distributed system can be resides in multiple location of different corners of the world. Therefore, testing and verification of distributed systems are difficult. In addition to this, distributed systems have some basic properties such as fault tolerance, availability, concurrency, responsiveness, security, etc. which makes the testing process more complex and difficult. This research proposed a multi-agent based testing framework for distributed system where multiple agent communicate with each other and accomplish the whole testing process for a distributed system. The bullet proof idea of testing centralizes system has been reused partially to design the framework so that developers will be more comfortable to use the framework. The research also focused on the automation of testing process which will reduce the time and cost of the whole testing process and relief the developer from re-generating the same test cases over and over before each release of the application. This paper briefly described the architecture of the framework and communication process between multiple agents.
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Wang, Zhu Wei. "Multi-agent path finding in an order picking system." Thesis, University of Macau, 2018. http://umaclib3.umac.mo/record=b3950627.
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Ruan, Jianhua, Han-Shen Yuh, and Koping Wang. "Spider III: A multi-agent-based distributed computing system." CSUSB ScholarWorks, 2002. https://scholarworks.lib.csusb.edu/etd-project/2249.
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The project, Spider III, presents architecture and protocol of a multi-agent-based internet distributed computing system, which provides a convenient development and execution environment for transparent task distribution, load balancing, and fault tolerance. Spider is an on going distribution computing project in the Department of Computer Science, California State University San Bernardino. It was first proposed as an object-oriented distributed system by Han-Sheng Yuh in his master's thesis in 1997. It has been further developed by Koping Wang in his master's project, of where he made large contribution and implemented the Spider II System.
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Samson, Rodelyn Reyes. "A multi-agent architecture for internet distributed computing system." CSUSB ScholarWorks, 2003. https://scholarworks.lib.csusb.edu/etd-project/2408.
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This thesis presents the developed taxonomy of the agent-based distributed computing systems. Based on this taxonomy, a design, implementation, analysis and distribution protocol of a multi-agent architecture for internet-based distributed computing system was developed. A prototype of the designed architecture was implemented on Spider III using the IBM Aglets software development kit (ASDK 2.0) and the language Java.
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Kontarinis, Dionysios. "Debate in a multi-agent system : multiparty argumentation protocols." Thesis, Paris 5, 2014. http://www.theses.fr/2014PA05S025/document.
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Cette thèse concerne l’étude des débats argumentatifs entre plusieurs agents artificiels. Notre travail est motivé par les difficultés qui surgissent quand un nombre important d’utilisateurs interagissent et débattent sur le Web, en échangeant des arguments sur différents sujets. Ces difficultés se situent au niveau de la représentation des connaissances des agents impliqués dans le débat, de la représentation du débat, de la façon de tirer les conclusions du débat, de l'évaluation de la qualité du débat, de la définition des protocoles spécifiques d'interaction, et de l'étude des stratégies des agents qui souhaitent atteindre un but précis via le débat. La contribution de cette thèse consiste donc en: a) la modélisation d'un débat argumentatif entre plusieurs agents, la modélisation des expertises de ces derniers, et l'agrégation des opinions des différents experts sur différentes parties d'un débat; b) l'apport d'une aide à l'agent responsable de la gestion d'un débat donné, la proposition d'une méthode permettant d'évaluer la qualité des débats argumentatifs en fonction de la confiance que l'on peut avoir en leurs conclusions, ainsi que la proposition de solutions permettant d'améliorer la qualité des débats dont les conclusions ne sont pas clairement établies; c) l'apport d'une aide permettant aux agents qui participent à un débat argumentatif de déterminer quels arguments placer dans le débat, l'étude des systèmes argumentatifs munis d'une structure dynamique, l'étude des moyens disponibles permettant à un agent d'influencer un système dynamique afin d'atteindre son but, l'étude des modifications minimales permettant à un agent d’atteindre un objectif donné, l'étude des stratégies argumentatives basées sur ce changement minimal; d) la définition, l'étude et l'évaluation des protocoles argumentatifs multi-agents, ainsi que la définition de protocoles de différents types (1) basés sur une évaluation numérique d'arguments et (2) basés sur des extensions d'arguments, l'utilisation des différentes techniques pour assurer la cohérence d'un débat tout en laissant une liberté d'expression aux agents, et enfin un grand nombre d'expérimentations (sur des débats) permettant de tester différentes stratégies et de les évaluer en fonction de différents critèresIn this thesis multi-agent argumentation debates are studied. Our work is motivated by the issues which are raised when a large number of users interact and debate on the Web, by exchanging arguments on various topics. These issues are raised on the levels of representing the debating users' knowledge, representing the debate, computing the debate's conclusions, evaluating the debate's quality, defining specific protocols for user interaction, and studying debate strategies which users employ in order to achieve particular goals. This thesis' contribution consists in: a) proposing a way to model a multi-agent argumentation debate where the participants have different types of expertise, and proposing a way to aggregate their opinions; b) offering support to the agent who is arbitrating a debate, proposing a way to evaluate the quality of a debate on the basis of how confident we can be on its conclusions, and proposing solutions for improving the quality of a debate which lacks definite conclusions; c) offering support to the debating agents in order to determine which arguments they should put forward, studying dynamic argumentation systems, studying the potential ways in which an agent can influence a dynamic argumentation system in order to achieve his goal, studying the minimal change allowing an agent to achieve his goal, studying several argumentation strategies based on minimal change; d) defining, studying and evaluating multi-agent argumentation protocols, defining protocols of different types (1) based on numerical argument evaluation and (2) based on argument extensions, using different techniques to ensure a debate's coherence while ensuring some liberty of expression to the agents, and finally performing an important number of experiments (on debates) in order to test various strategies and evaluate them with respect to specific criteria
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Kontarinis, Dionysios. "Debate in a multi-agent system : multiparty argumentation protocols." Electronic Thesis or Diss., Paris 5, 2014. http://www.theses.fr/2014PA05S025.
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Cette thèse concerne l’étude des débats argumentatifs entre plusieurs agents artificiels. Notre travail est motivé par les difficultés qui surgissent quand un nombre important d’utilisateurs interagissent et débattent sur le Web, en échangeant des arguments sur différents sujets. Ces difficultés se situent au niveau de la représentation des connaissances des agents impliqués dans le débat, de la représentation du débat, de la façon de tirer les conclusions du débat, de l'évaluation de la qualité du débat, de la définition des protocoles spécifiques d'interaction, et de l'étude des stratégies des agents qui souhaitent atteindre un but précis via le débat. La contribution de cette thèse consiste donc en: a) la modélisation d'un débat argumentatif entre plusieurs agents, la modélisation des expertises de ces derniers, et l'agrégation des opinions des différents experts sur différentes parties d'un débat; b) l'apport d'une aide à l'agent responsable de la gestion d'un débat donné, la proposition d'une méthode permettant d'évaluer la qualité des débats argumentatifs en fonction de la confiance que l'on peut avoir en leurs conclusions, ainsi que la proposition de solutions permettant d'améliorer la qualité des débats dont les conclusions ne sont pas clairement établies; c) l'apport d'une aide permettant aux agents qui participent à un débat argumentatif de déterminer quels arguments placer dans le débat, l'étude des systèmes argumentatifs munis d'une structure dynamique, l'étude des moyens disponibles permettant à un agent d'influencer un système dynamique afin d'atteindre son but, l'étude des modifications minimales permettant à un agent d’atteindre un objectif donné, l'étude des stratégies argumentatives basées sur ce changement minimal; d) la définition, l'étude et l'évaluation des protocoles argumentatifs multi-agents, ainsi que la définition de protocoles de différents types (1) basés sur une évaluation numérique d'arguments et (2) basés sur des extensions d'arguments, l'utilisation des différentes techniques pour assurer la cohérence d'un débat tout en laissant une liberté d'expression aux agents, et enfin un grand nombre d'expérimentations (sur des débats) permettant de tester différentes stratégies et de les évaluer en fonction de différents critèresIn this thesis multi-agent argumentation debates are studied. Our work is motivated by the issues which are raised when a large number of users interact and debate on the Web, by exchanging arguments on various topics. These issues are raised on the levels of representing the debating users' knowledge, representing the debate, computing the debate's conclusions, evaluating the debate's quality, defining specific protocols for user interaction, and studying debate strategies which users employ in order to achieve particular goals. This thesis' contribution consists in: a) proposing a way to model a multi-agent argumentation debate where the participants have different types of expertise, and proposing a way to aggregate their opinions; b) offering support to the agent who is arbitrating a debate, proposing a way to evaluate the quality of a debate on the basis of how confident we can be on its conclusions, and proposing solutions for improving the quality of a debate which lacks definite conclusions; c) offering support to the debating agents in order to determine which arguments they should put forward, studying dynamic argumentation systems, studying the potential ways in which an agent can influence a dynamic argumentation system in order to achieve his goal, studying the minimal change allowing an agent to achieve his goal, studying several argumentation strategies based on minimal change; d) defining, studying and evaluating multi-agent argumentation protocols, defining protocols of different types (1) based on numerical argument evaluation and (2) based on argument extensions, using different techniques to ensure a debate's coherence while ensuring some liberty of expression to the agents, and finally performing an important number of experiments (on debates) in order to test various strategies and evaluate them with respect to specific criteria
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Thorvaldsen, Øystein Espelid. "Geographical Location of Internet Hosts using a Multi-Agent System." Thesis, Norges Teknisk-Naturvitenskaplige Universitet, Institutt for datateknikk og informasjonsvitenskap, 2006. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-10145.
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This thesis focuses on a part of Internet forensics concerned with determining the geographic location of Internet hosts, also known as geolocation. Several techniques to geolocation exist. A classification of these techniques, and a comparative analysis of their properties is conducted. Based on this analysis several novel improvements to current techniques are suggested. As part of an earlier designed Multi-Agent Framework for Internet Forensics (MAFIF), an application implementing two active- measurement geolocation techniques is designed, implemented and tested. Experiments with the application are performed in the Uninett network, with the goal of identifying the impact of different network properties on geolocation. What most clearly set this thesis apart from earlier work, in addition to the use of a multi-agent system, is the analysis of the impact of IPv6 on geolocation, and the introduction of multi-party computation to geolocation. The extensive focus on delay measurements, although not bringing anything new to the field of networking in general, is also new to geolocation as far as we know.
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Khan, Basit Ahmed. "Applying Multi-Agent Software System to Support Citywide Mobile Learning." Doctoral thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for datateknikk og informasjonsvitenskap, 2011. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-15969.
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Mobile Learning is an emerging mode of learning, in which a learner can use his/her mobile device to learn anywhere and any time. The immature and diverse field of Mobile Learning holds a blooming future and promises great benefits for the learners. Therefore, both researchers as well the industry are experimenting with different applications of Mobile Learning through pilot projects to evaluate its effectiveness. Citywide Mobile Learning is a specialized form of Mobile Learning, in which a mobile learner can use his/her mobile device to learn, while [s]he is moving around in the city. To provide technological support for such form of learning, sophisticated supporting systems are required. A major challenge is the dynamic environment of cities that consist of mobile learners and a number of locations. A system designed to provide support for Citywide Mobile Learning shall be constructed using technological components that can manage the dynamic environment. In this thesis, our main goal is to provide support for Citywide Mobile Learning where the main subject of learning is to learn about the city by being in it. To reach this goal we overview the patchy literature of Mobile Learning to extract central characteristics of Mobile Learning in general and Citywide Mobile Learning in particular. To organize and analyze different locations in the city we adopt the theoretical notions of Space, Place and Learning-Experience. These theoretical notions are mapped into a Multi-Agent framework called AGORA. AGORA is extended to provide specialized support for Citywide Mobile Learning. Based on the important characteristics of Citywide Mobile Learning two important technological artefacts are derived. Firstly, a framework consisting of Service-Model and AGORA based Multi-Agent System is created. Secondly, an ontology is created that attempts to capture all the concepts and relationships relevant for Citywide Mobile Learning. More particular contributions of this thesis are as follows: C1: Providing a framework for supporting mobile learning in a citywide context C2: Using the philosophical concept of Place to structure and organize different locations in the city to support mobile learning C3: Applying the theories related to Place and Experience into practice by extending Multi- Agent framework called AGORA C4: Representing the concepts related to Space/Place based mobile learning in the form of ontology. This ontology captures the knowledge related to Mobile User, Learning Groups, Learning Space/Place, and Learning-Tasks C5: Identifying the core patterns of Citywide Mobile Learning
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Olsson, Fredrik. "A Multi-Agent System for playing the board game Risk." Thesis, Blekinge Tekniska Högskola, Avdelningen för programvarusystem, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-3780.
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Risk is a game in which traditional Artificial-Intelligence methods such as for example iterative deepening and Alpha-Beta pruning can not successfully be applied due to the size of the search space. Distributed problem solving in the form of a multi-agent system might be the solution. This needs to be tested before it is possible to tell if a multi-agent system will be successful at playing Risk or not. In this thesis the development of a multi-agent system that plays Risk is explained. The system places an agent in every country on the board and uses a central agent for organizing communication. An auction mechanism is used for negotiation. The experiments show that a multi-agent solution indeed is a prosperous approach when developing a computer based player for the board game Risk.I brädspelet Risk är det svårt att använda traditionella Artificiell-Intelligens-metoder eftersom sökrymden är extremt stor. Lösningen till detta kan vara att använda distribuerad problemlösning i form av ett multi-agent system. Detta måste testas innan man kan säga om ett multi-agent system är framgångsrikt, eller ej, i att spela Risk. Denna uppsats går igenom utvecklingen av ett multi-agent system som spelar Risk. Systemet placerar en agent i varje land på brädet och använder en central agent för att organisera kommunikationen. En auktionsmekanism används vid förhandlingar. Experimenten visar att ett multi-agent system är en framgångsrik infallsvinkel vid utveckling av en datorbaserad spelare för brädspelet Risk.
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Tang, Hon-ping. "A hybrid multi-agent system architecture for manufacturing cell control." Click to view the E-thesis via HKUTO, 2005. http://sunzi.lib.hku.hk/HKUTO/record/B38628727.
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Kato, Daichi, Kousuke Sekiyama, and Toshio Fukuda. "Risk management system based on uncertainty estimation by multi-agent." IEEE, 2009. http://hdl.handle.net/2237/13895.
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Cui, Hao. "Learning based multi-agent conceptual ship design decision support system." Thesis, University of Strathclyde, 2010. http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=14372.
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Hossack, John A. "A multi-agent system for automated post-fault disturbance analysis." Thesis, University of Strathclyde, 2005. http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=21606.
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Within today's privatised electricity industry, post-fault disturbance analysis is becoming an increasingly challenging prospect for protection engineers. Not only must they be proficient at operating a diverse range of data gathering tools but they must also be able to spend the time necessary to interpret the large volumes of data generated by modern network monitoring devices. Although a degree of automated assistance is provided by existing intelligent decision support tools, it remains for the protection engineer to manually collate and interpret the output of each system in order to compile a comprehensive understanding of each disturbance. As detailed in this thesis, the requirement for manual intervention has been eliminated through the development of the Protection Engineering Diagnostic Agents (PEDA) decision support architecture capable of automating all aspects of post-fault disturbance analysis. An essential component within this architecture is an alarm processor developed specifically to assist protection engineers with the early stages of post-fault disturbance analysis. The novel reasoning methodology employed emulates a protection engineer's approach to alarm analysis, providing automatic identification of transmission system disturbances and events. PEDA achieves fully automated post-fault disturbance analysis through the novel use of Multi-Agent Systems (MAS) to integrate the alarm processor with other automated systems for fault record retrieval, fault record interpretation and protection validation. As will be described in the thesis, achieving systems integration using MAS provides for levels of architecture flexibility and extensibility not previously realised within existing integrated decision support architectures. The PEDA architecture was developed following a comprehensive eleven stage methodology created as part of the reported research to assist with the specification of MAS for decision support within the power industry. Each stage of the PEDA specification process is detailed together with its implementation. Finally, the implemented architecture has been shown to offer automated retrieval, interpretation, collation and archiving of disturbance information within five minutes of a disturbance occurring. The beneficiaries of this near real-time provision of disturbance information need not be limited to protection engineers.
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Tang, Hon-ping, and 鄧漢平. "A hybrid multi-agent system architecture for manufacturing cell control." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2005. http://hub.hku.hk/bib/B38628727.
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Motz, E. de S. "Time granularity in simulation models within a multi-agent system." Thesis, University of Edinburgh, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.659668.
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The understanding of how processes in natural phenomena interact at different scales of time has been a great challenge for humans. How information is transferred across scale is fundamental if one tries to scale up from finer to coarse levels of granularity. Computer simulation has been a powerful tool to determine the appropriate amount of detail one has to impose when developing simulation models of such phenomena. However, it has been proved to be difficult to represent change at many scales of time and subject to cyclical processes. This issue has received little attention in traditional AI work on temporal reasoning but it becomes important in more complex domains, such as ecological modelling. Traditionally, models of ecosystems have been developed in imperative languages. Very few of those temporal logic theories have been used to the specification of simulation models in ecology. The aggregation of processes working at different scales of time is very difficult (sometimes impossible) to do reliably. The reason is because these processes influence each other, and their functionality does not always scale to other levels. Thus the problems to tackle are representing cyclical and interacting processes at many scales and to provide a framework to make the integration of such processes more reliable. We propose a framework for temporal modelling which allows modellers to represent cyclical and interacting processes at many scales. This theory combines both aspects by means of modular temporal classes and an underlying special temporal unification algorithm. To allow integration of different models they are developed as agents to run within a certain range of autonomy in a multi-agent system architecture. This Ecoagency framework is evaluated on ecological modelling problems and compared to a formal language for describing ecological systems.
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Nagi, Khaled [Verfasser]. "Transactional agents : towards a robust multi-agent system / K. Nagi." Berlin, 2001. http://d-nb.info/965521001/34.
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Saeedi, P. "Self-organised multi agent system for search and rescue operations." Thesis, University College London (University of London), 2010. http://discovery.ucl.ac.uk/147198/.
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Autonomous multi-agent systems perform inadequately in time critical missions, while they tend to explore exhaustively each location of the field in one phase with out selecting the pertinent strategy. This research aims to solve this problem by introducing a hierarchy of exploration strategies. Agents explore an unknown search terrain with complex topology in multiple predefined stages by performing pertinent strategies depending on their previous observations. Exploration inside unknown, cluttered, and confined environments is one of the main challenges for search and rescue robots inside collapsed buildings. In this regard we introduce our novel exploration algorithm for multi–agent system, that is able to perform a fast, fair, and thorough search as well as solving the multi–agent traffic congestion. Our simulations have been performed on different test environments in which the complexity of the search field has been defined by fractal dimension of Brownian movements. The exploration stages are depicted as defined arenas of National Institute of Standard and Technology (NIST). NIST introduced three scenarios of progressive difficulty: yellow, orange, and red. The main concentration of this research is on the red arena with the least structure and most challenging parts to robot nimbleness.
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Cardoso, Rafael Cau? "Integrating automated planning with a multi-agent system development framework." Pontif?cia Universidade Cat?lica do Rio Grande do Sul, 2014. http://tede2.pucrs.br/tede2/handle/tede/5274.
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Previous issue date: 2014-03-21Planejamento automatizado ? uma capacidade importante de se ter em agentes inteligentes. J? foi realizada uma extensa pesquisa em planejamento para um ?nico agente, por?m planejamento multiagente ainda n?o foi totalmente explorado, principalmente por causa do alto custo computacional encontrado nos algoritmos para planejamento multiagente. Com o aumento na disponibilidade e o avan?o t?cnol?gico de sistemas distribu?dos, e mais recentemente de processadores multin?cleos, novos algoritmos de planejamento multiagente tem sido desenvolvidos, como por exemplo o algoritmo MAP-POP, que neste trabalho ? integrado com o framework de sistemas multiagente JaCaMo. Este trabalho fornece capacidades para planejamento multiagente offline como parte de um framework para desenvolvimento de sistemas multiagentes. Esse framework suporta problemas multiagente complexos baseados em programa??o orientada a agentes. Em s?ntese, a principal contribui??o deste trabalho ? fornecer aos desenvolvedores uma implementa??o inicial do sistema multiagente para um determinado cen?rio, baseado nas solu??es encontradas pelo planejador MAP-POP, a qual pode aindar ser expandida pelo desenvolvedor para se tornar um sistema multiagente completo e bem desenvolvido.
Automated planning is an important capability to have in intelligent agents. Extensive research has been done in single-agent planning, but so far planning has not been fully explored in multiagent systems because of the computational costs of multi-agent planning algorithms. With the increasing availability of distributed systems and more recently multi-core processors, several new multi-agent planning algorithms have been developed, such as the MAP-POP algorithm, which we integrate into the JaCaMo multi-agent system framework. Our work provides offline multi-agent planning capabilities as part of a multi-agent system development framework. This framework supports complex multi-agent problems based on agent-oriented programming. In summary, the main contribution of this work is to provide the developers with an initial multiagent system implementation for a target scenario, based on the solutions found by the MAPPOP multi-agent planner, and on which the developer can work further towards a fully-fledged multi-agent system.
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Cardoso, Rafael Cauê. "Integrating automated planning with a multi-agent system development framework." Pontifícia Universidade Católica do Rio Grande do Sul, 2014. http://hdl.handle.net/10923/7044.
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Previous issue date: 2014Automated planning is an important capability to have in intelligent agents. Extensive research has been done in single-agent planning, but so far planning has not been fully explored in multiagent systems because of the computational costs of multi-agent planning algorithms. With the increasing availability of distributed systems and more recently multi-core processors, several new multi-agent planning algorithms have been developed, such as the MAP-POP algorithm, which we integrate into the JaCaMo multi-agent system framework. Our work provides offline multi-agent planning capabilities as part of a multi-agent system development framework. This framework supports complex multi-agent problems based on agent-oriented programming. In summary, the main contribution of this work is to provide the developers with an initial multiagent system implementation for a target scenario, based on the solutions found by the MAPPOP multi-agent planner, and on which the developer can work further towards a fully-fledged multi-agent system.
Planejamento automatizado é uma capacidade importante de se ter em agentes inteligentes. Já foi realizada uma extensa pesquisa em planejamento para um único agente, porém planejamento multiagente ainda não foi totalmente explorado, principalmente por causa do alto custo computacional encontrado nos algoritmos para planejamento multiagente. Com o aumento na disponibilidade e o avanço técnológico de sistemas distribuídos, e mais recentemente de processadores multinúcleos, novos algoritmos de planejamento multiagente tem sido desenvolvidos, como por exemplo o algoritmo MAP-POP, que neste trabalho é integrado com o framework de sistemas multiagente JaCaMo. Este trabalho fornece capacidades para planejamento multiagente offline como parte de um framework para desenvolvimento de sistemas multiagentes. Esse framework suporta problemas multiagente complexos baseados em programação orientada a agentes. Em síntese, a principal contribuição deste trabalho é fornecer aos desenvolvedores uma implementação inicial do sistema multiagente para um determinado cenário, baseado nas soluções encontradas pelo planejador MAP-POP, a qual pode aindar ser expandida pelo desenvolvedor para se tornar um sistema multiagente completo e bem desenvolvido.