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Book Description
Ce mémoire propose diverses méthodes originales basées sur l'analyse qualitative d'un bond-graph. La première est consacrée à l'affectation automatique de la causalité. Elle présente une grande convivialité et une souplesse d'utilisation, et prend en compte les difficultés classiquement rencontrées dans un bond-graph (causalités dérivées, boucles algébriques). Elle se prête particulièrement à l'analyse des propriétés structurelles du modèle. Des algorithmes sont proposés dans le but de déterminer les informations causales nécessaires à l'exploitation de la méthodologie bond-graph. Une autre méthode concerne la détermination de l'équation d'état sous forme d'expressions formelles. Elle est intitulée «Méthode des Boucles et Chemins Causaux» (MBCC). Elle se fonde uniquement sur le parcours et l'analyse des chemins causaux et des boucles causales. La MBCC présente l'originalité de traiter à la fois les boucles algébriques entre des éléments dissipatifs et la causalité dérivée. Cette méthode est applicable pour certaines classes de systèmes non linéaires et pour des éléments multiports. Ces différentes méthodes ont contribué à la réalisation d'un logiciel d'aide à la modélisation des systèmes dynamiques : ARCHER. Sa philosophie ainsi que sa spécificité sont exposées et détaillées. ARCHER est réalisé selon les concepts de la programmation orientée objet et utilise les techniques de l'Intelligence Artificielle
Book Description
Ce mémoire propose diverses méthodes originales basées sur l'analyse qualitative d'un bond-graph. La première est consacrée à l'affectation automatique de la causalité. Elle présente une grande convivialité et une souplesse d'utilisation, et prend en compte les difficultés classiquement rencontrées dans un bond-graph (causalités dérivées, boucles algébriques). Elle se prête particulièrement à l'analyse des propriétés structurelles du modèle. Des algorithmes sont proposés dans le but de déterminer les informations causales nécessaires à l'exploitation de la méthodologie bond-graph. Une autre méthode concerne la détermination de l'équation d'état sous forme d'expressions formelles. Elle est intitulée «Méthode des Boucles et Chemins Causaux» (MBCC). Elle se fonde uniquement sur le parcours et l'analyse des chemins causaux et des boucles causales. La MBCC présente l'originalité de traiter à la fois les boucles algébriques entre des éléments dissipatifs et la causalité dérivée. Cette méthode est applicable pour certaines classes de systèmes non linéaires et pour des éléments multiports. Ces différentes méthodes ont contribué à la réalisation d'un logiciel d'aide à la modélisation des systèmes dynamiques : ARCHER. Sa philosophie ainsi que sa spécificité sont exposées et détaillées. ARCHER est réalisé selon les concepts de la programmation orientée objet et utilise les techniques de l'Intelligence Artificielle
Author: Söhnke M. Bartram Publisher: CFA Institute Research Foundation ISBN: 195292703X Category : Business & Economics Languages : en Pages : 95
Book Description
Artificial intelligence (AI) has grown in presence in asset management and has revolutionized the sector in many ways. It has improved portfolio management, trading, and risk management practices by increasing efficiency, accuracy, and compliance. In particular, AI techniques help construct portfolios based on more accurate risk and return forecasts and more complex constraints. Trading algorithms use AI to devise novel trading signals and execute trades with lower transaction costs. AI also improves risk modeling and forecasting by generating insights from new data sources. Finally, robo-advisors owe a large part of their success to AI techniques. Yet the use of AI can also create new risks and challenges, such as those resulting from model opacity, complexity, and reliance on data integrity.
Author: Denise Pumain Publisher: Springer Science & Business Media ISBN: 1402041276 Category : Business & Economics Languages : en Pages : 248
Book Description
Hierarchy is a form of organisation of complex systems that rely on or produce a strong differentiation in capacity (power and size) between the parts of the system. It is frequently observed within the natural living world as well as in social institutions. According to the authors, hierarchy results from random processes, follows an intentional design, or is the result of the organisation which ensures an optimal circulation of energy for information. This book reviews ancient and modern representations and explanations of hierarchies, and compares their relevance in a variety of fields, such as language, societies, cities, and living species. It throws light on concepts and models such as scaling laws, fractals and self-organisation that are fundamental in the dynamics and morphology of complex systems. At a time when networks are celebrated for their efficiency, flexibility and better social acceptance, much can be learned about the persistent universality and adaptability of hierarchies, and from the analogies and differences between biological and social organisation and processes. This book addresses a wide audience of biologists and social scientists, as well as managers and executives in a variety of institutions.
Author: Florian Jaton Publisher: MIT Press ISBN: 0262542145 Category : Computers Languages : en Pages : 401
Book Description
A laboratory study that investigates how algorithms come into existence. Algorithms--often associated with the terms big data, machine learning, or artificial intelligence--underlie the technologies we use every day, and disputes over the consequences, actual or potential, of new algorithms arise regularly. In this book, Florian Jaton offers a new way to study computerized methods, providing an account of where algorithms come from and how they are constituted, investigating the practical activities by which algorithms are progressively assembled rather than what they may suggest or require once they are assembled.
Author: Kerstin Dautenhahn Publisher: Springer Science & Business Media ISBN: 0306473739 Category : Computers Languages : en Pages : 297
Book Description
Socially situated planning provides one mechanism for improving the social awareness ofagents. Obviously this work isin the preliminary stages and many of the limitation and the relationship to other work could not be addressed in such a short chapter. The chief limitation, of course, is the strong commitment to de?ning social reasoning solely atthe meta-level, which restricts the subtlety of social behavior. Nonetheless, our experience in some real-world military simulation applications suggest that the approach, even in its preliminary state, is adequate to model some social interactions, and certainly extends the sta- of-the art found in traditional training simulation systems. Acknowledgments This research was funded by the Army Research Institute under contract TAPC-ARI-BR References [1] J. Gratch. Emile: Marshalling passions in training and education. In Proceedings of the Fourth International Conference on Autonomous Agents, pages 325–332, New York, 2000. ACM Press. [2] J. Gratch and R. Hill. Continous planning and collaboration for command and control in joint synthetic battlespaces. In Proceedings of the 8th Conference on Computer Generated Forces and Behavioral Representation, Orlando, FL, 1999. [3] B. Grosz and S. Kraus. Collaborative plans for complex group action. Arti?cial Intelli gence, 86(2):269–357, 1996. [4] A. Ortony, G. L. Clore, and A. Collins. The Cognitive Structure of Emotions. Cambridge University Press, 1988. [5] R.W.PewandA.S.Mavor,editors. Modeling Human and Organizational Behavior. National Academy Press, Washington D.C., 1998.
Author: S.G. Tzafestas Publisher: Springer Science & Business Media ISBN: 9401125260 Category : Technology & Engineering Languages : en Pages : 625
Book Description
Robotics is a modern interdisciplinary field that has emerged from the marriage of computerized numerical control and remote manipulation. Today's robotic systems have intelligence features, and are able to perform dexterous and intelligent human-like actions through appropriate combination of learning, perception, planning, decision making and control. This book presents advanced concepts, techniques and applications reflecting the experience of a wide group of specialists in the field. Topics include: kinematics, dynamics, path planning and tracking, control, mobile robotics, navigation, robot programming, and sophisticated applications in the manufacturing, medical, and other areas.
Author: Bernhard Ganter Publisher: Springer ISBN: 354044663X Category : Computers Languages : en Pages : 580
Book Description
Computerscientistscreatemodelsofaperceivedreality.ThroughAItechniques, these models aim at providing the basic support for emulating cognitive - havior such as reasoning and learning, which is one of the main goals of the AI research e?ort. Such computer models are formed through the interaction of various acquisition and inference mechanisms: perception, concept learning, conceptual clustering, hypothesis testing, probabilistic inference, etc., and are represented using di?erent paradigms tightly linked to the processes that use them. Among these paradigms let us cite: biological models (neural nets, genetic programming), logic-based models (?rst-order logic, modal logic, rule-based s- tems), virtual reality models (object systems, agent systems), probabilistic m- els(Bayesiannets,fuzzylogic),linguisticmodels(conceptualdependencygraphs, language-based representations), etc. OneofthestrengthsoftheConceptualGraph(CG)theoryisitsversatilityin terms of the representation paradigms under which it falls. It can be viewed and therefore used, under di?erent representation paradigms, which makes it a p- ular choice for a wealth of applications. Its full coupling with di?erent cognitive processes lead to the opening of the ?eld toward related research communities such as the Description Logic, Formal Concept Analysis, and Computational Linguistic communities. We now see more and more research results from one community enrich the other, laying the foundations of common philosophical grounds from which a successful synergy can emerge.
Author: Abdellah Azmani
Author: Abdellah Azmani
Author: José Joaquin Granda
Author: José Joaquin Granda
Author: Söhnke M. Bartram
Author: Denise Pumain
Author: Florian Jaton
Author: Kerstin Dautenhahn
Author: S.G. Tzafestas
Author: 
Author: Bernhard Ganter