Diagnosis Of Active Systems

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Diagnosis Of Active Systems

Author : G. Lamperti
ISBN : 9789401702577
Genre : Computers
File Size : 48.47 MB
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This book is about model-based diagnosis of a class of discrete-event systems called active systems. Roughly, model-based diagnosis is the task of finding out the faulty components of a physical system based on the observed behavior and the system model. An active system is the abstraction of a physical artefact that is modeled as a network of com municating automata. For example, the protection apparatus of a power transmission network can be conveniently modeled as an active system, where breakers, protection devices, and lines are naturally described by finite state machines. The asynchronous occurrence of a short circuit on a line or a bus-bar causes the reaction of the protection devices, which aims to isolate the shorted line. This reaction can be faulty and several lines might be eventually isolated, rather than the shorted line only. The diagnostic problem to be solved is uncovering the faulty devices based the visible part of the reaction. Once the diagnosis task has been on accomplished, the produced results are exploited to fix the apparatus (and also to localize the short circuit, in this sample case). Interestingly, the research presented in this book was triggered a decade ago by a project 011 short circuit localization, conducted by ENEL, the Italian electricity board, along with other industrial and academic European partners.
Category: Computers

Introduction To Diagnosis Of Active Systems

Author : Gianfranco Lamperti
ISBN : 9783319927336
Genre : Computers
File Size : 73.32 MB
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This book is an up-to-date self-contained compendium of the research carried out by the authors on model-based diagnosis of a class of discrete-event systems called active systems. After defining the diagnosis problem, the book copes with a variety of reasoning mechanisms that generate the diagnosis, possibly within a monitoring setting. The book is structured into twelve chapters, each of which has its own introduction and concludes with bibliographic notes and itemized summaries. Concepts and techniques are presented with the help of numerous examples, figures, and tables, and when appropriate these concepts are formalized into propositions and theorems, while detailed algorithms are expressed in pseudocode. This work is primarily intended for researchers, professionals, and graduate students in the fields of artificial intelligence and control theory.
Category: Computers

Far Sighted Diagnosis Of Active Systems

Author : Roberto Garatti
ISBN : OCLC:228030144
Genre :
File Size : 82.53 MB
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Active systems are a class of discrete-event systems modeled as networks of non-deterministic automata communicating through either synchronous or asynchronous connection links. The model-based diagnosis of an active system is carried out by first reconstructing its behavior based on the observation, from which faults are later derived. The complexity of behavior reconstruction is exacerbated by the possibility of queuing events within links, thereby making essential the simulation of the order in which events are buffered within links. Unfortunately some sequences of events may lead to blind alleys in the search space. This is especially critical if events exchanged among components are assumed to be uncertain, as the number of alternative sequences of queued events is still larger. Therefore, behavior reconstruction without any prospection in the search space is generally bound to detrimental backtracking. To make diagnosis of active systems more efficient, we present an off-line technique for processing the models inherent to the system at hand so as to automatically generate prospection knowledge relevant to the mode in which events are produced and consumed over links. Such a knowledge is then exploited on-line, when the diagnostic engine is running, to guide the search process, thus reducing both time and space.

Advances In Automotive Control 2001

Author : International Federation of Automatic Control
ISBN : UOM:39015053761568
Genre : Technology & Engineering
File Size : 84.12 MB
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This Proceedings contains the papers presented at the Third IFAC Workshop on "ADVANCES IN AUTOMOTIVE CONTROL" held in Karlsruhe, Germany, on 28-30 March 2001. As the subject indicates, the aim of this workshop was to discuss not only the latest advances related to motor vehicles, but also, and more generally, to exchange ideas between academic partners, car manufacturers and subcontractors. The plenary lectures are of great importance and the thematic sessions in the different sections are the essence of such workshops. However, the discussions between experts in the different fields, the meetings between people from industry, universities and public or private laboratories, as well as the resulting exchange of ideas, are as important. Research is often criticized for providing merely theoretical results and for the insufficient number of its applications. The motor vehicle industry offers a wide field of applications in which we can validate all techniques, tools and methods. This allows us to be involved in all the areas of fundamental research, in all the different possible approaches from fundamental research to technology transfer, and to observe the actual effects of our results. The increase in road traffic was a major problem of the last century. It is clear that one of the challenges of the XXIst century will be to improve driving safety and comfort. The sessions in the Proceedings volume are divided as follows: Driveline control, Driveline modelling, Vehicle dynamics (I and II), Electronic architecture, Intelligent components, Engine control (I and II), Engine modelling, Modelling of combustion and turbo-charging, Diagnostics and Subsystems. The quality of the papers and the diversity of their origins clearly show the interest taken in this key sector of our research and industry.
Category: Technology & Engineering

Advances In Artificial Intelligence

Author : Canadian Society for Computational Studies of Intelligence. Conference
ISBN : UOM:39015058751663
Genre : Artificial intelligence
File Size : 29.29 MB
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Category: Artificial intelligence

Ecai 2010

Author : Helder Coelho
ISBN : 9781607506058
Genre : Computers
File Size : 67.3 MB
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Contains the proceedings of the nineteenth biennial European Conference on Artificial Intelligence (ECAI), which since 1974 has been Europe's principal opportunity for researchers to present and hear about the very best contemporary AI research in all its diverse forms and applications.
Category: Computers

Knowledge Based Systems For Test And Diagnosis

Author : Gabrièle Saucier
ISBN : UOM:39015016960984
Genre : Computers
File Size : 46.84 MB
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The introductory paper in this book gives an overview of the most significant attempts to use knowledge based systems for test and diagnosis. The overview includes: - systems which employ knowledge engineering - systems which employ frames and/or slots - systems which represent knowledge using some form of calculus - systems which attempt to imitate human expertise. Chapter I deals with test planning and text expertise, including AI aspects of designing testable chips, economic problems and the HITEST experience. Chapter II covers the most obvious application of AI techniques: knowledge based diagnosis. A survey paper looks at various systems, while the other papers report on practical experiences. Chapter III reports on rule based design verification and maintenance, the papers dealing with electrical verification of integrated circuits, board verification with an application in an industrial environment, and rule based maintenance.
Category: Computers

Chest Radiograph Scoring Systems For The Diagnosis Of Active Pulmonary Tuberculosis

Author : Lancelot Pinto
ISBN : OCLC:846796123
Genre :
File Size : 59.1 MB
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"Background: Chest radiography is often the only tool available for the investigation of tuberculosis (TB) suspects with negative sputum smears, thus playing a crucial role in clinical decision-making. However, chest radiographs lack specificity for TB, and their interpretation is subjective and not standardized, and therefore not highly reproducible.

Fault Diagnosis In Dynamic Systems

Author : Ron Patton
ISBN : UOM:39015015452694
Genre : Automatic control
File Size : 55.32 MB
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Concerned with monitoring techniques to detect, predict, isolate, identify, and correct malfunctions and failures of individual components within complex automatic systems used in industry and commerce. The approaches examined include parameter estimation, Markov modelling for threshold determinatio.
Category: Automatic control

Fault Diagnosis Of Digital Systems

Author : Herbert Y. Chang
ISBN : UOM:39015004498682
Genre : Electronic digital computers
File Size : 81.91 MB
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Category: Electronic digital computers