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6th International Workshop on Uncertainty Reasoning for the Semantic Web, URSW 2010, Held as Part of the 9th International Semantic Web Conferences, ISWC 2010 and 1st International Workshop on Uncertainty in Description Logics, UniDL2010

作者： Bobillo, Fernando Delgado, Miguel Gómez-Romero, Juan Dpt. of Computer Science and Systems Engineering University of Zaragoza Spain Dpt. of Computer Science and Artificial Intelligence University of Granada Spain Applied Artificial Intelligence Group University Carlos III Madrid Spain

ISBN: (纸本)9783642359743

Classical ontologies are not suitable to represent imprecise or vague information, which has led to several extensions using non-classical logics. In particular, several fuzzy extensions have been proposed in the literature. In this paper, we present the fuzzy ontology reasoner DeLorean, the first to support a fuzzy extension of OWL 2. We discuss how to use it for fuzzy ontology representation and reasoning, and describe some implementation details and optimization techniques. An empirical evaluation demonstrates that these optimizations considerably improve the performance of the reasoner. © 2013 Springer-Verlag Berlin Heidelberg.

关键词： Ontology

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Grid computing and CBR deployment: Monitoring principles for a suitable engagement

Grid computing and CBR deployment: Monitoring principles for...

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9th International Conference on Distributed Computing and Artificial Intelligence, DCAI 2012

作者： Castillo, Luis F. Isaza, Gustavo Bedia, Manuel Glez Aguilera, Miguel Correa, Juan David Universidad Nacional de Colombia Industrial Engineering Dpt. Bogotá Colombia Universidad de Caldas Computer Science and Systems Engineering Dpt. Manizales Colombia Universidad de Zaragoza Computer Science Dpt. Saragossa Spain Universidad Autónoma de Manizales Systems Engineering Manizales Colombia

ISBN: (纸本)9783642287640

This paper presents a mathematical technique for modeling the generation of Grid-solutions employing a Case based reasoning system (CBR). Roughly speaking, an intelligent system that tries to be adapted to highly dynamic environment needs an efficient integration of high-level processes (deliberative and time-costly) within low-level (reactive, faster but poorer in quality) processes. The most relevant aspect of our current approach is that, unexpectedly, the performance of the CBR-system do not get worse any time that it retrieves worse cases in situations even when it has enough time to generate better solutions. We concentrate on formal aspects of the proposed Grid-CBR system without establishing which should be the most adequate procedure in a subsequent implementation stage. The advantage of the presented scheme is that it does not depend on neither the particular problem nor a concrete environment. It consists in a formal approach that only requires, on one hand, local information about the averaged-time spent by the system in obtaining a solution and, on the other hand, an estimation about their temporal restrictions. The potential use of industry standard technologies to implement such a Grid-enabled CBR system is discussed here too. © 2012 Springer-Verlag.

关键词： Grid computing

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External localization system for mobile robotics

External localization system for mobile robotics

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International Conference on Advanced Robotics (ICAR)

作者： Tomáš Krajník Matías Nitsche Jan Faigl Tom Duckett Marta Mejail Libor Přeučil University of Lincoln Lincoln Lincolnshire GB Lab. of Robotics and Emb. Systems Univ. of Buenos Aires Argentina Dpt. of Computer Science and Engineering FEE Czech Technical Univ. in Prague Lincoln Centre for Autonomous Systems Univ. of Lincoln United Kingdom Intelligent and Mobile Robotics Group FEE Czech Technical Univ. in Prague

We present a fast and precise vision-based software intended for multiple robot localization. The core component of the proposed localization system is an efficient method for black and white circular pattern detection. The method is robust to variable lighting conditions, achieves sub-pixel precision, and its computational complexity is independent of the processed image size. With off-the-shelf computational equipment and low-cost camera, its core algorithm is able to process hundreds of images per second while tracking hundreds of objects with millimeter precision. We propose a mathematical model of the method that allows to calculate its precision, area of coverage, and processing speed from the camera's intrinsic parameters and hardware's processing capacity. The correctness of the presented model and performance of the algorithm in real-world conditions are verified in several experiments. Apart from the method description, we also publish its source code; so, it can be used as an enabling technology for various mobile robotics problems.

关键词： Cameras Three-dimensional displays Robots Mathematical model Estimation Equations Detectors

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SSME Curricula: An Overview

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Physics Procedia 2012年 33卷 228-235页

作者： Gianmario Motta Thiago Barroero Giovanni Pignatelli DIS (Dpt of Computer Engineering and Systems Science) University of Pavia Pavia Italy Xiaofei Xu Harbin Institute of Technology Harbin China

Services science (SSME) is a reality. After the 2006 manifesto published by Communications of ACM several universities are launching SSME curricula. In order to give a well founded overview of SSME and related curricula, we first address SSME scope issues. Later on we summarize the main contents of the curriculum and particularly the learning approach in the core classes. As case studies, we describe the SSME curriculum of University of Peking and University of Pavia. Finally we consider results. Graduate service engineers are designers of IT-enabled services who know how to analyze and design business service chains and to identify, customize and integrate appropriate IT modules. Differently from traditional IT engineers, service engineers use a critical value based approach with a faster and comprehensive analysis

关键词： Service sciences SSME Services engineering engineering Education Information Analysis Business Process Analysis Business Process Design Business Process Modeling

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Right sizing customer care: An approach for sustainable service level agreements

Right sizing customer care: An approach for sustainable serv...

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2011 International Joint Conference on Service sciences, IJCSS 2011

作者： Barroero, Thiago Motta, Gianmario Della Vedova, Marco Computer Engineering and Systems Science Dpt University of Pavia Pavia Italy

ISBN: (纸本)9780769544212

Call centers operational models size staff by balancing service quality and efficiency. Classic models consider only the case of dedicated staff. We propose a model for right sizing shared staff, thus extending the classical Erlang C by using the Gamma incomplete function. This model has a wider coverage and support flexible configurations as required by emerging markets and, furthermore, it enables transparent pricing against a certified service level. © 2011 IEEE.

关键词： Quality of service

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Design of performance aware service systems: A conceptual framework and a case study

Design of performance aware service systems: A conceptual fr...

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2011 International Joint Conference on Service sciences, IJCSS 2011

作者： Motta, Gianmario Barroero, Thiago Telese, Ivo Computer Engineering and Systems Science Dpt University of Pavia Pavia Italy

ISBN: (纸本)9780769544212

We identify key elements of an ideal paradigm for service systems (SS): execution architecture, functional layers, execution dynamic and design approach. The critical service elements are (a) a control layer that enables the customer to compose, monitor and modify service and (b) compensation actions. To exemplify the distinctive characteristics of SS we consider the case of a travel control layer, that shows how the SS paradigm could be implemented even on the top of traditional architectures. © 2011 IEEE.

关键词： Information management

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Fuzzy ontologies and fuzzy integrals

Fuzzy ontologies and fuzzy integrals

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2011 11th International Conference on Intelligent systems Design and Applications, ISDA'11

作者： Bobillo, Fernando Straccia, Umberto Dpt. of Computer Science and Systems Engineering University of Zaragoza Spain ISTI - CNR Pisa Italy

ISBN: (纸本)9781457716751

Fuzzy ontologies extend classical ontologies to allow the representation of imprecise and vague knowledge. Although a relatively important amount of work has been carried out in the last years and they have been successfully used in several applications, several notions from fuzzy logic, such as fuzzy integrals, have not been considered yet in fuzzy ontologies. In this work, we show how to support fuzzy integrals in fuzzy ontologies. As a theoretical formalism, we provide the syntax and semantics of a fuzzy Description Logic with fuzzy integrals. We also provide a reasoning algorithm for a family of fuzzy integrals and show how to encode them into the language Fuzzy OWL 2. © 2011 IEEE.

关键词： Fuzzy logic

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A comparable study employing weka clustering/classification algorithms for web page classification

A comparable study employing weka clustering/classification ...

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15th Panhellenic Conference on Informatics, PCI 2011

作者： Charalampopoulos, Ioannis Anagnostopoulos, Ioannis Dpt of Inf. and Comm. Systems Engineering University of Aegean Karlovassi Samos island Greece Dpt of Computer Science and Biomedical Informatics University of Central Greece Lamia Greece

ISBN: (纸本)9780769543895

Documents and web pages share many similarities. Thus classification methods used in documents can be applied to advanced web content, with or even without modifications. Algorithms for document and web classification are presented as an introduction. One out of many tools that can be used in method evaluation, application and modification is WEKA (Waikato Environment for Knowledge Analysis). Testing results and conclusions strengthen the principles and bases of classification, while demonstrating the need for a new interlayer in the evaluation of classification methods. © 2011 IEEE.

关键词： Websites

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Tractability of the crisp representations of tractable fuzzy description logics

Tractability of the crisp representations of tractable fuzzy...

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6th International Workshop on Uncertainty Reasoning for the Semantic Web, URSW 2010 - Collocated with the 9th International Semantic Web Conference, ISWC 2010

作者： Bobillo, Fernando Delgado, Miguel Dpt. of Computer Science and Systems Engineering University of Zaragoza Spain Dpt. of Computer Science and Artificial Intelligence University of Granada Spain

An important line of research within the field of fuzzy DLs is the computation of an equivalent crisp representation of a fuzzy ontology. In this short paper, we discuss the relation between tractable fuzzy DLs and tr... 详细信息

关键词： Data description

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Finite fuzzy description logics: A crisp representation for finite fuzzy ALCH

Finite fuzzy description logics: A crisp representation for ...

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6th International Workshop on Uncertainty Reasoning for the Semantic Web, URSW 2010 - Collocated with the 9th International Semantic Web Conference, ISWC 2010

作者： Bobillo, Fernando Straccia, Umberto Dpt. of Computer Science and Systems Engineering University of Zaragoza Spain Pisa Italy

Fuzzy Description Logics (DLs) are a formalism for the representation of structured knowledge affected by imprecision or vagueness. In the setting of fuzzy DLs, restricting to a finite set of degrees of truth has proved to be useful. In this paper, we propose finite fuzzy DLs as a generalization of existing approaches. We assume a finite totally ordered set of linguistic terms or labels, which is very useful in practice since expert knowledge is usually expressed using linguistic terms. Then, we consider any smooth t-norm defined over this set of degrees of truth. In particular, we focus on the finite fuzzy DL ALCH, studying some logical properties, and showing the decidability of the logic by presenting a reasoning preserving reduction to the non-fuzzy case.

关键词： Data description

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