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检索条件"任意字段=7th International and Interdisciplinary Conference on Modeling and Using Context"

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Alpha, Betti and the Megaparsec universe: On the topology of the cosmic web

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7th international Symposium on Voronoi Diagrams

作者： Van De Weygaert, Rien Vegter, Gert Edelsbrunner, Herbert Jones, Bernard J. T. Pranav, Pratyush Park, Changbom Hellwing, Wojciech A. Eldering, Bob Kruithof, Nico Bos, E.G.P. Hidding, Johan Feldbrugge, Job Ten Have, Eline Van Engelen, Matti Caroli, Manuel Teillaud, Monique Kapteyn Astronomical Institute University of Groningen P.O. Box 800 9700 AV Groningen Netherlands Johann Bernoulli Institute for Mathematics and Computer Science University of Groningen P.O. Box 407 9700 AK Groningen Netherlands IST Austria Am Campus 1 3400 Klosterneuburg Austria School of Physics Korea Institute for Advanced Study Seoul 130-722 Korea Republic of Interdisciplinary Centre for Mathematical and Computational Modeling University of Warsaw ul. Pawinskiego 5a 02-106 Warsaw Poland Stratingh Institute for Chemistry University of Groningen Nijenborgh 4 9747 AG Groningen Netherlands Géométrica INRIA Sophia Antipolis-Méditerranée route des Lucioles 06902 Sophia Antipolis Cedex France

ISBN: (纸本)9783642252488

We study the topology of the Megaparsec Cosmic Web in terms of the scale-dependent Betti numbers, which formalize the topological information content of the cosmic mass distribution. While the Betti numbers do not fully quantify topology, they extend the information beyond conventional cosmological studies of topology in terms of genus and Euler characteristic. the richer information content of Betti numbers goes along the availability of fast algorithms to compute them. For continuous density fields, we determine the scale-dependence of Betti numbers by invoking the cosmologically familiar filtration of sublevel or superlevel sets defined by density thresholds. For the discrete galaxy distribution, however, the analysis is based on the alpha shapes of the particles. these simplicial complexes constitute an ordered sequence of nested subsets of the Delaunay tessellation, a filtration defined by the scale parameter, α. As they are homotopy equivalent to the sublevel sets of the distance field, they are an excellent tool for assessing the topological structure of a discrete point distribution. In order to develop an intuitive understanding for the behavior of Betti numbers as a function of α, and their relation to the morphological patterns in the Cosmic Web, we first study them within the context of simple heuristic Voronoi clustering models. these can be tuned to consist of specific morphological elements of the Cosmic Web, i.e. clusters, filaments, or sheets. To elucidate the relative prominence of the various Betti numbers in different stages of morphological evolution, we introduce the concept of alpha tracks. Subsequently, we address the topology of structures emerging in the standard LCDM scenario and in cosmological scenarios with alternative dark energy content. the evolution of the Betti numbers is shown to reflect the hierarchical evolution of the Cosmic Web. We also demonstrate that the scale-dependence of the Betti numbers yields a promising measure of co

关键词： Topology

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Towards a dynamic adaption of capacity in mobile telephony networks using context information

Towards a dynamic adaption of capacity in mobile telephony n...

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international conference on ITS Telecommunications (ITST)

作者： Sebastian Göndör Abdulbaki Uzun Axel Küpper Deutsche Telekom Laboratories TU Berlin Berlin Germany

As of today, components of radio access networks are operated in an always-on manner. Since network providers need to fulfill the traffic demands of all customers even during peak times to stay competitive, a significantly higher amount of network resources (i.e., bandwidth) is provided. By the end of 2010, Germany's mobile network providers operated more than 123.000 base stations which are available 24/7 - even when the provided resources are not required at this time. the total energy consumption of these base stations sums up to approx. 1455 GWh per year, inflicting not only high costs to the network operators, but also contributes to worldwide carbon dioxide emissions. context data, which is already present in the different network entities can be utilized to model the state of radio networks allowing network providers to identify idle components. these components can then be reconfigured dynamically according to the actual demands on connectivity in the network. In this paper, we propose a context Management Architecture, which is able to acquire and consolidate context from various components in radio access networks as well as additional external sources. the raw context data is sensed by special context Collection Agents, which are installed on the devices the context data is originating from. It is then published to context Managers, which provide functionality for storage, reasoning mechanisms, and provisioning of the context data. context-aware applications (e.g., an application capable of optimizing the configuration of radio networks) can access the refined context via appropriate interfaces for further processing.

关键词： context context modeling Optimization Mobile communication Mobile computing Computer architecture Radio access networks

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using Model Transformation to Generate Graphical Counter-Examples for the Formal Analysis of xUML Models

Using Model Transformation to Generate Graphical Counter-Exa...

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IEEE international conference on Engineering of Complex Computer Systems

作者： Osmar M. dos Santos Jim Woodcock Richard Paige Department of Computer Science University of York York UK

the INESS (Integrated European Signalling System) Project, funded by the FP7 programme of the European Union, aims to provide a common, integrated, railway signalling system within Europe. INESS experts have been using the Executable UML (xUML) language to model an executable specification of the proposed system. Due to safety-critical aspects of these systems, one key idea is to formally analyse them. In this context, we have been working with other universities on different translation-based methods that enable the formal verification of xUML models. At the core of this approach is a verification framework based on model transformation technology, used to implement an automatic and transparent verification method for xUML. Since a translation-based approach is used, a key aspect to achieve transparency is the automatic generation of counter-examples for verified properties that have a false result during the analysis, in terms of the original xUML model. We describe in this paper how we achieve this using model transformation technology.

关键词： Unified modeling language Analytical models Rail transportation Layout Europe Target tracking Syntactics

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Language modeling Approach for Retrieving Passages in Lecture Audio Data 7

Language Modeling Approach for Retrieving Passages in Lectur...

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7th international conference on Language Resources and Evaluation (LREC)

作者： Honda, Koichiro Akiba, Tomoyosi Toyohashi Univ Technol Dept Informat & Comp Sci Toyohashi Aichi Japan

ISBN: (纸本)9782951740860

Spoken Document Retrieval (SDR) is a promising technology for enhancing the utility of spoken materials. After the spoken documents have been transcribed by using a Large Vocabulary Continuous Speech Recognition (LVCSR) decoder, a text-based ad hoc retrieval method can be applied directly to the transcribed documents. However, recognition errors will significantly degrade the retrieval performance. To address this problem, we have previously proposed a method that aimed to fill the gap between automatically transcribed text and correctly transcribed text by using a statistical translation technique. In this paper, we extend the method by (1) using neighboring context to index the target passage, and (2) applying a language modeling approach for document retrieval. Our experimental evaluation shows that context information can improve retrieval performance, and that the language modeling approach is effective in incorporating context information into the proposed SDR method, which uses a translation model.

关键词： Semantics

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Process modeling and optimization of complex systems using Scattered context Grammars

Process modeling and optimization of complex systems using S...

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7th international conference on Engineering Computational Technology, ECT 2010

作者： Květoňová, Š. Kolář, D. Department of Information Systems University of Technology Brno Czech Republic

ISBN: (纸本)9781905088393

the aim of the paper is to present an application of Scattered context Grammars in order to simplify process management (better coordination, control and optimization of processes which are proceeding in Car Repair Business Case). Our approach is based on process management theory (principles and fundamentals) and its usage in formal languages theory/grammars. In particular, we demonstrate on an example coming from car repair stations that in-time planning may be handled in a feasible way and with local predictions of follow-up procedures. More specifically, dependencies and must-do-procedures can be solved and easily described in a compact way. © 2010 Civil-Comp Press.

关键词： Enterprise resource management

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Affective modeling of users in cognitive elements exercise program for design creativity enhancement

Affective modeling of users in cognitive elements exercise p...

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7th international conference on Design and Emotion 2010

作者： Kim, Yong Se Kim, Mee Shin, Yun Kyoung Park, Hyejung Henny Lee, In-Sook Creative Design Institute Sungkyunkwan University Suwon Korea Republic of Sejong University Seoul Korea Republic of

ISBN: (纸本)9780615406664

As an effort to provide students the opportunity in enhancing design creativity in a personalized adaptive manner, an exercise program that address cognitive elements of creativity has been devised so that personalized needs in specific elements could be addressed. Being an exercise for creativity, the contents are rather unusual as students first deal with the program. Learning involves both cognitive and affective aspects of learning users in interacting with learning contents and interface. A learning user model includes assessment information as well as understanding on learners both static and dynamic characteristics. While cognitive aspects of a learning user would be rather static, affective aspects are dynamic in its nature. In the context of computer-assisted learning context of creative design capabilities, affective modeling of learners is being done using self-reporting format. Affective elements composed of joy, acceptance, fear, surprise, sadness, dislike, anger, and interest are used in the affective modeling in a simple training exercises for cognitive elements of creativity. While students conduct the exercises, they are asked to self-report their affective state using a simple diagram. Also, the entire exercise session is captured with students all activities including their facial expressions. From the images of learners captured during their activities, a human coder will also be able to develop the affective model. We conducted an experiment with students in interdisciplinary, integrated design where the exercise program for cognitive creativity elements with self-reporting of affective states was assigned between two simple conceptual design tasks. the experiment result indicates that the learning effects for fluency, flexibility and originality have been significant. We expect this research will help understand the affective state change and its relation with learning progression in creativity education.

关键词： Students

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context-driven product knowledge modeling, description and sharing

Context-driven product knowledge modeling, description and s...

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2010 7th international conference on Fuzzy Systems and Knowledge Discovery, FSKD 2010

作者： Zhou, Jingtao Yang, HaiCheng Wang, Mingwei Zhao, Han Zhang, Shusheng Mo, Rong Northwestern Polytechnical University Xi'an China

ISBN: (纸本)9781424459346

Modern product development needs a large number of knowledge contained at all stages of product life cycle. In order to deal with the discrete, heterogeneous expression, scenario dependence of various types of product knowledge, a context-driven knowledge-sharing approach is presented, covering product knowledge modeling, describing and organizing. through building product knowledge context model, product knowledge is linked with the relevant generation and application scenarios. Based on the model, a template-based product knowledge description method is proposed. With analyzing the description results, a self-organization method is proposed for product knowledge organization. the context-driven knowledge-sharing approach which aims at discrete distributed environment, contains a wealth of context-sensitive scenario semantics, has self-organizing capacity, can effectively solving product knowledge sharing problems. ©2010 IEEE.

关键词： Semantics

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context-based ontology matching: Concept and application cases

Context-based ontology matching: Concept and application cas...

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10th IEEE international conference on Computer and Information Technology, CIT-2010, 7th IEEE international conference on Embedded Software and Systems, ICESS-2010, 10th IEEE Int. Conf. Scalable Computing and Communications, ScalCom-2010

作者： Lin, Feiyu Butters, Jonathan Sandkuhl, Kurt Ciravegna, Fabio Jönköping University Sweden University of Sheffield United Kingdom

ISBN: (纸本)9780769541082

Work presented in this paper addresses the challenge of bringing together concepts and experiences from two different areas of computer science: context modeling and ontology matching. Current work in the field of automatic ontology matching does not take into account the context of the user during the matching process. this paper is organized as follows, (1) we introduce of the concept of "context" in the ontology matching process, (2) we introduce the use cases and motivation along with an example of the use of context and (3) an approach for context-based semantic matching, which builds on different (weighted) levels of overlap for a better ranking of alignment elements depending on user's demand. © 2010 IEEE.

关键词： Semantics

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Enhancing Web service registries with semantics and context information

Enhancing Web service registries with semantics and context ...

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2010 IEEE 7th international conference on Services Computing, SCC 2010

作者： Chen, Lu Li, Yan Chow, Randy Department of Computer and Information Science and Engineering University of Florida Gainesville FL 32611 United States

ISBN: (纸本)9780769541266

With the increasing demand for dynamic web service composition, traditional web service registries are no longer adequate in providing precise service selection. To address this problem, the paper proposes a fine-grain structural concept for traditional service registries, called web service community. Efficient semantic-level service enquiry and community management depend on context information. this paper investigates the issue of context modeling and proposes four categorizations of context information for service composition. Several design issues that relate to these context information are discussed, including community organization, context-aware management and semantic-level web service query. © 2010 IEEE.

关键词： Web services

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An agent-based modeling for pandemic influenza in Egypt

An agent-based modeling for pandemic influenza in Egypt

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2010 7th international conference on Informatics and Systems, INFOS2010

作者： Khalil, Khaled M. Abdel-Aziz, M. Nazmy, Taymour T. Salem, Abdel-Badeeh M. Faculty of Computer and Information Science Ain Shams University Cairo Egypt

ISBN: (纸本)9789774033964

Pandemic influenza has great potential to cause large and rapid increases in deaths and serious illness. the objective of this paper is to develop an agent-based model to simulate the spread of pandemic influenza (novel H1N1) in Egypt. the proposed multi-agent model is based on the modeling of individuals' interactions in a space-time context. the proposed model involves different types of parameters such as: social agent attributes, distribution of Egypt population, and patterns of agents' interactions. Analysis of modeling results leads to understanding the characteristics of the modeled pandemic, transmission patterns, and the conditions under which an outbreak might occur. In addition, the proposed model is used to measure the effectiveness of different control strategies to intervene the pandemic spread.

关键词： Autonomous agents

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