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Iranian Conference on Electrical engineering (ICEE)

作者： Mehran Moslehi Bajestan Mohammad Ali Shamsinejad Davood Arab Khaburi Dep. of Electrical and Computer Engineering University of Birjand Birjand Iran Dep. of Electrical Engineering Iran University of Science and Technology Tehran Iran

This paper presents the ac small signal modeling and analysis of trans Z-Source inverter (trans ZSI). Trans ZSI has been derived from quasi Z-source converter recently. While maintaining all prominent features of pervious Z-source inverters, trans ZSI has several unique advantages such as increased voltage gain, reduced voltage stress and reduced components of impedance network. In the process of designing control schemes for the trans ZSI, knowledge of the transfer function representing its unique dc impedance network is essential. In particular, the state space averaging method is employed to deduce the transfer functions. These transfer functions reveal the presence of right half plane (RHP) zero, which imposes some limitations on controller design. The RHP zero trajectories with variations in network parameters can be studied using classical root-locus analyses. Considering system dynamic characteristics, the trans ZSI design guidelines for passive component sizing is investigated by parameter sweeping of the small signal model based transfer functions. Simulation results are presented to verify the dynamic modeling identified in this paper.

关键词： Inverters Electrical engineering Poles and zeros Capacitors Damping Analytical models

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City users' classification with mobile phone data

City users' classification with mobile phone data

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IEEE International Conference on Big Data

作者： Lorenzo Gabrielli Barbara Furletti Roberto Trasarti Fosca Giannotti Dino Pedreschi Dep. of Information Engineering University of Pisa Italy ISTI - CNR Pisa Italy Dep. of Computer Science University of Pisa Italy

Nowadays mobile phone data are an actual proxy for studying the users' social life and urban dynamics. In this paper we present the Sociometer, and analytical framework aimed at classifying mobile phone users into behavioral categories by means of their call habits. The analytical process starts from spatio-temporal profiles, learns the different behaviors, and returns annotated profiles. After the description of the methodology and its evaluation, we present an application of the Sociometer for studying city users of one small and one big city, evaluating the impact of big events in these cities.

关键词： mobile phone data individual profiles classification semi-automatic methods

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On the influence of incoherence in inconsistency-tolerant semantics for datalog±

On the influence of incoherence in inconsistency-tolerant se...

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Joint Ontology Workshops 2015, JOWO 2015 - Episode 1: The Argentine Winter of Ontology

作者： Deagustini, C.A. Martinez, M.V. Falappa, M.A. Simari, G.R. AI R and D Lab. Dep. of Computer Science and Engineering Universidad Nacional Del sur Bahía Blanca Argentina Avenida Rivadavia 1917 Ciudad Autónoma de Buenos Aires Argentina

The concept of incoherence naturally arises in ontological settings, specially when integrating knowledge. In this work we study a notion of incoherence for Datalog± ontologies based on the definition of satisfiability of a set of existential rules regarding the set of integrity constraints in a Datalog± ontology. We show how classical inconsistency-tolerant semantics for query answering behaves when dealing with atoms that are relevant to unsatisfiable sets of existential rules, which may hamper the quality of answers-even under inconsistency-tolerant semantics, which is expected as they were not designed to confront such issues. Finally, we propose a notion of incoherency-tolerant semantics for query answering in Datalog±, and present a particular one based on the transformation of classic Datalog± ontologies into defeasible Datalog± ones, which use argumentation as its reasoning machinery. © Copyright 2015, for this paper by its authors.

关键词： Semantics

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The evolution of Jolie: From orchestrations to adaptable choreographies

Lecture Notes in Computer Science (including subseries Lectu...

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Lecture Notes in computer science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) 2015年 8950卷 506-521页

作者： Lanese, Ivan Montesi, Fabrizio Zavattaro, Gianluigi Dep. of Computer Science and Engineering INRIA FoCUS Team - Univ. Bologna Mura A. Zamboni 7 Bologna40127 France Dep. of Mathematics and Computer Science University of Southern Denmark Campusvej 55 Odense5230 Denmark

Jolie is an orchestration language conceived during Sensoria, an FP7 European project led by Martin Wirsing in the time frame 2005– 2010. Jolie was designed having in mind both the novel –at project time– concepts related to Service-Oriented Computing and the traditional approach to the modelling of concurrency typical of process calculi. The foundational work done around Jolie during Sensoria has subsequently produced many concrete results. In this paper we focus on two distinct advancements, one aiming at the development of dynamically adaptable orchestrated systems and one focusing on global choreographic specifications. These works, more recently, contributed to the realisation of a framework for programming dynamically evolvable distributed Service- Oriented applications that are correct-by-construction. © Springer International Publishing Switzerland 2015.

关键词： Distributed computer systems

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Using Combined Cellular Ad Hoc Communications for Smart Environments

Using Combined Cellular Ad Hoc Communications for Smart Envi...

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International Conference on Advanced Information Networking and Applications Workshops (AINAW)

作者： Mimoza Durresi Arjan Durresi Leonard Barolli Kazunori Uchida Dep. of IT Mathematics and Statistics European University of Tirane Tirana Albania Dep. of Computer Science IUPUI Indianapolis USA Dep. of Information and Communication Engineering Fukuoka Institute of Technology Fukuoka Japan

ISBN: (纸本)9781479917761

We propose a Heterogeneous Multi Domain (HMD) architecture and protocols that uses ad hoc and cellular communications for enabling the exchange of information among users and smart environments. In particular, we focuss on the data communication and information diffusion related to tourism industry. Sensor's technology enables today the collection of various data related to the environment, such as temperature, location, and so on. This information can be delivered timely to users interacting with the environment. For example, a user might get direction in a building or in a park. Our architecture uses a network of gateways as an hierarchical virtual infrastructure to interconnect various network domains. Gateways are responsible for translation among different communication protocols, including routing, signalling, and security. HMD architecture is scalable, flexible and adaptive to QoS needs for interdomain communications. The protocol goal is to optimize such communications in terms of performance.

关键词： Logic gates Protocols Ad hoc networks Routing Smart phones Delays Wireless sensor networks

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Using Cellular Sensor Networks for Environment Protection

Using Cellular Sensor Networks for Environment Protection

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International Conference on Advanced Information Networking and Applications Workshops (AINAW)

ISBN: (纸本)9781479917761

Protecting the environment from many threats has become a priority worldwide. The existing sensor technology enables the continuous monitoring of various parameters related to environment status, such as air quality and many others. In this paper we propose a secure architecture based on cellular networks to collect such sensors' information in real time. The cell phones can interact with the cellular network and the sensor networks at the same time. This unique ability can be leveraged to provide better authentication and security. We propose an architecture for these networks along with protocols that can be used to establish security. In our architecture, we use gateways, as intermediate nodes that are able to interact with both the cell phones and the sensor nodes.

关键词： Cellular phones Logic gates Cryptography Authentication computer architecture Servers

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STESCAL3D: Subjective evaluation of HD stereo video streaming using H.264 SVC in diverse laboratory environments

STESCAL3D: Subjective evaluation of HD stereo video streamin...

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International Workshop on Quality of Multimedia Experience, QoMEx

作者： Charalampos Mysirlidis Tasos Dagiuklas Pedro M. R. Rocha Luis A. Da Silva Cruz Dino Kotaranin Savina Gruicic Emil Dumic Athanassios Skodras School Science & Technology Hellenic Open University Patras Greece Dep. of Wireless Communications University of Zagreb Zagreb Croatia Dep. of Electrical and Computer Engineering University of Coimbra Coimbra Portugal Dep. of Electrical and Computer Engineering University of Patras Patras Greece

This paper presents a new 3D video database (STESCAL3D -Stereoscopic Scalable 3D), made up of 3D stereo video sequences affected by different types of degradations. A set of subjective quality grades have been collected in three geographically displaced sites. The database contents have been produced using scalable video coding to encode 3D stereo video clips with distinct encoding parameters, after which different transmission degradations have been applied to the encoded video streams. These sequences have been subjectively evaluated by observers from three countries, Croatia, Portugal and Greece, using a purpose-built web-based platform. The subjective quality data compiled were processed, analyzed and compared to quality estimates obtained using several well-known objective measures. It is shown that the correlation between objective quality estimates and the subjective quality grades is in general low. Additionally the results show that stereo-view asymmetries in terms of encoding parameters and packet loss ratio (PLR) leads to low quality of experience. The video database and the subjective grades collection are publicly available with the referral link provided in the text.

关键词： Three-dimensional displays Streaming media Observers Video sequences Databases Encoding Correlation

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Energy Models for Communication of Future Computing Platforms

Energy Models for Communication of Future Computing Platform...

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IEEE International Conference on Ubiquitous Wireless Broadband (ICUWB)

作者： Elke Franz Stefan Pfennig Bho Matthiesen Christian Scheunert Eduard A. Jorswieck Dep. of Computer Science/Privacy and Data Security Dep. of Electrical Engineering and Information Technology/Communications Laboratory Technische Universität Dresden Dresden Germany

ISBN: (纸本)9781467365567

Energy efficiency is an essential requirement on future computer architectures. Thereby, the efficiency of the communication will play an important role. Within this paper, we present an energy model for a unicast multi-hop communication. The model allows to derive predictions about the energy of a future computing platform. Further, it can be used to identify which components of the system or tasks related to communication have a significant influence on the overall energy and, hence, require special attention in the design phase. We discuss how values for processing delays and power consumption can be determined for a future computing platform and present values for a target platform. The energy model is applied to derive energy predictions for this platform.

关键词： Delays Computational modeling Power demand Network coding Open systems Hardware Receivers

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SSCF: A Semantic and Social-based Collaborative Filtering Approach

SSCF: A Semantic and Social-based Collaborative Filtering Ap...

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IEEE/ACS International Conference on computer Systems and Applications

作者： Lamia Berkani Artificial Intelligence Laboratory (LRIA) Dep. of Computer Science Faculty of Computer and Electrical Engineering USTHB University Algiers Algeria

ISBN: (纸本)9781509004799

The present paper concerns the members recommendation in social networks. The proposed approach is based on the semantic and social collaborative filtering technique (SSCF). In this approach, the formation of communities of users is based on the calculation of similarities between them and includes semantic and social dimensions. These two dimensions are respectively related to the calculation of similarity between the user and (1) his close friends and (2) those he trusts. A recommender system based on this approach has been developed. The preliminary experiments results show the importance of integrating the semantic and social dimensions in the recommendation process.

关键词： collaborative filtering members recommendation semantic and social collaborative filtering semantic and social representation social networks

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Korean paraphrase evaluation using morphological analysis

Korean paraphrase evaluation using morphological analysis

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International Conference on Advanced Communication Technology (ICACT)

作者： Sung Won Moon Hojin Choi Gahgene Gweon Dep. Of Knowledge Service Engineering Korea Advanced Institute of Science and Technology Daejeon Rep. Of Korea Dep. Of Computer Science Korea Advanced Institute of Science and Technology Daejeon Rep. Of Korea

ISBN: (纸本)9781467381161

Paraphrase evaluation is used to determine whether two input sentences share a same meaning. The automatic analysis for paraphrase evaluation technology has a potential use in the area of information retrieval technology since correctly paraphrased sentences can be used as alternative input sentence in the retrieval process. In this paper, we suggest an evaluation method that is suitable for the Korean language by using morphological analysis. Using our method, we present preliminary results on how our automatic evaluation scores compare to the human evaluation scores.

关键词： Manuals Computational linguistics Information retrieval Natural language processing Correlation Knowledge engineering Syntactics

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