检索结果-内蒙古大学图书馆

Software-Defined Networking: A Comprehensive Survey Introduction

PROCEEDINGS OF THE IEEE 2015年第1期103卷 10-13页

作者： Esch, Jim Department of Informatics of Faculty of Sciences University of Lisbon Lisbon Portugal Interdisciplinary Centre for Security Reliability and Trust (SnT) University of Luxembourg Luxembourg School of Electrical and Computer Engineering (FEEC) University of Campinas Campinas Brazil Gesellschaft für Wissenschaftliche Datenverarbeitung mbH Göttingen (GWDG) Göttigen Germany Queen Mary University of London London U.K.

The Internet has led to the creation of a digital society, where (almost) everything is connected and is accessible from anywhere. However, despite their widespread adoption, traditional IP networks are complex and very hard to manage. It is both difficult to configure the network according to predefined policies, and to reconfigure it to respond to faults, load, and changes. To make matters even more difficult, current networks are also vertically integrated: the control and data planes are bundled together. Software-defined networking (SDN) is an emerging paradigm that promises to change this state of affairs, by breaking vertical integration, separating the network's control logic from the underlying routers and switches, promoting (logical) centralization of network control, and introducing the ability to program the network. The separation of concerns, introduced between the definition of network policies, their implementation in switching hardware, and the forwarding of traffic, is key to the desired flexibility: by breaking the network control problem into tractable pieces, SDN makes it easier to create and introduce new abstractions in networking, simplifying network management and facilitating network evolution. In this paper, we present a comprehensive survey on SDN. We start by introducing the motivation for SDN, explain its main concepts and how it differs from traditional networking, its roots, and the standardization activities regarding this novel paradigm. Next, we present the key building blocks of an SDN infrastructure using a bottom-up, layered approach. We provide an in-depth analysis of the hardware infrastructure, southbound and northbound application programming interfaces (APIs), network virtualization layers, network operating systems (SDN controllers), network programming languages, and network applications. We also look at cross-layer problems such as debugging and troubleshooting. In an effort to anticipate the future evolution of this ne

关键词： Control systems IP networks Virtualization Software defined networking computer networks Communication networks

来源：评论

学校读者我要写书评

暂无评论

26th Annual Computational Neuroscience Meeting (CNS*2017): Part 3 Antwerp, Belgium. 15-20 July 2017 Abstracts

引用

BMC NEUROSCIENCE 2017年第SUPPL 1期18卷 95-176页

作者： [Anonymous] Department of Neuroscience Yale University New Haven CT 06520 USA Department Physiology & Pharmacology SUNY Downstate Brooklyn NY 11203 USA NYU School of Engineering 6 MetroTech Center Brooklyn NY 11201 USA Departament de Matemàtica Aplicada Universitat Politècnica de Catalunya Barcelona 08028 Spain Institut de Neurobiologie de la Méditerrannée (INMED) INSERM UMR901 Aix-Marseille Univ Marseille France Center of Neural Science New York University New York NY USA Aix-Marseille Univ INSERM INS Inst Neurosci Syst Marseille France Laboratoire de Physique Théorique et Modélisation CNRS UMR 8089 Université de Cergy-Pontoise 95300 Cergy-Pontoise Cedex France Department of Mathematics and Computer Science ENSAT Abdelmalek Essaadi’s University Tangier Morocco Laboratory of Natural Computation Department of Information and Electrical Engineering and Applied Mathematics University of Salerno 84084 Fisciano SA Italy Department of Medicine University of Salerno 84083 Lancusi SA Italy Dipartimento di Fisica Università degli Studi Aldo Moro Bari and INFN Sezione Di Bari Italy Data Analysis Department Ghent University Ghent Belgium Coma Science Group University of Liège Liège Belgium Cruces Hospital and Ikerbasque Research Center Bilbao Spain BIOtech Department of Industrial Engineering University of Trento and IRCS-PAT FBK 38010 Trento Italy Department of Data Analysis Ghent University Ghent 9000 Belgium The Wellcome Trust Centre for Neuroimaging University College London London WC1N 3BG UK Department of Electronic Engineering NED University of Engineering and Technology Karachi Pakistan Blue Brain Project École Polytechnique Fédérale de Lausanne Lausanne Switzerland Departement of Mathematics Swansea University Swansea Wales UK Laboratory for Topology and Neuroscience at the Brain Mind Institute École polytechnique fédérale de Lausanne Lausanne Switzerland Institute of Mathematics University of Aberdeen Aberdeen Scotland UK Department of Integrativ

来源：评论

学校读者我要写书评

暂无评论

Concept learning in the description logic ALCH(D) based onminimal model reasoning for RDF data

引用

Transactions of the Japanese Society for Artificial Intelligence 2014年第3期29卷 343-355页

作者： Nagai, Takuma Kaneiwa, Ken Electrical Engineering and Computer Science Graduate School of Engineering Iwate University Japan Department of Communication Engineering and Informatics Graduate School of Informatics and Engineering The University of Electro-Communications Japan

In this paper, we propose an algorithm for ALCH(D) concept learning from RDF data using minimal model reasoning. This algorithm generates concept expressions in the Description Logic ALCH(D) by giving background knowledge and positive and negative examples in the RDF form. Our method can be widely applied to RDF data on the Web, as background knowledge. An advantage of the method for RDF data is that reasoning on RDF graphs is tractable compared to logical reasoning for OWL data. We solve the problem that RDF data cannot be directly applied to the concept learning due to its less expressive power, specifically, the lack of negative expressions. In order to construct expressive ALCH(D) concepts from less expressive RDF data in the concept learning, we introduce (nonmonotonic inference rules based on minimal model reasoning which derive implicit subclass and subproperty relations from the background knowledge in the RDF form. We prove the soundness, completeness and decidability of the nonmonotonic RDF reasoning in the minimal Herbrand models for RDF graphs. The process of concept learning is divided in two parts: (i) concept generation and (ii) concept evaluation. In the concept generation, minimal model reasoning enables us to derive complex concepts consisting of negation, conjunction, disjunction and quantifiers and to exclude inconsistent concepts. In the concept evaluation, we evaluate hypothesis concepts with class and property hierarchies where minimal model reasoning is used for expressing more specific concepts as the answer for learning. We implement a system that learns some ALCH(D) concepts describing the features of given examples.

关键词： Data description

来源：评论

学校读者我要写书评

暂无评论

Clotho: Proactive wearout deceleration in Chip-Multiprocessor interconnects

Clotho: Proactive wearout deceleration in Chip-Multiprocesso...

引用

IEEE International Conference on computer Design: VLSI in computers and Processors, (ICCD)

作者： Arseniy Vitkovskiy Vassos Soteriou Paul V. Gratz Dept. of Electrical Eng. Computer Eng. and Informatics Cyprus University of Technology Dept. of Electrical and Computer Engineering Texas A&M University

With advancing process technology, Chip-Multiprocessors (CMPs) are experiencing ever worsening reliability due to prolonged operational stresses. The network-on-chip that interconnects the components of CMPs is especially vulnerable to such wearout-induced failure. To tackle this ominous threat we present Clotho, a novel, wearout-aware routing algorithm. Clotho continuously considers the stresses the on-chip interconnect experiences at runtime, along with temperature and fabrication process variation metrics, steering traffic away from locations that are most prone to Electromigration (EM)- and Hot-Carrier Injection (HCI)-induced wear. Under realistic workloads Clotho yields 66% and 8% average increases in mean time to failure for EM and HCI, respectively.

关键词： Human computer interaction Transistors Routing Stress Electromigration Correlation Integrated circuit interconnections

来源：评论

学校读者我要写书评

暂无评论

Introducing weighted approaches to study network brain dynamics from EEG epilepsy measurements: the EigenBrain algorithm

Introducing weighted approaches to study network brain dynam...

引用

IEEE International Conference on Bioinformatics and Bioengineering

作者： Nantia D. Iakovidou Manolis Christodoulakis Eleftherios S. Papathanasiou Savvas S. Papacostas Georgios D. Mitsis Department of Informatics Data Engineering Laboratory (DELAB) Aristotle University of Thessaloniki Department of Electrical and Computer Engineering University of Cyprus Cyprus Institute of Neurology and Genetics

ISBN: (纸本)9781467379847

It is fairly established that dynamic recordings of functional activity maps can naturally and efficiently be represented by functional connectivity networks. In this article we study weighted and fully-connected brain networks, created from electroencephalographic (EEG) measurements that concern patients with focal and generalized epilepsy. We introduce a totally new methodology that has never been utilized before and that investigates weighted and fully-connected networks, which includes eigen-decomposition analysis, feature extraction and quantitative comparisons among entire graph datasets. Our goal is to establish epileptic seizure detection/prediction rules, by identifying repetitive EEG activity in patients before and after each seizure onset. In the present paper we treat each brain network as a weighted and full adjacency matrix, without cutting, binarizing or ignoring any values. In this way, it is the first time that the full structure of the connectivity weighing profile is exploited. Also apart from graph theory approaches, mathematical models such as eigen-decomposition analysis are used in our research, in order to study and analyze brain networks. Finally, we present and discuss the results and conclusions of our new method, which are in line with earlier EEG epilepsy findings and demonstrate a standard EEG behavior in both the postictal and preictal period.

关键词： Electroencephalography Epilepsy Eigenvalues and eigenfunctions Correlation Euclidean distance Feature extraction Brain

来源：评论

学校读者我要写书评

暂无评论

Energy-efficient reconstruction of compressively sensed bioelectrical signals with stochastic computing circuits

Energy-efficient reconstruction of compressively sensed bioe...

引用

IEEE International Conference on computer Design: VLSI in computers and Processors, (ICCD)

作者： Yufei Ma Minkyu Kim Yu Cao Jae-Sun Seo Sarma Vrudhula School of Electrical Computer and Energy Engineering School of Computing Informatics and Decision Systems Engineering Arizona State University Tempe Arizona U.S.A

Compressive sensing (CS) allows acquiring sparse signals at sub-Nyquist rate, offering an energy-efficient solution to data acquisition. This is especially important to reduce communication data for mobile medical applications. However, reconstructing the signal from CS is usually left off-line due to the complex computations. In this paper, we integrate two key technologies to enable on-line energy-efficient CS signal reconstruction. These are (1) the use of Bayesian CS Belief Propagation (CS-BP) as the algorithm basis and (2) the novel design of stochastic computing (SC) circuits to efficiently map CS-BP algorithm. The overall signal reconstruction system is implemented with digital SC circuits in 65nm CMOS and recovers compressively sensed electrocardiography (ECG) and electromyography (EMG) signals with 11X to 8X data compression factor. Compared to a conventional binary design, post-layout simulation results show that the proposed stochastic design performs reconstruction with 5X energy-delay product improvement and 2X area reduction.

关键词： Convolution Yttrium Hardware Complexity theory Bayes methods Logic gates Wires

来源：评论

学校读者我要写书评

暂无评论

Interleaved Coding for Secrecy with a Hidden Key

Interleaved Coding for Secrecy with a Hidden Key

引用

IEEE Globecom Workshops

作者： Dinis Sarmento Jo?o P. Vilela Willie K. Harrison Marco Gomes Instituto de Telecomunica??es Department of Electrical and Computer Engineering University of Coimbra Coimbra Portugal CISUC and Department of Informatics Engineering University of Coimbra Coimbra Portugal Department of Electrical and Computer Engineering University of Colorado Colorado Springs Colorado Springs CO 80923

ISBN: (纸本)9781467395274

We propose a coding scheme based on the combination of interleaving with systematic channel codes for secrecy. The basic idea consists of generating a random interleaving key that is used to shuffle/interleave information at the source. The message and the interleaving key are then both encoded with a systematic code and the part related to the interleaving key is removed/punctured before being sent to the channel, hence operating as a hidden key for any receiver (legitimate or not) that needs to deinterleave the message. Successfully obtaining the original message then depends on determining the interleaving key, which can only be done through the parity bits that result from jointly encoding the interleaving key and the message. We provide a method to determine the necessary signal-to-noise ratio difference that enables successful reception at the legitimate receiver without the eavesdropper having access to the message. In addition, we provide evidence that this scheme may also be used to turn a realistic channel into a discrete memoryless channel, thus providing a first practical implementation of an abstract channel that can be employed with a wiretap code to provide information-theoretic security guarantees.

关键词： wireless secrecy coding interleaving physical-layer security

来源：评论

学校读者我要写书评

暂无评论

High-gain 1.3 μm GaInNAs semiconductor optical amplifier with enhanced temperature stability for all-optical signal processing at 10 Gb/s

High-gain 1.3 μm GaInNAs semiconductor optical amplifier wi...

引用

作者： Fitsios, D. Giannoulis, G. Korpijärvi, V.-M. Viheriälä, J. Laakso, A. Iliadis, N. Dris, S. Spyropoulou, M. Avramopoulos, H. Kanellos, G.T. Pleros, N. Guina, M. Department of Informatics Aristotle University of Thessaloniki Thessaloniki54124 Greece School of Electrical and Computer Engineering National Technical University of Athens Athens Greece Tampere University of Technology Tampere Finland Information Technologies Institute Center for Research and Technology Hellas Thessaloniki Greece

We report on the complete experimental evaluation of a GaInNAs/GaAs (dilute nitride) semiconductor optical amplifier that operates at 1.3 μm and exhibits 28 dB gain and a gain recovery time of 100 ps. Successful wavelength conversion operation is demonstrated using pseudorandom bit sequence 27 - 1 non-return-to-zero bit streams at 5 and 10 Gb/s, yielding error-free performance and showing feasibility for implementation in various signal processing functionalities. The operational credentials of the device are analyzed in various operational regimes, while its nonlinear performance is examined in terms of four-wave mixing. Moreover, characterization results reveal enhanced temperature stability with almost no gain variation around the 1320 nm region for a temperature range from 20°C to 50°C. The operational characteristics of the device, along with the cost and energy benefits of dilute nitride technology, make it very attractive for application in optical access networks and dense photonic integrated circuits. © 2014 Optical Society of America.

关键词： Semiconductor optical amplifiers

来源：评论

学校读者我要写书评

暂无评论

Simulation of time-continuous chaotic UEDA oscillator as the generator of random numbers for heuristic 29

Simulation of time-continuous chaotic UEDA oscillator as the...

引用

29th European Conference on Modelling and Simulation, ECMS 2015

作者： Senkerik, Roman Pluhacek, Michal Davendra, Donald Zelinka, Ivan Oplatkova, Zuzana Kominkova Tomas Bata University in Zlin Faculty of Applied Informatics Nam T.G. Masaryka 5555 Zlin760 01 Czech Republic Department of Computer Science Faculty of Electrical Engineering and Computer Science VB-TUO 17. listopadu 15 Ostrava-Poruba708 33 Czech Republic

ISBN: (纸本)9780993244001

This paper investigates the utilization of the time-continuous chaotic system, which is UEDA oscillator, as the chaotic pseudo random number generator. (CPRNG). Repeated simulations were performed investigating the influence of the oscillator sampling time to the selected heuristic, which is differential evolution algorithm (DE). Initial experiments were performed on the selected test function in higher dimensions. © ECMS Valen M. Mladenov, Petia Georgieva, Grisha Spasov, Galidiya Petrova (Editors).

关键词： Chaotic systems

来源：评论

学校读者我要写书评

暂无评论

An Interactive Augmented Reality Chess Game Using Bare-Hand Pinch Gestures

An Interactive Augmented Reality Chess Game Using Bare-Hand ...

引用

International Conference on Cyberworlds

作者： Marios Bikos Yuta Itoh Gudrun Klinker Konstantinos Moustakas Electrical and Computer Engineering Department University of Patras Patras-Rion Greece Department of Informatics Technical University of Munich Germany

In order to produce realistic simulations and enhance immersion in augmented reality systems, solutions must not only present a realistic visual rendering of virtual objects, but also allow natural hand interactions. Most approaches capable of understanding user interaction with virtual content can often be restrictive or computationally expensive. To cope with these problems, we demonstrate a method which employs user's thumb and forefinger to interact with the virtual content in a natural way, utilizing a single RGB-D camera. Based on this method, we develop and realise an augmented reality chess game, focused on providing an immersive experience to users, so that they are able to manipulate virtual chess pieces seamlessly over a board of markers and play against a chess engine.

关键词： Three-dimensional displays Cameras Games Augmented reality Engines Image color analysis Real-time systems

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：