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IEEE Conference on Aerospace

作者： Ivan Stupia Claudio Sacchi Luc Vandendorpe ICTEAM Institute Universite catholique de Louvain Louvain-Ia-Neuve Belgium Dep. of Information Engineering and Computer Science (DISI) University of Trento

In this paper, a relay-based energy-efficient cooperative communication strategy is proposed, under the hypothesis that the relay transmits with power drawn from energy-harvesting (EH) sources. Assuming a deterministic EH model under which the harvested amount of energy is known prior to transmission, a spectrally efficient adaptive Bit-Interleaved Coded (BIC) OFDM modulation scheme has been investigated. To guarantee the successful reception of a packet, Automatic Repeat Request (ARQ) protocol has been adopted. Assuming a long term static channel, the expected goodput (EGP) metric is used as cost function to be optimized. The most significant step-ahead of the proposed approach with respect to state-of-the-art is to increase the cooperation gain by using a bargaining game algorithm. Since most renewable sources are highly intermittent, they can induce significant fluctuation on the available power. The bargaining game algorithm takes into account the energy status of the relay and helps the source node to decide whether to cooperate or not with the relay. Achieved simulation results show that the bargaining game algorithm actually helps the nodes to select the right strategy, with a substantial goodput improvement, in particular when the energy availability of relay becomes intermittent due to the harvesting.

关键词： Relays Protocols Signal to noise ratio Decoding Games Measurement Energy harvesting

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Self-Triggered Set-Valued Observers

Self-Triggered Set-Valued Observers

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European Control Conference

作者： Daniel Silvestre Paulo Rosa Joao P. Hespanha Carlos Silvestre Dep. of Electrical and Computer Engineering Instituto Superior Tecnico ISR Deimos Engenharia Dept. of Electrical and Computer Eng. University of California Department of Electrical and Computer Engineering of the Faculty of Science and Technology of the University of Macau

ISBN: (纸本)9781467371605

This paper addresses the problem of high computational requirements in the implementation of Set-Valued Observers (SVOs), which places stringent constraints in terms of their use in applications where low computational power is available or the plant is sensitive to delay. It is firstly shown how to determine an overbound for the set-valued estimates, which reduces the overhead by limiting the number of inequalities defining those set-valued state estimates. In the particular setting of distributed gossip problems, the proposed algorithm is shown to have constant complexity. This algorithm is of prime importance to reduce the computational load and enable the use of such estimates for real-time applications. Results are also provided regarding the frequency of the triggers in the worst-case scenario. The performance of the proposed method is evaluated through simulation.

关键词： computational power Observers TRIGGERS inequalities real-time application program Gossip simulating

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The relationship between psycho-pedagogical and usability data in the TERENCE evaluation methodology

Advances in Intelligent Systems and Computing

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Advances in Intelligent Systems and Computing 2014年 292卷 61-68页

作者： Cecilia, M.R. Cofini, V. di Mascio, Tania Vittorini, Pierpaolo Dep. of Life Health and Environmental Sciences Univ. of L'Aquila Italy Dep. of Information Engineering Computer Science and Mathematics Univ. of L'Aquila Italy

The TERENCE project was an European FP7 project that improved reading comprehension of its primary users, namely, 7-11 years old children, hearing and deaf 1, from primary schools, with deep text comprehension problems. The project developed an adaptive learning system (ALS) delivering learning material and tasks in an adaptive fashion, according to the profiles of its learners. The paper describes the TERENCE evaluation methodology, its innovative aspect (i.e., the parallel investigation of psycho-pedagogical effectiveness and usability), and focuses on the relationship between usability and psycho-pedagogical data. The study shows that precision in smart games is linearly related to comprehension. © Springer International Publishing Switzerland 2014.

关键词： Audition

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On representations of ternary order relations in numeric strings 2

On representations of ternary order relations in numeric str...

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2nd International Conference on Algorithms for Big Data, ICABD 2014

作者： Kim, Jinil Amir, Amihood Na, Joong Chae Park, Kunsoo Sim, Jeong Seop Dep. of Computer Science and Engineering Seoul National University Korea Republic of Department of Computer Science Bar-Ilan University Israel Johns Hopkins University United States Dep. of Computer Science and Engineering Sejong University Korea Republic of Dep. of Computer and Information Engineering Inha University Korea Republic of

Order-preserving matching is a string matching problem of two numeric strings where the relative orders of consecutive substrings are matched instead of the characters themselves. The order relation between two charac... 详细信息

关键词： Pattern matching

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Enhancing Fault Tolerance and Reducing Delay in Virtual Network Embedding using NSGA-II

Enhancing Fault Tolerance and Reducing Delay in Virtual Netw...

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International Conference on computer, Communication and Control

作者： Angel Bansal Omprakash Kaiwartya Ravindra K. Singh Shiv Prakash Computer Science and Eng. Jaypee University of Eng. and Tech. Faculty of Computing Universiti Teknologi Malaysia Dep. of Chemical Engineering Indian Institute of Technology Delhi

ISBN: (纸本)9781479981656

To improve utilization of resources, efficient resource sharing technique is the key requirement. Recently, Virtual Network Embedding (VNE) has been explored as a resource sharing technique for the modern Internet architecture. The VNE techniques suggested in literature, fault tolerance of connections and nodes of network has not been taken into account. Therefore, these techniques improve resource utilization but their performance is not reliable in realistic network scenario considering the presence of failure in real network environment. To incorporate fault tolerance into account while designing VNE technique, this paper proposes a method for enhancing fault tolerance and reducing delay using Non-dominated Sorting based Genetic Algorithm (NSGA-II). A multi-objective optimization problem is mathematically derived. The two objectives of the optimization problem are fault tolerance and delay of a network path. Modified NSGA-II is developed to solve the optimization problem. Analysis of simulation results confirms that M-NSGA-II effectively optimizes both the objectives of the problem of VNE.

关键词： Fault Tolerance Delay Virtual Network Embedding NSGA-II Optimization

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The monitoring of land use and land cover change of Sichuan province and Chengdu district, China

The monitoring of land use and land cover change of Sichuan ...

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IEEE International Symposium on Geoscience and Remote Sensing (IGARSS)

作者： Shijie Yu Zezhong Zheng Wunian Yang Mingcang Zhu Yong He Zhenlu Yu Shengli Wang Fu Wang Jiang Li School of Resources and Environment Univ. of Electronic Science and Technology of China Chengdu Sichuan PRC State Key Laboratory of Water Resources and Hydropower Engineering Science Wuhan Univ. Wuhan Hubei PRC Ministry of Land and Resources of the China Chengdu Univ. of Technology Chengdu Sichuan PRC Guangxi Key Laboratory for Spatial Information and Geomatics Guilin Guangxi PRC Land and Resources Department of Sichuan Province Chengdu Sichuan PRC Sichuan Institute of Geo-Environment Monitoring Chengdu Sichuan PRC China National Space Administration Earth Observation System and Data Center Beijing PRC CMA National Satellite Meteorological Center Beijing PRC Dep. of Electrical and Computer Engineering Old Dominion Univ. Norfolk VA USA

Land use and land cover change (LUCC) is necessary to explore the factors leading to heavy drought and rainy-flood disaster in some districts of Sichuan province. A method based RS, GIS, GPS and Google earth (GE) is presented to establish LUCC database in Sichuan province and Chengdu district. At first, LUCC is interpreted based on the new temporal images and the land use and land cover database from TM in ***, some ground objects, which could not be identified in the new temporal images, were interpreted utilizing GE with some higher spatial resolution images. Thirdly, the new interpreted LUCC was validated in the field with GPS handheld receiver. Then, LUCC of Sichuan province was updated. A comparative analysis of LUCC between in Sichuan province and in Chengdu district was conducted and the result showed: (1) a large amount of farmland in Sichuan Province was occupied from 2000 to 2005 and the area is 84 573 ha. While construction land gained obviously and the area was 35 828 ha. The dynamic degree of construction land was 111.10 0 / 00 from 2000 to 2005. The LUCC demonstrated that the economy of Sichuan province continued to develop, the cities were overspreading and the urban heat island effect was deteriorated from 2000 to 2005. (2) A large amount of farmland was also occupied in Chengdu district from 2000 to 2005, the area amounted to 12 989 ha. The farmland lost was mainly changed to construction land, amounting to 93%. And the dynamic degree was 117.41 0 / 00 from 2000 to 2005, which was bigger than that in Sichuan province.

关键词： Spatial resolution Global Positioning System Urban areas Thermal pollution Remote sensing Google Databases

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A clinically assisted collaborative system architecture for preventing falls in elderly people

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) 2014年 8868卷 111-114页

作者： Orozco, Javier Santos, Rodrigo Ochoa, Sergio Ordinez, Leo Messeguer, Roc Baloian, Nelson Dep. Electrical Engineering and Computers IIIE UNS-CONICET Argentina Computer Science Department Universidad de Chile Chile Computer Science Department Universidad Politecnica de Catalunya Spain

ISBN: (纸本)9783319131047

Falls in older adults are not only frequent but also potentially disabling for them. Detecting and preventing these falls have an important impact in the life of the elderly people. This paper presents the architecture of a pervasive system designed to perform early detection of older adults in risk of falling or fell down. The system notifies the appropriate people or healthcare organizations in case of detecting a fall of the monitored person. This monitoring process produces minimum disruption in the life style of the elderly. © Springer International Publishing Switzerland 2014.

关键词： Accident prevention

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Energy-efficient HTTP adaptive streaming for high-quality video over HetNets

Energy-efficient HTTP adaptive streaming for high-quality vi...

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IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC)

作者： Yunmin Go Oh Chan Kwon Hwanjun Song Div. of IT Convergence Enaineerina POSTECH (Pohang University of Science and Technolozv) Pohanz Republic of Korea Samsung Electronics Suwon Gyeonggi-do KR Dep. of Computer Science Engineering POSTECH (Pohang University of Science and Technology) Pohang Republic of Korea

In this work, we propose an energy-efficient HTTP adaptive streaming for high-quality video over heterogeneous networks (HetNets). To support high-quality video and overcome the limitations of a single network, the proposed system downloads the video segments by concurrently using the HetNets. In the proposed system, the segment bitrate, number of requested segments, network sleep time, and size of requested data through each wireless network are determined adaptively to provide seamless high-quality video streaming in an energy and cost efficient way. The proposed system is fully implemented in an Android-based mobile device and tested in an actual wireless network environments.

关键词： Artificial neural networks Land mobile radio Business Energy consumption Adaptive systems Heterogeneous networks Energy efficiency

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The YCB object and Model set: Towards common benchmarks for manipulation research

The YCB object and Model set: Towards common benchmarks for ...

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International Conference on Advanced Robotics (ICAR)

作者： Berk Calli Arjun Singh Aaron Walsman Siddhartha Srinivasa Pieter Abbeel Aaron M. Dollar Dep. of Mechanical Engineering and Materials Science Yale University New Haven CT USA Department of Computer Science University of California at Berkeley Berkeley CA USA Robotics Institute Carnegie Mellon University Pittsburgh PA USA

In this paper we present the Yale-CMU-Berkeley (YCB) Object and Model set, intended to be used for benchmarking in robotic grasping and manipulation research. The objects in the set are designed to cover various aspects of the manipulation problem; it includes objects of daily life with different shapes, sizes, textures, weight and rigidity, as well as some widely used manipulation tests. The associated database provides high-resolution RGBD scans, physical properties and geometric models of the objects for easy incorporation into manipulation and planning software platforms. A comprehensive literature survey on existing benchmarks and object datasets is also presented and their scope and limitations are discussed. The set will be freely distributed to research groups worldwide at a series of tutorials at robotics conferences, and will be otherwise available at a reasonable purchase cost.

关键词： Benchmark testing Robots Shape Grasping Databases Planning Solid modeling

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Evaluation of context models to code wavelet-transformed hyperspectral images

Evaluation of context models to code wavelet-transformed hyp...

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作者： Aulí-Llinàs, Francesc Enfedaque, Pablo Serra-Sagristà, Joan Sanchez, Victor Dep. of Information and Communications Engineering Universitat Autónoma de Barcelona Spain Dep. of Computer Science University of Warwick United Kingdom

ISBN: (纸本)9781479957514

Context modeling is key in wavelet-based image coding schemes to achieve competitive coding performance. Commonly, context models are devised for a particular coding system and are employed for many different types of images. The aim of this work is to evaluate the suitability of three well-known context models for coding hyperspectral images, without focusing on a particular wavelet-based coding system. To do so, an entropy-based measure defined using the mechanisms utilized by modern image codecs is employed. The experimental results assess the appropriateness of the context models considering different coding rates and transform strategies. They reveal that some widely-used context models may not be as adequate as it is generally thought. The hints provided by this analysis may help to design simpler and more efficient wavelet-based codecs for hyperspectral images. © 2014 IEEE.

关键词： Wavelet transforms

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