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Novel $\varepsilon$-Approximation to Data Streams in Sensor Networks

IEEE Transactions on Parallel and Distributed Systems 2015年第6期26卷 1654-1667页

作者： Jianzhong Li Guohua Li Hong Gao Department of Computer Science and Technology Harbin Institute of Technology PO Box 750 Harbin P.R. China

We are gradually moving into a realm where sensors, processors, memory and wireless transceivers would be seamlessly integrated together in the physical world and form a wireless sensor network. Such networks pose new challenges in data processing and transmission due to the characteristic of limited communication bandwidth and other resource constraints of sensor networks. To reduce the cost of storage, transmission and processing of time series data generated by sensor nodes, the need for more compact representations of time series data is compelling. Although a large number of data compression algorithms have been proposed to reduce data volume, their offline characteristic or super-linear time complexity prevents them from being applied directly on time series data generated by sensor nodes. Motivated by these observations, we propose an optimal online algorithm GDPLA for constructing a disconnected piecewise linear approximation of a time series which guarantees that the vertical distance between each real data point and the corresponding fit line is less than or equal to ". GDPLA not only generates the minimum number of segments to approximate a time series with precision guarantee, but also only requires linear time O(n) bounded by a constant coefficient 6, where unit 1 denotes the time complexity of comparing the slopes of two lines. The low cost characteristic of our method makes it a proper choice for resource-constrained WSNs. Extensive experiments on two real data sets have been conducted to demonstrate the superior compression performance of our method.

关键词： Time series analysis Piecewise linear approximation Linear approximation Wireless sensor networks Approximation algorithms programmable logic arrays

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Modification Impact Analysis Based Test Case Prioritization for Regression Testing of Service-Oriented Workflow Applications

Modification Impact Analysis Based Test Case Prioritization ...

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IEEE Annual International Computer Software and Applications Conference (COMPSAC)

作者： Hongda Wang Jianchun Xing Qiliang Yang Deshuai Han Xuewei Zhang PLA University of Science and Technology Nanjing China

Test case prioritization for regression testing is an approach that schedules test cases to improve the efficiency of service-oriented workflow application testing. Most of existing prioritization approaches range test cases according to various metrics (e.g., Statement coverage, path coverage) in different application context. Service-oriented workflow applications orchestrate web services to provide value-added service and typically are long-running and time-consuming processes. Therefore, these applications need more precise prioritization to execute earlier those test cases that may detect failures. Surprisingly, most of current regression test case prioritization researches neglect to use internal structure information of software, which is a significant factor influencing the prioritization of test cases. Considering the internal structure information and fault propagation behavior of modifications respect to modified version for service-oriented workflow applications, we present in this paper a new regression test case prioritization approach. Our prioritization approach schedules test cases based on dependence analysis of internal activities in service-oriented workflow applications. Experimental results show that test case prioritization using our approach is more effective than conventional coverage-based techniques.

关键词： Testing Correlation Software Synchronization Schedules Fault detection programmable logic arrays

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Minimum Unsatisfiability based QoS Web Service Composition over the Cloud Computing

Minimum Unsatisfiability based QoS Web Service Composition o...

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International Conference on Intelligent Systems Design and Applications (ISDA)

作者： Abderrahim Ait Wakrime Said Jabbour Univ. Orléans INSA Centre Val de Loire LIFO EA 4022 Orléans France CRIL-CNRS Université Artois France

ISBN: (纸本)9781467387101

Cloud Computing based Software as a Service (SaaS) combines multiple Web Services in order to satisfy a SaaS request. SaaS is based on Service Oriented Architectures and Web Service technology which are popular paradigm to design new generation of applications. These functionalities are published on the Internet, but exploiting rigorously a large data stream in order to use Web Services is a complicated and laborious task which may involve error prone. In this paper we investigate the problem of SaaS Web Service Composition. We present a new technique that combines an encoding into SAT and a Minimal Unsatisfiability Subformulas extraction to obtain the minimum SaaS Web Service Composition. Furthermore, we generalize this approach to take into account the quality of SaaS Web Service.

关键词： Quality of service Web services programmable logic arrays

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Towards a Formalised Representation for the Technical Enforcement of Privacy Level Agreements

Towards a Formalised Representation for the Technical Enforc...

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IEEE International Conference on Cloud Engineering (IC2E)

作者： Michela D'Errico Siani Pearson Security & Cloud Lab. HP Labs UK Security and Cloud Lab HP Labs Bristol UK

Privacy Level Agreements (PLAs) are likely to be increasingly adopted as a standardized way for cloud providers to describe their data protection practices. In this paper we propose an ontology-based model to represent the information disclosed in the agreement to turn it into a means that allows software tools to use and further process that information for different purposes, including automated service offering discovery and comparison. A specific usage of the PLA ontology is presented, showing how to link high level policies to operational policies that are then enforced and monitored. Through this established link, cloud users gain greater assurance that what is expressed in such agreements is actually being met, and thereby can take this information into account when choosing cloud service providers. Furthermore, the created link can be used to enable policy enforcement tools to add semantics to the evidence they produce; this mainly takes the form of logs that are associated with the specific policy of which execution they provide evidence. Furthermore, the use of the ontology model allows a means of enabling interoperability among tools that are in charge of the enforcement and monitoring of possible violations to the terms of the agreement.

关键词： programmable logic arrays Ontologies Engines Data models Data privacy Privacy Monitoring

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Total ionizing dose tolerance of the serial configuration on cyclone II FPGA

Total ionizing dose tolerance of the serial configuration on...

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International Conference on Space Optical Systems and Applications (ICSOS)

作者： Hiroyuki Ito Minoru Watanabe Electrical and Electronic Engineering Shizuoka University Hamamatsu Shizuoka Japan

Recently, existing radiation-hardened static random access memory (SRAM)-based field programmable gate arrays (FPGAs) are anticipated for use in space radiation environments. Although such radiation-hardened SRAM-based FPGAs are programmable, the use of a radiation-damaged gate array has never been assessed for use with application-specific integrated circuits (ASICs) because its serial configuration is invariably damaged first by radiation so that the configuration itself becomes impossible. Therefore, currently available FPGA cannot be used in such faulty gate arrays used in space environments. However, if faulty programmable gate arrays are used, then the total ionizing dose tolerance of the programmable gate array would be increased even if its process technology were the same as that of conventional FPGAs. In this paper, in order to explore the possibility, we experimentally assessed the configuration circuit robust capabilities of a normal Cyclone II FPGA. Also, we examined the failure probability when using 1-bit, 2-bit, 4-bit, and 8-bit buses for the FPGA configuration using the designs of serially configured FPGAs.

关键词： Field programmable gate arrays logic gates Cyclones programmable logic arrays Radiation detectors Circuit faults

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Screening on research-activity on biodegradable polymers for dielectric properties

Screening on research-activity on biodegradable polymers for...

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International Conference on Properties and Applications of Properties and Applications of Dielectric Materials

作者： V.J. Hegde O. Gallot-Lavallée L. Heux CERMAV Univ. Grenoble Alpes and CNRS Grenoble France G2Elab Univ. Grenoble Alpes and CNRS Grenoble France

The review-article is based on the census of publications on the dielectric properties of biodegradable polymers up-to-date. The introduction section highlights why it is important today to enhance our knowledge on electrical properties of biodegradable polymers as a possible alternative to classical non eco-friendly polymers. Following, biodegradable polymers polled for this study is briefly presented; some semantics are precised, and bibliographic research methodology is defined. The review-article describes the chronology of publications, the main contributors, the major publishers, the most studied biodegradable polymers, and the most analyzed dielectric properties. It is observed that Poly(lactic acid) is extensively studied; Year 2007 has been peak for the number of research-reports communicated; the major-contributor and publisher is Japan and IEEE respectively. Around 81 % of publications come from academic initiatives. Dielectric properties such as permittivity and conductivity are found to be reported for all the biodegradable polymers. Electrical breakdown is reported for all except Polyhydroxybutyrate. Loss tangent is least discussed limited to only four biodegradable polymers.

关键词： programmable logic arrays Positron emission tomography Plastics Polymers Semantics

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Design and implementation of MRI RF coil based on 3D printing

Design and implementation of MRI RF coil based on 3D printin...

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IEEE MTT-S International Microwave Workshop Series on RF and Wireless Technologies for Biomedical and Healthcare Applications (IMWS-BIO)

作者： Shufeng Wei Zheng Wang Huixian Wang Xing Lyu Liang Deng Wenhui Yang Chinese Academy of Sciences Institute of Electrical Engineering Beijing Republic of China

ISBN: (纸本)9781479985449

3D printing is the latest developed rapid prototyping technology. It has been applied in the field of industrial design, architecture, automotive, aerospace, medical industries, etc. In this paper, 3D printing technology was used to made magnetic resonance imaging RF coils. The results shown that RF coil designed using 3D printing technology has the following advantages: firstly, the printing material PLA has good insulation properties and low RF loss. The coil made with PLA has high Q value. Secondly, the printing material PLA has no impact on the signals of imaged sample. Thirdly, material has good mechanical properties and the coil can be produced through rational design to made variety of structures to meet the needs of research and clinical applications. Low production cost for coils, especially for some of the complex shape of the coil, has a special advantage.

关键词： Radio frequency Three-dimensional displays Printing Magnetic resonance imaging programmable logic arrays Phantoms

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Singularity study of induced cable response irradiated by plane-wave

Singularity study of induced cable response irradiated by pl...

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IEEE International Conference on Computational Electromagnetics (ICCEM)

作者： Min Zhang Tianmin Zeng Fei Su School of Electronic Information and Electrical Engineering Shanghai Jiao Tong University Shanghai China

ISBN: (纸本)9781479962822

This work presents a peculiar phenomenon which occurs in the response at a cable terminal exposed to an incident plane wave. There is no even-order resonance peak in the induced voltage if the entire cable is irradiated perpendicularly. Theoretical formulation predicts the phenomenon which is in turn validated by a full-wave electromagnetic simulation of the scenario.

关键词： Wires programmable logic arrays Radiation effects Resonant frequency Educational institutions Electric fields

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Linear fusion of interrupted reports in cooperative spectrum sensing for cognitive radio networks

Linear fusion of interrupted reports in cooperative spectrum...

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

作者： Younes Abdi Tapani Ristaniemi Department of Mathematical Information Technology University of Jyvaskyla Finland

Interrupted reporting has recently been introduced as an effective method to increase the energy efficiency of cooperative spectrum sensing schemes in cognitive radio networks. In this paper, joint optimization of the reporting and fusion phases in a cooperative sensing with interrupted reporting is considered. This optimization aims at finding the best weights used at the fusion center to construct a linear fusion of the received interrupted reports, jointly with Bernoulli distributions governing the statistical behavior of the interruptions. The problem is formulated by using the deflection criterion and as a nonconvex quadratic program which is then solved for a suboptimal solution, in a computationally-affordable fashion, by a semidefinite relaxation technique. The system performance is then demonstrated by a set of numerical results which compare the performance of the system for the cases with and without the optimal linear fusion.

关键词： Sensors Optimization Energy efficiency Computational efficiency Artificial neural networks Eigenvalues and eigenfunctions programmable logic arrays

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Distributed modeling of submillimeter-wave HEMT parasitics based on full-wave electromagnetic analysis

Distributed modeling of submillimeter-wave HEMT parasitics b...

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Microwave, MTT-S International Symposium

作者： Yasir Karisan Cosan Caglayan Georgios C. Trichopoulos Kubilay Sertel The ElectroScience Laboratory The Ohio State University Columbus OH

ISBN: (纸本)9781479982769

We present a broadband distributed parasitic equivalent circuit model to accurately reproduce the frequency response of electromagnetic (EM) field couplings within the structure of submillimeter-wave (sub-mmW) high electron mobility transistors (HEMTs) in terahertz (THz) band. We also develop a novel systematic multi-step parameter extraction algorithm. The accuracy of the suggested extraction procedure is validated through extensive comparisons between full-wave (FW) simulated, measured, and modeled frequency responses of the presented test standards up to 750 GHz.

关键词： programmable logic arrays logic gates Electrodes Integrated circuit modeling Scattering parameters Impedance Noise measurement

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