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The next generation textile antennas based on substrate integrated waveguide technology

The next generation textile antennas based on substrate inte...

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General Assembly and Scientific Symposium, URSI

作者： Sam Agneessens Sam Lemey Riccardo Moro Maurizio Bozzi Hendrik Rogier Dept. of Information Technology (INTEC) IMEC-Ghent University Ghent Belgium Dep. of Electrical Computer and Biomedical Engineering University of Pavia Pavia Italy

Textile antennas for body-worn applications have some very specific requirements and needs. From an electrical engineer's point of view, good radiation characteristics and impedance matching to the active electronics are important. From the wearer's perspective, the antenna should be unobtrusively integrated into the clothing, and the smart textile comfortable to wear. New techniques offer the potential to fulfill these different needs. One new approach consists of applying metalized eyelets to implement substrate integrated waveguide technology on textile materials. This results in high-performance on-body antennas with excellent behavior in close proximity of the human body. Two realizations are discussed: a wideband design and a miniaturized half mode substrate integrated waveguide dual-band design. Both yield excellent free-space and on-body performance, and superb antenna-body isolation, automatically resulting in very robust characteristics when dep.oyed on-body.

关键词： Broadband antennas Antenna measurements Dual band Cavity resonators Substrates Textiles

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Estimation of ship's extremely low frequency electromagnetic signature based on fuzzy fusion for target detection

Estimation of ship's extremely low frequency electromagnetic...

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IEEE China Summit & International Conference on Signal and Information Processing (ChinaSIP)

作者： Yihai Liu Xiaomin Zhang Jianfeng Shao Bingqi Zhang School of Marine Science and Technology Northwestern Polytechnical University Xi'an China Dep. of Electrical & Computer Engineering State University of New York New Paltz USA

The alternative electromagnetic (EM) fields radiating from a ship are widely recognized as new contributors to the application of underwater target detection. This paper focuses on the estimation of this extremely low frequency (ELF) signature from a fuzzy fusion enhancement aspect. Firstly, the ELF signature estimation problem is expanded to a fuzzy credibility solution issue, and a generalized multi-attribute fuzzy vector which represents each frequency points' line spectrum characteristic is obtained by a statistical procedure on sensor's instantaneous spectral analysis. Then, the fuzzy fusion method is applied to obtain the credible degree of each frequency point to be an ELF. Finally, threshold is set to extract ship's truly ELF signature with largest likelihood and shield interference of the noise ELF signature. Experimental results show that the proposed algorithm has particular advantage in remote target detection.

关键词： Ground penetrating radar Geophysical measurement techniques Marine vehicles Frequency estimation Estimation Vectors Electromagnetics

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Detection of JavaScript of Malware with Un-readability Using Mahalanobis-Distance

Detection of JavaScript of Malware with Un-readability Using...

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International Conference on Broadband, Wireless Computing, Communication and Applications (BWCCA)

作者： Kentaro Takamori Mai Iwamoto Shunsuke Oshima Takuo Nakashima Production System Engineering Course Kumamoto National College of Technology Yatsushiro Kumamoto Japan Kumamoto National College of Technology ICT Center for Learning Support Yatsushiro Kumamoto Japan Kumamoto National College of Technology Center for Technical and Educational Support Yatsushiro Kumamoto Japan Dep. of Electronics Engineering and Computer Science Tokai University Kumamoto Japan

Increasing of Java Scripts of malware requires automatic malware detection systems in these days. Our research takes note of the appearence probability and the state transition probability of first order Markov source for both of malware Java Script and other Java Script. The preexperiments found statistical significance. We propose the malware detection method using Mahalanobis-distance with the probability variable of the appearance probability of characters and the probability variable of state transition probability of first order Markov source. As the results of experiments, the method of combining two probability variables proved the effectiveness compared to the method using single probability variable.

关键词： Malware Markov processes Probability Covariance matrices Educational institutions Vectors Feature extraction

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ROOM STATISTICS AND DIRECT-TO-REVERBERANT RATIO ESTIMATION FROM DUAL-CHANNEL SIGNALS

ROOM STATISTICS AND DIRECT-TO-REVERBERANT RATIO ESTIMATION F...

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IEEE International Conference on Acoustics, Speech and Signal Processing

作者： E. Georganti J. Mourjopoulos S. van de Par Laboratory of Experimental Audiology ENT department University Hospital of Zurich Zurich 8091 Switzerland Audio and Acoustic Technology Group Wire Communications Laboratory Electrical & Computer Engineering dep. University of Patras 26500 Greece Acoustics Group Institute of Physics Carl von Ossietzky University Oldenburg 26111 Germany

ISBN: (纸本)9781479928941

A method for the estimation of the direct-to-reverberant-ratio (DRR) from dual-channel microphone recordings without having knowledge of the source signal is proposed. The method is based on previous findings for the statistics of the room transfer function spectral standard deviation and its relationship to the DRR. A novel relationship for the standard deviation of the difference of the magnitude spectra of dual-channel microphone recordings as a function of the DRR is derived. The proposed DRR estimation method is tested and evaluated on reverberant signals recorded in various rooms and at various source/receiver distances.

关键词： Rooms signals Knowledge Source Microphone Device Component Recordings Standard deviation

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Static analysis of worst-case stack cache behavior 13

Static analysis of worst-case stack cache behavior

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21st International Conference on Real-Time Networks and Systems, RTNS 2013

作者： Jordan, Alexander Brandner, Florian Schoeberl, Martin Compilers and Languages Group Institute of Computer Languages Vienna University of Technology Austria Embedded Systems Engineering Section Dep. of Applied Mathematics and Computer Science Technical University of Denmark Denmark

ISBN: (纸本)9781450320580

Utilizing a stack cache in a real-time system can aid predictability by avoiding interference that heap memory traffic causes on the data cache. While loads and stores are guaranteed cache hits, explicit operations are responsible for managing the stack cache. The behavior of these operations can be analyzed statically. We present algorithms that derive worst-case bounds on the latency-inducing operations of the stack cache. Their results can be used by a static WCET tool. By breaking the analysis down into subproblems that solve intra-procedural data-flow analysis and path searches on the call-graph, the worst-case bounds can be efficiently yet precisely determined. Our evaluation using the MiBench benchmark suite shows that only 37% and 21% of potential stack cache operations actually store to and load from memory, respectively. Analysis times are modest, on average running between 0.46s and 1.30s per benchmark, dep.nding on the size of the stack cache. © 2013 ACM.

关键词： Real time systems

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Comparision of multi-carrier techniques in seven-level asymmetric cascade multilevel inverter

Comparision of multi-carrier techniques in seven-level asymm...

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2013 4th International Conference on Power engineering, Energy and Electrical Drives, POWERENG 2013

作者： Colak, Ilhami Kabalci, Ersan Keven, Gokhan Faculty of Technology Department of Electric and Electronic Engineering Gazi University Ankara Turkey Faculty of Engineering and Architecture Dep. of Electrical and Electronic Eng. Nevsehir University Nevsehir Turkey Vocational College of Haci Bektaş Veli Dep. of Computer Programming Nevsehir University Nevsehir Turkey

ISBN: (纸本)9781467363921

The multilevel inverters (MLIs) are classified into three topologies such as Diode Clamped, Flying Capacitor and Cascade Multilevel Inverter (CMLI). CMLI topologies include two kind of structure that is named symmetric and asymmetric topologies. Asymmetric Cascade MLI (ACMLI) topologies consist of unequal DC sources. Many modulation techniques have been used in ACMLI topology such as Multi-Carrier PWM (MC-PWM), Space Vector PWM and Selective Harmonic PWM. The MC-PWM technique is achieved by four different types. In this study, MC-PWM techniques which are named Phase Disposition PWM, Phase Opposition Disposition PWM, Alternate Phase Opposition Disposition PWM and Phase Shifted PWM have been compared. It is uncovered that Phase Opposition Disposition PWM technique is more convenient in terms of Total Harmonic Distortion of output voltage and current signals and in terms of the quality of power factor in ACMLI which is performed in this study. © 2013 IEEE.

关键词： Pulse width modulation

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Feature selection methods in persian sentiment analysis

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18th International Conference on Application of Natural Language to Information Systems, NLDB 2013

作者： Saraee, Mohamad Bagheri, Ayoub School of Computing Science and Engineering University of Salford Manchester United Kingdom Intelligent Database Data Mining and Bioinformatics Lab Electrical and Computer Engineering Dep. Isfahan University of Technology Isfahan Iran

ISBN: (纸本)9783642388231

With the enormous growth of digital content in internet, various types of online reviews such as product and movie reviews present a wealth of subjective information that can be very helpful for potential users. Sentiment analysis aims to use automated tools to detect subjective information from reviews. Up to now as there are few researches conducted on feature selection in sentiment analysis, there are very rare works for Persian sentiment analysis. This paper considers the problem of sentiment classification using different feature selection methods for online customer reviews in Persian language. Three of the challenges of Persian text are using of a wide variety of declensional suffixes, different word spacing and many informal or colloquial words. In this paper we study these challenges by proposing a model for sentiment classification of Persian review documents. The proposed model is based on stemming and feature selection and is employed Naive Bayes algorithm for classification. We evaluate the performance of the model on a collection of cellphone reviews, where the results show the effectiveness of the proposed approaches. © 2013 Springer-Verlag Berlin Heidelberg.

关键词： Feature Selection

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Physical layer security vs. network layer secrecy: Who wins on the untrusted two-way relay channel?

Physical layer security vs. network layer secrecy: Who wins ...

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IEEE International Workshop on computer-Aided Modeling, Analysis, and Design of Communication Links and Networks, CAMAD

作者： Johannes Richter Elke Franz Sabrina Engelmann Stefan Pfennig Eduard A. Jorswieck Dep. of Electrical Engineering and Information Technology/Communications Laboratory Dep. of Computer Science/Privacy and Data Security Technische Universität Dresden Dresden Germany

We consider the problem of secure communications in a Gaussian two-way relay network where two nodes exchange confidential messages only via an untrusted relay. The relay is assumed to be honest but curious, i.e., an eavesdropper that conforms to the system rules and applies the intended relaying scheme. We analyze the achievable secrecy rates by applying network coding on the physical layer or the network layer and compare the results in terms of complexity, overhead, and efficiency. Further, we discuss the advantages and disadvantages of the respective approaches.

关键词： Physical layer Relays Network coding Lattices Payloads Cryptography

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Summary abstract for the 2nd ACM international workshop on multimedia analysis for ecological data 13

Summary abstract for the 2nd ACM international workshop on m...

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21st ACM International Conference on Multimedia, MM 2013

作者： Spampinato, Concetto Mezaris, Vasileios Van Ossenbruggen, Jacco Dep. of Electrical Electronics and Computer Engineering University of Catania 95125 Catania Italy Centre for Research and Technology Hellas Information Technologies Inst. Thermi 57001 Greece Centrum Wiskunde and Informatica 1098 XG Amsterdam NL Netherlands

ISBN: (纸本)9781450324045

The 2nd ACM InternationalWorkshop on Multimedia Analysis for Ecological Data (MAED'13) is held as part of ACM Multimedia 2013. MAED'13, following the first workshop of the MAED series (MAED'12) that was held as part of ACM Multimedia 2012, is concerned with the processing, inter- pretation, and visualization of ecology-related multimedia content with the aim to support biologists in their investi- gations for analyzing and monitoring natural environments. Copyright © 2013 ACM.

关键词： Ecology

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HotCity: Enhancing ubiquitous maps with social context heatmaps 13

HotCity: Enhancing ubiquitous maps with social context heatm...

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12th International Conference on Mobile and Ubiquitous Multimedia, MUM 2013

作者： Komninos, Andreas Besharat, Jeries Ferreira, Denzil Garofalakis, John University of Strathclyde 26 Richmond St. Glasgow G1 1XH United Kingdom Computer Technology Institute and Press University of Patras Rion 26500 Greece Dep. CS and Engineering University of Oulu Finland

ISBN: (纸本)9781450326483

In this paper we present HotCity, a service that demonstrates how collecting and mining the interactions that users make with the urban environment through social networks, can help tourists better plan activities, through sharing the collectively generated social context of a smart, connected city, as a background layer to mapped POI. The data for our service stems from the collection and analysis of 1-month worth of collected human-physical environment interactions (i.e., Foursquare check-ins) data for Oulu, a medium-sized city in Finland, where our service is dep.oyed in ubiquitous public displays. Our analysis demonstrates that a good model of the city's dynamics can be built despite the low popularity of Foursquare amongst locals. Our findings from the field-based trial of the HotCity service yield several useful insights and important contributions. We found that the method of using a heatmap as an intermediate layer of environmental context does not negatively affect the experience of users at the cognitive level, compared with a more traditional map and POI type of interface, where temporal aspects of context are not present. In the concluding sections, we discuss how this cloud-based service can also be used in a variety of ubiquitous computing platforms. © 2013 ACM.

关键词： Ubiquitous computing

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