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Data Compression Conference (DCC)

作者： Francesc Aulí-Llinàs Michael W. Marcellin Victor Sanchez Joan Serra-Sagristà Joan Bartrina-Rapesta Ian Blanes Dep. of Information and Communications Engineering Universitat Autònoma de Barcelona Spain Dep. of Electrical and Computer Engineering University of Arizona USA Dep. of Computer Science The University of Warwick United Kingdom

The coding and transmission of the massive datasets captured by Earth Observation (EO) satellites is a critical issue in current missions. The conventional approach is to use compression on board the satellite to reduce the size of the captured images. This strategy exploits spatial and/or spectral redundancy to achieve compression. Another type of redundancy found in such data is the temporal redundancy between images of the same area that are captured at different instants of time. This type of redundancy is commonly not exploited because the required data and computing power are not available on board the satellite. This paper introduces a coding scheme for EO satellites able to exploit this redundancy. Contrary to traditional approaches, the proposed scheme employs both the downlink and the uplink of the satellite. Its main insight is to compute and code the temporal redundancy on the ground and transmit it to the satellite via the uplink. The satellite then uses this information to compress more efficiently the captured image. Experimental results for Landsat 8 images indicate that the proposed dual link image coding scheme can achieve higher coding performance than traditional systems for both lossless and lossy regimes.

关键词： Satellites Image coding Earth Redundancy Uplink Downlink Encoding

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Indirect voltage regulation of double input Y-source DC-DC converter based on sliding mode control

Indirect voltage regulation of double input Y-source DC-DC c...

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Power Electronic and Drive systems and Technologies Conference (PEDSTC)

作者： Soheil Ahmadzadeh Gholamreza Arab Markadeh Dep. of Computer Science and Electronic Engineering University of Shahrekord Shahrekord Iran

In this paper, a sliding mode controller is designed for regulating the output voltage of a double input and high step-up DC-DC converter with three coupled inductors called Y-source impedance network, which can provide a very high boost at lower shoot-through duty cycle of switch and has one more degree of freedom to achieve voltage boost. In the proposed converter, the set of input sources hand over power to the load at the same time or separately, so joining of different new dc energy sources such as wind turbine, solar array, or fuel cell with a battery can be applied as input sources. The proposed controller is robust and stable against variation of load demands and uncertainty of parameters. Simulation results confirm the capability and effectiveness of the proposed control approach.

关键词： DC-DC power converters Switches Voltage control Sliding mode control Mathematical model Inductors Integrated circuit modeling

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Quantum key distribution with quantum walks

arXiv

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arXiv 2017年

作者： Vlachou, C. Krawec, W. Mateus, P. Paunković, N. Souto, A. SQIG Instituto de Telecomunicações Dep. de Matemática Instituto Superior Técnico Universidade de Lisboa Computer Science and Engineering Department University of Connecticut StorrsCT06268 United States LaSige Faculdade de Ciências Universidade de Lisboa Dep. de Informática Faculdade de Ciências Universidade de Lisboa CeFEMA Instituto Superior Técnico Universidade de Lisboa

Quantum key distribution is one of the most fundamental cryptographic protocols. Quantum walks are important primitives for computing. In this paper we take advantage of the properties of quantum walks to design new secure quantum key distribution schemes. In particular, we introduce a secure quantum key-distribution protocol equipped with verification procedures against full man-in-the-middle attacks. Furthermore, we present a one-way protocol and prove its security. Finally, we propose a semi-quantum variation and prove its robustness against eavesdropping. Copyright © 2017, The Authors. All rights reserved.

关键词： Quantum cryptography

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Genome-Wide Functional Identification of Maximal Consensus Patterns Derived from Multiple Species piRNAs

Genome-Wide Functional Identification of Maximal Consensus P...

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IEEE Symposium on Bioinformatics and Bioengineering (BIBE)

作者： Wen-Ling Chan Mei-Chun Yeh Jing-Doo Wang Jan-Gowth Chang Jeffrey J. P. Tsai Dep. of Bioinformatics and Medical Engineering Asia University Wufeng Taichung Taiwan Dep. of Computer Science and Information Engineering Asia Uniersity Dep. of Medical Research China Medical University

Piwi-interacting RNA (piRNA), with 24 to 33 nt, is the largest category of small non-coding RNA (ncRNA) molecules expressed in animal cells. piRNA complexes have been revealed to both epigenetic and post-transcriptional regulation in germ line and somatic tissues. Generally, they are distinct from microRNA (miRNA) in size and lack of sequence conservation. In this study, class frequency distribution identified the consensus patterns of piRNA across 9 species. To analyze the mechanism of these consensus patters, 4 target prediction tools were integrated. Furthermore, the GO-Term and pathway enrichment were approached for the functional annotation of these targets. The results indicated that two maximal conserved patterns of piRNA were identified in 8 species, whereas maximal consensus pattern in all of 9 species was TAGCTCAGTCGGTAGAGCA seemed to regulate many human genes which involved in binding and activity molecular function. Additionally, these target genes are associated with a number of rare diseases. We believe that this study will contribute to a better understanding of the functionality of piRNA cross species conserved sequences.

关键词： RNA Bioinformatics Genomics Diseases Asia Electronic mail Mice

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Regression Wavelet Analysis for Progressive-Lossy-to-Lossless Coding of Remote-Sensing Data

Regression Wavelet Analysis for Progressive-Lossy-to-Lossles...

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Data Compression Conference (DCC)

作者： Naoufal Amrani Joan Serra-Sagristà Miguel Hernández-Cabronero Michael Marcellin Dep. of Information and Communications Eng. Universitat Autònoma de Barcelona Spain Dep. of Computer Science University of Warwick UK Dep. of Electrical and Computer Engineering University of Arizona USA

Regression Wavelet Analysis (RWA) is a novel wavelet-based scheme for coding hyperspectral images that employs multiple regression analysis to exploit the relationships among spectral wavelet-transformed components. The scheme is based on a pyramidal prediction, using different regression models, to increase the statistical indep.ndence in the wavelet domain. For lossless coding, RWA has proven to be superior to other spectral transform like PCA and to the best and most recent coding standard in remote sensing, CCSDS-123.0. In this paper we show that RWA also allows progressive lossy-to-lossless (PLL) coding and that it attains a rate-distortion performance superior to those obtained with state-of-the-art schemes. To take into account the predictive significance of the spectral components, we propose a Prediction Weighting scheme for JPEG2000 that captures the contribution of each transformed component to the prediction process.

关键词： Encoding Discrete wavelet transforms Principal component analysis Wavelet analysis Computational modeling

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Hybrid Wiener and partial differential equations filter for biomedical image denoising

Hybrid Wiener and partial differential equations filter for ...

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Annual IEEE Northeast Workshop on Circuits and systems (NEWCAS)

作者： Salim Lahmiri Mounir Boukadoum Dep. of electrical engineering Ècole de Technologie Supérieure Montreal Canada Dep. of computer science University of Quebec at Montreal Montreal Canada

We present a novel biomedical image denoising system that combines Wiener and partial differential equation (PDE) filtering to form a sequential hybrid filter. The local Wiener filter is employed to remove additive Gaussian noise in a first step; then, the PDE filter is applied to the resulting filtered image for further noise removal while preserving image edges. Experimental results showed the superiority of the proposed system over using either of the local Wiener filter or PDE filter alone.

关键词： Wiener filters Magnetic resonance imaging Noise measurement Ultrasonic imaging Noise level Biomedical imaging

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A generator of test data set for tactical moving objects based on velocity

A generator of test data set for tactical moving objects bas...

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IEEE International Conference on Big Data

作者： Jiwan Lee Jaegi Hong Bonghee Hong Jinsu Ahn Dep. of Electrical and Computer Engineering Pusan National University Busan South Korea Dep. of Naval Combat Systems Agency for Defense Development Busan South Korea

ISBN: (纸本)9781467390064

It is required to simulate the tactical moving objects such as combat plane, naval vessels, and submarine for performing performance and functional testing of the target management system. It is not possible to collect tactical moving objects data of various circumstances due to military security. To solve this problem, in this paper, we have proposed a generator of test data set for tactical moving objects. The proposed method is to classify three types of target as combat plane, naval vessels, and submarine, to generate elevation, velocity, and movement of different pattern by target types.

关键词： Generators Underwater vehicles Testing Radar computers Australia Big data

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A proposal for DSO bandwidth extension through synchronous time interleaving

A proposal for DSO bandwidth extension through synchronous t...

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IEEE Instrumentation and Measurement Technology Conference

作者： Massimo D'Apuzzo Mauro D'Arco Michele Vadursi Dep. Computer Science and Electrical Engineering University of Naples Federico II Naples ITALY Dep. of Technology University of Naples Parthenope Naples ITALY

ISBN: (纸本)9781467392211

Data transfer rates for aggregated video data stream and within data centers nowadays require an electrical bandwidth up to 100 GHz. This poses big challenges for the design of proper test and measurement solutions, notably related to the acquisition of signals with such a wide bandwidth. To grant sufficient bandwidth and related sample rate, modern oscilloscopes have been using techniques based on frequency-interleaving and time-interleaving, respectively. Earlier this year, an alternative technique has been presented in a white paper [1],[2] based on which an oscilloscope that can offer an electrical bandwidth that is two times that of the adopted ADC has been launched. This result is obtained by combining the operations of a couple of time interleaved channels, each one made up of a mixer followed by an ADC. The paper presents a synchronous time interleaving technique, which can be regarded as an extension of the aforementioned technique. In fact, the proposed technique can be implemented through an architecture that includes four channels, each one including a mixer and an ADC, the latter having an input bandwidth equal to just one fourth the electrical bandwidth achieved by the system.

关键词： Bandwidth Mixers Frequency modulation Oscilloscopes Real-time systems Clocks

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Introducing Parallelism by Using REPARA C++11 Attributes

Introducing Parallelism by Using REPARA C++11 Attributes

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Euromicro Conference on Parallel, Distributed and Network-Based Processing

作者： M. Danelutto J. Daniel Garcia Luis Miguel Sanchez Rafael Sotomayor M. Torquati Dept. of Computer Science Univ. of Pisa Computer Science and Engineering Dep. Universidad Carlos III de Madrid

Patterns provide a mechanism to express parallelism at a high level of abstraction and to make easier the transformation of existing legacy applications to target parallel frameworks. That also opens a path for writing new parallel applications. In this paper we introduce the REPARA approach for expressing parallel patterns and transforming the source code to parallelism frameworks. We take advantage of C++11 attributes as a mechanism to introduce annotations and enrich semantic information on valid source code. We also present a methodology for performing transformation of source code that allows to target multiple parallel programming models. Another contribution is a rule based mechanism to transform annotated code to those specific programming models. The REPARA approach requires programmer intervention only to perform initial code annotation while providing speedups that are comparable to those obtained by manual parallelization.

关键词： Kernel Parallel processing Pipelines Syntactics Parallel programming Standards

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Methods for a Smart Thermostat to Estimate the Characteristics of a House Based on Sensor Data

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Energy Procedia 2016年 95卷 467-474页

作者： Wim van der Ham Michel Klein Seyed Amin Tabatabaei Dilhan J. Thilakarathne Jan Treur Quby Joan Muyskenweg 22 1096 CJ Amsterdam The Netherlands Agent Systems Research Group Dep. of Computer Science VU University Amsterdam The Netherlands

Smart thermostats can play an important role in achieving more economic energy usage in domestic situations. This paper focuses on the energy used for natural gas-based heating, and monitoring of gas usages versus indoor and outdoor temperatures over time. Two methods are presented that enable the smart thermostat to learn, over time, characteristics of the house such as heat loss rate and heat capacity. Through this, the thermostat can make some homeowners aware, for example, that there is room for improvement in insulation of the house. The presented methods are able to deal with sensor data with varying extents of imperfection concerning their completeness.

关键词： heat loss rate heat capacity cooling down rate heating degree days smart thermostat

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