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Faraday anomalous dispersion optical filter at 133Cs weak 459 nm transition

Photonics Research 2015年第5期3卷 275-278页

作者： Xiaobo Xue Duo Pan Xiaogang Zhang Bin Luo Jingbiao Chen Hong Guo State Key Laboratory of Advanced Optical Communication Systems and Networks School of Electronics Engineering and Computer Scienceand Center for Quantum Information TechnologyPeking UniversityBeijing 100871China State Key Laboratory of Information Photonics and Optical Communications Beijing University of Posts and TelecommunicationsBeijing 100876China

A 459 nm Faraday anomalous dispersion optical filter（FADOF） working at the side wings of the cesium6S1∕2→ 7P1∕2transition with weak oscillator strength is achieved. The transmittance of the higher side wing reaches 98% at a temperature of 179°C and magnetic field above 323 G. The experimental results coincide with the theoretical predictions in 1982 and 1995, which were not realized in experiments for over three decades. Due to its high transmittance, high accuracy, and narrow linewidth, the 459 nm FADOF can be applied in underwater optical communications, the building of active optical clocks, and laser frequency stabilization in active optical clocks.

关键词： FADOF work Faraday anomalous dispersion optical filter at Cs weak 459 nm transition

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An Adaptive Algorithm for Joint Data Detection and Channel Estimation for Meteor Burst communications Based on Per-Survivor Processing

An Adaptive Algorithm for Joint Data Detection and Channel E...

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IEEE Global communications Conference

作者： Zan Li Xiaojun Chen Yuquan Li Norman C. Beaulieu Mohammad S. Obaidat State Key Laboratory of Integrated Service Networks Xidian University China Electronics Systems Engineering Corporation Beijing School of Information and Communication Engineering Beijing University of Posts and Telecommunications Department of Computer and Information Science at Fordham University

ISBN: (纸本)9781479959532

For meteor burst communications (MBC), although per-survivor processing (PSP) based on joint data and channel estimation provides superior performance and robustness for meteor burst communications (MBC), great computational complexity constrains its application in practice. On this occasion, a dimension-down PSP (D-PSP) algorithm and a adaptive state reduction of PSP (ASRP) algorithm are proposed to curve this problem in this paper. On the basis of this, the adaptive state reduction using a dimension-down PSP (ADPSP) is proposed to combine the advantages of D-PSP and ASRP, which reduces the computational time and memory size for exponentially decaying meteor burst channels and makes maximum likelihood sequence detection (MLSD) possible for adaptive data transmission. Simulation results are presented to validate the theoretical analysis. It is shown that deploying the proposed ADPSP algorithm can achieve a good tradeoff between performance and computational complexity dynamically, and provide reliable data transmission for MBC systems with adaptive coding and modulation.

关键词： Adaptive modulation and coding MBC MLSD Per-survivor processing maximum likelihood sequence detection data detection channel estimation mecarzole MBC State reduction modulation coding REG1A gene Postsynaptic Potentials BPIFA2 gene RIDA gene data transmission dimensions Self tuning Adaptive algorithms

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Towards inter-vehicle communication strategies for platooning support 7

Towards inter-vehicle communication strategies for platoonin...

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2014 7th International Workshop on communication Technologies for Vehicles, Nets4Cars-Fall 2014

作者： Segata, Michele Bloessl, Bastian Joerer, Stefan Sommer, Christoph Gerla, Mario Cigno, Renato Lo Dressler, Falko Computer and Communication Systems Institute of Computer Science University of Innsbruck Austria Systems and Networks Dept. of Information Engineering and Computer Science University of Trento Italy Distributed Embedded Systems Institute of Computer Science University of Paderborn Germany Dept. of Computer Science University of California Los AngelesCA United States

ISBN: (纸本)9781479952700

Platooning, the idea of cars autonomously following their leaders to form a road train, has huge potentials to improve traffic flow efficiency and, most importantly, road traffic safety. Wireless communication is a fundamental building block - it is needed to manage and to maintain the platoons. To keep the system stable, strict constraints in terms of update frequency and reliability must be met. We developed communication strategies by explicitly taking into account the requirements of the controller, exploiting synchronized communication slots as well as transmit power adaptation. The proposed approaches are compared to two state of the art adaptive beaconing protocols that have been designed for generic message dissemination. Our simulation models have been parametrized and validated by means of real-world experiments. We clearly show how taking into account specific requirements can be extremely beneficial even in very crowded freeway scenarios. © 2014 IEEE.

关键词： Roads and streets

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Impact of intermediate layer on quality of experience of HTTP adaptive streaming

Impact of intermediate layer on quality of experience of HTT...

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International Conference on Network and Service Management

作者： Michael Seufert Tobias Hossfeld Christian Sieber Institute of Computer Science University of Würzburg Würzburg Germany Chair of Modeling of Adaptive Systems Universitat Duisburg-Essen Duisburg Nordrhein-Westfalen DE Institute for Communication Networks Technische Universität München Munich Germany

ISBN: (纸本)9781467378574

HTTP Adaptive Streaming (HAS) adapts the video quality to the current network condition by switching between different quality layers. As HAS was shown to perform better than classical video streaming, it is becoming increasingly popular. Recent research showed that quality switch amplitude and time on layer have an impact on the Quality of Experience (QoE) of HAS. However, those studies focused only on adaptation between two layers so far. This work extends these findings by taking adaptation between three layers into account. Thereby, especially the impact of an intermediate layer on user perceived quality is investigated. Crowdsourcing experiments were conducted in order to collect subjective ratings for adaptation between three layers. The results indicate that the quality of each layer and the time on each layer are important QoE parameters. This encourages the usage of temporal pooling approaches for QoE prediction and QoE-aware traffic management. Therefore, mean pooling of per-frame metrics will be applied and its performance will be validated with the subjective crowdsourcing results.

关键词： Crowdsourcing Switches Streaming media Adaptation models Video recording Quality assessment Measurement

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Ultra compact and low loss multimode interferenc splitter for arbitrary power splitting 11

Ultra compact and low loss multimode interferenc splitter fo...

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11th International Conference on Group IV Photonics, GFP 2014

作者： Deng, Qingzhong Li, Xinbai Chen, Ruobing Zhou, Zhiping State Key Laboratory of Advanced Optical Communication Systems and Networks School of Electronics Engineering and Computer Science Peking University Beijing China

Arbitrary power splitting ratio is obtained by an 1-to-2 asymmetric multimode interference splitter. The dimension of the multimode section is less than 1.5μm × 3μm while the excess loss is lower than 0.15 dB.

ISBN: (纸本)9781479922833

关键词： arbitrary-ratio power splitter multimode interference Silicon photonics

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Silicon modulators for advanced optical communications

Silicon modulators for advanced optical communications

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Asia communications and Photonics Conference, ACPC 2014

作者： Zhou, Zhiping Li, Tiantian Wang, Dan Zhang, Junlong Zhang, Fan Wang, Xingjun Wu, Hequan State Key Laboratory of Advanced Optical Communication Systems and Networks School of Electronics Engineering and Computer Science Peking University Beijing100871 China

Silicon Mach-Zehnder modulators were used in IM-DD advanced optical communications. 6.25 Gbaud Nyquist-16, 32 and 64-Quadrature Amplitude Modulation optical signals were generated. 160 km transmission of 100 Gb/s WDM ... 详细信息

ISBN: (纸本)9781557528520

关键词： Optical communication

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Wavelength and time slot assignment scheme for TWDM-PONs based on inter-ONU priority rating

Wavelength and time slot assignment scheme for TWDM-PONs bas...

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Asia communications and Photonics Conference, ACPC 2014

作者： Tang, Ruizhi Chen, Xin Lin, Bangjiang Zhu, Paikun Li, Juhao Chen, Zhangyuan He, Yongqi State Key Laboratory of Advanced Optical Communication Systems and Networks School of Electronic Engineering and Computer Science Peking University Beijing100871 China

We propose a dynamic wavelength and time slot assignment scheme for TWDM-PON based on inter-ONU priority rating. Simulation results show that the time delay and packet loss ratio are reduced compared with conventional... 详细信息

ISBN: (纸本)9781557528520

关键词： Passive optical networks

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Widely tunable dual loop optoelectronic oscillator based on a single-bandpass microwave photonic filter and a recirculating delay line

Widely tunable dual loop optoelectronic oscillator based on ...

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Asia communications and Photonics Conference, ACPC 2014

作者： Peng, Huanfa Xie, Xiaopeng Zhang, Cheng Sun, Tao Guo, Peng Chen, Feiya Zhu, Lixin Hu, Weiwei Chen, Zhangyuan State Key Laboratory of Advanced Optical Communication Systems and Networks School of Electronics Engineering and Computer Science Peking University Beijing100871 China

A wideband tunable dual loop Optoelectronic Oscillator based on a single-bandpass microwave photonic filter and a recirculating delay line is proposed and experimentally demonstrated. A tunable frequency range from 10... 详细信息

ISBN: (纸本)9781557528520

关键词： Bandpass filters

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

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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

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A Computationally Inexpensive Battery Model for the Microscopic Simulation of Electric Vehicles

A Computationally Inexpensive Battery Model for the Microsco...

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IEEE Vehicular Technology Conference

作者： Sebastian Schellenberg Rudiger Berndt David Eckhoff Reinhard German Computer Networks and Communication Systems Dept. of Computer Science University of Erlangen

ISBN: (纸本)9781479944484

The transition from classic combustion engine vehicles to electric vehicles is a major step to reduce worldwide CO_2 emissions. In order to correctly and efficiently investigate impacts on the electric grid and the dimensioning of charging infrastructure, or to explore new technologies for a further increase of the driving range, realistic simulation models are required. In this paper, we present an accurate yet computationally inexpensive battery and kinematic model to be used in microscopic traffic simulation to help study the performance of thousands of electric vehicles. Our model also supports recuperation and range extender modules while only relying on the vehicle's speed and a set of constant predefined parameters. It can therefore be easily coupled with current sophisticated traffic simulators. We show its applicability and correctness regarding the State of Charge and power flows using comprehensive real-life experiments.

关键词： Electromobility IVC Lithium-ion battery model

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