检索结果-内蒙古大学图书馆

2nd ACM SIGSPATIAL International Workshop on Mobile Geographic Information systems, MobiGIS 2013, held in conjunction with the 21st ACM SIGSPATIAL International Conference on Advances in Geographic Information systems, GIS 2013

作者： Gong, Wenjuan Chen, Xiaming Qiang, Siwei Jin, Yaohui State Key Lab of Advanced Optical Communication System and Network Shanghai China Shanghai Jiao Tong University Shanghai China

ISBN: (纸本)9781450325318

Mobile devices equipped with geo-location modules facilitate researches on the nature of human mobility. While valuable contributions have been made to discover trajectory patterns from movement history, there are still not a comparative amount of works specialized in analyzing how trajectory patterns change over time. In this paper, we facilitate this problem in a systematic and quantified manner as identifying potential change points of user trajectory patterns extracted from successive time intervals. Specifically, we present a unified, information-based measure to quantify pattern changes between two intervals, and perform a Bayesian analysis on a sequence of aggregate measures for each individual interval to detect the actual change points. Experimenting on a three-month long dataset in real campus WiFi networks, we show that our approach is effective to identify trajectory pattern changes in practice with a discussion on the impact of internal parameters of proposed model on detection performance. Furthermore, we also inspect external factors influencing user mobility in reality by associating trajectory pattern changes with public events, and there shows an interesting connection between group pattern changes and real-world principles such as the weekday calendar or public events such as the May Day holiday. © 2013 ACM.

关键词： Trajectories

来源：评论

学校读者我要写书评

暂无评论

Demonstration of ROADM functionality on optical nyquist SCFDE superchannel

Demonstration of ROADM functionality on optical nyquist SCFD...

引用

2013 18th OptoElectronics and communications Conference Held Jointly with 2013 International Conference on Photonics in Switching, OECC/PS 2013

作者： Ding, Rui Zheng, Zhennan Wang, Rongshan Zhang, Tingting Zhang, Fan State Key Lab. of Advanced Optical Communication Systems and Networks Peking University Beijing 100871 China

We experimentally demonstrate reconfigurable optical add-drop multiplexer functionality with less than 0.5-dB error vector magnitude penalty in a Nyquist superchannel system based on single carrier frequency domain eq... 详细信息

ISBN: (纸本)9784885522710

关键词： Frequency domain analysis

来源：评论

学校读者我要写书评

暂无评论

Mitigation of noise spread in CO-SCFDM system using efficient channel estimation

Mitigation of noise spread in CO-SCFDM system using efficien...

引用

Asia communications and Photonics Conference, ACP 2013

作者： Zhu, Paikun Li, Juhao Chen, Yuanxiang Xu, Yingying Lin, Bangjiang Guo, Bingli He, Yongqi Chen, Zhangyuan State Key Lab. of Advanced Optical Communication Systems and Networks Peking University Beijing 100871 China

We present ISFA, TDP and LMMSE-based channel estimation methods for noise spread mitigation in CO-SCFDM system. The simulation results show that LMMSE and TDP method achieves better linear and nonlinear noise toleranc... 详细信息

ISBN: (纸本)9781557529893

关键词： Channel estimation

来源：评论

学校读者我要写书评

暂无评论

A novel centralized scheduling for time-slotted optical burst switching in elastic optical network

A novel centralized scheduling for time-slotted optical burs...

引用

Photonic networks and Devices, networks 2013

作者： Chen, Xin Guo, Bingli Ma, Songwei Zhang, Ping Li, Juhao Chen, Zhangyuan He, Yongqi State Key Lab. of Advanced Optical Communication Systems and Networks Peking University Beijing 100871 China

We proposed a novel centralized scheduling for bandwidth variable time-slotted optical burst switching (CBVTS-OBS) in elastic optical network. Compared with previous schemes, CBVTS-OBS reduces bandwidth blocking ratio... 详细信息

ISBN: (纸本)9781557529817

关键词： optical burst switching

来源：评论

学校读者我要写书评

暂无评论

Experimental demonstration of resource optimization in traffic tracing-based IP/optical convergence network

Experimental demonstration of resource optimization in traff...

引用

Asia communications and Photonics Conference, ACP 2013

作者： Guan, Jing Ma, Songwei Guo, Bingli Li, Juhao Huang, Shanguo Cao, Xiaoyuan Chen, Zhangyuan Li, Zhengbin He, Yongqi State Key Lab. of Advanced Optical Communication Systems and Networks Peking University Beijing China State Key Lab of Information Photonics and Optical Communication Beijing University of Post and Telecommunication Beijing China Photonic Transport Network Laboratory KDDI R and D Laboratories Inc. Fujimino-shi Saitama Japan

A unified cross-layer controller with traffic tracing and dynamic lightpath optimization/reconfiguration capability for IP/optical convergence is experimentally demonstrated. We detail the protocol extensions and veri...

ISBN: (纸本)9781557529893

关键词：

来源：评论

学校读者我要写书评

暂无评论

Atomic population distribution of excited states in He electrodeless discharge lamp

引用

Chinese Optics Letters 2013年第10期11卷 11-14页

作者：陶智明王彦飞张盛楠王东颖洪叶龙庄伟陈景标 State Key Laboratory of Advanced Optical Communication System and Network Institute of Quantum Electronics School of Electronics Engineering and Computer SciencePeking University Department of Physics Bijie University

Population ratios between excited states are measured to build the excited state Faraday anomalous dispersion optical filter(ESFADOF). We calculate these values between the excited states according to the spontaneous transition probabilities using rate equations and the measured intensities of fluorescence spectral lines of He atoms in an electrodeless discharge lamp in the visible spectral region from 350 to 730 nm. The electrodeless discharge lamp with populations in excited states can be used to realize the frequency stabilization reference of the laser frequency standard. This lamp can also build ESFADOFs for submarine communication application in the blue-green wavelength to simplify the system without the use of a pump laser.

关键词： rate Atomic population distribution of excited states in He electrodeless discharge lamp

来源：评论

学校读者我要写书评

暂无评论

Atomic population distribution of excited states in He electrodeless discharge lamp

引用

中国光学快报（英文版） 2013年第10期11卷 7-10页

作者： Zhiming Tao Yanfei Wang Shengnan Zhang Dongying Wang Yelong Hong Wei Zhuang Jingbiao Chen State Key Laboratory of Advanced Optical Communication System and Network Institute of Quantum Electronics School of Electronics Engineering and Computer Science Peking University Beijing 100871 China Department of Physics Bijie University Bijie 551700 China State Key Laboratory of Advanced Optical Communication System and Network Institute of Quantum Electronics School of Electronics Engineering and Computer Science Peking University Beijing 100871 China

Population ratios between excited states are measured to build the excited state Faraday anomalous dispersion optical filter (ESFADOF).We calculate these values between the excited states according to the spontaneous transition probabilities using rate equations and the measured intensities of fluorescence spectral lines of He atoms in an electrodeless discharge lamp in the visible spectral region from 350 to 730 *** electrodeless discharge lamp with populations in excited states can be used to realize the frequency stabilization reference of the laser frequency *** lamp can also build ESFADOFs for submarine communication application in the blue-green wavelength to simplify the system without the use of a pump laser.

关键词： 020.0020 Atomic and molecular physics 020.1335 Atom optics 300.6210 Spectroscopy, atomic

来源：评论

学校读者我要写书评

暂无评论

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

引用

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

来源：评论

学校读者我要写书评

暂无评论

optically Active Nanostructured ZnO Films

引用

Angewandte Chemie 2015年第50期127卷

作者： Yingying Duan Lu Han Jialiang Zhang Shunsuke Asahina Zhehao Huang Lin Shi Bo Wang Yuanyuan Cao Yuan Yao Liguo Ma Cui Wang Rina K. Dukor Lu Sun Chun Jiang Zhiyong Tang Laurence A. Nafie Shunai Che School of Chemistry and Chemical Engineering State Key Laboratory of Metal Matrix Composites Shanghai Jiao Tong University 800 Dongchuan Road Shanghai 200240 (P.R. China) http://*** SMBU JEOL Akishima Tokyo 196‐8558 (Japan) Key Laboratory of Nanosystem and Hierarchical Fabrication Chinese Academy of Sciences National Center for Nanoscience and Technology No.11 Beiyitiao Zhongguancun Beijing 100190 (P. R. China) BioTools Inc. 17546 Bee Line Hwy Jupiter FL 33458 (USA) School of Electronic Information and Electrical Engineering State Key Laboratory of Advanced Optical Communication System and Network Shanghai Jiao Tong University 800 Dongchuan Road Shanghai 200240 (P.R. China) Department of Chemistry Syracuse University Syracuse NY 13244 (USA)

Inorganic nanomaterials endowed with hierarchical chirality could open new horizons in physical theory and applications because of their fascinating properties. Here, we report chiral ZnO films coated on quartz substrates with a hierarchical nanostructure ranging from atomic to micrometer scale. Three levels of hierarchical chirality exist in the ZnO films: helical ZnO crystalline structures that form primary helically coiled nanoplates, secondary helical stacking of these nanoplates, and tertiary nanoscale circinate aggregates formed by several stacked nanoplates. These films exhibited optical activity (OA) at 380 nm and in the range of 200–800 nm and created circularly polarized luminescence centered at 510 nm and Raman OA at 50–1400 cm −1 , which was attributed to electronic transitions, scattering, photoluminescent emission, and Raman scattering in a dissymmetric electric field. The unprecedented strong OA could be attributed to multiple light scattering and absorption‐enhanced light harvesting in the hierarchical structures.

关键词： Anorganische Filme Chiralität Lumineszenz Raman‐optische Aktivität Zirkulardichroismus

来源：评论

学校读者我要写书评

暂无评论

Nonreciprocal transmission through grating with magneto-optical substrate

Nonreciprocal transmission through grating with magneto-opti...

引用

Nanophotonics, Nanoelectronics and Nanosensor, N3 2013

作者： Zhu, Haibin Li, Feng Liu, Yajie Jiang, Chun Tang, Bin Zang, Xiaofei College of Mathematics Physics and Information Engineering Jiaxing University Jiaxing 314001 China State Key Laboratory of Advanced Optical Communication System and Networks Shanghai Jiao Tong University Shanghai 200240 China School of Mathematics and Physics Changzhou University Changzhou 213164 China Engineering Research Center of Optical Instrument and System Ministry of Education and Shanghai Key Lab of Modern Optical System University of Shanghai for Science and Technology Shanghai 200093 China

ISBN: (纸本)9781557529763

A double-layer grating structure is proposed, which can show nonreciprocal transmission in near-IR frequency range. The structure is composed of metallic grating with magneto-optical substrate. The nonreciprocity depends on both incidence angle and thickness of the substrate. With proper conditions, the nonreciprocity is as high as 57.6%. © OSA 2013.

关键词： Light transmission

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：