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Health Monitoring of Long-Haul Fiber communication System Using Chaotic OTDR

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China communications 2020年第5期17卷 1-11页

作者： Mengmeng Chen Mingjiang Zhang Shaoxiang Chen Jianguo Zhang Senlin Yan Yuncai Wang School of Electronic Engineering Nanjing Xiaozhuang UniversityNanjing 211171China Key lab of Advanced Transducers and Intelligent Control Systems Ministry of Education and Shanxi ProvinceTaiyuan 030024China Institute of Optoelectronic Engineering College of Physics&OptoelectronicsTaiyuan University of TechnologyTaiyuan 030024China School of Electrical and Electronic Engineering The Photonics InstituteNanyang Technological University639798Singapore School of Information Engineering Guangdong University of TechnologyGuangzhou 510006China

A novel chaotic optical time-domain reflectometry(OTDR)-based approach was proposed for monitoring long-haul fiber communication systems with multiple fiber segments. The self-phase modulation and group velocity dispersion effects of the optical cable was considered in demonstrating the proof-of-concept experiment and simulation. In experiments, the correlation peaks are clearly obtained from the correlation trace between the reference and reflected(or scattered) light signals propagating in three optical-fiber segments. The technique affords a high spatial resolution of 2 m, and further long-haul fiber simulations indicate that the sensing distance can be more than 3300 km. Thus, the new proposed technique can be effectively applied for health monitoring of long-haul fiber communication systems.

关键词： fiber communication system chaotic signal optical time domain reflectometry

MMLUP: Multi-Source & Multi-Task Learning for User Profiles in Social Network

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Computers, Materials & Continua 2019年第9期61卷 1105-1115页

作者： Dongjie Zhu Yuhua Wang Chuiju You Jinming Qiu Ning Cao Chenjing Gong Guohua Yang Helen Min Zhou School of Computer Science and Technology Harbin Institute of TechnologyWeihai264209China College of Information Engineering Sanming University365004SanmingChina Fujian Province University Key lab for Industry Big Data Analysis and Application FujianChina College of Information Engineering Qingdao Binhai UniversityQingdaoChina Jiangsu Province Wireless Sensing System Application Engneering Technology Research and Development Centre China School of Engineering Manukau Institute of TechnologyAuckland2241New Zealand

With the rapid development of the mobile Internet,users generate massive data in different forms in social network every day,and different characteristics of users are reflected by these social media *** to integrate multiple heterogeneous information and establish user profiles from multiple perspectives plays an important role in providing personalized services,marketing,and recommendation *** this paper,we propose Multi-source&Multi-task Learning for User Profiles in Social Network which integrates multiple social data sources and contains a multi-task learning framework to simultaneously predict various attributes of a ***,we design their own feature extraction models for multiple heterogeneous data ***,we design a shared layer to fuse multiple heterogeneous data sources as general shared representation for multi-task ***,we design each task’s own unique presentation layer for discriminant output of ***,we design a weighted loss function to improve the learning efficiency and prediction accuracy of each *** experimental results on more than 5000 Sina Weibo users demonstrate that our approach outperforms state-of-the-art baselines for inferring gender,age and region of social media users.

关键词： User profiles multi-source multi-task learning social network

Design and implementation of real-time high definition aerial camera based on ADSP-BF561

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Chinese Optics Letters 2012年第B6期10卷 107-110页

作者：邓家军云利军石俊生王坤伍明华 Color & Image Vision lab. Yunnan Normal University Kunming 650500 China College of Information Yunnan Normal University Kunming 650500 China Huanan Photoelectric (Croup) Co. Ltd of Hunan Changde 415105 China

To meet application requirements of high resolution and high frame rate for the aerial camera, a real-time high definition （HD） aerial camera imaging system is designed and developed. A KAI-01050 charge-coupled device （CCD）, ADSP-BF561, and AD9920A are used in the system. ADSP-BF561 is used to configure registers of AD9920A for generating the timing-driven signals to meet CCD parameter needs, and image stitching through ping-pong operation of collected video signals is achieved, then the image is displayed correctly. In the end, the system is developed, 1 M pixels and 60 frame rate are realized, and running results on the system verify effectiveness of the design program.

关键词： 110.0110 Imaging systems 040.1520 CCD, charge-coupled device 040.7290 Video 100.2000 digital image processing

Consensus-Based Distributed Control for Reactive Power Sharing in Autonomous Microgrid under communication Noises

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Consensus-Based Distributed Control for Reactive Power Shari...

16-channel photonic–electric co-designed silicon transmitter with ultra-low power consumption

第37届中国控制会议

作者： Yuyang Wang Laijun Chen Chunlai Li Tianwen Zheng Libing Yang Shengwei Mei State Key lab of Power System Department of Electrical Engineering Tsinghua University Qinghai Key lab of Efficient Utilization of Clean Energy (Qinghai University Tus-Institute for Renewable Energy) Key laboratory of Photovoltaic Power Generation and Grid-connected Technology (Qinghai Electrical Power Research Institute Qinghai Electric Power Corporation)

Distributed control relies on communication network among distributed generators（DGs）, which is commonly influenced by noises. Furthermore, reactive power deviations may be deteriorated under different communication noises. In this paper, an improved consensus-based distributed control considering communication noises is developed in AC autonomous microgrids, which is capable of attenuating the impact of noises. The traditional consensus-based distributed control is introduced and noises are also considered in traditional control. In order to attenuate the influence of noises, a consensus gain function is involved, which can attenuate the impacts in reactive power sharing. By using this proposed method, the proportional reactive power sharing is achieved under noises. Simulation results verify the effectiveness of the proposed method.

关键词： microgrid distributed control reactive power sharing consensus gain function communication noises

来源： cnki会议评论

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Photonics Research 2023年第2期11卷 143-149页

作者： JINGBO SHI MING JIN TAO YANG HAOWEN SHU FENGHE YANG HAN LIU YUANSHENG TAO JIANGRUI DENG RUIXUAN CHEN CHANGHAO HAN NAN QI XINGJUN WANG State Key laboratory of Advanced Optical communication Systems and Networks School of ElectronicsPeking UniversityBeijing 100871China College of Engineering Peking UniversityBeijing 100871China Peking University Yangtze Delta Institute of Optoelectronics Nantong 226010China State Key laboratory of Superlattices and Microstructures Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China Center of Material Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China Frontier Science Center for Nano-optoelectronics Peking UniversityBeijing 100871China

A hybrid integrated 16-channel silicon transmitter based on co-designed photonic integrated circuits(PICs) and electrical chiplets is demonstrated. The driver in the 65 nm CMOS process employs the combination of a distributed architecture, two-tap feedforward equalization(FFE), and a push–pull output stage, exhibiting an estimated differential output swing of 4.0V_(pp). The rms jitter of 2.0 ps is achieved at 50 Gb/s under nonreturnto-zero on–off keying(NRZ-OOK) modulation. The PICs are fabricated on a standard silicon-on-insulator platform and consist of 16 parallel silicon dual-drive Mach–Zehnder modulators on a single chip. The chip-on-board co-packaged Si transmitter is constituted by the multichannel chiplets without any off-chip bias control, which significantly simplifies the system complexity. Experimentally, the open and clear optical eye diagrams of selected channels up to 50 Gb/s OOK with extinction ratios exceeding 3 dB are obtained without any digital signal processing. The power consumption of the Si transmitter with a high integration density featuring a throughput up to 800 Gb/s is only 5.35 p J/bit, indicating a great potential for massively parallel terabit-scale optical interconnects for future hyperscale data centers and high-performance computing systems.

关键词： channel power return

Full-duplex transmission of IEEE 802.11ac-compliant MIMO WLAN signals over a 2-km 7-core fiber

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Chinese Optics Letters 2017年第1期15卷 50-54页

作者：樊宇婷李建强雷艺唐明尹飞飞戴一堂徐坤 State Key laboratory of Information Photonics and Optical communications Beijing University of Posts and Telecommunications Wuhan National lab for Optoelectronics (WNLO) & National Engineering laboratory for Next Generation Internet Access System School of Optical and Electronic InformationHuazhong University of Science and Technology (HUST)

In this Letter, we experimentally demonstrate a full-duplex transmission system of IEEE 802.11ac-compliant multiple-input multiple-output （MIMO） signals over a 2-kin 7-core fiber for in-building wireless local-area net- work （WLAN） distributed antenna systems. For full-duplex 3 x 3 MIMO demonstration, the crosstalk impacts of both fiber-transmission-only and optic-wireless transmission situation are evaluated. The results indicate that the impact of crosstalk on radio-over-fiber （ROF） link performance is not significant and the quality of the cascaded multi-core fiber and wireless channel is mainly determined by the wireless part. To further improve the system capacity, polarization multiplexing （PolMux） technology is employed to achieve a full-duplex 6 × 6 MIMO over a single 7-core fiber. Although employing the PolMux method will slightly decrease the EVM and condition number performance as opposed to a non-PolMux MCF system, it is still a competitive solution in large optical connection demand scenarios that require a low cost.

关键词： Channel capacity Crosstalk Fibers Number theory Optical communication Radio over fiber Wireless local area networks (WLAN)

Classification evolution algorithm based on cloud model

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通讯和计算机（中英文版） 2009年第10期6卷 8-16页

作者： LI He-song ZHANG Guang-wei LI De-yi LI Xiang-mei State Key lab of Software Development Environment Beihang University Beijing 100083 Branch bureau 27th Mailbox 15th 2# Lanzhou 732750 China

As an important branch of Knowledge Discovery, the task of Data Classification is to determine the objects that belong to which pre-defined goals[1]. As evolutionary computation does not require priori assumptions, it shows great vitality in dealing with imprecise, incomplete and uncertain information, which the traditional methods of statistical classifications are helpless in the classification issues. This paper presents a classification algorithm based on cloud model and genetic algorithm. Experiments show that the algorithm is efficient to continuous attribute data sets for the classification.

关键词：数据分类进化算法云模型知识发现进化计算分类问题传统方法统计分类

Healthcare Application:An Analysis of Reception Studies in Interactive digital Television

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Journalism and Mass communication 2019年第5期9卷 235-242页

作者： Alexandre Kieling Amanda Caroline Rodrigues élida Borges Jhéssika Almeida Watson Odilon áulus Diniz Diogo Caetano Kênia Freitas Catholic University BrasíliaBrazil Brasilia University BrasíliaBrazil communication Paulista State University Julio Mesquita BauruBrazil

This paper presents a healthcare application for Brazilian digital television,its main purposes and its reception tests with end *** is an applied research for testing the scope of the Global ITV project funded by the Brazilian National Council for Scientific and Technological Development(CNPq)and the European community which has developed a hybrid broadband and broadcasting platform.

关键词： interactive digital television TV application healthcare Ginga ecosystem Global ITV project

Traffic sign vandalism and demographics of local population:A case study in Utah

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Journal of Traffic and Transportation Engineering(English Edition) 2016年第3期3卷 192-202页

作者： Majid Khalilikhah Kevin Heaslip Kathleen Hancock Smart Urban Mobility lab Virginia Polytechnic Institute and State UniuersityFalls ChurchVA 22043USA Department of Civil&Environmental Engineering Virginia Polytechnic Institute and State UniversityArlingtonVA 22203USA Department of Civil&Environmental Engineering Virginia Polytechnic Institute and State UniversityFalls ChurchVA 22043USA

Among the different types of traffic sign damage, vandalism is exclusively caused by humans. Traffic sign vandalism is a serious concern, since it can lead to an increase in unsafe driving behaviors. In addition, it results in increased costs to transportation agencies to replace, repair, or maintain the vandalized signs. This paper examines the association between the local population demographics and traffic sign vandalism rates in the State of Utah. To accomplish this goal, sign data of over 97,000 traffic signs across Utah were digitally collected by an equipped vehicle. Sign damage data were obtained from the inspection of daytime digital images taken of each individual sign. Demographic data of Utah＇s counties, including population density, ethnicity, age, income, education, and gender, were obtained from the U.S. Census. The association between demographic groups and vandalism rates was tested using chi-square and trend tests. The results reveal that the most statistically significant variables comprise median household income, completion of at least an associate degree, and population density. According to the fitted linear regression model, a relationship exists between sign vandalism rate and local population demographic. The findings of this investigation can assist transportation agencies in identifying areas with a higher likelihood of sign vandalism, based on demographic characteristics. Such information can then be used to encourage scheduled sign inspections and to implement various countermeasures to prevent sign vandalism.

关键词： Traffic sign vandalism Mobile-based data collection Demographics Statistical methods