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| 1 | Beyond 3G移动通信系统关键技术显示文摘分析了移动通信的发展趋势和组成未来先进移动通信系统的关键技术 .简要介绍了北京邮电大学无线新技术研究室在这些方面所做的研究工作 ,对未来先进移动通信系统做了展望 . | 张平 | 2002 | 北京邮电大学学报2002,25,3: | 70 |
| 2 | A Survey on Terahertz Communications显示文摘With the exponential growth of the data traffic in wireless communication systems, terahertz(THz) frequency band is envisioned as a promising candidate to support ultra-broadband for future beyond fifth generation(5G), bridging the gap between millimeter wave(mmWave) and optical frequency ranges. The purpose of this paper is to provide a comprehensive literature review on the development towards THz communications and presents some key technologies faced in THz wireless communication systems. Firstly, despite the substantial hardware problems that have to be developed in terms of the THz solid state superheterodyne receiver, high speed THz modulators and THz antennas, the practical THz channel model and the efficient THz beamforming are also described to compensate for the severe path attenuation. Moreover, two different kinds of lab-level THz communication systems are introduced minutely, named a solid state THz communication system and a spatial direct modulation THz communication system, respectively. The solid state THz system converts intermediate frequency(IF) modulated signal to THz frequency while the direct modulation THz system allows the high power THz sources to input for approving the relatively long distance communications. Finally, we discuss several potential application scenarios as well as some vital technical challenges that will be encountered in the future THz communications. | Zhi Chen Xinying Ma Bo Zhang Yaxin Zhang Zhongqian Niu Ningyuan Kuang Wenjie Chen Lingxiang Li Shaoqian Li | 2019 | China Communications2019,16,2: | 43 |
| 3 | 劳动、政治与民主--访安东尼奥·奈格里教授显示文摘 | 汪行福 王金林 赵伟 | 2009 | 哲学动态2009,,7: | 15 |
| 4 | Parameters in wind-wave frequency spectra and their bearings on spectrum forms and growth显示文摘The spectrum variance m0, peak frequency ω0 and peakness factor p are expressed in terms of nondimensional fetch and duration by making use of relations which are derived through comparing and analyzing existing empirical formulas for the growth of significant wave height and period. The main features of spectrum growth as specified by these parameters agree with those of the JONS-WAP experiments. For given wind speed and fetch, the high frequency parts beyond the peaks of shallow water spectra almost coincide with that of the corresponding deep water spectrum, whereas the low frequency parts differ appreciably. The method developed in this paper predicts smaller significant wave height as well as smaller wave period for shallow water spectra in contrast to the theoretical result of Kitaigorodskii ef al, in which the peak frequency, and consequently the significant wave period, remains basically unchanged for different water depths. Spectra are further reduced to a form in which only significant wave | Wen Shengchang (S. C. Wen), Zhang Dacuo Guo Peifang, and Chen Bohai Institute of Physical Oceanography, Ocean University of Qingdao (formerly, Shandong College of Oceanography), Qingdao, China | 1989 | Acta Oceanologica Sinica1989,8,1: | 15 |
| 5 | 《变异语用学》介绍显示文摘1.前言《变异语用学:聚焦多中心语言的地域变体》(Variational Pragmatics:A Focus on Regional Varieties in Pluricentric Languages)是2008年John Benjamins出版公司出版的Pragmatics & Beyond New | Klaus P.Schneider Anne Barron 任育新 陈新仁 | 2012 | 当代语言学2012,14,2: | 14 |
| 6 | 发展中国太赫兹高速通信技术与应用的思考显示文摘太赫兹通信是未来移动通信(Beyond 5G)中极具优势的技术途径,也是空间信息网络高速传输的重要技术手段,具有军民融合、协同发展的应用前景。中国太赫兹高速无线通信关键技术已经取得了重要突破,与世界技术水平基本同步。因此,进一步加大力度发展太赫兹高速通信技术,对于中国引领国际高速无线通信技术发展和未来移动通信标准化进程具有重要的战略意义。 | 陈智 张雅鑫 李少谦 | 2018 | 中兴通讯技术2018,24,3: | 13 |
| 7 | Artificial Intelligence-Empowered Resource Management for Future Wireless Communications: A Survey显示文摘How to explore and exploit the full potential of artificial intelligence(AI)technologies in future wireless communications such as beyond 5G(B5G)and 6G is an extremely hot inter-disciplinary research topic around the world.On the one hand,AI empowers intelligent resource management for wireless communications through powerful learning and automatic adaptation capabilities.On the other hand,embracing AI in wireless communication resource management calls for new network architecture and system models as well as standardized interfaces/protocols/data formats to facilitate the large-scale deployment of AI in future B5G/6G networks.This paper reviews the state-of-art AI-empowered resource management from the framework perspective down to the methodology perspective,not only considering the radio resource(e.g.,spectrum)management but also other types of resources such as computing and caching.We also discuss the challenges and opportunities for AI-based resource management to widely deploy AI in future wireless communication networks. | Mengting Lin Youping Zhao | 2020 | China Communications2020,17,3: | 11 |
| 8 | 摩尔定律的过去、现在和未来显示文摘分析研究了半导体技术摩尔定律的过去、现在和未来,重点分析了摩尔定律的产生、发展以及在基础物理、光刻、制造成本及功耗等方面的困难和挑战。同时讨论了'超越摩尔定律'的发展方向、适应领域范围,以及摩尔定律在未来的可能实现方式。 | 戴锦文 缪小勇 | 2015 | 电子与封装2015,15,10: | 10 |
| 9 | High-performance silicon−graphene hybrid plasmonic waveguide photodetectors beyond 1.55μm显示文摘Graphene has attracted much attention for the realization of high-speed photodetection for silicon photonics over a wide wavelength range.However,the reported fast graphene photodetectors mainly operate in the 1.55μm wavelength band.In this work,we propose and realize high-performance waveguide photodetectors based on bolometric/photoconductive effects by introducing an ultrathin wide silicon−graphene hybrid plasmonic waveguide,which enables efficient light absorption in graphene at 1.55μm and beyond.When operating at 2μm,the present photodetector has a responsivity of ~70 mA/W and a setup-limited 3 dB bandwidth of >20 GHz.When operating at 1.55μm,the present photodetector also works very well with a broad 3 dB bandwidth of >40 GHz(setup-limited)and a high responsivity of ~0.4 A/W even with a low bias voltage of−0.3 V.This work paves the way for achieving highresponsivity and high-speed silicon-graphene waveguide photodetection in the near/mid-infrared ranges,which has applications in optical communications,nonlinear photonics,and on-chip sensing. | Jingshu Guo Jiang Li Chaoyue Liu Yanlong Yin Wenhui Wang Zhenhua Ni Zhilei Fu Hui Yu Yang Xu Yaocheng Shi Yungui Ma Shiming Gao Limin Tong Daoxin Dai | 2020 | Light(Science & Applications)2020,9,1: | 10 |
| 10 | 4G通信系统关键技术初探显示文摘本文首先提出了3G系统目前存在的局限性,由此概括介绍了4G的引入及概念,并分别对其可能采用的新技术及网络构架的变动进行了简要介绍。最后对我国即将进行的3G通信系统建设与4G通信系统的关系进行阐述,并对4G的未来做出展望。 | 孙媛 | 2004 | 电信工程技术与标准化2004,17,4: | 9 |
| 11 | 美国Beyond Benign推进高中绿色化学教育的实践与启示显示文摘Beyond Benign是美国的一个推进绿色化学教育的非盈利性组织。从什么是绿色化学、工业中的绿色化学和绿色化学替代实验练习3个方面概述了该组织针对高中师生开展的绿色化学教学方案;从先进绿色化学模块素材开发、志愿者推广、暑期实习生研习、网络研讨会或专题论坛、在线课程培训、绿色化学训练营或实地考察等方面探讨了该组织推进高中绿色化学教育的举措;针对国内中学的绿色化学教育,提出了引导民间力量和民间组织参与绿色化学教育、构建较系统的高中绿色化学教学方案、对高中教师进行绿色化学多样化培训以及引导学生在课外活动和第二课堂中开展绿色化学训练等建议。 | 蔡智君 | 2016 | 化学教育2016,37,23: | 9 |
| 12 | Deep learning in nano-photonics:inverse design and beyond显示文摘Deep learning in the context of nano-photonics is mostly discussed in terms of its potential for inverse design of photonic devices or nano-structures. Many of the recent works on machine-learning inverse design are highly specific, and the drawbacks of the respective approaches are often not immediately clear. In this review we want therefore to provide a critical review on the capabilities of deep learning for inverse design and the progress which has been made so far. We classify the different deep-learning-based inverse design approaches at a higher level as well as by the context of their respective applications and critically discuss their strengths and weaknesses. While a significant part of the community’s attention lies on nano-photonic inverse design, deep learning has evolved as a tool for a large variety of applications. The second part of the review will focus therefore on machine learning research in nano-photonics 'beyond inverse design.' This spans from physics-informed neural networks for tremendous acceleration of photonics simulations, over sparse data reconstruction, imaging and 'knowledge discovery' to experimental applications. | PETER R.WIECHA ARNAUD ARBOUET CHRISTIAN GIRARD OTTO L.MUSKENS | 2021 | Photonics Research2021,9,5: | 8 |
| 13 | B5G系统中基于无线大数据的新兴技术(英文)显示文摘基于无线大数据(WBD)和人工智能(AI)的通信技术(涵盖物理层、网络层和应用层)被认为是最有前景的研究之一.该领域三项有趣的研究工作包括信道建模、大规模接入和网络拓扑设计.信道建模部分从机器学习在无线信道建模中应用的可行方法入手,介绍了参数估计中的主流方法,即信道多径聚类,该方法对于未来的研究具有重要意义.大规模接入部分关注分形现象及其在无线网络中的可能应用,主要研究了分形D2D社交网络的最大容量.网络拓扑设计部分介绍了如何利用移动用户的动态移动性特征来减少超密集网络(UDN)中的无线资源消耗.这些工作被认为是5G后有发展前景的研究领域,无线大数据分析为相关研究的未来工作提供了可能线索. | 张四海 张建华 陈颖 朱近康 | 2018 | 北京邮电大学学报2018,41,5: | 7 |
| 14 | Common-anode LED on a Si substrate for beyond 15 Gbit/s underwater visible light communication显示文摘Visible light communication based on light-emitting diodes(LEDs) has become a promising candidate by providing high data rates, low latency, and secure communication for underwater environments. In this paper,a self-designed common-anode GaN-based five-primary-color LED(RGBYC LED) on a Si substrate is proposed and fabricated. The design of a common anode is used to mitigate the saturation effect for a low-frequency component. Additionally, compared with commercially available LEDs that suffer from nonlinearity distortion,applying the designed LED can provide much better and broader linearity according to the measurement results.Therefore, the modulation depth and system performance can be further improved to implement a high-speed underwater visible light communication(UVLC) system. There is no nonlinearity compensation algorithm applied due to the good linearity of the proposed LED;thus, the offline digital signal processing is simplified. We experimentally demonstrate 14.81 Gbit/s 64 quadrature amplitude modulation(QAM)-discrete multitone(DMT)and 15.17 Gbit/s bit-loading-DMT transmissions through a 1.2-m-long underwater channel based on the proposed RGBYC LED with an intrasymbol frequency-domain averaging channel estimation and zero-forcing equalization.As far as we know, this is the highest data rate for an LED-based UVLC system. | YINGJUN ZHOU XIN ZHU FANGCHEN HU JIANYANG SHI FUMIN WANG PENG ZOU JUNLIN LIU FENGYI JIANG NAN CHI | 2019 | Photonics Research2019,7,9: | 7 |
| 15 | FuTURE B3G研究开发及关键技术进展显示文摘FuTURE计划系“十五”八六三计划面向Beyond3G新一代移动通信研究开发的重大项目。文章在论述了Beyond3G新一代移动通信系统基本需求及所面临的关键问题基础上,简要总结了FuTURE计划启动五年来在无线组网、小区划分与同频覆盖、多址与传输技术、多天线与自适应链路技术以及迭代接收技术等方面所取得的一系列被应用于现场实验系统的创新研究成果。 | 尤肖虎 | 2006 | 移动通信2006,30,6: | 6 |
| 16 | TWO PATTERNS OF EQUATORIAL WARMING ASSOCIATED WITH EL NI(?)O显示文摘A classical model of E1 Nio describes the, evolution of sea surface temperature (SST) variation in the tropical Pacific as follows: The anomalous warm water appears first in the area off the coast of South America and then spreads out westward until it occupies almost the entire eastern and central Pacific, but usually does not go beyond the dateline. | 符淙斌 JOSEPH FLETCHER | 1985 | Chinese Science Bulletin1985,30,10: | 6 |
| 17 | Optical meta-waveguides for integrated photonics and beyond显示文摘The growing maturity of nanofabrication has ushered massive sophisticated optical structures available on a photonic chip.The integration of subwavelength-structured metasurfaces and metamaterials on the canonical building block of optical waveguides is gradually reshaping the landscape of photonic integrated circuits,giving rise to numerous metawaveguides with unprecedented strength in controlling guided electromagnetic waves.Here,we review recent advances in meta-structured waveguides that synergize various functional subwavelength photonic architectures with diverse waveguide platforms,such as dielectric or plasmonic waveguides and optical fibers.Foundational results and representative applications are comprehensively summarized.Brief physical models with explicit design tutorials,either physical intuition-based design methods or computer algorithms-based inverse designs,are cataloged as well.We highlight how meta-optics can infuse new degrees of freedom to waveguide-based devices and systems,by enhancing light-matter interaction strength to drastically boost device performance,or offering a versatile designer media for manipulating light in nanoscale to enable novel functionalities.We further discuss current challenges and outline emerging opportunities of this vibrant field for various applications in photonic integrated circuits,biomedical sensing,artificial intelligence and beyond. | Yuan Meng Yizhen Chen Longhui Lu Yimin Ding Andrea Cusano Jonathan A.Fan Qiaomu Hu Kaiyuan Wang Zhenwei Xie Zhoutian Liu Yuanmu Yang Qiang Liu Mali Gong Qirong Xiao Shulin Sun Minming Zhang Xiaocong Yuan Xingjie Ni | 2021 | Light(Science & Applications)2021,10,12: | 6 |
| 18 | 族性及其在音乐中的体现显示文摘一、族性指谓与蕴含'族性'(ethnicity)—词在西方最早出现于1953年,随后被学界广泛使用。如内森·格拉泽尔和丹尼尔·莫伊尼汉合著的《超越熔炉》(Nathan Glazer,Daniel Moynihan,Beyond the Melting Pot,1963,1970)和《族性:理论与实践》(Ethnicity:Theory and Experience,1975)等,引发学界对“族性”这个词的普遍关注。 | 宋瑾 | 2019 | 音乐研究2019,,1: | 5 |
| 19 | Si-substrate vertical-structure InGaN/GaN micro-LED-based photodetector for beyond 10 Gbps visible light communication显示文摘Visible light communication(VLC)has emerged as a promising communication method in 6G.However,the development of receiving devices is much slower than that of transmitting devices,limited by materials,structures,and fabrication.In this paper,we propose and fabricate an InGaN/GaN multiple-quantum-well-based vertical-structure micro-LED-based photodetector(μPD)on a Si substrate.A comprehensive comparison of the photoelectrical performance and communication performance of three sizes ofμPDs,10,50,and 100μm,is presented.The peak responsivity of all threeμPDs is achieved at 400 nm,while the passband full-widths at half maxima are 87,72,and 78 nm for 10,50,and 100μmμPDs,respectively.The−20 dB cutoff bandwidth is up to 822 MHz for 50μmμPD.A data rate of 10.14 Gbps is experimentally demonstrated by bit and power loading discrete multitone modulation and the proposed digital pre-equalizer algorithm over 1 m free space utilizing the self-designed 4×450μmμPD array as a receiver and a 450 nm laser diode as a transmitter.This is the first time a more than 10 Gbps VLC system has been achieved utilizing a GaN-based micro-PD,to the best of our knowledge.The investigation fully demonstrates the superiority of Si substrates and vertical structures in InGaN/GaNμPDs and shows its great potential for high-speed VLC links beyond 10 Gbps. | JIANYANG SHI ZENGYI XU WENQING NIU DONG LI XIAOMING WU ZIWEI LI JUNWEN ZHANG CHAO SHEN GUANGXU WANG XIAOLAN WANG JIANLI ZHANG FENGYI JIANG SHAOHUA YU NAN CHI | 2022 | Photonics Research2022,10,10: | 5 |
| 20 | COVID-19:A Year Long and Beyond?显示文摘In December 2019,a number of patients with pneumonia of unknown etiology(PUE)were reported in Wuhan,Hubei Province(1).The coronavirus disease 2019(COVID-19),caused by a virus also known as severe acute respiratory syndrome coronavirus-2(SARS-CoV-2),was identified by China in January 2020.On January 30,2020,the World Health Organization(WHO)declared coronavirus a public health emergency of international concern(PHEIC). | George F.Gao | 2021 | China CDC weekly2021,3,8: | 4 |