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china Communications 2024年第6期21卷 1-22页

作者： Wang yi Wei Zhiqing feng Zhiyong Yangtze Delta Region Institute(Quzhou) University of Electronic Science and Technology of ChinaQuzhou 324003China School of Information and Communication Engineering University of Electronic Science and Technology of ChinaChengdu 611731China Key Laboratory of Universal Wireless Communications Ministry of EducationBeijing University of Posts and TelecommunicationsBeijing 100876China

Communicating on millimeter wave(mmWave)bands is ushering in a new epoch of mobile communication which provides the availability of 10 Gbps high data rate ***,mmWave links are easily prone to short transmission range communication because of the serious free space path loss and the blockage by *** overcome these challenges,highly directional beams are exploited to achieve robust links by hybrid *** aligning the transmitter and receiver beams,*** training,is vitally important to high data rate ***,it may cause huge overhead which has negative effects on initial access,handover,and ***,the mobility patterns of users are complicated and dynamic,which may cause tracking error and large tracking *** efficient beam tracking method has a positive effect on sustaining robust *** article provides an overview of the beam training and tracking technologies on mmWave bands and reveals the insights for future research in the 6th Generation(6G)mobile ***,some open research problems are proposed to realize fast,accurate,and robust beam training and *** hope that this survey provides guidelines for the researchers in the area of mmWave communications.

关键词： 6G beam tracking beam training beamforming mmWave

Behaviour recognition based on the integration of multigranular motion features in the Internet of Things

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Digital Communications and Networks 2024年第3期10卷 666-675页

作者： Lizong Zhang yiming Wang Ke Yan yi Su Nawaf Alharbe Shuxin feng School of Computer Science and Engineering University of Electronic Science and Technology of ChinaChengdu611731China beijing Institute of Remote Sensing Equipment Beijing100039China Applied College Taibah UniversityMedina42353Saudi Arabia

With the adoption of cutting-edge communication technologies such as 5G/6G systems and the extensive development of devices,crowdsensing systems in the Internet of Things(IoT)are now conducting complicated video analysis tasks such as behaviour *** applications have dramatically inc.eased the diversity of IoT ***,behaviour recognition in videos usually requires a combinatorial analysis of the spatial information about objects and information about their dynamic actions in the temporal *** recognition may even rely more on the modeling of temporal information containing short-range and long-range motions,in contrast to computer vision tasks involving images that focus on understanding spatial ***,current solutions fail to jointly and comprehensively analyse short-range motions between adjacent frames and long-range temporal aggregations at large scales in *** this paper,we propose a novel behaviour recognition method based on the integration of multigranular(IMG)motion features,which can provide support for deploying video analysis in multimedia IoT crowdsensing *** particular,we achieve reliable motion information modeling by integrating a channel attention-based short-term motion feature enhancement module(CSEM)and a cascaded long-term motion feature integration module(CLIM).We evaluate our model on several action recognition benchmarks,such as HMDB51,Something-Something and *** experimental results demonstrate that our approach outperforms the previous state-of-the-art methods,which confirms its effective-ness and efficiency.

关键词： Behaviour recognition Motion features Attention mechanism Internet of things Crowdsensing

Prevalence and Genomic Characterization of Multidrug-Resistant Salmonella enterica Serovar Kentucky Sequence Type 198 Circulating—beijing Municipality,china,2016–2023

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china CDC weekly 2024年第33期6卷 825-833页

作者： Mei Qu ying Huang Bing Lyu Xin Zhang yi Tian Zhaomin feng Zhiyong Gao Daitao Zhang beijing Key Laboratory of Diagnostic and Traceability technologies for Food Poisoning Beijing Center for Disease Prevention and ControlBeijingChina

Introduction Highly fluoroquinolone-resistant Salmonella enterica serovar Kentucky(***)of sequence type(ST)198 has emerged as a global multidrug-resistant(MDR)clone,posing a threat to public *** Whole genome sequencing and antibiotic susceptibility testing was used to characterize the population structure and evolutionary history of 54 *** isolates recovered from food and human clinical cases in beijing from 2016 to *** All 54 *** ST198 isolates exhibited resistance to quinolones,carrying point mutations in the quinolone resistance-determining regions(gyrA_S83F and parC_S80I).Resistance to other antibiotics(folate pathway inhibitors,cephems,aminoglycosides,phenicols,rifamycin,fosfomycin,macrolides,and tetracyclines),mediated by the sul1,sul2,dfrA14,blaCTX-M,blaTEM-1B,aac(3)-Id,aadA2,aadA7,aph(3')-I,aph(3'')-Ib,rmtB,floR,arr-2,fosA,mph(A),and tet(A)genes,was also observed in different *** beijing *** ST198 evolutionary tree was divided into clades 198.2-1 and 198.2-2,which were further differentiated into three subclades:198.2-2A,198.2-2B,and *** with the extended-spectrumβ-lactamase-encoding gene blaCTX-M-14b in 198.2-1,the co-existence of blaCTX-M-55 and blaTEM-1B,as well as chromosomally located qnrS1,was detected in most 198.2-2 isolates,which showed more complex MDR *** ST198 outbreak isolates derived from two predominant clonal sources:198.2-1 with cgST236434 and 198.2-2A with *** The *** population in beijing is genetically diverse,consisting of multiple co-circulating lineages that have persisted sinc. *** surveillance of food and humans will aid in implementing measures to prevent and control the spread of AMR.

关键词： Kentucky predominant Whole

Building a Stronger Foundation for Web3:Advantages of 5G Infrastructure

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ZTE Communications 2024年第2期22卷 3-10页

作者： feng Jianxin PAN yi WU Xiao TripleLab Shenzhen 518000China Shenzhen Institute of Advanced Technology Chinese Academy of SciencesShenzhen 518055China WhiteMatrix inc. Nanjing 210031China

The emergence of Web3 technologies promises to revolutionize the Internet and redefine our interactions with digital assets and *** essay explores the pivotal role of 5G infrastructure in bolstering the growth and potential of *** focusing on several crucial aspects—network speed,edge computing,network capacity,security and power consumption—we shed light on how 5G technology offers a robust and transformative foundation for the decentralized future of the *** to delving into the specifics,we undertake a technical review of the historical progression and development of Internet and telecommunication technologies.

关键词： Web3 5G blockchain decentralized application infrastructure

A seismic elastic moduli module for the measurements of low-frequency wave dispersion and attenuation of fluid-saturated rocks under different pressures

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Petroleum Science 2024年第1期21卷 162-181页

作者： Yan-Xiao He Shang-Xu Wang Gen-Yang Tang Chao Sun Hong-Bing Li San-yi Yuan Xian Wei Li-Deng Gan Xiao-feng Dai Qiang Ge Peng-Peng Wei Hui-Qing Zhang National Key Laboratory of Petroleum Resources and Engineering CNPC Key Lab of Geophysical ExplorationCollege of GeophysicsChina University of Petroleum(Beijing)Beijing102249China School of Resources and Geosciences China University of Mining and TechnologyXuzhou221116JiangsuChina Research Institute of Petroleum Exploration and Development CNPCBeijing100083China beijing Vocational College of Labour and Social Security Beijing100029China Petrochina Dagang Oilfield Exploration and Development Research Institute CNPCTianjin300280China

Knowledge about the seismic elastic modulus dispersion,and associated attenuation,in fluid-saturated rocks is essential for better interpretation of seismic observations taken as part of hydrocarbon identification and time-lapse seismic surveillance of both conventional and unconventional reservoir and overburden performances.A Seismic Elastic Moduli Module has been developed,based on the forced-oscillations method,to experimentally investigate the frequency dependence of Young's modulus and Poisson's ratio,as well as the inferred attenuation,of cylindrical samples under different confining pressure *** with three standard samples showed that the measured elastic moduli were consistent with the published data,indicating that the new apparatus can operate reliably over a wide frequency range of f∈[1-2000,10^(6)]*** Young's modulus and Poisson's ratio of the shale and the tight sandstone samples were measured under axial stress oscillations to assess the frequency-and pressure-dependent *** dry condition,both samples appear to be nearly frequency independent,with weak pressure dependence for the shale and significant pressure dependence for the *** particular,it was found that the tight sandstone with complex pore microstructure exhibited apparent dispersion and attenuation under brine or glycerin saturation conditions,the levels of which were strongly influenced by the inc.eased effective *** addition,the measured Young's moduli results were compared with the theoretical predictions from a scaled poroelastic model with a reasonably good agreement,revealing that the combined fluid flow mechanisms at both mesoscopic and microscopic scales possibly responsible for the measured dispersion.

关键词： Low-frequency measurements Dispersion and attenuation Rock physics Fluid flow

Plant virology in the 21st century in china:Recent advances and future directions

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Journal of Integrative Plant Biology 2024年第3期66卷 579-622页

作者： Jianguo Wu Yongliang Zhang Fangfang Li Xiaoming Zhang Jian Ye Taiyun Wei Zhenghe Li Xiaorong Tao feng Cui Xianbing Wang Lili Zhang Fei Yan Shifang Li Yule Liu Dawei Li Xueping Zhou yi Li State Key Laboratory for Ecological Pest Control of Fujian and Taiwan Crops Vector-borne Virus Research CenterCollege of Plant ProtectionFujian Agriculture and Forestry UniversityFuzhou 350002China State Key Laboratory of Plant Environmental Resilience and Ministry of Agriculture Key Laboratory of Soil Microbiology College of Biological SciencesChina Agricultural UniversityBeijing 100193China State Key Laboratory for Biology of Plant Diseases and Insect Pests Institute of Plant ProtectionChinese Academy of Agricultural SciencesBeijing 100193China State Key Laboratory of Integrated Management of Pest Insects and Rodents Institute of ZoologyChinese Academy of SciencesBeijing 100101China CAS Center for Excellence in Biotic Interactions University of Chinese Academy of SciencesBeijing 100049China State Key Laboratory of Plant Genomics Institute of MicrobiologyChinese Academy of SciencesBeijing 100101China State Key Laboratory of Rice Biology Institute of BiotechnologyZhejiang UniversityHangzhou 310058China Department of Plant Pathology The Key Laboratory of Plant ImmunityNanjing Agricultural UniversityNanjing 210095China State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products Institute of Plant VirologyNingbo UniversityNingbo 315211China MOE Key Laboratory of Bioinformatics Center for Plant BiologySchool of Life SciencesTsinghua UniversityBeijing 100084China State Key Laboratory of Protein and Plant Gene Research School of Life SciencesPeking UniversityBeijing 100871China

Plant viruses are a group of intracellular pathogens that persistently threaten global food *** advances in plant virology have been achieved by Chinese scientists over the last 20 years,inc.uding basic research and technologies for preventing and controlling plant viral ***,we review these milestones and advances,inc.uding the identification of new crop-infecting viruses,dissection of pathogenic mechanisms of multiple viruses,examination of multilayered interactions among viruses,their host plants,and virus-transmitting arthropod vectors,and in-depth interrogation of plantencoded resistance and susceptibility ***,various plant virus-based vectors have also been successfully developed for gene function studies and target gene expression in *** also recommend future plant virology studies in china.

关键词： china emerging plant viruses plant virology plant resistance/susceptibility to viral infection plant-virus transmission vector interactions plant virus-based vectors viral pathogenesis

D-band 4600 m wireless transmission with rates exceeding 100 Gbit/s based on photonics aided technologies

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Science china(Technological Sciences) 2024年第9期67卷 2968-2970页

作者： ZHAO XianMing YU JianJun YANG XiongWei WEI yi LI WeiPing TAN JingWen WANG MingXu ZHANG QiuTong ZHANG Bing BIAN ChengZhen TIAN Peng HAN Yang ZHANG Qingyi YU JianGuo ZHAO feng Harbin Institute of Technology Harbin 150001China Key Laboratory for Information Science of Electromagnetic Waves Fudan UniversityShanghai 200433China School of Electronic Engineering Beijing University of Posts and TelecommunicationsBeijing 100876China School of Automation Xi’an University of Posts and TelecommunicationsXi’an 710121China

With the rise of emerging applications such as artificial intelligence(AI),virtual reality(VR), and short videos, the number of Internet terminals has inc.eased dramatically [1]. According to the Cisco Annual Traffic Survey Report, annual traffic is growing at a compound annual growth rate of 20%[2]. To meet exploding growth in traffic demands, researchers have turned their attention to license-free high-band millimeter wave(MMW), such as W-band(75–110 GHz), D-band(110–170 GHz), and terahertz band(THz) [3,4].

关键词： millimeter exceeding artificial

AI for organic and polymer synthesis

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Science china Chemistry 2024年第8期67卷 2461-2496页

作者： Xin Hong Qi Yang Kuangbiao Liao Jianfeng Pei Mao Chen Fanyang Mo Hua Lu Wen-Bin Zhang Haisen Zhou Jiaxiao Chen Lebin Su Shuo-Qing Zhang Siyuan Liu Xu Huang yi-Zhou Sun Yuxiang Wang Zexi Zhang Zhunzhun Yu Sanzhong Luo Xue-feng Fu Shu-Li You Center of Chemistry for Frontier technologies Department of ChemistryZhejiang UniversityHangzhou 310027China Center of Basic Molecular Science Department of ChemistryTsinghua UniversityBeijing 100084China Guangzhou National Laboratory Guangzhou 510005China Center for Quantitative Biology Academy for Advanced Interdisciplinary StudiesPeking UniversityBeijing 100871China State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular ScienceFudan UniversityShanghai 200433China School of Materials Science and Engineering Peking UniversityBeijing 100871China beijing National Laboratory for Molecular Sciences Center for Soft Matter Science and EngineeringKey Laboratory of Polymer Chemistry and Physics of Ministry of EducationCollege of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871China AI for Science(AI4S)-Preferred Program Shenzhen Graduate SchoolPeking UniversityShenzhen 518055China State Key Laboratory of Chemical Biology Shanghai Institute of Organic ChemistryUniversity of Chinese Academy of SciencesChinese Academy of SciencesShanghai 200032China Department of Chemical Sciences National Natural Science Foundation of ChinaBeijing 100085China State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic ChemistryChinese Academy of SciencesShanghai 200032China

Recent years have witnessed the transformative impact from the integration of artificial intelligence with organic and polymer synthesis. This synergy offers innovative and intelligent solutions to a range of classic problems in synthetic chemistry. These exciting advancements inc.ude the prediction of molecular property, multi-step retrosynthetic pathway planning, elucidation of the structure-performance relationship of single-step transformation, establishment of the quantitative linkage between polymer structures and their functions, design and optimization of polymerization process, prediction of the structure and sequence of biological macromolecules, as well as automated and intelligent synthesis platforms. Chemists can now explore synthetic chemistry with unprecedented precision and efficiency, creating novel reactions, catalysts, and polymer materials under the datadriven paradigm. Despite these thrilling developments, the field of artificial intelligence(AI) synthetic chemistry is still in its infancy, facing challenges and limitations in terms of data openness, model interpretability, as well as software and hardware support. This review aims to provide an overview of the current progress, key challenges, and future development suggestions in the interdisciplinary field between AI and synthetic chemistry. It is hoped that this overview will offer readers a comprehensive understanding of this emerging field, inspiring and promoting further scientific research and development.

关键词： organic synthesis polymer synthesis machine learning prediction chemical database automated synthesis

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立足边疆:西藏媒体融合在地化思考

西藏大学学报（社会科学版） 2024年第2期39卷 218-226页

作者：伊丰曹培鑫西藏民族大学新闻与传播学院陕西咸阳712000 中国传媒大学新闻学院北京100024

中国媒体融合战略实施至今已历经十年。西藏作为边疆地区,新闻传播事业一直落后于全国。然而,媒体融合国家战略的实施使西藏新闻传播事业与其他省份一同站在了新的跑线上。十年来,西藏新闻媒体积极运用新技术赋能内容创新,多元立体的传... 详细信息

中国媒体融合战略实施至今已历经十年。西藏作为边疆地区,新闻传播事业一直落后于全国。然而,媒体融合国家战略的实施使西藏新闻传播事业与其他省份一同站在了新的跑线上。十年来,西藏新闻媒体积极运用新技术赋能内容创新,多元立体的传播体系逐渐成熟。回顾过去、展望未来,如何引领西藏媒体融合纵深发展是亟待思考的问题。基于边疆西藏与内地大部地区之间的社会发展和媒体融合逻辑的差异,用在地化的视角研究西藏媒体融合十年来在体系结构建设和内容生产建设方面的实践,有利于客观认识西藏当下的信息传播现状,也为深化西藏媒体融合指明具有西藏特色的发展方向。同时,西藏媒体融合实践也为中国媒体融合深度探索提供了新的人文视角。

关键词：西藏媒体发展媒体深度融合在地化差异化