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Frequency offset estimation based on peak power ratio in lte system

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The Journal of China Universities of Posts and Telecommunications 2013年第6期20卷 49-54页

作者： WANG Jun GUAN Bao LIU Shou-yin XIE Wen-wu department of Electronics and Communication Engineering Central China Normal University department of lte Wuhan Hongxin Telecom. Technologies CO.LTD

Orthogonal frequency division multiplexing （OFDM） is one of the key techniques for long term evolution （lte） system. Frequency offset estimation of OFDM is an essential issue. Especially in the high-speed environment, the frequency offset will become large. Based on the features of lte uplink physical random access channel （PRACH）, this paper proposes a new frequency offset algorithm by using peak power ratio to enlarge the range of frequency offset estimation. According to the relation between frequency offset and the power delay profile （PDP）, the ratio of the peak power of the PDP at the main window to that at the negative window or positive window is utilized to estimate frequency offset. Simulation results show that the new proposed algorithm extends the estimation range of frequency offset from 1 000 Hz to 1 250 Hz. Meanwhile the accuracy of frequency offset estimation is almost not lost. Particularly in low signal noise ratio （SNR）, the new algorithm has lower mean square error （MSE） compared with traditional phase differential algorithm.

关键词： frequency offset estimation lte peak power ration PDP

Tectonic evolution of the Dabieshan orogen: In the view from polyphase deformation of the Beihuaiyang metamorphic zone

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Science China Earth Sciences 2005年第7期48卷 886-899页

作者： LIN Wei1, 2, Faure Michel3, WANG Qingchen1 & Arnaud Nicolas4 1. lte, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China 2. department of Earth and Planetary Sciences, Graduate School of Science, Nagoya University, Japan 3. ISTO, UMR CNRS 6113, Batiment Géosciences, Orléans Université d’Orléans, 45067 Orléans Cedex 2, France 4. UMR 6524 "Magmas et Volcans", 5 Rue Kessler, 63000 Clermont-Ferrand, France lte Institute of Geology and Geophysics Chinese Academy of Sciences Beijing 100029 China department of Earth and Planetary Sciences Graduate School of Science Nagoya University Japan ISTO UMR CNRS 6113 Orléans Université d'Orléans 45067 Orléans Cedex 2 France UMR 6524 Magmas et Volcans 63000 Clermont-Ferrand 5 Rue Kessler France

The Beihuaiyang metamorphic zone was formed by the Early Mesozoic collision of the North and South China Blocks. It consisted of the Foziling and Luzhenguan complexes and was thought to have never afforded a deep subduction. A similar feature of the deformation in the Dabieshan UHP metamorphic rocks implies that these different tectonic units share the same geodynamic background. The early stage of deformation can be preserved on account of their relatively shallower subduction than that for UHP rocks. On the basis of an analysis of the geo- logical structure and geochronological results, five deformational stages have been recognized: a D1-Early compressional deformation which represents the continental subduction; a D2-Early exhumation deformation producing a syn-convergence exhumation; a D3-Main deformation, represented by an exhumation deformation with Late Triassic age; a D4-Doming and its margin extensional gravity collapse deformation and finally a D5-regional extensional deformation of Cretaceous that was mostly introduced by the migmatization and plutonism.

关键词： Beihuaiyang metamorphic zone geometry kinematic polyphase deformation tectonic evolution.

Effect of MnO_4^- and silver content on electrochemical behaviour of Pb-Ag alloy anodes during potential decay periods

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Transactions of Nonferrous Metals Society of China 2013年第7期23卷 2174-2180页

作者：张伟涂常青陈艺锋 Houlachi GEORGEOS 肖利湖南工业大学冶金工程学院株洲412007 department of Mining Metallurgy and Material EngineeringLaval UniversitySte-FoyQuebecG1K 7P4Canada 中航工业南方动力机械公司株洲412002 lte Hydro-Quebec600 Avenue de la MortagneC.P.900 ShawiniganQCG9N 7N5Canada

The effect of MnO4- and silver content on electrochemical behaviour of five commercial Pb-Ag alloy anodes was studied in acid zinc sulphate electrolyte with and without MnO4- ions at 38 °C during potential decay periods. When the anodes were immersed into acid zinc sulphate electrolyte without MnO4- ions, the Pb-0.72%Ag anode entered complete passivation state in the shortest time among the five anodes, followed by anodes Pb-0.67%Ag, Pb-0.60%Ag, Pb-0.58%Ag and Pb-0.29%Ag-0.1%Ca by measurement of open circuit potential. During immersion of the anodes, MnO4 ions accelerated the passivation and increased the corrosion current density of the anodes. After immersion in zinc electrolyte with MnO4-, the anode Pb-0.72%Ag had the best corrosion resistance, followed by anodes Pb-0.67%Ag, Pb-0.60%Ag, then the close anodes Pb-0.58%Ag and Pb-0.29%Ag-0.1%Ca by the electrochemical impedance spectroscopy （EIS） analysis.

关键词： electrochemical behaviour Pb-Ag anode permanganate ion potential decay periods zinc sulphate electrolyte

重症监护室护士限制治疗努力的能力:整合性综述

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International Journal of Nursing Sciences 2024年第1期11卷 143-154,I0003页

作者： Elvia R.Lopez-Panza Vanessa C.Pacheco-Roys Kelly J.Fernandez-Ahumada Diana C.Díaz-Mass María Y.Exposito-Concepcion Elizabeth Villarreal-Cantillo Cesar I.Aviles Gonzalez Nursing department Universidad del NorteBarranquillaColombia Nursing Program Faculty of Health SciencesUniversidad Popular del CesarValleduparColombia Clínica Valledupar ValleduparColombia Hospital Universidad del Norte SoledadColombia department of Medical Sciences and Public Health University of CagliariCittadella Universitaria di MonserratoCagliariItaly

目的在重症监护病房(IntensiveCareUnit,ICU),护土难免会遇到需要限制治疗努力(limiting therapeutie efort,lte)的患者,尽管多数护士还缺乏为这些临终患者及其家庭提供支持的准备。本综述旨在描述ICU护士在lte中需要具备的能力。方法对... 详细信息

目的在重症监护病房(IntensiveCareUnit,ICU),护土难免会遇到需要限制治疗努力(limiting therapeutie efort,lte)的患者,尽管多数护士还缺乏为这些临终患者及其家庭提供支持的准备。本综述旨在描述ICU护士在lte中需要具备的能力。方法对2010年--2023年发表的文献进行综述。系统检索了5个数据库:Medline、Wiley Online Library、SciELO、ScienceDirect和Web of Science。使用关键评估项目工具西班牙语版(Critical Appraisal Skills Programme in Spanish,CASPe)作为评判性阅读工具。使用牛津循证医学中心(Center for Evidence-Based Medicine.,CEBM)评估工具确定证据级别和推荐强度。结果共纳入25篇文献。ICU护士lte护理的能力包括对患者的直接护理、以家庭为中心的护理以及护士在团队中的作用。该综述确定了3个类别的能力:作为患者、家庭与跨学科团队之间维护者的能力,在lte方面的决策能力,在患者生命末期治疗和护理干预的能力。结论ICU护士在lte方面需要具备相应的能力,这对患者的生活质量死亡尊严以及患者家庭应对悲伤的全面支持至关重要。

关键词：重症监护家庭支持重症监护病房护士的作用安宁疗护专业能力

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基于增强CVAE的三维射线重构方法

北京邮电大学学报 2022年第5期45卷 36-41页

作者：朱军杨军李凯于文欣安徽大学电子信息工程学院合肥230601 上海科技大学信息科学与技术学院上海201210 华为上海研究所lte公共性能开发部上海201206

射线追踪数据的样本空间不完备性是造成大规模多输入多输出信道幅值预测出现高预测误差用户较多的主要原因。为了更全面地表征所有用户的信道传播特征,提出了一种基于扩展概率分布的条件变分自编码器(CVAE)的三维射线重构方法。该方法... 详细信息

射线追踪数据的样本空间不完备性是造成大规模多输入多输出信道幅值预测出现高预测误差用户较多的主要原因。为了更全面地表征所有用户的信道传播特征,提出了一种基于扩展概率分布的条件变分自编码器(CVAE)的三维射线重构方法。该方法基于用户射线样本的稀疏度选择先验概率分布,通过增强CVAE为高误差用户生成新的射线样本训练集,使射线追踪数据的隐变量分布更符合高误差用户的特征。仿真结果表明,基于所提出的方法在原有射线样本训练集中扩充新样本后,可将高预测误差用户数降低到原来的53.59%;使用新训练集训练的神经网络在得到大幅降低预测信道幅值时间开销的同时,将信道幅值预测精度提升了7.8%。

关键词：大规模多输入多输出三维信道模型条件变分自编码器射线追踪

Joint video adaptation and erasure code for video broadcast in wireless networks

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Science China(Information Sciences) 2013年第10期56卷 102-116页

作者： HE NengQiang ZHANG XueDan LI YiPeng CAO JianNong LI Zhu REN Yong department of Electronic Engineering Tsinghua University department of Automation Tsinghua University department of Computing Hong Kong Polytechnic University

Advances in wireless access technologies such as WiMax and lte have accelerated the development of wireless video *** existing erasure codes are designed for wireless data broadcasting,their potential can only be realized for wireless video broadcasting if the distortions associated with video packets and their complex decoding dependency are taken into *** this paper,we propose the greedy video erasure code(GVEC)to minimize average video distortion by accounting for the temporal scalable decoding dependency among video frames e.g.I,P and B frames in *** is a greedy algorithm and sufers from high computational *** practical implementation,we have designed the joint video adaptation and erasure code(JVEC)with lower complexity,which can generate erasure codes on the fly to guarantee the decoding of important video *** results show that the performance of JVEC is very close to that of GVEC,and is superior to that of existing erasure *** results also show the existence of a performance tradeof between video distortion and video packet throughput.

关键词： wireless video broadcast erasure code video analysis

The ALMA-QUARKS Survey.Ⅱ.The ACA 1.3 mm Continuum Source Catalog and the Assembly of Dense Gas in Massive Star-Forming Clumps

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Research in Astronomy and Astrophysics 2024年第6期24卷 119-139页

作者：许峰玮 Ke Wang Tie Liu Lei Zhu Guido Garay Xunchuan Liu Paul Goldsmith Qizhou Zhang Patricio Sanhueza Shengli Qin Jinhua He Mika Juvela Anandmayee Tej Hongli Liu Shanghuo Li Kaho Morii Siju Zhang Jianwen Zhou Amelia Stutz Neal JEvans Kee-Tae Kim Shengyuan Liu Diego Mardones Guangxing Li Leonardo Bronfman Ken’ichi Tatematsu Chang Won Lee Xing Lu Xiaofeng Mai Sihan Jiao James O.Chibueze Keyun Su Viktor L.Tóth Kavli Institute for Astronomy and Astrophysics Peking UniversityBeijing 100871China department of Astronomy School of PhysicsPeking UniversityBeijing 100871China Shanghai Astronomical Observatory Chinese Academy of SciencesShanghai 200030China Chinese Academy of Sciences South America Center for Astronomy National Astronomical ObservatoriesChinese Academy of SciencesBeijing 100101China Departamento de Astronomía Universidad de ChileLas Condes7591245 SantiagoChile Jet Propulsion Laboratory California Institute of Technology4800 Oak Grove DrivePasadena CA 91109USA Center for Astrophysics|Harvard&Smithsonian 60 Garden StreetCambridgeMA 02138USA National Astronomical Observatory of Japan National Institutes of Natural Sciences2-21-1 OsawaMitakaTokyo 181-8588Japan Astronomical Science Program The Graduate University for Advanced StudiesSOKENDAI2-21-1 OsawaMitakaTokyo 181-8588Japan School of Physics and Astronomy Yunnan UniversityKunming 650091China Yunnan Observatories Chinese Academy of SciencesKunming 650216China department of Physics University of HelsinkiPO Box 64FI-00014 HelsinkiFinland Indian Institute of Space Science and Technology Thiruvananthapuram 695547KeralaIndia Max Planck Institute for Astronomy Königstuhl 17D-69117 HeidelbergGermany department of Astronomy Graduate School of ScienceThe University of Tokyo7-3-1 HongoBunkyo-kuTokyo 113-0033Japan Max-Planck-Institut für Radioastronomie Auf dem Hügel 6953121 BonnGermany Departamento de AstronomÂıa Universidad de ConcepcionCasilla 160-CConcepci onChile department of Astronomy The University of Texas at AustinTexas 78712-1205USA Korea Astronomy and Space Science Institute 776 Daedeokdae-roYuseong-guDaejeon 34055Republic of Korea Institute of Astronomy and Astrophysics Academia SinicaRoosevelt RoadTaipei 10617TaiwanChina South-Western Institute for Astronomy Research Yunnan UniversityKunming 650091China Korea Astronomy and Space Science Institute 776 Daedeok-daeroYuseong-guDaejeon 34055Republic of

Leveraging the high resolution,sensitivity,and wide frequency coverage of the Atacama Large Millimeter/submillimeter Array(ALMA),the QUARKS survey,standing for“Querying Underlying mechanisms of massive star formation with ALMA-Resolved gas Kinematics and Structures”,is observing 139 massive starforming clumps at ALMA Band 6(λ~1.3 mm).This paper introduces the Atacama Compact Array(ACA)7 m data of the QUARKS survey,describing the ACA observations and data *** multiwavelength data,we provide the first edition of QUARKS atlas,offering insights into the multiscale and multiphase interstellar medium in high-mass star *** ACA 1.3 mm catalog includes 207 continuum sources that are called ACA *** gas kinetic temperatures are estimated using three formaldehyde transitions with a non-lte radiation transfer model,and the mass and density are derived from a dust emission *** ACA sources are massive(16–84 percentile values of 6–160 M_(⊙)),gravity-dominated(M∝R^(1.1))fragments within massive clumps,with supersonic turbulence(M>1)and embedded star-forming *** find a linear correlation between the masses of the fragments and the massive clumps,with a ratio of 6%between the *** considering fragments as representative of dense gas,the ratio indicates a dense gas fraction(DGF)of 6%,although with a wide scatter ranging from 1%to 10%.If we consider the QUARKS massive clumps to be what is observed at various scales,then the size-independent DGF indicates a self-similar fragmentation or collapsing mode in protocluster *** the ACA data over four orders of magnitude of luminosity-to-mass ratio(L/M),we find that the DGF increases significantly with L/M,which indicates clump evolutionary *** observed a limited fragmentation at the subclump scale,which can be explained by a dynamic global collapse process.

关键词： stars:formation ISM:kinematics and dynamics ISM:clouds stars:protostars

重症监护室护士限制治疗努力的能力:整合性综述（英文）

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International Journal of Nursing Sciences 2024年第1期 143-154+160页

作者： Elvia R.López-Panza Vanessa C.Pacheco-Roys Kelly J.Fernández-Ahumada Diana C.Díaz-Mass María Y.Expósito-Concepción Elizabeth Villarreal-Cantillo Cesar I.Aviles Gonzalez Nursing department Universidad del Norte Nursing Program Faculty of Health Sciences Universidad Popular del César Clínica Valledupar Hospital Universidad del Norte department of Medical Sciences and Public Health University of Cagliari Cittadella Universitaria di Monserrato

目的在重症监护病房(Intensive Care Unit,ICU),护士难免会遇到需要限制治疗努力(limiting therapeutic effort,lte)的患者,尽管多数护十还缺乏为这些临终患者及其家庭提供支持的准备。本综述旨在描述ICU护士在lte中需要具备的能力。方... 详细信息

目的在重症监护病房(Intensive Care Unit,ICU),护士难免会遇到需要限制治疗努力(limiting therapeutic effort,lte)的患者,尽管多数护十还缺乏为这些临终患者及其家庭提供支持的准备。本综述旨在描述ICU护士在lte中需要具备的能力。方法对2010年—2023年发表的文献进行综述。系统检索了5个数据库:Medline、Wiley Online Library SciELO、ScienceDirect和Web of Science。使用关键评估项目工具西班牙语版(Critical Appraisal Skills Programme in Spanish,CASPe)作为评判性阅读工具。使用牛津循证医学中心(Center for Evidence-Based Medicine,CEBM)评估工具确定证据级别和推荐强度。结果共纳入25篇文献。ICU护士lte护理的能力包括对患者的直接护理、以家庭为中心的护理以及护士在团队中的作用。该综述确定了3个类别的能力:作为患者、家庭与跨学科团队之间维护者的能力,在lte方面的决策能力,在患者生命末期治疗和护理干预的能力。结论 ICU护十在lte方面需要具备相应的能力,这对患者的生活质量、死亡尊严以及患者家庭应对悲伤的全面支持至关重要。

关键词：重症监护家庭支持重症监护病房护士的作用安宁疗护专业能力

Complexity Effective Frequency and Sidelink Synchronization Algorithm for lte Device-to-Device Communication Systems

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Computers, Materials & Continua 2020年第1期62卷 443-458页

作者： Yong-An Jung Min-Goo Kang Young-Hwan You department of Computer Engineering Sejong UniversitySeoulKorea department of IT Contents Hanshin UniversityGyeonggi-doKorea

Device-to-device(D2D)communication is considered as a major challenge in the long term evolution(lte)network wherein devices directly communicate with each *** of the key challenges in D2D sidelink is reliable and reduced-complexity *** address this issue,a computationally efficient sequential detection scheme for integer carrier frequency offset and sidelink identity is proposed in the lte-D2D *** perform the frequency offset detection without retrieving the sidelink identity,the conjugate relation between two primary sidelink synchronization sequences is exploited,which facilitates the detection tasks of frequency offset and sidelink identity to be *** is demonstrated from simulation results that the inherent property of the sidelink synchronization sequences is effectively used for joint detection of frequency offset and sidelink identity with significantly reduced complexity,compared to existing estimation schemes.

关键词： Long term evolution device-to-device communication carrier frequency offset sidelink identity sidelink synchronization