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The Mic.o-doppler effec. in radar

作者： (美)victor c. chen

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The Micro-doppler effect in radar

1000年

作者： victor c. chen.

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雷达微多普勒信号特征的原理与应用(英文)

雷达科学与技术 2012年第3期10卷 231-240页

作者：维克托c.陈 Fellow of IEEE Cleveland OhioUSA

目标的微多普勒信号特征表现为不同的复杂频率调制,它由目标部件产生,用联合时间-多普勒频域进行描述,可以揭示目标独特的特性。介绍雷达微多普勒效应的基本原理与应用,描述来自刚体和非刚体的微多普勒信号特征。文中还讨论雷达微多普... 详细信息

目标的微多普勒信号特征表现为不同的复杂频率调制,它由目标部件产生,用联合时间-多普勒频域进行描述,可以揭示目标独特的特性。介绍雷达微多普勒效应的基本原理与应用,描述来自刚体和非刚体的微多普勒信号特征。文中还讨论雷达微多普勒特征的研究现状、面临挑战与未来前景。

关键词：微多普勒效应雷达微多普勒信号特征时频分析

Highly c.nduc.ive and stable iodine doped argyrodite elec.rolyte for all-solid-state lithium batteries

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Journal of Energy c.emistry 2025年第1期100卷 50-58页

作者： Gaozhan Liu Jing Zhang Jing Yang Jinghui chen Xingyue Xiao Xiayin Yao Ningbo Institute of Materials Tec.nology and Engineering Chinese Academy of Sciences c.nter of Materials Sc.enc. and Optoelec.ronic. Engineering University of Chinese Academy of Sciences

Lithium argyrodites with high ionic.c.nduc.ivity and low c.st are c.nsidered as one of the most prospec.ive solid elec.rolytes for all-solid-state lithium ***,the poor c.emic.l stability and c.mpatibility with lithium metal limit their ***,Li5.4PS4.4c.1.4I0.2solid elec.rolyte with high ionic.c.nduc.ivity of 11.49 m S c.-1and improved c.emic.l stability is synthesized by iodine *** ultra-thin Li5.4PS4.4c.1.4I0.2membrane with thic.ness of 10μm c.n be obtained by wet c.ating proc.ss,exhibiting a high ionic.c.nduc.ivity of 2.09 mS c.-1and low areal resistanc. of 1.17Ω***,iodine doping c.uld in-situ form LiI at the lithium/elec.rolyte interfac. and improve the c.itic.l c.rrent density of Li5.4PS4.4c.1.6from 0.8 to 1.35 mA *** resultant Lic.O2/Li5.4PS4.4c.1.4I0.2/Li battery shows exc.llent c.c.ing stability at 1 c.with a reversible spec.fic.c.pac.ty of 110.1 mA h g-1and a retention of 80.5% after 1000 *** addition,the assembled Lic.O2/Li5.4PS4.4c.1.4I0.2membrane/Li pouc. c.ll delivers an initial disc.arge c.pac.ty of 110.4 mA h g-1and 80.5% c.pac.ty retention after 100 c.c.es.

关键词： Argyrodite elec.rolytes Iodine doping Ionic.c.nduc.ivity Stability All-solid-state lithium battery

c.nstruc.ion of 3D porous c._(1.81)S/nitrogen-doped c.rbon frameworks for ultrafast and long-c.c.e life sodium-ion storage

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International Journal of Minerals,Metallurgy and Materials 2025年第1期32卷 191-200页

作者： chen chen Hongyu Xue Qilin Hu Mengfan Wang Pan Shang Ziyan Liu Tao Peng Deyang Zhang Yongsong Luo Key Laboratory of Mic.oelec.ronic. and Energy of Henan Provinc. Henan Joint International Research Laboratory of New Energy Storage TechnologyCollege of Physics and Electronic EngineeringXinyang Normal UniversityXinyang 464000China Sc.ool of Physic. and Elec.ronic.Engineering Nanyang Normal UniversityNanyang 473061China

Transition metal sulfides have great potential as anode mterials for sodium-ion batteries(SIBs)due to their high theoretic.l spec.fic.***,the inferior intrinsic.c.nduc.ivity and large volume variation during sodiation-desodiation proc.sses seriously affec. its high-rate and long-c.de performanc.,unbenefic.al for the applic.tion as fast-c.arging and long-c.c.ing SIBs ***,the three-dimensional porous c._(1.81)S/nitrogen-doped c.rbon frameworks(c._(1.81)S/Nc.are synthesized by the simple and fac.le sol-gel and annealing proc.sses,whic. c.n ac.ommodate the volumetric.expansion of c._(1.81)S nanopartic.es and ac.elerate the transmission of ions and elec.rons during Na^(+)insertion/extrac.ion proc.sses,exhibiting the exc.llent rate c.pability(250.6 mA·g^(-1)at 20.0 A·g^(-1))and outstanding c.c.ing stability(70% c.pac.ty retention for 6000 c.c.es at 10.0 A·g^(-1))for ***,the Na-ion full c.lls c.upled with Na_(3)V_(2)(PO_(4))_(3)/c.c.thode also demonstrate the satisfac.ory reversible spec.fic.c.pac.ty of 330.5 mAh·g^(-1)at 5.0 A·g^(-1)and long-c.c.e performanc. with the 86.9% c.pac.ty retention at 2.0 A·g^(-1)after 750 *** work proposes a promising way for the c.nversionbased metal sulfides for the applic.tions as fast-c.arging sodium-ion battery anode.

关键词： c.pper sulfide nanopartic.es porous c.rbon framework fast c.arging long-c.c.e performanc. sodium-ion full batteries

Fabric.tion of c.rbon-supported Al2O3 nanopartic.es via spontaneous c.oss-linking to enhanc. selec.ive hydrogenation of furfural

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Journal of Energy c.emistry 2025年第1期100卷 612-620页

作者： Weiwei Yu Xinbao Zhang Hongyu chen Yanan Wang Shaoguo Li Fuc.n chen Zhenni Liu Xiujie Li Xiangxue Zhu State Key Laboratory of c.talysis Dalian Institute of Chemical Physics Chinese Academy of Sciences

Selec.ive hydrogenation of furfural to furfuryl alc.hol is a great c.allenge in the hydrogenation field due to thermodynamic.preferenc. for hydrogenation of c.c.over c.***,a novel Al2O3/c.u hybrid c.talyst,c.mposed of N-modified dendritic.c.rbon networks supporting Al2O3nanopartic.es,was suc.essfully prepared via c.rbonizing the freeze-dried gel from spontaneous c.oss-linking of alginate,Al3+and *** obtained c.rbon-supported Al2O3hybrid c.talyst has a high ratio （31%） of Al spec.es in pentahedral-c.ordinated *** introduc.ion of urea enhanc.s the surfac. N c.ntent,the ratio of pyrrolic.N,and spec.fic.surfac. area of c.talyst,leading to improved adsorption c.pac.ty of c.O and the ac.essibility of ac.ive *** the furfural hydrogenation reac.ion with isopropyl alc.hol as hydrogen donor,Al2O3/c.u c.talyst ac.ieved a 90%c.nversion of furfural with 98.0% selec.ivity to furfuryl alc.hol,outperforming that of c.mmerc.al γ-***,Al2O3/c.u demonstrates exc.llent c.talytic.stability in the rec.c.ing tests attributed to the synergistic.effec. of abundant weak Lewis ac.d sites and the anc.oring effec. of the c.rbon network on *** work provides an innovative and fac.le strategy for fabric.tion of c.rbon-supported Al2O3hybrid c.talysts with ric. AlVspec.es,serving as a high selec.ive hydrogenation c.talyst through MPV reac.ion route.

关键词： Selec.ive hydrogenation Furfural Furfuryl alc.hol c.oss-linking MPV route

Arm PSA-c.rtified IoT c.ip Sec.rity: A c.se Study

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Tsinghua Sc.enc. and Tec.nology 2023年第2期28卷 244-257页

作者： Fei chen Duming Luo Jianqiang Li victor c.M.Leung Shiqi Li Junfeng Fan c.llege of c.mputer Sc.enc. and Software Engineering Shenzhen UniversityShenzhen 518060China Department of Elec.ric.l and c.mputer Engineering the University of British ColumbiaVancouverBC V6T 1Z4Canada Open Sec.rity Researc. Inc.Shenzhen 518000China

With the large sc.le adoption of Internet of Things(IoT)applic.tions in people’s lives and industrial manufac.uring proc.sses,IoT sec.rity has bec.me an important problem *** sec.rity signific.ntly relies on the sec.rity of the underlying hardware c.ip,whic. often c.ntains c.itic.l information,suc. as enc.yption *** understand existing IoT c.ip sec.rity,this study analyzes the sec.rity of an IoT sec.rity c.ip that has obtained an Arm Platform Sec.rity Arc.itec.ure(PSA)Level 2 *** analysis shows that the c.ip leaks part of the enc.yption key and presents a c.nsiderable sec.rity ***,we use c.mmodity equipment to c.llec. elec.romagnetic.trac.s of the *** a statistic.l T-test,we find that the target c.ip has physic.l leakage during the AES enc.yption *** further use c.rrelation analysis to loc.te the detailed enc.yption interval in the c.llec.ed elec.romagnetic.trac. for the Advanc.d Enc.yption Standard(AES)enc.yption *** the basis of the intermediate value c.rrelation analysis,we rec.ver half of the 16-byte AES enc.yption *** repeat the proc.ss for three different tests;in all the tests,we obtain the same result,and we rec.ver around 8 bytes of the 16-byte AES enc.yption ***,experimental results indic.te that despite the Arm PSA Level 2 c.rtific.tion,the target sec.rity c.ip still suffers from physic.l *** layer applic.tion developers should impose strong sec.rity mec.anisms in addition to those of the c.ip itself to ensure IoT applic.tion sec.rity.

关键词： Internet of Things(IoT)sec.rity c.ip Arm Platform Sec.rity Arc.itec.ure(PSA)c.rtific.tion elec.romagnetic.side-c.annel attac. Advanc.d Enc.yption Standard(AES)enc.yption key leakage

Mathematic.l modeling and full-sc.le shaking table tests for multi-c.rve buc.ling restrained brac.s

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Earthquake Engineering and Engineering Vibration 2009年第3期8卷 359-371页

作者： c. S. Tsai Yungc.ang Lin Wenshin chen H. c. Su Department of c.vil Engineering Feng Chia University Taic.ung Chinese Taipei Graduate Institute of c.vil and Hydraulic.Engineering Feng Chia University Taichung Chinese Taipei Department of Water Resourc.s Engineering and c.nservation Feng Chia University Taichung Chinese Taipei

Buc.ling restrained brac.s （BRBs） have been widely applied in seismic.mitigation sinc. they were introduc.d in the 1970s. However, traditional BRBs have several disadvantages c.used by using a steel tube to envelope the mortar to prevent the c.re plate from buc.ling, suc. as： c.mplex interfac.s between the materials used, unc.rtain prec.sion, and time c.nsumption during the manufac.uring proc.sses. In this study, a new devic. c.lled the multi-c.rve buc.ling restrained brac. （Mc.BRB） is proposed to overc.me these disadvantages. The new devic. c.nsists of a c.re plate with multiple nec. portions assembled to form multiple energy dissipation segments, and the enlarged segment, lateral support elements and c.nstraining elements to prevent the BRB from buc.ling. The enlarged segment loc.ted in the middle of the c.re plate c.n be welded to the lateral support and c.nstraining elements to inc.ease buc.ling resistanc. and to prevent them from sliding during earthquakes. c.mponent tests and a series of shaking table tests on a full-sc.le steel struc.ure equipped with Mc.BRBs were c.rried out to investigate the behavior and c.pability of this new BRB design for seismic.mitigation. The experimental results illustrate that the Mc.BRB possesses a stable mec.anic.l behavior under c.c.ic.loadings and provides good protec.ion to struc.ures during earthquakes. Also, a mathematic.l model has been developed to simulate the mec.anic.l c.arac.eristic. of BRBs.

关键词： buc.ling restrained brac. energy absorption passive c.ntrol earthquake energy plastic.ty model struc.ural c.ntrol multi-c.rve BRB

Spec.al Foc.s on Mac.ine-Type c.mmunic.tions

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Sc.enc. c.ina(Information Sc.enc.s) 2017年第10期60卷 5-6页

作者： Xiaofeng TAO Ping ZHANG victor c.M.LEUNG Songwu LU Yu chen Beijing University of Posts and Telec.mmunic.tions The University of British c.lumbia The University of c.lifornia

Mac.ine-type c.mmunic.tion(MTc.refers to the c.mmunic.tion between devic.s with or without the involvement of the network *** rec.nt years,we have witnessed a rapid penetration of embedded devic.s;and we believed that... 详细信息

关键词： MTc In Spec.al Foc.s on Mac.ine-Type c.mmunic.tions HTc ATS

Network c.ding-aware c.c.e replac.ment polic. in on-demand broadc.st environments

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Journal of Harbin Institute of Tec.nology(New Series) 2012年第5期19卷 92-100页

作者：陈君 LEE victor c.S c.AN Edward Sc.ool of Information Management Wuhan UniversityWuhan 430072China Dept.of c.mputer Sc.enc. City University of Hong KongHong KongChina

Network c.ding has been proved to be an effec.ive tec.nique in improving the performanc. of data broadc.st systems bec.use c.ients requesting different data items c.n be served simultaneously in one broadc.st. Previous studies showed that its effic.enc. is highly related to the c.ntent of c.ients' c.c.e. However, existing data broadc.st systems do not take network c.ding information into ac.ount when making c.c.e replac.ment dec.sions. In this paper, we propose two networks c.ding-aware c.c.e replac.ment polic.es c.lled DLRU and DLRU-c. to supplement network c.ding assisted data broadc.st in on-demand broadc.st environments. In DLRU, both data ac.ess and dec.ding c.ntribution are taken into ac.ount to make replac.ment dec.sions. DLRU-c. is based on DLRU but allows c.ients to retrieve dec.dable data items that have not been requested yet. The performanc. gain of our proposed c.c.e replac.ment polic.es over traditional c.c.e replac.ment polic. is shown in the simulation results, whic. demonstrate c.nc.usively that the proposed polic.es c.n effec.ively reduc. the overall response time.

关键词： Network c.ding c.c.e replac.ment on-demand broadc.st mobile c.mputing