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Effects of ma.eria. a.d Dimension on TCF,Frequency,a.d Q of Ra.ia. Contour mode a.N-on-Si mEmS Resona.ors

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Journa. of Electronic Science a.d Technology 2021年第4期19卷 319-334页

作者： Thi Dep ha with the Fa.ulty of Electronics Technology Industrial University of Ho Chi Minh CityHo Chi Minh City 70000

This pa.er investiga.es the effects of ma.eria. a.d dimension pa.a.eters on the frequency splitting,frequency drift,a.d qua.ity fa.tor(Q)of a.uminium nitride(a.N)-on-n-doped/pure silicon(Si)microelectromechanica. systems(mEmS)disk resona.ors through a.a.ysis a.d *** pa.a.eters include the crysta.logra.hic orienta.ion,dopa.t,substra.e thickness,a.d *** resona.ors opera.e in the elliptica.,higher order,a.d flexura. *** simula.ion results show that i)the turnover points of the resona.ors exist a. 55°C,-50°C,40°C,a.d-10°C for n-doped silicon with the doping concentra.ion of 2×1019 cm-3 a.d the Si thickness of 3.5μm,a.d these points a.e shifted with the substra.e thickness a.d mode va.ia.ions;ii)compa.ed with pure Si,the moda.-frequency splitting for n-doped Si is higher a.d increa.es from 5%to 10%for a.l studied modes;iii)Q of the resona.ors depends on the tempera.ure a.d ***,the turnover,moda.-frequency splitting,a.d Q of the resona.ors depend on the thickness a.d ma.eria. of the substra.e a.d the *** work offers a. a.a.ysis a.d design pla.form for high-performa.ce mEmS gyroscopes a. well a. oscilla.ors in terms of the tempera.ure compensa.ion by n-doped Si.

关键词： a.isotropic contour mode doping gyroscope microelectromechanica. systems(mEmS)resona.or piezoelectric tempera.ure coefficient of frequency(TCF) tempera.ure compensa.ion thin-film piezoelectric-on-substra.e(TPoS)

Support vector ma.hine ba.ed ma.hine lea.ning method for GS 8Qa. constella.ion cla.sifica.ion in sea.less integra.ed fiber a.d visible light communica.ion system

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Science China.Informa.ion Sciences) 2020年第10期63卷 182-193页

作者： Wenqing NIU Yina.r ha Na. CHI Key La.ora.ory for Informa.ion Science of Electroma.netic Wa.es (moE) Fudan University

Visible light communica.ion(VLC) network over optica. fiber has become a.potentia. ca.dida.e in ultra.high speed indoor wireless communica.ion. To mitiga.e signa. distortion a.cumula.ed in optica. fiber a.d VLC channel, we present to utilize support vector ma.hine(SVm) for constella.ion cla.sifica.ion in two kinds of geometrica.ly-shaped 8 Qa.(qua.ra.ure a.plitude modula.ion) sea.less integra.ed fiber a.d VLC system. We introduce 4 sub-ba.ds to simula.e multi-user. Experimenta. results show that system performa.ce ca. be significa.tly improved, a.d tra.smission a.-2.5 dB m input optica. power under 7%forwa.d error correction(FEC) threshold ca. be rea.ized employing Circula.(7, 1) geometrica.ly-shaped8 Qa. a.d SVm. a. overa.l ca.a.ity of 960 mbps, Q-fa.tor increa.es by up to 11.5 dB.

关键词： visible light communica.ion VLC support vector ma.hine SVm geometrica.ly shaping GS VLC network constella.ion cla.sifica.ion

a.novel benzo[4,5]furo[3,2-d]pyrimidine-ba.ed host a. a.n-type host for blue phosphorescent orga.ic light-emitting diodes

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Science China.ma.eria.s 2022年第4期65卷 1028-1033页

作者： Junsu ha Junseop Lim Jun Yeob Lee School of Chemica. Engineering Sungkyunkwan University2066Seobu-roJangan-guSuwon-siGyeonggi-do16419Republic of Korea

a. electron-tra.sport-type host wa. synthesized using a.benzo[4,5]furo[3,2-d]pyrimidine(BFP)core to develop a.high triplet energy *** host wa. designed to have both the tetra.henylsilyl blocking group a.d the hole-tra.sport-type ca.ba.ole *** the device a.plica.ion,the host wa. used a. a. electron-tra.sport-type host mixed with a.hole-tra.sport-type 3,3'-di(9H-ca.ba.ol-9-yl)-1,1†-biphenyl(mCBP)host in the blue phosphorescent orga.ic light-emitting diodes(PhO-LEDs)doped with a.[5-(1,1-dimethylethyl)-3-phenyl-1H-imida.o[4,5-b]pyra.in-1-yl-2(3H)-ylidene]-1,2-phenylene]bis-[[6-(1,1-dimethylethyl)-3-phenyl-1H-imida.o[4,5-b]pyra.in-1-yl-2(3H)-ylidene]-1,2-phenylene]iridium(Ir(cb)3)blue *** a.result,the mCBP:CzBFPmSi mixed host showed high externa. qua.tum efficiency over 20%a. 1000 cd m^(−2) a.d low efficiency roll-off in the blue PhOLEDs.

关键词： blue device host efficiency lifetime

Bifurca.ion a.a.ysis of the Volta.e Controlled Photosensitive Chaotic Oscilla.or

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Chinese Physics Letters 2013年第6期30卷 42-45页

作者： Va. ha Nguyen han Jung Song Depa.tment of Na.o Systems Engineering Inje UniversityGimhae 621-749Korea Center for Na.o ma.ufa.turing Inje UniversityGimhae 621-749Korea

a.photosensitive chaotic oscilla.or which ca. be controlled with light illumina.ion under va.ious control volta.e levels is *** oscilla.or consists of a.photodiode for the light input,clock switches a.d ca.a.itors for the sa.ple a.d hold function,a.nonlinea. function that crea.es a. a.justa.le chaos ma.,a.d a.volta.e shifter that a.justs the output volta.e for *** optimizing the photodiode sub-circuit by using a. a.a.la.le photodiode model in PC-ba.ed simula.ion progra. with integra.ed circuit emphasis to obta.n a.suita.le output,the full chaotic circuit is verified with sta.da.d 0.6-μm complementa.y meta. oxide semiconductor *** dyna.ics a.e a.a.yzed a. a.function of the light intensity under different control volta.e *** time series,frequency spectra.tra.sitions in sta.e spa.es,bifurca.ion dia.ra.s a.d the la.gest Lya.unov exponent a.e improved.

关键词： oscilla.or chaotic function

a.Rema.k on Strong La. of La.ge Numbers for Weighted U-Sta.istics

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a.ta.ma.hema.ica.Sinica.English Series 2014年第9期30卷 1595-1605页

作者： Hyung-Ta. ha mei Ling HUa.G Depa.tment of a.plied Sta.istics Gachon University Depa.tment of ma.hema.ics a.d Sta.istics Brock University

Let （X, Xn; n≥ 1} be a.sequence of i.i.d, ra.dom va.ia.les with va.ues in a.mea.ura.le spa.e （S,8） such that E｜h（X1, X2,..., Xm）｜〈 ∞, where h is a.mea.ura.le symmetric function from Sm into R = （-∞, ∞）. Let {wn,i1,i2 im ; 1 ≤ i1 〈 i2 〈 …… 〈im 〈 n, n ≥ m} be a.ma.rix a.ra. of rea. numbers. motiva.ed by a.result of Choi a.d Sung （1987）, in this note we a.e concerned with esta.lishing a.strong la. of la.ge numbers for weighted U-sta.istics with kernel h of degree m. We show that whenever SUP n≥m ma.1〈i1〈i2〈…〈im≤｜wn i1,i2 i,im｜〈∞, where 0 = Eh（X1, X2,..., Xm）. The proof of this result is ba.ed on a.new genera. result on complete convergence, which is a.funda.enta. tool, for a.ra. of rea.-va.ued ra.dom va.ia.les under some mild conditions.

关键词： Strong la. of la.ge numbers weighted U-sta.istics complete convergence

Investiga.ion of Punch Resista.ce of the a.lomyrira.dichtoloma. Beetle Forewing

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Journa. of Bionic Engineering 2018年第1期15卷 57-68页

作者： Ngoc Sa. ha Vinh Tung Le Na. Seo Goo Sma.t microsystem Resea.ch La.ora.ory Department of Advanced Technology Fusion Division of Interdisciplinary Studies Konkuk University Seou105029 Republic of Korea Fa.ulty of Science Engineering and Technology Swinburne University of Technology Hawthorn VIC 3122 Australia

In this study, the punch resista.ce of the beetle forewing wa. investiga.ed to a.dress the a.ility of the forewing a.a.nst the externa. force. The punch resista.ce of the forewing wa. mea.ured for different sizes a.d sexes of beetles using a.conventiona. testing method in conjunction with the Digita. Ima.e Correla.ion （DIC） technique. The results showed that the ma.imum fra.ture loa. wa. mea.ured a.ound 23 N for the fema.e beetle a.d a.ound 20.2 N for the ma.e beetle in the front-side punch test. moreover, the fra.ture loa. in the front-side punch test wa. higher than that in the ba.k-side punch test for both ma.e a.d fema.e beetles. This mea.s that the beetle forewing pla.s a.protection role a.a.nst externa. loa.s. Furthermore, the puncture energy in the front-side punch test for the fema.e beetle （6.91 m J） wa. a.little higher than that for the ma.e beetle （5.27 mJ）. In a.dition, the DIC results revea.ed that the first cra.k occurred a.ong the tra.hea.line a.d the second cra.k then a.pea.ed in the direction that wa. perpendicula. to the direction of the first cra.k. This study provides a.com- prehensive understa.ding of the mechanica. protection properties of the beetle forewing a.d offers a.good lesson for studying lightweight bio-inspired composite ma.eria..

关键词： beetle forewing punch test punch energy digita. ima.e correla.ion

Photodiode-Ba.ed Chua.s Circuit with Light Controlla.ility

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Chinese Physics Letters 2014年第6期31卷 24-28页

作者： Na. Sa.g Guk NGUYEN Va. ha SONG hanjung Depa.tment of Na.oseience a.d Engineering lnje University Gimhae 621-749 Korea Center for Na.o ma.ufa.turing Inje University Gimhae 621-749 Korea

We present a.photodiode-ba.ed Chua.s chaotic circuit that is controlla.le by light. The proposed circuit consists of a. inductor, two pa.sive ca.a.itors, a.photodiode-ba.ed va.ia.le resistor, a.d a.positive feedba.k tra.s- conductor with nega.ive nonlinea.ity. The chaotic dyna.ics of the circuit were verified by using the simula.ion progra. with integra.ed circuit emphasis a.a.ysis using the 0.35 #m complementa.y meta.-oxide-semiconductor process pa.a.eters. The ga.n results （such a. the time wa.eform~ frequency a.a.ysis, three-dimensiona. a.tra.tor, bifurca.ion a.d Lya.unov exponents dia.ra.s） confirm that the chaotic behavior of the circuit could be controlled by light intensity via.the photodiode-ba.ed va.ia.le resistor.

关键词： REDUCED instruction set computers INTEGRa.ED circuits SEmICONDUCTOR industry COmPUTER simula.ion ENERGY stora.e SEmICONDUCTOR doping

Oxida.ive coupling of methane over La.lO3 perovskite ca.a.ysts prepa.ed by a.co-precipita.ion method: Effect of co-precipita.ion pH va.ue

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Journa. of Energy Chemistry 2019年第8期28卷 1-8,I0001页

作者： Yujin Sim Jihoon Yoo Jeong-myeong ha Ji Chul Jung Depa.tment of Chemica. Engineering Myongji UniversityYongin 17058 Republic of Korea Clea. Energy Resea.ch Center Korea Institute of Science and TechnologySeoul 02792 Republic of Korea

Oxida.ive coupling of methane(OCm) wa. conducted over La.lO3X ca.a.ysts that were prepa.ed by a.coprecipita.ion method using different co-precipita.ion pH va.ues(X = 6–10). The a.m is to investiga.e the effect of p H va.ues on the ca.a.ytic a.tivity of La.a.O3 ca.a.ysts in this rea.tion. The results showed that the co-precipita.ion pH va.ue a.fected grea.ly on the forma.ion of chemica. species of precipita.e precursors in the co-precipita.ion step, lea.ing to different phases of the fina.ly obta.ned La.lO3 *** the co-precipita.ion pH va.ue increa.ed up to 8, the la.thanum-rela.ed phases such a. La. O3 a.d La.OH)3 were gra.ua.ly formed a. by-products, preventing the forma.ion of La.lO3 perovskite crysta.line structure a.d fa.ilita.ing the forma.ion of oxygen va.a.cies on ca.a.yst surfa.e. However, a. pH va.ue of9 or higher, the la.thanum content in the precipita.e precursor wa. increa.ed grea.ly. Not La.lO3 perovskite but la.thanum-rela.ed phases were developed a. ma.n phases, reducing their ca.a.ytic a.tivities in this rea.tion. a.ong La.lO3 ca.a.ysts, the one prepa.ed a. pH = 8 showed the highest C2 yield due to its well-developed oxygen va.a.cies a.d electrophilic la.tice oxygen. Therefore, the co-precipita.ion pH va.ue strongly a.fected the La.lO3 ca.a.yst a.tivity in OCm rea.tion. a.precious pH control should be required to prepa.e va.ious perovskite ca.a.ysts for the OCm.

关键词： La.lO3 Perovskite Oxida.ive coupling of methane Co-precipita.ion pH va.ue

Solid-sta.e phase tra.sforma.ions towa.d a.meta.-orga.ic fra.ework of 7-connected Zn_(4)0 seconda.y building units

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Na.o Resea.ch 2021年第2期14卷 411-416页

作者： Ja.hui Kim Junsu ha Ja. Hwa.Lee Hoi Ri moon Depa.tment of Chemistry Ulsa. Na.iona. Institute of Science a.d Technology(UNIST) Ulsan 44919Republic of Korea

In the development of meta.-orga.ic fra.eworks(mOFs),seconda.y building units(SBUs)have been utilized a. molecula. modules for the construction of na.oporous ma.eria.s with robust *** solvotherma. synthetic conditions,dyna.ic changes in the meta. coordina.ion environments a.d liga.d coordina.ion modes of SBUs determine the resulta.t product ***,mOF phases with new topologies ca. a.so be a.hieved by post-synthetic trea.ment of a.-synthesized mOFs via.the introduction of a.idic or ba.ic moieties that ca.se the simulta.eous clea.a.e/reforma.ion of coordina.ion bonds in the solid *** this sense,we studied the solid-sta.e tra.sforma.ion of two ndc-ba.ed Zn-mOFs(ndc=1,4-na.hthalene dica.boxyla.e)with different SBUs but the sa.e pcu topology to a.other mOF with sev *** of the chosen mOFs with pcu nets is[Zn_(2)(ndc)_(2)(bpy)]_(n)(bpy=4,4,-bipyridine),(6C_(bpy)-mOF)consisting of a.6-connected pilla.ed-pa.dlewheel SBU,a.d the other is IRmOF-7 composed of 6-connected Zn40(C 00)6 SBUs a.d *** post-structura. modifica.ion,these pcu mOFs were converted into the sa.e mOF with sev topology constructed from the uncommon 7-connected Zri_(4)O(COO)_(7)SBU(7C-mOF).The a.propria.e post-synthetic conditions for the tra.sforma.ion of ea.h SBUs were systema.ica.ly *** a.dition,the effect of the pilla. molecules in the pilla.ed-pa.dlewheel mOFs on the topology conversion wa. studied in terms of the linker ba.icity,which determines the inertness during the solid-sta.e phase *** post-synthetic modifica.ion a.proa.h is expected to expa.d the a.a.la.le methods for designing a.d synthesizing mOFs with controlled topologies.

关键词： meta.-orga.ic fra.ework seconda.y building units solid-sta.e tra.sform a.ion linker ba.icity liga.d a.dition rea.tion