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86 个结果
  • 简介:有铟听氧化物(ITO)的结构的蓝、绿的器官的轻射出的设备/N,N鈥?二度--(1-naphthyl)-N,N鈥?diphenyl-1,1鈥?biphenyl-4,4鈥?diamine(NPB)/aluminum(III)二度(2-methyl-8-quinolinato)4-phenylphenolato(BAlq)/tris(8-hydroxyquinolate)铝(Alq3)/Mg:Ag被制作了。到绿轻排放的蓝色与器官的电影厚度的变化被完成了。基于精力乐队图和费用搬运人通道理论,当调节颜色的层和颜色变量electroluminescence(EL)在费用搬运人再结合地区以内被归功于到调整功能,不同厚度的电影起一个作用,这被结束当调节颜色的层和颜色变量electroluminescence(EL)在费用搬运人再结合地区以内被归功于到调整功能。在有高效的heterostructure设备的情况中,观察EL系列与器官的电影的厚度显著地变化,它从再结合的移动被结果区域地点。设备相同部件创作,这迄今没被显示能被实现由改变功能的层的电影厚度认识到不同颜色排放。CLC数字TN383这个工作被中国(资助号码60425101)的国家科学基金支持了,为大学里的新世纪优秀才能的节目(资助没有。NCET-06-0812)并且UESTC(资助No.060206)的年轻优秀工程。

  • 标签: 发光器件 厚度 蓝光 绿光
  • 简介:与WiFi和3G/4G的快速的发展,人们趋于在移动设备上看录像。这些设备是无所不在的,但是有小存储器缓冲录像。作为结果,与传统的计算机相对照,这些设备加重内容供应商的网络压力。以前的研究使用CDN解决这个问题。但是它出租空间不能动态地在被调整的静态的租借机制让运作的费用高飞并且与不兼容动态地录像交货。在我们的学习,基于从Tencent录像的用户行为的彻底的分析,一个流行中国联机录像份额平台,我们识别二关键用户行为。第一,在一样的区域的大量用户趋于看一样的录像。第二,录像的流行分发符合Pareto原则,即,20%流行录像拥有的顶80%所有录像交通。把这些观察变成银子弹,我们在需求系统(CPA-VoD)上建议并且实现一个新奇帮助云、帮助同伴的录像。在系统,我们在象同伴群的一样的区域,并且在一样的同伴群组织用户,用户们能由分享他们的缓冲录像提供录像给另外的用户。而且,我们在云服务器缓冲10%很流行的录像进一步减轻网络压力。我们选择云服务者因为出租空间能动态地被调整,缓冲录像。根据从Tencent录像的真实数据集上的评估,CPA-VoD最优地减轻网络压力和操作费用,当仅仅20.9%交通被内容供应商满足时。

  • 标签: 视频点播系统 移动设备 对等 内容提供商 用户行为 内存缓存
  • 简介:ObjectivesToevaluateretrospectivelythepotentialbenefitsofcombinedutilizationofvariousassistedcirculationdevicesincardiacarrestpatientswhodidnotrespondtoconventionalcardiopulmonarycerebralresuscitation(CPCR).MethodsAssistedcirculationdevices,includingemergencycardiopulmonarybypass(ECPB),intra-aorticballoonpump(IABP),andleftventricularassistdevice(LVAD),wereappliedto16adultpatientswhohadcardiacarrest82min-56hafteropenheartsurgeryanddidnotrespondto20minorlongerconventionalCPCR.ECPBwasappliedto2patients,ECPBplusIABPto8patients,ECPBplusIABPandLVADto6patients.ResultsOnepatientrecoveredfullyandonepatientdied.Oftheother14patients,13resumedspontaneouscardiacrhythmandonedidnot;noneofthemcouldbeweanedfromECPB.Furthertreatmentofthe14patientswithcombinationsofassistedcirculationdevicesenabled6patientstorecover.Oneofthe7recoveredpatientsdiedofreoccurringcardiacarrestafter11days;theother6weredischargedingoodconditionandwerefollowedupfor3-49months(mean=22months).Ofthe6dischargedpatientsonesufferedcerebralembolismduringLVADtreatment,resultinginmildlimitationofmobilityoftherightlimbs;theother5nevermanifestedanycentralnervoussystemcomplications.Therewasnolatedeathsgivinga37.5%(6/16)long-termsurvivalrate.ConclusionsECPBcouldeffectivelyreestablishbloodcirculationandoxygensupply,rectifyacidosis,andimproveinternalmilieu.ThecombinedutilizationofECPB,IABP,andLVADreducesthedurationofECPB,improvestheincidenceofrecovery,andoffersbeneficialalternativestorefractorycardiacarrestpatients.

  • 标签: 心脏疾病 心肺疾病 心脑综合症 病理机制
  • 简介:AIMTo分析在眼睛的biomechanical和眼睛的生物测定的数据之间的关联,在健康subjects.METHODSThree上由基于Scheimpflug的设备测量了连续大小用角膜的可视化Scheimpflug技术(CorVis圣)被执行健康眼睛上的设备和10个设备特定的参数被记录。Pentacam导出HR的参数(前面、以后的表面上的角膜的弯曲半径;顶端的pachymetry;角膜的体积;角膜的错误数据;前面的房间的深度,体积和角度)并且从IOLMaster的轴的长度(AL)与10特定的CorVis圣parameters.RESULTSMeasurements被相关在43个志愿者的43只眼睛被进行(年龄61.24楴湯污?H

  • 标签: 前面的片断参数 BIOMECHANICS 角膜的可视化 Scheimpflug 技术 眼睛的反应分析器
  • 简介:ThepopularizationofmobiledeviceshascausedconsiderableimpactonthesecurityofthemilitaryoftheRepublicofChina.Themilitarybarrack-areashavelongbeenfacedthecontrolofmobiledevicesfourissues:thelackofaccurateuseofresources,thelackofprotectionofthemobiledevicefromtheoverallpointofview,theuncleardivisionofresponsibilityamongspecializedagencies,andunclearmembers’responsibilitiesfortheirownduties.Thisstudyappliesthestructurebehaviorcoalescence(SBC)methodologytointegratetheorganizationalstructureoftheparticipatingmanagementandcontrolunitswitheffectivemanagementbehaviorsinavisualizedandusefulmanner.Theunitscaneffectivelycommunicatewitheachotherandsolvethefourissuesfacedbythemilitarybarrack-areasforthecontrolofmobiledevices.Thisresearchfulfillsimprovingthelackofcontrolofthemilitarymobiledevicesbyusingofmanagementresourceseffectivelyandtheestablishmentofmobiledevicesmanagementwiththeoverallconcept,andstrengtheningtherightsandresponsibilitiesandinformationsecurityawareness,throughthelogicalverificationandenterpriseinterviewresults.

  • 标签: information security management structure behavior COALESCENCE
  • 简介:一般来说,量钥匙分发(QKD)由于量无常原则,量noncloning定理和意味着量不能进一步被划分的量nondividing原则为完美的设备被证明无条件地安全。然而,在系统使用的实际光、电的设备是有瑕疵的,它能被偷听者部分利用到或完全侦察在合法聚会之间的秘密钥匙。在这篇文章,我们简短首先在量关于国际性地执行的有瑕疵的设备砍在一些试验性的QKD系统上上考察最近的工作,然后,我们将在细节介绍我们的最近的砍工作包括被动法拉第镜子攻击,部分随机的阶段攻击,选择波长的photon-number-splitting攻击,频率移动攻击,和single-photon-detector攻击。那些量攻击提醒人改进安全由简单地增加反措施或采用象测量设备独立人士协议那样的一个完全不同的协议避免量砍在测量设备的瑕疵上由于有瑕疵的设备在实际QKD系统存在[Lo,等,Phys。加快。Lett,2012,108:130503]。

  • 标签: 量子密钥分配 电气设备 安全性分析 分配系统 实验 光学
  • 简介:Wereviewthestateoftheartandourperspectivesonsiliconandhybridsiliconphotonicdevicesforopticalinterconnectsindatacenters.Afterabriefdiscussionofthekeyrequirementsforintra-datacenteropticalinterconnects,weproposeawavelength-division-multiplexing(WDM)-basedopticalinterconnectforintra-datacenterapplications.Followingourproposedinterconnectsconfiguration,thebulkofthereviewemphasizesrecentdevelopmentsconcerningon-chiphybridsiliconmicrolasersandWDMtransmitters,andsiliconphotonicswitchfabricsforintra-datacenters.ForhybridsiliconmicrolasersandWDMtransmitters,weoutlinetheremainingchallengesandkeyissuestowardrealizinglowpowerconsumption,directmodulation,andintegrationofmultiwavelengthmicrolaserarrays.Forsiliconphotonicswitchfabrics,wereviewvarioustopologiesandconfigurationsofhigh-port-countN-by-NswitchfabricsusingMach–Zehnderinterferometersandmicroringresonatorsasswitchelements,anddiscusstheirprospectstowardpracticalimplementationswithactivereconfiguration.Forthemicroring-basedswitchfabrics,wereviewrecentdevelopmentsofactivestabilizationschemesatthesubsystemlevel.Last,weoutlineseverallargechallengesandproblemsforsiliconandhybridsiliconphotonicstomeetforintra-datacenterapplicationsandproposepotentialsolutions.

  • 标签:
  • 简介:Inthispaper,photoexcitationprocessesinthebilayerdevicesbasedoninorganicmaterialsandpoly(N-vinyl-carbazole)(PVK)wereinvestigated.Inordertoclarifytherolesofinorganicmaterialsinphotoconductivepropertiesofbilayerdevices,TiO2andZnSwerechosentocombinewithPVK.Amodelforgenerationofphotocurrent(Iph)insinglelayerdeviceofPVKwasobtained.Itisdeducedthattherecombinationrateconstant(Pcomb)andtheionizationrateconstant(γ)ofexcitonsshouldbeconsideredasthemostimportantfactorsforIph.Forinorganicmaterials(TiO2orZnS)/PVKbilayerdevices,inreversebiasof-4V,thephotocurrentof115mA/cm2intheTiO2/PVKdevicewasobserved,butthephotocurrentintheZnS/PVKdevicewasonly10mA/cm2undertheilluminationlightof340nmandthelightintensityof14.2mW/cm2.TheweakerphotocurrentisattributedtotheabsorptionofZnSwithinUVregionandtheenergyoffsetattheinterfacebetweenPVKandZnS,whichimpedesthetransportofchargecarriers.

  • 标签: 聚合体 无机半导体 光电导 薄膜 聚(N-乙烯基-咔唑)
  • 简介:加州米尔皮塔斯2008年6月30日电/新华美通/-CaliforniaMicroDevices(Nasdaq:CAMD)(简称“CMD”)今天宣布推出其用于手机的第三代PraetorianⅢLC滤波器架构。PraetorianⅢ产品为滤波器性能树立了新的基准,以较PraetorianⅠ产品更低的成本(相当于最近推出的PraetorianⅡ系列产品的成本)提供了更高的性能。基于创新的耦合电感设计,CMD的PraetorianⅢ架构提供感应水平较高以及电容水平较低的滤波器。这使得滤波器设计可提供较同类竞争产品更高的衰减水平以及更高的信号完整性。

  • 标签: LC滤波器 Micro Devices 架构 手机 滤波器设计
  • 简介:分别地,搬运器官的轻射出的设备(OLED)的层(HTL)的洞被真空免职和旋转涂层方法处理在哪儿N,N鈥?biphenyl-N,N鈥?二度(3-methylphenyl)-1,1鈥?biphenyl-4,4鈥?diamine(TPD)并且(vinylcarbazole)(PVK)poly充当了洞运输材料。Tris-(8-hydroxyquinoline)铝(Alq3)作为搬运层的轻射出的层和电子被利用。设备房间的基本结构是:indium-tin-oxide(ITO)/PVK:TPD/Alq3/Mg:Ag。设备的electroluminescent(EL)特征被描绘。结果证明EL系列的山峰在530nm被定位,它遵循了Alq3的描绘的光谱。与使用真空免职方法相比,有直到26135cd/m2的最大的发光性的绿排放能被用纺纱涂层技术选择合适的溶剂在15V的开车电压完成,并且它的最大的发光性效率是在5.5V的开车电压的2.56lm/W。CLC数字TN383+.1这个工程被部水平资助和UESTC的年轻优越工程赞助(资助号码:UESTC-2006206)

  • 标签: 空穴转运层 有机发光装置 真空沉积 自旋
  • 简介:Lyingbetweenradiofrequencyandinfraredradiation,terahertz(THz)waveencounterslotsofdifficultiestoproduce,detect,transmit,andmodulate.GreateffortshavebeenmadetoconstructTHzdevices,includingsources,detectors,switches,modulators,lenses,andfilters.However,onlymoderateprogresseshavebeenmadeinTHzgenerationanddetection.Furthermore,thedevicesandtechniquestocontrolandmanipulateTHzwavesarestillinitsinfancy.Therefore,itisstillachallengetodateto

  • 标签: 太赫兹波 材料体系 器件 TTA 编辑 客户
  • 简介:A100-Gb/shigh-speedopticaltransmitterisproposedandexperimentallydemonstrated.Basedonfrequency-quadruplingtechnique,twosub-channelswithafixed50-GHzspacingareobtainedfromonelasersource.Usingreturn-to-zerodifferentialquadraturephase-shiftkeying(RZ-DQPSK)modulationformatandpolarizationmultiplexing(PolMux),onlylow-speedelectronicdevicesof12.5GHzareneededforthe100-Gb/stransmitter.Thiseliminatestheneedofultrahigh-speedoptoelectronicdevicesandthusgreatlyreducesthecost.Theexperimentalresultsshowthatthistransmittercanachievegoodperfor-manceindispersiontoleranceofa25-kmsinglemodefiber(SMF).

  • 标签: 光学通信 光电子装置 光谱效率 单模光纤
  • 简介:Wedemonstratelow-losshydrogenatedamorphoussilicon(a-Si:H)waveguidesbyhot-wirechemicalvapordeposition(HWCVD).Theeffectofhydrogenationina-SiatdifferentdepositiontemperatureshasbeeninvestigatedandanalyzedbyRamanspectroscopy.Weobtainedanopticalqualitya-Si:Hwaveguidedepositedat230°CthathasastrongRamanpeakshiftat480cm-1,peakwidth(fullwidthathalf-maximum)of68.9cm-1,andbondangledeviationof8.98°.Opticaltransmissionmeasurementshowsalowpropagationlossof0.8dB/cmatthe1550nmwavelength,whichisthefirst,toourknowledge,reportforaHWCVDa-Si:Hwaveguide.

  • 标签: HOT-WIRE LOW-LOSS AMORPHOUS
  • 简介:以便获得两高电镀物品迁居(他们)在高周波的表面的可靠性和罚款维的控制声学的波浪(锯)设备,4-layeredTi/Al-Mo/Ti/Al-Mo电极电影在128°Y-XLiNbO3上被调查由劈啪作响的底层免职。结果显示4-layered电影与常规Al-0.5wt.%Cu电影相比有改进他们可靠性。他们的一生比在5×的当前的密度测试的Al-0.5wt.%Cu电影的长约三倍107A/厘米2和200°C的温度。而且,4-layered电影容易在反应离子蚀刻被蚀刻,罚款维的控制为高周波的锯设备在模式复制期间被认识到。为4-layered电影,最佳瞬间数量和劈啪作响的参数为高他们可靠性是很重要的。

  • 标签: 可靠性改进 表面声波 钼电极 纯铝 电迁移 SAW器件
  • 简介:Wehavefabricatedatop-emittingorganiclight-emittingdeviceonsiliconsubstratewithhighyellowluminancebasedon5,6,11,12-tetraphenylnaphthacenesub-monolayer.Itconsistsofathinlayerofhighlyconductivesilverasthesemitransparentcathodeandsurfaced-modifiedAgastheanode.Thedeviceturnsonat3Vwiththeluminanceof8.4cd/m^2.Themaximumcurrentefficiencyis1.3cd/Aat6Vandtheluminancereaches14790cd/m^2at14V.Theperformanceofthedeviceisexcellentintop-emittingorganiclight-emittingdevicesaccordingtoourknowledge.

  • 标签: 多层组织光发射二极管 硅基 亮度 启动电压 阴极
  • 简介:AbstractBackground:Cell salvage has recently been recommended for obstetric use in cases with a high risk of massive hemorrhage during cesarean section (CS). However, limited data are available to support the use of one suction device to collect lost blood. This study aimed to investigate the volume of red blood cells (RBCs) salvaged and the components of amniotic fluid (AF) in blood salvaged by one suction device or two devices during CS in patients with placenta previa and/or accrete.Methods:Thirty patients with placenta previa and/or accrete undergoing elective CS in the Women’s Hospital of Zhejiang University School of Medicine were recruited for the present study from November 1, 2017 to December 1, 2018. The patients were randomly assigned to one of the two groups according to an Excel-generated random number sheet: Group 1 (n = 15), in which only one suction device was used to aspirate all blood and AF, and Group 2 (n = 15), in which a second suction device was mainly used to aspirate AF before the delivery of the placenta. Three samples of blood per patient (pre-wash, post-wash, and post-filtration) were collected to measure AF components. The salvaged RBC volumes were recorded. Continuous data of pre-wash, post-wash, and postfiltration samples were analyzed by using one-way analysis of variance with Tukey’s test for multiple comparisons, or Kruskal-Wallis test with Dunn test for multiple comparisons. Comparisons of continuous data between Group 1 and Group 2 were conducted using Student’s t test or Mann-Whitney U test.Results:The salvaged RBC volume was significantly higher in Group 1 than that in Group 2 (401.6 ± 77.2 mL vs. 330.1 ± 53.3 mL, t = 4.175, P < 0.001). In both groups, squamous cells, lamellar bodies, and fat were significantly reduced by washing (all P<0.001) and squamous cells were further reduced by filtering (P < 0.001). Squamous cells were found in six post-filtration samples (three from each group). Lamellar bodies and fat were completely removed by filtering. Insulin-like growth factor binding protein 1, alphafetoprotein, albumin, lactate dehydrogenase, and potassium were significantly reduced post-wash (all P < 0.05), with no further significant reduction after filtration in either group (all P > 0.05). The mean percentage of fetal RBCs post-filtration was (1.8 ± 0.8)% with a range of 1.0% to 3.5% and (1.9 ± 0.9)% with a range of 0.7% to 4.0% in Groups 1 and 2, respectively, showing no significant difference between the two groups (U= 188.5, P = 0.651).Conclusion:Cell salvage performed by one suction device could result in higher volume of salvaged RBCs and can be used safely for CS in patients with placenta previa and/or accrete when massive hemorrhage occurs.

  • 标签: Cell salvage Blood transfusion Placenta previa Placenta accrete Cesarean section