简介:Weexperimentallydemonstratea16×16reconfigurablynonblockingopticalswitchfabricusingaBenesarchitecture.Theswitchfabricconsistsof562×2Mach–Zehnderinterferometerbasedelementaryswitches,witheachintegratedwithapairofwaveguidemicroheaters.Theaverageon-chipinsertionlossis~5.2dBforbothofthe'all-cross'andthe'all-bar'states,withalossvariationof1dBoverallroutingpaths.Thecrosstalkforallswitchingstatesisbetterthan-30dB.Theswitchingtimeoftheswitchelementisabout22μs.Theswitchingfunctionalityisverifiedbytransmissionofa40Gb∕squadraturephase-shiftkeyingopticalsignal.
简介:ThepresolarSiCgrains[1]carrytheoriginalstellarnucleosynthesissignature.Theirisotopicanomaliescomparedtothesunarethestrongconstrainsinthesupernovae(SN)modelcalculations.The15N-excessinsomeSiC-ABgrains(12C/13C<10and14N/15N<272)isoneofthechallengesofcore-collapsesupernovae(CCSNe)models[2].Recently,PignataripointedoutthattheentrainmentofH-richmaterialintotheHeshellbeforetheSNexplosionallowsthecoproductionof13C,15Nand26Al,whichprovidesanewproductionscenarioforSiC-ABgrains[2].IntheHeshellnucleosynthesis,the13Cisproducedthrough12C(p,γ)13N(β+γ)13Creaction.The14Nissynthesizedthrough13N(n,γ)and13C(p,γ)reactions.
简介:AbinitiomolecularorbitalcalculationsofdoublynegativechargedB16H162-(D2)andneutralB16H16(Td)havebeendoneattheHF/6-31Glevel.TheyarepredictedtobechemicallyandkineticallystablebyvibrationalanalysesontheirrespectiveenergyhypersurfaceoftheHF/6-31Glevel.ThegeometricalstructureofthespeciesB16H1622-(D2)wasdiscussed.
简介:Withabout20permanentstaffandseveralgraduatestudents,IonSourceGroupisdoingpioneeringworkinhighperformanceECRandLaserionsourcedevelopment,ionsourceplasmastudy,ionsourceapplicationandroutineoperationfornationallaboratory.In2016,withthegreatcontributionsoftheteammembers,manyverypromisingresultsandachievementshavebeenmade.FortheroutineoperationofHIRFLfacility,threeionsources,i.e.
简介:A16-channeldualtuningwavelengthdivisionmultiplexer/demultiplexerbasedonsilicononinsulatorplatformisdemonstrated,whichisbothpeakwavelengthtunableandoutputopticalpowertunable.Thewavelengthdivisionmultiplexer/demultiplexerconsistsofanarrayedwaveguidegratingforwavelengthdivisionmultiplexing/demultiplexing,aheaterforpeakwavelengthtuningandavariableopticalattenuatorbasedonp–i–ncarrier-injectionstructureforopticalpowertuning.Theexperimentalresultsshowthattheinsertionlossonchipofthedeviceis3.7dB–5.7dBandthecrosstalkis7.5dB–9dB.Forthetunabilityofthepeakwavelength,1.058-nmwavelengthtunabilityisachievedwith271.2-mWpowerconsumption,andtheaveragemodulationefficiencyis3.9244nm/W;forthetunabilityoftheopticalpower,theopticalpowerequalizationisachievedinall16channels,20-dBattenuationisachievedwith144.07-mWpowerconsumption,andtheraise/falltimeofVOAis35ns/42ns.
简介:自然数集按(mod6)排列后,将自然数符号螺旋对称分布的规律与自然律有机关联起来研究,从中发现数集中部分合数M中所包含相同素因子P,q周期分布与等距传递的规律,即双重素数P,q实项、虚项原构、同构同因子对应组螺旋对称分布结构的形式与规律,可模拟宇宙万物的时空螺旋运动状态,模拟DNA双螺旋结构碱基(A、T、G、C)序列遗传密码结构与形式。亦可作为一种创新方法开发应用研究,为研究DNA序列结构的数学编码,研究宏观宇宙、中观生物、微观质量的对应螺旋运动状态,预测宇宙万物相互关联相互作用的变化规律与趋势,构建基于宇宙中空时序的自然数双重素数因子对应组(多组)螺旋延伸的数码模型,高度抽象探讨与理解宇宙万物运动变化的原本规律,为相关问题的表述与解决提供数码螺旋的解决方案。
简介:Spallationtargetrepresentsoneofthemostchallengingcomponentsinacceleratordrivensystems(ADS)sinceitisthecomponentcouplingtheacceleratorandthesub-criticalcore.Itissubjectedtobombardmentofintenseprotonbeamandveryhighthermalloadinastrongradiationfield.TheirradiatedLBEtargetposesseverehandlingproblemsforthemaintenancestaffandotherscientistsduetoitsresidualactivity[1].ToassistthedesignofADS,thegeneralradiologicalsafetyaspectsoflead,lead-bismutheutectic(LBE)andtungstenspallationtargetwerestudiedwithMCNPX2.7code[2].Thespallationtargetwasirradiatedbya250MeV,10mAprotonbeamproducedbyalinearprotonaccelerator.Theneutronyield,neutronspectrum,residualproductionandtimeevolutionfortheirradiatedtargetwereanalyzed.
简介:Study of Fusion with Binary Process in 16O+45Sc ReactionStudyofFusionwithBinaryProcessin16O+45ScReaction¥WangShufan...
简介:在计算机化的断层摄影术(CT)的膀胱的分割想象是在放射治疗计划前列腺癌症的重要的步。我们在场自动地描出的一个新分割计划在与三个学生一起的CT图象的膀胱轮廓走。首先,我们使用吝啬的移动算法获得包含膀胱的不平的轮廓的一幅聚类的图象,它然后被使用一个成长区域的算法,起始的种子点从扫描进程的一个线每篇文字题目下作者的署名选择了在第二步提取。第三步是用转动球算法更精确地精制膀胱轮廓。这些步然后被扩大以一种slice-by-slice方式分割膀胱体积。获得的结果与由放射肿瘤学家的用手的分割相比。敏感,特性,积极预计用价值,否定预计用价值,和Hausdorff距离的平均价值分别地是86.5%,96.3%,90.5%,96.5%,和2.8象素。结果证明膀胱能精确地被分割。