简介:这调查由白噪音途径瞄准各向异性的fractionalBrownian随机地的新构造。而且,我们调查它的分发和样品性质(增长的静止,自我类似,样品连续性)它将供应一些有用看法到未来应用。
简介:"Whitepowderytungsticacid"hasbeenusedforpreparingvarioustypesoftungsten-containingcompoundsduetoitshighreactivity.Thepresentpapercoversthestandardmolarenthalpiesofformation,△H0/fofthreetungsten-containingacids.Thevaluesfoundfor"whitepowderytungsticacid"WO3·1.68H2O,"yellowtungsticacid"WO3·1.20H2OanddodecatungstophosphoricacidH3(PW12O40)·25H2Oat298.15Kwere-(1312±1),-(1192±1)and-(18150±13)kJmol-1,respectively.
简介:在这个工作,静止阶段与phosphorylcholine(PC)修改了的两性离子的离子层析(ZIC)的一种准备方法被hydrolyzing在结合的phosphorylcholine二氯化物以后获得到diol硅石更好在酸的蛋白质和基本蛋白质的同时的分离作为ZIC静止阶段ligand探索PC组的特征。结果证明同时,二种酸的蛋白质和三种基本蛋白质能完全被分开母鸡鸡蛋白色被分开并且净化并且三种鸡蛋白人部件ovalbumin,G2ovoglobulin和ovotransfemin蛋白质被一个单身者完全分开PC-ZIC上的步列,所有蛋白质的纯净上面到达了95%。PC-ZIC静止阶段成功地比以前在这份报纸报导与更好的分离能力和选择被改进。
简介:美国次级债危机引起了全球金融市场的动荡,这使得国内外风险管理者们不得不更加关注由于信用风险带来的种种问题。在我国还没有一种公认的理论或方法能够实际解决信用风险的定价问题。本文力图寻找一种不完全依赖于信用评级的信用风险定价方法,利用市场即时信息而不是历史信息对信用风险溢价进行估算,从而寻找到一套在中国市场具有操作性的信用风险定价方法。本文应用三叉树模拟的方法来构建基于Hull-White模型的信用风险定价模型,并应用市场数据对两类次级债基础衍生品进行了定价。这一研究具有较好的可操作性,对中国信用风险定价研究领域提供了有利补充,为中国证券市场动态信用风险管理提供新的思路和可能的解决渠道。
简介:Monolithicwhite-light-emittingdiodes(whiteLEDs)withoutphosphorsaredemonstratedusingInGaN/GaNmultiplequantumwells(MQWs)grownonGaNmicroringsformedbyselectiveareaepitaxyonSiO2maskpatterns.Themicroringstructureiscomposedof{1-101}semi-polarfacetsanda(0001)c-plane,attributedtofavorablesurfacepolarityandsurfaceenergy.ThewhitelightisrealizedbycombiningshortandlongwavelengthsofelectroluminescenceemissionsfromInGaN/GaNMQWsonthe{1-101}semi-polarfacetsandthe(0001)c-plane,respectively.ThechangeintheemissionwavelengthsfromeachmicrofacetisduetotheIncompositionvariationsoftheMQWs.Theseresultssuggestthatwhiteemissioncanpossiblybeobtainedwithoutusingphosphorsbycombiningemissionlightfrommicrostructures.
简介:Angularcoloruniformity(ACU)isakeyfactorusedtoevaluatethelightqualityofwhite-lightemittingdiodes(LEDs).Inthisstudy,anoveldoubleremotemicro-patternedphosphorfilm(doubleRMPPfilm)wasusedtoenhancetheACUofaremotephosphor(RP)down-lightlamp.AconventionalRPfilmandremotephosphorfilmwithsinglemicro-patternedfilm(singleRMPPfilm)alsowereexaminedforcomparison.Theangularcorrelatedcolortemperature(CCT)distributionsandtheopticalperformanceofthefilmswereexperimentallymeasured.ThemeasurementresultsshowedthatdoubleRMPPfilmconfigurationexhibitedbettercoloruniformitywithaCCTdeviationofonly441K,comparedwith556KforthesingleRMPPfilmconfigurationand1390KfortheRPfilmconfiguration.AsimulationbasedonFDTDandraytracingcombinedmethodalsoconfirmedtheACUimprovement.Inaddition,comparedwiththeconventionalRPfilm,theluminousefficiencyofsingleanddoubleRMPPfilmconfigurationswasincreasedby6.68%and4.69%,respectively,atadrivingcurrentof350mA.TheenhancementoftheACUandluminousefficiencyareduetothescatteringandmixingeffectofthemicropatternedfilm.Moreover,thedoubleRMPPfilmconfigurationhadbetterCCTstabilityatdifferentcurrentsthantheothertwoconfigurations.TheresultsdemonstratedtheeffectivenessandsuperiorityofdoubleRMPPfilminwhiteLEDapplications.