简介:TheRatnagotravibbāga(abbr.RGV)isoneofthemostinfluentialtextsamongIndicworksthatteachtheBuddha-naturedoctrineinTibet.NotranslationofthetextseemstohaveexistedinTibetbeforetheⅡthcentury,inasmuchasnocatalogueoftheimperialperiod(the9thcentury),suchasthelDandkarmaandvPhangthangma,showsanyrecord.AlthoughonlyasingleTibetantranslationisextant(thatofrNgogBloldanshesrab[1069-Ⅱ09]andSajjana),vGosLotsābagZhonnudpal(1392-1481)reportsthatuptohistimesixtranslationshadalreadybeenmade:1
简介:ElectronleakagestillneedstobesolvedforInGaN-basedblue-violetlaserdiodes(LDs),despitethepresenceoftheelectronblockinglayer(EBL).Toreducefurtherelectronleakage,anewstructureofInGaN-basedLDswithanInGaNinterlayerbetweentheEBLandp-typewaveguidelayerisdesigned.TheopticalandelectricalcharacteristicsoftheseLDsaresimulated,anditisfoundthattheadjustedenergybandprofileinthenewstructurecanimprovecarrierinjectionandenhancetheeffectiveenergybarrieragainstelectronleakagewhentheIncompositionoftheInGaNinterlayerisproperlychosen.Asaresult,thedeviceperformancesoftheLDsareimproved.
简介:Theinfluenceofp-typeGaN(pGaN)thicknessonthelightoutputpower(LOP)andinternalquantumefficiency(IQE)oflightemittingdiode(LED)wasstudiedbyexperimentsandsimulations.TheLOPofGaN-basedLEDincreasesasthethicknessofpGaNlayerdecreasesfrom300nmto100nm,andthendecreasesasthethicknessdecreasesto50nm.TheLOPofLEDwith100-nm-thickpGaNincreasesby30.9%comparedwiththatoftheconventionalLEDwith300-nm-thickpGaN.ThevariationtrendofIQEissimilartothatofLOPasthedecreaseofGaNthickness.ThesimulationresultsdemonstratethatthehigherlightefficiencyofLEDwith100-nm-thickpGaNisascribedtotheimprovementsofthecarrierconcentrationsandrecombinationrates.
简介:以便获得对Mg-Ga二进制系统的热力学的描述,对系统的热力学的评价通过Thermo计算用CALPHAD方法被执行?软件包裹基于从出版文学的所有可得到的试验性的数据的评估。答案阶段包括液体,hcp(Mg)并且斜方晶(Ga),被代理答案模型,过量吉布斯精力与Redlich-Kister多项式被表示描述。同时,所有金属间化合的混合物,Mg5Ga2,Mg2Ga,MgGa,MgGa2和Mg2Ga5,作为stoichiometric混合物被建模。在Mg-Ga二进制系统提出各种各样的阶段的吉布斯精力的一套前後一致的热力学的参数最后被获得。好一些的协议在计算结果和报导试验性的数据之间被完成。
简介:有5-8nm的尺寸的做Eu的GaOOHnanoparticles被热水的方法作为表面活化剂用钠dodecylbenzenesulfonate(SDBS)准备。做Eu的-Ga2O3和-Ga2O3被退火进一步制作GaOOH:Eu然后由X光检查衍射(XRD)描绘了,传播电子显微镜学(TEM)和光致发光(PL)。TEM结果显示出那monodisperse做Eu3+的GaOOHnanoparticles形式然后变换进通过退火的做Eu3+的-Ga2O3和-Ga2O3GaOOH:在600和900点的Eunanoparticles?????????????????@
简介:GA3与GA4+7采用2种不同浓度,在花前10d、1d和盛花期对巨峰(Kyoho)葡萄进行无核处理,花后10d用GA,和CPPU以三种浓度组配进行膨大处理。各处理都使巨峰葡萄的无核率大幅度提高。GA3处理比GA4+7处理更有利于巨峰葡萄产生无核果。在GA3的处理中花前1d处理对其产生的无核效应明显大于花前10d和盛花期的处理,以花前1dGA,12.5mgL^-1+盛花后10dGA312.5mgL^-1效果最好,其无核率可达90.91%。GA4+7对提高巨峰葡萄的座果效果比较显著,以花前1dGA,25mgL^-1+盛花期GA325mgL^-1+CPPU20mgL^-1效果比较好,座果为对照的123.1%。在巨峰葡萄上,用GA3进行处理的果实有变长的趋势;而用GA4+7进行处理的则有果实变圆的趋势。膨大处理时,配施CPPU比单用GA3效果要好。
简介:Themicro-characteristicsofthestreakymarksandthecorrespondingsubstratesurfaceofgalvannealed(GA)steelsheetshavebeeninvestigatedusingSEMandFIB.Thestreakymarkareaseemstohavemanycavities,similartocraters,whichscatterlightandmakethesurfaceappeardarkerwhencomparedwiththesurroundingnormalarea.Moreover,itisfoundthattheirregularityordifferenceinsteelgrainsizetendstoaffectthesurfacequalityoftheGAsteelsheets.Duringalloying,thediffusionspeedofZn-Feonthegrainboundaryisfasterthanthatatthecenterofthegrain,whichresultsintheselectiveformationofcrater-likemorphologyinthecoatingareawithlargersteelgrains.DuetothecleargrainboundaryofIFsteel,apparentstreakymarkswillbeformedonthecoatin,iftheIFsteelsurfaceconsistsofrainsofirreularsize.
简介:Anewapproachtoreducingtheseismicresponseofspatialstructureswithmagneto-rheological(MR)dampersispresentedinthispaper.TheGeneticAlgorithmwithsmallpopulations(μGA)isusedtooptimizethecontrolfortheMRdamperstoreducestructuralvibration,whichisdifficulttoachieveusingclassicaloptimalcontrol.TheadvantagesofμGAaretheuseofglobalpropertiesandthatfewerconditionsarerequiredtoobtaintheoptimalfunction.Numericalresultsdemonstratetheeffectivenessoftheproposedmethodinreducingtheseismicresponseofstructures.
简介:NanosizedGa-containingZSM-5zeoliteswerepreparedviaisomorphoussubstitutionandimpregnationfollowedbycharacterizedusingvarioustechniques.Thecatalyticperformanceofthezeolitesforthearomatizationof1-hexenewasinvestigated.TheresultsindicatethatisomorphoussubstitutionpromotestheincorporationofGaheteroatomsintotheframeworkalongwiththeformationofextra-frameworkGaO+species([GaO+]a)thathavestrongerinteractionswiththenegativepotentialoftheframework.Inaddition,basedonthePy-IRresultsandcatalyticperformance,the[GaO+]aspecieswithstrongerLewisacidsitesproducedabettersynergismwithmoderateBr?nstedacidsitesandthusimprovedtheselectivitytoaromaticcompounds.However,theimpregnationresultsintheformationofGa2O3phaseandsmallamountsofGaO+speciesthataremainlylocatedontheexternalsurface([GaO+]b),whichcontributetoweakerLewisacidsitesduetoweakerinteractionswiththezeoliteframework.During1-hexenearomatization,thenanosizedGaisomorphouslysubstitutedZSM-5zeolitesamples(Gax-NZ5)exhibitedbettercatalyticperformancecomparedtotheimpregnatedsamples,andthehighestaromaticyield(i.e.,65.4wt%)wasachievedovertheGa4.2-NZ5sample,whichcontainedwiththehighestGacontent.
简介:摘要目的探讨25Ga+/27Ga+微创玻璃体切除术患者的手术配合方法及效果。方法分析总结104例玻璃体切除术器械护士手术配合技巧,总结配合经验。结果104例患者手术均顺利完成,切口闭合良好。结论器械护士熟悉手术器械使用方法、仪器管道连接方式、特殊器械清洗保养方法、手术过程及手术医生习惯等可节约手术时间,保证25Ga+/27Ga+微创玻璃体切除术顺利完成。
简介:Weinvestigateeffectsofannealingonmagneticpropertiesofathick(Ga,Mn)Aslayer,andfindadramaticincreaseoftheCurietemperaturefrom65to115Kbypostgrowthannealingfora500-nm(Ga,Mn)Aslayer.AugerelectronspectroscopymeasurementssuggestthattheincreaseoftheCurietemperatureismainlyduetodiffusionofMninterstitialtothefreesurface.Thedouble-crystalx-raydiffractionpatternsshowthatthelatticeconstantof(Ga,Mn)Asdecreaseswithincreasingannealingtemperature.Asaresult,theannealinginducedreductionofthelatticeconstantismainlyattributedtoremovalofMninterstitial.
简介:这座低层住宅是在一次建筑改造活动中设计的,于近期完工。业主希望能够最大化土地的利用率,并且希望住宅是生态的:其次是内向性的空间,以便保护隐私;最后业主希望能够引入周围山体的景色,以便在卧室能获得非常好的视角。住宅本身要具有韩国文化的印记,建筑师解决了内向性空间以及生态环境的设计,将室外空间的使用率提高,营造一个健康、自然的生存环境。同时吸取了山体周围环境的多样性和独特性,将卧室通过轴线引入到山体景观中,架空层是住宅多样性序列空间的开始,就像是一个地窖。建筑师将传统建筑语言转换为现代建筑语言,通过椭圆形的图案来装饰墙面,这源自于传统的石墙。住宅室内外通过一个回旋式的路径来创造一个多样的空间,建筑师希望业主的生活能够通过这个回旋式的空间而变得更有趣。
简介:为了获得指纹检测概率和视觉质量的平衡性能,提出基于SVD-GA的量化指纹优化算法。首先对载体图像的离散余弦变换域进行奇异值分解,然后根据视觉模型调节量化嵌入的强度,在原始图像的最大奇异值分量嵌入指纹信息,最后利用遗传算法优化指纹的量化嵌入参数,以权衡指纹算法的共谋抵抗性能和视觉保真度。实验结果表明,提出的指纹算法具有较好的抗共谋攻击能力和视觉保真度。
简介:Temperature-dependenceandexcitation-intensity-dependenceofphotoluminescencespectraforbothdisorderedandorderedGa0.52In0.48Paremeasured.Thedisorderedsampleischaractierizedbyitssinglepcakphotoluminescencespectrumwhichisexcitation-intensity.independentandhasdifferentactivationenergyatdifferenttemperatureregion.Theorderedsampleshowsdoublepeaks,theintensityofthehigh-energypeakhasananomalousincreasefirstlyandquenchesafterwards.Therelativehenomenaarereasonablyexplainedintermsoflatticeorderingandorientationsuperlatticemodel.
简介:摘要应用PET/CT诊断技术对恶性肿瘤患者进行早期诊断对其预后评估尤为重要,18F-氟脱氧葡萄糖(FDG)是目前核医学PET/CT诊断中最常用的正电子显像剂,其在鉴别病灶的良恶性、恶性肿瘤治疗的疗效评估以及疾病的术前评估中具有极大优势,已成为临床诊断不可或缺的影像学辅助手段。但其应用也有不便之处(如对患者有血糖和空腹的要求)。此外,颅脑和胃肠道的生理性摄取可能也会不同程度地影响临床医师做出正确诊断。68Ga标记的成纤维细胞激活蛋白抑制剂(FAPI)是一种以成纤维细胞激活蛋白为靶点的新型正电子显像剂,因其具有检查前患者无需禁食和静息等以及T/NT高等优势,已成为研究热点。笔者就68Ga-FAPI的靶点作用机制及临床应用进行综述。