简介:Theeffectofhydrogenpassivationonmulticrystallinesilicon(mc-Si)usedforsolarcellsisdescribed,andthemechanismofhydrogendiffusionandpassivationisalsoinvestigated.Then,thehydrogenpassivationprocessesappliedinindustriesandresearchlaboratoriesareintroduced.Finallytheexistingproblemsandtheprospectsofhydrogenpassivationarereviewed.
简介:Thisstudytestedfivemethodswidelyusedinestimatingthecompletemagnitudes(MC)ofearthquakecatalogs.Usingcatalogsofobservedearthquakeproperties,wetesttheperformanceofthesefivealgorithmsunderseveralchallengingconditions,suchassmallvolumeofeventsandspatial-temporalheterogeneity,inordertoseewhetherthealgorithmsarestableandinagreementwithknowndata.Wefindthatthemaximumcurvaturemethod(MAXC)hasperfectstability,butwillsignificantlyunderestimateMCunlessheterogeneityisabsent.MCestimatedbytheb-valuestabilitymethod(MBS)requiresmanyeventstoreachastableresult.Resultsfromthegoodnessoffitmethod(GFT)wereunstablewhenheterogeneityloweredthefitnesslevel.Theentiremagnituderangemethod(EMR)isrelativelystableinmostconditions,andcanreflectthechangeinMCwhenheterogeneityexists,butwhentheincompletepartoftheearthquakecatalogisdismissed,thismethodfails.Themedian-basedanalysisofthesegmentslopemethod(MBASS)cantoleratesmallsamplesize,butisincapableofreflectingthemissingdegreeofsmalleventsinaftershocksequences.InconditionswhereMCchangesrapidly,suchasinaftershocksequences,observingthetimesequencedirectlycangiveapreciseestimationofthecompletesub-catalog,butonlywhenthenumberofeventsavailableforstudyislargeenoughcantheMAXC,GFT,andMBSmethodsgiveasimilarlyreliableestimation.
简介:TotesttheantigenicactivityofMprotein(Mcprotein)intheinnermembraneofSARS-CoV,SARS-CoVMcprotein'sbaseslocatinginsidethemembranewerecloned,theHis-fusionproteinwasexpressedinE.coliandanalyzedforitsantigenicactivity.Amongthose7clinicallydiagnosedpatients'sera,therewere5positiveand2negativeinreactionwithHis-fusionprotein.Allofthe20healthypersons'seraandrabbitanti-OC43and229EwereofnegativereactionwithHis-fusionprotein.TheanimalsimmunizedwithHis-fusionproteinhaveproducedmulti-clonalantibody.TheHis-fusionproteincouldspeciallyreactwithclinicallydiagnosedSARSpatients'seraandtheanimalsimmunizedwithHis-fusionproteincouldproducespecificallymulti-clonalantibody,butitcouldnotreactwiththeseraofhealthypersonsandtherabbitanti-OC43and229E.
简介:摘要:国内尼龙磨削技术尚未成熟,公司在尼龙磨削方面也没有任何的加工经验,通过开展尼龙薄壁衬套磨削研究来解决封包夹具中定位销表面陶瓷层脱落,利用尼龙材料代替陶瓷绝缘的技术难题,同时填补公司在尼龙磨削技术上的空白。