简介：Inthispaper,weintroducethenotionofexcellentextensionsofrings.LetFbeanexcellentextensionofanArtinalgebra∧,weprovethat∧satisfiestheGorensteinsymmetryconjecture(resp.,finitisticdimensionconjecture,Auslander-Gorensteinconjecture,Nakayamaconjecture)ifandonlyifsodoesF.Asaspecialcaseofexcellentextensions,whenGisafinitegroupwhoseorderisinvertiblein∧actingon∧and∧isG-stable,weprovethatiftheskewgroupalgebra∧GsatisfiesstrongNakayamaconjecture(resp.,generalizedNakayamaconjecture),thensodoes∧.

简介：NorthwestElectricPowerDesignInstitute(NWEPDI)wasestablishedin1956.Theinstituteundertakestheengineeringexploration,surveyanddesignofthermalelectricpowerplant,conventionalislandofnuclearpowerplant,powertransmissionandsubstationprojects,designofthe1stand2ndclasspressurevessels,electricpowersystemplanning,environmentalprotectionengineeringmonitoring,assessmentanddesign,variousindustrialandcivilarchitecturaldesignandthescicntificresearchandtechnicaldevelopmenttasksofcorrespondingspecialities.Theinstituteis

简介：NearlyoneinfiveU.S.workersclaimstobeinexcellenthealth——despitebeingoverweight,smoking,drinkingtoomuchorneverexercising,accordingtoanewlypublishedsurvey.Inthenationwidestudyof1,450employedadultsreleasedbyOxfordHealthPlansInc.,17percentdescribedtheirhealthasexcellentbutdisplayednot-so-excellenthabits.Ofthosepeople,55percentsaidtheywereatleast25pounds(11kg)overweight,choolardenfgh31percentsmoked,21percentdrankatleastthreeglassesofalcoholaday,29per...

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简介：IntroductionExtensiveReading,asthenameindicates,isaguideforstudentsintothevastseaofknowledge.Readingdemonstratestostudentsthatthereisnoendinlearningknowledge.However,readingandlanguagelearningbasedontextbooksisfarfromenoughbecausetheknowledgefromthemistoonarrow,thevocabularyistoolimitedandthecontentsarenotcurrentenoughinthesetimesofinformationexchange.Throughoutmyteachingexperiments,Ihavefoundthatnewspaperclippingscanbecomeaverygoodwaytobringmorebenefitstostudents’learningthanIexpected.Itcanbroadenthestudents’horizons,

简介：Inthisarticle,weshowthatifXisanexcellentsurfacewithrationalsingularities,theconstantsheafQeisadualizingcomplex.IncoefficientZe,wealsoprovethattheobstructionforZetobecomeadualizingcomplex,liesonthedivisorclassgroupsatsingularpoints.Asapplications,westudytheperversesheavesandtheweightsof-adiccohomologygroupsonsuchsurfaces.

简介：Asimpleroutetosynthesizethepolyaniline(PANI)nanofiberswithdiameterabout150nmwasreported.Inthisstrategy,thePANInanofiberswerefabricatedbyelectrochemicaldepositionbyusingtwo-electrodeconfigurationin0.01Manilineand0.01MH2SO4electrolytes.Theas-preparedmaterialswerecharacterizedbyscanningelectronmicroscopy(SEM),infraredspectroscopy(FTIR),Ramanspectroscopyandthermogravimetricanalysis(TGA).TheelectrochemicalpropertiesofthePANInanofiberselectrodeassupercapacitormaterialswereinvestigated.ThePANInanofiberselectrodeshowedhighcapacitanceof485F·g-1at0.1A·g-1,andthedecreaseinthespecificcapacitanceisabout3.5%in1000cycles.TheresultsindicatethatthePANInanofiberselectrodeshowshighstabilityandretainsitselectrochemicalcapacitancepropertyover1000cycles,suggestingPANInanofibershavepromisingapplicationsinhigh-performancesupercapacitors.

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简介：Inthepresentstudy,themarketneedsforthedevelopmentofsteelplateswithexcellentheataffectedzone(HAZ)toughnessareanalyzed,andthemechanismofthedecreaseintheHAZtoughnessduringhigh-heatinputweldingisdiscussed.TheimportantcountermeasureforimprovingtheHAZtoughnessistoemploythetechnologyofoxidemetallurgy,namely,tomakeuseoffineinclusionparticlesforimprovingthemicrostructureofHAZ.TheprogressandtheoriesofoxidemetallurgytechnologiesdevelopedintheNipponSteelCorporation(NSC),theJFESteelCorporationandtheKobeSteelGroupareillustrated.SteelplatesdevelopedbythesethreecompanieswithexcellentHAZtoughnessareintroduced.

简介：AnovelInGaAs/InAlAscoupledquantumwellstructureisproposedforlargefield-inducedrefractiveindexchangewithlowabsorptionloss.Inthecaseoflowappliedelectricfieldof15kV/cmandlowabsorptionloss(±≤100cm-1),alargefield-inducedrefractiveindexchange(fortransverseelectric(TE)mode,△n=0.012;fortransversemagnetic(TM)mode,△n=0.0126)isobtainedinthestructureattheoperationwavelengthof1.55μm.Thevalueislargerbyoveroneorderofmagnitudethanthatinarectangularquantumwell.Theresultisveryattractiveforsemiconductoropticalswitchingdevices.

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简介：趁繁花还未开至荼蘼,趁现在还年轻。还可以走很长的路,还能诉说很深很深的思念。去寻找那些曾经出现在梦境中的路径、山峦与田野吧。——毕淑敏童年的我也曾躺在草地上,望着头顶洁白的云朵和湛蓝的天空,心里有无限的遐想。曾经依赖父母温暖的怀抱,留恋那些美丽的童话故事,舍不得那融化在舌尖的甜味。终于随着时间流逝,我被一股强大的力量从那片草地上拽了起来,被卷入一条奔腾不息的大河,河的名字,叫生活。

简介：Inrecentyears,theconcernaboutenvironmentalprotectionisincreasingonaworldscale.MajormanufacturersofhomeappliancesandOAequipmenthaveintroducedso-called'greenprocurementschemes'forreducingenvironmentallyharmfulsubstancesinmanufacturingprocessandendproducts.Undersuchbackground,anewtypeofchromate-freeorganiccompositecoatedelectro-galvanizedsteelsheetwithhighconductivitywasdevelopedbyBaosteel,whichmeetstheEURoHSDirective(RestrictionoftheHazardousSubstances)andotherrelatedlawsandregulationsonenvironmentalsafety.Italsoprovidesexcellentsurfaceelectricalconductivity,corrosionresistance,fingerprintresistance,solventresistance,coatingadhesion,heatresistance,formabilityandotherspecialpropertiestomeetthedemandofmanufacture’sprocessofOAmachine.Comparedwithpreviouslydevelopedanti-fingerprintingcoatedelectro-galvanizedsteelsheet,thisnewlydevelopedproducthasagoodbalancebetweenhighcorrosionresistance(timeto5%whiterustinsaltspraytestis120hforflatpaneland72hforworkedpotion)andconductivity(surfaceelectro-resistivityinaccordancewithLOREASTislessthan0.1milliohm)duetothespecialdesignofcoating’sstructure.Besides,Italsoprovidesthepropertiesofgroundingandshieldingagainstelectromagneticwaves.Theevaluationofsurfaceperformancesofnewproductshowedthatitiscomparableorevenbetterthanthesimilarproducts.Currently,thenewlydevelopedproducthasbeencommercialized.Inthispaper,themajorpropertiesarediscussed,suchascorrosionresistance,surfaceelectricalconductivity,fingerprintresistance,solventresistance,coatingadhesion(ink/melaminealkydpaint),heatresistanceandformability.Furthermore,theapplicationisalsobrieflydescribed.

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简介：他,一个人坐在椅子上,背靠着墙,盯着壁钟,等着……一小时过去了,他慢慢地从椅子上挪下来,颤巍巍地打开砂锅盖,从里面盛出一碗温热的中药,青筋暴突的双手缓缓地将汤药送到嘴边。不一会儿,房间里便弥漫了一股浓浓的苦涩的药味。

简介：思绪伴着午后的阳光弥漫，举目远眺，秋水飘渺澄澈依然。心中纷纷感念，点点滴滴，渐渐沉积，凝聚成隽永而深沉的等待……

简介：昏黄的灯光映照出一个佝偻的身影，原来是老人倚在锈迹斑斑的门框边，翘首望着屋前蜿蜒崎岖的小路，嘴里不住地念叨着：“这孩子什么时候回来呀？”不知过了多久，老人揉了揉布满褶子的眼角，缓缓地转身，颤颤巍巍地往屋里走去。

简介：这阵子，战云密布，大家在等待开始。开战了，烽火漫天，大家又在等待终战。等的时间令人有室息感，很难熬，然而世事总在等待中次第开展。