简介：Thisworkinvestigatesinternalplasmaprocessparametersusingahairpinresonanceprobeandopticalemissionspectroscopy.ThedependenceofelectrondensityandatomicfluorineonthepercentageofoxygeninanSF6/O2dischargewasmeasuredusingthesemethods.AnRIEOxfordInstruments80pluschamberwasusedfortheexperiments.Twodifferentprocesspowers(100Wand300W)ataconstantpressure(100mTorr)wereused,anditwasfoundthattheopticalemissionintensityofthe703.7nmand685.6nmlinesofatomicfluorineincreasedrapidlyasoxygenwasaddedtotheSF6discharge,reachedtheirmaximumatanO2fractionof20%andthendecreasedwithfurtheradditionofoxygen.TheplasmaelectrondensitywasalsostronglyinfluencedbytheadditionofO2.

简介：ThedensityofNi-Alalloysinbothliquidstateandsolid-liquidcoexistencestatewasmeasuredwithamodifiedpycnometricmethod.ItwasfoundthatthedensityofNI-AlalloysdecreaseswithincreasingtemperatureandAlconcentrationinthealloys.ThemolarvolumeofliquidNi-AlbinaryalloysincreaseswiththeincreaseoftemperatureandAlconcentration.ThepartialmolarvolumeofAlinNI-Albinaryalloywascalculatedapproximately.ThemolarvolumeofliquidNI-Alalloydeterminedinthepresentworkshowsanegativedeviationfromtheideallinearmolarvolume.

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简介：Time-dependentdensity-functionaltheory(TDDFT)hasbeenappliedtocalculatetheelectronicstructureandsecond-ordernonlinearoptical(NLO)propertiesofsomeorganicmolecules.Thetwo-dimensional(2-D)chargetransfercharateristicsofcalculatedmoleculeswerestudiedandcomparedwithcorrespondingexperimentalresults.Allthetheoreticalresultsagreewellwiththemeasurement.For2-Dmoleculewithtwo-foldsymmetry,thedominantchargetransferisoff-diagonal,whileforthree-foldsymmetry2-Dmolecule,thedominantchargetransferisnotonlybetweenbranchesandcentralgroupbutalsoamongbranches.

简介：TimeevolutionofionosphericD-regionplasmasincludingtheperturbationsofelectronsandchargedaerosolparticlesisinvestigatedundertheconditionsofpolarmesospheresummerechoes(PMSE).ItisshownthatthetimescaleofdecayoftheelectrondensityisintheorderofanhourundertypicalPMSEconditions,inthemajorityofcases,theelectrondensityisanticorrelatedtotheiondensity,exceptthattheradiusofaerosolparticlesisgreaterthan50nm.Also,theevolutionsundervariedparameters,suchastheamplitudeandwidthofperturbation,theaerosolparticleradius,andthealtitudeofthePMSEoccurrenceareinvestigated.Theobtainedresultsareusefulforinterpretingtheexperimentalobservations.

简介：铝做了锌氧化物(偶氮)薄电影被DC磁控管在低底层温度劈啪作响准备。同轴的螺线管卷被放在磁控管目标附近提高血浆密度(Ji)。提高的血浆密度显著地改进了体积抵抗力()并且它在偶氮的电影的空间分发的同质。X光检查衍射(XRD)分析表明增加的Ji影响了crystallinity，压力松驰和另外的材料性质。偶氮的电影在模式显示出的低血浆密度(LPD)扔了显著变化在(从6.5ate温度固体氧化物燃料房间(SOFC)，哪个可能在500600点被操作?慀牲慥獲眠吗？

简介：Inordertofurtherimprovethecarriersynchronizationestimationrangeandaccuracyatlowsignal-to-noiseratio(SNR),thispaperproposesacode-aidedcarriersynchronizationalgorithmbasedonimprovednonbinarylow-densityparity-check(NB-LDPC)codestostudythepolarization-division-multiplexingcoherentopticalorthogonalfrequencydivisionmultiplexing(PDM-CO-OFDM)systemperformanceinthecasesofquadraturephaseshiftkeying(QPSK)and16quadratureamplitudemodulation(16-QAM)modes.Thesimulationresultsindicatethatthisalgorithmcanenlargefrequencyandphaseoffsetestimationrangesandenhanceaccuracyofthesystemgreatly,andthebiterrorrate(BER)performanceofthesystemisimprovedeffectivelycomparedwiththatofthesystememployingtraditionalNB-LDPCcode-aidedcarriersynchronizationalgorithm.

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简介：Background:Inthispaper,aregressionmodelforpredictingthespatialdistributionofforestcockchaferlarvaeintheHessianRiedregion(Germany)ispresented.Theforestcockchafer,anativebioticpest,isamajorcauseofdamageinforestsinthisregionparticularlyduringtheregenerationphase.ThemodeldevelopedinthisstudyisbasedonasystematicsampleinventoryofforestcockchaferlarvaebyexcavationacrosstheHessianRied.Theseforestcockchaferlarvaedatawerecharacterizedbyexcesszerosandoverdispersion.Methods:Usingspecificgeneralizedadditiveregressionmodels,differentdiscretedistributions,includingthePoisson,negativebinomialandzero-inflatedPoissondistributions,werecompared.Themethodologyemployedallowedthesimultaneousestimationofnon-linearmodeleffectsofcausalcovariatesand,toaccountforspatialautocorrelation,ofa2-dimensionalspatialtrendfunction.Inthevalidationofthemodels,boththeAkaikeinformationcriterion(AIC)andmoredetailedgraphicalproceduresbasedonrandomizedquantileresidualswereused.Results:ThenegativebinomialdistributionwassuperiortothePoissonandthezero-inflatedPoissondistributions,providinganearperfectfittothedata,whichwasproveninanextensivevalidationprocess.Thecausalpredictorsfoundtoaffectthedensityoflarvaesignificantlyweredistancetowatertableandpercentageofpureclaylayerinthesoiltoadepthof1m.Modelpredictionsshowedthatlarvadensityincreasedwithanincreaseindistancetothewatertableuptoalmost4m,afterwhichitremainedconstant,andwithareductioninthepercentageofpureclaylayer.Howeverthislattercorrelationwasweakandrequiresfurtherinvestigation.The2-dimensionaltrendfunctionindicatedastrongspatialeffect,andthusexplainedbyfarthehighestproportionofvariationinlarvadensity.Conclusions:Assuchthemodelcanbeusedtosupportforestpractitionersintheirdecisionmakingforregenerationandforestprotecti

简介：ThephotoluminescencepropertiesofBiTaO4∶Pr3+andBiTaO4atroomtemperaturewerestudied,andtheinfraredtransmissionanddiffusionreflectionspectraofBiTaO4weremeasured.ThephotoluminescencespectrumofBiTaO4peaksatabout420,440and465nm.Therehasanobviousexcitationbandfrom330to370nm.ThephotoluminescencespectrumofBiTaO4∶Pr3+consistsofthecharacteristicemissionofPr3+,anditsmainpeakisat606nmfrom3P0→3H6transitionofPr3+.Itsexcitationspectrumconsistsofthewidebandwithmaximumat325nm,thewidebandintherangeof375～430nm,andthecharacteristicexcitationofPr3+.Thebandsat325nmand375～430nmmaybefromtheabsorptionofthechargetransfertransitionofthetantalategroupanddefectenergylevelsinitsforbiddenband,respectively.ThereisenergytransferfromhosttoPr3+.BecauseboththehostdensityandphotoluminescencepeakintensityofBiTaO4∶Pr3+aresuperiortoPbWO4,BiTaO4∶Pr3+maybeapotentialheavyscintillator.

简介：BACKGROUND:Changesinthecardiacautonomicnerveareconsideredtobeimportantfactorsinthemechanismsofheartfailure.Itispossibletoreduceorslowdownnervedegenerationandnecrosis,providedthatpatientstakeeffectiveneuroprotectantsduringtheearlystagesofheartfailure.Moreover,itispossibletorelievethepathologicalprocessandreducetheriskofdeath.OBJECTIVE:Tostudytheeffectofgrowthhormonereleasingpeptide(GHRP)oncardiaccholinergicnervefiberdensitydistributioninaratmodelofheartfailure,andverifywhetherGHRPcanamelioratedenervation.DESIGN,TIMEANDSETTING:ArandomizedcontrolledstudywasperformedattheKeyLaboratoryofAnatomy,HarbinMedicalUniversity,betweenJuneandOctober2009.MATERIALS:Fiftyadult,healthy,female,Wistarrats,weighing(200±20)g,wererandomlydividedintoGHRP(n=30),model(n=10),andshamoperation(n=10)groups.GHRP-2wasmadeinShanghai,China(batchNo.z071212-03).METHODS:AcutemyocardialinfarctionwasestablishedbyligatingtheleftanteriordescendingcoronaryarteryintheGHRPandmodelgroups.Fiveweekslater,myocardialfunctionwasdetectedusingcolorultrasoundelectrocardiograph.Ejectionfraction<60%wasconsideredtobeasuccessfulmarkerofchronicheartfailuremodels.However,theleftanteriordescendingcoronaryarterywasnotligatedintheshamoperationgroup.TheGHRPgroupwasinjectedwith100μg/kgGHRP-2,andtheothertwogroupswereinjectedwiththesamevolumeofphysiologicalsaline,onceperday.MAINOUTCOMEMEASURES:After4weeks,pathologicalchangesincardiaccholinergicnervefibersweredetectedunderopticmicroscopyfollowinghematoxylin/eosinstaining.Inaddition,densitydistributionwasmeasuredusingamulti-functioncolorpathologicalimagesystem.RESULTS:Intheshamoperationgroup,myocardialcellswereregular,uniformlystained,andnoinflammatorycellswerepresent.Inthemodelgroup,myocardialcellswereunevenlystained,exhibitednuclearatrophy,degeneration,dissolution,ordisap

简介：Thegeometricalstructuresof2-(2-hydroxyphenyl)pyridine(PP)anditsprotonationstateswereoptimizedbymeansoftheB3LYP/6-31G(d)method.Foralltheselectedsystems,theexistenceofH-bondisinfavorofthestabilityofthesystems.Onthebasisoftheoptimizedgeometricalstructures,theirelectronicspectrumpropertieswerestudiedbytime-dependentdensityfunctionaltheory(TD-DFT)methosdviaahybridfunctionofB3LYPand6-31G(d)basisset.TheTD-DFTcalculationresultpredictstheabsorptionspectrumofPPat324nm(3.82eV),whichisinverygoodagreementwiththeexperimentalvalueof322nm(3.85eV)determinedinsolventchloroform.TheabsorptionspectraofthetwoprotonationstatesbothexertaredshiftinvariouspHmedia.

简介：与时间依赖者本地人密度近似的框架，对簇的光反应的有效描述被用来学习Na_2和Na_4簇的the.photo吸收十字节。我们的计算结果在对实验的好同意，这被显示出。另外，我们为Na_4簇的计算光谱比GW吸收光谱在对实验的更好的同意。

简介：WeuseamodifiedBecke-JohnsonexchangeplusalocaldensityapproximationcorrelationpotentialwithinthedensityfunctionaltheorytoinvestigatetheelectronicstructuresofHg1-xCdxTeandIn1-xGaxAswithxbeing0,0.25,0.5,0.75,and1.Forbothofthetwoseries,ourcalculatedenergygapsanddielectricfunctions（realpartε1andimaginarypartε2）areinagreementwiththecorrespondingexperimentalresultswithxbeingbetween0and1.Thecalculatedzero-frequencyrefractiveindexvariesgreatlywithxforHg1-xCdxTe,butchangeslittlewithxforIn1-xGaxAs,whichisconsistentwiththerealpartsoftheirdielectricfunctions.Therefore,thisnewapproachissatisfactorytodescribetheelectronicstructuresandtheopticalpropertiesofthesemiconductors.

简介：Athree-dimensionalcrustaldensitymodelbeneathNorthChinaisdeterminedusingP-wavetraveltimesandgravitydatumbysequentialinversionmethodinthispaper.Toimprovetheuniquenessofthesolution,weusedalinearrelationshipbetweenvelocityanddensitytoachievemutualconversionsandconstraintsbetweenvelocitydifferenceanddensitydifference.Algebraicreconstructiontechnique(ART)wasusedindensityinversion,whichhighlyimprovedthecalculationspeedcomparingwithcommonleastsquaresmethod.TheinversionresultsindicatethatthecrustaldensitybeneathNorthChinaisextremelyinhomogeneouswithitsdistributioncoherentwithregionaltectonics.ThelowercrustofTaihangmountaintectoniczoneshowsanobviouslowdensitycharacteristic.Weproposedthatitmaybeanindicatorofupwellingofmantlematerialsorpartialmeltingoflowermostcrust.

简介：Ahigh-density,high-fluxcirculatingfluidizedbed(CFB)riser(100mminIDand10.614minheight)wasappliedinawiderangeofoperatingconditions(withsolidfluxesupto400kg/m2sandsuperficialgasvelocitiesupto12m/s)toexamineitsradialnon-uniformitydynamics.Thesolidsholdupwasdeterminedthroughtheuseofafiber-opticprobeat11axiallevels.Theresultsindicatedthatunderalloperatingconditions,thehighsuperficialgasvelocityandlowsolidfluxesmaintainedalowradialnon-uniformityindex(RNI).Thehigh-density/fluxCFBriserhadseveraluniquecharacteristics,sothatthepeakoftheradialsolidsholdupprofileoccurredatapositionwithr/R=0.8.TheRNIandsolidsholdupatthecross-sectionalpositionhadagoodlogarithmicrelationshipatthelow-densitycondition(withameansolidsholdupof<0.2),andtheRNIdecreasedwhenthemeansolidsholdupexceeded0.2.InvestigationofthedynamicsofstratifiedinjectionrevealedthatthefeedratiohadanimportanteffectonGsandonsolidsholdupdistribution.Anovel"<"shapedaxialsolidsholdupprofilewasfound.Gsdecreasedsharplywhentheup-flowfeedratioexceeded0.5,andRNIwaslowestwhentheup-flowfeedratiowas1.

简介：Interfacialinternalwavesinathree-layerdensity-stratifiedfluidareinvestigatedusingasingularperturbationmethod,andthird-orderasymptoticsolutionsofthevelocitypotentialsandthird-orderStokeswavesolutionsoftheassociatedelevationsoftheinterfacialwavesarepresentedbasedonthesmallamplitudewavetheory.Asexpected,thethird-ordersolutionsdescribethethird-ordernonlinearmodificationandthethird-ordernonlinearinteractionsbetweentheinterfacialwaves.Thewavevelocitydependsonnotonlythewavenumberandthedepthofeachlayerbutalsoonthewaveamplitude.

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简介：锌(Zn)缺乏是限制米饭庄稼生长和产量的主要土壤限制，然而，忍耐机制的基因控制仍然糟糕被理解。这里，我们介绍了有希望的loci和候选人基因交谈忍耐给Zn缺乏并且通过协会分析识别了用一365?在多样的aus(半野的类型米饭)的K单个核苷酸多型性(SNP)标记数组面板。容忍的就职与相对稀罕的压力症状展出了更高的生长率。染色体上的二loci7和9强烈在一个山峰压力阶段在Zn缺乏下面与植物活力被联系。从一样的试验性的阴谋基于以前的microarray数据，我们加亮其表达式被重要遗传型或环境效果在Zn下面伴随的四候选人基因缺乏。网络基因本体论支持了已知的忍耐机制，例如维生素酸小径，并且也建议了光合作用基因的重要性克服Zn缺乏症状。