学科分类
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102 个结果
  • 简介:在无线传感器网络(WSN)当模特儿的名声,许多文学建议了有创造性的名声间接更改方法例如名声集成,打折,变老消除,并且过滤恶意的名声information.However,很少直接讨论了名声update.In这份报纸基于健全统计理论,为WSN的直接更改是建议方法是更合适的proposed.Results表演的在名声的一个否定二名制的分发方法并且

  • 标签: 无线传感器网络 负二项式分布 负二项分布 延缓衰老 统计理论 资源约束
  • 简介:Inthiswork,wesimulatenumericallythethermaleffectsinnitrogenatatmosphericpressurecausedbyanegativecoronaDCdischargeoflowcurrent.Amathematicalfunctionthatsimulatestheinjectionofthethermaltransferingasisproposed.Thesimulateddischargeisofanegativepointtoplanemasstype,withaninterelectrodedistanceof12mmandasymmetryabouttheaxisofdischarge.Thespatialandtemporalevolutionofneutralsisanalyzedbasedupontheequationsofcontinuity,momentumandenergyinacylindricalgeometry.Forthegeometryofthesystem,theFCT(fluxcorrectedtransport)procedurewasadopted.

  • 标签: 负电晕放电 数值模拟 热效应 几何形状 连续性方程
  • 简介:Inthispaper,thephotonicbandgapofphotoniccrystalswithchiralandnegative-indexmaterialsalternatelyisinvestigated.Itisshownthatthiskindofphotoniccrystalexhibitsverywidephotonicbandgap.Thephotoniccrystalswithadefectlayerhaveanarrowdefectmodeinthebandgap,whichcanbeusedasaverygoodfilteringmaterialbychoosingtheparametersofthedefectlayerproperly.

  • 标签: 负折射率材料 光子带隙 光子晶体 手性 过滤材料 缺陷层
  • 简介:ThecompleteopenreadingframeofOsPIN1awasamplifiedthroughreversetranscriptase-polymerasechainreaction(RT-PCR)basedonthesequencedepositedinGenBanktoexploretherelationshipbetweentheauxineffluxproteinOsPIN1aandthenegativephototropismofriceroots.SequencingresultsshowedthattheGCcontentofOsPIN1awas65.49%.ThefusionexpressionvectorpCAMBIA-1301-OsPIN1a::GFPcontainingtheOsPIN1ageneandacodinggreenfluorescentprotein(gfp)genewasconstructed.ThefusionvectorwastransferredintoonionepidermalcellsbyAgrobacteriumtumefacienstransformation.ThetransientexpressionofOsPIN1a-GFPwasmainlylocatedinthenucleusandcellmembrane.Moreover,thetransgenicplantswereobtainedbyAgrobacterium-mediatedgenetictransformation.MoleculardetectionperformedbyusingPCRandβ-glucuronidasestainingshowedthatthetargetconstructwasintegratedintothegenomeofrice.Thenegativephototropiccurvaturesofthetransgenicricerootswerehigherthanthoseofthewildtype.Similarly,theexpressionlevelsofOsPIN1ainthetransgenicplantswereconsiderablyhigherthanthoseinthewild-typeplants.TheseresultssuggestthatOsPIN1aiscrucialinthenegativephototropiccurvatureofriceroots.

  • 标签: RICE OsPIN1a green FLUORESCENT protein TRANSIENT
  • 简介:Thisstudywasonsuperiorityofthenon-negativematrixfactorization(NMF)algorithmforapplicationofinformationextractedwithaerialimages.First,NMFwasusedforaerialimageinformationextraction,andthenthisdatawascomparedwithaprincipalcomponentanalysis(PCA)inwhichr(thenumberofrowsorcolumnsofbasicmatrix)andEignum(thenumberofeigenvalues)weregivendifferentvalues.ExperimentalresultsshowedthattheruntimeofNMFwithr=20or50waslessthanthatofPCAwithanEignum=20or50.Also,therecognitionrateofNMFwithr=50washigherthanthatofanEignum=50.Theexperimentshowedthatnonnegativematrixfactorizationhadadvantagesofashorttimeperiodwithahighrecognitionrate.

  • 标签: FOREST management non-negative matrix factorization(NMF) AERIAL
  • 简介:Toexploretheprevalenceoftheplasmid-mediatedquinoloneresistancegeneqnrAinGram-negativebacteriaandtoinvestigateitsmoleculargeneticbackgroundandresistanceprofileinisolatesharboringthisgene,atotalof629nalidixicacid-resistantisolatesofnon-repetitiveGram-negativebac-teriawerecollectedfromclinicalspecimensbetweenApril2004andApril2006andtheseisolateswerescreenedforqnrAgenebyPCRusingspecificprimerscombinedwithDNAsequencing.Theextendedspectrumβ-lactamase(ESBL)orAmpC-producingisolatesweredistinguishedbythephenotypicconfir-matorytestcombinedwithDNAsequencing,andtheantibioticssusceptibilitytestforqnrA-positiveiso-lateswascarriedoutbyKirby-BauerandE-testmethod.TodetectthelocationoftheqnrAgene,plas-midconjugationandSouthernhybridizationwereperformedandtheintegronstructurecontainingtheqnrAgenewasclonedbyPCRstrategyandsequencedbyprimerwalking.ItwasdemonstratedthattheincidenceoftheqnrA-positivestrainsinnalidixicacid-resistantbacteriawas1.9%(12/629),inwhichthedetectionratesforKlebiesiellapneumoniae.Enterobactercloacae,Enterobacteraerogenes,CitrobacterfreundiiandSalmonellachoeraesuiswere2.2%(3/138),17.1%(6/35),9.1%(1/11),12.5%(1/8),and14.3%(1/7),respectively.TheqnrAgenewasfoundtobeembeddedinthecomplexsu/1-typeintegronlocatedonplasmidswithvariedsize(80-180kb).Amongthem,4qnrA-positiveisolatescarriedintegronIn37and8isolatescarriedanovelintegron,temporarilydesig-natedasInX.AlltheqnrA-positiveisolateswereESBL-producingandtransferableforthemuhi-drugresistance.Itisconcludedthattheplasmid-mediateddrug-resistancemechanismexistsinthequinoloneresistantstrainsofisolatesfromhospitalsinGuangdongarea,buttheincidencewasratherlow.Never-theless,itisstillpossiblethatthehorizontaltransferoftheresistantqnrAgenemightleadtothespreadingofdrug-resistance.

  • 标签: 药品抗药性 细菌 序列分析 DNA克隆
  • 简介:AIM:Toevaluateshort-termoutcomesfollowingintraoperativebiliarylavageforhepatolithiasis.METHODS:Atotalof932patientswhowereadmittedtotheWestChinaMedicalCenterofSichuanUniversitybetweenJanuary2010andJanuary2014andunderwentbileductexplorationandlithotomywereretrospectivelyincludedinourstudy.Thepatientsweredividedintothelavagegroupandthecontrolgroup.Relatedpre-,intra-,andpostoperativefactorswererecorded,analyzed,andcomparedbetweenthetwogroupsinordertoverifytheeffectsofbiliarylavageontheshort-termoutcomeofpatientswithhepatolithiasis.RESULTS:Amongstthepatientswhowereincluded,678patientswithhepatolithiasiswereincludedinthelavagegroup,andtheother254patientswereenrolledinthecontrolgroup.Dataanalysesrevealedthatpreoperativebaselineandrelatedintraoperativevariableswerenotsignificantlydifferent.However,patientswhounderwentintraoperativebiliarylavagehadprolongedpostoperativehospitalstays(6.67dvs7.82d,P=0.024),higherhospitalizationfees(RMB28437.1vsRMB32264.2,P=0.043),higherpositiveratesofbacterialculturesfromblood(13.3%vs25.8%,P=0.001)andbile(23.6%vs40.7%,P=0.001)samples,andincreasedusageofadvancedantibiotics(26.3%vs38.2%,P=0.001).Inaddition,inthelavagegroup,morepatientshadfever(>37.5℃,81.4%vs91.1%,P=0.001)andhyperthermia(>38.5℃,39.7%vs54.9%,P=0.001),andhigherwhitebloodcellcountswithin7daftertheoperationcomparedtothecontrolgroup.CONCLUSION:Intraoperativebiliarylavagemightincreasetheriskofpostoperativeinfection,whilenotsignificantlyincreasinggallstoneremovalrate.

  • 标签: HEPATOLITHIASIS BILIARY LAVAGE POSTOPERATIVE infection
  • 简介:在线上的顺序三的方程被显示出全球性好的为概括Korteweg-deVries的起始的价值问题为不平的数据摆姿势。我们的证明基于Colliander,龙骨,Staffilani,Takaoka,和道介绍的多线性的估计和我方法。

  • 标签: KDV方程 多线性估计 SOBOLEV空间 负指数
  • 简介:INTRODUCTIONItiscommonknowledgethatthedevelopmentandoccurrenceofanearthquakeisaverycomplicatedgeophysicalprocess.Anearthquakeiscausedbythelocalfailureoftheearthcrustmedium,andearthquakesaredistributedinhomogeneouslyinspace.Seismicactivities,however,arearealreflectionoftheinteractionofthefaults,whichprovidesussomeinformationconcerningtheearthcrustmediumandmayhelpuspredicttheearthquake.Therefore,thestudyoftheseismicitypatterncanbecomeameansofearthquakeprediction.Inordertoreflectdirectlythespacialdistributionofseismicactivities,thesketchofepicentraldistributionhasbeenwidetyusedinthestudy

  • 标签: CRUST GEOPHYSICAL SKETCH epicenter concerning QUAKE
  • 简介:NanoporousanataseTiO2(np-TiO2)electrodeshavebeendevelopedviatheanodizationoftitaniumfoilsinfluoridecontainingelectrolytes,anditsapplicationinrechargeablelithium-ionbatteries(LIBs)wasinvestigated.Fourdifferenttypesofnp-TiO2electrodeswithdifferentporediametersof14.7±8.2nm,12.8±6.8nm,11.0±5.5,and26.7±13.6nmwerefabricatedforevaluatingtheeffectofnanoporouscharacteristicsontheLIBperformance.Thedischargecapacityofthefourbatterytypes1,2,3,and4were132.7mAhg-1,316.7mAhg-1,154.3mAhg-1,and228.4mAhg-1,respectively.Inaddition,theseelectrodes1,2,3,and4exhibitedreversiblecapacityof106.9mAhg-1after295th,180.9mAhg-1after220th,126.1mAhg-1after150th,and206.7mAhg-1after85thcycleatarateof1C,respectively.Itwasnotedthatthecycliclifeofthebatterieshadaninverserelationship,andthecapacityhadaproportionalrelationshiptotheporediameter.Theenhancedelectrochemicalperformanceofthenanoporouselectrodescanbeattributedtotheimprovedconductivityandtheenhancedkineticsoflithiuminsertion/extractionatelectrode/electrolyteinterfacesbecauseofthelargespecificsurfaceareaofnp-TiO2electrodes.

  • 标签: 纳米二氧化钛 锂离子电池 电化学性能 多孔电极 负极 放电容量
  • 简介:Chiral导致异例的否定磁致电阻(NMR)广泛地在拓扑的半金属为Weyl费米子的存在被用作批评运输证据。在这微型评论,我们在非中心对称的NbP和NbAs讨论NMR现象的一般观察。我们证明NMR能从Weyl费米子或外来的效果的内在的chiral异例产生,例如霍尔信号的重迭;地依赖者在体积的不同类的当前的流动,即,当前的jetting;并且共存的小搬运人的弱本地化(WL)。控制WL的NMR重重地依赖于样品质量并且被一条显著转线路描绘从对在提高的温度的否定先生生长积极,源于在阶段连贯时间和体积的纺纱轨道的散布常数之间的比赛小衣袋。因此,没有赞美技术的支持,在NMR之间的关联和chiral异例需要被细看。因为上升旋转退化,Weyl费米子的旋转取向与动量平行或反平行,它是作为helicity知道的一个唯一的物理性质。helicity的保存为Weyl费米子的运输提供强壮的保护,它能被磁性的杂质有效地仅仅散布。与磁性、无磁性的杂质的化学的做因此是比为检测Weyl费米子的存在的NMR方法更有说服力的。

  • 标签: NBP 半金属 NBA 负磁阻效应 异常 手性
  • 简介:APoissonregressionmodelandanegativebinomialregressionmodel(NBmodel)areoftenusedinareassuchasmedicineandeconomy,butrarelyinthedomesticforestrysector,especiallyintheforestfireforecasting.BasedonthedataofforestfireoccurrencesinDaxing’anlingregionin1980-2005,thispaperprofoundlyanalyzestheapplicationconditionsandtestmethodsofthetwomodels.TheAICmethodwasusedtocheckthefittinglevelofthemodelsandthecapabilityofthemodelsforforecastingforestfireswasdiscussed.ThisstudyprovidednecessarytheoreticalbasisanddatasupportfortheapplicationofthetwomodelsinthefieldofforestryinChina.

  • 标签: FOREST fire POISSON MODEL NEGATIVE BINOMIAL