学科分类
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35 个结果
  • 简介:Asateenagerin1972,BillGatesoncesaidthathewouldbeamillionairebythetimehewas20.Only15yearslaterhewasabillionaire.Andby1992,asheadoftheMicrosoftcompany,hebecametherichestmaninAmericawithassets(资产)ofaboutUS$6.3billion.

  • 标签: 高中 英语 专项练习 参考答案 阅读理解题
  • 简介:Thesphericalheadmodelhasbeenwidelyusedinmagnetoencephalography(MEG)asasimpleforwardmodelforcalculatingtheexternalmagneticfieldproducingbyneuralcurrentsinahumanbrain.Butthismodelmayleadtoaninaccurateresult,evenifthecomputationspeedisfast.Formoreprecisecomputation,realisticbrain-shapedheadmodelisusedwiththeboundaryelementmethod(BME),butatgreatlyincreasedcomputationalcost.WhensolvingMEGinverseproblembyusingoptimizationmethods,theforwardproblemmustoftenbesolvedforthousandsofpossiblesourceconfigurations.Soifthebrain-shapedheadmodelisusedinalliterativestepsofoptimization,itmaybecomputationallyinfeasibleforpracticalapplication.Inthispaper,wepresentamethodaboutusingcompoundheadmodelinMEGinversesolution.Inthismethod,firstsphericalheadmodelisusedforaroughestimation,thenbrain-shapedheadmodelisadoptedformoreprecisesolution.Numericalsimulationindicatesthatundertheconditionofsameaccuracy,thecomputationspeedforthepresentmethodisaboutthreetimesfasterthanamethodusingthebrain-shapedheadmodelatalliterations.

  • 标签: MAGNETOENCEPHALOGRAPHY (MEG) Boundary element method In
  • 简介:Accordingtothe"InternationalStandardofChineseHeadAcupoints"207patientssufferingfromstrokeweretreatedbyneedlingalongtheanteriorandposteriorobliguelinesofvertex-temporal,andtheline1andline2lateraltovertex.Themarkedlyeffectiverateaccountedfor73.43%ofthetotal,andtheoveralleffectiveraterepresented89.86%.Afterthetreatmentsomesymptomsashemiplegia,lingualdysfunction,facialandtongueparalysiswereobviouslyimproved(P<0.01).ThetherapeuticeffectofheadacupuncturewasobviouslybetterthanthatofWesternmedicine(P<0.01).Comparisonoftherapeuticeffectsmadeamongneedlingalongdifferentlinesandbetweenthoseappliedontheintactandaffectedsidesofthebodyshowedthattheywerealleffectiveinimprovingthesymptoms,buttherewasnosignificantdifference(P<0.05)

  • 标签: STROKE CEREBROVASCULAR DISORDERS HEAD ACUPUNCTURE
  • 简介:Location:Thelinefromthemiddlepointofeyebrowsuptotheanteriorhairline.Manipulation:Thechildliesonhisbackandthepractitionerstandsinfrontofthechild'shead.Fixtheheadwithtwohands,andkneadfromthemiddlepointofeyebrowsuptotheanteriorhairlinewithalternatebellyofhands(Fie.1).

  • 标签: 穴位 婴儿 推拿 头部 中医药疗法
  • 简介:ModelHeadofaFamilyPlanning"CentralHousehold"ModelHeadofaFamilyPlanning"CentralHousehold"Mrs.LiFuhuaisanordinaryruralwomenfarm...

  • 标签: FAMILY
  • 简介:Ji'aoGeophysicalExplorationCompanyofLiaohePetroleumAdministrativeBureausuccessfullyappliedahead-of-headVSPinterfacepredictionsintheMagu-2andMagu-3wellsinmidOctober.Thetwowellswerelocatedinthehigh,northtotheMagu-IwellintheMajuanziburiedhillbeltoftheLiaohewesterndepression.Seismicdatainthisareawaschaoticsothatdifficulttointerpret.Geologicalproblemsneededtobequicklyresolvedduringdrilling.

  • 标签: VSP界面预测 石油勘探 辽河 地球物理方法 地震波
  • 简介:Objective:Tosummarizetheperi-operativeexperiencefrom53patientswithtraumaticheadinjurieswithGCSscore3-5.Methods:Fifty-threemostseverelyhead-injuredpatientswithGCSscore3-5wereadmittedtoourdepartmentandtreatedoperativelyfromOct.1994toJun.1998andthedatawereanalyzedretrospectively.Results:Thirty-sevencases(69.8%)survived,amongthem28(52.8%)hadagoodrecoveryormoderatedisability,and9(17%)hadseveredeficits.Theother16(30.2%)diedaftertherapy.Conclusions:Theprognosisofmostseverelyhead-injuredpatientscouldbeimprovedbyperi-operativetreatmentincludingpremedicalcare,earlyevacuationofintracranialhematomawithlargedecompressivecraniectomies,intracranialhypertensionmonitoring,moderatehypothermiatherapy,effectivepreventionandtreatmentofcerebralvasospasmandcomplications.

  • 标签: 头部损伤 外科手术 围手术期 治疗
  • 简介:这篇论文分析多头mounter的集会时间的优化算法。在这篇论文的算法由四步组成。首先,喂ers基于分配部件“一对多的印射”。第二,它由充分利用“现场的嘴变化”把嘴分到头头。第三,它组织feeder组以便头能拣;把部件组放由组。最后,它把feeder组分到槽。结果证明算法在实践有好性能。

  • 标签: 装配 给料分配 优化算法 印制电路
  • 简介:AgeneralsolutionoftheBoussinesqequationispresentedwhichsolvestheproblemofinteractionofanynumberofright-goingandleft-goingsolitarywaves.Thesolutionreliesontheexactsolu-tionofGardner,Greene,Kruskal,andMiura(1967),andhasthesamedegreeofaccuracyasthatsolution,buthasawiderscopeofapplication.Itismuchsimplerthan,butasaccurateas,Hirota’sexactsolu-tion(1973)oftheBoussinesqequation,towhichthepresentsolutioniscomparedforthesimplestcaseoftwosolitarywavesinhead-oncollision.

  • 标签: INTERACTION of SOLITARY waves head-on collisions
  • 简介:INTRODUCTIONMagneticstimulationistheprocessofstimulatingexcitabletissuebyatime-varying,intensemagneticfieldwhichinducesanelec...

  • 标签: MAGNETIC STIMULATION INDUCED Electric FIELD Stimulating
  • 简介:摘要:在中介或先进的胰腺的头癌上改进辩解的效果。方法:手术与intermediated或先进的胰腺的头癌在26个病人被动。在癌上与一根电子横梁与intraoperative放射疗法相结合的Cholecystojejunostomy或choledochojejunostomy从1996年5月被执行到1998年5月。同时,多功能的可植入的药交货系统的导管为手术后的灌注化疗经由胃与十二指肠的动脉被插入。结果:327月后续调查建议肿瘤在治疗的功课以后在不同的度缩小了。所有病人疼痛被减轻。6月、12月、24月的幸存率是100%,93.9%和20%分别地。5个死了的病人的平均幸存时间是17.8个月。结论:这操作是很完成与中介或先进的胰腺的头癌延长病人的生活。

  • 标签: PANCREATIC CARCINOMA RADIOTHERAPY Operation PERFUSION CHEMOTHERAPY
  • 简介:客观:在代替的光线的头破裂的处理上用可吸收的大头针学习内部固定的效果。方法:从1999年5月到2004年5月,有代替的光线的头破裂的16个病人(梅森类型Ⅱ和Ⅲ)被可吸收的大头针与内部固定对待。后续的持续时间平均22.6个月(12-58月)。结果根据肘运动,X光线照相术的调查结果和功能的等级被估计20由Broberg和Morrey描出。结果:没有光线的头的avascularnecrosis,所有破裂在10个月以内愈合了。吝啬的肘屈曲损失是15°(0°-35°),和内转和旋后由10°减少了(0°-30°)平均与那些相比相反地侧面的肘。五个病人根据Borberg和Morrey的标准有优秀结果,6一好结果,和3一公平结果。结论:有可吸收的大头针的内部固定是在对待代替的光线的头破裂的一个有效方法。它能维持简历前臂的机械稳定性,改进肘功能并且避免第二操作。

  • 标签: 骨折 病理 治疗 临床
  • 简介:Objective:Tostudytheepidemiologicfeaturesofhighwaytrafficaccidentsbyanalyzingtheclinicaldataofthepatientsdiedofheadinjury.Methods:Thereaturesofthecases'age,occupation,statusofheadinjuryandcomplications.andtherescueprocedureswereretrospectivelyanalyzedbasedonthedataof214patientsdiedofheadinjury.Results:Themainvictimewereadults(78%)andpeasants(52.8%).Andtheostcommonheadinjurieswereseverecerebralcontusionwithintracranialhematomas(73.4%).Themeanarrivaltimefromtheaccidentspotstohospitalswas(2.2±1.9)h.Andthemeanintervaltimebetweenthearrivalandoperationwas(1.9±0.9)h.Primaryandsecondarybrainstemdamagewerethemaincausesofearlydeath.Yetpulmonaryinfectionandmultipleorgansfailurewerethecommonreasonsforlatedeath.Conclusions:Enhancingthepropagandafortrafficregulations,establishingperfectpre-hospitalandin-hospitalEMS(emergencymedicalservice)system,catchingtheopportunityofoperation,andpreventingcomplicationsareessentialtoreducethemortalityoftrafficaccidentsinducedheadtrauma.

  • 标签: 高速公路 交通事故 致死性头外伤 流行病学特性
  • 简介:Traumaticbraininjury(TBI)isamajorpublichealthproblemthroughouttheworld.Morethan400000patientswithTBIintheUnitedStatesofAmericaandmorethanamillionpatientswithTBIinChinaareadmittedtohospitaleveryyear.HeadtraumaisalsoNo.1killerofyoungpeopleinthedevelopedcountriesaswellasinsomedevelopingcountries.Unfortunately,theoutcomeofpatientswithsevereTBIisstillpoorallovertheworld.ThemortalityofsevereTBIpatients(GCS3-8)inmajorityofhospitalsisover30%andverysevereTBIpatients(GCS3-5)isover80%withonly15%functionalrecovery.1,2However,recentadvanceincerebralprotectionbymild(35-33℃)tomoderatehypothermia(32-30℃)iscertainlyencouraging,whichbringsneurosurgeonsthehopetoimprovetheoutcomeofsevereheadinjuredpatients.

  • 标签: 头部外伤 中度低温 疗效
  • 简介:TheexperimentwasperformedtoevaluatetheprogeniesofplantlinestransgenicforauxinsynthesisgenesderivedfromRiT-DNA.Fourlinesofthetransgenicplantswereself-crossedandtheforeignauxingenesinplantsofT5generationwereconfirmedbySouthernhybridization.Twolines,D1232andD1653,showedearlierfoldingofexpandingleavesthanuntransformedlineandthereforehadearlyinitiationofleafyhead.LeafcuttingsderivedfromplantoftransgeniclineD1653producedmoreadventitiousrootsthanthecontrolwhereasthecuttingsfromfoldingleaveshadmuchmorerootsthanrosetteleavesatfoldingstage,andthecuttingsfromheadleaveshadmorerootsthanrosetteleavesatheadingstage.Itisdemonstratedthatearlyfoldingoftransgenicleafmaybecausedbytherelativelyhigherconcentrationofauxin.Theseplantlineswithauxintransgenescanbeusedforthestudyofhormonalregulationindifferentiationanddevelopmentofplantorgensandforthebreedingofnewvarietywithrapidgrowthtrait.

  • 标签: 大白菜 转基因植株 外源植物激素基因 后代 叶状结球形成 卷心