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1.
MATERIALSANDMETHODS1 AfterselectingthreeendemicareasofKBD,suchasMangkeng,FanrongandNanyuanandaneighboringnon-endemicfieldforeachoneinYulin,Shaanxi〔1〕,weexaminedchildrenagedfrom6to12intheseareaswithroentgenography.Thepatientsandendemicareaswererespect…  相似文献   

2.
ByusingCBCL(ChildBehaviorChecklist)ofXi′annorm,thechildren'sbehaviorproblemsinXi′anhavebeeninvestigatedandcomparedwiththeresultsobtainedbefore1993,thepositiveresultsprovidescientificbasisfordiagnosisandreferenceforteachers.MATERIALSANDMETHODSThepupil…  相似文献   

3.
NUCLEAROPERATORSONC(Ω,X)HeChen(DepartmentofAppliedMathematics)AbstractThispaperistodecidethenuclearoperatoronthespaceofvector...  相似文献   

4.
Antiphospholipidantibodies(APA)areimmunoglob ulinsoftheIgG ,IgMandIgAclasseswithspecificityfornegativelychargedphospholipidandincludeanticardiolipinantibodies(ACA) ,lupusanticoagulants(LA )andan tiphosphatidylserineantibodies[1] .Usually ,determinationofACA Ig…  相似文献   

5.
AlthoughtheAlzheimer’sdisease(AD)wasdis coveredbyAloisAlzheimer ,aGermanneuropatholo gist,inearly 2 0century ,itdidnotgainmuchpublicattentionuntilthelasttwodecades .Asthelifespanofhumanbeingsprolongs ,thenumberofpersonswithADhasalsoincreased .Besidescancerand…  相似文献   

6.
Alzheimer’sdisease (AD)isthemostcommondementiainthesenior ,andthereisnocureoreffec tivetreatment .AlthoughtheetiologyofAlzhei mer’sdiseaseisnotfullyunderstood ,accumulatingevidencedemonstratesthatboththeconcentrationofthesomatostatin (SS)andtheSSneuronsinth…  相似文献   

7.
IntroductionAsynchronousTransferModehasbeengivenconsiderableattentionasapowerwayofaccom-plishinganintegratedservicenetwork[1].InATMNetworks,informationisdividedintoshortfixed-lengthentities,calledcells,whichareprovidedwithflowidentificationlabels,and…  相似文献   

8.
Adenosine (Ado)isanendogenouspurinenu cleosidethatregulatesmanyphysiologicalandpatho physiologicalprocessesinbody .Theeffectsoncard iovascularsystemareespeciallyobvious .Peoplefoundthatacetylcholine (ACh)andadenosinehadthenegativeinotropic ,negativechronotr…  相似文献   

9.
IntroductionAir-GroundRanging(AGR)isaroutinetaskofairborneradar.Differentradarsystemsusedif-ferentmethodstoaccomplishAGR.Non-phase-coherentradarsystemusesthemethodofrangegatetotrackthezero-passingpointofthediffer-encesignalinordertoaccomplishAGR.Whil…  相似文献   

10.
THEEFFECTOFHBsAgANTIGENEMIAONPREGNANCYYueYafei;ZhangShulin;LIGuilin;(DepartmentofObstetricsandCynecology,FirstcffiliatedHospi...  相似文献   

11.
IntroductionAir-poweredmotorshavetheadvantagesoflowcost,goodpower-to-weightratio,andintrinsi-calysafeoperation[1].Thesecharac...  相似文献   

12.
IntroductionWhentheinitialresponseofadynamicsystemisinadirectionoppositetothefinaloutcome,itiscalledaninverseresponse.Thebehaviorofboil-erscalledshrinkandswellisatypicalexampleoftheinverseresponse[1,2].Anotherexampleistheindustrialdistillationcolumn[…  相似文献   

13.
Percutaneoustransluminalcoronaryangioplasty(PTCA )isoneofthemostcurrenttherapiesforcoronaryarterydisease ,butitremainslimitedbya30 %to 6 0 %restenosisrate .Intravascularbrachytherapy (IVB)isaneffectivemethodtoinhibitcoronaryrestenosisafterPTCA .Anewconceptofpre…  相似文献   

14.
Alringsinthispaperareassociativewithiden-tity,andalmodulesleftunital.Recalthatgiv-enanyringhomomorphismf∶R→S,thereisaninduced...  相似文献   

15.
ND SQUEALTX@蒋伟康IntroductionBecauseofitshighreliability,greatbrakingpowerandlowprice,adrumbrakeisoftenusedintrucksandbuses.However...  相似文献   

16.
ON A CONSTANT OF QUASICONFORMAL DEFORMATION   总被引:1,自引:0,他引:1  
IntroductionAcontinuousreal-valuedfunctionf(x)ontherealaxisRissaidtobelongtoZygmundclassΛ(R)ifitsatisfies‖f‖z=supx,t∈Rf(x+t)-2f(x)+f(x-t)t<+∞(1)Acontinuouscomplex-valuedfunctionF(z)iscalledaquasiconformaldeformationifithasgen-eralizedderivationFand…  相似文献   

17.
RepeatedrestraintstressoracombinationofdailystressorsinratsinducedatrophyofhippocampusCA3pyramidalneruons〔1〕,whereasithadbeenreportedthattheelevatedcirculationadrenalsteroidssecretedduringstressmaybeinvolvedintriggeringthemorphologicalalterationssuch…  相似文献   

18.
Homograftaorticvalve(HAV)hasbeenusedinclinicalpracticefor30years.Ithasshowedmanysuperioritiescomparedwithmechanicalvalveandhetero-tissuegrafts.HAVisanaturalvalve.Itshistologicalstructureandmorphologicalfunctionaresimilartonormalphysiologicalsituation…  相似文献   

19.
Acetylcholinesterase(AchE)isahydrolyticenzymewithextensivedistributioninthecentralnervoussystem ,andithasfrequentlybeenusedasachemicalmarkerforthestudyofpresumedcholinergicstructuresinbrain .Theliteraturesreportedthattherewasacloserelationshipbe tweenth…  相似文献   

20.
IntroductionTherehavebeenfivemergersandacquisitions(M&As)wavesinthehistoryofeconomicdevel-opment.Economistshavemanyideastoexplaintheincentivesofeachwave.Generally,gettingscaleeconomyisregardedasthemainreasonofthehorizontalmergerwave.Theverticalmerger…  相似文献   

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