学科分类
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377 个结果
  • 简介:Theguaranteedcostcontrolproblemfornetworkedcontrolsystems(NCSs)isaddressedundercommunicationconstraintsandvaryingsamplingrate.Firstofall,asimpleinformation-schedulingschemeispresentedtodescribetheschedulingapproachofsystemsignalsinNCSs.Then,basedonsuchaschemeandgivensamplingmethod,thedesignprocedureindynamicoutputfeedbackmannerisalsoderivedwhichrenderstheclosedloopsystemtobeasymptoticallystableandguaranteesanupperboundoftheLQperformancecostfunction.

  • 标签: 网络控制 采样率 信息调度 线性矩阵不等式
  • 简介:ThispaperpresentsafurtherimprovedProductionActivityControlArchitecturetodealwiththecomplexityofinformationbycreatingSub-ProducersandSub-MoverswhichwillnotonlygiveabettercontrolatworkstationlevelbutalsoreduceloadontheDispatcher.ItalsomakesananalysisofthebasicandimprovedPAC(ProductionActivityControl)ArchitectureintheControlSystemforIntegratedManufacturing.ThePACArchitectureandtheimprovementwillfurtherenhancetheflexibilityandadaptabilityofthearchitectureintheeverchangingenvironmentoftheShopFloorControl(SFC)Systems.

  • 标签: MANUFACTURING system SHOP FLOOR CONTROL PRODUCTION
  • 简介:Weinvestigatetheproblemofteleportationofunitaryoperationsbyunidirectionalcontrol-statetelepor-rationandproposeaschemecalledunidirectionalquantumremotecontrol.Theschemeisbasedontheisomorphismbetweenoperationandstate.Itallowsustostoreaunitaryoperationinacontrolstate,therebyteleportatSonoftheunitaryoperationcanbeimplementedbyunidirectionalteleportationofthecontrol-state.WefindthattheprobabilityofsuccessforimplementinganarbitraryunitaryoperationonarbitraryA~-qubitstatebyunidirectionalcontrol-stateteleportationis4^-M,and2Mebitsand4Mcbitsareconsumedineachteleportation.

  • 标签: 量子信息 单向性 量子遥控 量子输运 控制状态 远距离传输
  • 简介:Apressurizerisoneofimportantequipmentinapressurizedwaterreactorplant.Itisusedtomaintainthepressureofprimarycoolantwithinallowedrangebecausethesharpchangeofcoolantpressureaffectsthesecurityofreactor,therefor,thestudyofpressurizer'spressurecontrolmethodsisveryimportant.Inthispaper,anadaptivefuzzycontrollerispresentedforpressurecontrolofapressurizerinanuclearpowerplant.Thecontrollercanon-linetunefuzzycontrolrulesandparametersbyself-learningintheactualcontrolprocess,whichpossessesthewayofthinkinglikehumantomakeadecision.Thesimulationresultsforapressurizedwaterreactorplantshowthattheadaptivefuzzycontrollerhasoptimumandintelligentcharacteristics,whichprovethecontrolleriseffective.

  • 标签: 模糊控制 加压器 压力控制 水反应器
  • 简介:HIVinfectionandAIDShasemergedasamajorpublichealthproblemallovertheworld.Inthe1980s,theinfectionwasfirstfoundtobetransmittedthroughhomosexualactivityandbloodproducttransfusion.Nowitisspreadingamongheterosexualsandinjectiondrugusers,andcanbetransmittedfrommotherstoinfants.

  • 标签: 异性恋 HIV 传染病 爱滋病 病毒感染 中国
  • 简介:Thepurposeofthisstudyistodistinguishrespiratorysyncytialvirus(RSV)infectionandimmunologybetweenimmunocompetentandimmunocompromisedmurineandtoexploreimmunemechanismofRSVinfection.AtvarioustimepointsafterRSVinfectionofBALB/cmiceandnudemice,pulmonaryviraltiterswereassayed,RSVantigenwastestedbydirectimmune-fluorescentassayandimmunohistochemistry.PulmonarymRNAexpressionsofTolllikereceptor(TLR)2andTLR4wereassayedbyRT-PCR.CD4+cellsandCD8+cellsinperipheralbloodwereexaminedbyflowcytometryandplasmatotalIgEwasassayedbyELISA.Leukocytesinbronchoalveolarlavagefluid(BALF)andpulmonaryhistologywereidentifiedtoreflectairwayinflammation.ItwasfoundthatRSVtitersofbothmicepeakedonthe3rddaypostinfectionwithamuchhigherlevelofviraltiterinnudemicethaninBALB/cmiceandalongerviraldurationinnudemice(over9dayspostinfection)thaninBALB/cmice(6dayspostinfection).RSVinfectioninducedhigherviralantigenexpressioninnudemice(0.267±0.045)thaninBALB/cmice(0.168±0.031).RSVinfectionenhancedpulmonaryTLR4expressionofBALB/cmice(51.96%±11.34%)andnudemice(48.96%±12.35%)comparedwitheachcontrol(34.04%±10.06%and32.37%±9.87%respectively).CD4+peripheralbloodcellsincreasedinRSVinfectedBALB/cmice(66.51%±2.09%)comparedwiththecontrolBALB/cmice(51.63%±5.90%),andCD4+cellsandCD8+cellsweredeficientinnudemice.RSVinfectionincreasedplasmatotalIgEinbothmice,andBALB/cmicehadalargeramountofIgEonthe7thdaypostinfection(9.02ng/ml±2.90ng/ml)andonthe14thdaypostinfection(12.76ng/ml±4.15ng/ml)thancorrespondingnudemice(3.72ng/ml±1.06ng/mland7.62ng/ml±3.08ng/mlrespectivelyonthe7thand14thdaypostinfection).RSVinfectednudemicehadmoresevereairwayinflammationthaninfectedBALB/cmice.ItisconcludedthatBALB/cmiceandnudemicepresentedsimilarRSVinfectiouscharacteristics.However,

  • 标签: 呼吸合胞体病毒 免疫活性 老鼠 动物实验
  • 简介:Objective:Infectionofhumanpapillomavirusincondylomaacuminatum(CA)wasdetectedbyrealtimefluorescencequantitativePCR(FQ-PCR)technique.Methods:SpecimensofCA-DNAquantificationfrom94caseswereexaminedbyrealtimeFQ-PCRtechniqueand32caseswerecomparedwiththesamemethodafter10-daystreatment.Results:CA-DNAwasfoundinallpatients,withanaverageof4.0×10^6copies/ul.After10daysoftreatment,theaveragewas2.1×10^5copies/ul.TherewasasignificantdifferenceintheaverageamountofCA-DNAbeforeandafterthetreatment.Conclusion:RealtimeFQ-PCRisagoodmethodforexaminingCA-DNAamountanditcandirectthetreatmentofCA.

  • 标签: 尖锐湿疣 CA 发病机理 性传播疾病 STD 人乳头状瘤病毒
  • 简介:Objective:Toexploretheriskfactorsofnosocomialinfectioninseverecraniocerebraltraumaandthewayofprevention.Methods:Theclinicaldataof387patientswithseverecraniocerebraltraumawerereviewed.Results:Thetotalnosocomialinfectionrateofthisstudywas22.99%.Pulmonarynosocomialinfectionpresentedmostfrequently.TheG-bacilliwerethemostcommoninfectiousbacteria.Themortalityrateoftheinfectiongroupwas38.20%.Conclusions:Complicationsofnosocomialinfectionaffecttheprognosisofcraniocerebraltraumapatients.Nosocomialinfectionisrelatedtotheageofthepatients,craniocerebraltraumaseverity,unreasonableutilizationofantibioticsandinvasiveoperations,suchastrachealcannula,mechanicalventilation,urethralcatheterizationanddeepvenouscatheterization.Patientswithseverecraniocerebraltraumashouldbecarefullytreatedandnursedtoavoidnosocomialinfection.Inordertoreducetherateofnosocomialinfection,intensivemeasurementshouldbeadopted.

  • 标签: 重度颅脑损伤 医院内感染 风险因子 交叉感染
  • 简介:Internationalarmscontrolanddisarmamenthasrecordedremarkableachieve-mentsinrecentyearsinthewakeofrapproachmentamongmajorpowersandoveralldetenteintheworldatlarge.Theseremarkableachievements,intheirturn,havepropelledtheglobalsituationfurtherinthedirectionfavorabletofurtherrelaxationofglobaltension.Thesemutuallyreinforcingandsupplementarytrends,

  • 标签:
  • 简介:THECERVIXMULTI-VIRUSESINFECTIONANDTHEDEVELOPMENTOFCERVICALCARCINOMASZhangWei张伟;JinSnunqian金顺钱;LiuBoqi刘伯齐;LiansXiao梁肖;MingLihu...

  • 标签: Human PAPILLOMA VIRUS (HPV) CERVICAL CARCINOMAS
  • 简介:Objective:Tointroducethecurrentstatusofimplementingsexuallytransmittedinfection(STIs)syndromicmanagementinChina.Methods:Datawerecollectedandanalyzedfromtheliterature.Possiblesolutionsweresuggestedfortheobstaclesencounteredintheimplementationprocess.Results:Validationofrevisedflowchartsforthemanagementofthreesyndromes(urethritis,vaginaldischarge,andgenitalulcers)hasbeenconductedinChina.Thefeasibility,effectivenessandacceptanceofusingasyndromicSTIapproachwereinvestigatedinalargestudyinHainan,ZhejiangandHubeiProvinces.Chiefobstaclestoimplementationincludedthefollowing:lackofsupportfromgovernmentauthorities;negativereactionbyhospitals;lackofcriticalthinkingandinnovation;perceivedover-emphasisontreatmentattheexpenseofprevention;andlackofcoverageforseveralimportantpathogenswithintreatmentalgorithms.Possiblesolutionsmayincludepolicyadvocacy,adoptingsyndromicmanagementintoaChinesecontext,disseminationandpromotion,trainingofproviders,encouraginguseofsyndromicapproach,andconductingoperationalresearch.Conclusions:SyndromicSTImanagementprovidesafeasibleapproachforthediagnosisandtreatmentofSTIsinChina.Furthereffortsshouldbemadeforscalingupitsapplicationinclinicalsettings.

  • 标签: 性传播感染 STIS 综合病症 临床表现 尿道炎 生殖器溃疡
  • 简介:Objectives:ToevaluatetheVidasChlamydia(CHL)assayfordetectingC.Trachomatiswithswabsandfirstcatchurine(FCU)specimensfromSTDpatientsandhighriskpopulations.Methods:Atotalof383patientsweretestedwithtissueculture(TC),VidasCHLandpolymerasechainreaction(PCR)forC.trachomatisonmaleandfemaleswabs,withVidasCHLtestingmaleFCUspecimens.CHLpositiveandequivocalresultswereconfirmedwithablockingassay(CHB).TruepositiveweredefinedaseitherTCpositive,orTCnegtivebutCHLandPCRpositive.TheperformanceofTC,CHLandPCRwereevaluatedaccordingtothisexpandedgoldstandard.Results:Comparedwiththeexpandedgoldstandard,54ofthe232malespecimensweretruepositiveresults.Formaleswabs,TC,CHLandPCRhadsensitivitiesof90.7%,96.3%and94.4%,andspecificitiesof100%,98.3%and97.2%,respectively.Differenceswerenotstatisticallysignificant.FormaleFCUspecimens,CHLsensitivityandspecificitywere83.3%and98.3%;therewaslittledifferencebetweentheseresultsandthatofmatchedswabs.Comparedwiththeexpandedgoldstandard,28ofthe151femaleswabsweretruepositive;TC,CHLandPCRhadsensitivitiesof82.1%,100%and96.4%,andspecificitiesof100%,98.4%and97.6%,respectively.Thedifferencewasalsonotsignificant.Conclusions:VidasCHLassayisverysensitiveandspecificforC.trachomatisdetectionwithswabspecimensofmaleandfemaleSTDpatients.FormaleFCUspecimens,theassayalsohadhighsensitivityandspecificity.CHBmaynotbeneededintheroutinedetectionofChlamydiainfections.PopulationswithhigherincidenceofC.trachomatisinfection.

  • 标签: 沙眼衣原体 泌尿生殖器感染 CHL 尿样检测 FCU 性传播疾病