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128 个结果
  • 简介:Thisletterreportsastudyofahybridburstassemblyandahybridburstlossrecoveryscheme(delay-basedburstassemblyandhybridlossrecovery(DBAHLR))whichselectivelyemploysproactiveorreactivelossrecoverytechniquesdependingontheclassificationoftrafficintoshorttermandlongterm,respectively.TrafficpredictionandsegregationofopticalburstswitchingnetworkflowsintothelongtermandshorttermareconductedbasedonpredictedlinkholdingtimesusingthehiddenMarkovmodel(HMM).ThehybridburstassemblyimplementedinDBAHLRusesaconsecutiveaverage-basedburstassemblytohandlejitterreductionnecessaryinreal-timeapplications,withvariationsinburstsizesduetothenon-monotonicnatureoftheaveragedelayhandledbyadditionalburstlengththresholding.ThisdynamichybridapproachbasedonHMMpredictionprovidesoverallalowerblockingprobabilityanddelayandmorethroughputwhencomparedwithforwardsegmentredundancymechanismorpurelyHMMprediction-basedadaptiveburstsizingandwavelengthallocation(HMM-TP).

  • 标签: 混合方法 恢复机制 网络丢包 OBS HMM模型 隐马尔可夫模型
  • 简介:AbstractEnhanced recovery after cesarean (ERAC) delivery is an evidence-based, multi-disciplinary approach throughout pre-, intra-, post-operative period. The ultimate goal of ERAC is to enhance recovery and improve the maternal and neonatal outcomes. This review highlights the role of anesthesiologist in ERAC protocols. This review provided a general introduction of ERAC including the purposes and the essential elements of ERAC protocols. The tool used for evaluating the quality of ERAC (ObsQoR-11) was discussed. The role of anesthesiologist in ERAC should cover the areas including management of peri-operative hypotension, prevention and treatment of intra- and post-operative nausea and vomiting, prevention of hypothermia and multi-modal peri-operative pain management, and active pre-operative management of unplanned conversion of labor analgesia to cesarean delivery anesthesia. Although some concerns still remain, ERAC implementation should not be delayed. Regular assessment and process improvement should be imbedded into the protocol. Further high-quality studies are warranted to demonstrate the effectiveness and efficacy of the ERAC protocol.

  • 标签: Cesarean delivery Cesarean section Enhanced recovery after surgery
  • 简介:Noroviruses(NoVs)arewidespreadcausesofnonbacterialgastroenteritis.OutbreaksofNoVscauseddiseasesarecommonlyascribedtotheconsumptionofcontaminatedshellfish.TheconcentrationandRNAextractionofNoVsarecrucialstepsofdetectingNoVsinshellfish.Thisstudyaimedtoselectasimple,rapidandhighlyefficientrecoverymethodofNoVsdetectionwithreal-timeRT-PCR.FourmethodsofrecoveringGI.3andGII.4NoVsfromspikeddigestivetissuesofoystersandclams,respectively,werecompared,ofthem,themethodinvolvingproteinaseKandPEG8000wasfoundthemostefficient.Withthismethod,9.3%and13.1%ofGI.3andGII.4NoVswererecoveredfromoystersand9.6%and12.3%ofGI.3andGII.4NoVswererecoveredfromclams,respectively.ThismethodwasfurtherusedtodetectNoVsin84oysters(Crassostreagigas)and86clams(Ruditapesphilippinarum)collectedfrom10coastalcitiesinChinafromJan.2011toFeb.2012.TheNoVsisolationrateswere10.47%ofclams(9/86)and7.14%ofoysters(6/84).AllthedetectedNoVsbelongedtogenotypeGII.TheNoVsrecoverymethodselectedisefficientforNoVsdetectioninoystersandclams.

  • 标签: 诺沃克病毒 牡蛎 RT-PCR检测 蛤蜊 恢复方法 RNA提取
  • 简介:大约90?没有全面利用,%稀土元素矿物质和许多另外的珍贵矿物质作为铁跟踪是heaped。为了包括地恢复这些珍贵矿物质,在Baotou钢跟踪和嵌入的特征的珍贵矿石类型的一个看法,珍贵部件流动和他们在beneficiation程序表联合关系的各自的恢复被分析;能把考虑给四种部件的进程流动和参数是坚定的。TFe,稀土元素氧化物(REO),铌和荧石恢复能到达72.70%,81.84%,78.58%并且60.18?在low-intensity/high-intensity的%磁性的分离分别地。高紧张的磁性的集中被REO直接筹款对待;恢复是75.43?%,在Fe能与Nb完全被分开的底上。underflow被减小roasting-low-intensity对待磁性的分离。并且在这些珍贵部件的恢复之间的关系也被讨论。

  • 标签: 耦合关系 回收率 稀土尾矿 多组分 选矿工艺流程 稀土矿物
  • 简介:Aderivativepatchinterpolatingrecoverytechniqueisanalyzedforthefiniteelementapproximationtothesecondorderellipticboundaryvalueproblemsintwodimensionalcase.Itisshownthattheconvergencerateoftherecoveredgradientadmitssuperconvergenceontherecoveredsubdomain,andistwoorderhigherthantheoptimalglobalconvergencerate(ultracovergence)ataninternalnodepointwhenevenorderfiniteelementspacesandlocaluniformmeshesareused.

  • 标签: 有限元逼近 超收敛性 偏微分方程 LAGRANGE插值
  • 简介:Streamprocessingapplicationscontinuouslyprocesslargeamountsofonlinestreamingdatainrealtimeornearrealtime.Theyhavestrictlatencyconstraints.However,thecontinuousprocessingmakesthemvulnerabletoanyfailures,andtherecoveriesmayslowdowntheentireprocessingpipelineandbreaklatencyconstraints.Theupstreambackupschemeisoneofthemostwidelyappliedfault-tolerantschemesforstreamprocessingsystems.Itintroducescomplexbackupdependenciestotasks,whichincreasesthedifficultyofcontrollingrecoverylatencies.Moreover,whendependenttasksarelocatedonthesameprocessor,theyfailatthesametimeinprocessor-levelfailures,bringingextrarecoverylatenciesthatincreasetheimpactsoffailures.Thispaperstudiestherelationshipbetweenthetaskallocationandtherecoverylatencyofastreamprocessingapplication.Wepresentacorrelatedfailureeffectmodeltodescribetherecoverylatencyofastreamtopologyinprocessor-levelfailuresunderataskallocationplan.Weintroducearecovery-latencyawaretaskallocationproblem(RTAP)thatseekstaskallocationplansforstreamtopologiesthatwillachieveguaranteedrecoverylatencies.WediscussthedifferencebetweenRTAPandclassictaskallocationproblemsandpresentaheuristicalgorithmwithacomputationalcomplexityofO(nlog2n)tosolvetheproblem.Extensiveexperimentswereconductedtoverifythecorrectnessandeffectivenessofourapproach.Itimprovestheresourceusageby15%-20%onaverage.

  • 标签: stream processing task ALLOCATION FAULT-TOLERANCE UPSTREAM
  • 简介:Tostudythechangesofexcitatoryaminoacids(EAAs)andintracellularcalcium([Ca2+]i),andtheprotectiveeffectofEAAsreceptorantagonistsinthetissuesofrabbitlumbarspinalcordafter40-minuesischemiaand4-hoursreperfusion.Methods:Thirtyhealthyrabbitsweredividedintosixgroups:sham-operation,40-minuesischemia,4-hourreperfusion,ketamineandMgSO4treatment,ketaminetreatment,andsalinetreatmentgroups.ThecontentsofEAAs(glutamateandaspartate)and[Ca2+]iweremeasured.Results:Thecontentsofglutamateandaspartateweredecreasedto15.18μmol/g±2.33μmol/gand9.99μmol/g±0.69μmol/g,respectively;13.75μmol/g±2.58μmol/gand6.49μmol/g±1.39umol/gafterreperfusion.Intheischemiagroup,the[Ca2+]iwaselevatedto221.2μg/g±4.27μg/g,andelevatedfurtherto298.3μg/g±9.26μg/gafterreperfusion,beingsignificantlyhigherthanthatofischemiaandcontrolgroups.Ketaminecouldobviouslyincreasethelevelofglutamateandaspartateanddecreasethelevelof[Ca2+]iduringtheischemiaandreperfusioninjury.Conclusions:TheexcitotoxicityofEAAsandtheoverloadofcalciuminducedbyEAAsplayaharmfulroleinischemiaandreperfusioninjury.Ketaminehasaneffectiveinhibitoryeffect.

  • 标签: 脊索损伤 功能恢复 脊索缺血 再灌注损伤 兴奋性氨基酸
  • 简介:Asignalwaveformrecoverymethodbasedonthecoprimearrayisinvestigatedtoextractthewaveformofthedesiredsignalfromspatialinterferencesinnarrowbandscenarios.Thedirectionofarrivals(DOAs)ofthedesiredsignalandinterferencesignalsareestimatedwiththecompressivesensingapproachbasedonanglegrids,andthesignalpowertogetherwiththenoisepowerareestimated.Thereafter,amodifiedsteepestdescent(SD)methodisderivedtorecoverthewaveformofthedesiredsignalandinterferencesutilizingtheestimatedpoweranddirections.Therecoveredwaveformofthedesiredsignalistheoutputoftheproposedmethod.Thesituationinwhichthesignalsarenotonthepredefinedanglegridsisalsoconsidered.TheDOAsestimatedpredefinedanglegridsisalsoconsidered.TheDOAsestimatedlikelihood(ML)angleestimation.Comparedtotheexistingbeamformingmethodsonco-primearray,theproposedmethodcanobtainthewaveformofthedesiredsignal.Simulationresultsdemonstratethattheproposedmethodcanachievegoodperformanceinsignalwaveformrecoveryandoutputsignaltonoiseratio.

  • 标签: co-prime ARRAY SIGNAL WAVEFORM recovery compressive
  • 简介:Thisexperimentusedwhole-cellpatch-clamptechniquetoinvestigatethecourseofrecoveryfromuse-dependentblockofNa+channels(Nav1.5)inhumanembryonickidney(HEK)cells,onwhichtoverifytheeffectsofvolatileoilofNardostachychinesisBatal(Gansong).MethodsTwopulsesgeneratedbycomputerfollowedbyarecoverypulseandatestpulse,theintervaldurationbetweenthetwopulsesvariedfrom16msto1s,andholdingpotentialis-80mVto-140mV.ThepeakNa+currentforagivenrecoverytimewasnormalizedtothefullyrecoveredpeakcurrent,andthenormalizedvaluewastheplotasafunctionoftherecoverytimetostudytheeffectsof3ppmconcentrationGansongvolatileoilonrecoveryfromuse-dependentblockofNav1.5inHEK.ResultsItshowedthatGansonggroup,comparingwithcontrolgroup,delayedthetimecoursesofrecoveryfromuse-dependentblock[(33.2±5.77)msforcontrolgroupand(52.5±6.08)msfor3ppmGansonggroup,P<0.05].InthepresenceofGansong,inhibitionoftheNa+currentwasenhancedbyincreasingfrequencyofdepolarizingpulsefrom56.5msto16ms.Inthecontrolgroup,thetimecourseofrecoveryshowedthatrecoverystartedat19.5msandfinishedby36.5ms.InthepresenceofGansong,thetimecourseofrecoveryshowedthatrecoverystartedat36.5msandfinishedby56.5ms.Na+currentsrecoveredfromtheuse-dependentblockvaryingwithholdingpotential(holdingpotential-dependent).ConclusionsTheresultssuggestedthatNa+currentsrecoveredfromtheuse-dependentblockcorrelatedwithpersistenttime,holdingpotential.TheGansongvolatileoilhasinhibitiveeffectontheNa+currentrecovery.

  • 标签: 胚胎肾细胞 临床观察 膜片钳 使用依赖性阻滞 涧挥发油
  • 简介:TheJointControlsProject(JCOP)isacollaborationbetweenCERNandthefourLHCexperimentstofindandimplementcommonsolutionsfortheircontrolandmonitoringsystems.AspartofthisprojectandArchitectureWorkingGroupwassetupinordertostudytherequirementsanddeviseanarchitecturalmodelthatwouldsuitthefourexperiments.Manyissueswerestudiedbythisworkinggroup:Alarmhandling,AccessControl,HierarchicalControl,etc.Thispaperwillreportonthespecificissueofhierarchicalcontrolandinparticularpartitioning,automationanderrorrecovery.

  • 标签: 软件开发 LHC实验 控制 检测
  • 简介:Eco赔偿是为外部费用的成为主观的一台环境经济仪器。把农田还给湖是在中国的长江山谷恢复沼泽地生态系统功能的重要部分之一。湖恢复的工程是否能是成功的,取决于赔偿到失去了他们的原来的好处并且由把农田还给湖贡献了沼泽地生态系统恢复的农民。瞄准东廷·莱克,的沼泽地恢复在这个区域的湖恢复和洪水控制的节目的实际实现被人口再定居的繁重的任务质问了,因此到达作为上面建议的学术目的,是为案例研究的一个理想的区域。基于领域调查和试验,这研究评估了重新安居的农民的利益损失,生态系统服务功能的增加的值由沼泽地恢复引起了,并且而且,为重定位的农民的eco赔偿的值由考虑农民赔偿呼吁的联合是计算的。为在东廷·莱克区域的重定位的农民的eco赔偿的值每由沼泽地生态系统恢复上的效果的合成分析的家庭是6084.5元。而且,这篇文章作为一个盒子拿了东廷·莱克区域由把农田还给湖学习并且探索eco赔偿的基本问题,那是谁应该付钱,谁应该被付,支付是多少并且什么支付工具是,它寻求了沼泽地恢复eco赔偿的机制并且为生态的恢复推动了人们热情。

  • 标签: 生态恢复 洞庭湖区 补偿效应 湿地
  • 简介:Thestudyofneuronalplasticityunderpathologicalconditionsisnowamajorpointoffocusonthefieldofneurologicalrecovery.Aftertherepeatedfailureofacuteneuroprotectionstrategiesforstroketreatment,thedesignofstudiesaimedatpromotingthereconstructionofneuronalnetworkshasbecomeessential.Methodsforthedeliveryoftherapeuticagentsonasteadydosage,thuspreventingpharmacologicalpeaksorexcessivemanipulationofexperimentalanimals,arethusrequired.Additionally,methodsthatallowthevisualizationofneurologicalremodelingprocessesarefundamentaltotheunderstandingofhowatherapeuticagentexertsitsfunction.Herewedescribehowtheuseofminiosmoticpumpsforthesteadydeliveryofsuchagents,togetherwithtracttracerinjections,canbecombinedtounveilimportantinformationonhowthebrainchangesafterstrokeandhowtherapeuticagentspromotebrainremodelingrecovery.

  • 标签: 神经元 可塑性 连通性分析 神经康复 大脑 治疗药物
  • 简介:Amodifiedpolynomialpreservinggradientrecoverytechniqueisproposed.Unlikethepolynomialpreservinggradientrecoverytechnique,thegradientrecoveredwiththemodifiedpolynomialpreservingrecovery(MPPR)isconstructedelement-wise,anditisdiscontinuousacrosstheinterioredges.OneadvantageoftheMPPRtechniqueisthattheimplementationiseasierwhenadaptivemeshesareinvolved.SuperconvergenceresultsofthegradientrecoveredwithMPPRareprovedforfiniteelementmethodsforellipticboundaryproblemsandeigenvalueproblemsunderadaptivemeshes.TheMPPRisappliedtoadaptivefiniteelementmethodstoconstructasymptoticexactaposteriorierrorestimates.Numericaltestsareprovidedtoexaminethetheoreticalresultsandtheeffectivenessoftheadaptivefiniteelementalgorithms.

  • 标签: 后验误差估计 回收技术 多项式 应用 自适应有限元方法 自适应网格
  • 简介:Thispaperintroducesanimprovednewmethodwhichisusedtorecoversilverassilvernitratebyionexchangefromthewasters.Inthismethod,wecanrecoversilvernitrate,onlybyusingakindofionexchangeresinandtwoionexchangeprocesses.Itcanreplacetheoriginalrecoverymethodinwhichtwokindsofionexchangeresinsandthreeionexchangeprocessesareneeded.Theresultissatisfied

  • 标签: AGNO3 回收 离子交换法 废料
  • 简介:Thetraditionalsuper-resolutiondirectionfindingmethodsbasedonsparserecoveryneedtodividetheestimationspaceintoseveraldiscreteanglegrids,whichwillbringthefinalresultsomeerror.Tothisproblem,anovelmethodforwidebandsignalsbysparserecoveryinthefrequencydomainisproposed.Theoptimizationfunctionsarefoundandsolvedbythereceiveddataateveryfrequency,onthisbasis,thesparsesupportsetisobtained,thenthedirectionofarrival(DOA)isacquiredbyintegratingtheinformationofallfrequencybins,andtheinitialsignalcanalsoberecovered.Thismethodavoidstheerrorcausedbysparserecoverymethodsbasedongriddivision,andthedegreeoffreedomisalsoexpandedbyarraytransformation,especiallyithasapreferableperformanceunderthecircumstancesofasmallnumberofsnapshotsandalowsignaltonoiseratio(SNR).

  • 标签: SUPER-RESOLUTION direction of ARRIVAL SPARSE recovery
  • 简介:Theleachingbehaviorofmetalsfromapressure-leachingslagwasinvestigatedusingadesulphurization-leaching-hydrolysisprocessfortherecoveryofbismuthandantimony.Variousparameterswerestudied,includingtheamountofacidadded,temperature,time,additionofNaClandsolid-liquidratiointheleachingprocess.Theexperimentalresultsshowthatthecontentsofbismuthandantimonyaremostlyenrichedintheprocessofkerosenedesulphurization.Morethan98%Sband96%Biareextractedunderthedeterminedconditions.Intheprocessofhydrolysis,theprecipitationratesofbismuthandantimonyare97.80%and94.59%,respectively.Undertheoptimumexperimentalconditions,therecoveryrateofbismuthandantimonycanbeupto95.80%and90.80%,respeoively.

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