简介：Floodingandanaerobicstressisoneofthestressfactorsaffectingmangroves.Mangrovespecies,differingconsiderablyintheirsusceptibilitytothestress,aredistributedindifferenttidalelevationzones.Growinginregularseawaterdippingandanoxicmud,mangroveshavedevelopedasetofadaptationmechanismsoffloodingandanaerobicstress.Thispaperemphaticallyreviewedfourphysiologicalresponsesofmangrovestofloodingandanaerobicstress,i.e.nutritionallocation,photosynthesisandrespiration,carbonandnitrogenmetabolismandantioxidantmechanism.Finally,itwasproposedthatstudiesshouldbefurtherfocusedonthepathofrootsmetabolism,non-structurecarbohydratesandsecondarymetabolismofthemangrovesunderfloodingandanaerobiccondition.

简介：在东南亚洲的农民从移植直接弄湿或当它要求更少的劳动和时间，弄干播种正在采用大米庄稼建立方法并且比较地更少的精力与移植比。与灌溉状况相对照，在rainfed低地，直接播种是一个普通惯例。早泛滥控制杂草，但是减少在直接播种的米饭的幼苗建立。厌氧的萌芽是一个重要特点抵抗早泛滥引起的损坏。能在庄稼建立帮助并且在泛滥下面改进庄稼生长的管理选择可能移开与直接播种有关的限制。调查与二近的isogenic线Swarna和Swarna-Sub1被执行。而Swarna是易受影响的，Swarna-Sub1是容忍的浸没。种子priming用完了水和2%Jamun(Syzygiumcumini)叶摘录，和它在泛滥下面改进了幼苗建立。生长的加速由于种子预告的处理发生了，它更长结果幼苗和生物资源的更大的累积。种子priming极大地赶快在Swarna-Sub1的全部的淀粉酶和白酒脱氢酶的活动比在Swarna。当植物在泛滥下面被栽培时，Swarna-Sub1超过了Swarna。杂草生物资源在与非充满的条件相比泛滥下面显著地减少了。种子priming在在非充满、早的泛滥的条件下面两个都归因参数的产量和产量上有积极效果。

简介：SYNFlooding是最流行的DoS和DDoS攻击手段，文章分析了SYNHooding攻击原理，介绍了目前常用的检测及防御技术。

简介：联合对的热绝缘的管料绳在充满井的蒸气内垮掉，在管料在高温度和高压力蒸气被使用大约二年以后。与进一步的支票，大多数在内部、外部的管料之间的焊接关节也裂开了，这被发现。为事故的失败分析被化学作文的分析为服务环境的钢，微观结构观察，机械性质测试，和调查执行了。对的热绝缘的管料绳的早损坏被苛性的压力腐蚀主要导致的结果表演，它能被联合的不稳定的微观结构加强很长时间在高温度满足了。而且，为周期的蒸气注射的热绝缘的管子上的高pre-压力设计可能不对蒸气泛滥的状况合适，它将导致裂开的焊接关节。(编辑作者摘要)6个裁判员。

简介：Previousstudiesathomeandabroadhavemainlyfocusedonsingledam-break,andlittleattentionhasbeenpaidsofartothedam-breakofcascadereservoirs.Multi-sourceflooding,whichcanleadtothree-dimensionalturbulentphenomenaandsuperpositioneffects,isthemaindifferencebetweenthedam-breakofcascadeandsinglereservoirs.Detaileddescriptionsofthecouplednumericalsimulationofmulti-sourcefloodinghavelittlebeenreported,andtheinitialwetriverbedisrarelyconsideredincurrentmodels.Therefore,inthispaper,amethodbasedonthethree-dimensionalk_eturbulencemodelcoupledwiththevolume-of-fluidmethodisproposedtosimulatethedam-breakfloodingofcascadereservoirs.Theupstreamriver,reservoir,anddownstreamriverareconnectedbytheinternalboundarymethod,andtheinitialconditions,includingriverflowandreservoirwater,aredeterminedaccordingtotheresultsofthenumericalsimulation.Couplednumericalsimulationofdifferentdam-breakfloodingisthenachieved.Thepresentworksolvesthechallengespresentedbytheenhancementandsuperpositionofnaturalriverflow,upstreamflooding,anddownstreamflooding.Thispaperprovidesatheoreticalbasisforfuturestudiesonthedam-breakfloodroutingofcascadereservoirs.

简介：ThestudyconsistsoftheidentificationoflandformssubjecttoalluvialfanfloodinginactivesectorsoftheZondarangepiedmont.IntheDepartmentofPocito,locatedabout5kmsouthwestofSanJuanCity,aseriesofalluvialfanshavebeenidentified.Thesealluvialfansarelocateddownstreamofthenaturaldrainagebasinscoveringanareaofapproximately130km^2towardstheeasternslopesoftheZondarangeatamedianelevationof2,000ma.s.l.

简介：ThehugewinterstormofDecember23–29,2015deliveredheavyrainfallinabroadswathacrosstheUSA,delugingEast-CentralMissouri.Recordhighriverlevelsweresetatmanysites,butdamagesweremostpronouncedindevelopedfloodplainareas,particularlywherehighleveeswerebuiltorriverchannelsgreatlynarrowed.Anaverageof20cmofrainthatmostlyfellinthreedaysimpactedtheentire10300km2MeramecBasin.Comparedtothepriorrecordfloodof1982,thehighestrelativestage(+1.3m)onMeramecRiveroccurredatValleyParkproximalto(1)anewlevee,(2)alandfillinthefloodway,(3)largefloodplainconstructionfills,and(4)tributarycreekbasinsimpactedbysuburbansprawl.Eventhoughonlyasmallfractionofthe1.8millionkm2MississippiRiverwatershedaboveSt.Louisreceivedextraordinaryrainfallduringthisevent,thehugechannelizedrivernearandbelowSt.Louisrapidlyrosetosetthe3rd-highesttothehigheststagesever,exhibitingtheflashyresponsetypicalofamuchsmallerriver.

简介：Asthepaceofurbanizationisaccelerating,increasingamountoffloodplainhasbeenprojectedasthefuturecities.Subsequently,urbanfloodingisbeingstudiedbyglobalemergencymanagementexportsduetoitsincreasinglysignificantimpactonus.Someexistingresearchonfloodingemergencymanagementbasedonthecase-basedreasoning(CBR)methodhavemadetremendousprogress,buttheurbanfloodingcasewithitsstratifieddatacharacteristicsisrequiredanewmethodologywhichisdifferentfromtheonesappliedtoflashfloods.So,basedonthecase-basedreasoning(CBR)method,thispaperproposedaCPIE-CBRmodelwithfourlayers,classificationfiltration,punctiformsimilarity,intervalsimilarityandentropyweightmethod,tocalculatethecasesimilarityamongtheurbanfloodingcasewithstratifieddatacharacteristics.ThenwecarryoutthenumericalsimulationwiththerealdataaboutChinaandconductsomecomparisonwithoriginalwayssothatweobservethevalidityandefficiencyofourmodelintheend.

简介：Basedonthenon-Darcyflowcharacteristicsofsurfactantfloodinginthelowpermeabilityoilfield,consideringthechangesofthresholdpressureandinfluenceofsurfactantonconvection,diffusion,adsorptionandretention,amathematicalmodelisestablishedforathree-dimensional,two-phase,three-componentsurfactantflooding.Anewtreatmentforthechangesofthresholdpressureandanovelcorrectionmethodfortherelativepermeabilitycurveintheprocessofsurfactantfloodingarederived,whichenhancesthematchingdegreebetweenthemathematicalmodelandfieldpractice.ThemathematicalmodelwasusedtoperformthenumericalsimulationstudyforapilottestofsurfactantfloodinginChao45BlockofDaqingOilfield,aproperinjectionplanwasoptimized.Aftertheoptimizedplanwascarriedoutinoilfield,thedesirableeffects,likepressure-reducing,injectionrateincrease,andtheincreaseofoilrecovery,wereachieved.Theaverageoilincreaseforsinglewellreaches37%,theratioofcosttorevenueisabove1:4,sotheeconomiceffectofscaleispromising.

简介：Floodingtimingandfrequencymayhavedifferenteffectsonthegrowthandcarbonmetabolismofplantsinwetlands.WetestedthishypothesisusingthreemarshplantsinSanjiangPlain,whichweregrowingindifferentfloodingtimingandfrequencyenvironmentsfor24days.Thethreemarshplantsindifferentelevationsalongawater-levelgradient,high-elevationspeciesCalamagrostisangustifolia,mid-elevationspeciesCarexlimosaandlow-elevationspeciesCarexlasiocarpa.Ourexperimentincluded6kindsoftreatments:control,longerfloodingtiming,medialfloodingtimingandfrequency(2treatments),andhigherfloodingfrequency(2treatments).LongerfloodingtimingandhigherfloodingfrequencytreatmentsledtosimilarreductionsinbiomassaccumulationandrelativegrowthrateofCalamagrostisangustifolia,whereasgrowthofCarexlimosawasnotaffectedbyeitherfloodingtimingorfrequency.However,biomassaccumulationandrelativegrowthrateofCarexlasiocarpawasonlyreducedbythehigherfloodingfrequency.StarchandsolublesugarcontentsofCalamagrostisangustifoliawerenegativelyaffectedbyfloodingfrequency.OnCarexlimosa,higherfloodingfrequencyresultedinhigherstarchcontent,butlongerfloodingtimingledtoaccumulatedstarchcontentinCarexlasiocarpa.SolublesugarcontentsofCarexlasiocarpaandCarexlimosawerenotaffectedbyeitherfloodingtimingorfloodingfrequency.Theseresultsindicatedthatgrowthresponsesofthethreemarshplantstofloodingtimingandfrequencywascloselyrelatedtothedifferentphysiologyofcarbohydratemetabolism.

简介：Inthispaperthesolar-blindultraviolet(UV)lightisusedascommunicationmediumforwirelesssensornetworks(WSNs).ThreetypesofsinglescatteringUVcommunicationmodelsareintroducedandadirectionalfloodingmodelisproposed,whicharebasedonthedirectionalityoftheUVcommunicationandthetraditionalfloodingroutingmodel.Thedelay,delayjitter,throughputandenergyconsumptionofthethreetypesofcommunicationsofthenewmodelaresimulatedandcompared.Theresultsindicatethattheproposeddirectionalfloodingmodelcaneffectivelyavoidtheunidirectionalityandtheblindnessofthetraditionalfloodingbroadcastmessages.Theenergyconsumptionofnodesinthenetworkisreducedandthelifecycleofthenetworkisextended.