简介:基于的一个格子和Green-Ampt(Grid-GA)散布了hydrologic物理模型为洪水模拟被开发并且在半潮湿、半干旱的盆预报。基于从数字举起模型(DEM)和Green-Ampt渗入方法提取的每个格子房间的地形学的信息,Grid-GA模型考虑水内容的再分配,并且由植被和根拦截组成,土壤水分蒸发蒸腾损失总量,经由过量渗入机制的流量产生,流量集中,并且流动路由。土壤潮湿的下坡的再分配明确地在一个格子基础上被计算,并且沿着网络被考虑的河排水在流量路由以内在格子之中浇交换。建议模型和Xinanjiang模型在Luohe河里被用于上面的Lushi盆,黄河的一条支流,与为洪水模拟的4716km2的一个区域。结果证明两个模型在洪水模拟表演很好并且能被用于洪水在半潮湿、半干旱的区域预报。
简介:Themainresultsofthispaperarestatedasfollows.LetRbeanorderringinthesemi-primaryringQ.SupposethatRsatisfiesthemaximalconditionfornilrightidealsofR,Thenwehave(i)ifanidealIofRhasafinitelengthasrightR-module,thenIalsohasafinitelengthasleftR-module;(ii)denotebyA(R)theArtinianradicalofR,andNthenilradicalofR,thenA(R)+N/N=A(R/N),ifRsatisfiesthecommutativecondi-tiononthezeroproductofprimeidealsofB.
简介:Asemi-structureddocumenthasmorestructuredinformationcomparedtoanordinarydocument,andtherelationamongsemi-structureddocumentscanbefullyutilized.Inordertotakeadvantageofthestructureandlinkinformationinasemi-structureddocumentforbettermining,astructuredlinkvectormodel(SLVM)ispresentedinthispaper,whereavectorrepresentsadocument,andvectors'elementsaredeterminedbyterms,documentstructureandneighboringdocuments.TextminingbasedonSLVMisdescribedintheprocedureofK-meansforbriefnessandclarity:calculatingdocumentsimilarityandcalculatingclustercenter.TheclusteringbasedonSLVMperformssignificantlybetterthanthatbasedonaconventionalvectorspacemodelintheexperiments,anditsFvalueincreasesfrom0.65-0.73to0.82-0.86.
简介:ThemethodsforprotectingInPsurfaceagainstdegradationduringannealing,includingencapsulantandencpsulant-freetechniques;rapidthermalan-nealingofInPimplantedlayers;implantedionspeciesandsomeprofilesoftypicaldopants,etc.,theyareallthekeytechniquesconcerningionimplantationintose-mi-insulatingInP,andhavebeenreviewedsyntheticallyaswell.
简介:Weathermodelsareessentialtoolsforcheckingoftheeffectoftheweatherelementsintermsoftheireffectontheproductionofthecrop.Thisresearchisanattempttoseetheeffectofonlytwovariablesi.e.,temperatureandrainfallforthedivisionFaisalabad(semitropicalregionofPakistan).Themodelfittedisofthelinearform:thevaluesofa,b,chavebeenfound.Theexpectedyieldhasbeencalculatedbyusingthearidityindices(X1andX2)andtheresultintheformofcoefficientofdeterminationR2hasbeenfoundequalto0.166.Thesignificanceoftheregressioncoefficienthasbeentested,whichshowsthatthecontributiontotheyieldfromaridityindexatgerminationandthatatripeningissignificant.Thewheatyieldsaretheresultsofawidevarietyofvariables,mostofwhichshowvaryingdegreeofrelationshipwithoneanother,somepositiveandsomenegativeintermsofoutput.Thesevariablesmaybetechnology,fertilizers,pesticides,epidemics,kindsofseedsused,market
简介:精确水动力学计算为半能沉入水中是批评的支持海洋资源的现代快速的探索和抽取。以便加速水动力学计算,线建模结构被分开成结构的部分然后适合到不一致的合理B花键(NURBS)。这样,鞠躬和严厉的节线被产生。部分的交叉当模特儿然后与通用建模工具MSC.Patran被做。网孔是模型上的gererated以便在关节上获得交叉的点,然后这些点被适合到NURBS。下次,补丁表示方法被采用产生弄湿的表面和内部免费表面的网孔。表面上的速度潜力独立是计算的,在不规则的频率效果在水动力学系数的计算被处理的基础上。最后,运动反应半能沉入水中被计算,并且以便改进垂直运动的计算,一个抑制术语在垂直方向被加。结果证明上述方法能产生精确地代表弄湿的表面的好网孔一半能沉入水中并且因此改进水动力学计算的精确性。
简介:Fortheglobalandstructuralfatiguestrengthanalysisofasemi-submersibleplatform,waveloadsunderdesigncon-ditionsarecalculatedbyuseofthethree-dimensionalboundarydementmethod.Methodsforcalculatingtheforward-speedfree-surfaceGreenfunctionarediscussedandacomputerprogramwiththisGreenfunctionisdeveloped.Accordingtothespecialrules,thewaveloadsunderseveraltypicaldesignconditionsoftheplatformarecalculated.Themaximumverticalbendingmoment,torsionmomentandhorizontalsplitforcearedeterminedfromaseriesofcontourmapsofwaveloadsforthewaveperiodof5to18secondsatacertainintervalandthewavephaseofO°to360°atacertaininterval.Thewaveheightisdeterminedbythefunctionofwaveperiodwithagivenexceedanceprobability.Themaximumwaveloadsunderthecombinationofwaveparametersareusedastheinputofhydrodynamicpressureinthethree-dimensionalfiniteelementanalysisprocess.Thetransferfunctionsofwaveloadsontheplatformareusedforthefatiguestrengthanal-ysisoftheK-tubularjointandthesub-modelofthestructure.
简介:Thebreakdownandfoundationofgeostrophicbalanceisoneoftheimportantmovementsinthemid-andhigh-latitudeatmosphereandoceans.Inthetropicalarea,thevalueofCoriolispa-rameterissosmallthatitisdifficulttosatisfythebi-geostrophicequilibriumbetweenthepressureandvelocityfields.However,inthetropicalarea,thezonalvelocityofsomemotionsintheatmo-sphereandoceansislarge,sotheCoriolisforceisnotsmall,geostrophicbalancecanexistinzonaldirection,i.e.semi-geostrophicbalance.Furthermore,inthedominantareaofHadleycirculationintheatmosphereortheareaneartheoceanmeridionalboundary,themeridionalvelocityislarge,sogeostrophicbalancecanalsoexistinmeridionaldirection.Inthispaper,theprocessofthedis-persionofinertialgravitywaveandthefoundationofsemi-geostrophicbalancearefirstdiscussed.Second,theadjustmentprocessbetweenthevelocityandpressurefieldsafteradaptationisalsoviewed,andthescalecriterionofthesemi-geostrophicadaptationisdiscussed,i.e.forthemotionwithmeridionalscalegreaterthantheequatorialRossbyradiusofdeformation,thevelocityandpressurefieldsafteradaptationchangetofittheinitialpressurefield;onthecontrary,thefieldschangetofittheinitialzonalvelocityfield,andthestrengthofthefieldsafteradaptationdependsonthezonalscale.
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简介:Thispapersetupaclassofnonlinearsemi-discreteage-structuredmodelofpopulationevolutionsystem,byusingtheconceptofcriticalproliferationrate,itdiscussedthestabilityoflinearandnonlinearpopulationsystem,anditobtainthesufficiencyconditionsofthestablefornonlinearsemi-discretesystem.
简介:Wepresentasemi-customdesignmethodologybasedontransistortuningtooptimizethedesignperformance.Comparedwithothertransistortuningapproaches,ourtuningprocesstakesthecross-talkeffectintoaccountandprominentlyreducesthecomplexityforcircuitsimulationandanalysisbydecomposingthecircuitnetworkutilizinggraphtheory.Furthermore,theincrementalplacementandroutingforthecorrespondingtransistortuninginconventionalapproachesisnotrequiredinourmethodology,whichmightinducetiminggraphvariationandadditionaliterationsfordesignconvergence.Thismethodologycombinestheflexibleautomatedcircuittuningandphysicaldesigntoolstoprovidemoreopportunitiesfordesignoptimizationthroughoutthedesigncycle.
简介:—Thepresentstudyinvestigatestheinteractionofsteepwaveswithsemi-circularbreakwaterwiththecomplexplane'sCauchyboundaryintegraltheorem.Theboundaryintegralmethodisusedtotransformthecalculationinfluiddomainintoitsboundaryalone.Inthecalculationthecomputationdo-mainismovedwiththepropagationofwaves.AnumericalsolutionisobtainedforincidentStokeswavespassingthesubmergedobstacles.Thismethodhasbeenextendedtothecalculationofwaverun-uponaslopeforestimatingwaveovertopping.
简介:Forasemi-supervisedclassificationsystem,withtheincreaseofthetrainingsamplesnumber,thesystemneedstobecontinuallyupdated.Asthesizeofsamplessetisincreasing,manyunreliablesampleswillalsobeincreased.Inthispaper,weusefuzzyc-means(FCM)clusteringtotakeoutsomesamplesthatareuseless,andextracttheintersectionbetweentheoriginaltrainingsetandtheclusterafterusingFCMclustering.Theintersectionbetweeneveryclassandclusterisreliablesampleswhichwearelookingfor.Theexperimentresultdemonstratesthatthesuperiorityoftheproposedalgorithmisremarkable.
简介:Inthispaper,wehavesuggestedseveralinterpolatingformulaewhichareconvinientforvectorcom-puterstoperformvectorcalculation.Analysisshowsthatforasimpleadvectiveproblem,thesemi-Lagrangianschemesconstructedwiththeseformulaearelinearlyunconditionallystable.Moreover,wehavediscussedthenonlinearcomputationalchaosinthesemi-Lagrangianschemes.Itisfoundthatforasimplenonlinearadvectiveproblem,wecanintroducephysicallyunrealanddirectinteractionofthreeormorewaves.Nu-mericaltestsindicatethatthisphenomenonhascertaininfluenceonthesimulatedresultsoftwo-dimensionalBenardconvection.