简介：Splenosisistheautotransplantationofsplenictissuethatusuallyfollowstraumaticruptureofthespleen.Splenicimplantsmaybeseededwithinorbeyondtheperitonealcavity.1Themostfrequentlocationsofsplenosisinthedescendingorderaretheserosalsurfaceofthesmallintestine,thegreateromentum,parietalperitoneum,surfaceofthelargeintestine,mesentery,undersurfaceofthediaphragmandthethorax.1,2However,intrahepaticsplenosisisveryrare.Werecentlyencounteredapatientinwhomresultsofultrasonography(US)andcomputedtomography(CT)revealedanintrahepaticmassthatconsistedofectopicsplenictissue.Toourknowledge,thisisthefifthreportofectopicsplenictissueintheliverintheEnglish-languageliterature.Wepresenttheimagingfindingsofthesplenicimplantsintheliveranddiscussthediagnosisanditspracticalsignificance.

简介：三明治板系统(SPS)被预付开始在海军的建筑学和海洋工程收到了广泛的注意的材料。根据分类社会的规则，目前，壳和稳固的元素的混合物被要求模仿SPS。基于僵硬分解的原则，为壳元素的一个新数字模拟方法被建议。根据僵硬分解的原则，全部的僵硬能被分解成弯曲僵硬并且砍僵硬。与把僵硬弄弯有关的排水量和压力反应与把压成薄片的壳元素被计算。排水量和压力反应由于砍被计算代码的使用计算由FORTRAN语言写。然后，为SPS的全部的排水量和压力反应被一起增加全部的排水量和应力的这二部分获得。最后，一个矩形的SPS盘子和双底部结构被用于模拟。在论文建议的元素模仿的偏转比一样大的结果表演根据Hoff理论由稳固的元素和分析溶液模仿了并且对壳固体元素的混合模仿的一样近似，并且在论文建议的元素模仿的压力对另外的模仿的方法近似。那么与计算相比基于壳和稳固的元素的混合物，在论文给的数字模拟方法对更有效、更容易。

简介：在供应链操作系统有许多造成分裂的事故；完成供应链的协作是为供应链研究的主要目的。当造成分裂的事故逐渐地影响了供应链的协调操作时，供应链协作上的存在研究文学在静止环境正在设定。造成分裂的事故怎么影响协调供应链的答案在这篇论文被给。基于供应锁住被否定刺激机制协调的基准，我们由使用随机的变量的二个不同分发函数在被用来表示供应混乱的模拟途径在供应链系统上学习供应混乱的影响。在这二模拟结果之间的比较；在供应混乱下面的可能的协作机制被建议。从供应链风险管理的观点，我们为经理提供灵感。

简介：Wepresentthesimulationofthedynamicsoffluid-cylinderinteractionsinanarrowthree-dimensionalchannelfilledwithaNewtonianfluid,usingaLagrangemultiplierbasedfictitiousdomainmethodologycombinedwithafiniteelementmethodandanoperatorsplittingtechnique.Asexpected,asettlingtruncatedcylinderturnsitsbroadsideperpendiculartothemainstreamdirectionandthecenterofmassmovestothecentralaxisofthechannel.Inthecaseoftwotruncatedcylinders,theyfirstmovearoundeachotherforawhileandthenstaytogetherina"T"shape.Afterthe"T"shapehasbeenformedforalongenoughtime,wefoundnovortexsheddingbehindthecylinders.Whensimulatingthefluidizationof60truncatedcylinders,wecapturedthefeaturesofinteractionsamongfluidizedcylindersasobservedinexperiments.

简介：Thispaperpresentsanapproachwhichenablessurfacemodelling,meshgenerationandtheFiniteElement(FE)analysistobeintegratedtogethertosimulatesuperplasticformingprocessforcomplexshapedcomponents.TechniqueshavebeendevelopedtogenerateanFEmeshovernon-four-sidedsurfaceareas,theboundariesofwhichareBeziercurvesofarbitrarydegree,usingaconsistentexpression.TheoreticalevidenceisgiventodeterminethenumberofBeziertriangularpatchesrequiredforaccuratelyre-constructingdiesurfaceswithinacommercialFEsolver.Thedevelopedtechniqueshavebeensuccessfullyusedindeterminingtheprocessparametersforforminga3Drectangularbox.

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简介：Acoupledmaplatticeswithconvectivenonlinearityor,forshort,ConvectiveCoupledMap(CCM)isproposedinthispapertosimulatespatiotemporalchaosinfluidflows.ItisfoundthattheparameterregionofspatiotemporalchaoscanbedeterminedbythemaximalLiapunovexponentofitscomplexitytimeseries.Thissimplemodelimpliesasimilarphysicalmechanismforturbulencesuchthattheroutetospatiotemporalchaosinfluidflowscanbeenvisaged.

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简介：为结构化的P2P蠕动的un-的贪婪繁殖政策采用每个节点的附近的节点表在对等(P2P)联网加快P2P蠕虫的繁殖。在描述P2P蠕虫的技术背景以后，贪婪繁殖的算法被探讨。为这条新奇繁殖政策模仿设计也被描述。然后，在传播上的贪婪繁殖政策的效果加速，在静态的P2P蠕虫的会聚的集中速度，和攻击交通被模仿并且讨论。主要试验性的结果证明贪婪繁殖是有害的并且能把严重损坏带到P2P网络。

简介：Thesimulationprogramdevelopedbythe"ModelsofNetworkedAnalysisatRegionalCenters"(MONARC)projectisapowerfulandflexibletoolforsimulatingthebehavioroflargescaledistributedcomputingsystems,Inthisstudy,wefurthervalidatethissimulationtoolinalarge-scaledistributedfarmcomputingsystem.Wealsoreporttheusageofthissimulationtooltoidentifythebottlenecksandlimitationsofourfarmsystem.

简介：ＳｉｍｕｌａｔｉｎｇＴｅｓｔｓｆｏｒｔｈｅＨｅａｔ－ｔｒｅａｔｍｅｎｔｏｆＡｎｃｉｅｎｔＢｒｏｎｚｅＭｉｒｒｏｒｓＨｅＴａｎｇｋｕｎ何堂坤（ＩｎｓｔｉｔｕｉｅｏｌＨｉｓｌｏｒｉ．ｏｆＮａｔｕｒａｌＳｃｉｅｎｃｅ．ＡｃａｄｅｍｉａＳｉｎｉｃａＢｅｉｊｉ...

简介：ThecanopyrainfallinterceptionmodeilinkedtoenvironmentalconditionsandbiologicalfeaturesisestablishedonthebasisofstationaryobservationandmeasurementsinChina.UpscalingfromsiteobservationtoregionalIevelestimationofcanopyrainfallinterceptionhasbeenmade.ThepotentialinterceptionvalueofforestsduringtherainfallseasoninChinaaccordingtorainfallrecordsofMay,JulyandSeptemberintheyear1982,hasbeensimulatedandmappedundertheGISsoftwarepackageIdris...

简介：佩恩State/NCARMesoscale模型(MM5)被用来模仿发生在1鈥期间的降水事件吗？1994年5月到长江的南方。在五个实验，实物租税鈥揊ritsch计划为subgrid鈥搒c淡色啤酒被使用对流降水，而是microphysicalparameterization策划的五不同可溶解的鈥搒c淡色啤酒被采用。他们是简单过度饱和移动计划，Hsie等的温暖的雨计划。(1984)，Dudhia(1989)的简单的冰计划，复杂混合鈥損hase计划由Reisner等发展了。(1993)，并且有graupel的GSFCmicrophysical计划。我们的兴趣是各种各样的可溶解规模的计划怎么影响平均域的降水，降水分发，海水平压力，云水和云冰。通过关于一个温暖的部门降雨盒子的一系列实验，结果证明尽管不同可溶解规模的计划被使用，在所有五跑之中的降水特征的差别不是很明显的。然而，降水是过去预言的并且强壮的mesoscale低被简单过度饱和移动计划生产。有冷凝作用和蒸发在预言下面的包括的温暖的雨计划降水并且允许云水到达300hPa水平。graupel的增加的计划由大约20%-30%增加可溶解规模的降水。在格子规模计划的supercooled液体水的包括不显著地影响结果。关键词Mesoscale模型-降水-可溶解规模的microphysicalparameterization

简介：AbstractBackground:As reported by the World Health Organization, a novel coronavirus (2019-nCoV) was identified as the causative virus of Wuhan pneumonia of unknown etiology by Chinese authorities on 7 January, 2020. The virus was named as severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) by International Committee on Taxonomy of Viruses on 11 February, 2020. This study aimed to develop a mathematical model for calculating the transmissibility of the virus.Methods:In this study, we developed a Bats-Hosts-Reservoir-People transmission network model for simulating the potential transmission from the infection source (probably be bats) to the human infection. Since the Bats-Hosts-Reservoir network was hard to explore clearly and public concerns were focusing on the transmission from Huanan Seafood Wholesale Market (reservoir) to people, we simplified the model as Reservoir-People (RP) transmission network model. The next generation matrix approach was adopted to calculate the basic reproduction number (R0) from the RP model to assess the transmissibility of the SARS-CoV-2.Results:The value of R0 was estimated of 2.30 from reservoir to person and 3.58 from person to person which means that the expected number of secondary infections that result from introducing a single infected individual into an otherwise susceptible population was 3.58.Conclusions:Our model showed that the transmissibility of SARS-CoV-2 was higher than the Middle East respiratory syndrome in the Middle East countries, similar to severe acute respiratory syndrome, but lower than MERS in the Republic of Korea.

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简介：Inrealseastates,damageincidentsonoffshorefloatingstructuresarenotduetothewholetimeseriesofwaveelevationcharacterizedasstatisticalonebutduetofewextremewavesorwavegroupsinirregularwavetrain.So,usingCFDtoolstopreciselysimulatepredeterminedirregularwavetrainwilllaysoundbasisforunderstandingthelocalcharacteristicoftheflowfieldandimpactloadsonoffshorefloatingstructureswhendamageincidentsoccur.Inthisarticle,thegenerationofsingleextremewaveisinvestigatedinanumericalwavetank.First,experimentalirregularwavetrainisdecomposedintocertainnumberofsmall-amplitudewaves.TheFourierseriesexpansionisperformedtodeterminetheamplitudeandinitialphaseangleofeachwavecomponent.Ahydrodynamictransferfunctionisusedtocalculatetheamplitudeofwave-makermotionassociatedwitheachwavecomponent.Thensuperpositioniscarriedoutonallofthewave-makermotioncomponentstogetthefinalwave-makermotion.Withthewave-makermotionasinput,simulationofthesingleextremeirregularwavetrainismodeledsuccessfully.Thenthemethodisappliedtosimulatingamuchmorecomplicatedirregularwavetrain.OnceagainmainfeaturesofthecomplicatedirregularwavetrainarereproducedcomparedwithexperimentcarriedoutinthenewdeepwaterexperimentalbasinatShanghaiJiaoTongUniversity.Inthesimulation,dynamicmeshmethodisenabledtomodelthepiston-typewave-maker,theVolumeOfFluid(VOF)methodisemployedtocapturethefreesurfaceandadissipationzoneisintroducedtodealwithwavereflection.

简介：Afinitedifferencemethodispresentedtosimulatetransversevibrationsofanaxiallymovingstring.Bydiscretizingthegoverningequationandtheequationofstress-strainrelationatdifferentfrictionalknots,twolinearsparsefinitedifferenceequationsystemsareobtained.Thetwoexplicitdifferenceschemescanbecalculatedalternatively,whichmakethecomputationmuchmoreefficient.Thenumericalmethodmakesthenonlinearmodeleasiertodealwithandoftruncationerrors,O(Δt~2+Δx~2).Italsoshowsquitegoodstabilityforsmallinitialvalues.Numericalexamplesarepresentedtodemonstratetheefficiencyandthestabilityofthealgorithm,anddynamicanalysisofaviscoelasticstringisgivenbyusingthenumericalresults.

简介：Anumericalmethodforsimulatingnonlinearfluid-rigidstructureinteractionproblemsisdeveloped.Thestructureisassumedtoundergolargerigidbodymotionsandthefluidflowisgovernedbynonlinear,viscousornon-viscous,fieldequationswithnonlinearboundaryconditionsappliedtothefreesurfaceandfluid-solidinteractioninterfaces.AnArbitrary-Lagrangian-Eulerian(ALE)meshsystemisusedtoconstructthenumericalmodel.Amulti-blocknumericalschemeofstudyisadoptedallowingfortherelativemotionbetweenmovingoversetgrids,whichareindependentofoneanother.Thisprovidesaconvenientmethodtoovercomethedifficultiesinmatchingfluidmesheswithlargesolidmotions.Nonlinearnumericalequationsdescribingnonlinearfluid-solidinteractiondynamicsarederivedthroughanumericaldiscretizationschemeofstudy.Acouplingiterationprocessisusedtosolvethesenumericalequations.Numericalexamplesarepresentedtodemonstrateapplicationsofthemodeldeveloped.

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