简介：<正>Acompletecharacterizationofnormaloperatorswhicharesimilartoirreducibleoperatorsandsomerelatedresultsaregiven.

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简介：Thispaperaddressesthepresent-daycontextofSystemsEngineering,revisitingandsettingupanupdatedframeworkfortheSIMILARprocessinordertouseittoengineerthecontemporarysystems.Thecontemporaryworldiscrowdedoflargeinterdisciplinarycomplexsystemsmadeofothersystems,personnel,hardware,software,information,processes,andfacilities.Anintegratedholisticapproachiscrucialtodevelopthesesystemsandtakeproperaccountoftheirmultifacetednatureandnumerousinterrelationships.Asthesystem'scomplexityandextentgrow,thenumberofpartiesinvolved(stakeholdersandshareholders)usuallyalsoraises,bringingtotheinteractionaconsiderableamountofpointsofview,skills,responsibilities,andinterests.TheSystemsEngineeringapproachaimstotacklethecomplexandinterdisciplinarywholeofthosesocio-technicalsystems,providingthemeanstoenabletheirsuccessfulrealization.Itsexploitationinourmodernworldisassuminganincreasingrelevancenoticeablebyemergentstandards,academicpapers,internationalconferences,andpost-graduateprogrammesinthefield.Thisworkaimstoprovide'thepicture'ofmodernSystemsEngineering,andtoupdatethecontextoftheSIMILARprocessmodelinordertousethisrenewedframeworktoengineerthechallengingcontemporarysystems.Theemergingtrendsinthefieldarealsopointed-outwithparticularreferencetotheModel-BasedSystemsEngineeringapproach.

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简介：让ScR2是重申的功能系统的引起注意的人{f{，f2，f3}那么在联合起来的等边三角形上重申英尺(x)=Xtx+bhi=1,2,3，x={Xl，x2)，bx=(0,0)，b2=(1-A2,0)，b3=(-2.,-(1-A3))。这篇论文在关于收缩参数的一些条件下面决定准确Hausdorff措施，集中的盖住的措施和S的收拾行李的措施。

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简介：Thispaperservestwopurposes.OneistomodifyStrichartz’sresultswithrespecttotheasymptoticaveragesoftheFouriertransformofμon,self-similarmeasuredefinedbyHutchinson.Anotherpurposeistoconsiderasingularintegraloperatoronμandshowthatthisop-eratorisoftype(p,p)(1

简介：Firstofalltheauthorsintroducetheconceptsofrandomsub-self-similarsetandrandomshiftsetandthenconstructtherandomsub-self-similarsetbyarandomshiftsetandacollectionofstatisticalcontractionoperators.

简介：AbstractA novel bat-origin coronavirus emerged in Wuhan, China in December 2019 and continues to spread across China and the world. At the time of writing, a massive global response has been implemented to control the disease as it spreads from person to person. Yet the high-risk human-wildlife interactions and interfaces that led to the emergence of SARS-CoV and of 2019-nCoV continue to exist in emerging disease hotspots globally. To prevent the next epidemic and pandemic related to these interfaces, we call for research and investment in three areas: 1) surveillance among wildlife to identify the high-risk pathogens they carry; 2) surveillance among people who have contact with wildlife to identify early spillover events; and 3) improvement of market biosecurity regarding the wildlife trade. As the emergence of a novel virus anywhere can impact the furthest reaches of our connected world, international collaboration among scientists is essential to address these risks and prevent the next pandemic.

简介：Somekindsoftheself-similarsetswithoverlappingstructuresarestudiedbyintroducingthegraph-directedconstructionssatisfyingtheopensetconditionthatcoincidewiththesesets.Inthisway,thedimensionsandthemeasuresareobtained.

简介：为前列腺癌症介绍雄激素剥夺治疗的最适当的时间仍然保持争论。我们的目的是在在老鼠前列腺(流浪者)的转基因的腺癌的癌症前进和幸存建模的前列腺上评估早对推迟的外科的阉割的效果。流浪者老鼠随机被划分成三个组：早阉割组(在哪个上阉割在4个星期岁时被执行)，推迟的阉割组(在哪个上当腹的瘤能被摸时，阉割被执行)，并且假冒阉割组。老鼠每天在整个他们的生活被监视直到癌症相关的死亡或显然垂死的外观，在时间，单个老鼠被打死的发展。在前列腺瘤的雄激素受体表达式也被计算。在早阉割，推迟的阉割和假冒阉割的平均lifespan组织的结果表演分别地是54.1个星期，59.9个星期和39.1个星期。当时，早阉割和推迟的阉割授与一个统计上重要的幸存优点与假冒阉割组相比(P<0.001)。然而，在在早阉割组和推迟的阉割组之间的lifespan的差别不是统计上重要的(P=0.85)。在收到了早或推迟的阉割的TRAMP老鼠的lifespan的增加比假冒阉割老鼠在死亡与更低的G/B价值(泌尿生殖器的道重量/身体重量)相关。在结论，在流浪者老鼠的早、推迟的阉割延长了幸存到类似的程度。这发现可以在前列腺癌症治疗为临床的实践提供一个指南。

简介：—Theresultsofdesignandexperimentofasubmergedsemi-circularbreakwaterattheYangtzeestuaryshowthatthesubmergedstructurewillbeunsafewhenthegeneralempiricalwaveforceformulaforsemi-circularbreakwaterisusedindesign.Therefore,anewcalculationmethodforthewaveforcesact-ingonasubmergedsemi-circularstructureisgiveninthispaper,inwhichthewaveforceactingonthein-sidecircumferenceofsemi-circulararchisincluded,andthephasemodificationcoefficientinthegeneralempiricalformulaisadjustedaswell.Thenewwaveforcecalculationmethodhasbeenverifiedbythere-sultsofsevenrelatedphysicalmodeltestsandadoptedinthedesignofthesouthesturaryjettyofthefirststageprojectofDeepChannelImprovementProjectoftheYangtzeRiverEstuary,thetotaljettylengthbe-ing17.5km.

简介：Lin-Reissner-Tsien方程在接近音速的近似下面描述不稳定的接近音速的流动。在现在的纸，方程经由类似转变被归结为一个平常的微分方程。产生方程是然后解决的经分解并且完全在一些情况中弄平。数字模拟被为没有准确答案的在盒子提供。旅行波浪答案也被获得。

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简介：TheSelf-SimilarCrackExpansion(SSCE)methodisproposedtoevaluatestressintensi-tyfactorsatcracktips,wherebystressintensityfactorsofacrackcanbedeterminedbythecrackopeningdisplacementoverthecrack,notjustbythelocaldisplacementaroundthecracktip.Thecrackexpansionrateisestimatedbytakingadvantageofthecrackself-similarity.Therefore,theaccuracyofthecalculationisimproved.Thesingularintegralsoncracktipelementsarealsoanalyzedandarepre-ciselyevaluatedintermsofaspecialintegralanalysis.Combinationofthesetwotechniquesgreatlyin-creasestheaccuracyinestimatingthestressdistributionaroundthecracktip.Avarietyoftwo-dimen-sionalcracks,suchassubsurfacecracks,edgecracks,andtheirinteractionsarecalculatedintermsoftheself-similarexpansionrate.Solutionsaresatisfiedwitherrorslessthan0.5%ascomparedwiththeanalyticalsolutions.Basedonthecalculationsofthecrackinteractions,atheoryforcrackinteractionsisproposedsuchthatforagroupofalignedcracksthesummationofthesquareofSIFsattherighttipsofcracksisalwaysequaltothatatthelefttipsofcracks.ThistheorywasprovedbythemehtodofSelf-SimilarCrackExpansioninthispaper.

简介：周和冯摆姿势一在2004的自我类似的集合上的conjecture。在这篇论文，一个自我类似的集合被构造它有最好盖住但是它的自然盖住不是最好的。因此，我们确实把一个否定答案给conjecture。

简介：Inthispaper,aclassofsimilarcompositesystemsisdiscussed,whoseinterconnectionsareasymmetricalandmismatched.Theinterconnectionconditionisproposed.Basedonit,theinterconnectionsaredividedintotwoparts.Onesatisfiestheinterconnectioncondition,bymeansofthetwo--stepmethod,thedecentralizedcontrollersaredesigned.Theotherdoesnotsatisfytheinterconnectioncondition,butthisisoffsettedbygoodqualityofthesystemitself.Basedonthese,asufficientconditionisgivenbysomelinearmatrixinequalities,whichmakesthestudiedsystemsquadraticstabilevialineardecentralizedcontrollersbymakinguseoftheinformationofinterconnectionsbetter.

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简介：Itisgenerallythoughtthattheinfluenceofcomparabletracktyphoonsisapproximatelysimilar,butinfacttheirwindandespeciallytheirrainstormdistributionareoftenverydifferent.Therefore,acontrastiveanalysisofrainstormsbytropicalcyclones(TCs)Haitang(0505)andBilis(0604),whichareofasimilartrack,isdesignedtohelpunderstandthemechanismoftheTCrainstormandtoimproveforecastingskills.ThedailyrainfallofTCHaitang(0505)andBilis(0604)isdiagnosedandcompared.TheresultindicatesthatthesetwoTCshavesimilarprecipitationdistributionbeforelandfallbutdifferentprecipitationcharacteristicsafterlandfall.UsingNCEP/GFSanalysisdata,thesynopticsituationisanalyzed;watervaportransportationisdiscussedregardingthecalculatedwatervaporfluxanddivergence.TheresultsshowthattheheavyrainfallintheZhejiangandFujianProvincesassociatedwithHaitang(0505)andBilis(0604)beforelandfallresultsfromaperipheraleasterlywind,acombinationofthetropicalcycloneandtheterrain.Afterlandfallandmovingfarinlandofthestorm,theprecipitationofHaitangiscausedbywatervaporconvergencecarriedbyitsowncirculation;itismuchweakerthanthatinthecoastalarea.OneoftheimportantcontributingfactorstoheavyrainstormsinsoutheastZhejiangisasoutheastjetstream,whichismaintainedoverthesoutheastcoast.Incontrast,theSouthChinaSeamonsooncirculationtransportslargeamountsofwatervaporintoBilis–whenawater-vaportransportbeltsouthofthetropicalcyclonesignificantlystrengthens–whichstrengthensthetransport.Then,itcauseswatervaporfluxtoconvergeonthesouthsideofBilisanddivergeonthenorthside.Precipitationismuchstrongeronthesouthsidethanthatonthenorthside.AfterBilistravelsfarinland,thecoldairguidedbyanorthtroughtravelsintotheTCandremarkablyenhancesprecipitation.Insummary,combiningverticalwindshearwithwatervaportransportationis