简介：ThispaperanalyzestheimpactsofurbanizationandunemploymentrateonChina’sdivorceratewiththepaneldataof31Chineseprovincesfrom2000to2011.Thestudymanifestsasfollows.First,thesignificantinfluenceofurbanizationcannotbeobservedontherisingbreakdownsincethelatterisnottheinevitableresultoftheformer.Inthesecondplace,unemploymentratehasasignificantnegativeinfluenceondivorcerate,namely,withtheformerincreasing,thelatterwilldecrease,whichechoestheperspectiveofdivorcecost.Andfinally,thispaperalsofindspositiveeffectsofpercapitafixedinvestment,old-agedependencyrate,averagehouseholdsize,theproportionoffloatingpopulationandpopulationdensity,andnegativecorrelationofaverageeducationattainmentondivorcerate.

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简介：The3-stageClosnetworkC(n,m,r)isconsideredasthemostbasicandpopularmultistageinterconnectionnetworkwhichhasbeenwidelyemployedfordatacommunicationsandparallelcomputingsystems.Quitealotofeortshasbeenputontheresearchofthe3-stageClosnetwork.Unfortunately,verylittleisknownforthemultiratemulticastClosnetworkwhichisthemostcomplicatedcase.Firstlyasucientconditionfor1-ratemulticastnetworkstobeSNBisgiven,fromwhicharesultfor2-ratemulticastnetworkstobeWSNBcaneasilybegotten.Furthermore,byusingareservation-schemerouting,morespecificresultfor2-ratemulticastnetworkstobeWSNBcanbeobtainedforthecaseofoneofthemexceeding1/2.

简介：AbstractBackground:The ongoing COVID-19 pandemic hit South America badly with multiple waves. Different COVID-19 variants have been storming across the region, leading to more severe infections and deaths even in places with high vaccination coverage. This study aims to assess the spatiotemporal variability of the COVID-19 pandemic and estimate the infection fatality rate (IFR), infection attack rate (IAR) and reproduction number (R0) for twelve most affected South American countries.Methods:We fit a susceptible-exposed-infectious-recovered (SEIR)-based model with a time-varying transmission rate to the reported COVID-19 deaths for the twelve South American countries with the highest mortalities. Most of the epidemiological datasets analysed in this work are retrieved from the disease surveillance systems by the World Health Organization, Johns Hopkins Coronavirus Resource Center and Our World in Data. We investigate the COVID-19 mortalities in these countries, which could represent the situation for the overall South American region. We employ COVID-19 dynamic model with-and-without vaccination considering time-varying flexible transmission rate to estimate IFR, IAR and R0 of COVID-19 for the South American countries.Results:We simulate the model in each scenario under suitable parameter settings and yield biologically reasonable estimates for IFR (varies between 0.303% and 0.723%), IAR (varies between 0.03 and 0.784) and R0 (varies between 0.7 and 2.5) for the 12 South American countries. We observe that the severity, dynamical patterns of deaths and time-varying transmission rates among the countries are highly heterogeneous. Further analysis of the model with the effect of vaccination highlights that increasing the vaccination rate could help suppress the pandemic in South America.Conclusions:This study reveals possible reasons for the two waves of COVID-19 outbreaks in South America. We observed reductions in the transmission rate corresponding to each wave plausibly due to improvement in nonpharmaceutical interventions measures and human protective behavioral reaction to recent deaths. Thus, strategies coupling social distancing and vaccination could substantially suppress the mortality rate of COVID-19 in South America.

简介：Domaindecompositionmethodandmultigridmethodcanbeunifiedintheframeworkofthespacedecompositionmethod.Thispaperhasobtainedanewresultontheconvergencerateofthespacedecompositionmethod,whichcanbeappliedtosomenonuniformlyellipticproblems.

简介：Inthispaperweprovethattheasymptoticrateofconvergenceofthemod-ifiedGauss-Seidelmethodofanon-singularM-matrixisamonotonicfunctionforpreconditionparameters0≤αi≤1-2,(i=1,2,…,n-1).

简介：ThestressrateintegralequationsofelastoplasticityarededucedbasedonRef.[1]byconsistentmethods.Thepointatwhichthestressesand/ordisplacementsarecalculatedcanbeinthebodyorontheboundary,andintheplasticregionorelasticone.Theexistenceoftheprincipalvalueintegralintheplasticregionisdemonstratedstrictly,andthetheoreticalbasisispresentedforthepaticularsolutionmethodbyunitinitialstressfields.Inthepresentmethod,programmingiseasyandgeneral,andthenumericalresultsareexcellent.

简介：InJuly2005,thePeople'sBankofChinaof-ficiallyannouncedthatitwouldadoptaman-ageablefloatingexchangerate,adjustedac-cordingtoabasketofcurrenciesbasedonmarketsupplyanddemand.Onthatday,theexchangerateoftheRMBtotheU.S.Dollarincreasedby21percent,andsincethentheRMBexchangeratehasgraduallyturnedtoamoreflexibleex-changerateconvention,ratherthanfocusingon

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简介：InthispaperweprovethattheconvergencerateofthemodifiedGauss-Seidelmethodisamonotonicfunctionforsomepreconditionparameters.

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简介：基于非平衡热力学理论，最小的精力驱散率原则能从最小的熵被导出生产率原则。最小的熵生产率原则等价于最小的精力驱散率原则。为了验证液体运动追随者最小精力驱散率原则，RNGk骚乱模型和GMO，流动3D当模特儿被使用在笔直地矩形的斜槽模仿液体运动。结果证明那个液体运动满足最小的精力驱散率原则。冲积的河的最小的精力驱散率的有效性与地数据被测试了。当一个河系统以一个相对平衡状态时，它的精力驱散率的价值在最小。最小的值取决于用于河系统的限制。由于一条河的动态性质，然而，最小的价值可以变化与对时间和地点各自。统一溪流力量原则的最小的溪流力量和最小是更一般的最小的精力驱散率原则的特殊、简化的版本。

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简介：为解决椭圆形的部分微分方程的边界价值问题的一个概括添加剂Schwarz算法的集中率被学习。集中率的定量分析为模型Dirichlet问题被给。算法的更大的加速能被合适选择参数获得，这将被显示出。Somenumerical测试也在这篇论文被介绍。

简介：Thequasi-conformingelementofthecurvedbeamandshallowcurvedbeamisgiveninthispaper.Numericalexamplesillustratethatthequasi-conformingelementsofthecurvedbeamandshallowcurvedbeamWhichisusedtoaooroximatethecurvedbeamhavebetteraccuracythanthestraightbeamelement.Thecurvedbeamelementconstructedbydisplacementmethodcannotsatislyrigidbodymotionconditionandthevervfinegridshavetobeusedinordertosatisfyrigidbodymotionconditionapproximately.Inthispaperitisprovedthatthestraightbeamelementandthequasi-conformingelementofthecurvedbeamandshallowcurvedbeam.whenelementsizeisreducedinfinitely,haveconvergenceratewiththesameorderO(l~2)andwhenregulurelementsareused,Iistheelementlength.

简介：这篇论文论述一个模型在限制顺序书描述动态做贸易过程。由与时间和限制顺序书的深度学习限制订单的实行可能性的动态模式，作者与下列性质得出结论：市场的到达率作为深度买订单增加作为深度在书增加和减少买队列卖队列增加，并且反过来也如此；为市场的到达率的类似的整齐卖订单；两市场的到达率买顺序和市场以一样的数量在书增加作为双方的深度卖订单增加。而且，作者在订单的到达率上描述暂时的详细说明的更多和市场深度的永久效果。

简介：InthispaperweconsideraclassofpolynomialsP(z)=a0+∑nv=tavzv,t≥1notvanishingin|z|