简介：Modelinglog-mortalityratesonO-UtypeprocessesandforecastinglifeexpectanciesareexploredusingU.S.data.IntheclassicLee-Cartermodelofmortality,thetimetrendandtheage-specificpatternofmortalityoveragegrouparelinear,thisisnotthefeatureofmortalitmodel.Toavoidthisdisadvantage,O-Utypeprocesseswillbeusedtomodelthelog-mortalityinthispaper.Infact,thismodelisanAR(1)process,butwithanonlineartimedriftterm.BasedonthemortalitydataofAmericafromHumanMortalitydatabase(HMD),mortalityprojectionconsistentlyindicatesapreferenceformortalitywithO-UtypeprocessesoverthosewiththeclassicalLee-Cartermodel.Bymeansofthismodel,thelowboundsofmortalityratesateveryagearegiven.Therefore,lengtheningofmaximumlifeexpectanciesspanisestimatedinthispaper.

简介：令R是有1的结合环,本文中给出R上某些2×2块阵的群逆的存在性及表示.

简介：Thispaperproposesandmakesastudyofanewmodel(calledthe3/2plusjumpsmodel)forVIXoptionpricing.Themodelallowsthemean-reversionspeedandvolatilityofvolatilitytobehighlysensitivetotheactuallevelofVIX.Inparticular,thepositivevolatilityskewisaddressedbythe3/2plusjumpsmodel.Dailycalibrationisusedtoprovethattheproposedmodelpreservesitsvalidityandreliabilityforbothin-sampleandout-of-sampletests.Theresultsshowthatthemodelsarecapableoffittingthemarketpricewhilegeneratingpositivevolatilityskew.

简介：Inthisarticle,the2-variablegeneralpolynomialsaretakenasbasewithPeterspolynomialstointroduceafamilyof2-variablePetersmixedtypepolynomials.Thesepolynomialsareframedwithinthecontextofmonomialityprincipleandtheirpropertiesareestablished.Certainsummationformulaeforthesepolynomialsarealsoderived.Examplesofsomemembersbelongingtothisfamilyareconsideredandnumbersrelatedtosomemixedspecialpolynomialsarealsoexplored.

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简介：X-rayimagingistheconventionalmethodfordiagnosingtheorthopedicconditionofapatient.ComputerizedTomography(CT)scanningisanotherdiagnosticmethodthatprovidespatient’s3Danatomicalinformation.However,bothmethodshavelimitationswhendiagnosingthewholeleg;X-rayimagingdoesnotprovide3Dinformation,andnormalCTscanningcannotbeperformedwithastandingposture.Obtaining3Ddataregardingthewholeleginastandingpostureisclinicallyimportantbecauseitenables3Danalysisintheweightbearingcondition.Basedontheseclinicalneeds,ahardware-basedbi-planeX-rayimagingsystemhasbeendeveloped;itusestwoorthogonalX-rayimages.However,suchmethodshavenotbeenmadeavailableingeneralclinicsbecauseofthehightcost.Therefore,weproposedawidelyadaptivemethodfor2DX-rayimageand3DCTscandata.Bythismethod,itispossibletothreedimensionallyanalyzethewholeleginstandingposture.TheoptimalpositionthatgeneratesthemostsimilarimageisthecapturedX-rayimage.Thealgorithmverifiesthesimilarityusingtheperformanceoftheproposedmethodbysimulation-basedexperiments.Then,weanalyzedtheinternal-externalrotationangleofthefemurusingrealpatientdata.Approximately10.55degreesofinternalrotationswerefoundrelativetothedefinedanterior-posteriordirection.Inthispaper,wepresentausefulregistrationmethodusingtheconventionalX-rayimageand3DCTscandatatoanalyzethewholelegintheweight-bearingcondition.

简介：由全国大学生数学建模竞赛组委会、《数学建模及其应用》编辑部和山东科技大学数学与系统科学学院联合主办,山东科技大学数学与系统科学学院承办的2018年全国数学建模研讨会将于7月20—23日在青岛召开.本次会议拟设3个主题,分别是（1）大数据分析中的数学建模;（2）复杂网络数学建模;（3）数学建模竞赛中有关方法探讨.本次会议欢迎参会代表投稿,请将论文摘要于2018年6月20日前。

简介：根据《山东省高端会计人才选拔培养实施方案》（鲁财会[2011]43号）要求，山东省财政厅决定开展2018年省高端会计人才选拔培养工作。

简介：为做好2017年度行政事业单位内部控制报告的编报工作，枣庄市财政局于3月9日组织召开2017年度行政事业单位内部控制报告编报培训会议。各区（市）会计管理局局长、主要负责人及相关工作人员共30余人参加。