简介：Earthquakeengineershavemadealotofeffortstoderiveacomprehensivesetofclosedformexpressionsforperformanceevaluationofframes,whicharealreadypresentedinguidelinessuchasSAC/FEMA.Theseanalyticalexpressionshavebeendevelopedtoestimatetheannualprobabilityofexceedingalimitstate.Intheprocessofsuchseismicassessments,someessentialassumptionsareadoptedtosimplifytheprocess.Oneofthesefundamentalassumptionsdeclaresthatdriftdemandatanyseismicintensitylevelfollowsalognormaldistributionarounditsmedian.Toinvestigatethevalidityofthisassumption,thispaperdescribesacasestudyofthetypesoferrorsthatcouldbeproducedbyusingthesamplemedianasthecentraltendency.BasedontheMaximumLikelihoodEstimationmethodaswellasotherstatisticalevidence,thispaperproposestheuseofthesamplegeometricmeaninsteadofthesamplemedianforthecentraltendency.Further,theresultsofseismicreliabilityevaluationsof4sampleframesarecomparedbasedonutilizingboththegeometricmeanandthesamplemedian.Inthisprocess,bothfirstandsecondorderpowerlawfitsofthehazardcurveareimplementedtocomparetheeffectsofhazardestimationandtheselectionofthecentraltendencyonthefinalresults.Itisobservedintheapplicationexamplethatthesamplegeometricmeancouldleadtomoreaccurateresults.

简介：《关于进一步加强高等学校计算机基础教学的意见暨计算机基础课程教学基本要求》（以下简称《白皮书》），是由教育部高等学校计算机科学与技术教学指导委员会非计算机专业计算机基础课程教学指导分委员会编写的，由高等教育出版社于2006年9月出版。《白皮书》在“计算机基础教学体系”中首次提出了4×3的知识体系结构和“1＋X”的课程设置方案，即1门“大学计算机基础”（必修）加上几门重点课程（必修或选修）。

简介：面试(interview)完成后,与人事经理或主试者保持一定的联系是很重要的,email和letter都是不错的方式。本文列举了几种面试后'跟进信'(Follow-upLetters)的写作样例,教你如何表达自己的各种意愿。

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简介：AbstractMany factors have been identified as having the ability to affect the sensitivity of rapid antigen detection (RAD) tests for severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). This study aimed to identify the impact of sample processing on the sensitivity of the RAD tests. We explored the effect of different inactivation methods, viral transport media (VTM) solutions, and sample preservation on the sensitivity of four RAD kits based on two SARS-CoV-2 strains. Compared with non-inactivation, heat inactivation significantly impacted the sensitivity of most RAD kits; however, β-propiolactone inactivation only had a minor effect. Some of the VTM solutions (VTM2, MANTACC) had a significant influence on the sensitivity of the RAD kits, especially for low viral-loads samples. The detection value of RAD kits was slightly decreased, while most of them were still in the detection range with the extension of preservation time and the increase of freeze-thaw cycles. Our results showed that selecting the appropriate inactivation methods and VTM solutions is necessary during reagent development, performance evaluation, and clinical application.

简介：Abundanttestdataarerequiredinassessmentofweaponperformance.Whenweapontestdataareinsufficient,Bayesiananalysesinsmallsamplecircumstanceshouldbeconsideredandthetestdatashouldbeprovidedbysimulations.TheseveralBayesianapproachesarediscussedandsomelimitationsarefounded.AnimprovementisputforwardafterlimitationsofBayesianapproachesavailableareanalyzedandtheimprovedapproachisappliedtoassessmentofsomenewweaponperformance.

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简介：Vacuumloadinghasbeenexaminedasawayofpreparinguniformlyconsolidatedsoftclaysamples.Thefacilityandloadingprocedurearedescribedinthispaper.Ananalyticalsolutiontothethreedimensionalconsolidationequationisderivedforestimatingthedegreeofconsolidationofthesoilsamplewithvacuumloading.Thegivenexampleshowsthatthepredicteddegreeofconsolidationofasoftclaybulkwithvacuumloadingisclosetothatmeasuredintheconsolidationprocess.

简介：Thermodynamicpropertiesoffluidsareessentialfortheunderstandingofthegeochemicalbehaviorofvariousprocesses,Thepaperintroducesthemostupdatedcomputermodelingandsimulationmethodsinthestudyofthermodynamicsofgeofluids,inclduingsemiempiricalmodels(suchasequationofstate)andmoleculardynamicsandMonteCarlosimulation.Awell-establishedsemi-empiricalmodelcaninterpolateandextrapolateexperimentaldataandyieldmuchphysicochemicalinformation.Computermodelingmayproduce'experimentaldata'yieldmuchphysicochemicalinformation.Computermodelingmayproduce'experimentaldata'evenunderexperimentallydifficultconditions.Theyprovideimportantmethodsforthestudyofgeologicalfluidsystemsonthequantitativebasis.

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简介：Thepresentingworkdealswithimplementationofsamplegraphicpatternsderivedfrompublishedscientific/technologicdocumentationfiguresonnumericsimulationofmultiphaseflowandFEManalysisofthinwalledmechanicalstructures.First,geometricplanepatternsinrectangular/circularformweredemonstratedincontrasttogradualchangestyleincolorandgraphicconfiguration.Next,selectedartistic/graphicsamplepatternswereimplementedinlogoconceptualdesignandvisualinnovationstorming.Thewayineditingtheaboveoriginalfiguresis2Dsymmetry,rectangulararraygeometrically,andconvertingthemininversecolorinsoftwarelikePS.Theobjectiveofthisworkistocultivate,exploreanddisciplinetrainees'visualabilityinartistic/aestheticappreciation,graphiccommunicationandindustrialdesignandapplication,thuslayingtiescloselyamongcomprehensiveuniversitystudentsfromdifferentmajorsonscience,engineering,artsandhumanity.

简介：让Hausdorff措施功能和螞是积极整数的一个无限的增加序列。Hausdorff类型措施？—m螞联系了到吗？并且螞被学习。LetX(t)(t鈭圧N)是在Rd的某些Gaussian随机的地。我们给图集合GrX的准确Hausdorff措施([0，1]N)，并且评估准确吗？—图象的mΛ措施和X(t)的图集合。顺序Λ上的Anecessary和足够的状况被给以便为X的平常的Hausdorff措施功能([0，1]N)并且GrX([0，1]N)仍然是正确措施功能。如果顺序Λincreases更快，那么，一些更小的措施功能将给积极、有限(?，为X的Λ)-Hausdorff措施([0，1]N)并且GrX([0，1]N)。

简介：ＳｕｍｍａｒｙＲｅｐｏｒｔｏｆｔｈｅＳａｍｐｌｅＳｕｒｖｅｙｏｎＳｃｈｏｏｌＡｔｔｅｎｄａｎｃｅｉｎＰｒｏｊｅｃｔＣｏｕｎｔｉｅｓｏｆＧｕｉｚｈｏｕＷａｎｇＳｉｐｉｎｇＴｈｅｓｕｒｖｅｙｒｅｐｏｒｔｒｅｖｅａｌｓｔｈａｔｂｏｔｈｅｃｏｎｏｍｉｃｄｉｆ...

简介：Stronguniformconsistencyratesaregivenforkerneltypeestimatorsoftheconditionalfunctionwith（?）-mixingsample.Especially,fornonparametricestimatorsofkerneldensity,theregressionfunctionwhenYisbounded,conditionaldf’s,L-smoothingandM-smoothing,weobtainthesamerateO(（n/logn）-1/3)asinthei.i.d.sampleestablishedbyH（?）rdle,JanssenandSerfling.

简介：TwomethodsformeasuringtheattenuationQvalue,frequency-amplituderatiomethodandwaveforminversionmethod,wereanalyzed.Thesizeandshapeofmostrocksamplesinthelaboratorycanhardlyfulfilltherigorousrequirementsoftheabovemethods.AnewtestmethodofusingthewaveenergytocalculatetheQvaluewasproposed.Theprinciple,calculationformulaeandsomepointsforattentionwereexpounded;therelationshipbetweenQ_PandQ_Ewasdiscussed;andmanysamplesweremeasuredbythismethod.Theresultwascomparedwiththosebyothermethods,anditwasconsideredthattheQvaluebythismethodliesbetweenQ_PandQ_E·

简介：Therearemanyadvantagesofmaterialsurfacemodificationbyionbeam,suchastheionsareselectedfreelyandthetemperatureofspecimensisunconfinedduringtheprocessofimplantation.Duetotheconductionofenergyprovidedbytheimplantedions,itwillbringabouttherespondenceofsampletemperaturewhichpromotesthecompoundtoform,integrateanddiffuseefficiently.

简介：<正>Inthispaper,aclassoffunctionalsofKaplan-Meierestimatorisinvestigated.Countingprocessmartingalemethodsareusedtoshowtheasymptoticnormality,andweestablishameansquareerrorinequalityandaprobabilityinequalityofthemwithouttheassumptionthatF,Garecontinuous,whereF,Garesurvivaltimedistributionandcensoringtimedistributionrespectively.