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简介：Toreducemechanicalvibrationsinducedbybigerrorscompensation,anewsoftwarecompensationmethodbasedonanimproveddigitaldifferentialanalyzer(DDA)interpolatorforstaticandquasi-staticerrorsofmachinetoolsisproposed.BasedonprincipleoftraditionalDDAinterpolator,aDDAinterpolatorisdividedintocommandgeneratorandcommandanalyzer.Therearethreetypesoferrors,consideringthedifferenceofpositionsbetweencompensationpointsandinterpolationsegments.Accordingtotheclassification,errorsaredistributedevenlyindataprocessingandcompensatedtocertaininterpolationsegmentsinmachining.On-lineimplementationresultsshowthattheproposedapproachgreatlyimprovespositioningaccuracyofcomputernumericalcontrol(CNC)machinetools.

简介：ＡｎＩｎｔｅｒｖｉｅｗｗｉｔｈＬｉＹｉｎｉｎｇＯｎＪａｎｕａｒｙ１７，１９９４，ｏｕｒｒｅｐｏｒｔｅｒｉｎｔｅｒｖｉｅｗｅｄＭｒＬｉＹｉｎｉｎｇ，ｗｅｌｌ－ｋｎｏｗｎｐｒｏｆｅｓｓｏｒｏｆｅｃｏｎｏｍｉｃｓ，ｍｅｍｂｅｒｏｆｔｈｅＳｔａｎｄｉｎｇＣｏ...

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简介：Aprocedureforreanalysisofvariousstructuressubjectedtovarioustopologicalmodifi-cationsispresented.Theprocedureisbasedontheresultsofasingleexactanalysisandthefactoriza-tionofthestiffnessmatrixofinitialstructures.Itissuitableforthecaseofadditionofjoints,wherethenumberofthedegreesoffreedomisincreased.Themethoddealswiththestiffnessmatrixofstruc-turesdirectly,soitcanbeusedwithageneralfiniteelementsystem.Itisshownthattheproposedap-proximationmethodismosteffectiveintermsofaccuracy,efficiency,andeaseofimplementation.

简介：InthispaperanumericalanalysismethodcombiningFEMincementaltechniquewithlimitanalysisconceptisproposedforthestudyofthestaticstrengthofoffshoreplatformincollision.Largedeformationandplasticityareaccountedforandthelimityieldsurfaceexpressedbygeneralizedstressforatubularsectionisderived.ThemodifiedstiffnessmatrixofspacebeamelementisformulatedbyPlasticNodeMethod.Thebucklingbehaviorofbeamcolumnscanalsobetakenintoaccount.Itcantracethegenerationofplastichingesduringloadingandfinallytheultimatestrengthofoffshoreplatformagainstcollisionisobtained.

简介：Boers-Li画廊的迅速成长毫无疑问与老板皮力有着直接的关系,皮力有着多重身份：博士、批评家、中国最顶尖的艺术策展人之一、中央美院艺术管理系老师。2005年,策展人皮力与WalingBoers在草场地共同创办了UniversalStudiosbeijing,其后更名为Boers-Li画廊。

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简介：静态的球状地对称的空间时间的保角的Ricci关口线条被学习。当Ricci张肌是非退化的时，产生保角的Ricci关口线条的向量领域的一般表格被发现，在哪个情况独立保角的Ricci关口线条的数字是15，为四维的manifolds的最大的数字。在退化盒子中，静态的球状地对称的空间时间总是有保角的Ricci关口线条的一个无限的数字，这被发现。一些例子被提供它承认重要保角的Ricci关口线条，和这件事的完美的液体来源。

简介：Thispapergivesanexactanalysisofarotatingpiezoelectricsphericalshellwitharbitrarythickness.Atfirst,threedisplacementfunctionsareintroducedtosimplifythebasicequationsofasphericallyisotropic,piezoelectricmedium.Byexpandingthedisplacementfunctionsaswellastheelectricpotentialintermsofsphericalharmonics,thebasicequationsofequilibriumareconvertedtoanuncoupledEulertype,secondorderordinarydifferentialequationandacoupledsystemofthreesecondorderordinarydifferentialequations.Ageneralsolutiontothehomogeneousequationsofequilibriumisthenderived.Thestaticanalysisofarotatingsphericalshellisthenperformedandnumericalexampleispresented.

简介：Anovelstructureoffiberopticbiosensoranditsprincipleareintroduced.Thesampleisdetectedinmicrochannelsofseveralmicronsdiameterinfiberopticbiosensors.Therelationbetweentheopticfibertaperedangleandthefluorescenceincidentangleiscalculatedinsignalreceivingpart.Asthesensorisazero-ordersystem,calculatingformulaofthestaticsensitivityisderived.WhenZnSenano-crystallineclusterisusedformarkingthemolecules,thestaticsensitivityforfiberopticbiosensorsiscalculated.Atthesametime,therelationbetweenthestaticsensitivityandtheratioofexcitingwavelengthtofluorescencewavelengthispresented.

简介：TheAndroidplatformisthemostpopularmobileoperatingsystem.WiththeincreaseofthenumberofAndroidusers,alotofsecurityissueshaveoccurred.InordertodetectthemaliciousbehaviorsfortheinstalledAndroidApps,inthispaper,weproposeanAndroidmalwaredetectingschemebyintegratingstaticanddynamicanalysismethods.WeuseAndroguardandDroidBoxtoextractthefeatures,andthenremovetheirrelevantfeatures.Thenweemploythesupportvectormachine(SVM)toclassifytheAndroidmalwareandbenignware.Fromtheresultofourproposedscheme,theproposedintegratedstaticanddynamicanalysisschemewithSVMcaneffectivelydetecttheAndroidmalware.

简介：GrindinginkwasanimportantstepofpaintingandwritingforChineseliteratiinancienttimes.PainterMr.LiPingyehasbeengrindinghisinkfornearly80years.Itisdifficulttotellwhetherhehasbeengrindinginkortheinkhasbeengrindinghim.ThisfamouscontemporaryChinesetraditionalpainterhasexperiencedinnumerablefrustrationsandsufferingsoflife.

简介：摘要白介素17（IL-17）在调解中性粒细胞补充和粒细胞生成方面起着重要作用，同时IL-17还是重要的促炎因子可诱导其他细胞因子和组织降解酶的产生，提高一些细胞因子的功能。因此IL-17扮演着双重角色。本文就IL-17在肺炎中的作用的相关研究进展加以综述。

简介：AcupointShousanli(LI10)isalsocalledShangsanli,Guixie,locatesattheradialaspectofthebackoftheforearm,2cunbelowQuchi(LI11),onthelinejoiningYangxi(LI5)andQuchi(LI11).Shousanli(LI10)wasfirstlyrecordedinZhenJiuJiaYiJing(A-BCanonofAcupunctureand

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简介：ByapplyingtheHeavisidefunction,theequationsgoverninglaminatedplatespossess-ingspatiallydistributedpiezoelectricpatcheshavebeenestablished.Basedontheseequations,staticshapecontroloflaminatedplatesisdiscussed.Byusingageneticandcollocationalgorithm,theopti-mallocationsandscalesofthesepiezoelectricpatcheshavebeenselected.Numericalexamplesarepre-sentedtoillustratetheefficiencyofthealgorithmandthepiezoelectricactuators.

简介：MotivatedbyITER(theInternationalThermonuclearExperimentalReactor),researchonamagneticshieldagainstastrongfieldhasbeencarriedout.Inthispaper,acylindricmagneticshieldisstudiedbyusingthefiniteelementmethodwithanonlinearmagnetizationcurve.Thegeometricalaspectsofshieldingperformanceareidentifiedandcorrespondingsuggestionsforapplicationareprovided.Amongthem,theeffectsoftheedgeandcoverthicknesshavenotbeenmentionedelsewheretoourknowledge.