简介：

简介：该型测量组合导航系统是在装船使用４年取得较好效果的情况下，于１９９３年２月通过部级技术鉴定，本文概要介绍了主要功能、技术途径、硬件设计特点、软件设计概况及数据处理技术，并综述了海上试验与试用情况等技术资料。

简介：Synchronousgammaoscillationsarebelievedtoplayaprominentroleintheinformationprocessingofbiologicalneuralsystems.Experimentalobservationshavefoundthatthefrequencyandpowerofgammaoscillationsintheprimaryvisualcortex(V1zone)areregulatedbytheilluminationcontrastofvisualstimulus.However,theunderlyingmechanismofhowthesynchronousoscillationsdependontheilluminationcontrasthasnotbeenwellexplained.Weproposealocalexcitatory/inhibitory(E/I)neuronalnetworkofintegrate-and-fire(IAF)neuronswiththedifference-of-Gaussians(DOG)receptivefieldtounveilthismechanism.Simulationresultsdemonstratethatthehighertheilluminationcontrast,thehigherthefrequencyofgammaoscillations.Thepowerofgammaoscillationsalsoincreaseswiththeincreaseofilluminationcontrast.Theseresultsareconsistentwiththeexperimentalfindings.

简介：ＡＳＵＰＰＬＥＭＥＮＴＡＲＹＳＴＵＤＹＯＦＡＮＩＳＯＴＲＯＰＩＣＰＬＡＳＴＩＣＦＩＥＬＤＳＡＴＡＲＡＰＩＤＬＹＰＲＯＰＡＧＡＴＩＮＧＰＬＡＮＥ－ＳＴＲＥＳＳＣＲＡＣＫ－ＴＩＰ（Ｉ）ＬｉｎＢａｉｓｏｎｇ（林拜松）（ＲｅｃｅｉｖｅｄＪｕｌｙ１５．１９９４...

简介：Inliterature,nonlineartravelingwavesinelasticcircularrodshaveonlybeenstudiedbasedonsinglepartialdifferentialequation(pde)models,andhereweconsidersuchaproblembyusingamoreaccuratecoupled-pdemodel.WederivetheHamiltonianfromthemodelequationsforthelongfinite-amplitudewaveapproximation,analyzehowthenumberofsingularpointsofthesystemchangeswiththeparameters,andstudythefeaturesofthesesingularpointsqualitatively.Variousphysicallyacceptablenonlineartravelingwavesarealsodiscussed,andcorrespondingexamplesaregiven.Inparticular,wefindthatcertainwaves,whichcannotbecourltedbythesingle-equationmodel,canarise.