简介：Theangularaccelerationduetothespineffectincreasestheburningrateofsolidpropellantandchangesthemotorperformancebyincreasingtheoperatingpressureanddecreasingtheburningtime.Soitisimportanttoknowthegrainregressiontakenplaceinthesolidpropellantrocketmotorintheaccelerationfield.Thisstudyrepresentsthegrainregressionanalysisoftwo-dimensionalaxis-symmetricstargrainconfigurationofthesolidpropellantrocketmotorwithspininducedaccelerationeffectandpressureeffectonburnrateusinggeometricalandnumericalanalysis.Whiletherocketisspinning,theburnratesoneachpointofthepropellantsurfacearedifferentwithitsradialdistance,accelerationvectorangleandsurfaceslope.Withthedifferentburnratesonthepropellantsurface,weanalyzethepropellantsurfaceperimeterandportarea,andtheseresultsarecomparedwiththoseofconstantburnrateandburnrateaffectedbythechamberpressure.

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简介："Hollowmaskillusion"isanopticalillusionandappearsduetoanerrorintheprocessofreconstructingthethree-dimensionalobjectsfromourtwo-dimensionalretinalimage.Inthispaper,wepresentacomputationalmethodtocreate"Hollowmask"typenewillusionarysolidbycalculatingthehollowstructureanditsshading.ThestraightlineVoronoidiagramforagivenshapeobtainsthethree-dimensionalverticesofthehollowstructureandtheshadingeffectoneachsurfaceiscalculatedundertheassumptionthateachsurfacehasdiffuselyreflectingsurface(Lambertianreflectance).Wealsoshowtwoexamplesofournewillusionarysolidworks.

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简介：One-dimensionalringpowersystemisdiscreditedtoanumberofnodeseachcontainingageneratorwithinternalreactanceandloadbranchofresistanceandreactancewithacertainpowerfactor.Whenadisturbanceoccursatanymachineinthepowersystem,simulativeanalysisisperformedtoverifyhowthevariationofloadpowerfactoraffectingthebehaviorofelectromechanicalwavepropagationbyusingtheMATLABpackage,fromwhichdifferentsituationsarepresentedanddiscussed.Theseresultsshowthetypeofloadhasnoeffectonthebehaviorofelectromechanicalwavepropagation.

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简介：在3D动画制作业界．动画设计者们在制作自然的人物动态效果的同时．一直不断致力于头发的自然表现及相应的动画研究。事实上，表现较为写实的头发效果并不容易。在第一部分中，我们将学习Maya中的头发制作．并学习利用PaintEffect表现动画效果的方法。