简介:Geometriccomputingisanimportanttoolindesignandmanufacturingandinarts.Conventionally,geometriccomputingistakenbyalgebraiccomputing.Thevividintuitionofobjectsinvisualizationislostinnumericfunctions,whichishoweververyusefultohumancognitionaswellasemotion.Inthispaper,weproposedaconceptandtheoryofgeometricbasis(GB)asthesolvingcellforgeometriccomputing.EachGBrepresentsabasicgeometricoperation.GBworksasbothexpressingandsolvingcelljustliketheconceptofbasisinlinearalgebrabywhicheveryelementofthevectorspacecanbeexpressed.For3Dproblems,withaprocedureofaprojectionsreduction,theproblemcanbereducedtoplaneandthereductionfunctioncanbedesignedasaGB.AsequenceofGBcanconstructahigherlayerGB.Then,bythetraversaloftree,asequenceofGBisgotandthissequenceisjusttheconstructionprocessandalsothesolutionofthisgeometricproblem.
简介:Thispaperproposesanewcellintuitionsimulationmethodwhichisacombinationofintuitivesimulationcalculationmethodandtheoperationofbinaryimage,andapplieditintheinnovationofthegraphicdesignprocess.Firstofall,westudyhowtoexpressavarietyofgraphics,andestablishthedefinitionofcellintuitivemodel,workoutthecellintuitiveoperationprocessandmanynewcellularoperatorssuchasavarietyofmatrixblockscrossoveroperator,avarietyofmatrixblocksmutationoperator,matrixblocksreplaceoperator,matrixblockscompressionoperator,matrixblocksextensionoperator.Bychoosingtwoormorecellsandselectingtheartificialselectionorfitnessselection,wecansetupandvisualizethedesignandpickthebestdesignresults.Finally,validationismadeonthisalgorithmbyanexample,andainnovationgraphicisalsorepresented.
简介:每个创造都来源于对超越过去的强烈渴望;对完美、独一无二的梦想的不懈追求;对分享激情,制造出久经时光磨砺的精品的无止境的欲望……这些褒扬加在S.T.Dupont这个充满着贵族梦想的品牌上一点也不为过,一百多年来。S.T.Dupont-直如此努力着。S.T.Dupont音译为“都彭”.其身上倔强地流着法国人的血液——视高尚为生命的血液。
简介:人们对速度和带宽的需求似乎从未停止,当许多公司正试图不断满足这种需求时,大多数公司意识到他们现有的基础设施不足以应付每月每年的增长数量。尤其是以太网,随着其越来越受人们的欢迎,继续以10倍的数据速度增量发展。当1000BASE-T接口在交换机、服务器甚至桌面PC上频繁使用时,用于双绞电缆布线的10Gb以太网标准(称作10GBASE-T)已处于开发阶段。
简介:新的戴尔PowerVault136T磁带存储系统基于新兴的线性磁带开放(LTO)标准,定位于那些有着大量数据备份需求的商业客户。PowerVault136T起价为人民币130,156元,拥有内置的系统管理诊断功能,支持高达14.4TB的存储容量、72个LTO磁鼓以及6个LTO磁带驱动器。为提供更快的速度和更多的用途,
简介:Stationkeepingmode(SKM)forAttitudeOrbitControlSubsystem(AOCS);itisanoperationalapproachregardingtheattitudedynamicscontrol.Theessentialfeaturesofthedesignmethodologyisresearchingthebasictheoryandthenafterwards,makeaniterativedesignapproachusingsomepremise/assumptions,implementingthesystemsimulationthroughtheSimulinkMatlabsoftwarepackage,designingtherequiredcontrollers,monitorandanalyzingtheresponsesuntilthedesigngivethebestresultswithintherangerequired.Firstlythethrusterconfigurationisdesignedtoacquiretheparametersofthetorqueonthesatellite.Next,thecontrollersarebasedonthewellknownPIDcontrollaw.ControllersoptimizetheattitudeandareusedduringthemaneuversforSKM.Afterwardsthesimulationresultsaregiven,andpresentedtodemonstratetheperformanceandvalidityoftheAOCSdesignapproach.FinallythesimulationresultsdemonstratethatalltherequirementswereaccomplishedandtheStationKeepingModewassuccessfullydesigned.