Määritelmä
Three-dimensionalspacereferstothespacewherethepositionofapointisdeterminedbythreecoordinates,withlength,widthandheight.
Spaceandtimearetheexistenceformsofmovingmatter.Spaceistheextensionoftheexistenceofmatter,andtimeisthecontinuityandsequenceofthemovementofmatter.Likematter,spaceandtimeareobjectiveexistencesthatdonotdependonhumanconsciousnessandareeternal.Spaceandtimeareinseparablefromthemovingmatter.Thereisnospace-timeseparatedfromthemovementofmatter,andthereisnomatterthatdoesnotmoveintime-space.Buttimeandspacedescriptionandmeasurementarerelative.Thephysicalmotionofnaturalsciencedescribesspaceandtimebyselectingareferenceframe.Thethree-dimensionalspacedirectlyreflectstheintuitivethinking'sgraspoftheshape,size,distance,depth,directionandothercharacteristicsofexternalobjects.
Atlasof StringTheoryModels (6 kuvaa)
Johdanto
Weavesomerubbercordsintoanetaccordingtothepatternofwarpandweft,andflattenit.,Wecanapproximateitasatwo-dimensionalplane,andthenputasmallballonthenet,andtherubbernetisrecessedunderthegravityoftheball,whichformsathree-dimensionalspace.
"Dimension"heremeansdirection.Thelinearpatternestablishedbyonedirectionisaone-dimensionalspace,andtheone-dimensionalspaceisunidirectional.Theplanemodelestablishedbytwodirectionsisatwo-dimensionalspace,andthetwo-dimensionalspaceisbidirectional.Inthesameway,thethree-dimensionalspaceisthree-dimensionalandthree-dimensional,whichisestablishedbytheinfiniteextensionofthreedirections.
The"four-dimensionalspace"mentionedindailylifemostlyreferstotheconceptof"four-dimensionalspace-time"mentionedbyEinsteininhis"GeneralRelativity"and"SpecialTheoryofRelativity."AccordingtoEinstein'sconcept,ouruniverseiscomposedoftimeandspace.Therelationshipbetweentimeandspaceisthatatimeaxisisaddedtothestructureofspacecomparedtothethreeaxesoflength,width,andheightofordinarythree-dimensionalspace,andthistimeaxisisanaxisofimaginaryvalues.
Neliulotteinen tila on ajan ja tilan käsite. Yksinkertaisesti sanottuna mitä tahansa neliulotteista avaruutta voidaan kutsua "neliulotteiseksi avaruudeksi".
AccordingtoEinstein'stheoryofrelativity:thethree-dimensionalspacewefaceinourlivesplustimeconstitutetheso-calledfour-dimensionalspace.Sincethetimewefeelontheearthisveryslow,wewillnotobviouslyfeeltheexistenceoffour-dimensionalspace,butonceweboardaspacecraftorreachtheuniverse,thespeedofourframeofreferencebeginstoincreaseorbegintoapproach.Atthespeedoflight,wecanfindthechangesintimecomparatively.Thereisapotentialplacehere,andtheenergyofmatterwillchangewiththechangeofspeed.Therefore,thechangeandcontrastoftimearebasedonthespeedofmatterastheframeofreference.Thisiswhytimeisoneoftheelementsoffour-dimensionalspace.
Sovellus-3D-tekniikka
3DTV
3DistheabbreviationofThree-Dimensional,whichmeansthree-dimensionalgraphics.Afterbeingcultivatedinthemarketin2010,3DTVhasnotonlyexceeded80%ofconsumers'awareness,butitstechnologyhasbecomeincreasinglymature,anditspriceshavebecomemorecommonplace.Withtheincreasingpriceof3DTVsandtheimprovementof3Dtechnology,thesalesof3DTVswillcontinuetorise,and3Dfunctionswillbecomethestandardconfigurationofmainstreammid-to-high-endcolorTVs.ManufacturerssuchasSharp,LG,Konka,Sony,Samsung,Skyworth,TCL,andChanghonghavelaunchednew3DTVs.3DTVshavethemajesticmomentumof"unifyingtheriversandlakes".Basically,domesticandforeignTVbrandshaveproduced3DTVs.ThetrialbroadcastofChina's3Dpilotchannelhasbeenlaunchedinmorethan180regionsacrossthecountry,openingupthemarketfor3DTVs.
Chromatic3D-tekniikka
Anaglyph3Dusesglassescomposedoftwocomplementarycolorfilters,whichcanbered-blue,red-greenorred-cyanfiltersColor3Dglasses,takingredandbluecolorfilterglassesasanexample,thecontentacquisitionendusestwocameraswithredandbluefiltersatthefrontofthelenstoshootthesamesceneimage,andgetaredimagesignalandablueimagesignal.Thetwosignalsaresuperimposedintoonesignalandsenttothereceivingenddisplaytodisplayredandblueimages.Theleftandrightglassesofthestereoglassesareredorbluefilters,whichmakethelefteyewearingtheredfilteronlyseetheredimage,andtherighteyewearingthebluefiltercanonlyseetheblueTheimagesarefusedbythebraintoformstereovision.Thiskindof3DTVimagingtechnologyhasgoodcompatibilityandwasoncealltherageinthefieldof3DTVtechnology.However,theexistingproblemsarealsoveryobvious:thecolorinformationisgreatlylostduetotheuseoffilterstowatchTVimages;anotherproblemistheinterferencecausedbythe"cross-color"phenomenonofthecolorTVitself;atthesametime,duetotheincidentspectrumoftheleftandrighteyesInconsistent,easytocausevisualfatigue.
Polarisaatio3D-tekniikka
Polarization(Polarization)3Dtechnologyisalsocalledpolarization3Dtechnology.Polarizationstereoglassesusepolarizationdirectionsperpendiculartoeachotherfortheleftandrighteyes.Lenses,onelensusesverticalpolarization,andtheotherlensuseshorizontalpolarization.Thedisplayprojectsthecorrespondingpolarizedlight,sothatthetwoeyescanviewtheleft-viewandright-viewimagesrespectively,andthebrainmergesintoastereoscopicimage.Thedisadvantageofthismethodisthatwhentheviewer'sheadistilted,thepolarizedlenscannotfilteroutthepolarizedlightorthogonaltoit,andtheimageofoneviewleaksintotheotherview,andtheviewerwillfeeluncomfortable.OnLCDTVs,theapplicationofpolarized3DtechnologyrequiresTVstohavearefreshrateof240Hzorhigher.
Shutter3D-tekniikka
Shutter3D-tekniikka,EnglishisActiveShutter3D,usedwithactiveshutter3Dglasses.Thiskindof3DtechnologyisthemostwidelyusedonTVsandprojectors,withrelativelymoreresources,andexcellentimageeffects.Itispraisedandadoptedbymanymanufacturers,butitsmatching3Dglassesaremoreexpensive.The3DTVslaunchedbybrandsincludingLG,Samsung,Panasonic,andSkyworthalluseshutter3Dtechnology.
Althoughitiscommonlyused,theshuttertypealsohassomeshortcomings:
First,theproblemofglasses,firstofall,glassesneedtobeequippedwithbatteries,butglassesmustbeworntoappreciateForTVprograms,theelectromagneticwavesemittedwhilethebatterygeneratescurrentwillgenerateradiation,whichwillinduceunexpecteddiseases.
Second,theproblemofscreenflickerandtheflickerof3Dglassesismainlyreflectedinshutter-type3Dglasses.Itneedstobeopenedandclosed50/60timesperminute.Evenifitissofast,theuser'sglassescanstillfeelit.Ifyouwatchforalongtime,theburdenontheeyeballwillincrease.
3.Thebrightnessisgreatlydiscounted.Afterwearingthiskindof3Dglasseswithblackfilm,eacheyecanactuallyonlygethalfofthelight,sotheshuttertypeislikewatchingTVwithsunglassesThesame,andtheeyesgettiredeasily.
Vilkkumaton 3D-tekniikka
Vilkkumattomuuden periaate
Thenon-flashing3DTVmethodisthemostnaturalwaythatisclosesttoouractualthree-dimensionalexperience.Justlikeenjoyinglively3Dimagesinamovietheater,youcanwatchtwoimagesatthesametime.Stickaspecialfilmthatseparatestheleftandrightimagesonthesurfaceofthe3DTVandglasses.TheleftandrightimagesareseparatedbytheTVandsenttotheglassesatthesametime.Throughthefilteringoftheglasses,theseparatedleftandrightimagesaresenttoeacheye,andthebraincombinesthetwoimagestomakepeoplefeel3Dstereoscopic.
Characteristicsofnon-flashing3D:Butitcanalsobebasedontheperspective.Non-flashing3Disnotaproblematallwhenviewingwithintherecommendedaudio-visualdistance.Forexample,apartfromstanding,sittingorwatchingTVinaveryabnormalposturewithinonemeter,thereisnoproblemwhenwatching3DTVwithintherecommendeddistanceforviewingandlistening.
Theonlydisadvantageisthatwhenplaying1080p,itisonly540p.Becausethepicturequalityishalved,itwillalsobringinsignificanteffects.
Neliulotteinen avaruus
Theconnectionbetweenthree-dimensionalspaceandfour-dimensionalspace
Neliulotteinen tila on ajan ja tilan käsite. Yksinkertaisesti sanottuna mitä tahansa neliulotteista avaruutta voidaan kutsua "neliulotteiseksi avaruudeksi".However,mostofthe"four-dimensionalspace"mentionedindailylifereferstothe"four-dimensionalspace-time"mentionedbyEinsteininhis"GeneralRelativity"and"SpecialTheoryofRelativity."AccordingtoEinstein'sconcept,ouruniverseiscomposedoftimeandspace.Therelationshipbetweentimeandspaceisthatinthestructureofspace,thereisanadditionaltimeaxisbeyondthethreeaxesoflength,width,andheightofordinarythree-dimensionalspace,andthistimeaxisisanaxisofimaginaryvalues.
Thefour-dimensionalspacementionedhereisobviouslydifferentfromthefour-dimensionalspace-timereferredtobythetheoryofrelativity.Theso-calledfour-dimensionalspace-timereferstothelackofdimensionalspaceandone-dimensionaltimeinharmonytoformacomplex.Thetheoryofrelativitybelievesthattimeandspaceareinseparable.,Aredifferentpartsofawhole.Thefour-dimensionalspacementionedherereferstothespacewithouttime.Itisbelievedthatinadditiontothefamiliarthree-dimensionalspaceintheuniverse,thereisalsoaone-dimensionalspacethatpeopledonotknowabout.""and"Gao"reallyexist,butitisextremelydifficulttodetect,sothatthecurrentextremelypowerfulandextremelycomplexphysicsexperimentshavenotbeenfound.AccordingtoEinstein'stheoryofrelativity:thethree-dimensionalspacewefaceinlifeplustimeconstitutestheso-calledfour-dimensionalspace.Sincethetimeweperceiveontheearthisveryslow,wewillnotobviouslyfeeltheexistenceoffour-dimensionalspace,butonceweboardtheNingZhouspacecraftorreachtheuniverse,thespeedofourframeofreferencewillstarttoincreaseorWhenstartingtoapproachthespeedoflight,wecanfindthechangeintimebycomparison.Ifyousailinaspacecraftthatisclosetothespeedoflightperhour,yourlifewillbemuchlongerthanthatofapersononearth.Thereisapotentialplacehere,andtheenergyofmatterwillchangewiththechangeofspeed.Therefore,thechangeandcontrastoftimearebasedonthespeedofmatterastheframeofreference.Thisiswhytimeisoneoftheelementsoffour-dimensionalspace.
Thedifferencebetweenthree-dimensionalspaceandfour-dimensionalspace
Three-dimensionalEuclideanspacehasonlyonedifferentialstructure,whilefour-dimensionalEuclideanspacehasaninfinitevarietyofdifferentialstructures.Three-dimensionalspacereferstoathree-dimensionalspacewithlength,width,andheight.Thefour-dimensionalspaceusuallyreferstothestateofanobjectwithathree-dimensionalspaceduringmovement,thatis,athree-dimensionalshapewithlength,width,andheight.Themovementprocessalsoincludeschangesinthetimedimension.