《(精品)新概念第四册Lesson_14.ppt》由会员分享，可在线阅读，更多相关《(精品)新概念第四册Lesson_14.ppt（15页珍藏版）》请在taowenge.com淘文阁网|工程机械CAD图纸|机械工程制图|CAD装配图下载|SolidWorks_CaTia_CAD_UG_PROE_设计图分享下载上搜索。
1、TheLovell Telescope(/lvl/)isaradiotelescopeatJodrellBankObservatory,nearGoostrey,Cheshireten.柴郡（,inthenorth-westofEngland.Itwasconstructedin1955.Itwasthelargeststeerabledishradiotelescopeintheworldat76.2mindiameter.Viewofthe76metrediameterMark1Aradiotelescope（无线电天文望远镜）atJordrellBanknearManchester,En
2、glandMark 1 A radio telescopeItisnowthethirdlargest,aftertheGreenBanktelescopeinWestVirginia,USA,andtheEffelsbergtelescopeinGermany.Itwasoriginallyknownasthe250ft(76m)telescopeortheRadioTelescope,beforebecomingtheMark I telescopearound1961whenfuturetelescopes(theMarkII,III,andIV)werebeingdiscussed.I
3、twasrenamedtotheLovell Telescopein1987afterBernardLovell,andbecameaGradeIlistedbuildingin1988.JodrellBank:anobservatory(=placefromwhichscientistsstudythestars,etc)inCheshireten.柴郡（英国一郡名）,northwestEnglandLesson14TheButterflyEffectWhydosmallerrorsmakeitimpossibletopredicttheweathersystemwithahighdegre
4、eofaccuracy?Butterfly EffectButterflyBeyondtwoorthreedays,theworldsbestweatherforecastsarespeculative,andbeyondsixorseventheyareworthless.TheButterflyEffectisthereasonForsmallpiecesofweather-andtoaglobalforecaster,smallcanmeanthunderstormsandblizzards-anypredictiondeterioratesrapidlyErrorsanduncerta
5、intiesmultiply,cascadingupwardthroughachainofturbulentfeartures,Thunderstorm and Blizzardfromdustdevilsandsquallsuptocontinent-sizeeddiesthatonlysatellitescansee.Dust devileddysquallsatelliteThemodernweathermodelsworkwithagridofpointsoftheorderofsixtymilesapart,andevenso,somestartingdatahastobeguess
6、ed,A grid of pointssincegroundstationsandsatellitescannotseeeverywhereButsupposetheearthcouldbecoveredwithsensorsspacedonefootapart,Weather sensorrisingatone-footintervalsallthewaytothethetopoftheatmosphere.Supposeeverysensorgivesperfectlyaccuratereadingsoftemperature,pressure,humidity,andanyotherqu
7、antityameteorologistwouldwantMeterologistPreciselyatnoonaninfinitelypowerfulcomputertakesallthedataandcalculateswhatwillhappenateachpointat12.01,then12.02,then12.03ThecomputerwillstillbeunabletopredictdatawhetherPrinceton,NewJersey,willhavesunorrainonadayonemonthawayAtnoonthespacesbetweenthesensorswillhidefluctuationsthatthecomputerwillnotknowabout,tinydeviationsfromtheaverageBy12.01,thosefluctuationswillalreadyhavecreatedsmallerrorsonefootawaySoontheerrorswillhavemultipliedtotheten-footscale,andsoonuptothesizeoftheglobe.