无线电子门铃设计外文文献.pdf

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无线电子门铃设计外文文献--第1页

WirelessCommunications

Moderncomputertechnology,industrialrevolution,theworldeconomy

fromthecapitalintotheeconomytoknowledgeeconomy.Fieldinthe

electronicworld,fromthe20thcenturyintotheeraofradiotocomputer

technologyinthe21stcenturyasthecenteroftheintelligentmoderneraof

electronicsystems.Thebasiccoreofmodernelectronicsystemsare

embeddedcomputersystems(referredtoasembeddedsystems),whilethe

microcontrolleristhemosttypicalandmostextensiveandmostpopular

embeddedsystems.

Fist,radiohascreatedgenerationsofexcellenceintheworld.

Fiftiesandsixtiesinthe20thcentury,themostrepresentativeofthe

advancedelectronic,technologyiswirelesstechnology,includingradio

broadcasting,radio,wirelesscommunications(telegraph),AmateurRadio,

radiopositioning,navigationandothertelemetry,remotecontrol,remote

technology.Earlythattheseelectronictechnologyledmanyyoungpeople

intothewonderfuldigitalworld,radioshowwasawonderfullife,the

prospectsforscienceandtechnology.Electronicsbegantoformanew

discipline.Radioelectronics,wirelesscommunicationsbegane-world

journey.Radiotechnologynotonlyasarepresentativeofadvancedscience

andtechnologyatthattime,butalsofrompopulartoprofessionalfieldsof

science,attractingtheyoungpeopleandenablethemtofindalotoffun.Ore

fromthebedsidetothesuperheterodyneradio;reportissuedfromtheradio

amateurradiostations;fromthetelephone,electricbelltotheradiocontrol

model.Becamepopularyouthradiotechnology,scienceandtechnology

educationismostpopularandmostextensivecontent.Sofar,manyofthe

oldergener

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