2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
3. Nyob rau hauv hom multiplexing lub sij hawm slots yog preassigned rau qhov chaw thiab tsau. Piav: TDM yog sijhawm faib multiplexing.
Nyob rau hauv qhov TDM qhov twg nkim yog tias tsis muaj ntaub ntawv xa mus?
2. Asynchronous lub sij hawm faib multiplexing. Hauv synchronous TDM yog tias lub davhlau ya nyob twg tshwj xeeb tsis muaj cov ntaub ntawv xa mus rau lub sijhawm tshwj xeeb, qhov sib txuas hauv ib lub thav duab yog nkim lossis qhov khoob khoob yuav raug xa mus. Asynchronous TDM lossis statistical TDM yog siv los kov yeej qhov nyuaj no.
Vim li cas synchronous TDM tsis ua haujlwm?
Qhov tsis zoo tshaj plaws ntawm synchronous lub sij hawm faib multiplexing yog tias lub peev xwm tag nrho ntawm qhov txuas yuav tsis siv. Yog tias lub cuab yeej txuas nrog tsis xa cov ntaub ntawv, nws lub sijhawm teem sijhawm yuav khoob thiab ib feem ntawm kev sib txuas bandwidth yuav raug nkim.
Dab tsi yog interleaving hauv TDM?
Ntawm multiplexing sab, raws li qhov hloov pauv qhib rau pem hauv ntej ntawm kev sib txuas, qhov kev sib txuas muaj lub sijhawm xa ib chav mus rau txoj kev. Txoj kev no hu ua interleaving. Nyob rau sab demultiplexing, raws li qhov hloov pauv qhib rau pem hauv ntej ntawm kev sib txuas, qhov kev sib txuas ntawd muaj lub sijhawm kom tau txais ib chav los ntawm txoj kev.
Yuav ua li cas muaj ntau hom kev sib tw ua ke?
Muaj ntau ob hom ntawm multiplexers, namely analog thiab digital. Lawv ntxivmuab faib ua Frequency Division Multiplexing (FDM), Wavelength Division Multiplexing (WDM), thiab Time Division Multiplexing (TDM).
Pom zoo:
Lub sijhawm twg cov txheej txheem yog cov ntaub plaub ncaj ncaj thiab combed?
Tom qab dyeing txheej txheem, cov fibers yog ncaj, dov thiab combed rau hauv yarns. Thaum txheej txheem twg yog wool fibers? txheej txheem no yog hu ua shearing. Cov plaub hau muab woolen fibers uas tau ua tiav kom tau cov xov paj woolen.
Lub sijhawm nyob qhov twg ntawm lub sijhawm teem sijhawm?
kab kab rov tav ntawm lub rooj ntu ntu yog hu ua ntu ntu. Lub sijhawm nyob rau ntawm lub sijhawm nyob qhov twg? Ib lub sijhawm yog kab kab rov tav ntawm lub rooj ntu ntu. Muaj xya lub sij hawm nyob rau hauv lub sij hawm ntawm lub sij hawm, nrog txhua tus pib ntawm sab laug.
Dab tsi yog txheej txheej txheej txheem nyob rau hauv lub ntiaj teb?
Lub neej muaj txheej txheem ntawm lub ntiaj teb yog the Biosphere. Lub neej muaj dabtsi? Cov kabmob lub neej yog qhov tseem ceeb ntawm lub sijhawm ntev ntawm cov kabmob tuaj yeem xav tau ua raws li qhov xav tau hauv kev ua haujlwm ua ntej tau teev tseg.
Cov txheej txheem huab cua twg muaj txheej txheej ozone?
Feem ntau atmospheric ozone yog concentrated nyob rau hauv ib txheej nyob rau hauv the stratosphere, li ntawm 9 txog 18 mais (15 mus rau 30 km) saum lub ntiaj teb nto (saib daim duab hauv qab). Ozone yog ib qho molecule uas muaj peb lub atoms oxygen.
Rau cov txheej txheem lossis cov txheej txheem?
Cov txheej txheem yog feem ntau yog ntau lub npe hais txog cov qauv uas tuaj yeem txiav txim siab. Nws cov lus yog cov qauv, tab sis cov pov thawj qhia tau tias cov txheej txheem feem ntau raug siv los ua cov lus thiab ntau ntau, zoo li cov ntaub ntawv thiab cov txheej txheem thiab lawv cov lus siv tsawg dua cov ntaub ntawv thiab cov txheej txheem.
