Cov txheej txheem:
- Muaj ntau hom kev sib txawv ntawm lub sijhawm, yog li cia peb tshawb xyuas qhov yooj yim tshaj plaws
Video: Lub sij hawm complexity nyob rau hauv cov ntaub ntawv qauv yog dab tsi?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Lub sijhawm nyuaj ntawm ib qho algorithm quantifies tus nqi ntawm sij hawm coj los ntawm ib qho algorithm los khiav raws li kev ua haujlwm ntawm qhov ntev ntawm cov tswv yim. Ib yam li ntawd, Space nyuaj ntawm ib qho algorithm quantifies tus nqi ntawm qhov chaw los yog lub cim xeeb coj los ntawm ib tug algorithm los khiav raws li ib tug muaj nuj nqi ntawm qhov ntev ntawm cov tswv yim.
Kuj paub yog, Lub Sijhawm complexity txhais li cas?
Hauv computer science, lub lub sij hawm complexity yog lub computational complexity uas piav txog tus nqi ntawm sij hawm nws yuav siv sij hawm los khiav ib algorithm. Yog li, tus nqi ntawm sij hawm coj thiab tus naj npawb ntawm cov haujlwm theem pib ua los ntawm algorithm yog coj mus rau qhov sib txawv ntawm qhov feem ntau qhov tsis tu ncua.
Tsis tas li ntawd, lub sij hawm complexity xam tau li cas? Yog li peb tuaj yeem sib faib lossis faib los ntawm qhov xwm txheej tas mus li kom tau mus rau qhov kev qhia yooj yim tshaj plaws. Yog li 2N tsuas yog N. Qhov feem ntau metric rau xam lub sij hawm complexity yog Big O notation. Qhov no tshem tawm tag nrho cov yam tsis tu ncua kom cov khiav sij hawm tuaj yeem kwv yees nyob rau hauv kev sib raug zoo rau N raws li N mus txog infinity.
Kuj paub, hom kev sib txawv ntawm lub sijhawm nyuaj yog dab tsi?
Muaj ntau hom kev sib txawv ntawm lub sijhawm, yog li cia peb tshawb xyuas qhov yooj yim tshaj plaws
- Lub sij hawm tsis tu ncua: O(1)
- Linear Sijhawm Complexity: O(n)
- Lub Sijhawm Logarithmic Complexity: O (log n)
- Lub Sij Hawm Quadratic Complexity: O (n²)
- Exponential lub sij hawm Complexity: O(2^n)
Yuav ua li cas yog lub sij hawm complexity ntawm ib tug algorithm piav nrog piv txwv?
Nkag siab Notations of Lub sij hawm nyuaj nrog Piv txwv Nws qhia qhov siab tshaj plaws yuav tsum tau los ntawm ib qho algorithm rau tag nrho cov input nqi. Nws sawv cev qhov xwm txheej phem tshaj plaws ntawm ib qho algorithm lub sij hawm complexity . Omega (qhia) yog cov txheej txheem ntawm kev ua haujlwm uas loj hlob sai dua lossis ntawm tib tus nqi raws li kev qhia.
Pom zoo:
Dab tsi yog lub sij hawm ncua sij hawm relay uas siv lub sij hawm RC Circuit Court?
Kev tsim tshiab ntawm lub sij hawm ncua relays siv hluav taws xob circuits nrog resistor-capacitor (RC) tes hauj lwm los tsim lub sij hawm ncua, ces energize ib txwm (instantaneous) electromechanical relay coil nrog cov hluav taws xob Circuit Court cov zis
Qhov txawv ntawm lub sij hawm lapse thiab lub sij hawm lapse yog dab tsi?
Ib qho hyperlapse, ntawm qhov tod tes, tsis muaj kev txwv li no: 'Nws ua rau lub koob yees duab txav mus rau ntau qhov deb,' Tompkinson hais. Hauv lwm lo lus, hyperlapse zoo ib yam li lub sijhawm ua haujlwm, tab sis nrog ntau qhov kev sib tw
Yuav ua li cas koj xam lub sij hawm turnaround nyob rau hauv cov txheej txheem teem sij hawm?
Lub sij hawm tig tawm = Lub Sijhawm Tawm - Lub Sijhawm Tuaj Txog Piv txwv li, yog tias peb coj thawj zaug Ua Haujlwm Pabcuam algorithm, thiab qhov kev txiav txim tuaj txog ntawm cov txheej txheem yog P1, P2, P3 thiab txhua tus txheej txheem yog noj 2, 5, 10 vib nas this
Dab tsi yog qhov sib txawv ntawm cov qauv siv nyob rau hauv cov ntaub ntawv ntawm cov khoom oriented qauv?
Cov qauv tseem ceeb ntawm cov qauv uas siv rau hauv cov khoom siv yog: Siv cov qauv qauv, Cov qauv qauv (zoo li qub) cov qauv, Cov qauv coj tus cwj pwm (dynamic) khoom qauv
Koj txhais li cas compile lub sij hawm tas li hauv Java Dab tsi yog siv compile lub sij hawm tas li?
Compile-time constants thiab variables. Cov ntaub ntawv Java hais tias: Yog hais tias ib hom thawj zaug los yog ib txoj hlua txhais tau tias yog qhov tas li thiab tus nqi raug paub thaum lub sij hawm sau, lub compiler hloov lub npe tas li txhua qhov chaw hauv cov cai nrog nws tus nqi. Qhov no yog hu ua compile-time constant