Video: Daim duab kos ua dab tsi?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
daim duab . ib daim duab geometric, siv los piav qhia txog lej, ntawv pov thawj, thiab lwm yam. ib daim duab kos duab, kos duab, lossis cov phiaj xwm uas piav qhia ib yam los ntawm kev piav qhia nws qhov chaw thiab lawv cov kev sib raug zoo, kev ua haujlwm, thiab lwm yam. ib daim duab lossis daim duab piav qhia lossis piav qhia cov tswv yim, txheeb cais, thiab lwm yam..
Hauv qhov no, lub hom phiaj ntawm daim duab yog dab tsi?
A daim duab yog ib lub cim sawv cev ntawm cov ntaub ntawv siv cov tswv yim pom kev. Daim duab tau siv txij thaum ub, tab sis tau tshwm sim ntau dua thaum lub sij hawm Enlightenment. Qee zaum, cov txheej txheem siv qhov kev pom peb-dimensional uas yog tom qab ntawd muab tso rau ntawm ob sab.
Kuj Paub, cov duab sib txawv yog dab tsi? Cov Tam sim no UML cov qauv hu rau 13 ntau hom kev kos duab : chav kawm, kev ua ub no, yam khoom, siv rooj plaub, ntu ntu, pob, lub xeev, cov khoom siv, kev sib txuas lus, cov qauv sib xyaw, kev sib cuam tshuam, sijhawm, thiab kev xa tawm.
Hais txog qhov no, daim duab qhia li cas?
daim duab . A daim duab yog ib daim duab uas qhia qhov sib txawv ntawm ib yam dab tsi thiab lawv ua haujlwm ua ke li cas. Daim duab rov qab mus rau Greek verb diagraphein, lub ntsiab lus "kom kos tawm los ntawm kab," thiab a daim duab siv kab kos los piav ib yam dab tsi.
Vim li cas ib daim duab tseem ceeb?
A daim duab yog qhov tseem ceeb ntawm daim duab uas sib txuas lus cov ntaub ntawv. Koj tuaj yeem piav qhia cov ntaub ntawv txheeb cais thiab lwm yam tseem ceeb cov ntaub ntawv, zoo li yuav ua li cas ib qho system ua haujlwm, sai thiab tsis tshua muaj kev cuam tshuam ntawm cov peev txheej. Siv a daim duab muaj txiaj ntsig zoo dua li cov txheej txheem piav qhia.
Pom zoo:
Dab tsi yog cov duab kos duab?
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Dab tsi yog qhov sib txawv ntawm cov duab kos duab?
Ib lub koom haum tuaj yeem muaj npe, thiab qhov kawg ntawm lub koom haum tuaj yeem dai nrog cov npe ntawm lub luag haujlwm, cov cim qhia txog kev ua tswv cuab, ntau yam, pom, thiab lwm yam khoom. Muaj plaub hom kev koom ua ke: bi-directional, uni-directional, aggregation (nrog rau kev sib sau ua ke) thiab reflexive