Dab tsi yog dag hauv epidemiology?
Dab tsi yog dag hauv epidemiology?

Video: Dab tsi yog dag hauv epidemiology?

Video: Dab tsi yog dag hauv epidemiology?
Video: dag kuv dab tsi By zoo xyooj 2024, Kaum ib hlis
Anonim

Directed acyclic graphs (DAGs) yog cov duab sawv cev ntawm cov kev xav uas tau siv ntau zuj zus nyob rau niaj hnub no. kab mob sib kis . Lawv tuaj yeem pab txheeb xyuas qhov muaj kev tsis sib haum xeeb rau cov lus nug ntawm tes.

Ib yam li ntawd, nws nug tias Dag txhais li cas?

Hauv computer science thiab lej, ib daim duab qhia acyclic ( DAG ) yog ib daim duab qhia thiab tsis muaj voj voog txuas rau lwm cov npoo. Qhov no txhais tau hais tias nws tsis tuaj yeem hla tag nrho cov duab pib ntawm ib ntug. Daim duab yog ib qho topological sorting, qhov twg txhua qhov ntawm ib qho kev txiav txim.

Ib sab saum toj no, dab tsi yog kev sib tsoo hauv kev sib kis? Hauv kev txheeb cais thiab cov kab zauv ua rau muaj qhov sib txawv yog a sib tsoo thaum nws raug cuam tshuam los ntawm ob lossis ntau qhov sib txawv. Lub npe " sib tsoo " qhia txog qhov tseeb tias nyob rau hauv cov qauv graphical, tus xub taub hau los ntawm kev hloov pauv uas coj mus rau hauv sib tsoo tshwm rau "sib tsoo" ntawm lub node uas yog tus sib tsoo.

Ib yam li ntawd, nws nug, Dag nrog piv txwv li cas?

Daim duab qhia acyclic ( DAG !) yog daim duab qhia uas tsis muaj lub voj voog. Ib tsob ntoo cag yog ib hom tshwj xeeb DAG thiab a DAG yog ib hom tshwj xeeb ntawm cov duab qhia. Rau piv txwv , a DAG tej zaum yuav siv los sawv cev rau cov subexpressions nyob rau hauv lub optimizing compiler.

DAG data structure yog dab tsi?

A DAG yog a cov ntaub ntawv qauv los ntawm computer science uas tuaj yeem siv los ua qauv ntau yam teeb meem. Cov DAG muaj cov hauv qab no: Nodes. Txhua node sawv cev rau qee yam khoom lossis cov khoom cov ntaub ntawv.

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