Video: Vim li cas peb thiaj li khaws cov ntaub ntawv?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Clustering yog tseem ceeb hauv cov ntaub ntawv tsom xam thiab cov ntaub ntawv kev siv mining. Nws yog txoj hauj lwm ntawm kev ua ib pawg ntawm cov khoom kom cov khoom nyob rau hauv tib pab pawg neeg zoo sib xws ntau dua rau cov nyob rau hauv lwm pab pawg neeg ( pawg ).
Nyob rau hauv no hais txog, dab tsi yog lub hom phiaj ntawm cov ntaub ntawv clustering?
Ua pawg yog txoj hauj lwm faib cov pej xeem los yog cov ntaub ntawv taw tes rau ntau pab pawg xws li ntawd cov ntaub ntawv cov ntsiab lus nyob rau hauv tib pab pawg yog ntau zoo ib yam li lwm yam cov ntaub ntawv cov ntsiab lus hauv tib pab pawg dua li cov hauv lwm pab pawg. Hauv cov lus yooj yim, cov aim yog cais pab pawg uas zoo sib xws thiab muab tso rau hauv pawg.
Tsis tas li ntawd, qhov twg yog clustering siv? Ua pawg yog siv hauv kev lag luam segmentation; qhov twg peb sim nplua cov neeg muas zaub uas zoo sib xws txawm hais tias tus cwj pwm los yog cwj pwm, duab segmentation / compression; qhov twg peb sim ua pawg zoo sib xws hauv cheeb tsam ua ke, sau ntawv pawg raws li cov ncauj lus, thiab lwm yam.
Kuj tseem paub yog, lub hom phiaj ntawm kev txheeb xyuas pawg yog dab tsi?
Cov lub hom phiaj ntawm kev txheeb xyuas pawg yog muab cov khoom tso rau hauv pab pawg, lossis pawg , tawm tswv yim los ntawm cov ntaub ntawv, tsis tau txhais ib tug priori, xws li cov khoom nyob rau hauv ib tug muab pawg yuav zoo ib yam rau ib leeg nyob rau hauv ib co kev nkag siab, thiab khoom nyob rau hauv txawv pawg nyiam sib txawv.
Dab tsi yog clustering thiab nws hom?
Ua pawg cov txheej txheem yog siv los txheeb xyuas cov pab pawg ntawm cov khoom zoo sib xws hauv cov ntaub ntawv sib txawv uas tau sau los ntawm kev lag luam xws li kev lag luam, bio-kev kho mob thiab geo-spatial. Lawv txawv hom ntawm pawg cov txheej txheem, suav nrog: cov txheej txheem muab faib. Hierarchical pawg . Qauv-raws li pawg.
Pom zoo:
Vim li cas cov ntaub ntawv tiaj tus tsis zoo dua li cov ntaub ntawv sib raug zoo?
Ib lub rooj ua ntaub ntawv tiaj tus yog qhov tseem ceeb rau kev sau cov ntaub ntawv tsawg. Tab sis cov ntaub ntawv loj loj tuaj yeem ua tsis tau raws li nws siv ntau qhov chaw thiab nco dua li cov ntaub ntawv sib txheeb. Nws kuj yuav tsum tau muab cov ntaub ntawv tshiab ntxiv txhua zaus koj nkag mus rau cov ntaub ntawv tshiab, qhov kev sib raug zoo database tsis
Kuv yuav ua li cas thiaj tsim tau ZIP cov ntaub ntawv nrog ntau cov ntaub ntawv?
Muab ob peb cov ntaub ntawv mus rau hauv ib qho zippedfolder kom yooj yim sib faib ib pawg ntawm cov ntaub ntawv. Nrhiav cov ntaub ntawv lossis nplaub tshev uas koj xav zip. Nias thiab tuav (lossis right-click) cov ntaub ntawv lossis ntawv tais ceev tseg, xaiv (lossis taw tes rau) Xa mus rau, thiab tom qab ntawd xaiv Compressed (zipped) folder
Ntev npaum li cas cov ntaub ntawv tuaj yeem khaws cia hauv cov ntaub ntawv warehouse?
10 xyoo Yog li ntawd, cov ntaub ntawv khaws cia hauv lub tsev khaws ntaub ntawv li cas? Cov ntaub ntawv yog feem ntau khaws cia rau hauv ib lub tsev khaws ntaub ntawv los ntawm cov txheej txheem rho tawm, hloov pauv thiab thauj khoom (ETL), qhov twg cov ntaub ntawv tau muab rho tawm los ntawm qhov chaw, hloov mus rau qhov zoo cov ntaub ntawv thiab ces loaded rau hauv ib lub tsev khaws khoom .
Vim li cas kem taw qhia cov ntaub ntawv khaws cia ua cov ntaub ntawv nkag ntawm disks sai dua li kab qhia cov ntaub ntawv khaws cia?
Kem oriented databases (aka columnar databases) yog qhov tsim nyog rau kev ntsuas kev ua haujlwm ntau dua vim tias cov ntaub ntawv hom ntawv (kem hom) qiv nws tus kheej kom nrawm dua cov lus nug ua - scans, aggregation thiab lwm yam. Ntawm qhov tod tes, kab oriented databases khaws ib kab (thiab tag nrho nws. kab) contiguously
Vim li cas peb thiaj siv cov ntaub ntawv sib raug zoo?
Cov ntaub ntawv sib raug zoo tso cai rau koj kom yooj yim nrhiav cov ntaub ntawv tshwj xeeb. Nws kuj tso cai rau koj txheeb raws li ib daim teb thiab tsim cov ntawv ceeb toom uas tsuas muaj qee qhov chaw los ntawm txhua cov ntaub ntawv. Relational databases siv cov ntxhuav los khaws cov ntaub ntawv