Video: Mnist cov ntaub ntawv hom ntawv yog dab tsi?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
MNIST (Mixed National Institute of Standards and Technology) database yog dataset rau tus lej sau tes, faib los ntawm Yann Lecun's THE MNIST DATABASE ntawm tes sau tus lej lub vev xaib. Cov dataset muaj khub, "tus lej sau tus lej" thiab "label". Tus lej nyob ntawm 0 txog 9, txhais tau tias 10 tus qauv hauv tag nrho.
Hauv qhov no, Mnist cov ntaub ntawv khaws cia li cas?
COV FORMATS RAU LUB MNIST DATABASE Txhua tus lej hauv cov ntaub ntawv yog khaws cia nyob rau hauv MSB thawj (high endian) hom siv los ntawm feem ntau tsis yog-Intel processors. Cov neeg siv ntawm Intel processors thiab lwm yam low-endian tshuab yuav tsum tig lub bytes ntawm header. Cov txheej txheem kev cob qhia muaj 60000 piv txwv, thiab qhov kev sim teeb tsa 10000 piv txwv.
Tom qab ntawd, lo lus nug yog, Mnist sawv rau dab tsi? Hloov kho National Institute of Standards and Technology
Cov lus nug tseem yog, qhov loj ntawm Mnist dataset yog dab tsi?
Cov MNIST cov ntaub ntawv yog ib qho lus luv luv uas sawv cev rau Lub Tsev Haujlwm Hloov Kho Tebchaws ntawm Cov Qauv thiab Tshuab dataset . Nws yog ib dataset ntawm 60,000 me me square 28 × 28 pixel grayscale dluab ntawm tes sau ib tug lej ntawm 0 thiab 9.
Nws siv sijhawm ntev npaum li cas los cob qhia Mnist?
Qhov yooj yim version ntawm feedforward net rau MNIST (uas muaj tseeb ua tiav qis dua 5% tus nqi yuam kev) yog qhov yooj yim rau kev siv. Nws yuav siv sij hawm txog 2-4 teev ntawm coding thiab 1-2 teev ntawm kev cob qhia yog ua tiav hauv Python thiab Numpy (piv txwv li kev nkag siab tsis zoo pib pib thiab cov txheej txheem zoo ntawm hyperparameters).
Pom zoo:
Cov ntaub ntawv hom thiab cov qauv ntaub ntawv yog dab tsi?
Cov qauv ntaub ntawv yog ib txoj hauv kev piav qhia txog ib txoj hauv kev los npaj cov ntaub ntawv kom ua haujlwm andalogrithms tuaj yeem siv tau yooj yim dua. Ib hom ntaub ntawv piav qhia txog cov ntaub ntawv uas txhua tus sib koom ua ke. Piv txwv li tus lej cov ntaub ntawv hom piav qhia txhua tus lej uas lub khoos phis tawj tuaj yeem ua tau
Dab tsi yog hom ntaub ntawv thiab cov ntaub ntawv sib txawv?
Qee cov ntaub ntawv muaj xws li cov lej, cov lej ntab, cov cim, cov hlua, thiab cov arrays. Lawv kuj tseem yuav yog hom tshwj xeeb, xws li hnub tim, timestamps, booleanvalues, thiab varchar (tus cwj pwm sib txawv) cov qauv
Dab tsi yog lub hom phiaj ntawm delimiters nyob rau hauv cov ntawv sau npe ob hom ntawv cov ntaub ntawv delimiters?
Cov ntaub ntawv delimited yog cov ntawv nyeem siv los khaws cov ntaub ntawv, uas txhua kab sawv cev rau ib phau ntawv, tuam txhab, lossis lwm yam, thiab txhua kab muaj cov teb sib cais los ntawm tus lej
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
Dab tsi yog cov teeb meem ntawm kev tswj cov ntaub ntawv hauv cov ntaub ntawv ib txwm muaj?
Nyob rau tib lub sijhawm, qhov kev tswj hwm cov ntaub ntawv ib puag ncig tsim teeb meem xws li cov ntaub ntawv rov ua dua thiab tsis sib xws, cov kev pab cuam-cov ntaub ntawv dependence, inflexibility, tsis muaj kev ruaj ntseg, thiab tsis muaj cov ntaub ntawv sib qhia thiab muaj