2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Tus kwv yees yog qhov tshwj xeeb ntawm kev txheeb cais, tus lej suav los ntawm tus qauv. Vim tias tus nqi ntawm tus kwv yees nyob ntawm tus qauv, tus kwv yees yogib qho sib txawv, thiab qhov kwv yees feem ntau yuav tsis sib npaug ntawm tus nqi ntawm cov pej xeem parameter pejxeem hauv kev txheeb cais, as opposed to nws. Kev siv dav hauv kev ua lej, qhov ntsuas yog txhua qhov ntsuas qhov ntsuas ntawm cov neeg txheeb cais uas sau los yog piav qhia txog ib feem ntawm cov pejxeem , xws li qhov txhais tau lossis tus qauv sib txawv. … Yog li qhov "statistical parameter" tuaj yeem raug hu tshwj xeeb tshaj yog ib qho kev ntsuas pej xeem. https://en.wikipedia.org › wiki › Statistical_parameter
Kev ntsuas tus lej - Wikipedia
Puas kwv yees random?
Ua haujlwm ntawm cov ntaub ntawv, tus kwv yees nws tus kheej yog qhov sib txawv tsis sib xws; ib qho kev paub txog qhov sib txawv ntawm qhov sib txawv no yog hu ua "kev kwv yees". Qee zaum cov lus "kwv yees" thiab "kwv yees" yog siv sib hloov.
Koj kwv yees qhov sib txawv li cas?
6 Linear MMSE Kev kwv yees ntawm Random Variables. Piv txwv tias peb xav kwv yees tus nqi ntawm qhov tsis pom qhov txawv txav X, muab tias peb tau pom Y=y. Feem ntau, peb kwv yees ˆx yog ua haujlwm ntawm y ˆx=g(y). Piv txwv li, qhov kwv yees MMSE ntawm X muab Y=y yog g(y)=E[X|Y=y].
Kev txheeb cais puas yog qhov sib txawv?
AKev txheeb cais yog qhov sib txawv tsis sib xws (xws li T): Ib qho kev txheeb cais yog ib qho ua haujlwm ntawm cov ntaub ntawv(tsis hloov pauv ntawm cov qauv mus rau cov qauv). Cov ntaub ntawv tau piav qhia los ntawm qhov sib txawv ntawm qhov sib txawv (ntawm qee qhov tsim nyog). Raws li txhua txoj haujlwm ntawm qhov sib txawv ntawm qhov sib txawv yog nws tus kheej yog qhov sib txawv ntawm qhov sib txawv, qhov txheeb cais yog qhov sib txawv random.
Ob hom kev sib txawv yog dab tsi?
Muaj ob hom kev sib txawv, discrete thiab txuas ntxiv.
Pom zoo:
Puas yog siv los kwv yees cov tshuaj tiv thaiv quenching hauv cov hlau?
_ yog siv los kwv yees cov tshuaj tiv thaiv quenching hauv cov hlau. Nqe lus piav qhia: Ib qho isothermal transformation (IT)yog ib qho cuab yeej siv los ntawm cov kws kho cua sov los xam cov tshuaj tiv thaiv quenching hauv steels. Daim duab IT tuaj yeem hu ua lub sijhawm-kub-hloov daim duab.
Puas yog txawv txawv thiab txawv txawv lossis cov lus sib txawv?
Cov lus txawv txawv thiab txawv txawv yog synonyms, tab sis txawv ntawm nuance. Tshwj xeeb, alienate tej zaum yuav los yog tsis qhia kev sib cais tab sis ib txwm hais txog kev poob kev hlub lossis kev txaus siab. Dab tsi yog lub ntsiab lus ntawm alienate?
Puas tau kwv yees lossis tau kwv yees?
Txawm hais tias ob leeg siv, forecast yog daim ntawv nyiam . Kev kwv yees yog ib qho lus qhia tsis xwm yeem, txhais tau hais tias nws cov ntawv yav dhau los yav dhau los Cov ntawv preterite lossis preterit (/ˈprɛtərɪt/; abbreviated PRET los yog PRT) yog ib daim ntawv grammatical tense lossis verb form ua haujlwm rau denote cov xwm txheej uas tshwm sim lossis ua tiav hauv yav dhau los.
Puas yog ob kwv tij kwv tij sib yuav raug cai?
Hauv Teb Chaws Asmeskas, ob kwv tij txheeb ze raug cai sib yuav hauv txhua lub xeev. Txawm li cas los xij, kev sib yuav ntawm thawj cov kwv tij txheeb ze raug cai hauv tsuas yog ib nrab ntawm cov xeev Asmeskas. Tag nrho tag nrho, kev yuav koj tus npawg lossis ib nrab-viv ncaus yuav nyob ntawm txoj cai uas koj nyob thiab tus kheej thiab/lossis kev ntseeg.
Puas qhov sib txawv thiab qhov sib txawv ntawm tus qauv muaj cov chav nyob?
Variance yog qhov nruab nrab squared deviations los ntawm qhov txhais tau tias, thaum tus qauv sib txawv yog lub hauv paus square ntawm tus lej no. … qauv sib txawv yog qhia nyob rau hauv tib units raws li tus nqi qub (piv txwv li, feeb lossis meters).
