Video: Nws txhais li cas rau parameterize ib yam dab tsi?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
"Tau parameterize "los ntawm nws tus kheej txhais tau tias "hais qhia nyob rau hauv cov nqe lus ntawm parameters". Parameterization yog cov txheej txheem lej suav nrog kev qhia txog lub xeev ntawm cov txheej txheem, txheej txheem lossis cov qauv ua haujlwm ntawm qee qhov kev ywj pheej hu ua parameters.
Ib yam li ntawd, nws yog nug, vim li cas peb thiaj xav tau parameterization?
Ib tug nkhaus (los yog nto) yog parameterized yog tias muaj daim ntawv qhia los ntawm kab (los yog dav hlau) mus rau qhov nkhaus (los yog nto). Yog li, piv txwv li, koj yuav parameterize ib kab los ntawm: Daim duab qhia chaw yog ib txoj haujlwm uas yuav siv t mus rau qhov nkhaus hauv 2D lossis 3D. Rau qhov chaw, daim ntawv qhia yog ib txoj haujlwm uas siv ob qhov tsis muaj (s, t) mus rau qhov chaw hauv 3D.
Ib tug kuj yuav nug, nws txhais li cas rau Parameterize ib kab? Nyob rau hauv thiaj li yuav parameterize ib kab , koj yuav tsum paub tsawg kawg yog ib qho ntawm cov ntsiab lus kab , thiab cov kev taw qhia ntawm lub kab . Yog tias koj paub ob lub ntsiab lus ntawm lub kab , koj ua tau nrhiav nws txoj kev taw qhia. Cov parameterization ntawm a kab yog r(t) = u + tv, where u yog ib point on kab thiab v yog ib vector parallel rau lub kab.
Sib piv, Reparameterize txhais li cas?
Reparametrize txhais tau tias teem U thiab V ntawm ib tug nto ntawm 0 mus rau 1 es tsis txhob ntawm qhov ntau thiab tsawg. Koj tuaj yeem xav txog kev teeb tsa qhov chaw hauv feem pua (0 txog 1) es tsis txhob siv qhov ntev tiag tiag (piv txwv li ntawm 0 txog 144). Vam tias qhov no yog to taub. 3. Nov 7, 2011.
Natural parameterization yog dab tsi?
Cov parameterization ntawm ib tug nkhaus los ntawm ntuj parameter yog hu ua nws natural parameterization . Cov natural parameterization ntawm k-time sib txawv (analytic) nkhaus uas tsis muaj cov ntsiab lus tseem ceeb kuj yog k lub sij hawm sib txawv (analytic).
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