Video: Dab tsi yog qhov teeb meem tsis yog linear?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Ib qho piv txwv ntawm a tsis yog - linear teeb meem ib = x^2. Yog tias koj pib nrog x = 1, 2, 3, 4 qhov tshwm sim y = 1, 4, 9, 16. A linear teeb meem yog ib qho teeb meem uas yog daws los ntawm kev teeb tsa nkaus xwb kab tawm sib npaug los yog kab tawm systems ofequations los daws. Ib qho kev qhia hauv variablesx1,,xov yog kab tawm yog hais tias nws yog ntawm forma1x1+
Kuj nug, qhov teeb meem tsis yog linear programming yog dab tsi?
Hauv lej, nonlinear programming (NLP) yog tus txheej txheem ntawm kev daws ib qho teeb meem optimization qhov twg qee qhov kev txwv lossis lub hom phiaj ua haujlwm nonlinear . Nws yog sub-field ntawm lej kev ua kom zoo uas deals nrog teeb meem uas tsis yog kab tawm.
Dab tsi yog qhov txawv ntawm linear thiab nonlinear programming? Linear programming yog ib txoj hauv kev kom ua tiav cov txiaj ntsig zoo tshaj plaws hauv a tus qauv lej uas nws yuav tsum tau sawv cev los ntawm kab tawm kev sib raug zoo hos nonlinearprogramming yog txheej txheem ntawm kev daws qhov teeb meem optimization qhov twg cov kev txwv los yog lub hom phiaj ua haujlwm nonlinear.
Tom qab ntawd, ib tug kuj yuav nug, dab tsi yog qhov tsis yog linear function?
Linear functions muaj txoj kab nqes tsis tu ncua, yog li ntawd nonlinear muaj nuj nqi muaj ib txoj kab nqes uas txawv ntawm cov ntsiab lus. Algebraically, linear functions yog polynomials nrog siab tshaj exponent sib npaug rau 1 los yog ntawm daim ntawv y = c qhov twg c yog qhov tsis tu ncua. Nonlinear muaj nuj nqi yog lwm yam muaj nuj nqi . Ib qho piv txwv ntawm a nonlinear muaj nuj nqi y = x^2.
Dab tsi yog qhov kev xav tsis yog linear?
Hauv tsis yog - linear kev xav , peb ua kev sib txuas ntawm cov ntsiab lus tsis sib xws lossis cov tswv yim. Tsis yog - kab tawm cov neeg xav yog abstract nyob rau hauv lawv xav . Lawv nyiam ua cov kws ua yeeb yam zoo. Hauv tsis yog - linear kev xav , peb ua si nrog peb txoj kev xav, thiab tawm tswv yim los daws peb cov teeb meem lossis nkag siab thiab sawv cev rau qee yam.
Pom zoo:
Qhov kev daws teeb meem twg yog qhov tsis?
Cov tshuaj tsis haum yog ib qho uas tiv thaiv kev hloov pauv hauv pH thaum me me ntawm cov kua qaub lossis alkali ntxiv rau nws. Acid buffer daws. Cov tshuaj acidic buffer tsuas yog ib qho uas muaj pH tsawg dua 7. Cov tshuaj acidic buffer feem ntau yog tsim los ntawm cov kua qaub tsis muaj zog thiab ib qho ntawm nws cov ntsev - feem ntau yog sodium ntsev
Koj yuav txiav txim siab li cas yog tias qhov tsis sib xws tsis muaj kev daws teeb meem?
Cais tawm tus nqi tseeb ntawm sab laug ntawm qhov tsis sib xws. Yog tias tus lej ntawm sab nraud ntawm qhov tsis sib xws yog qhov tsis zoo, koj qhov kev sib npaug tsis muaj kev daws teeb meem lossis tag nrho cov lej tiag tiag li kev daws teeb meem. Siv cov cim ntawm txhua sab ntawm koj qhov tsis sib xws los txiav txim siab qhov twg ntawm cov xwm txheej no tuav
Dab tsi yog qhov teeb meem ntawm lub teeb nyob rau hauv lub ntuj hmo ntuj hu ua?
Gegenschein, tseem hu ua Counterglow, oval thaj ntawm faint luminosity raws nraim rau lub hnub nyob rau hauv lub hmo ntuj. Lub thaj ntawm lub teeb yog li faint nws tuaj yeem pom tsuas yog thaum tsis muaj lub hli, nyob deb ntawm lub nroog teeb, thiab nrog lub qhov muag yoog rau qhov tsaus ntuj
Yuav ua li cas koj thiaj paub yog tias tus nqi tsis sib xws tsis muaj kev daws teeb meem?
Okay, yog tias qhov tseem ceeb tshaj plaws yeej ib txwm zoo lossis xoom tsis muaj txoj hauv kev uas lawv tuaj yeem tsawg dua lossis sib npaug rau tus lej tsis zoo. Yog li ntawd, tsis muaj kev daws teeb meem rau ob qho no. Hauv qhov no yog tias tus nqi tiag tiag yog qhov zoo lossis xoom ces nws yuav nco ntsoov ntau dua lossis sib npaug rau tus lej tsis zoo
Puas yog khoov ntawm lub teeb tsis nyob ib puag ncig cov teeb meem?
Diffraction yog pom ntawm lub teeb tsis muaj zog tab sis tsuas yog thaum nthwv dej ntsib teeb meem nrog cov wavelengths me me (xws li cov khoom raug tshem tawm hauv peb cov huab cua). Diffraction yog qhov khoov ntawm nthwv dej ncig obstacles thiab qhib. Tus nqi ntawm diffraction nce nrog nce wavelength