2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
NP-ua tiav qhov teeb meem, ib qho ntawm chav kawm ntawm cov teeb meem suav nrog cov teeb meem hauv computer science, cov teeb meem kev suav yog ib qho teeb meem uas lub khoos phis tawj tuaj yeem daws tau lossis cov lus nug uas lub khoos phis tawj tuaj yeem ua tau. teb tau. Piv txwv li, qhov teeb meem ntawm factoring. "Muab tus lej zoo n, nrhiav qhov tsis tseem ceeb ntawm n." https://en.wikipedia.org › wiki › Computational_problem
Computational problem - Wikipedia
rau qhov tsis muaj kev daws teeb meem zoo tau pom. Ntau qhov teeb meem tseem ceeb hauv computer-science muaj nyob rau hauv chav kawm no-piv txwv li, qhov teeb meem ntawm tus neeg muag khoom mus ncig, teeb meem txaus siab, thiab teeb meem npog.
Yuav muaj pes tsawg NP cov teeb meem tiav?
daim ntawv no tsis muaj kev qhia meej (muaj ntau tshaj 3000 paub NP-ua tiav cov teeb meem). Feem ntau ntawm cov teeb meem hauv daim ntawv teev npe no yog muab los ntawm Garey thiab Johnson phau ntawv hais lus hauv Computers thiab Intractability: Phau Ntawv Qhia rau Txoj Cai ntawm NP-Completeness, thiab nyob ntawm no tau nthuav tawm hauv tib qho kev txiav txim thiab lub koom haum.
Yuav ua li cas paub yog tias muaj teeb meem NP-ua tiav?
A kev txiav txim teeb meem L yog NP-ua tiav yog: 1) L yog nyob rau hauv NP (Txhua qhov kev daws teeb meem rau NP-ua tiav cov teeb meem tuaj yeem tshawb xyuas sai, tab sis tsis muaj txiaj ntsig. paub daws). 2) Txhua qhov teeb meem hauv NP yog txo qis rau L hauv lub sij hawm polynomial (Txo yog txhais hauv qab no).
Npua tiav muab dab tsipiv txwv rau NP-ua tiav teeb meem?
NP-Tag nrho cov teeb meem tuaj yeem daws tau los ntawm kev tsis txiav txim siab Algorithm / Turing Tshuab hauv lub sijhawm ntau. Yuav kom daws tau qhov teeb meem no, nws tsis tas yuav nyob hauv NP. … Nws tsuas yog ib qho kev txiav txim siab xwb. Piv txwv li: H alting teeb meem, Vertex npog teeb meem, Circuit-satisfiability teeb meem, thiab lwm yam.
Puas yog qhov teeb meem txheeb xyuas NP-ua tiav?
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Muab ib daim ntawv teev cov lej, koj tuaj yeem tshawb xyuas seb cov npe puas raug txheeb lossis tsis nyob hauv lub sijhawm ntau, yog li qhov teeb meem yog meej NP. Muaj cov paub algorithms los txheeb cov npe ntawm cov lej hauv lub sijhawm polynomial. (Npuas txheeb O(n^2) thiab lwm yam).
Pom zoo:
Cov tsos mob thiab cov tsos mob twg qhia tias muaj teeb meem myasthenic?
Cov tsos mob thiab cov tsos mob ntawm myasthenic ntsoog yog dab tsi? Ua pa nyuaj lossis hais lus. Daim tawv nqaij nruab nrab ntawm koj cov tav, ncig koj caj dab, lossis ntawm koj lub plab rub thaum koj ua pa. Muag taub hau, lossis nkees thaum nruab hnub.
Cov qauv ntawm cov teeb meem twg yog qhov sib xyaw?
Ib yam khoom uas muaj tib hom atom lossis ib hom molecule yog cov khoom ntshiab. Feem ntau ntawm cov teeb meem nyob ib puag ncig peb, txawm li cas los xij, muaj cov khoom sib xyaw ntawm cov khoom ntshiab. Huab cua, ntoo, pob zeb thiab av yog piv txwv ntawm cov khoom sib tov.
Cov roj teeb uas ntws tawm puas muaj txiaj ntsig lossis muaj teeb meem?
Thaum cov roj teeb tsis raug pov tseg ntawm lub casing tuaj yeem tawg tau thiab cov tshuaj lom neeg nyob hauv tuaj yeem nkag mus rau ib puag ncig ib puag ncig. Cov khoom xau tuaj yeem ua paug rau hauv av thiab dej thiab qee qhov ntawm cov khoom tuaj yeem sib sau hauv cov tsiaj qus thiab tib neeg.
Qhov txawv ntawm qhov teeb meem thiab teeb meem yog dab tsi?
Raws li adjective qhov txawv ntawm qhov teeb meem thiab teeb meem. yog tias teeb meem yog teeb meem; nyuaj los kov yeej lossis daws tau thaum muaj teeb meem tsis txaus ntseeg lossis tsis txaus siab. Puas teeb meem grammatically yog lawm?
Vim li cas cov ntawv hloov pauv yog teeb meem rau cov evolutionists?
Ib qhov tsis meej pem yog qhov kev xav tias kev hloov pauv ntawm ob pawg neeg sib txawv yuav tsum yog cov poj koob yawm txwv ncaj qha ntawm ib lossis ob pawg. Qhov nyuaj yog exacerbated los ntawm qhov tseeb hais tias ib tug ntawm cov hom phiaj ntawm evolutionary taxonomy yog los txheeb xyuas taxa uas yog poj koob yawm txwv ntawm lwm taxa.
