Video: Puas Teem Siv sib npaug?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Cov Teeb . sib npaug () method yog tsuas yog siv los sib piv ob teeb rau kev sib npaug . Koj siv tau a Teeb kom tshem tawm cov kev nkag nkag, tab sis ceev faj: HashSet tsis siv qhov sib npaug () txoj hauv kev ntawm nws cov khoom siv los txiav txim kev sib npaug.
Hauv qhov no, lub teeb puas tuaj yeem sib npaug thiab sib npaug?
Sib npaug yog sib npaug , mas sib npaug tej zaum tsis yog sib npaug . Qhov no tau piav qhia hauv qhov piv txwv saum toj no uas A ~ B, tab sis A ≠ B. Ob teeb yog sib npaug thaum lawv muaj raws nraim tib lub ntsiab, thiab teeb yog sib npaug thaum ib-rau-ib tsab ntawv ua tau ua teeb nce nruab nrab ntawm ob teeb.
Puas yog HashSet siv qhov sib npaug lossis hashCode? Kev sib raug zoo ntawm sib npaug thiab hashCode yog: if sib npaug rov qab muaj tseeb, ces hashCode yuav tsum rov qab tus nqi qub. Txwv tsis pub tus qauv zoo li java. siv. HashSet yuav tsis pom tib lub thoob thiab tsis tuaj yeem lav tias tsis muaj ob sib npaug cov khoom hauv a HashSet.
Kuj Paub, Dab tsi yog qhov tsis sib xws?
Sib npaug thiab Tsis sib xws Ob teeb X thiab Y tau hais kom sib npaug yog tias lawv muaj cov ntsiab lus zoo ib yam (tsis hais txog qhov kev txiav txim ntawm qhov tshwm sim hauv teeb ). Sib npaug teeb yog sawv cev li X = Y. Txwv tsis pub, tus teeb raug hu ua tsis sib xws , uas yog sawv cev raws li X ≠ Y.
Qhov sib npaug thiab sib npaug yog dab tsi?
Sib npaug . Sib npaug thiab sib npaug yog cov lus uas nquag siv hauv lej. Lub ntsiab qhov sib npaug ntawm qhov sib npaug thiab sib npaug yog lub sij hawm ntawd sib npaug hais txog tej yam uas zoo sib xws hauv txhua yam, whereas lub sij hawm sib npaug hais txog tej yam uas zoo sib xws hauv a yam tshwj xeeb.
Pom zoo:
Dab tsi coefficients koj tuaj yeem siv hauv kev sib npaug sib npaug?
Ua ntej: cov coefficients muab cov naj npawb ntawm cov molecules (los yog atoms) koom nrog cov tshuaj tiv thaiv. Hauv qhov piv txwv cov tshuaj tiv thaiv, ob lub molecules ntawm hydrogen react nrog ib molecule ntawm oxygen thiab tsim ob molecules ntawm dej. Thib ob: cov coefficients muab tus naj npawb ntawm moles ntawm txhua yam tshuaj koom nrog hauv cov tshuaj tiv thaiv
Yuav daws qhov tsis sib npaug ntawm cov kab sib npaug thiab cov kab sib npaug sib npaug li cas?
Kev daws qhov tsis sib npaug ntawm qhov sib npaug yog zoo ib yam li kev daws cov kab sib npaug. Qhov sib txawv tseem ceeb yog koj tig lub cim tsis sib xws thaum faib lossis muab faib los ntawm tus lej tsis zoo. Graphing linear inequalities muaj ob peb qhov sib txawv ntxiv. Qhov uas yog qhov ntxoov ntxoo muaj xws li qhov tseem ceeb uas qhov kev tsis sib xws ntawm cov kab tawm muaj tseeb
Puas yog Goode's interrupted Homolosine projection ib qho kev pom zoo lossis sib npaug ntawm thaj tsam sib npaug?
Qhov cuam tshuam Goode Homolosine qhov projection (Goode's) yog qhov cuam tshuam, pseudocylindrical, thaj tsam sib npaug, sib xyaw daim ntawv qhia kev kwv yees uas tuaj yeem nthuav tawm tag nrho lub ntiaj teb ntawm ib daim ntawv qhia. Cov av loj thoob ntiaj teb tau nthuav tawm nrog lawv cov cheeb tsam kom raug, nrog kev cuam tshuam tsawg, thiab kev cuam tshuam tsawg kawg nkaus
Puas yog txhua qhov sib npaug sib npaug sib npaug?
Thawj qhov sib npaug sib npaug yog qhov tseeb yog tias nws muaj kev txuag kom muaj nuj nqis. Piv txwv li, qhov sib npaug sib cais yeej ib txwm muaj tseeb, txij li lub ntsiab lus lawv yog ntawm daim ntawv: M(y) + N(t) = 0, yog li ϕ(t, y) = A(y) + B(t) yog a khaws cia kom muaj nuj nqis
Dab tsi yog qhov sib txawv ntawm cov kab lus sib npaug thiab qhov sib npaug sib npaug?
Cov kab lus sib npaug muaj qhov muaj txiaj ntsig zoo ib yam tab sis tau nthuav tawm nyob rau hauv ib hom ntawv sib txawv uas siv cov khoom ntawm cov lej xws li ax + bx = (a + b) x yog cov kab lus sib npaug. nruj me ntsis, lawv tsis yog 'sib npaug', yog li peb yuav tsum siv 3 kab sib luag hauv 'sib npaug' es tsis yog 2 raws li qhia ntawm no