Video: Tus tsim tawm daim ntawv twg yog siv rau cov hmoov qhuav qhuav?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Ib tug tsis paub tus tsim tawm yuav tsum tau siv rau ib tug kom huv si qhuav ib feem rau daim ntawv ib me ntsis translucent dawb txheej.
Ib yam li ntawd, lub hom phiaj ntawm kev siv tus tsim tawm hauv kev ntsuas kua dej yog dab tsi?
Cov lub hom phiaj ntawm a tus tsim tawm yog kom zoo rub lub nkag mus rov qab tawm ntawm qhov tsis xws luag kom tso cai rau nws pom los ntawm tus neeg soj ntsuam. Qhov kev txiav txim ntawm rub nws rov qab rau saum npoo kuj tso cai rau cov nkag mus kom kis tau raws li qhov chaw nyob ib ncig ntawm qhov tsis xws luag, yog li ua kom lub zog ntawm qhov taw qhia.
Dab tsi yog lub ntsiab lus tseem ceeb ntawm kev ntsuam xyuas kua penetrant? Lub hauv paus ntsiab lus ntawm kev ntsuam xyuas kua penetrant yog tus kua penetrant yog kos rau hauv qhov tawg-tawg tawg los ntawm kev ua capillary thiab tshaj qhov chaw nkag mus ces muab tshem tawm; tus tsim tawm (feem ntau yog cov hmoov qhuav) yog tom qab ntawd siv rau saum npoo, kos tawm qhov nkag mus nyob rau hauv lub tawg thiab tsim ib tug nto qhia.
Yog li ntawd, tus tsim tawm hom twg yog qhov xav tau tshaj plaws?
Tsis muaj tseeb tus tsim tawm feem ntau lees paub tias yog rhiab tshaj plaws thaum siv kom raug. Muaj kev pom zoo tsawg dua ntawm kev ua haujlwm ntawm cov dej qhuav thiab dej ntub dej tus tsim tawm , tab sis dej tus tsim tawm feem ntau yog xav txog ntau rhiab heev.
Dab tsi yog hlau smearing?
8.3 Hlau Smearing . Ntws ntawm nto hlau tej zaum yuav tshwm sim los ntawm machining kev khiav hauj lwm, puas thaum lub sij hawm kev pab cuam, los yog deformation thaum lub sij hawm sib dhos los yog disassembly ntawm lub aircraft los yog cov khoom. Qhov tob ntawm smearing nyob rau hauv cov ntaub ntawv nonmagnetic thiab nws cov teebmeem metallurgical yuav tsis tshua muaj tshaj 0.002 txog 0.003 nti.
Pom zoo:
Cov duab twg yog siv rau daim ntawv NFPA 704?
Plaub ntu ntau xim "square-on-point" (pob zeb diamond/placard) yog siv los hais txog kev noj qab haus huv, flammability, instability thiab tshwj xeeb txaus ntshai tshwm sim los ntawm lub sij hawm luv luv, mob tshwm sim uas yuav tshwm sim thaum hluav taws kub, nchuav los yog lwm yam xwm txheej zoo sib xws
Txoj kev faib cov ntaub ntawv twg muab cov ntaub ntawv sib npaug ntawm cov ntaub ntawv lossis cov kev tshuaj xyuas hauv txhua chav kawm cov ntaub ntawv?
Quantile. txhua chav kawm muaj cov yam ntxwv sib npaug. Ib qho kev faib tawm ntau yog zoo haum rau cov ntaub ntawv faib tawm. Quantile muab tib tus lej ntawm cov ntaub ntawv muaj nuj nqis rau txhua chav kawm
Cov yam ntxwv ntawm cov ntaub ntawv twg yog qhov ntsuas ntawm tus nqi uas cov ntaub ntawv muaj nuj nqis heev?
Variation: Ib qho kev ntsuas ntawm tus nqi uas cov ntaub ntawv muaj nuj nqis sib txawv. ? Kev faib tawm: Cov xwm txheej lossis cov duab ntawm kev sib kis ntawm cov ntaub ntawv hla ntau qhov tseem ceeb (xws li tswb-puab). ? Outliers: Cov qauv piv txwv uas nyob deb heev ntawm feem ntau ntawm lwm cov qauv nqi
Yuav ua li cas koj sau txoj kab nqes nqes intercept daim ntawv nyob rau hauv tus qauv daim ntawv?
Standard form yog lwm txoj hauv kev los sau daim ntawv nqes hav-intercept (as opposed to y=mx+b). Nws sau li Ax+By=C. Koj tuaj yeem hloov daim ntawv nqes hav-intercept rau cov qauv zoo li no: Y=-3/2x + 3. Tom ntej no, koj cais qhov y-intercept (qhov no nws yog 2) zoo li no: Ntxiv 3/2x rau txhua sab ntawm kab zauv kom tau qhov no: 3/2x + y = 3
Cov txheej txheem dab tsi uas tus kws tshawb fawb siv los tsim ntau cov ntawv luam ntawm DNA xav tau sau rau hauv daim ntawv dawb paug 1?
Molecular Cloning. Cloning tso cai rau tsim ntau cov ntawv luam ntawm cov noob, qhia cov noob, thiab kawm txog cov noob tshwj xeeb. Yuav kom tau txais cov DNA tawg rau hauv cov kab mob hauv cov kab mob hauv daim ntawv uas yuav tau theej lossis nthuav tawm, cov khoom tawg yog thawj zaug tso rau hauv plasmid