Video: Dab tsi yog qhov ntsuas qhov tsawg kawg nkaus?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
❑ “Txoj kev kuaj pom txwv (MDL) yog. txhais raws li cov yam tsawg kawg nkaus concentration ntawm a. khoom uas ntsuas tau thiab. qhia nrog 99% kev ntseeg siab tias cov. analytes concentration yog ntau tshaj xoom.
Ua li no, ua li cas koj thiaj li nrhiav tau qhov tsawg kawg nkaus kev txwv?
Raws li kev ntsuam xyuas pom: Lub kuaj pom txwv yog txiav txim siab los ntawm kev tsom xam ntawm cov qauv nrog paub cov concentrations ntawm cov tshuaj ntsuam xyuas thiab los ntawm kev tsim cov yam tsawg kawg nkaus theem ntawm qhov kev tshuaj ntsuam tuaj yeem suav nrog qhov raug thiab raug.
Kuj Paub, koj txiav txim siab LOD thiab LOQ li cas? LoD yog txiav txim siab los ntawm kev siv ob qho tib si ntsuas LoB thiab kev sim rov ua dua ntawm cov qauv uas paub tias muaj qhov ntsuas qis ntawm cov tshuaj ntsuam xyuas. LoQ yog qhov tsawg tshaj plaws concentration ntawm qhov kev tshuaj ntsuam xyuas tsis tau tsuas yog ntseeg tau pom tab sis nyob rau hauv uas ib co predefined lub hom phiaj rau kev tsis ncaj ncees thiab imprecision tau ntsib.
Ib tug kuj yuav nug, yog qhov kev txwv tsawg ntawm kev kuaj pom zoo?
Hauv analytical chemistry, lub kuaj pom txwv , qis dua qhov kev kuaj pom los yog LOD ( txwv kev kuaj pom ), yog qhov tsawg tshaj plaws ntawm cov khoom uas tuaj yeem paub qhov txawv ntawm qhov tsis muaj cov khoom ntawd (tus nqi dawb paug) nrog rau qib kev ntseeg siab (feem ntau 99%).
Dab tsi yog qhov ntsuas ntsuas ntsuas qhov txwv?
Ntsuas ntsuas qhov txwv (IDL) yog qhov concentration sib npaug rau lub teeb liab, vim qhov ntsuas ntawm. kev txaus siab, uas yog lub teeb liab me tshaj plaws uas tuaj yeem paub qhov txawv ntawm lub suab nrov tom qab los ntawm ib qho tshwj xeeb. ntsuas.
Pom zoo:
Qhov tsawg kawg nkaus nrug ntawm lub ntiaj teb thiab lub hnub yog dab tsi?
Hnub yog nyob rau 3rd lossis 4th Lub Ib Hlis, nws yog hu ua perihelion. Hnub ntawd, qhov kev ncua deb ntawm lub ntiaj teb thiab lub hnub yog kwv yees li 148 km sib nrug
Qhov siab tshaj plaws thiab qhov tsawg kawg nkaus hauv lej yog dab tsi?
Hauv kev ua lej, qhov siab tshaj plaws thiab qhov tsawg kawg nkaus ntawm qhov muaj nuj nqi yog qhov loj tshaj plaws thiab qhov tsawg tshaj plaws uas qhov kev ua haujlwm yuav siv ntawm ib qho chaw. Yam tsawg kawg txhais tau tias qhov tsawg tshaj plaws koj tuaj yeem ua tau ib yam dab tsi
Dab tsi yog qhov tsawg kawg nkaus kev nyab xeeb ntawm cov kab hluav taws xob overhead?
Lub Chaw Tswj Xyuas Kev Nyab Xeeb Kev Nyab Xeeb thiab Kev Noj Qab Haus Huv (OSHA) xav kom cov cuab yeej khaws cia tsawg kawg 10 ko taw deb ntawm cov kab hluav taws xob uas muaj qhov hluav taws xob mus txog 50kV. Rau cov kab uas muaj qhov hluav taws xob siab dua 50kV, qhov kev ncua deb yuav tsum muaj ntau dua (saib hauv qab)
Tus txheeb ze yam tsawg kawg nkaus thiab qhov siab tshaj plaws yog dab tsi?
Ib qho piv txwv siab tshaj plaws yog qhov taw tes uas qhov kev ua haujlwm hloov pauv kev coj ua los ntawm kev nce mus rau qis (ua qhov taw tes rau 'peak' hauv daim duab). Ib yam li ntawd, qhov txheeb ze qhov tsawg kawg nkaus yog qhov taw tes uas qhov kev ua haujlwm hloov pauv kev taw qhia los ntawm kev txo qis mus rau nce (ua qhov taw tes ntawd 'hauv qab' hauv daim duab)
Qhov siab tshaj plaws lossis qhov tsawg kawg nkaus ntawm parabola yog dab tsi?
Vertical parabolas muab cov ntaub ntawv tseem ceeb: Thaum lub parabola qhib, lub vertex yog qhov qis tshaj plaws ntawm daim duab - hu ua qhov tsawg kawg nkaus, lossis min. Thaum lub parabola qhib, lub vertex yog qhov siab tshaj plaws ntawm daim duab - hu ua themaximum, lossis max