Khoom siv khoom noj yog qhov taw qhia uas qhia txog kev noj cov cuab yeej hauv ib chav ntuj lossis ib lub cev ntawm ib tus nqi ntawm cov khoom lag luam tsim tawm. Kev siv cov khoom siv yog ntsuas raws cov nyiaj txiag, cov khoom siv lub cev lossis feem pua, uas ua rau cov nqi ntawm cov khoom siv hauv tus nqi tag nrho ntau lawm.
Cov Lus Qhia
Kauj ruam 1
Txhawm rau kom pom cov khoom siv khoom, faib cov nqi ntawm cov khoom siv los ntawm tus nqi ntawm cov khoom lag luam. Qhov ntsuas no tso cai rau koj los txiav txim tus nqi ntawm raw cov ntaub ntawv thiab lwm yam khoom siv rau ib pawg ntawm cov khoom tiav. Kev txo qis ntawm kev siv khoom qhia tau hais tias kev nce nqi ntawm kev tsim khoom, vim tias qhov loj dua ntawm cov khoom tiav tuaj yeem tau los ntawm tib lub ntim ntawm cov khoom siv, uas txhais tau tias, kom txo tus nqi thiab tsim txiaj ntxiv.
Kauj ruam 2
Thov nco ntsoov tias muaj kev tsis tsim nyog, kev teeb tsa thiab cov khoom noj tshwj xeeb. Kev noj zaub mov kiag li qhia tau tias tus nqi ntawm ib qho khoom, qhov hnyav ntawm qhov khoom thiab qhov ntsuas ntawm kev siv cov khoom siv:
Kisp = ΣMclean / ΣNр, nyob qhov twg
Mchist - lub luj qhov hnyav ntawm txhua yam khoom;
Nр - tus nqi ntawm kev noj ntawm cov ntaub ntawv rau txhua cov khoom.
Kev noj tag nrho tus nqi ntawm cov ntaub ntawv rau txhua cov khoom lag luam yog txiav txim siab raws li kev tsim tus nqi ntawm kev noj cov khoom rau txhua hom khoom siv. Piv txwv li, thaum ua lub khob cij, tag nrho cov kev siv nyiaj yuav pom zoo li no: ΣNр = Nрм + Nрс + Nрв + Nрс, qhov twg
Npm - kev noj cov hmoov nplej, cov poov xab, dej, ntsev.
Kauj ruam 3
Cov khoom siv kev teeb tsa nthuav tawm qhia cov kev faib ua feem ntawm ib pawg ntawm cov khoom hauv qhov khoom siv tag nrho cov khoom ntawm cov khoom. Los xam nws, siv tus qauv:
i = R / Σμi, qhov twg
R yog pes tsawg hom khoom siv;
isi yog cov sib qhia ntawm txhua qhov khoom hauv kev noj khoom siv tag nrho.
Kauj ruam 4
Cov khoom siv tshwj xeeb kev noj haus yog cov khoom siv sib xyaw ua rau txo qis rau qhov ntsuas ntuj ntawm qee hom khoom (ntsuas, square, cub sau lo lus, litres, thiab lwm yam). Nco ntsoov tias cov txheej txheem ntawm cov ntsuas ntawm cov khoom siv yog ze rau cov kab ke ntawm kev noj cov khoom, txij li lub hauv paus tseem ceeb ntawm kev tshuaj xyuas cov khoom siv, ua ke nrog cov ntaub ntawv tiag tiag ntawm kev siv cov khoom siv hauv lub sijhawm tseem tshuaj xyuas, yog tus nqi ntawm kev noj ntawm cov ntaub ntawv. Kev laij tawm thiab txheeb xyuas ntawm kev siv cov khoom pub tso cai rau peb los xaus txog lub txiaj ntsig ntawm kev siv cov khoom nyoos thiab lawv khaws nyiaj.
