Kev loj hlob ntawm tus kheej yog hais txog cov kev ntsuas uas nquag siv hauv kev ntsuas tawm los mus ntsuas qhov sib txawv ntawm kev loj hlob thiab hloov mus raws sijhawm. Qhov ntsuas no yog qhov txheeb ze thiab tau los ntawm kev sib piv cov qib hloov ntawm theem ntawm kev loj hlob ntawm lawv tus kheej, qhov tsis meej thiab loj hlob ntxiv.
Cov Lus Qhia
Kauj ruam 1
Raws li txoj cai, rau kev suav ntsuas, kev sib piv ntawm ntau qib kev ua tiav yog siv. Nyob ntawm seb qhov ntsuas twg uas lawv piv nrog, kev sib txawv yog tsim rau hauv cov cim thiab theem pib. Yog tias qhov sib piv tau ua nrog qee qhov pib tsis tu ncua, tom qab ntawd qib tau hu ua lub hauv paus, yog tias qhov sib piv yog nrog lub sijhawm dhau los, tom qab ntawd cov qib ntawd hu ua theem saw. Yog li, qhov ntsuas pib yooj yim yog qhov kawg ntawm qhov hloov pauv ntawm qhov pib mus txog qib kawg, cov cim qhia tau cim cov theem ntawm kev hloov mus ntau ntu hauv cov sijhawm kawm. Tab sis cov lej ntawm cov saw hlau hloov pauv mus rau qhov kawg yog sib npaug nrog cov kev hloov hauv lub hauv paus.
Kauj ruam 2
Txheeb xyuas qhov rho tawm qhov tseeb (ABG) kev siv tus qauv:
APb = Yi - Yo, qhov twg:
Yi - qib ntawm lub sijhawm sib piv, Yo - qib ntawm lub sij hawm coj los ua lub hauv paus.
Txheeb xyuas qhov tseeb txoj saw nce, uas tseem hu ua kev nce qib (APs), siv tus qauv:
= Yi - Yi-1, nyob qhov twg
Yi-1 yog qib theem ntawm lub sijhawm dhau los.
Kauj ruam 3
Txheeb xyuas qhov kev loj hlob coefficient K, nws cim cov feem sib piv ntawm kev hloov pauv ntawm cov ntsuas qhov tau kawm ntawm cov koob thiab tau txhais raws qhov piv ntawm theem no mus rau theem pib lossis theem pib.
Qhov pib loj hlob npaum li cas (KB) yog:
KB = Yi / Yo.
Qhov saw txoj kev loj hlob tau (Kts) yog muaj sib npaug rau:
Kts = Yi / Yi-1.
Yuav kom paub cov qib kev loj hlob (Tr), qhia txog kev nce qib feem pua:
Tr = K * 100%.
Kauj ruam 4
Qhov ntsuas ntawm qhov ntsuas ntawm kev loj hlob (Tp) yog txhais raws qhov piv ntawm kev loj hlob tiag tiag ntawm qib kawm mus rau qhov pib lossis ib qho dhau los.
Qeb kev loj hlob theem pib (Тпб) yuav sib npaug:
TPB = ((Yi - Yo) / Yo) * 100%.
Txheeb xyuas qhov nce txoj saw nce siab los ntawm cov qauv:
TPC = ((Yi - Yi-1) / Yi-1) * 100%.
Kauj ruam 5
Txoj kev loj hlob tuaj yeem txhais tau tias yog qhov sib txawv ntawm qhov kev loj hlob thiab ib qho, lossis raws li qhov sib txawv ntawm qhov kev loj hlob thiab 100%:
TP = K-1
lossis:
TP = TP - 100%
