TsimScience

Lub correlation coefficient - cov yam ntxwv correlation qauv

Correlation qauv (CM) - ib tug xam kev pab cuam uas muab kev txais tos ntawm ib tug zauv kab zauv, nyob rau hauv uas cov khoom taw qhia quantified nyob rau ib los yog ntau lub cim.

yx = AO + a1h1

qhov twg: y - ua tau zoo indicators, As, nyob ntawm seb lub x tshaj;

x - kos npe rau qhov zoo tshaj;

a1 - parameter KM, uas qhia ntau npaum li cas hloov nyob rau hauv lub tsim qhia thaum hloov tau x los ntawm ib tug, Yog hais tias tag nrho cov lwm yam uas cuam tshuam rau y nyob twj ywm unchanged;

AO CM parameter uas qhia tau hais tias cov nyhuv ntawm tag nrho cov lwm yam nyob rau hauv lub zoo index ntawm y, lwm yam tshaj li qhov zoo tshaj yuav nce mus nce los x

Thaum xaiv cov zoo indicators, As thiab tau cov qauv yuav tsum coj mus rau hauv tus account lub fact tias cov kawm ntawv nyob rau hauv cov saw hlau ntawm causality stands rau ib tug ntau npaum li qhov kev kawm tau.

Nta correlation qauv

Tom qab xam cov correlation qauv tsis xam correlation coefficient.

p - yooj yim correlation coefficient, -1 ≤ r ≤ 1, nws qhia tau hais tias lub dag lub zog thiab kev taw qhia qhia rau tej yam zoo tshaj plaws. Cov los ze zog mus rau 1, lub zog txoj kev sib raug, lub ze zog mus rau 0, qhov nyiaj yog weaker. Yog hais tias lub correlation coefficient yog zoo, ces kev twb kev txuas yog ncaj, yog tsis zoo - ntxeev.

Lub correlation coefficient mis: pxy = (x-x * 1 / y) / * eu eh

eh = hh2- (x) 2; eu = y2 (y) 2

Yog hais tias lub CM linear multifactorial, muaj rau hauv daim ntawv:

yx = AO + a1h1 a2x2 + + ... + anx

ces nws twb xam ntau correlation coefficient.

0 ≤ P ≤ 1, thiab qhia tau hais tias lub dag lub zog ntawm cov nyhuv ntawm tag nrho cov noj ua ke zoo tshaj tau ntsuas.

P = 1- ((yi-yi) 2 / (yi -usr) 2)

Qhov twg: uh - tsim qhov taw qhia - xam tus nqi;

neeg soj - lub sij nqi;

usr- tiag tiag tus nqi, nruab nrab.

Kwv yees li ntawm tus nqi neeg soj tau los ntawm hloov lub correlation qauv es tsis txhob ntawm x1, x2 thiab lwm yam lawv tiag tiag qhov tseem ceeb.

Rau univariate thiab multivariate qauv nonlinear correlation piv yog xam:

-1 ≤ m ≤ 1;

0 ≤ m ≤ 1

Nws yog ntseeg hais tias cov kev sib raug zoo ntawm zoo thiab muaj nyob rau hauv tus qauv ntawm factorial ntsuas zog, yog hais tias tus ceev ceev ntawm lub coupling coefficient (m) nyob rau hauv ntau 0-0.3; yog 0.3-0.7 - txav los nyob ze ntawm txoj kev sib raug - qhov nruab nrab; 0.7-1 saum toj no - ib tug muaj zog daim ntawv cog lus.

Txij li thaum correlation coefficient (chav) r, cov correlation coefficient (ntau) R, correlation piv m - probability nqi, uas yog payment rau lub coefficients ntawm lawv tseem ceeb (txhais los ntawm lub rooj). Yog hais tias cov coefficients yog ntau tshaj li lawv cov lus muaj nuj nqis, cov closeness ntawm kev twb kev txuas coefficients yog qhov tseem ceeb ua. Yog hais tias lub essentiality ceev ceev coupling coefficients me dua rooj qhov tseem ceeb los sis yog tias nws tus kheej coupling coefficient yog tsawg tshaj li 0.7, tus qauv tsis muaj xws li tag nrho cov factorial tsis uas ho muaj kev cuam tshuam cov kev tshwm sim.

Lub coefficient ntawm kev txiav txim qha qhov feem pua zoo tshaj muaj nyob rau hauv tus qauv tsis txiav txim rau qhov tsim ntawm cov kev tshwm sim.

D = P2 * 100%

D = p2 * 100%

D = m 2 * 100%

Yog hais tias lub coefficient ntawm kev txiav txim yog ntau tshaj 50, ces tus qauv txaus qhia txog cov txheej txheem nyob rau hauv txoj kev tshawb no, yog tsawg tshaj li 50, nws yog tsim nyog los mus rov qab mus rau tus thawj theem ntawm kev tsim kho, thiab los txhim kho cov kev xaiv zoo tshaj ntsuas rau xam nyob rau hauv tus qauv.

Fisher Fisher tau los yog kauj characterizes lub efficiency ntawm tus qauv raws li ib tug tag nrho. Yog hais tias lub xam piv yog ntau tshaj ntawm lub rooj, lub ua qauv yog tsim rau kev tsom xam raws li zoo raws li kev ntsuas ntawm kev npaj rau lub neej yav tom ntej kev sib hais haum. Roughly rooj nqi = 1.5. Yog hais tias lub xam tus nqi yog tsawg tshaj li lub rooj, koj yuav tsum xub tsim ib tug qauv, xws li tseem ceeb yam influencing tshwm sim. Nyob rau hauv tas li ntawd mus rau lub efficiency ntawm lub zuag qhia tag nrho cov qauv los ho muaj kev cuam tshuam txhua regression coefficient. Yog hais tias lub xam tus nqi ntawm no piv zoo tshaj nyob rau hauv magnitude rooj, lub regression coefficient yog tseem ceeb yog tsawg, ces qhov zoo tshaj yuav parameter, rau cov uas qhov laij coefficient raug muab tshem tawm los ntawm cov qauv laij rov qab pib dua, tab sis tsis muaj no tau.

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