Video: Compound symmetry yog dab tsi?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Piv txwv li, lub Compound Symmetry qauv tsuas yog txhais tau hais tias tag nrho cov variances yog sib npaug rau ib leeg thiab tag nrho cov kev sib txawv yog sib npaug rau ib leeg. Qhov ntawd yog nws. Txhua qhov sib txawv thiab txhua qhov sib txawv yog txawv kiag li thiab tsis muaj kev cuam tshuam rau lwm tus. Muaj ntau, ntau cov qauv sib txawv.
Ntxiv mus, puas yog qhov sib xyaw ua ke hauv kev ntsuas rov qab Anova yog qhov yuav tsum tau ua?
Yog vim li cas rau siv Multivariate txoj kev mus Rov Ua Kev Ntsuas ANOVA . Cov kev sib xyaw symmetry qhov kev xav xav kom cov variances (pooled nyob rau hauv-pab pawg) thiab covariances (nrog cov kev kawm) ntawm txawv rov ntsuas dua yog homogeneous (zoo tib yam).
Ib yam li ntawd, koj piav qhia txog kev sib txawv matrix li cas? Hauv covariance matrix nyob rau hauv cov zis, cov khoom off-diagonal muaj cov kev sib txawv ntawm txhua khub ntawm qhov sib txawv. Cov kab pheeb ces kaum ntawm lub covariance matrix muaj qhov sib txawv ntawm txhua qhov sib txawv. Cov sib txawv ntsuas ntau npaum li cas cov ntaub ntawv tau tawg ntawm qhov nruab nrab.
Tsis tas li ntawd, dab tsi yog qhov kev xav ntawm sphericity?
Sphericity yog ib qho tseem ceeb kev xav ntawm ib qho kev ntsuas rov ua dua ANOVA. Nws yog qhov xwm txheej uas qhov sib txawv ntawm qhov sib txawv ntawm txhua qhov ua tau ua khub ntawm cov xwm txheej hauv cov ntsiab lus (piv txwv li, qib ntawm qhov sib txawv ntawm tus kheej) sib npaug.
Dab tsi yog qhov tshwm sim ntawm kev ua txhaum txoj kev xav ntawm kev sib tw?
Sphericity tuaj yeem muab piv rau homogeneity ntawm qhov sib txawv ntawm qhov nruab nrab ntawm ANOVA. Cov ua txhaum cai ntawm kheej kheej yog qhov hnyav rau qhov rov ntsuas ANOVA, nrog ua txhaum cai ua rau qhov kev xeem dhau los ua kev ywj pheej (piv txwv li, nce hauv Hom I yuam kev).
Pom zoo:
Lub hauv paus ntawm symmetry yog dab tsi?
Thiab ncaj qha los ntawm Latin symmetria, los ntawm Greek symmetria 'kev pom zoo nyob rau hauv qhov ntev, vim kev faib ua feem, kev npaj,' los ntawm symmetros 'muaj ib qho kev ntsuas, txawm, proportionate,' los ntawm assimilated daim ntawv ntawm syn- 'ua ke' (saib syn-) + metron ' ntsuas' (los ntawm PIE hauv paus * me- (2) ' ntsuas')
Dab tsi yog symmetry thiab nws hom hauv biology?
Hom symmetry Muaj peb hom qauv: Radial symmetry: Lub cev zoo li lub ncuav qab zib. Ob sab symmetry: Muaj ib qho axis; ntawm ob sab ntawm lub axis lub cev zoo li roughly tib yam. Spherical symmetry: Yog tias lub cev raug txiav los ntawm nws qhov chaw, qhov tshwm sim zoo ib yam
Dab tsi yog cov ntsiab lus ntawm crystal symmetry?
Yog li, cov siv lead ua no muaj cov ntsiab lus hauv qab no: 1 - 4-fold rotation axis (A4) 4 - 2-fold rotation axes (A2), 2 txiav lub ntsej muag & 2 txiav cov npoo. 5 daim iav dav hlau (m), 2 txiav hla lub ntsej muag, 2 txiav los ntawm cov npoo, thiab ib qho txiav kab rov tav los ntawm qhov chaw
Dab tsi yog rotational symmetry hauv geometry?
Rotational Symmetry. Ib daim duab muaj Rotational Symmetry thaum nws tseem zoo li qub tom qab qee qhov kev sib hloov (tsawg dua ib qho tig tag nrho)
Lub luag haujlwm ntawm symmetry hauv physics yog dab tsi?
Ib qho tseem ceeb tshaj qhov cuam tshuam ntawm symmetry inphysics yog qhov muaj nyob ntawm txoj cai kev txuag. Rau txhua lub ntiaj teb txuas ntxiv symmetry - piv txwv li, kev hloov pauv ntawm aphysical system uas ua tib yam li txhua qhov chaw thiab txhua lub sijhawm - muaj qhov cuam tshuam rau lub sijhawm ywj pheej kom muaj nuj nqis: aconserved charge