Video: Lub ntsiab lus ntawm kev hloov pauv hauv kev txheeb cais yog dab tsi?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Dab tsi yog Variability hauv Kev txheeb cais ? Variability (tseem hu ua kis los yog dispersion) yog hais txog kev nthuav tawm cov ntaub ntawv li cas. Variability muab txoj hauv kev los piav qhia ntau npaum li cas cov ntaub ntawv sib txawv thiab tso cai rau koj siv txheeb cais los sib piv koj cov ntaub ntawv rau lwm cov ntaub ntawv.
Tom qab ntawd, ib tug kuj yuav nug, qhov ntsuas ntawm kev hloov pauv txhais li cas?
ntsuas ntawm variation Qhov ntau uas qhia tus nqi ntawm kev hloov pauv nyob rau hauv ib tug random variable (piv ntsuas ntawm qhov chaw). Kev ntsuas ntawm kev hloov pauv yog ob qho khoom ntawm qhov kev faib tawm qhov tshwm sim lossis cov qauv kwv yees ntawm lawv. Qhov ntau ntawm cov qauv yog qhov sib txawv ntawm qhov loj tshaj thiab qhov tsawg tshaj plaws.
Qhov thib ob, qhov sib txawv qhia peb li cas? Variance ntsuas deb npaum li cas ib pawg ntawm cov ntaub ntawv nthuav tawm. Ib siab sib txawv qhia tau hais tias cov ntsiab lus cov ntaub ntawv yog kis tau los ntawm qhov nruab nrab, thiab los ntawm ib leeg. Variance yog qhov nruab nrab ntawm cov squared nrug ntawm txhua qhov taw tes mus rau qhov nruab nrab.
Kuj tseem paub yog, qhov kev ntsuas ntawm kev hloov pauv yog dab tsi thiab vim li cas lawv tseem ceeb?
MEASURES NTAWM VARIABILITY. Ib qho tseem ceeb ntawm kev siv cov txheeb cais yog ntsuas qhov sib txawv los yog kev sib kis ntawm cov ntaub ntawv. Piv txwv li, ob qhov kev ntsuas ntawm qhov sib txawv yog tus qauv sib txawv thiab qhov ntau . Tus qauv sib txawv ntsuas qhov sib kis ntawm cov ntaub ntawv los ntawm qhov nruab nrab lossis qhov qhab nia nruab nrab.
Lub hom phiaj ntawm kev ntsuas kev sib txawv yog dab tsi?
Kev ntsuas ntawm kev hloov pauv yog siv los piav txog kev faib cov ntaub ntawv. Qhov ntau yog qhov sib txawv ntawm cov ntaub ntawv loj tshaj plaws thiab qhov tsawg tshaj plaws. Quartiles yog qhov tseem ceeb uas faib cov ntaub ntawv rau hauv plaub qhov sib npaug.
Pom zoo:
Lub ntsiab lus ntawm lub hauv paus lo lus meter nyob rau hauv lo lus tus pas ntsuas kub yog dab tsi?
Lub hauv paus chiv keeb ntawm lo lus 'Thermometer' Qhov thib ob ntawm lo lus, 'meter', los ntawm Fabkis -mètre (uas muaj nws cov hauv paus hauv lub post-classical Latin: -meter, -metrumand lub ancient Greek, -Μέτρο ν, lossis metron, uas txhais tau tias ntsuas qee yam, xws li qhov ntev, qhov hnyav, lossis dav)
Dab tsi yog qhov txawv ntawm ib puag ncig kev hloov pauv thiab kev hloov pauv qub txeeg qub teg?
Qhov sib txawv ntawm cov yam ntxwv ntawm cov tib neeg ntawm tib hom yog hu ua variation. Qhov no yog inherited variation. Qee qhov kev hloov pauv yog qhov tshwm sim ntawm qhov sib txawv ntawm ib puag ncig, lossis ib tus neeg ua dab tsi. Qhov no yog hu ua environmental variation
Dab tsi yog qhov ua rau muaj kev hloov pauv hauv kev tswj cov txheej txheem txheeb cais?
'Ib qho laj thawj' kev hloov pauv yog qhov kev hloov pauv uas xav tias yuav muaj nyob rau hauv cov txheej txheem ruaj khov thiab feem ntau yog vim qhov yuam kev xws li kev kaw lossis ntsuas qhov yuam kev. Cov peev txheej ntawm qhov yuam kev no yuav tshwm sim tsis hais txog lwm yam, thiab yuav ua rau muaj qhov sib txawv me ntsis ntawm kev ntsuas
Thaum ib qho kev sib cais ua rau muaj kev hloov pauv hloov pauv ntawm lub ntiaj teb nce ntxiv?
Txij li thaum lub kaw lus raug cais tawm, tsis muaj cua sov tuaj yeem khiav tawm (tus txheej txheem yog li adiabatic), yog li thaum lub zog ntws tawm hauv lub cev, qhov entropy ntawm qhov system nce, piv txwv li Δ Ssys> 0. Yog li ntawd, lub entropy ntawm lub system yuav tsum tau nce rau ib tug spontaneous txheej txheem nyob rau hauv no cais system
Dab tsi yog lub ntsiab lus ntawm kev hloov pauv lom neeg hauv cov ntsiab lus ntawm allele zaus?
Microevolution, los yog evolution ntawm ib tug me me, yog txhais raws li ib tug kev hloov nyob rau hauv lub zaus ntawm noob variants, alleles, nyob rau hauv ib tug pej xeem ntau tiam. Lub teb ntawm biology uas kawm txog allele frequencies nyob rau hauv cov pejxeem thiab yuav ua li cas lawv hloov lub sij hawm yog hu ua pej xeem noob caj noob ces