2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Variation of parameters, general method for find a particular solution of a differential equation by replace the constants in the solution of a related (homogeneous) equation by functions and txiav txim siab rau cov dej num no kom cov thawj qhov sib txawv sib npaug yuav txaus siab.
Koj txhais li cas los ntawm kev hloov pauv ntawm cov ntsuas?
: ib txoj hauv kev los daws qhov sib npaug sib txawv los ntawm kev daws qhov kev sib npaug yooj yim dua thiab tom qab ntawd nthuav dav qhov kev daws teeb meem no kom zoo kom ua tiav qhov kev sib npaug qub los ntawm kev kho qhov tsis sib xws tsis tas li tab sis raws li qhov sib txawv.
Thaum twg koj tuaj yeem siv txoj kev hloov pauv ntawm cov ntsuas?
Txoj kev ntawm kev hloov pauv ntawm qhov tsis muaj, cov kab ke ntawm kev sib npaug, thiab Cramer txoj cai. Zoo li cov qauv ntawm cov coefficients uas tsis tau txiav txim siab, qhov kev hloov pauv ntawm qhov tsis sib txawv yog ib txoj hauv kev uas koj tuaj yeem siv los nrhiav kev daws teeb meem rau qhov kev txiav txim thib ob (lossis siab dua) kev sib npaug tsis sib xws.
Puas hloov pauv ntawm qhov ntsuas ib txwm ua haujlwm?
Yog kuv nco qab kom raug, undetermined coefficients tsuas ua hauj lwm yog hais tias lub inhomogeneous lub sij hawm yog ib tug exponential, sine/cosine, los yog ib tug ua ke ntawm lawv, thaum Variation ntawm Parameters ib txwm ua haujlwm, tab sis kev lej yog qhov nyuaj me ntsis.
Dab tsi yog qhov sib txawv ntawm qhov sib txawv?
Cia f ua ib qho kev sib npaug sib npaug nrog cov kev daws teeb meem F. Ib qho kev ntsuas ntawm F yog qhov kev txiav txim siab tas li tshwm sim los ntawm kev daws qhov qubthaum lub sij hawm tau txaiskev daws ntawm f.
Pom zoo:
Thaum lub sijhawm ntsuas kev ntsuas thawj zaug yog ntsuas los ntawm kev ntsuas?
Thaum qhov kev ntsuam xyuas thawj zaug, kev ncig yog ntsuas los ntawm kev ntsuam xyuas: pulse zoo, los ntshav sab nraud, thiab tawv nqaij. Yuav ntsuas dab tsi thaum lub sijhawm ntsuas thawj? rau qhov ntawm qhov kev ntsuam xyuas thawj zaug yog:
Qhov kev hloov pauv no puas yuav ua rau muaj kev hloov pauv hloov pauv?
Yog li, yog tias muaj kev hloov pauv, piv txwv li, kev ntxig lossis tshem tawm ntawm nucleotide, tshwm sim, qhov no tuaj yeem ua rau kev hloov pauv ntawm kev nyeem ntawv. Nws hloov tag nrho cov amino acid ib ntus. Cov kev hloov pauv no yog hu ua frameshift mutation (tseem hu ua kev nyeem ntawv hloov pauv, nyeem ntawv hloov pauv, lossis framing yuam kev).
Qhov twg yog qhov kev hloov pauv hloov pauv hloov pauv?
Semiconservative replication piav qhia txog cov txheej txheem ntawm DNA replication nyob rau hauv tag nrho cov paub hlwb. DNA replication tshwm sim ntawm ntau lub hauv paus pib ntawm kev rov ua dua raws DNA qauv strand. Raws li DNA ob chav helix yog unwound by helicase, replication tshwm sim nyias ntawm txhua tus qauv strand nyob rau hauv antiparallel cov lus qhia.
Qhov kev hloov pauv twg yog xav tias yuav cuam tshuam los ntawm kev hloov pauv hloov pauv?
Dependent Variable Qhov sib txawv uas nyob ntawm lwm yam uas ntsuas. Cov kev hloov pauv no yuav tsum tau hloov pauv raws li qhov kev sim ua haujlwm ntawm tus kheej hloov pauv lossis hloov pauv. Nws yog cov nyhuv presumed. Qhov kev tshawb fawb hloov pauv twg yog qhov tshwm sim?
Los ntawm kev hloov pauv hloov pauv hloov pauv?
Kev hloov pauv hloov pauv hloov pauv (TMA) yog qhov isothermal (tsis hloov pauv nucleic acid kub), ib leeg-tube nucleic acid amplification system siv ob lub enzymes, RNA polymerase thiab thim rov qab kev sau ntawv. … Cov txheej txheem no tuaj yeem siv los tsom rau RNA thiab DNA.
