Puas yog ib qho kev ua haujlwm piecewise linear?

2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36

A piecewise linear muaj nuj nqi yog a muaj nuj nqi tsim los ntawm qee tus lej kab tawm ntu txhais tau hais tias muaj ntau qhov sib npaug ntawm cov ntu, feem ntau yog sib npaug.

Nyob rau hauv no txoj kev, dab tsi yog piecewise linear qauv?

Qhov no approximation qauv hauv qhov tsis yog kab tawm cuab yeej coj li ib kab tawm ib qho rau ib qho tshwj xeeb ntawm voltages yog hu ua piecewise linear qauv ntawm ib tug tsis kab tawm ntaus ntawv. Nws tus yam ntxwv I-V zoo ib yam li ntawm a kab tawm resistor, uas yog, nws qhov voltage nce linearly nrog qhov nce hauv nws tam sim no.

Tsis tas li ntawd, dab tsi yog ib daim ntawv qhia piecewise? A daim ntawv -Definition function yog ib qho uas txhais tsis yog ib leeg xwb kev sib npaug , tab sis los ntawm ob lossis ntau dua. Txhua kev sib npaug yog siv tau rau qee lub sijhawm.

Ua raws li qhov no hauv kev xav, dab tsi yog qhov piv txwv ua haujlwm zoo?

A piecewise muaj nuj nqi yog a muaj nuj nqi uas yog txhais nyob rau hauv ib theem zuj zus. Ib qho piv txwv yog tus nqi tiag, (1) Piecewise muaj nuj nqi yog siv nyob rau hauv Wolfram Language li Piecewise [val1, cond1, val2, cond2,].

Dab tsi yog qhov tseem ceeb ntawm niam txiv txoj haujlwm?

Ib tag nrho muaj nuj nqis muaj nuj nqi yog a muaj nuj nqi uas muaj ib qho kev qhia algebraic hauv tus nqi kiag cim. Nco qab tias lub tus nqi kiag ntawm tus lej yog nws qhov kev ncua deb ntawm 0 ntawm tus lej kab. Cov muaj nuj nqis niam txiv muaj nuj nqi , sau li f(x)=| x |, txhais tau tias. f(x)={x if x>00 if x=0−x if x<0.