Diskretieji Dinamikos Modeliai Flashcards

1
Q

Kas yra dinamine sistema

A

matematinis modelis apibudinantis tiriamo reiskinio raida begant laikui

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2
Q

Dinamine sistema diskrecioji jei

A

Jei reiskinio yoatybes pakanka tirti tik atskirais momentais

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3
Q

Kas sudaro diskrecia dinamine sistema

A

1) reiskini apibudinantys rodikliai

2) raidos taisykle suilsiejanti rodiklio reiksmes skirtingais laiko momentais

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4
Q

Kaip raidos taisykle vadinama ir kodel

A

Skirtumu lygtimi nes ji apibudina tiriamo reiskinio pokyti

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5
Q

Skirtumu lygtis bendruoju atveju

A

Xt-1 = f(Xt)

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6
Q

Tiesine skirtumone lygtis ir jos pagrindine savybe

A

Xt+1=aXt + b

(t=0,1,2,…)

Tiesine lygties pagrindine savybe veiksmai sudedami ar atimami

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7
Q

Kada skirtumine lygtis vadinama homogenine

A

Kuomet koef b=0

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8
Q

Kada lygtis nehomogenine

A

Jei koef b≠0

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9
Q

Skirtumu lygties Xt+1 =aXt+b sprendinys yra

A

Diskrecioji funkcija Xt=X(T) tenkinanti lygti

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10
Q

Tiesines homogenines lygtoes sprendinys bendruoju atveju

A

Geometrinė progresja isreiksta rodikline funkcina
Lygties Xt+1 = aXt sprendinys yra diskrecioji funkcija Xt=a^t • Xo ,kurios argumentas t yra bet kuris teigiamas sveikasis sk (t=1,2,3..)

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11
Q

Logistinio raidos modelio pavyzdziai

A
  • logistinis populiacijos raidos modelis
  • logistinis informacijos sklaidos modelis
  • rinkos skverbties modelis
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12
Q

Kada buna dinamine sistema

A

Jei yra St+1 ir St tai dinamine sistema

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13
Q

Kas yra dinamines sistemos busena ir kas yra fazine erdvė jei stebimas kintamasis St

A

kiekviena konkreti St reiksmė yra dinamine busena. O visa busenu aibe fazinė erdvė

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