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.dsy:it. : Powered by vBulletin version 2.3.1 .dsy:it. > Didattica > Corsi N - Z > Ricerca operativa > [ESERCIZI] Problema dello zaino
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GiObAT
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[Problema dello zaino]

Chi ha risolto l'esercizio 5 dell'ultimo tema d'esame, cioè quello relativo al problema dello zaino?

diciamo ke il primo passo lo so fare ma poi???

elemento critico s=4
b_segnato=10-7=3
UB0=6+8+3+3*6/=20.6
x0=(1,1,1,3/5,0)

[0]---x3=0---[1]

e ora? :D

03-04-2006 00:10
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0m4r
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Sempre in tema del problema dello zaino... qualcuno mi può spiegare come sono stati fatti i calcoli nell'esercizio svolto a lezione quando i vari xi=1? E quale è la regola per disegnare il grafico?

grazie

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08-06-2006 17:58
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Bulma
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Cos'è esattamente che non capisci dei calcoli? Forse potrei ancora ricordarmi qualcosa del problema dello zaino, se mi rinfreschi la memoria :D

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09-06-2006 11:58
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0m4r
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...diciamo che non so proprio che calcoli fare se xi=1

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09-06-2006 12:11
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Bulma
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Beh, se xi = 1, significa che l'oggetto corrispondente deve essere messo (intero) nello zaino. Una volta inserito quello, ricominci a riempire lo zaino a partire dall'oggetto più conveniente (quello avente rapporto valore/peso maggiore, se non ricordo male) finchè lo zaino non è pieno (con eventualmente anche frazioni di oggetto).
Ho capito bene il problema?

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09-06-2006 14:23
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0m4r
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grazie del chiarimento... ora ne sto discutendo via msn... qualche cosa in più mi si è chiarita!

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09-06-2006 14:29
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ripe
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Ma se al primo passo trovo già una soluzione intera come procedo?

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10-02-2007 16:02
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ripe
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Questo Bed&Breakfast mi sta facendo impazzire! :(

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10-02-2007 18:22
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