diagrammi e riduzioni

anno3/vpc/consegne/2/2.pn.org

@@ -48,7 +48,24 @@ stesso padre nei seguenti modi:
 - usando reti WN
 
 
-** TODO Riduzione
+** Riduzione
+Una rete di petri puo` essere ridotta usando le seguendi tecniche:
+- fusione
+- eliminazione
+- rimozione dei loop
+Nelle figure vengono mostrate alcune fasi di riduzione della rete in
+analisi; in ordine sono stati applicati:
+- fusione di alcuni posti
+- fusione di alcune transizioni
+- eliminazione di alcuni posti
+- eliminazione di alcune transizioni
+- riduzione di self loop
+
+[[./riduzioni/fusione1.jpg]]
+[[./riduzioni/fusione2.jpg]]
+[[./riduzioni/eliminazione1.jpg]]
+[[./riduzioni/eliminazione2.jpg]]
+[[./riduzioni/rimozione1.jpg]]
 ** TODO P e T invarianti
 Tramite GreatSPN possiamo calcolare gli T- e P- semiflussi
 
@@ -194,4 +211,27 @@ associati ciascuno ad un master diverso.
 [[./reteD.jpg]]
 
 ** TODO P e T invarianti
-** TODO Decision Diagram
+** Decision Diagram
+L'efficacia dei decision diagram sulla generazione dello stato degli
+spazi dipende fortemente dall'ordine delle variabili.
+Di seguito vengono mostrati i decision diagram usando per le
+assegnazioni i seguenti algoritmi:
+- Sloan: un algoritmo di riduzione della banda di matrici sparse con
+  una buona performance
+- (advanced) Cuthill-McKee: un altro algoritmo di riduzione della banda di
+  matrici sparse
+-  Tovchigrechko e Noack: due algoritmo appositamente ideati per le reti
+  di Petri, anch'essi con una buona performance
+- P-chaining: un algoritmo che sfrutta le informazioni strutturali
+  della rete ma ha una bassa performance
+- Gradient-P
+- Gibbs-Poole-Stockmeier: un altro algoritmo matriciale che nella rete
+  in analisi ha restituito il risultato peggiore
+ 
+[[./diagrammi/sloan.jpg]]
+[[./diagrammi/mckee.jpg]]
+[[./diagrammi/tovchi.jpg]]
+[[./diagrammi/noack.jpg]]
+[[./diagrammi/p-chain.jpg]]
+[[./diagrammi/gradient.jpg]]
+[[./diagrammi/gibbs.jpg]]

anno3/vpc/gspn/EsD-Measures.solution/PT-DD-0.dot

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todo.org

@@ -9,6 +9,8 @@
 - [ ] analisi
 - [ ] uppal
 - [ ] controlla esercizi nuovi
+- [ ] Chiedi perche` non riesci a riprodurre  ivariable ordering
+  mostrati da euristica
 - [ ] Controlla bene e studia Symbolic Reachability Graph: perche`
   cosi` buono?