Fei at 21:24, 15 November 2006

2006-11-15T21:24:20Z

← Older revision		Revision as of 21:24, 15 November 2006
Line 30:		Line 30:
	PrevLSState[3]		PrevLSState[3]
	Legends:		Legends:
	LSStateTypes = {0:Uncolonised, 1:Producer, 2:Consumer}		LSStateTypes = {0:Uncolonised, 1:Producer, 2:Consumer}
	Global Variables:		Global Variables:
	pInitialProducer = 0.01		pInitialProducer = 0.01
Line 43:		Line 43:

	===consumer.lse===		===consumer.lse===
	// Process based definition for consumber behaviour in producer/consumer model		// Process based definition for consumber behaviour in producer/consumer model
	LSEVENT: Consumder		LSEVENT: Consumder
	DEFINITIONS		DEFINITIONS
	LAYER: LSState, PrevLSState		LAYER: LSState, PrevLSState
	GLOBAL CONSTANT: Uncolonised, Producer, Consumer		GLOBAL CONSTANT: Uncolonised, Producer, Consumer
	GLOBAL VARIABLE: pInitialConsumer, pSpreadConsumer, pDeathConsumer //, SpreadRateConsumer		GLOBAL VARIABLE: pInitialConsumer, pSpreadConsumer, pDeathConsumer //, SpreadRateConsumer
	ENDDEF		ENDDEF
	// Just start once		// Just start once
	RETURNTIME = 0		RETURNTIME = 0
	// Initialize in an empty cell		// Initialize in an empty cell
	PROBINIT = IF LSState EQ Uncolonised THEN pInitialConsumer ELSE 0		PROBINIT = IF LSState EQ Uncolonised THEN pInitialConsumer ELSE 0
	TRANSITIONS		TRANSITIONS
	// Decide if this cell survives		// Decide if this cell survives
Line 69:		Line 69:
	ENDSL		ENDSL
	SPREADPROB		SPREADPROB
	// Always spread to the same cell (self), and spread probabilistical to neighbouring producer cells		// Always spread to the same cell (self), and spread probabilistical to neighbouring producer cells
	SPREADPROB = IF Location EQ (SOURCE Location) THEN 1		SPREADPROB = IF Location EQ (SOURCE Location) THEN 1
	ELSE IF PrevLSState EQ Producer THEN pSpreadConsumer		ELSE IF PrevLSState EQ Producer THEN pSpreadConsumer
	ELSE 0		ELSE 0
	ENDSP		ENDSP

	===producer.lse===		===producer.lse===
	// Process based definiton of producer behaviour in producer/consumer model		// Process based definiton of producer behaviour in producer/consumer model
	LSEVENT: Producer		LSEVENT: Producer
	DEFINITIONS		DEFINITIONS
	LAYER: LSState, PrevLSState		LAYER: LSState, PrevLSState
	GLOBAL CONSTANT: Uncolonised, Producer, Consumer		GLOBAL CONSTANT: Uncolonised, Producer, Consumer
	GLOBAL VARIABLE: pInitialProducer, pSpreadProducer, pDeathProducer //, SpreadRateProducer		GLOBAL VARIABLE: pInitialProducer, pSpreadProducer, pDeathProducer //, SpreadRateProducer
	ENDDEF		ENDDEF
	// Just start once		// Just start once
	RETURNTIME = 0		RETURNTIME = 0
	// Initialize in an empty cell		// Initialize in an empty cell
	PROBINIT = IF LSState EQ Uncolonised THEN pInitialProducer ELSE 0		PROBINIT = IF LSState EQ Uncolonised THEN pInitialProducer ELSE 0
	TRANSITIONS		TRANSITIONS
	// Decide if this cell survives		// Decide if this cell survives
Line 99:		Line 99:
	SPREADTIMESTEP = 1 //SpreadRateProducer		SPREADTIMESTEP = 1 //SpreadRateProducer
	SPREADLOCATION		SPREADLOCATION
	notEaten = PrevLSState EQ Producer // check that the producer wasn't eaten during the last step		notEaten = PrevLSState EQ Producer // check that the producer wasn't eaten during the last step
	REGION CENTRED(0, 1, WRAPPED)		REGION CENTRED(0, 1, WRAPPED)
	DECISION notEaten // don't spread if eaten (i.e. stop process)		DECISION notEaten // don't spread if eaten (i.e. stop process)
	ENDSL		ENDSL
	SPREADPROB		SPREADPROB
	// Always spread to the same cell (self), and spread probabilistically to empty neighbouring cells		// Always spread to the same cell (self), and spread probabilistically to empty neighbouring cells
	SPREADPROB = IF Location EQ (SOURCE Location) THEN 1 // spread to same cell		SPREADPROB = IF Location EQ (SOURCE Location) THEN 1 // spread to same cell
	ELSE IF PrevLSState EQ Uncolonised THEN pSpreadProducer		ELSE IF PrevLSState EQ Uncolonised THEN pSpreadProducer
	ELSE 0		ELSE 0
	ENDSP		ENDSP

	~~===update.lse===~~
	~~// Event to update time step~~
	~~LSEVENT: Update~~
	~~DEFINITIONS~~
	~~LAYER: LSState, PrevLSState~~
	~~ENDDEF~~
	~~RETURNTIME~~
	~~RETURNTIME = 1~~
	~~PrevLSState = LSState~~
	~~ENDRT~~
	~~NUMCLUSTERS = 0~~

	==Suggested Experiments==		==Suggested Experiments==

	To explore this cellular automata model further, try the following:		To explore this cellular automata model further, try the following:

Fei at 21:03, 15 November 2006

2006-11-15T21:03:05Z

New page

==Summary==

==Screenshot==

[[Image:Consumer.gif]]

==Download Model==

Download the .scn, .sel and .lse files by clicking on the following link: [[Image:ProducerConsumer.zip]]

==Model Code Exploration==

In the following sections we will examine all of the model files for this model. Note that instead of downloading the zip file above, you could just copy the text in the boxes below into a text editor and save it with the appropriate name (Section title). Opening the resulting .scn file in the SELES simulator would run this model.

===Consume.scn===
Seles Scenario
Model.sel
SimPriority Low Priority

===Model.sel===
Seles Model
Time Units: Step kiloStep 1000 1000
Landscape Events:
Producer.lse DEBUG
Consumer.lse DEBUG
Update.lse DEBUG
Spatial Variables:
LSState[3]
PrevLSState[3]
Legends:
LSStateTypes = {0:Uncolonised, 1:Producer, 2:Consumer}
Global Variables:
pInitialProducer = 0.01
pInitialConsumer = 0.01
pSpreadProducer = 0.1
pSpreadConsumer = 0.2
pDeathProducer = 0.01
pDeathConsumer = 0.05
// SpreadRateProducer = 1
// SpreadRateConsumer = 1
Output Frequency: 1

===consumer.lse===
// Process based definition for consumber behaviour in producer/consumer model
LSEVENT: Consumder
DEFINITIONS
LAYER: LSState, PrevLSState
GLOBAL CONSTANT: Uncolonised, Producer, Consumer
GLOBAL VARIABLE: pInitialConsumer, pSpreadConsumer, pDeathConsumer //, SpreadRateConsumer
ENDDEF
// Just start once
RETURNTIME = 0
// Initialize in an empty cell
PROBINIT = IF LSState EQ Uncolonised THEN pInitialConsumer ELSE 0
TRANSITIONS
// Decide if this cell survives
Dies = UNIFORM(0,1) < pDeathConsumer
// If the consumer is dying
IF Dies
LSState = Uncolonised
ENDFN
TRANSITIONS = !Dies
LSState = Consumer
ENDTR
SPREADTIMESTEP = 1 //SpreadRateConsumer
SPREADLOCATION
REGION CENTRED(0,1, WRAPPED)
ENDSL
SPREADPROB
// Always spread to the same cell (self), and spread probabilistical to neighbouring producer cells
SPREADPROB = IF Location EQ (SOURCE Location) THEN 1
ELSE IF PrevLSState EQ Producer THEN pSpreadConsumer
ELSE 0
ENDSP

===producer.lse===
// Process based definiton of producer behaviour in producer/consumer model
LSEVENT: Producer
DEFINITIONS
LAYER: LSState, PrevLSState
GLOBAL CONSTANT: Uncolonised, Producer, Consumer
GLOBAL VARIABLE: pInitialProducer, pSpreadProducer, pDeathProducer //, SpreadRateProducer
ENDDEF
// Just start once
RETURNTIME = 0
// Initialize in an empty cell
PROBINIT = IF LSState EQ Uncolonised THEN pInitialProducer ELSE 0
TRANSITIONS
// Decide if this cell survives
Dies = UNIFORM(0,1) < pDeathProducer
// If the producer is dying
IF Dies
LSState = Uncolonised
ENDFN
TRANSITIONS = (!Dies)
LSState = Producer
ENDTR
SPREADTIMESTEP = 1 //SpreadRateProducer
SPREADLOCATION
notEaten = PrevLSState EQ Producer // check that the producer wasn't eaten during the last step
REGION CENTRED(0, 1, WRAPPED)
DECISION notEaten // don't spread if eaten (i.e. stop process)
ENDSL
SPREADPROB
// Always spread to the same cell (self), and spread probabilistically to empty neighbouring cells
SPREADPROB = IF Location EQ (SOURCE Location) THEN 1 // spread to same cell
ELSE IF PrevLSState EQ Uncolonised THEN pSpreadProducer
ELSE 0
ENDSP

===update.lse===
// Event to update time step
LSEVENT: Update
DEFINITIONS
LAYER: LSState, PrevLSState
ENDDEF
RETURNTIME
RETURNTIME = 1
PrevLSState = LSState
ENDRT
NUMCLUSTERS = 0

==Suggested Experiments==

To explore this cellular automata model further, try the following:

The process model - Revision history

Fei at 21:24, 15 November 2006

Fei at 21:03, 15 November 2006