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[求助] 本人初学auto mod,有一道题目希望大家赐教

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发表于 2009-10-3 15:08:34 | 显示全部楼层 |阅读模式
刚刚开始学auto mod,这道题目搞不明白,希望大家看看 题目是这样的,
' E( m/ ]  d4 D/ N" G  Create a new model containing three independent processes, each with one operator. In each process, loads first move into an infinite capacity waiting queue, then into a single-capacity processing queue.' O. n- Z; F# _* e' m, r( o
  Loads are processed by each operator for the following time:
4 Q$ G1 i. G0 W, }6 o  q8 J% w  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.
5 F+ v- ~0 u, k+ M' v  Worker_B does the job according to a triangular distribution with a min of 30 mins, most likely value of 60 mins, and a max of 90 mins.! z; p/ ^1 C* W# A$ F
  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.
( _+ e/ O- H3 R- @% L7 hSend loads to each pocess at the same rate (an exponentially distributed inter-arrival time with a mean of 68 mins) to understand the difference in the processing times of the three workers.
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; t% }. r# }8 m1 y问题:
' \) |" b+ }7 U) i7 DAfter running the model for 10,000 days, what was the average number of loads in each process?
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/ l3 R1 {) U6 T/ s不胜感激!
发表于 2009-10-6 22:36:13 | 显示全部楼层
begin P_A arriving8 [! M" L' I2 q6 {
move into Q_wait /*Capacity is infinte*/0 \! _2 ?) L5 s- s  B
move into Q_process /*Single capacity*/
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; q* e! @/ K7 Q: s" S" P: muse R_A for n 60,10 min /*Resource A*/, W7 r6 `/ ]# {9 f
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send to P_B
1 ^+ ?, l' n. D4 F. }$ e% wend
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1 p( ?7 r/ [- D) e3 z+ M6 FP_B and P_C is similar
/ R& n, P( _6 h$ [: Ztriangular 30,60,90 min
" [5 H- i* h7 O& T9 @9 @4 F9 Vu 60,30 min) B$ O) h/ Z8 p  g
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in P_C, you need to send to die.
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Then You need to add a L_Control to drive up the whole simulation. and a Run Control of 10000 days.. h' t9 W7 ?7 R4 G- y$ {$ L
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. X) s8 ^: q( k% WRemember to turn off the animation before you run your model.

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 楼主| 发表于 2009-10-27 23:53:02 | 显示全部楼层
thanks...
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