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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,
4 _7 A  D1 K4 N- ]! W- t! C8 h  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.
. X/ Z! Z6 S  R5 ?  U: u+ D  @7 m  Loads are processed by each operator for the following time:% b9 d" n7 m2 J  p2 }
  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.
2 o  `) L# t, Z: {6 J+ [0 w3 z  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.
/ i4 q( K3 j9 a2 w- l7 \  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.
9 R& ?  y) G5 B5 D  ESend 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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问题:
, Z) R8 P+ C. }: N6 i! KAfter running the model for 10,000 days, what was the average number of loads in each process?
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不胜感激!
发表于 2009-10-6 22:36:13 | 显示全部楼层
begin P_A arriving+ o2 Z. a- b, D3 Q6 C' |) V' `
move into Q_wait /*Capacity is infinte*/
8 I: ^( ]+ H# Q( b9 \  Q) Rmove into Q_process /*Single capacity*/; W) F- N: B4 v& f% P; A6 t" C
" p, Q) @& r/ m2 `. O& B2 b, {
use R_A for n 60,10 min /*Resource A*/' a' W7 j9 e% W  n4 g: V% C1 j

" w% i1 ?6 ]+ D* c( S  \2 q. e8 U" X! usend to P_B2 `9 W; Q4 B  Q
end* \* R1 J5 d3 q  ]( @9 I/ [7 ?

# a+ t+ Y/ _, k' I+ e/ y: FP_B and P_C is similar$ \3 h8 D/ d7 A" T* W
triangular 30,60,90 min9 K( S) U% N  C
u 60,30 min
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1 _! y+ E3 z8 ain P_C, you need to send to die.
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. v6 Q) `5 r0 W. gThen You need to add a L_Control to drive up the whole simulation. and a Run Control of 10000 days.
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Remember 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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