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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,! z5 w0 N! N1 s, o, _! B% I2 i
  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.& k$ z, l, n8 L; Y6 T4 l
  Loads are processed by each operator for the following time:: ^; |5 g2 z2 |6 Z. A
  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins." x9 T- y6 h4 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.
% d7 ~4 V" m* F' t: K3 ^, x  Worker_C does the job in a uniformly distributed time between 30 and 90 mins./ r6 ~- v0 g4 H. {: U# D1 y
Send 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.# r; g3 t# o; t( d/ P

, {: C) z2 \" ~1 D5 {6 N* g问题:* |9 C* K' h# ^% V% C6 q4 M7 p
After running the model for 10,000 days, what was the average number of loads in each process?
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发表于 2009-10-6 22:36:13 | 显示全部楼层
begin P_A arriving
, R/ h. A8 Z9 ^3 T9 `4 pmove into Q_wait /*Capacity is infinte*/( B6 @4 x9 a% j% ]3 y" I/ r
move into Q_process /*Single capacity*/$ I; i0 U7 R  i: a6 z

# }* ~- t* I/ D6 d5 ?4 a" nuse R_A for n 60,10 min /*Resource A*/
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send to P_B
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P_B and P_C is similar
) T+ W) F0 R1 Y+ Ptriangular 30,60,90 min
  E8 S7 [! S' L+ Du 60,30 min  b. }4 Q" r, C) o* p" `! B! D
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in P_C, you need to send to die.( x$ W0 p- Q0 w. B& g8 E: r

; d- \& Q7 o) U, uThen You need to add a L_Control to drive up the whole simulation. and a Run Control of 10000 days.
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  A# ~6 a2 ~7 f/ p! i1 }7 xRemember 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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