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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,
9 }( S% \7 q3 u. p  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  H  A( r7 Y: d$ v5 F2 G' ?
  Loads are processed by each operator for the following time:6 ]0 _* v; v  G1 R' @3 F
  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.
, J) i1 o% i- i! C  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.
! U* ~5 g" A) f! z# q3 [  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.
, o' }/ H; ?7 BSend 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./ |- W$ B% x7 C
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问题:  D, P2 X3 f$ e9 u2 K4 [
After 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$ U9 \: s- [! T
move into Q_wait /*Capacity is infinte*/$ n5 Y$ g- `, g2 T' t/ f
move into Q_process /*Single capacity*/
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use R_A for n 60,10 min /*Resource A*/
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; [: p9 {) m- C+ e2 Z. {send to P_B
" K& D+ T6 N! d4 h. k9 b3 l& Q3 bend
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  T+ C* V* V: T8 x1 aP_B and P_C is similar9 |8 }, W4 ~1 N6 k  D! A
triangular 30,60,90 min, n; _8 w. K& j1 B5 L
u 60,30 min
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8 d9 l) O+ S( Z. X- j* ]5 Jin P_C, you need to send to die.5 j* t" |8 N1 z9 U
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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." }" Y: j$ i4 `
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, q" d' i/ J3 T8 ]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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