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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," Z4 P7 ~, R  m% O- J4 a7 g  R8 R
  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.; s, `/ Y3 A, T6 k8 e" ~( _% j
  Loads are processed by each operator for the following time:
/ _3 d, _( G3 U* r5 u  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.
  H; u3 @% u3 e/ m  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.6 p/ n6 _* T/ @- I' }; G
  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.8 B9 i7 j0 P, N9 H
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.
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问题:& Y7 m) m4 Z$ Z2 C2 _: s4 ~. t* n
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 arriving2 O4 `8 j3 e, h. s! B* i$ v
move into Q_wait /*Capacity is infinte*/% K# {+ K* d* k* v* @
move into Q_process /*Single capacity*/6 G. a* C1 ]/ K' C3 k$ {
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use R_A for n 60,10 min /*Resource A*/+ b! `$ g% t6 w+ I' ?: w2 A
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send to P_B
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P_B and P_C is similar
  _! D  ^4 _# L7 M7 P; Q/ ytriangular 30,60,90 min, V9 c/ g/ z( f& K4 M
u 60,30 min7 c# D) y  y! u8 s$ j# e% Z: b
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9 R8 ?+ k4 A/ a' V. Qin 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.
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3 v/ @. t( j4 A, G: k0 f2 g$ `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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