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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,* p$ C0 N; |5 @4 W. F& l7 u
  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.
5 G2 b& T0 b) ^* J# d3 ], c  Loads are processed by each operator for the following time:
3 D7 J( E' m  }! O6 y  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.
( S0 A; [; O# E+ b4 N  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.
( c5 t; U3 T- z8 s' i4 [  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.
0 T1 T) \4 F* X( g/ pSend 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.' F9 K0 V' e, u2 \- n1 ~
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问题:# i$ T% [0 B4 w
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$ ]! o2 `. y. K7 D
move into Q_wait /*Capacity is infinte*/
# {# _! n# {$ r6 A" t: B6 Umove into Q_process /*Single capacity*/
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use R_A for n 60,10 min /*Resource A*/
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send to P_B8 u4 J' B3 o* B) i# l
end
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" f6 b6 u+ q! W2 F$ p. n! l( y( QP_B and P_C is similar
8 {9 N9 B7 w" x: Q% }0 r! Ytriangular 30,60,90 min7 T* m9 ]9 C! P* D3 ^( g6 G& ^9 C
u 60,30 min: J+ ^  E; \9 I7 `( [
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! y8 P8 ]1 O9 j- C: M9 f: Sin 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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# W  u; L  A/ b! P! oRemember 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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