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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,
; H) `2 H' R3 r. Y  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.% o/ g. ?6 H0 l4 s
  Loads are processed by each operator for the following time:
/ j  Q' {8 e+ f. _2 c  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.
7 L/ b4 a3 ?9 D  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.. ~  H) ~+ `% m0 x. O- e2 F
  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.
4 l: j3 M& M8 _! \4 L2 E# 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.% d8 ~, y  G. M9 v: K2 y
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问题:
; H8 p5 N$ c5 RAfter running the model for 10,000 days, what was the average number of loads in each process?" T. Q" F  ^. v8 S
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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' \. I3 u" V! M, x+ S, `
move into Q_wait /*Capacity is infinte*/
+ w8 b6 [5 S/ y( P/ l" a/ fmove into Q_process /*Single capacity*/
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% Q* e  A; Q: E# S- @6 G1 @! Zuse R_A for n 60,10 min /*Resource A*/& `2 w/ D3 x/ x4 l- t5 i3 ^/ y
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send to P_B: ^. i' Y; |* ?% n
end
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P_B and P_C is similar9 O2 g4 K" ~3 l7 {6 X
triangular 30,60,90 min
% i6 D# }- x* M2 ^# `" [: cu 60,30 min
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: J+ o+ Z, ~' m7 Rin 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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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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