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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,0 R. R/ Z0 R5 i) m8 S6 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.# r9 B# `/ G/ d
  Loads are processed by each operator for the following time:
" |, S4 W% z; h( k; `6 H  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.
, x, N+ Y# W5 f5 f; i) |  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.
# Y8 ]' L. `% b  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.
0 X& S; J+ [5 N8 _0 u& D: SSend 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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  z/ D- P9 w+ |9 g. U) t' D问题:
. Z- ~0 A) W" t9 yAfter running the model for 10,000 days, what was the average number of loads in each process?
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7 j8 }9 Z5 Z4 @& T不胜感激!
发表于 2009-10-6 22:36:13 | 显示全部楼层
begin P_A arriving" c0 b" V$ ^5 b% o/ [( G! V6 S$ B: l
move into Q_wait /*Capacity is infinte*/
) y6 o( _. P+ Q$ w9 Cmove 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_B6 p, C0 X9 g" c* Y
end
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P_B and P_C is similar5 S( S  ~  Z4 b. T
triangular 30,60,90 min2 N; S7 \+ Y, N
u 60,30 min) \: }- @" M: J4 b

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in P_C, you need to send to die.* o5 o" R) {- o  e5 q' J# |/ r

" u- M* R5 |9 uThen You need to add a L_Control to drive up the whole simulation. and a Run Control of 10000 days.) ~' ^, s# ~* J* A. T- i
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) I5 P, P/ J" Q3 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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