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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,7 `% E3 {% x9 d. @
  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.
$ D0 U( ]0 o1 J* c0 T7 K5 N  Loads are processed by each operator for the following time:
0 _/ o! h# B( Z9 Z  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.
) F- \  D  `; W4 B- q" p  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.
& i/ d6 Z' m5 g$ `  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.& o7 |) m3 t( ]" x: X, p0 T
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:
0 H( f0 G! ]7 j# s9 J' g9 n7 S6 jAfter running the model for 10,000 days, what was the average number of loads in each process?* f6 H2 E3 w1 ]5 I, \3 \: Y3 M

  ^. q; M9 s8 D% H不胜感激!
发表于 2009-10-6 22:36:13 | 显示全部楼层
begin P_A arriving
' N8 ~9 {4 J- X: {$ wmove into Q_wait /*Capacity is infinte*/
9 E- e  C5 Y" t$ m; K: J! Umove into Q_process /*Single capacity*/5 `1 B3 W0 K: c! o; f/ `2 {6 ]+ @
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use R_A for n 60,10 min /*Resource A*/- U! A) s" Y( _: |" K  U/ `7 u

9 Q5 N1 g$ I7 k. ~$ qsend to P_B. c6 @9 P9 w$ q8 n# {% l
end
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* [% y5 Z/ ^' y7 D' W$ `$ PP_B and P_C is similar8 ^- c/ j0 E  \3 {9 S% K6 I4 w
triangular 30,60,90 min' W% ]; n8 Q. u: A
u 60,30 min' ~" X+ h5 F+ Y7 k0 U8 @
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in 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.2 i( x+ V4 H4 n2 X, `
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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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