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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 f( w3 i3 Q8 `+ v9 L9 h- l' c4 M
  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.
2 v2 P9 j0 e( y0 V: J  Loads are processed by each operator for the following time:/ h5 g) f# h4 H( C5 J
  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.
/ U5 N" I5 y+ O+ ^: J0 n1 F  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.+ {+ X' E0 d9 B* K5 l3 t8 K
  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.+ v0 q7 d$ s9 U
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.4 ~5 X, u" U2 L0 j! t
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问题:& K0 C! G/ P: H( {
After running the model for 10,000 days, what was the average number of loads in each process?
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0 y5 L! U0 B& u, `不胜感激!
发表于 2009-10-6 22:36:13 | 显示全部楼层
begin P_A arriving* z% z: Q2 p; m8 p3 S
move into Q_wait /*Capacity is infinte*/
$ |4 G) K5 Z. p+ emove into Q_process /*Single capacity*/
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8 d0 q: k% @  n/ g# ]- g3 H$ f0 ^use R_A for n 60,10 min /*Resource A*// Q$ o- v" I; H3 n4 q, j0 j1 \
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send to P_B4 U! o! s. p9 s3 A8 f
end0 r' y, A7 h' P" ~

- [# c7 {' u) J& |8 Z# K( e/ nP_B and P_C is similar
  B8 p( Z5 I/ {+ r0 g/ z& ktriangular 30,60,90 min/ P  m: l" N: \' [6 E
u 60,30 min
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& ^) T& H8 f" p/ _3 B3 @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.
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" @# X/ Z5 e0 ?3 K# c+ 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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