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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,4 O: N1 E+ |. U, n) L
  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.4 y& K8 B/ O2 h# U
  Loads are processed by each operator for the following time:' |: ]8 B' i  i" x# V2 ?  s
  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.4 Q7 N4 ~9 [4 W$ `$ _
  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.
- |/ e7 V/ |+ X2 _& P0 f  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.
  m& ~  P3 m% [, {/ z8 I: 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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问题:2 v: s3 A, T" g* t. o+ f
After running the model for 10,000 days, what was the average number of loads in each process?9 q/ |- h5 Y) {, |3 Z1 k" U) U$ F

. D) p4 L/ S: u- ?' t. C+ L; y不胜感激!
发表于 2009-10-6 22:36:13 | 显示全部楼层
begin P_A arriving
7 b* U4 n9 k% f2 Fmove into Q_wait /*Capacity is infinte*/  b9 e$ h  \+ U- s4 d+ u+ P6 n  }
move into Q_process /*Single capacity*/) M2 ~/ D& V+ q, }6 T

* _' l' F/ w; u* @" X8 ?use R_A for n 60,10 min /*Resource A*/
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5 A- D- b; E# [/ h- r) A9 Psend to P_B$ p- K, g4 \' x7 k, X
end
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+ Q9 B) u. h5 V' D$ ^8 tP_B and P_C is similar
# y3 W3 R# D/ Z1 T% N1 K2 \( d. Ytriangular 30,60,90 min
( W6 \/ Z, b5 Q5 F! o; Eu 60,30 min
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1 L' W& e/ D8 t0 _6 n1 x# c: jin 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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5 n6 R! i5 g8 f  |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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