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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,
  c: C. x) M& ^8 T7 H. f  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./ p  j. q6 Y9 A0 e1 o0 `
  Loads are processed by each operator for the following time:& R$ C# y, _  q; Z- R+ D' p% P
  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.2 z5 v2 D  h2 o4 E9 R1 U; h
  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.; |2 p% n* P0 q+ h/ ]; m
  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.+ o& W! G' H* Q5 b
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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# u# P+ q, h  x  B问题:$ f( a/ k' o: h5 M
After running the model for 10,000 days, what was the average number of loads in each process?
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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 arriving3 D' u/ E7 s/ @* n
move into Q_wait /*Capacity is infinte*/: D6 H5 F1 R# N+ I8 p: A) f6 I
move into Q_process /*Single capacity*/
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use R_A for n 60,10 min /*Resource A*// e6 X6 I0 J0 M8 B' ^' I" Q6 h0 ?, D
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send to P_B$ s, n0 i) l. d! n  R, O6 E4 o* ]
end
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/ E+ S3 U0 K. y3 p' h% \P_B and P_C is similar( F; q" n, r4 M) I+ @% v5 c5 W
triangular 30,60,90 min
$ M0 I) Y5 i9 l! p2 X( |6 r2 O, qu 60,30 min2 [3 h; a7 s5 R; Y7 h

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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.1 }1 i, G' I6 T3 w
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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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