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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," I: w; E9 R, J, Y
  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.5 ~1 p+ X$ D+ Y: P5 h8 T
  Loads are processed by each operator for the following time:2 ^, R3 u* c1 E  \- H, ?
  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.8 V8 v8 {" g, g! T* w* D. ^6 X
  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.) b# C# D- N: P
  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.
6 `6 I$ l9 j: X% j2 g/ b" fSend 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:
) W$ Y$ @7 E2 [5 HAfter running the model for 10,000 days, what was the average number of loads in each process?6 U+ F9 s3 E) b0 Q9 r* M' X

" y+ W2 i! d& D2 L不胜感激!
发表于 2009-10-6 22:36:13 | 显示全部楼层
begin P_A arriving
5 G& A( J( s* p5 p$ u/ ]9 @4 Qmove into Q_wait /*Capacity is infinte*/8 _% N9 V. o& h( ^
move into Q_process /*Single capacity*/% `  _- _3 ^' Z
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use R_A for n 60,10 min /*Resource A*/+ K0 Z3 x( h/ L+ y

# X* I; e  S) Z8 @' Y8 `send to P_B$ |8 k+ V" Z3 L8 Z; N# J
end
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% W  F- u' w" \; s: V% l0 d+ VP_B and P_C is similar
( G9 K5 }2 L7 xtriangular 30,60,90 min# d. j2 h  ?+ V: V" t  q
u 60,30 min' H( Q9 M- N' R0 }) T  X' W

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1 o& Z- T/ I% Iin P_C, you need to send to die.# _% g1 @& r0 L2 l- @
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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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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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