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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,) ~% l9 u( C1 G+ E) P
  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.0 j! ~" `7 S1 h# D" s9 y
  Loads are processed by each operator for the following time:
! c, D0 N; m2 L  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.
6 G  M1 d5 w5 O( t: a1 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.0 T1 U1 a; h- M* D* K
  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.
- R: V" n9 V# o3 m# iSend 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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4 c: a4 [6 }' Z3 _问题:
! D: n# x" Z; u7 y  BAfter 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 arriving* w  C' `6 M# D, D
move into Q_wait /*Capacity is infinte*/
) f& Y+ |) m) {9 p1 w2 R' Mmove into Q_process /*Single capacity*/
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use R_A for n 60,10 min /*Resource A*/
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6 A/ P0 B' A2 S; p# X3 d' Vsend to P_B6 q3 a; T" Z) D5 Y; p
end
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3 Y! t4 ?, ~  Y; F, r0 I3 cP_B and P_C is similar; L9 P' u8 {! z& j( E+ Q2 P  f
triangular 30,60,90 min
% n6 `4 v2 P, M2 Z' i0 e1 O' X4 Xu 60,30 min. \8 F% n- [( l9 X9 r: M1 U3 O

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- E' A/ T" ]  T+ t1 J" lin P_C, you need to send to die./ s8 E0 }! e% x7 C, {6 g; e
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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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