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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,0 d: q5 {2 s9 X3 }
  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.8 U7 l# B! w! b
  Loads are processed by each operator for the following time:
) u7 q9 Z1 x+ \% A: p  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.: g1 X: ^/ i7 w8 s' ^
  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.
* S/ a6 h5 X  |; O; L' ~" Q/ H2 g  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.
6 ?: v9 v' V8 ~, u  k1 _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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问题:
; W  g# }1 }; wAfter running the model for 10,000 days, what was the average number of loads in each process?  ]$ J4 o$ y/ p
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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% P+ X4 M$ p! v/ N" W- C; P
move into Q_wait /*Capacity is infinte*/
3 F/ z3 Y% [; pmove into Q_process /*Single capacity*/
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. Y/ I! n/ Q3 q" ause R_A for n 60,10 min /*Resource A*/
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send to P_B  D8 _8 }5 Q+ c5 |) V
end; Y- X1 f+ T/ Y/ w8 ]

% U  {$ \( a, `2 Q( r) b2 E3 AP_B and P_C is similar. w; p0 b! H$ U0 H
triangular 30,60,90 min
8 B( Z$ k) z) b0 I% u  k  M) l& I* ^% Ju 60,30 min- Q1 j) e& O; k- c

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) q6 b; o! t4 _# G- Zin P_C, you need to send to die.0 R9 r3 F8 D9 r& Z

0 e9 `1 z6 v. }# g5 d  qThen You need to add a L_Control to drive up the whole simulation. and a Run Control of 10000 days.4 W$ f; O% r4 |5 h5 x

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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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