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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,9 M" A; C1 O' h
  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./ P5 d( t0 O% E- B5 @) L
  Loads are processed by each operator for the following time:1 c4 I/ \/ O! Y  C3 q8 w1 C
  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.5 i  }6 H" H+ \8 [. D
  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.
7 n- g: u* V$ z( v, B7 z  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.
) h: b& _  |) t* H5 i2 Z  Q4 \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:8 O( [6 I) S: ^
After running the model for 10,000 days, what was the average number of loads in each process?( o" {& I, \5 c5 u
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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* l/ V$ ?7 K% E3 {
move into Q_wait /*Capacity is infinte*/- q4 B9 E- ^/ l" D
move into Q_process /*Single capacity*/
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* U) j; U6 `2 J: N) X2 |+ _use R_A for n 60,10 min /*Resource A*/* A, u, S4 R! _* {. w5 w

3 L8 Q/ x7 e# jsend to P_B8 ~$ A) Q+ D( P( |
end
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P_B and P_C is similar; b4 |% d, t4 ^# W4 |* T# V# [5 Z+ w
triangular 30,60,90 min2 c* G' ^9 C: f" r, P( \  k* w
u 60,30 min" J- e! A/ |* C: w' x- U
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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.
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: P/ ]. h  g2 Z# ^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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