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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,& m; A; e4 d5 L; T& H, E
  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 y! q/ h% U9 [) K9 u; |
  Loads are processed by each operator for the following time:
, _. L* b0 I$ X* n' W& K, O9 g/ F0 }  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.
; K0 f2 _2 k  q/ K  ~- w1 R1 l  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.
6 d, Z9 E: B) F+ m/ Q  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.
& ~$ K4 @" {8 o- n$ y6 I( rSend 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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* d  q9 v4 R) A/ v问题:
; `- Y2 _2 J/ [4 KAfter running the model for 10,000 days, what was the average number of loads in each process?
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2 B- U6 ?9 B0 G. J不胜感激!
发表于 2009-10-6 22:36:13 | 显示全部楼层
begin P_A arriving% o8 [6 ~$ y: M! b) j5 y
move into Q_wait /*Capacity is infinte*/4 {# y  }2 u: Q+ G; ]
move into Q_process /*Single capacity*/! e" S! `1 `# k* G% H  O! Y# h

# E+ J6 Y# S& Luse R_A for n 60,10 min /*Resource A*/
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% a6 {+ r& l. Q' t5 D5 Nsend to P_B
9 w" v5 d# n; U, v5 T" Xend
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$ R# [( o9 u: T& F: G: b4 CP_B and P_C is similar1 [: N% E  b7 [
triangular 30,60,90 min& s9 ~( E9 W; P
u 60,30 min! z: q3 s# M; M2 [) N

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in P_C, you need to send to die.
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; g/ j" {9 R7 I5 @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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