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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,; r; g- d. T" Q0 q) Z
  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.! G9 W; c* H6 z; C
  Loads are processed by each operator for the following time:2 y" a( W: W% i- r6 A; V
  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.
$ }# k" i! K) p- 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.
1 {& k+ X5 F5 g  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.
! j3 T8 o, y7 gSend 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.2 C7 d; o$ g8 Q, t  a

+ }4 q6 \4 K2 d: }' Y) C& y- J问题:
5 g- @$ G( K5 _, I1 vAfter running the model for 10,000 days, what was the average number of loads in each process?, s& {" t0 v+ y. n6 i7 y. }- D

& q9 Q# K. S( Q( ~* r6 Q5 {/ j不胜感激!
发表于 2009-10-6 22:36:13 | 显示全部楼层
begin P_A arriving
. j# x2 z6 \0 l/ lmove into Q_wait /*Capacity is infinte*/
1 y) a9 e7 r3 i& K2 ]move into Q_process /*Single capacity*/
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: S! ]2 [( v) @. n; xuse R_A for n 60,10 min /*Resource A*/* W0 P0 f! p* B4 G: W7 I0 }

4 O: ?* z3 {5 Z' n  y4 U4 }# M* Bsend to P_B
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P_B and P_C is similar0 n4 A& H# ~1 E; H! I# s* I! Q9 W
triangular 30,60,90 min# `* e4 C9 W( Y* J+ b7 r
u 60,30 min. p, |  u* a7 y1 `1 M3 X5 w$ f

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in P_C, you need to send to die.
/ f3 \- H7 Q5 N- K+ ]& Q
9 ?( _  @5 w" A4 @0 u; bThen You need to add a L_Control to drive up the whole simulation. and a Run Control of 10000 days.
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4 x8 w7 S6 A, ?; b1 Q. e0 X5 }- 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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