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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,1 H6 R9 U  L# _  A4 a  g  I" 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.
1 I) K& w* m6 ^; n; K8 @- x  Loads are processed by each operator for the following time:% W) _% H5 G6 _1 ~
  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.* Q# E2 n$ @& |/ {' 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.
. }& D! C. M0 t- z; d8 _1 i% }  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.
$ h* D6 i9 v6 l. [% MSend 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 z4 G1 `3 L: y; s

6 [5 p: K/ [7 ^+ z9 E% t问题:
0 p0 m, m# @+ a+ g- ~$ AAfter running the model for 10,000 days, what was the average number of loads in each process?
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) F$ u1 h% n4 o$ @* X* x不胜感激!
发表于 2009-10-6 22:36:13 | 显示全部楼层
begin P_A arriving" g; Y- L3 i- ^; n" e0 ]7 W  l
move into Q_wait /*Capacity is infinte*/
2 j+ f8 \/ i3 ?move into Q_process /*Single capacity*/
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' K' {2 |8 Q- e9 S( |& U- suse R_A for n 60,10 min /*Resource A*/1 Z) N- `9 P& ^2 Q- q$ Z* u% }
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send to P_B' o( B$ b9 b5 A" s& H
end, w. ?# u% F- o$ [5 Z7 T

' [6 v, ]" t) ]: {. c* _P_B and P_C is similar
' {- v, n6 g+ K7 D; J$ Y& Itriangular 30,60,90 min
# f1 X" K3 E: h5 nu 60,30 min  E: ^/ ?0 I1 ~6 r. h& [- L

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2 x) X& i( d+ @( [( W- din 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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2 B7 I7 b" z. ?  Z" T0 {$ t' t9 n+ }) }# m
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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