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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,8 I* _! R4 R: x; m- P
  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.
. z- k% t, Y2 Q  Loads are processed by each operator for the following time:1 c! Y' B* f/ p8 s
  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.
* @$ P/ O7 r' E8 |$ Z, ]" ~  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.& H( {$ y! O* z+ q  i5 E# W# w; k
  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.
3 t, v, |0 }9 t' X0 D5 ]! OSend 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.1 h6 \* o! G1 Q( q
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问题:
) |6 d3 v  u) SAfter running the model for 10,000 days, what was the average number of loads in each process?: g! z( x0 d  o- P  i! w- W0 Z
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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/ D. F6 d$ F$ i0 ]( f
move into Q_wait /*Capacity is infinte*/. I+ y; A: @' C5 Z2 H
move into Q_process /*Single capacity*/( a9 \: K4 q; i: Q

- r2 ^- Y9 [4 ?6 t0 Duse R_A for n 60,10 min /*Resource A*/8 Q# {4 C9 z: ~0 i/ j: |

" f  ~& `  a1 L0 ~( `7 ~send to P_B6 e/ p. q9 ?5 z. A& ?
end: c: l5 a: o+ j6 F; j3 e: ^

3 u" x  ^: Q0 ~4 F* a* UP_B and P_C is similar
% I/ o# N$ @+ otriangular 30,60,90 min
2 R& F5 S7 c% fu 60,30 min" v3 ~% Q4 @, U, h( h# {
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% }# Z5 M7 C" Ein P_C, you need to send to die.3 U* H( P/ V2 L0 N! j* q
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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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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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