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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,
: B8 z% G5 L" R6 t8 j3 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.# F9 ~" ?% U$ s9 |  x; C
  Loads are processed by each operator for the following time:7 c" l+ |0 Q9 _! K; |8 E- I8 a6 J
  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.
2 f8 i- X2 y/ ]) o" ?0 x5 \" _2 M9 V  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.
# I# C' f5 @# z) F1 R  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.
7 y4 T3 `$ \& G" b5 ~: U" nSend 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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6 \1 o# P, k7 z% T: H5 J问题:
" \  T" q/ H9 d8 T( _After running the model for 10,000 days, what was the average number of loads in each process?
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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' ]7 T8 a3 X( p( Y
move into Q_wait /*Capacity is infinte*/
, D9 Z" H5 V9 l- l9 x$ ~4 k. x" C  _5 @move into Q_process /*Single capacity*/9 M1 T5 o1 n: [. x8 M

, `5 L5 I  ]8 I0 }0 juse R_A for n 60,10 min /*Resource A*/1 R+ U9 N. E9 `

) [) M* D0 z/ h  x. L1 Bsend to P_B: y+ o( V7 C. d9 Q% ?
end) ?# R% w" X9 p/ J$ g7 S' O2 m
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P_B and P_C is similar
: g1 i& e# r# P) h/ ^triangular 30,60,90 min
/ {- i# B7 p# S$ s) hu 60,30 min) [- Y# ~. `, X% P
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in P_C, you need to send to die.4 \! ]! d& b  y8 I9 ~
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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.4 a* l; X& G' \
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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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