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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,9 x0 q* P( e- q
  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.* C/ m$ n( T  |/ y8 \. `" o
  Loads are processed by each operator for the following time:% t- L' o: v( k! C" x. i7 x+ q
  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.
7 `& i4 r$ D% M; C  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.# e- o: n) g& Y: C, [6 ]( l% T8 C- ?3 v
  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.
0 C$ j: u4 Q% c; y: R% SSend 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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问题:- l2 H* l) f  a% P/ d
After running the model for 10,000 days, what was the average number of loads in each process?
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' c* m: x( G! L5 l* r不胜感激!
发表于 2009-10-6 22:36:13 | 显示全部楼层
begin P_A arriving; N% ~) o- E" `* |6 p& e
move into Q_wait /*Capacity is infinte*/
, C5 z; G3 G. }+ Y# R. \$ ?move into Q_process /*Single capacity*/' `$ J, Q) ~8 N2 o; ]+ _
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use R_A for n 60,10 min /*Resource A*/9 K4 s/ u! z/ A3 @

+ o9 H, W& ~5 }9 G5 A: Esend to P_B
' v, |& a6 z% I: W/ h. |end% U" K' e7 ?1 z+ u" H: p  `" S. G

# p) m6 C  i1 S- ~P_B and P_C is similar
: s6 I+ y! _- ~triangular 30,60,90 min- p# C% U  {. ^' l1 e4 r1 R
u 60,30 min% f6 o! E. s  E# @* i8 w8 F0 j

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in P_C, you need to send to die.( C1 k& ~; n# W  |. a, Q

/ j% Q( ^; t6 m4 B" |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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