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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,6 W% {  l$ ^5 }/ H, N/ L
  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./ O6 q. v& q3 g, s
  Loads are processed by each operator for the following time:
: O, K) l% x3 t8 N' \  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.; L! }# Y& {4 u  a' @
  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.
" o% p: d# M/ @& N. h1 f* h  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.
0 `  K& [' x! a$ Q$ rSend 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." J3 w! v; d4 f) n: U4 `

, `& t4 |1 E2 b8 i9 _; H问题:
( K8 E+ l# c4 [' E$ gAfter 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 arriving3 P, x1 ~$ s+ L- C, m& g
move into Q_wait /*Capacity is infinte*/. j7 n9 j# L( z/ M
move into Q_process /*Single capacity*/, T- ~8 T) I' N. w2 e
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use R_A for n 60,10 min /*Resource A*/% M  N4 ?* x# T0 Q5 p8 p; R# y% O

6 L: G  {7 i- a6 z! w  q2 }send to P_B* {5 Q( G# _& r' W, X, u
end; H" m. Y% \+ {4 _- r1 ]

- t, A( X8 `# J  g  y: kP_B and P_C is similar. e- {1 B5 f; _7 q. N( h0 o: G* h$ q
triangular 30,60,90 min
  V' [7 Q" J- I$ C6 yu 60,30 min
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in P_C, you need to send to die.1 n% G$ g+ T+ y1 g
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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.: K$ u6 ?8 R  I1 _! A7 x, d

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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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