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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," B, ?0 w" T. W
  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.6 b$ Y$ O7 K9 r
  Loads are processed by each operator for the following time:
+ F) R, `3 w0 ]  i% w* h1 g8 W/ a% m  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.1 k( U- t; W$ B, u. O% {
  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.
# X, P0 u5 x. ]$ m) E. e; Q  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.
+ G" U5 Z, t, W9 QSend 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:. t1 R! b8 g' o6 g7 E
After running the model for 10,000 days, what was the average number of loads in each process?+ i3 x- V: Q/ L" b. r( Y( A
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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! C+ C8 m' v% W$ h% Z: t) `
move into Q_wait /*Capacity is infinte*/" N) M0 M( _$ r7 x
move into Q_process /*Single capacity*/
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use R_A for n 60,10 min /*Resource A*/7 N6 q- G7 Z$ Y$ N
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send to P_B( S' @; b1 j2 O
end
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P_B and P_C is similar
1 @: m& f4 q; U. }; C. H% wtriangular 30,60,90 min
: Y; a, R% z: Nu 60,30 min, A+ ?. Z# J2 a  }
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in P_C, you need to send to die.1 F* g: U: L$ d: k$ A0 G, O

. K; _8 p. o! n( K0 ~3 bThen You need to add a L_Control to drive up the whole simulation. and a Run Control of 10000 days.
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& k7 C' n! d& x* gRemember 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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