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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,3 E% H2 d# s3 ^1 s' e+ t/ Q4 ~3 S
  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.: V' T& U( Z6 `. E7 f) u+ A
  Loads are processed by each operator for the following time:
5 q/ F2 v) H8 J  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.% J1 X$ {9 S" l6 _6 w$ P. `
  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.1 P8 u1 S! @: {  y. V& `4 L
  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.- h! [9 t3 V6 U/ y, t1 w
Send 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.4 [: P; F, X. n7 X5 e

5 ?; H+ R# \: T, ]) y问题:. {1 H# b5 N6 A4 z: n. q& a; i( F1 k
After running the model for 10,000 days, what was the average number of loads in each process?
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! u) V6 R2 r. N5 e不胜感激!
发表于 2009-10-6 22:36:13 | 显示全部楼层
begin P_A arriving% m) Q( k4 p7 h) U! j; }! Y
move into Q_wait /*Capacity is infinte*/
: J( G* w5 \0 G& rmove into Q_process /*Single capacity*/. W" V+ E$ a& J2 @$ J" q. ]4 G& U7 ^

+ i3 W! e9 B* O) H; ]4 _use R_A for n 60,10 min /*Resource A*/# }. j" [& d3 X2 R1 F3 v

/ \: e; N, i: x: [/ S" msend to P_B. m* u6 f; r  i9 f! S
end
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  _8 [- J3 h) n$ NP_B and P_C is similar: i5 Q  k( L" g  [. h
triangular 30,60,90 min
0 W' c5 u5 t% D; a) {. c& K: bu 60,30 min
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$ t: a5 }) j8 J3 g; sin P_C, you need to send to die.
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5 {$ ], x8 S( V; _Then You need to add a L_Control to drive up the whole simulation. and a Run Control of 10000 days.0 m- u1 A9 d% q# {% 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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