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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," J5 x" Z8 Z- k0 O4 o) U& ^
  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.& m. e6 o# q2 }- z$ s
  Loads are processed by each operator for the following time:
* ~" g, f8 W. v, D4 ^$ u  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.
; X+ r% \' H+ o1 c2 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.
0 Z$ B3 v2 Q: `& U8 N1 i8 ~8 g  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.
  h5 e8 ?# o9 G# h0 r8 _( 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.# w: n# H0 a6 W7 ]# x' [

3 _1 k& T3 t1 t- h+ D问题:2 O1 n( S) D- }
After running the model for 10,000 days, what was the average number of loads in each process?4 e+ I5 T3 @, q5 a& _- d# x

, X6 w9 P; X- }' i  A6 s不胜感激!
发表于 2009-10-6 22:36:13 | 显示全部楼层
begin P_A arriving
5 j1 `4 y7 h9 N5 F: @4 mmove into Q_wait /*Capacity is infinte*/* c' Z. M$ z, S0 ]. g9 W: \# @& U
move into Q_process /*Single capacity*/
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use R_A for n 60,10 min /*Resource A*/
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! P1 a3 X2 c1 H2 S9 A) C; \1 Q% K4 Tsend to P_B  d; R7 x0 G1 v- @! g
end
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( B( N" U3 W! w; I8 w; ~P_B and P_C is similar
6 h6 F% v3 B, t7 c  j" A5 Htriangular 30,60,90 min# X. b# T6 c" y$ P" K6 d) C
u 60,30 min
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in P_C, you need to send to die.! J$ f* |3 _# O6 y7 z

* ?% I5 b6 x0 YThen You need to add a L_Control to drive up the whole simulation. and a Run Control of 10000 days.
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) V0 d  l% {1 ?/ q" mRemember 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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