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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," n# V0 ]& `- a0 d. I! m
  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.) [' E- O/ Y1 P$ p
  Loads are processed by each operator for the following time:% u( @" X5 n2 I
  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.
8 v6 ^: z" n  C5 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.8 ~' @, ~# }3 ?1 N. P. k3 {" M+ Q
  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.
) b  X6 r5 z4 v: h6 ZSend 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.& l4 t( J$ F. U- L' |' `5 E4 I7 P
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问题:+ v3 o: y3 m0 `1 u3 I; \5 W+ d) z4 F
After running the model for 10,000 days, what was the average number of loads in each process?* S8 O  A  K+ z2 E. j3 s: e; s

( s3 z2 ^9 u- h. i- M) x! a不胜感激!
发表于 2009-10-6 22:36:13 | 显示全部楼层
begin P_A arriving
5 ]0 L" ?/ k5 o7 ]move into Q_wait /*Capacity is infinte*/2 d3 W3 b( ?, @
move into Q_process /*Single capacity*/
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, w* }" N( C7 i) j5 |use R_A for n 60,10 min /*Resource A*/* b2 P1 R+ k, f8 ~
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send to P_B
" k  ~" D" n# p. ]9 }# P. G" y  Yend9 a! V: [9 W/ n* J5 a. ]) [

" E8 o0 ~: R' f7 Y$ J  s# g% YP_B and P_C is similar
1 _& E! h* k# X. G. V: q! ttriangular 30,60,90 min) }1 o+ I( w$ ?! r6 N2 I( J" u
u 60,30 min( E+ Q0 \9 s1 o2 ^# L

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in P_C, you need to send to die.% \" ^9 I4 P" M2 k& A- E$ ]2 d
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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.
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* u. w: k5 J, K9 V. m+ F8 ^5 _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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