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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,0 x" o+ a) c, w5 |& K2 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.
2 \8 b  L7 P: w; P( |7 A  Loads are processed by each operator for the following time:
: _( F& b& m+ J  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.
- }* w: z) n6 N0 G  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.- M) d0 r% f' l8 k/ k' v% s# a! ?- v! k9 q
  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.
5 I" _* u" a4 x% ISend 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.& h5 H$ I2 _+ V; |9 u! T
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问题:# I% ~% K: z. g) `
After running the model for 10,000 days, what was the average number of loads in each process?
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发表于 2009-10-6 22:36:13 | 显示全部楼层
begin P_A arriving
0 H% q" H- x# \. d# {move into Q_wait /*Capacity is infinte*/
( Z! S" o" T; c5 [move into Q_process /*Single capacity*/- J. _3 V$ z& v; k9 U
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use R_A for n 60,10 min /*Resource A*/3 n2 o$ l# Y% s+ z

; V5 _/ v) |" V4 Isend to P_B
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P_B and P_C is similar
. ~" L# f/ n  Etriangular 30,60,90 min2 Z. i0 q) Q+ {) G- e$ |2 U
u 60,30 min7 P# Z+ k* Y# d0 T' D1 {% z
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in P_C, you need to send to die.( Y+ p& w  S! y5 z6 t0 `

' s( t$ R# t/ A! N; k- e5 @* aThen You need to add a L_Control to drive up the whole simulation. and a Run Control of 10000 days.' L6 T. \# i6 V* Z% m
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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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