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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,- F6 ?5 P; c: X, Q" p$ X
  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.
! F' e  y' ]8 c! d$ m( @8 F4 P  Loads are processed by each operator for the following time:( n9 ]* C7 J& K1 p% O0 X5 v
  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.' T. p2 U0 V1 \& }! @( M1 s3 _
  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.
4 F' e& ]" h: X' q  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.
0 L, F% h9 l9 }1 c# h* 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.  p. Y  S2 k% z
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问题:
4 W4 s6 v- n2 m5 h" b( }. QAfter running the model for 10,000 days, what was the average number of loads in each process?
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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
/ A( f) g  f4 `. N1 z3 P: ]& Vmove into Q_wait /*Capacity is infinte*/* E" f  z! y1 G' |
move into Q_process /*Single capacity*/
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use R_A for n 60,10 min /*Resource A*/) g$ [+ Y: u( M% [% _" o
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send to P_B
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P_B and P_C is similar
* F: h$ K' c( j% Z4 x3 btriangular 30,60,90 min
+ G; J0 k3 x" O+ j  p: p; Gu 60,30 min$ L7 G  S% H4 u  ~$ Y. A' \% R% d' b
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in P_C, you need to send to die.
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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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2 V0 i& W: H2 a; }4 s0 Q1 e+ bRemember 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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