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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,! v+ F/ U0 _5 B  a
  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.
* I, F# b; }/ s& i1 q+ m+ c1 n  Loads are processed by each operator for the following time:
& _6 H, H  }5 E  H' P3 J" N  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.
* C. ?  V; @  z: I, O; S3 H4 W/ R  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.% o! ?3 ?6 u. [9 k4 }/ v
  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.
0 A4 h( f3 s9 Q" WSend 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.. s! R) {! i. O( |7 M( t* [

' D( {/ E% z1 H2 c/ }3 b问题:
+ b/ k) m# Z$ [4 C$ \- @After running the model for 10,000 days, what was the average number of loads in each process?0 a4 o' }* |+ q1 \' M* o. V

  n  b; w1 g0 C3 o2 _  U不胜感激!
发表于 2009-10-6 22:36:13 | 显示全部楼层
begin P_A arriving
  X: N" i5 o/ A  M: m+ Qmove into Q_wait /*Capacity is infinte*/
& H! G! h4 E" P, {4 Vmove into Q_process /*Single capacity*/: Q4 j! ]4 a" g# c

" K7 K' m- x- b) p, }; `use R_A for n 60,10 min /*Resource A*/
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7 b$ T! Y5 I- X) jsend to P_B
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P_B and P_C is similar4 I' k& e6 i% ?! L
triangular 30,60,90 min
+ l2 q# c# D/ d2 Q# Pu 60,30 min7 h3 e2 B2 [4 _% q2 }+ H
+ a. B" \! ~* p( [! B/ \
. w! t" i/ k4 Q. G5 e
in P_C, you need to send to die.( d. T; w9 ?: M: d/ g8 A
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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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0 U* I  c& m# n5 v9 }" v2 \6 B# y% C0 h& J3 R8 U9 K  U
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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