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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,% Z2 t: V. Y. S' \: H6 [
  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., H& O, p. o! k2 I/ R
  Loads are processed by each operator for the following time:: `# ^9 v2 y1 G/ Z( G
  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.
+ j, ~0 }5 m2 `3 k2 r' N. m$ O8 Y  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.! s- @" D9 @3 r2 Q8 H! `, F
  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.
* Y6 j9 E: l3 l3 r- I# c* YSend 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.9 J3 Z' `2 o- y
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问题:( J5 i" H: f# r# P
After running the model for 10,000 days, what was the average number of loads in each process?! ?7 B3 w+ V* U' P

/ }' [2 O- A4 [3 t1 E# A: e7 C不胜感激!
发表于 2009-10-6 22:36:13 | 显示全部楼层
begin P_A arriving5 e* L- z8 _8 M1 _' [
move into Q_wait /*Capacity is infinte*/9 C* N1 H  X- d
move into Q_process /*Single capacity*/
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use R_A for n 60,10 min /*Resource A*/! }% g9 o+ e1 n, s* |, j: U
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send to P_B
' z% l- q( Y% K/ h% Z( Iend
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$ u% s0 r& O: |. e4 Q  W) VP_B and P_C is similar
0 V( Q- a1 ^& y/ O* Ytriangular 30,60,90 min7 Z: x$ U* C" N+ g! M9 o/ z
u 60,30 min
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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.* ~  w3 S' `) r+ T

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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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