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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,8 W" B+ V; L3 a. R4 T
  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./ W' _+ o+ F9 k' `' {2 `! K
  Loads are processed by each operator for the following time:
; c" l/ B6 t) E" H' D7 `  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.
  R/ a  S  c4 U5 Z  |, G. x% M& t  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 D' z/ r( i: b( {
  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.+ E+ H$ t2 _/ j& e" @2 T
Send 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./ i% g* P/ ]  }% U

. l5 O4 _% [* I  \% d1 Z9 P* r问题:
5 m4 a- Z' e& w1 E& @0 SAfter running the model for 10,000 days, what was the average number of loads in each process?- K6 d- f8 }+ v3 S" s

- h) q4 U7 p) C4 p! t不胜感激!
发表于 2009-10-6 22:36:13 | 显示全部楼层
begin P_A arriving+ [2 z6 N; k2 T; ~+ k2 L3 ^
move into Q_wait /*Capacity is infinte*/) t! C1 V7 k' h, h! L
move into Q_process /*Single capacity*/
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, h2 ]  y* y0 v2 j; w) muse R_A for n 60,10 min /*Resource A*/2 f3 {& W1 h+ `! ?$ D/ Y4 c
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send to P_B
3 b- `( V( z- V% X( Jend
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P_B and P_C is similar0 @4 h9 Z) N6 Z
triangular 30,60,90 min
- {' A+ I6 U* hu 60,30 min
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in P_C, you need to send to die.
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- e( |7 ?/ _' |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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7 s% z, c" \* X, o1 KRemember 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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