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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,# r. I3 A! t2 S( f3 c( ~
  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/ J) r6 l$ ?) l! O  Loads are processed by each operator for the following time:5 J3 ?2 T* w) K# \- i: u: L7 e. p
  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.
. X4 h0 L6 K: Q' W9 L' j  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.
/ g' r+ {) V/ v* c5 E  u; x  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.' G$ G$ Q9 i( F, o$ {. S
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.9 ~  x, m! B  |. ]$ L6 N

5 B! N( q, y: v问题:
, y6 `" I2 o' I" |- lAfter 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
( N; [4 h& }- m  E( }9 b2 I4 I7 H  Wmove into Q_wait /*Capacity is infinte*/
  L6 {7 R7 W' }8 U) w* L6 r- t( k3 s: ymove into Q_process /*Single capacity*/
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use R_A for n 60,10 min /*Resource A*/& A5 g( F/ b& X, l- U6 |5 @. I6 V
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send to P_B
8 w4 p' \& g0 S6 w7 j, F4 @end: D& W# ?) T2 T" ], @
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P_B and P_C is similar3 \$ X7 l- H) p# f$ i* ^) V
triangular 30,60,90 min
* X6 `6 b8 t" v9 f4 bu 60,30 min$ ]1 q1 I. D# F/ m

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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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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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