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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,
% S, m1 N* _7 @  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.
+ l& h" O2 `. f7 q5 L* V  Loads are processed by each operator for the following time:# @4 C( R7 t& Z6 Y' b6 E1 m
  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.% R& o. P# b% L' }/ D; Q
  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.5 u8 h$ O& K* U' Z# j( u# j9 p
  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.
9 U0 {' U% t+ i  [% e' K5 mSend 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.$ K3 I( N* h7 }5 s' P( e# m
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问题:1 b1 c1 D- h7 o* d' S9 j
After running the model for 10,000 days, what was the average number of loads in each process?8 j, x% D" Y) t+ q- w- l2 A
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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! f* a9 g  O" I: X0 |5 ^
move into Q_wait /*Capacity is infinte*/
- E7 ^9 Z! D0 U2 Z( O, zmove into Q_process /*Single capacity*/
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use R_A for n 60,10 min /*Resource A*/! V2 ?; w* q, T. _
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send to P_B; L" y3 g2 G& C9 Q5 c
end
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P_B and P_C is similar
8 X) s+ P) f, j  j3 W1 Ftriangular 30,60,90 min7 j2 y! ]3 \$ B  k( K) g% U# V0 Q* x
u 60,30 min
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: u0 L2 N/ [/ T9 S7 Sin P_C, you need to send to die.
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  H. W7 Z: @% O! y6 ~; p( ~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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