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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 g3 ^, D. ^8 Q' h5 O
  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.
1 q3 p  N1 {+ f, C! Q2 ~8 w/ u  Loads are processed by each operator for the following time:
3 U6 j; a# L$ Q. N9 O9 T3 P6 O  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.
3 t$ _1 D$ J1 p6 c$ B, l  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.) K% r0 E) E) Z6 e+ _" b* U, y
  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.
0 ^: T0 D  R! t6 \. `- {: B' Y7 ~9 kSend 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 o  _( c: E9 |8 {

  k* x4 s4 [' l$ \问题:
. [  h, m, m. N5 b5 c' `$ I% aAfter running the model for 10,000 days, what was the average number of loads in each process?2 ~$ p7 C2 x1 ?) E+ s& A( Z
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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
1 u8 H/ ?( X: j) h1 {( @' }% r3 L9 Imove into Q_wait /*Capacity is infinte*/+ |% I% h( @3 E  Q! _
move into Q_process /*Single capacity*/+ m8 a1 p# a2 |6 u6 k+ u# k
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use R_A for n 60,10 min /*Resource A*/9 z, j( G" \, E9 l8 g0 p0 a

3 B9 Y, _; Z" Q1 E: b* j0 D" t. n3 ~send to P_B- h5 @, g3 C- q; ~7 n
end  H, k2 d. Z% i3 K5 b2 `& ^3 ~
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P_B and P_C is similar
: L0 H% G3 G. {' g7 B" {triangular 30,60,90 min
% l2 v7 }* ]" w$ D- N! G* X, Au 60,30 min( m: y7 g0 P1 R7 b1 u
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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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