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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,4 X1 s( W/ N% Q1 \2 E% I
  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.9 r, Q! h/ R! Q
  Loads are processed by each operator for the following time:% p+ o, [/ X0 B, A3 X0 V
  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins./ `: a2 n) B: X, k4 X0 b$ R/ U
  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.
; l( V8 G/ d- d0 |6 h  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.
) e, r9 e3 H: Y! z3 V" R( `( CSend 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.$ v( E  O& u' {4 @3 Y, B

2 C7 v  p# P" ~% l; {6 C$ t问题:; ~- F& W% ]6 K4 t" _
After running the model for 10,000 days, what was the average number of loads in each process?, _* Y. w5 ]" f% ^- G& f: f3 ^1 k
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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
+ R% L$ z, j8 g; Z& @& b$ v( Z( t( rmove into Q_wait /*Capacity is infinte*/
  r4 g- J9 u% Z  e' I/ s0 Smove into Q_process /*Single capacity*/
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use R_A for n 60,10 min /*Resource A*/1 Y8 K! J" I! i$ ?

/ A9 r1 Y$ \  ^6 d" Zsend to P_B6 H! U$ i6 _% g9 v
end
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P_B and P_C is similar' p: N6 c8 C  F. C7 S# a: Q+ L" T( r
triangular 30,60,90 min5 \( j0 R$ V3 U2 h* b7 i% e
u 60,30 min
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in P_C, you need to send to die.
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) X, K; d2 ~4 ]  j$ GThen You need to add a L_Control to drive up the whole simulation. and a Run Control of 10000 days.: X; A2 S* I3 e5 }6 c7 H" f- n

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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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