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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,
5 x* l) ^* P" G  Q2 |+ }5 o2 W  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: D8 H8 g( _+ }1 U5 o' h( x  Loads are processed by each operator for the following time:; a+ z9 I: p2 u; r( C+ C
  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.$ ^: @9 w* j, {# `, o3 \; P
  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 z& G, d! C  n5 T! N  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.
. d0 W( E& O  ^3 C3 NSend 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.; k& u  Q) t0 x1 J/ [+ \; U$ g
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问题:$ W. n: w4 x3 \% a9 K
After running the model for 10,000 days, what was the average number of loads in each process?4 D* [5 p0 U/ I- E. }2 l! ~

! H6 t) h8 B: r; A* q* Z不胜感激!
发表于 2009-10-6 22:36:13 | 显示全部楼层
begin P_A arriving9 G% J; ?5 u. b) `+ i" P
move into Q_wait /*Capacity is infinte*/
' e; o8 N7 {2 Q3 umove into Q_process /*Single capacity*/7 ~+ l. t' q, L0 g
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use R_A for n 60,10 min /*Resource A*/1 r& W& H6 Z( W% A6 U
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send to P_B4 S* r/ B2 }$ g* _* Q/ C
end4 O1 S7 i- I4 c: g* X) ?

, H/ V( e  |- J/ W- S1 z) ]9 e  h' K; `P_B and P_C is similar' ^6 M8 ^5 v, E# m+ y1 e$ G
triangular 30,60,90 min
+ b5 i6 _$ F5 ]. fu 60,30 min6 }: B( C' U/ m4 c- Y! K; p
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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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7 ~1 w5 Q- ~  A* o/ |* c) M/ ]
6 s6 |% F! J7 ~8 k5 p! X1 ~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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