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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,1 t1 O7 z5 v4 o8 v& ^$ M
  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; h9 R; m* v+ T5 I2 ]  D9 N9 E  Loads are processed by each operator for the following time:
: ^4 |" R$ ?# j7 Y  b5 E  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.
) Z1 ^& ^0 P& ^, b5 K  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.
0 P$ J! w  C" y1 y6 X1 q  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.
/ {( E; _  k& C+ @; O3 j7 m! pSend 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.6 T, d1 D+ s' X
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问题:% W) G9 A  }5 I  }& e. u
After running the model for 10,000 days, what was the average number of loads in each process?' ^4 m! G5 x. {7 C+ E4 a- k7 l
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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
" C* b5 x  [2 f# X/ z9 ]move into Q_wait /*Capacity is infinte*/
4 m" @  B2 S% j. V8 q' vmove into Q_process /*Single capacity*/
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& j4 m: L$ B: B$ w$ juse R_A for n 60,10 min /*Resource A*/; I# B$ n4 u6 f4 O; W' w

5 p  M0 j5 G/ _5 G% e0 P2 F3 Fsend to P_B
; C' h+ m! c* l2 send" b8 B5 @( x" X* N+ D

- `# ~' @9 Z4 LP_B and P_C is similar
7 i. w0 b# h3 Otriangular 30,60,90 min! B) e5 ]9 j% R3 }. J; ~/ u& g0 w
u 60,30 min
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in P_C, you need to send to die.* v0 H3 G& O/ g6 z1 T# b& ]
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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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2 F, i; K3 n' O, r; r* S& ?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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