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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,
7 E( O5 b4 a  |% b  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.
* ?2 k1 I% {0 k7 e" y, x  Loads are processed by each operator for the following time:
. q4 m4 }5 R  l: X; a! T  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.
- s" G7 \6 U* w8 e) d  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.+ z' N% e8 _1 B7 j7 y/ b' U6 J
  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.8 X5 }) H9 M) }0 y' p. b* G0 A
Send 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.3 S# N; t' x* k6 f& B9 J5 t
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问题:
- M8 b, S8 U! MAfter running the model for 10,000 days, what was the average number of loads in each process?
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2 v+ ?* k6 }1 S# A/ `不胜感激!
发表于 2009-10-6 22:36:13 | 显示全部楼层
begin P_A arriving
" w0 K1 M, n( O2 p# _% n3 ]! w3 }move into Q_wait /*Capacity is infinte*/! _/ B) y) G7 R$ v9 `' ]) h
move into Q_process /*Single capacity*/; O7 c* U" C6 m$ z1 |% g& T5 _
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use R_A for n 60,10 min /*Resource A*/
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% n) ~* t9 C4 S: |/ Tsend to P_B
; K! p1 s3 P# I! m) z7 T  dend4 D( U( L: m/ i0 U/ l" i5 {5 [3 V

& c1 L2 h/ }5 S' p7 yP_B and P_C is similar
5 T3 \/ b- r8 G7 m, g0 D! |3 Y9 ]triangular 30,60,90 min
9 V& g+ O3 s4 iu 60,30 min* ?- b8 f7 P$ e* F

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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.# m0 L' t6 n3 S! {8 Q) z
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$ w! O% M/ [: O0 W+ `5 c" y
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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