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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,
- z1 p: t- |& V  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.0 O+ q8 o7 \9 T' o$ I5 }; d
  Loads are processed by each operator for the following time:" a- }2 X  y# a1 K
  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.4 ], m* j4 j& f! o: @2 N6 b" j
  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.
# t4 i. T5 V6 w" _* W( l  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.
* B. W, Z# u2 h# ]# z$ oSend 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.8 ~4 l$ X* l0 m& K8 A

+ O5 _. ?8 Y7 D5 P8 r4 P问题:
2 g. L) u! Y4 a+ q+ xAfter running the model for 10,000 days, what was the average number of loads in each process?3 x5 E$ F5 a  M* x( @
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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! G; o4 }, C0 e4 D. {6 j
move into Q_wait /*Capacity is infinte*/; @9 `, ?' B! `7 a2 f  d  v% x) h/ [
move into Q_process /*Single capacity*/, O( \! ?% ^" s- {
! ]$ b) H7 N- R
use R_A for n 60,10 min /*Resource A*/. T) d6 W( I- [5 O" \

0 s/ s! C4 y1 ~, S; F) Jsend to P_B
$ D- u+ X7 h7 X% ~2 G. o2 nend" d' s/ d1 Q' s3 A8 A4 m) Y
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P_B and P_C is similar
* J" ]% k1 t) h/ i8 a: L7 I! rtriangular 30,60,90 min3 j3 y9 t+ |" X4 W
u 60,30 min
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4 x. B9 Q# h( W; f/ I+ ?0 ^in P_C, you need to send to die.  l- Y2 G( P$ ~: \/ D7 C4 y+ N1 ?

' ~$ i8 n/ `# Q# a" p/ yThen You need to add a L_Control to drive up the whole simulation. and a Run Control of 10000 days.
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$ H+ d2 E9 q) ~" ~
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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