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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,* J' E5 I$ x. L2 p, \; a4 V) j
  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.7 v) P! E) I# |! E- ?. z; k
  Loads are processed by each operator for the following time:
3 H& m4 O9 d! e  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.7 c4 m# [% g* N$ o4 u& A# ~
  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.5 D" H) Q4 y' |+ q0 U8 \
  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.' J4 t; H' Y0 b  _) j& t/ S) R
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.
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问题:9 r1 t9 h/ S! G
After running the model for 10,000 days, what was the average number of loads in each process?
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$ |6 V  `8 f/ c5 K不胜感激!
发表于 2009-10-6 22:36:13 | 显示全部楼层
begin P_A arriving
2 ^: U1 b7 [6 dmove into Q_wait /*Capacity is infinte*/
! h# h2 o0 a! Z3 bmove into Q_process /*Single capacity*/
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; `6 J+ i, E; R5 N. o% @' quse R_A for n 60,10 min /*Resource A*/% z; x# ]; R# Q" k5 X4 W

- |$ {3 S3 |, o+ |send to P_B! h" _/ t6 c8 Q; Q! J0 s3 G5 j  h/ K! r% c
end
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P_B and P_C is similar
9 P3 g* m& [5 T* e7 Mtriangular 30,60,90 min+ M3 k% J0 C6 |* \
u 60,30 min7 _. B! e2 g; o5 G% w" y! B6 @5 E

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in P_C, you need to send to die.5 x" j! l  d) z0 G; s  _

) _) c3 W+ ]4 o3 cThen You need to add a L_Control to drive up the whole simulation. and a Run Control of 10000 days.
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, j" H. y/ f. G7 `$ mRemember 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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