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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 k9 i; s; k2 t  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.9 |2 H7 X+ R/ N/ j, K4 {1 }
  Loads are processed by each operator for the following time:: x- X( V+ C: ~  m' V) f# \, P
  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.
# `3 o/ B- |0 g  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 U6 `( t' }% r1 V4 q, V+ X9 Y
  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.
2 @* E" r; |' ~1 ^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:% P, H" {8 ~" n* J
After running the model for 10,000 days, what was the average number of loads in each process?8 @- |$ i. s3 E' x1 y& G! y( j

8 S# u- `$ ?7 j6 l- U7 ?不胜感激!
发表于 2009-10-6 22:36:13 | 显示全部楼层
begin P_A arriving, U- |0 Y" H& b- s( R; i
move into Q_wait /*Capacity is infinte*/
) }' S2 `1 R% Kmove into Q_process /*Single capacity*/% t) `, ]+ N- @0 L% h$ h) @3 `
! v- Y/ Y1 Z9 x
use R_A for n 60,10 min /*Resource A*/" S* x$ s2 p! J9 _$ w9 t/ `

4 y! F- `* m/ Y; B3 e8 }send to P_B& h; W& ]  ~, O& O: u
end0 b8 ^: f- }) Y
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P_B and P_C is similar
6 c7 C! ^  S1 V$ o" P2 i2 Ntriangular 30,60,90 min
4 n+ z- E4 u4 S9 v( P5 R" r& y: cu 60,30 min
+ g9 ?8 X- f' L  t
. S1 _, k% ~" s( l  i8 F
  H* E) }  A- Q0 Xin P_C, you need to send to die.
  M' ~, @: }$ P3 V/ c
( ~2 I8 `$ @: v; s" T% MThen You need to add a L_Control to drive up the whole simulation. and a Run Control of 10000 days.
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) {0 b" j+ y, l2 K5 C9 R- P) S6 [, |" d$ a! D/ k
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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