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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,
4 E3 s6 u( i+ `" |7 g  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.' v0 {2 D: h* V
  Loads are processed by each operator for the following time:
$ F7 A4 G$ y  ~5 o& h7 u  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.
7 D' w7 E. o, c  D: P, _3 ]  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 Z: k# }. n$ ?3 t1 t. ~" Z
  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.
# L/ P* W' p, u- DSend 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:+ l6 u3 z$ V( M1 C+ H- X
After running the model for 10,000 days, what was the average number of loads in each process?; F) f. }8 l( ^; X1 `5 L1 B$ w
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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: j4 u/ z* B$ x1 H# S7 o
move into Q_wait /*Capacity is infinte*/
; }1 D- g4 M$ r7 ?1 zmove into Q_process /*Single capacity*/: G3 H; F1 _2 B8 t( v

+ q' G! i) e: J9 Z) R% iuse R_A for n 60,10 min /*Resource A*/
+ X4 p2 P/ U$ H8 r- j# n' M
. W+ J6 n1 ^7 i4 z4 Y6 osend to P_B; A# y. r5 }$ o7 E7 }
end$ Y# W6 v  `5 Q" {% V* M$ L" t8 l. B
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P_B and P_C is similar
2 @$ c7 T. ^, gtriangular 30,60,90 min
+ }+ o7 H8 d3 l5 {- K* g& z+ G7 vu 60,30 min
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2 l" I# n; U7 N# sin P_C, you need to send to die.) q) g8 \0 {% p+ P9 i/ t

$ U# h1 f' A( m6 c8 h% oThen You need to add a L_Control to drive up the whole simulation. and a Run Control of 10000 days.0 r; _* t7 J/ y/ v3 f9 @

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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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