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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,
, K2 i+ @7 M" |- Q; 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.
6 r% F: v* k2 {  Loads are processed by each operator for the following time:% x5 c" Q+ J" d
  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.
" i1 Y- L% G" `$ k/ M9 N7 K; G) 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- K8 e- X( |( d
  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.
1 Q+ I  j- J3 K' JSend 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:
/ M" _9 ]4 x8 J' }& ^  KAfter running the model for 10,000 days, what was the average number of loads in each process?/ s1 G2 S4 p: |) @
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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! @& T6 g9 L# T3 x: b9 {
move into Q_wait /*Capacity is infinte*/
* |' |  C  V% n& ^! _move into Q_process /*Single capacity*/# \' ~+ x/ l& N  K  K4 {2 V
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use R_A for n 60,10 min /*Resource A*/
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, A( _, o7 k, G; p3 Z2 b6 qsend to P_B
' U. n7 E% `5 n+ fend6 h' K( g+ V7 I6 M; x

( W; U/ \. V% B4 K% Y1 Q" LP_B and P_C is similar
0 t  E' S; U( _, J% o0 t, Jtriangular 30,60,90 min
! B% p; X2 y# M4 N! W; \: W: Vu 60,30 min
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# d8 [7 J, y0 U; Iin P_C, you need to send to die.+ l/ L; Z- S% @; M% J

9 P9 r' a2 I* k0 o3 [$ I' F. C- IThen You need to add a L_Control to drive up the whole simulation. and a Run Control of 10000 days.* @* L8 ]+ L. Q! p

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: H8 Q* X1 o2 }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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