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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,  i/ _; w/ m2 ~( ?0 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.
7 I  q6 r4 @; E( C. N: U2 k9 \  Loads are processed by each operator for the following time:: F7 [7 N2 d: F% f
  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.
8 ]( `: t- P% \8 y  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.
% u4 }5 M4 n7 u7 H( Z- q  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.
, V. H) E$ L) K2 S7 g$ }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.7 B, ^" t7 M8 O, R

0 |; t- @) Q) r  H1 x" M' N1 \/ |8 [2 e问题:
8 N+ ^7 q2 B# Z; `After running the model for 10,000 days, what was the average number of loads in each process?$ M, T1 F  P/ n* O) b

" r8 W. c! x" d4 k0 G* G不胜感激!
发表于 2009-10-6 22:36:13 | 显示全部楼层
begin P_A arriving( g- ^0 V% k0 \  k5 s5 {
move into Q_wait /*Capacity is infinte*/
0 [& {' ^9 k5 k9 s4 Xmove into Q_process /*Single capacity*/
* W* b4 ]* L8 H7 ~; y( \4 }- c) W+ v! m
use R_A for n 60,10 min /*Resource A*/2 b# {6 A' k8 m$ Q3 w
7 a* ]" Q& R/ n0 P8 m3 @; N! A
send to P_B
0 Q6 a: E, Y6 t2 kend9 x) y" q' s" b+ S. u7 s0 U/ G

- s  s( `8 k' q2 J- V+ s4 Z, YP_B and P_C is similar
+ U1 @, q# E7 ~! B6 l" Ftriangular 30,60,90 min  w' m' d) X4 @7 f
u 60,30 min% W6 q7 U7 C, y0 J2 N
5 f$ v8 I# w$ j( S& l9 @; D

7 }8 o  ]! h7 C" C! S/ A2 J% ?in P_C, you need to send to die.8 H. t2 q) I8 W* V( m+ i& o. r

: t( i1 n9 E0 Q# f7 oThen You need to add a L_Control to drive up the whole simulation. and a Run Control of 10000 days.
6 V' r* G- Z$ U/ X, E# V3 {" [" w7 F. I

1 H3 A5 Z9 e: P6 p7 ~2 y( ^& D) `* s. T8 LRemember 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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