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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,- T6 ~% M: ?+ m
  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.' g8 k& w0 c6 G4 r$ L- A0 q
  Loads are processed by each operator for the following time:
: P5 n# Q6 g+ v  [! E9 K0 l  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.
5 ]9 q4 N+ u2 X5 a2 U  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.
* ]" @$ v& N  b9 z  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.
, {% ?2 `! x% M# _- s& SSend 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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# ]2 w/ J' l0 S9 K0 j0 x- U3 k# F问题:
. _* E& o) h. J3 D9 q. @After running the model for 10,000 days, what was the average number of loads in each process?1 b% J; r7 I. r6 Y' w% d( H5 x

9 q: {! P' ^0 ?不胜感激!
发表于 2009-10-6 22:36:13 | 显示全部楼层
begin P_A arriving+ G2 O. q! R) \& c6 P6 M
move into Q_wait /*Capacity is infinte*/
: h& a9 I  s* N: w/ S  tmove into Q_process /*Single capacity*/  k; g6 C" F, o0 ?/ `1 }4 N
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use R_A for n 60,10 min /*Resource A*/9 Z+ ^2 W/ P- A- Y! [6 k* |

: @4 W% V" w$ E) h6 msend to P_B2 w5 y9 v  z: W$ _
end- i& f9 v6 ~% }! B* C) t9 C+ s- H
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P_B and P_C is similar
5 c9 E  B- g5 dtriangular 30,60,90 min
8 c( h9 i. {( @$ M0 Mu 60,30 min8 v! ~/ i! f: c: V. _  L

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, ?  K3 Q3 f8 {! G7 `5 b" K9 y; kin P_C, you need to send to die.
' v5 t/ ?/ H  x) h* `- }8 F. N4 w% P; w( E$ b' ~, K7 _: m# h/ y
Then You need to add a L_Control to drive up the whole simulation. and a Run Control of 10000 days.
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& k6 Q) ?% K/ _. bRemember 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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