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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,/ R8 R( D0 |0 D0 c7 r. }
  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.* f3 ~: g2 G  f/ l: Z& `
  Loads are processed by each operator for the following time:2 a" C6 A+ {1 [
  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.. N: {4 ^, K8 ?- _' M
  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.
6 d* y9 I( x3 ]' `% y$ K  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.2 r# z7 v: j# g9 i+ V3 z( N- N# e; J
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.6 g# b- H$ B% p
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问题:- Z3 D9 ?0 f  w& C  ~" M
After running the model for 10,000 days, what was the average number of loads in each process?4 K" ]( H+ k8 ?' c8 A

3 ^2 ?$ U# D# R: B4 {7 M: e4 U* x不胜感激!
发表于 2009-10-6 22:36:13 | 显示全部楼层
begin P_A arriving
* ]& A# r# L" V6 M% A" c, d6 nmove into Q_wait /*Capacity is infinte*/& L; r. @- y0 j; g
move into Q_process /*Single capacity*/0 g9 U' r" D/ s  D5 ]8 {* N+ w) z/ ^

5 z* J  n: N  I0 e% E( P* b3 ^use R_A for n 60,10 min /*Resource A*/: A; ^, ^) u& R. {: N/ F
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send to P_B
9 f% s4 u9 r2 @3 S1 qend. S. w+ x7 a% x: X

  m) h: H  E1 Y6 u7 ~8 }" w3 Y  h' G( _P_B and P_C is similar) ?, B/ V% B. N; h  B
triangular 30,60,90 min' p; e( s1 \, b& O
u 60,30 min) d) p" N# m+ [9 }7 {
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in P_C, you need to send to die.
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& A) ?' a3 ?$ D/ ~Then You need to add a L_Control to drive up the whole simulation. and a Run Control of 10000 days.9 Q8 f6 q5 ^* Y2 S! i  ~, ^

! x( h% Z+ c, w$ O. @) B
7 B0 s( C, y1 E- zRemember 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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