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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,5 w- u2 z3 C: _# 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.
( {  P5 b  j  I. y: h  Loads are processed by each operator for the following time:
# ]. {7 g0 o+ O7 W  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.
3 v4 E# B/ r- C/ y+ R4 j  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.
# e+ b5 v5 C* A# M% r6 T+ U  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.
, s8 F+ R) n7 b4 T- z' eSend 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.$ z2 m. c7 Y! K2 |1 y9 @3 N# z' q
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问题:
) k! A2 y4 \! \0 A) bAfter running the model for 10,000 days, what was the average number of loads in each process?3 p+ O7 I3 C9 d/ T

4 ?4 c$ d9 H6 n; X4 J不胜感激!
发表于 2009-10-6 22:36:13 | 显示全部楼层
begin P_A arriving
$ x. \8 N- J# S5 \# {move into Q_wait /*Capacity is infinte*/% Y9 I! a+ |' b0 t. G
move into Q_process /*Single capacity*/' d7 \- A( W) o. m" ?. G/ V- S
' U6 P5 s$ ^0 b* T/ t1 w! F- @' S
use R_A for n 60,10 min /*Resource A*// L5 M" Q* ]8 Y4 H

* S& N2 a5 C" Csend to P_B
9 f! \. v& F- S$ H/ l) p) C0 `end
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P_B and P_C is similar
: H1 d: o0 q9 ~0 r% Atriangular 30,60,90 min
& `: b8 u! h$ n0 X0 U" @" B# au 60,30 min' e2 L9 v% }) Q" s9 ]

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8 N; Q" o8 I) I0 P( e2 rin P_C, you need to send to die.6 H7 ^! W" H! \5 ]

, F8 u, }9 U2 T0 ]9 g* h' O  GThen You need to add a L_Control to drive up the whole simulation. and a Run Control of 10000 days.
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( O6 x+ {0 m9 u& k! B- nRemember 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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