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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,: o# c9 r$ \- N7 L+ y
  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.
# M# M0 m/ q3 l5 \5 z0 G  Loads are processed by each operator for the following time:
6 V9 `! T- w7 G4 Z. C  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.
; O* t) n5 U4 Y, @, 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.
! ?$ {& x! @, j( @  P7 }  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.
6 t  p; [* j" z) 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.$ H: t! l  y  n* o# T6 J

; }& t8 V; @; `5 w- N+ F问题:
( r0 ?  e' N# w7 x) H1 |) gAfter running the model for 10,000 days, what was the average number of loads in each process?
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5 j) Y5 n7 W. R7 t! Y3 X不胜感激!
发表于 2009-10-6 22:36:13 | 显示全部楼层
begin P_A arriving
! a5 b% ]; R: A+ ?: R+ `move into Q_wait /*Capacity is infinte*/1 O! F9 k2 z- J0 ^6 c
move into Q_process /*Single capacity*/
5 `/ d9 P0 |% S3 i$ [9 g: I5 t2 i3 F5 `
use R_A for n 60,10 min /*Resource A*/! r7 a  |+ N8 A1 X6 x: R( x' p

5 f0 Z! F( {8 z2 u! ?4 H, }send to P_B
: A8 Y" T  _1 r$ h# D6 q! aend0 b+ F6 b! I- L  F+ i9 h9 k

' K3 }1 s, ~; |# t1 {7 TP_B and P_C is similar
# a5 H( o: J  r/ m5 ]triangular 30,60,90 min
1 Z( w" ?) W8 ~u 60,30 min
9 e6 w0 v# \; X, T6 C1 {) W  k# ~6 q7 y
6 P! f/ k3 j6 I5 P+ O2 }( j6 T
in P_C, you need to send to die.1 c. c. r% i# g& L6 ]3 n  P

3 p% E1 e) j) Z$ Q2 }0 g) ~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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: c* Q8 H' o, a: h( N# B  J7 X% d/ a% fRemember 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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