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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& U8 y& J  T4 Y1 S1 w0 J. h  ?  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.
) Y; R: G, _) Q) P  Loads are processed by each operator for the following time:
) G$ v8 D6 G8 M; b. F( d- s1 n  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.0 _3 x5 C% l8 ?+ j8 H
  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.
! z/ }: y+ ?; I  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.
' |, r2 C2 K" B) C0 q4 q+ X' V9 I* lSend 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.1 J& w  D# v2 |8 ^3 l  Y

7 A: W0 \0 k' U2 Y问题:
. p0 s( h+ ~6 w: }4 ?( t7 }After running the model for 10,000 days, what was the average number of loads in each process?1 W7 k+ T! X# e* N+ [# B
+ x0 c. c, ]* L7 B
不胜感激!
发表于 2009-10-6 22:36:13 | 显示全部楼层
begin P_A arriving
( T. O2 h7 u5 qmove into Q_wait /*Capacity is infinte*/
9 L, L' G7 Z3 ^$ p4 }/ B5 U8 ?$ xmove into Q_process /*Single capacity*/
. O6 h% [6 n3 H" H- S# c  M( a
1 H, E/ T  M1 f( _, euse R_A for n 60,10 min /*Resource A*/3 T# I7 J1 N3 \" Q, C1 E- r
6 p; y+ {, I) o, D
send to P_B
" {& W& p8 v: W/ H7 Iend
' U4 _: @, {+ g; }3 a8 s4 C/ c* f$ N/ _# W8 j
P_B and P_C is similar
$ G% G& ]: G( ^- Y  j7 g+ D2 m: @  \* jtriangular 30,60,90 min, A8 b1 i9 e: N9 \
u 60,30 min3 u1 A, c; `2 Z2 ^0 d! _
. U: F1 G4 `# y; C% ~  r3 p2 {

0 k3 ?$ K$ \6 z, i* G! o; uin P_C, you need to send to die.9 ^) U# b. j! L) g

! x+ C" Y4 x4 w  z7 [Then You need to add a L_Control to drive up the whole simulation. and a Run Control of 10000 days.3 b. z7 y& p+ o1 p1 Y4 R: Y  j8 F5 c- x

+ z  A0 B/ f) F& A9 d8 ^% n4 O% L) {3 e
Remember 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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