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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,
+ j$ A! S$ D- D5 v' `: }  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.6 o  U- H$ \2 C- f5 J- S6 v
  Loads are processed by each operator for the following time:
) g: g% C3 h$ N3 b  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.
* C+ V& Q6 S/ z7 s$ F  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.8 H2 Z/ `3 P7 a1 e1 ~
  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.
3 @2 i* H! ~' T. H" g+ gSend 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.: u5 C& z1 n& J: G0 |" a, r# \
% \8 I" p1 T, X$ \
问题:, E" u# V( a# H- k
After running the model for 10,000 days, what was the average number of loads in each process?- k+ V! f* O' i( w0 g$ @) L

6 |! Y* d# d% N; h! G' R4 g不胜感激!
发表于 2009-10-6 22:36:13 | 显示全部楼层
begin P_A arriving9 u8 f# l, s9 B" p
move into Q_wait /*Capacity is infinte*/
/ ~/ l3 ^2 Z1 J/ m2 Q2 R$ Wmove into Q_process /*Single capacity*/
0 R1 \) d/ L' @9 N" W
  Q8 r2 Y* F& [. {( zuse R_A for n 60,10 min /*Resource A*/
% a! {" H# r8 `/ y6 F5 R0 K- I  i& F. r$ ?( k
send to P_B
2 s0 c) ~) H6 O( W2 X1 Gend
3 T0 O2 F+ |$ C5 ~$ {( y4 _: W) b5 |! A# B  y
P_B and P_C is similar
4 V; B5 \+ t9 S6 |3 x9 q0 Itriangular 30,60,90 min
9 F2 s2 z7 _1 R- fu 60,30 min9 t- n! q7 W5 o% e/ C8 ]
; `7 x( _; B. k1 Q1 F4 p$ t2 V

6 l& K; ?  Y' S( @2 @6 oin P_C, you need to send to die.4 q3 U# ~) s4 ^, N2 ]% X

1 |7 c+ h. C  ^5 x: wThen You need to add a L_Control to drive up the whole simulation. and a Run Control of 10000 days.4 f2 a" x" E6 r6 f7 v
, ]6 I% O0 ]* H# ?6 b+ l

: M  g6 N0 G5 R6 {  j8 sRemember 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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