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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,
8 b$ ]" l" p! X  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.
/ Z( G5 Z0 t' ~0 r' Y  Loads are processed by each operator for the following time:
7 R- I$ D( {+ Q) f9 E# e  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.  U+ A# s# I4 q% F) I% i3 A
  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 k( B* Y2 ~  R3 J* P: i
  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.
) M) Q3 b- m% r( kSend 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.9 A- e: F3 L$ w

5 A8 Y- b" w- K+ U. O问题:
0 c8 i7 k# N- N4 V% T& {2 ?( s# xAfter running the model for 10,000 days, what was the average number of loads in each process?3 ~$ W! `$ x3 v' S

3 N& B- c7 n3 ?" I/ u8 N不胜感激!
发表于 2009-10-6 22:36:13 | 显示全部楼层
begin P_A arriving( e. u8 ^5 l8 `9 l" [$ b6 v
move into Q_wait /*Capacity is infinte*/
! V, z8 Q0 }0 Z& |move into Q_process /*Single capacity*/
% s3 }) Y& W1 b4 m6 d1 Q  I
! E# X1 n+ Z3 l2 s% Wuse R_A for n 60,10 min /*Resource A*/4 O, a) o- J5 N; ~0 K+ O- [

7 I' r' `3 x8 f! S% Y0 f7 v( |send to P_B$ R: O! I% i$ L; E3 U
end2 [1 m# f$ }" U
5 e. E! a0 G( p. ~* \2 [
P_B and P_C is similar
0 Q: \; y$ q. T* ]+ o/ k" }3 Q8 p: ptriangular 30,60,90 min9 X; B9 ?) A' s* k
u 60,30 min- }- a0 |3 M# L+ A5 F1 u

/ d5 W) k: ]5 i" z/ V7 M) l/ I- R! P& ?$ _$ ^  S  o
in P_C, you need to send to die.& M7 h( R& Z2 D) a9 C' e' l
& l+ _, ?2 s3 k% |4 f) ]5 U  W
Then You need to add a L_Control to drive up the whole simulation. and a Run Control of 10000 days.
1 J& @5 ]8 w1 r+ j' M( U: w/ I$ d# D9 L6 k# k6 S1 H
" q$ I4 i/ |$ D
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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