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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,* P% G. g' b4 \' T7 v! }4 o
  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.
0 d; j" q: W- P6 e  Loads are processed by each operator for the following time:
7 n( d8 ]# N6 L  P: K0 I  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.
  j: c' J( }* v2 B, ^7 n  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., W4 ^; S( D/ r& H+ c, m. y; O7 }# X
  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.1 m& b; n9 u8 H
Send 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.5 N/ a( z# n5 ?

0 t  p6 ]3 a0 L! o, o问题:
# G. A8 F' Z8 L: H8 I) cAfter running the model for 10,000 days, what was the average number of loads in each process?& b( G  f: S" }6 a' O1 q

7 f6 E& D1 k" a. o( }3 S+ ?: Y不胜感激!
发表于 2009-10-6 22:36:13 | 显示全部楼层
begin P_A arriving
' D3 X7 q% y$ A) Y$ Y7 U3 R' S7 Rmove into Q_wait /*Capacity is infinte*/
/ }6 t+ k  j+ M7 m( Jmove into Q_process /*Single capacity*/
4 R+ f1 L1 b: r0 l" `5 F6 X0 Z) n3 C( ~3 V# U
use R_A for n 60,10 min /*Resource A*/  B9 d: ~* j: ~8 X( a$ D

5 R4 h4 f2 Z5 ]* x8 W/ l! L& ]0 usend to P_B
3 p! _- a& L+ P$ Gend& Z5 N2 J" H9 a* x. W. M  ]( z
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P_B and P_C is similar% J, d& C0 B8 Q' E+ S& f4 a
triangular 30,60,90 min2 q; ~# U7 I' k( ^9 _
u 60,30 min$ t- k$ Z  e7 {6 y5 B$ Y8 b; ]

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# ~. z# A1 S; ?+ h5 t7 Kin P_C, you need to send to die.7 W! `$ E  i$ y7 v0 T& d3 u9 X/ K

$ R, j; I, ]: ~6 K) h( h$ SThen You need to add a L_Control to drive up the whole simulation. and a Run Control of 10000 days.
  \. E4 a9 H. }9 V
( q2 }) \: R- n0 v) Z6 _# c
! a! d6 w4 J' g6 m& c3 MRemember 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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