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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,0 x( K7 f# q0 Z  L; b, `/ p
  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.( @' c! i$ s7 x; ]8 g
  Loads are processed by each operator for the following time:
( ?( J% I  W* i0 j! S  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.& Q$ ~% Y. o0 O' K: j" K
  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.
  ^9 L/ F, H* B2 N) D" }3 w  Worker_C does the job in a uniformly distributed time between 30 and 90 mins./ A" a1 B4 b6 c7 f5 s5 d
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.9 i. s, a+ h- }. r
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问题:
2 g: E9 b  s0 v8 M! FAfter running the model for 10,000 days, what was the average number of loads in each process?
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' ^6 L# M7 C, I8 r9 ~) t不胜感激!
发表于 2009-10-6 22:36:13 | 显示全部楼层
begin P_A arriving
- i* {; e7 T) c! Y7 c5 j' D" a9 Zmove into Q_wait /*Capacity is infinte*/0 v2 \0 j5 f6 V0 I6 E
move into Q_process /*Single capacity*/* X" m" V$ O; i

0 M; [/ u1 E+ {) p1 juse R_A for n 60,10 min /*Resource A*/% }- t0 h% r; f

+ ?3 J6 ~0 Z, T; Rsend to P_B- a- V1 |% U- ~$ B* p/ Y( D
end* p) m2 O7 D# w7 C* l: ~

( d# L0 U. Z# ?: TP_B and P_C is similar
! V( f, V1 r; }  Etriangular 30,60,90 min) \; Z! V4 \9 E5 V
u 60,30 min' P/ l9 A* ^: ^( i2 G

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in P_C, you need to send to die.
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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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* g! C0 D+ x7 {, \' wRemember 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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