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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 I  q' b" {* T' X$ A
  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.
5 f9 a) U( g9 E, Z! O  Loads are processed by each operator for the following time:
; d: g) m% ?4 ^% r5 _  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.
3 u; G# v. T7 [3 M2 ^% p  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.$ R9 I' r1 k8 [6 Q; `5 h0 V
  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.
6 q; v# D: I5 b$ i9 xSend 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.3 ^3 ^7 q* p, Y$ c/ q
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问题:( \; k/ h, F# _( O# o( B
After running the model for 10,000 days, what was the average number of loads in each process?+ {. A( k" Z9 R! g
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不胜感激!
发表于 2009-10-6 22:36:13 | 显示全部楼层
begin P_A arriving, p$ E1 z7 ?4 _7 U
move into Q_wait /*Capacity is infinte*/; ]' z/ W! Y5 D7 H
move into Q_process /*Single capacity*/
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use R_A for n 60,10 min /*Resource A*/
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4 z% w! N! ^& a2 u3 A6 gsend to P_B2 A# a& h% S$ W( e# Q+ q& \, d6 j1 u
end
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* w5 X) J0 K0 E# j5 \6 g$ QP_B and P_C is similar1 \' Y% t' \& z$ r! G  H
triangular 30,60,90 min
# i7 P: z9 Q! A: ~7 m. Ou 60,30 min
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in P_C, you need to send to die.8 J8 u! n+ W1 R6 Y) o' a. w+ i

1 D, u% k, J3 d# Z& nThen You need to add a L_Control to drive up the whole simulation. and a Run Control of 10000 days.2 y6 ^* S, `) S% w: p$ q0 n* {
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# t) S! Y* q4 e6 c) H1 b1 Q- g/ KRemember 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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