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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,+ _' F! I: N6 {
  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.
! ^4 q6 j' a+ \1 |3 s1 u5 c* O# f  Loads are processed by each operator for the following time:1 {: X# l( @3 t0 J: b1 r
  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.1 y" R0 {7 j) h- d
  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.
5 Z+ ]3 x0 M, ~9 k  e8 q+ {  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.. b' a4 R7 i5 p  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.
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% t" y2 C; Z" l+ D  t问题:
% U' ?. q7 Q+ o7 Z9 sAfter running the model for 10,000 days, what was the average number of loads in each process?1 `/ D. ?3 A' M$ n$ V
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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& j3 ]: n/ Y. g6 B3 e" v1 ~: N
move into Q_wait /*Capacity is infinte*/5 r; z$ {0 ^* N
move into Q_process /*Single capacity*/* ?0 u+ B+ X6 l

7 Q; ?' F* h" v  q2 S% [use R_A for n 60,10 min /*Resource A*/
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send to P_B  F9 s; I1 I% H" D
end
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P_B and P_C is similar8 {. n* F- k! J( w8 d
triangular 30,60,90 min# H3 x% j& g8 x
u 60,30 min7 x( r- i) ~1 ?& \# `
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in P_C, you need to send to die.  ^7 _+ W. i, R& h) o

6 j, U* l" e& a- V: ~% |* mThen You need to add a L_Control to drive up the whole simulation. and a Run Control of 10000 days.
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+ P% b& D; J2 g) |- E' ?. 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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