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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,# k% j, p/ |* Z
  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.
) g2 t" m$ y( _$ S2 V) j5 l  Loads are processed by each operator for the following time:
5 ^6 K1 k; V5 k% y  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.
# I, F5 p; m( c" O# Z6 L. e& Q  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.7 Q) e/ R" }; Y- i$ {
  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.
2 I. X# q: e9 @7 F1 U, rSend 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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问题:
2 A( z( v, b. D; F0 JAfter running the model for 10,000 days, what was the average number of loads in each process?
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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' t7 }. Q: D& E+ S& Q/ a
move into Q_wait /*Capacity is infinte*/2 f: m# l, _6 ?2 F. @7 h# }
move into Q_process /*Single capacity*/0 \, ~) O, N* s  |% k: [$ Z
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use R_A for n 60,10 min /*Resource A*/6 E4 j3 x) N9 ~; M) ?% q: t

7 _5 I& m5 {" ]3 `0 Z* n% K7 S" Y9 D# Tsend to P_B, G6 V# S6 L; Q6 ?- Z
end) C: I# b; o, ]' A+ K' y

" s/ R; {+ o# x& zP_B and P_C is similar
; C$ i0 ?: p) l' ttriangular 30,60,90 min
& ^7 z, x# f" {1 mu 60,30 min
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in P_C, you need to send to die.) k; T' O  S$ D9 H" T
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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.0 C% _+ l0 {' I, g, ?1 l
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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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