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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,
' ?- }. y- j9 ]) s" ?, |' B  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.* e0 g! w6 i3 F1 R# h# f8 U
  Loads are processed by each operator for the following time:8 L* Y" i) k. w3 R& l# ]6 r
  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.
4 ]7 H9 g# X5 A9 V/ X1 K% S: 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.
$ i% S: D& u; G4 ?+ U$ S: d$ F  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.- F: M7 Z( B( K) d$ o  ^
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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; x/ D, m, z% c2 r$ _问题:
. z  s% j0 \& _! s& w& ~5 h7 E$ QAfter running the model for 10,000 days, what was the average number of loads in each process?
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+ H0 Y* f4 B# K* }# K, X+ [不胜感激!
发表于 2009-10-6 22:36:13 | 显示全部楼层
begin P_A arriving
* w, |" C8 Y6 w" |move into Q_wait /*Capacity is infinte*/& Z: ^3 Q2 R  D6 ~4 y
move into Q_process /*Single capacity*/
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use R_A for n 60,10 min /*Resource A*/
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8 z' E/ |9 E& \/ r) |- Tsend to P_B
1 ^: ~' m3 a9 D. r% q8 a* Uend
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P_B and P_C is similar
: m" ], [3 s' |  a) ^1 O- rtriangular 30,60,90 min/ V. f- a6 S# \: j: M
u 60,30 min$ G5 a+ K6 d  E: N1 F: A) G
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3 |1 Z9 c! m% |' {in P_C, you need to send to die.: d# {  R: o3 E( Q5 F. ^# y7 ]% \) Q! T6 [
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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.6 S2 \+ J8 u: U
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- y- e. W3 h" j" x3 i" L1 w  f& [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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