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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,/ a* b4 }( s2 ?9 j* D
  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.2 R, G3 b7 c5 ^# ~0 g/ x# D! a! H
  Loads are processed by each operator for the following time:
7 G1 z, |$ \( C* f. I7 i4 y  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.
) S7 p$ h; P' z) z5 g( C  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.3 \  P- G! g  ]/ u: P
  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.  T* O/ ~& ?- Y
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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问题:
1 N3 W2 y0 a) v6 K9 kAfter running the model for 10,000 days, what was the average number of loads in each process?5 |8 C' J8 |. j. U1 M) @) f& A

0 E5 ]( J& M1 Z* x+ H5 g* o( n不胜感激!
发表于 2009-10-6 22:36:13 | 显示全部楼层
begin P_A arriving5 n: W! T5 e! ^0 f& t- P
move into Q_wait /*Capacity is infinte*/
8 o' `: }+ M9 Q3 Tmove into Q_process /*Single capacity*/. u1 u2 I$ d2 P/ @
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use R_A for n 60,10 min /*Resource A*/. e% G. }, Z9 K. x: n2 F( l

0 R, g3 k$ p% [' z# @" N& G( l  ysend to P_B
1 V" `6 F3 |+ V& h/ ~end
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- ]6 c# U7 h" @; [; ZP_B and P_C is similar
# \( P' M6 r, A$ ^! \/ l( Z1 Z3 |# utriangular 30,60,90 min# P7 v- m% T+ _: L" G
u 60,30 min7 a$ }. P: B2 Q' |; m$ g6 }8 X
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6 I0 V2 I  P# I6 m  ?* A' M+ E: gin P_C, you need to send to die.
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* t5 w! w7 i/ r5 u( D/ ?) t  o6 gThen You need to add a L_Control to drive up the whole simulation. and a Run Control of 10000 days.% ^! e$ {5 h' u2 g) a8 S
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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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