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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,
% r" Q9 _  d* H) Q0 \  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 j2 G! }1 L8 {" h; y+ w2 q/ l  Loads are processed by each operator for the following time:
7 c/ V+ [( L/ ]  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.- z; S( G/ u5 {% r& u% 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., O" F7 b, v; ~8 T; \4 g) H
  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.
% b8 w1 N3 v  h3 N$ X/ dSend 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./ V- V7 d: r" M5 |$ ~9 @4 J
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问题:& j. S$ E2 y# W( y! n  V
After running the model for 10,000 days, what was the average number of loads in each process?! @" W" F$ M7 v) r4 I- D- l6 N3 o
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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
& T1 |  f% ^+ W1 O8 t3 O7 xmove into Q_wait /*Capacity is infinte*/: y. Q. i4 v- S$ n/ m; A- M
move into Q_process /*Single capacity*/4 z5 ]) p; E5 l# f

! I' d, V$ P, xuse R_A for n 60,10 min /*Resource A*// K$ Y) T/ t7 k% L% o

) A5 N* ?+ S& \- ~/ Ssend to P_B4 E9 v+ Z% r) R  [( @, m
end0 d! ?0 X' o; S- w( L
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P_B and P_C is similar
3 _0 a  n3 y0 v! `triangular 30,60,90 min
& p+ u- i9 F, _- t  ~u 60,30 min0 z. ^/ x. s; M% a9 ^
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/ J8 W; C5 H* {1 j, Min P_C, you need to send to die.& ^7 I3 P$ Q6 g) M# s
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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.
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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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