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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,
/ @) j( ^# |" b/ e4 W) q0 H7 @2 {  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.
- e5 f2 ]/ W7 c  Loads are processed by each operator for the following time:
. E4 _% O+ e2 _$ Y4 }  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.
) j3 B8 ^9 |( K& D. O* v' L1 `  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.
1 G9 _% N  T3 |0 d  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.
: ]& f/ N6 I  e' B- F+ PSend 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:+ F9 n& ^" B. o0 L
After running the model for 10,000 days, what was the average number of loads in each process?0 l8 u& S8 H. Y9 o! w
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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- w/ h  T3 m9 ~) x4 ?
move into Q_wait /*Capacity is infinte*/- H5 i3 ]6 h- Q/ W6 o; h1 T
move into Q_process /*Single capacity*/
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use R_A for n 60,10 min /*Resource A*/. B2 K  q9 N5 U  v7 w

9 @5 o. O% t/ r- I! p  b$ Fsend to P_B. ^/ b0 F- J( B  \
end# ?2 S' l- A/ J0 _  ]* X

: ^% e7 e$ R$ B8 l% l9 m1 L1 A) `P_B and P_C is similar
% d7 j( F0 U) d& }9 J7 [triangular 30,60,90 min9 f& {$ b& y& U9 e
u 60,30 min& s; w2 t0 g$ h% @
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in P_C, you need to send to die.
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9 F& N, z( H3 e1 f' ?1 K4 h- ~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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1 ^# z# a( |8 nRemember 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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