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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,) S8 S# M5 }. P$ d/ j
  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.
' T2 `! m& |, o; z* w; i4 A3 `  Loads are processed by each operator for the following time:
( p- q- ^. O/ t: x: p5 F  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.; h0 @4 P8 G+ X& K  ~$ m3 n  {" Z
  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.; ]6 E0 n0 h# T; R
  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.
7 K8 i  |$ M: fSend 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.! l0 _" @  I% T+ a
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问题:3 `/ y6 X5 t% T  U7 A  }: d  d
After running the model for 10,000 days, what was the average number of loads in each process?8 Y* p: w6 U7 U4 Z4 k/ g  ]7 ?. y" y
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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
4 M: L( S9 Z, l/ g* T: xmove into Q_wait /*Capacity is infinte*/; Y9 u* r& d5 l2 h2 q
move into Q_process /*Single capacity*/0 ?. N. E6 t2 d

# T" d* ^/ t" g- nuse R_A for n 60,10 min /*Resource A*/
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) A  M! T/ w4 v& D3 j9 I' ~send to P_B
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5 b- y  o! C% s2 F6 m# N, h, dP_B and P_C is similar
8 j8 ?, m$ K  t  `3 l- Ttriangular 30,60,90 min
* U- G* x$ L+ Iu 60,30 min+ _7 p2 R& m3 Y& T+ x3 @1 z

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in P_C, you need to send to die.+ I7 j$ ]2 y- S' Z% s

* @' m  Z. E! CThen You need to add a L_Control to drive up the whole simulation. and a Run Control of 10000 days.4 Y4 N1 V& z+ s4 u4 W
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  a1 t" U( n, [( m3 Z% e6 eRemember 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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