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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,
6 ~' B+ Y- w0 C. W* X  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.% l: S5 j; Q; a) W
  Loads are processed by each operator for the following time:5 r" {3 z* \0 \( f. s7 ^
  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.
9 h) |3 ?0 L/ V* X3 L  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.$ J5 c* a8 C2 O) h. Z' |
  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.5 k3 `( B% u! E' ~. ~; `; q4 L
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:
* t$ f' V0 ~: M8 E* I( mAfter running the model for 10,000 days, what was the average number of loads in each process?) }: @4 @% y0 m/ L1 \: _  g1 |6 t

7 h' ~1 W" L, V9 Q4 z- Q不胜感激!
发表于 2009-10-6 22:36:13 | 显示全部楼层
begin P_A arriving. }' o  `# A/ J+ `$ P0 u
move into Q_wait /*Capacity is infinte*/
/ [5 f7 Y7 w) Bmove into Q_process /*Single capacity*/
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use R_A for n 60,10 min /*Resource A*/
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send to P_B
& H9 ~  V+ k" r: D; ?7 X2 qend( O+ ]/ m5 h, d6 @) s, |1 g

4 ~1 S4 k% Z7 m+ S7 A9 x0 }2 LP_B and P_C is similar
% {8 z( q) l! ]) P/ t5 n2 Ytriangular 30,60,90 min
& Z8 R+ r+ O$ {0 h6 b4 a4 H: Su 60,30 min# `* j4 ]" S3 q& G1 w

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in P_C, you need to send to die.  r' w3 i& w1 Y% z; H
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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.1 G: {5 A7 i4 j* H( w
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( R) m6 u) {( ~9 q1 N0 W3 |7 q0 q8 xRemember 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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