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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 V* \' a6 z( A6 [- p+ B  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 b3 V# e0 P# N* {$ P7 X
  Loads are processed by each operator for the following time:/ O; ~# D7 Q( h: _' d( v! f0 \
  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.
2 E) b$ _. R6 `+ v  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., c' k) a5 S) K1 y4 {/ N
  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.$ B" H3 k* D! L1 W* @* g8 S4 u
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:" r6 N7 ]9 x( F2 Y7 F
After running the model for 10,000 days, what was the average number of loads in each process?4 r) Y/ O1 a  O$ a( \

( T: d$ R. S" t$ S不胜感激!
发表于 2009-10-6 22:36:13 | 显示全部楼层
begin P_A arriving
$ z( x" f* d, ]: [# V0 a5 Umove into Q_wait /*Capacity is infinte*/! [' L$ J+ G2 C+ f: w% @
move into Q_process /*Single capacity*/: ~; R1 ~' k; O/ w
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use R_A for n 60,10 min /*Resource A*/8 M# s0 l" r$ a; z1 H
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send to P_B
4 P1 v2 ?) K1 `end% G- Y$ d$ k& s

( W- j9 i7 F; f6 D' ?P_B and P_C is similar
* C% q; \' W7 o5 ]; p2 J+ Utriangular 30,60,90 min
0 \6 }6 {4 B. W" Q! E: e, i' Wu 60,30 min
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in P_C, you need to send to die.
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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.' z) n( [9 b' u
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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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