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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,
3 p( [0 W8 W& l! f5 h  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.
6 s+ F. N6 u7 G# Y  Loads are processed by each operator for the following time:
% Q( p9 x9 Y6 ^# I: `! v  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.
( d: }2 T5 q+ x4 r* ^4 |1 x- f3 ^  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.
; w5 a: p/ a/ ~% L  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.
3 ~1 G0 |! j; o  U6 iSend 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.. c$ n" V( o+ k3 Y3 m

3 C& d, m: O9 n& Y/ N% ]2 R问题:
0 i' a* l2 T2 f3 m0 OAfter running the model for 10,000 days, what was the average number of loads in each process?5 e: F5 V* |! ?
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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) ?& `1 E& X( D3 ~7 g
move into Q_wait /*Capacity is infinte*/% M2 F4 J9 T! K: A" t- |4 a
move into Q_process /*Single capacity*/
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6 r* W: q0 g6 I' |$ C) Q% ?use R_A for n 60,10 min /*Resource A*/7 I! z4 K) {+ g8 a6 |& s
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send to P_B
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! ^4 l4 s0 Q$ W" rP_B and P_C is similar
8 {1 u5 M$ {! }3 W- k' qtriangular 30,60,90 min
2 s6 I. Q1 _; y- T6 gu 60,30 min
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in P_C, you need to send to die.4 ]. M- x# g- u* |5 y. ~" T# Q
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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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