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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,2 [" g0 m6 c* d3 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.
" @5 C- u. k' N4 x) T: i) s+ r9 P$ O  Loads are processed by each operator for the following time:# k3 f7 z5 Z# u( d/ k; K1 Z1 A3 w6 j
  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.
9 |" f) b! f, ]3 l: i  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.
2 v0 E2 D# X7 ]9 O7 B6 K" y  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.
1 G3 k- `) G$ E  @1 b/ tSend 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:
2 L& U3 N" q4 o! y* y, @After running the model for 10,000 days, what was the average number of loads in each process?
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/ h$ R5 z5 ?, d不胜感激!
发表于 2009-10-6 22:36:13 | 显示全部楼层
begin P_A arriving
: t) k# s+ v) W% Q+ @. X  z+ pmove into Q_wait /*Capacity is infinte*/1 f. l4 r) z& P2 c3 q) i; H+ o& ^( r
move into Q_process /*Single capacity*/
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. V- P/ n+ k) O6 S0 n4 T6 kuse R_A for n 60,10 min /*Resource A*/
( n8 b, z, h& n0 C& C( N& {
8 K4 ?1 ]+ Y: ~" \; m+ _( rsend to P_B
) D' T2 W% Z1 N, k0 iend- k; h7 v( a# h# u

! L9 \  U- R( Y) I7 r3 W; ~P_B and P_C is similar
7 D, P" p7 c: A/ Z7 |6 Utriangular 30,60,90 min
$ x6 i4 H# T2 o$ z  V; mu 60,30 min" N+ N4 ]7 \6 T9 y8 Z( d

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in P_C, you need to send to die.0 _+ F) K1 }/ G+ z: V
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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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/ N- u9 V8 J( K; T+ q
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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