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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 B) A8 o- A( w7 s0 Z
  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 O* E$ s: o$ N: p$ t6 [
  Loads are processed by each operator for the following time:
7 m# C* t0 n: P) S+ `  G+ k$ L  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.
+ q+ f3 M. F* ~  ?3 h! 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.
/ i. \, Z  K; U- @( V4 {  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.
, \5 t8 y( w5 X1 g7 l% s! ~* GSend 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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! |) \$ a* _. I0 f+ K, V, |7 r问题:
* R7 B. u  @/ YAfter running the model for 10,000 days, what was the average number of loads in each process?
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发表于 2009-10-6 22:36:13 | 显示全部楼层
begin P_A arriving. l4 R9 J7 @( b* L" g* r
move into Q_wait /*Capacity is infinte*/
4 ^! \& `- ]2 _1 j$ m/ R9 Emove into Q_process /*Single capacity*/# c: @6 e' ~3 M1 p: E( G

, w% m' k! h6 puse R_A for n 60,10 min /*Resource A*/5 [- R  ~# `* g* f6 t/ v

( K! B& ?- c2 Q; I5 ysend to P_B% K# _+ O9 p. T: E2 j2 z' t( g
end
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P_B and P_C is similar5 ^4 M6 {3 M) Q* t$ b* n0 w
triangular 30,60,90 min$ |& {8 c; D- j; e2 Z( t: @  T
u 60,30 min
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in P_C, you need to send to die.1 Q/ i; X0 u. e8 o3 N* N

! [* s0 K3 n+ q" c' P/ F1 WThen You need to add a L_Control to drive up the whole simulation. and a Run Control of 10000 days.
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: `' ^# k8 `' R# ?5 jRemember 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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