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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,0 c1 T: D3 B9 {( x" Q
  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.9 q( ?8 |7 A$ @7 W$ g3 t8 Q
  Loads are processed by each operator for the following time:+ K& r! D6 Y4 Z7 X7 I( S# ]* S4 q
  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.
0 L- X+ h2 X$ F* G  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.( A5 U; E) M1 h
  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.
; h) L  Q3 b5 k9 X4 Y2 uSend 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.' f4 P/ `6 b: C1 p8 X/ m' _
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问题:
3 y$ ~) `5 C3 q, y/ T1 FAfter running the model for 10,000 days, what was the average number of loads in each process?
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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- B- Q7 P( ?, X' D' s. K
move into Q_wait /*Capacity is infinte*/
* `, ]6 k( z* g' A0 T5 Umove into Q_process /*Single capacity*/& j( a. a) y5 s- e8 V: v7 C

: p  y9 J6 H  z) |3 a( c8 ]use R_A for n 60,10 min /*Resource A*/7 H1 f& C# L3 X1 s, L! }
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send to P_B0 b$ @7 `2 x: \3 x+ h
end: ~1 a5 c1 [4 o7 e

7 }) F) x3 l3 y- z) ^) hP_B and P_C is similar. q; G4 `2 ~* {5 n7 f
triangular 30,60,90 min
, s+ V) i+ ^+ i( C0 |/ @- p: bu 60,30 min. L1 j% d3 _/ m. I$ x

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in P_C, you need to send to die.$ s% {4 e3 i& G

' j/ C5 M4 U% _% [3 C7 r  I. fThen You need to add a L_Control to drive up the whole simulation. and a Run Control of 10000 days.1 ^) Q$ x0 \6 p2 r
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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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