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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,
. l' i1 J9 m1 g6 Q1 @  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.( ^/ m# C" b" H' S( X7 x" q& q
  Loads are processed by each operator for the following time:
( [: f/ i. L6 Y# x) O% ~  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.* f$ _, @, Q/ F! k
  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.
7 r, \, U% v1 h9 B  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.
' E. h" S, q( Z% n& HSend 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.* U# Y* m5 B# ?2 Z6 r$ F% N

! w" `. O' \7 ^; a问题:
+ O$ R" ~! Q# Q9 A7 jAfter running the model for 10,000 days, what was the average number of loads in each process?# @2 D" u8 \: c4 }) j

! r; C0 _" P0 E# O/ p" u3 e# N( V( j( ?不胜感激!
发表于 2009-10-6 22:36:13 | 显示全部楼层
begin P_A arriving! H8 l3 n! G: d/ _* }- c% F4 q
move into Q_wait /*Capacity is infinte*/- B0 O# U+ w- E- `8 G: {
move into Q_process /*Single capacity*/
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1 Y, R7 k) K0 G9 R3 R: guse R_A for n 60,10 min /*Resource A*/
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/ I; e' n) {. C' h# ]/ I1 asend to P_B( F4 Y' Q$ x+ _
end
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P_B and P_C is similar7 @! h/ h9 [- r: \3 j/ `
triangular 30,60,90 min
8 d. @0 |* y6 N/ s3 c* g& K0 iu 60,30 min6 c4 [. p5 p* n1 E. w' W

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. i1 P( ^: L' Lin P_C, you need to send to die.! }" p! n1 E/ S) k
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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.# r* l" l- x. H
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+ I9 `( S6 x  C3 C6 A& M4 Y  H% b7 `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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