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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,
; X0 j. [. U+ C' B  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 N4 e2 E3 m' R+ K# q0 I  Loads are processed by each operator for the following time:
# e8 E' ]% `3 {  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.
+ Y9 @! B2 ^% r! o1 a; m6 [  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.6 U% w4 L" `8 u8 m8 N2 b
  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.
* C; E! b+ y! ^7 NSend 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.- l: O0 `; \# `+ {  w& l
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问题:3 c4 q9 l8 N& ?- n0 ]/ f+ S2 s" n
After running the model for 10,000 days, what was the average number of loads in each process?, @6 ?8 I* W. Z2 _

7 p1 O; V  B. W: \* C, d不胜感激!
发表于 2009-10-6 22:36:13 | 显示全部楼层
begin P_A arriving3 s" N' i$ D; z' `3 i1 e
move into Q_wait /*Capacity is infinte*/  V/ i5 d0 R6 O: i7 y3 i
move into Q_process /*Single capacity*/. k9 N+ E$ K& ]3 @6 Z
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use R_A for n 60,10 min /*Resource A*/' r5 f9 Z6 y: D# J. j! k

2 |' H( V# B8 psend to P_B
8 D0 t* }- w! W9 uend! ~$ o8 r1 T6 `1 Q
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P_B and P_C is similar
  f8 r! t/ C* |, [5 g; a, mtriangular 30,60,90 min( I0 i& H% |6 Y0 Z% C
u 60,30 min
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in P_C, you need to send to die.& L/ v, Q9 A4 Z/ m' u

9 i, a& s( e2 d* }4 KThen You need to add a L_Control to drive up the whole simulation. and a Run Control of 10000 days.- y- x# b9 U7 L; Z" N9 T
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/ i, [' y$ T% B- ]/ L9 ARemember 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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