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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,/ I1 l# T: \: ^  D
  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.
& b; x0 R+ I7 _7 N+ `" t  Loads are processed by each operator for the following time:$ h" t# b( p+ t( q; [& ]
  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.% U3 w  ?! r$ g0 a( K; R+ 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.
9 c3 o% d3 t* W  Z4 j  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.
; s& ~; H8 r; N& 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.# O* |1 ]9 d, V2 b

) _/ r7 l: P5 W- I问题:
6 `; x5 o, y7 F  D9 mAfter running the model for 10,000 days, what was the average number of loads in each process?! j3 E4 |( G) J/ Y: P

& a; |+ ?% H4 _( Z不胜感激!
发表于 2009-10-6 22:36:13 | 显示全部楼层
begin P_A arriving
9 {9 S4 U8 {7 x! w/ @5 B* C# Kmove into Q_wait /*Capacity is infinte*/
# M! n; V  U. u! l: j( p2 T1 l) vmove into Q_process /*Single capacity*/
* h0 ^) `! \7 ~3 G, n$ x9 ^4 K, h) f# \5 \0 f2 M' Y* V5 G
use R_A for n 60,10 min /*Resource A*/; }1 z3 C9 g7 Z. H( N5 L+ N

# F# z6 |0 Y7 z, f7 R! l1 R$ \* N0 Wsend to P_B
9 _' W! h+ h' o! b  K5 T+ nend8 a% Q! ~+ ]4 K. ^/ X
; I# p  h; s# Q, U# K
P_B and P_C is similar" o1 o4 @7 Y2 z' p. _! c
triangular 30,60,90 min
7 B& o4 t) h: v% xu 60,30 min
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8 X" @* r+ O4 ?
4 T- C+ `- R7 b* Z' sin P_C, you need to send to die.+ t9 [3 W7 [0 D5 ~5 `! O- @

" ^0 L1 n2 S! q  MThen You need to add a L_Control to drive up the whole simulation. and a Run Control of 10000 days.8 |" w' h1 f2 z' k( |+ E& C) N
0 y+ F1 Y% \! J1 Q
2 O3 N, M- p" g7 [: ?9 n+ C7 E
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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