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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,& \8 P; p& r* l. p- l$ 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.
! U# O& _, t$ q  Loads are processed by each operator for the following time:
2 @3 D( c- H! Z9 |2 R' u  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.! U8 s8 I& `2 n9 P
  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.
2 S) J, l/ F! j1 p+ K1 {  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.- [+ `' s# j) l8 z* g
Send 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.3 P7 {) ^4 v: G; s# w+ I
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问题:; J; y5 Z8 E% z) M2 i
After running the model for 10,000 days, what was the average number of loads in each process?0 i% {3 {8 V% E( ?/ Q' g) ]9 \

  O: ~2 R8 w# D2 p& k不胜感激!
发表于 2009-10-6 22:36:13 | 显示全部楼层
begin P_A arriving
7 P* X; p. ]# y4 K+ l; B- B$ a( lmove into Q_wait /*Capacity is infinte*/
  E0 Z  k9 C9 N2 G* umove into Q_process /*Single capacity*/2 s& r- K* g5 H9 R. M5 d

5 Y, d& ?) H) [use R_A for n 60,10 min /*Resource A*/+ P: j% k' y! C/ s1 }

/ K6 G  w  C6 l+ T6 M6 w. b' T' `send to P_B# K3 O; ]/ I$ @3 V8 [
end
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+ J; Y& V9 D0 h+ R3 w& tP_B and P_C is similar
: N  }  X+ P& C2 y  v% @triangular 30,60,90 min! T" u1 d, V- D3 c' a
u 60,30 min& d9 _! r. L, a4 X

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in P_C, you need to send to die.
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8 }2 [2 w5 H" AThen You need to add a L_Control to drive up the whole simulation. and a Run Control of 10000 days.# `3 E% n$ o4 P* S" \2 m/ ?
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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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