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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,( P  |3 o" ^" I  K6 w& g3 E8 m
  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.
0 Q# o( t) P6 W  {$ K' S; M' c  Loads are processed by each operator for the following time:; b' P6 S- g* p0 r- s$ D" }4 g
  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.8 p; P& |( B0 E  K1 P( r4 [, `& m
  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 ^* D8 O" k* W% f5 ^
  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.
7 m( T/ W8 O( Z, FSend 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.$ @+ k# f! \; _4 i. x: O2 A# U

* q" h* d6 @$ U1 g问题:
( ?' y) A, \+ d! @$ O$ G4 P9 b; m# yAfter running the model for 10,000 days, what was the average number of loads in each process?7 w- m$ r5 R; P( _' T3 I( l

5 U' e6 ~0 P$ U) V/ w8 M3 G% j不胜感激!
发表于 2009-10-6 22:36:13 | 显示全部楼层
begin P_A arriving) w* z1 `: Q5 @9 H6 i; F$ H% ]4 b3 C
move into Q_wait /*Capacity is infinte*/5 k' X( u/ j% l/ }) B
move into Q_process /*Single capacity*/: D! y6 \) t! b7 }2 i* a- s

9 k; y& c2 X+ S1 P. Quse R_A for n 60,10 min /*Resource A*/+ X1 M6 M" s' V1 g5 g
' h; K3 f; G  Q: r
send to P_B$ n) V' k& R/ ?* \
end7 m: d7 d6 V% l9 @) b
6 _: k% Z4 R  ?7 j6 j& B' t: D# j
P_B and P_C is similar9 e7 `" T' o7 D! J5 R
triangular 30,60,90 min
) ^; u  o1 S' Z! H# Mu 60,30 min6 B5 W5 ?0 Q* u. W# u

! b: |2 N- e+ P( W1 }( ]7 _9 ?: [2 B# h) q# R% Y2 m' w/ N4 e" m
in P_C, you need to send to die.
. z% W* p" J/ V! t# {  y; E* N! ]
Then You need to add a L_Control to drive up the whole simulation. and a Run Control of 10000 days.5 W* @- W( f7 V. e& Q' s: @
# ?+ K8 _% u1 ?  R7 B

7 z9 h' H- O! x  eRemember 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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