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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 @3 o- ~! ]$ Q' i' \. ~( i/ t0 P
  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.
; M7 }- ~7 p' n2 m7 O& m  Loads are processed by each operator for the following time:- s4 t+ Y0 U( ]$ {( E1 @0 z
  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.
# L) d. i4 H% ^: 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.6 Z% k2 t; R  a0 K4 a
  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.
- u$ T! y- k8 p$ c0 K4 q" h1 PSend 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. _2 t$ B2 u! R4 o# n/ \8 d- b

+ g' W6 {4 j* Q. f0 m3 {" S问题:
" b8 i+ `- z/ }; n3 mAfter running the model for 10,000 days, what was the average number of loads in each process?* Q0 @7 m& P1 N) Z2 n* B

/ o- Z6 Z) J8 h$ o3 P; v不胜感激!
发表于 2009-10-6 22:36:13 | 显示全部楼层
begin P_A arriving
6 w+ p6 F# t8 e0 a7 J) Vmove into Q_wait /*Capacity is infinte*/: ]! v, q6 Z9 S/ C9 D
move into Q_process /*Single capacity*/' R8 q; Z7 D: U3 b% ]# h+ B# {. n
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use R_A for n 60,10 min /*Resource A*/
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send to P_B
0 z  T; ^$ L# e' o7 I8 ~; bend
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6 ]9 e) c' B% b: y- N9 KP_B and P_C is similar* B% Z6 i: `- c  Z/ U% ~) Q
triangular 30,60,90 min
. G# n/ A) A& h( [0 N$ Nu 60,30 min
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# ^8 l  h  c$ X# i4 sin P_C, you need to send to die.
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+ h. W( v* \6 U: K, iThen You need to add a L_Control to drive up the whole simulation. and a Run Control of 10000 days.3 t) D7 L, z& G% Z- F
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( U. [4 s2 T  FRemember 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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