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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,
! @; j9 @0 l" M; c  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.
3 E' ~4 x0 O: E/ y* l  Loads are processed by each operator for the following time:
2 q9 U3 e% n1 N( ^  O  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.. R% X) K6 ?. C& A
  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 p' s# e+ d  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.
" R1 Q8 a, X) e) U; l$ BSend 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.. v- D: H8 Y0 f3 }. a6 k

' s0 G6 K. j$ t5 Y, X- O问题:% i  H9 d3 r3 E5 d# y
After running the model for 10,000 days, what was the average number of loads in each process?( [! l) P" n, ]' p

# ~+ \! e9 h$ M1 G+ i9 b' C; Q5 P. v3 y不胜感激!
发表于 2009-10-6 22:36:13 | 显示全部楼层
begin P_A arriving
9 S4 v/ E: q* }+ O$ x* M3 ^move into Q_wait /*Capacity is infinte*/
( Y' b8 S% l7 M! a% B. p, }1 N3 l3 Pmove into Q_process /*Single capacity*/( _) P7 i& [* ]. N4 T
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use R_A for n 60,10 min /*Resource A*/
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send to P_B
1 X0 q$ u" E* [2 W2 hend
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/ `$ f1 j2 ?/ w9 PP_B and P_C is similar
+ _. x& O9 `0 G+ ~0 Btriangular 30,60,90 min
, j, X. Z0 c) H- s, wu 60,30 min
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in P_C, you need to send to die.5 p$ K4 G6 F; i$ d5 p, R

( l0 G' j0 e) X3 U; M5 Q$ qThen You need to add a L_Control to drive up the whole simulation. and a Run Control of 10000 days.
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0 z5 M. a; i  M
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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