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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,
( q3 p" k! l; l9 J& M* z* ]  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; Q! L" `0 ~4 I6 F$ @' @; C8 M2 }  Loads are processed by each operator for the following time:
# o* t/ P$ F9 T' Y  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.
5 N" S" l6 Z: y7 T  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.
  f) x; N4 ?, J5 |* `3 R  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.
/ I- f/ S( P. ^: R- dSend 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.
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9 S, s' j, ~1 G" H问题:
5 k0 J/ a) F2 zAfter running the model for 10,000 days, what was the average number of loads in each process?
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不胜感激!
发表于 2009-10-6 22:36:13 | 显示全部楼层
begin P_A arriving
: c4 J. @' _, Q" y7 C$ B' X& H/ v7 R9 wmove into Q_wait /*Capacity is infinte*/+ k3 d& |& d9 E: J7 F7 w/ V0 W
move into Q_process /*Single capacity*/( a* w2 s) i1 y; S
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use R_A for n 60,10 min /*Resource A*/' V- L* }' ]4 ]7 S& z

$ H% [& m5 R) Isend to P_B
2 d. m# _+ V6 b- e$ eend5 B# [& W  V/ j/ a. @
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P_B and P_C is similar/ ]! O1 z' L* [$ I- H6 j7 {
triangular 30,60,90 min$ r7 B1 u: Y7 `' O# ]; p
u 60,30 min
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1 b; v, u( r) W% {0 ]4 Fin P_C, you need to send to die.
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, [9 s5 ~; h4 ?' W, z% h; \& eThen You need to add a L_Control to drive up the whole simulation. and a Run Control of 10000 days.
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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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