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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,
: ?* \6 a" {9 q- t5 ~6 Z- B  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.& t6 x; F% E1 a# W/ i% I$ S. H
  Loads are processed by each operator for the following time:! l. \2 `0 C4 ^$ j) p- g; l
  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.
- }( W" F/ b( @: ~3 ^4 r+ e8 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.
, w5 B, \1 A$ f+ H3 F; S  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.
5 q9 d( e+ G- M: k0 YSend 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.  x* Z! `+ C" f5 _; c3 z* j, W

6 B4 T2 z  M+ `: C问题:
, @( U9 Y( E$ \2 D; f: r) tAfter running the model for 10,000 days, what was the average number of loads in each process?
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- V1 D& r& q& t$ R不胜感激!
发表于 2009-10-6 22:36:13 | 显示全部楼层
begin P_A arriving$ w0 q& }2 v/ l, Z7 [5 o
move into Q_wait /*Capacity is infinte*/! ?' x; X* {; l) c0 n3 S
move into Q_process /*Single capacity*/
# v( o+ g! B& o, w! g1 [
8 a; Q# I+ K1 l& M5 o. euse R_A for n 60,10 min /*Resource A*/
  Y3 ~6 _- |5 @3 s0 J0 p$ l) C5 a, [7 e/ h1 j
send to P_B
+ S/ ]" W8 l. w! t/ D. Fend! H$ A+ W9 e# v# Q% p. v1 H" g# r

, q3 G2 p$ j7 c$ IP_B and P_C is similar% J0 O) B$ p6 Y8 q/ ~4 ^* S9 B
triangular 30,60,90 min8 A3 |8 I% z, G  e6 I9 q
u 60,30 min' }3 y1 |/ c1 X$ n6 p
; s2 m8 ?  \( y# x

" B" c4 O9 I; Fin P_C, you need to send to die.7 n. z0 Y3 P. u- |+ I- T3 I4 q
  `3 h5 F9 f' h7 \3 x
Then You need to add a L_Control to drive up the whole simulation. and a Run Control of 10000 days., S0 @" x2 B( J' N

) p2 j! C) P' z  I! f/ ]  w9 k" Q& V' I. K  O
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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