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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," P9 k+ b& V6 h
  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.. {1 v# w( x9 P; _
  Loads are processed by each operator for the following time:
8 B6 H# R7 M; I& X. D9 x  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.
; ]9 P) u/ S  i  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.8 u2 B: G; H9 j6 u9 G
  Worker_C does the job in a uniformly distributed time between 30 and 90 mins." [- B6 T) T, _
Send 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.& O8 l0 h9 |7 G
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问题:
( g- Z) n! ~9 {/ w8 C4 nAfter running the model for 10,000 days, what was the average number of loads in each process?& h5 f( L1 p5 e( @" T9 I. h. v

" s$ R' V  d# W0 L不胜感激!
发表于 2009-10-6 22:36:13 | 显示全部楼层
begin P_A arriving, j4 U( b7 V! ^/ @7 C
move into Q_wait /*Capacity is infinte*/9 E+ P$ h6 Y8 A1 t
move into Q_process /*Single capacity*/- h, Y* S3 c- E
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use R_A for n 60,10 min /*Resource A*/
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( i( H+ Y6 \& r* t1 Esend to P_B
* Y" S& \( W0 w: f# ?end
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/ `1 F0 c1 D+ i( TP_B and P_C is similar
5 h, P# A9 T$ `- I0 u9 S) W& ctriangular 30,60,90 min7 R' I: Y* Q* C
u 60,30 min2 j, Z& |- P  Z6 ~, Q+ [* c$ {% W
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in P_C, you need to send to die.6 Y! h$ t) V8 W  M8 U( K% m

6 P! L; Y$ W2 ~/ U& c: b  TThen You need to add a L_Control to drive up the whole simulation. and a Run Control of 10000 days.
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: V! C$ Z1 _4 n/ O3 xRemember 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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