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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,/ _4 d" d1 X- j/ b/ X: g
  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.( N: [7 H" S3 ^5 w$ U- L% D3 h0 h
  Loads are processed by each operator for the following time:
# F+ I) W2 O" p, J' ?+ F. {0 ^  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.
! L% f; b! Y8 m$ f$ E+ W1 v  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.
  g  w  P6 l  H# B% b' S+ q0 h  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.7 W, h, _2 D: |! S' a
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.
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问题:
( N* }) u: l: a- b, a6 qAfter running the model for 10,000 days, what was the average number of loads in each process?6 u: T2 N( P: r) q, r( M

2 r2 E8 ]1 ?3 M& f2 L7 y不胜感激!
发表于 2009-10-6 22:36:13 | 显示全部楼层
begin P_A arriving
( F1 u+ Q* A3 @5 R  Pmove into Q_wait /*Capacity is infinte*/
; M( p' ?# O% {( d7 z4 r- j7 y* K8 K  g  Smove into Q_process /*Single capacity*/
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use R_A for n 60,10 min /*Resource A*/# Y: O1 U3 _4 q* s1 Z+ J% @0 ~7 p

/ A- x0 |% |: \- J. g* C+ Psend to P_B" ?4 y2 U  p- T3 h  B6 o' {
end
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, R7 K+ c, y/ _" x  S; LP_B and P_C is similar
) F9 f! n4 s5 @& ]: o3 ztriangular 30,60,90 min$ A) s( k3 e4 m, q* j
u 60,30 min; b/ n* H) k6 \% j$ H# J! S

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in P_C, you need to send to die.0 u# E4 D+ W; O
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Then You need to add a L_Control to drive up the whole simulation. and a Run Control of 10000 days.
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1 D  o1 X  Q% d) P3 U$ m& bRemember 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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