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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,
7 `- E* l$ t7 C6 ?6 F8 u  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' P8 I) T+ d+ Y/ m$ e/ U4 {  Loads are processed by each operator for the following time:
2 Z% K. f/ Y7 [% i: E2 s- D  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.
  o" t5 @. ^) f1 I# V2 ^  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.
; E8 l/ J% r: @2 N8 J; ?7 q: [+ k  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.5 Q* b2 C" p4 `. r
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.! _3 O" D" W4 i: d

2 |6 X) m/ y: R2 @% u6 K6 i问题:9 ^  V, {# ]) ]9 Y0 S! z% W3 n
After running the model for 10,000 days, what was the average number of loads in each process?# @: }4 u! \; T/ f- u5 n' S- r: q
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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 arriving5 F! N3 l! K$ F. I/ z$ C: @5 {5 d
move into Q_wait /*Capacity is infinte*/
+ e3 k0 ?6 p9 W# \move into Q_process /*Single capacity*/
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use R_A for n 60,10 min /*Resource A*/
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send to P_B
. b0 r& O1 u% N, zend
  z. }! e3 w; p2 I, g- D; b* \9 J1 m3 m. @$ V& `' Q# k- B  r
P_B and P_C is similar8 C- j+ O& ]5 Y- u, P* Z$ c2 g# H
triangular 30,60,90 min* k( v0 N5 W) X: e; v
u 60,30 min
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in P_C, you need to send to die.
5 J: d- w- D5 {% c) @2 B
% `- w' S$ O3 \+ l, X4 OThen You need to add a L_Control to drive up the whole simulation. and a Run Control of 10000 days.
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5 R2 ]6 e1 R0 }- }  W3 H% 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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