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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,  g) V* G& V! X$ d4 j0 H8 f
  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.
( D, L+ J& {0 }/ Y& H  Loads are processed by each operator for the following time:+ x/ z2 v/ s" K* p% h. `6 y
  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.# ^: c+ o% m8 f6 \
  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." K5 A! W, F5 V' }7 b( w( \; Z' R# r
  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.
& }# y3 |9 r8 ~5 D  k2 [+ h3 L0 u! VSend 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.0 t% w1 x3 \* T$ \! T
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问题:9 g* p8 x( E% X: ]4 s; m
After running the model for 10,000 days, what was the average number of loads in each process?( P6 n/ |0 i# T0 @% J: o
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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- }$ w  M1 p" M( H9 T1 `/ C+ c2 c
move into Q_wait /*Capacity is infinte*/
0 X  v9 R/ G- \: ~" w. U1 \" umove into Q_process /*Single capacity*/# X) L0 a- W! y. r7 O

2 g' N$ v0 A& @3 b0 ruse R_A for n 60,10 min /*Resource A*/7 v! H( p$ Q; U/ g' ~  m& ?

1 v& G. M; t% D9 u% a( V+ asend to P_B
6 T* g  c, B0 a7 T9 }end
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" x) m6 B$ O: S' R( G# lP_B and P_C is similar8 b8 a- W. u3 W  `4 q) D% N
triangular 30,60,90 min+ C& X+ t, q" A
u 60,30 min
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in P_C, you need to send to die.* W  b, z0 x) W+ e; G0 u+ Q

' M6 P. Q6 r" w# W1 nThen You need to add a L_Control to drive up the whole simulation. and a Run Control of 10000 days.
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6 |5 X6 z4 U& D5 k6 A, ZRemember 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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