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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,# C9 u5 q. D/ ]" f) j  ~
  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.
. Y6 }9 N, t+ l  Loads are processed by each operator for the following time:
- @8 D# }% d/ l4 A9 L2 ]  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.
; o7 p- y% {9 j% Q  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.
3 K. j% @: w5 r2 p7 U3 `  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.' Q4 @7 g* k# k# I3 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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8 n& c( p8 i/ ]9 @* P0 U8 U问题:
; h: j' k' M* d% {( O9 ^After running the model for 10,000 days, what was the average number of loads in each process?
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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( b& i5 j" b" z3 ~
move into Q_wait /*Capacity is infinte*/; M) y5 ^* Y) P8 D, R& `
move into Q_process /*Single capacity*/0 \% Z4 V5 ?  n

3 r+ A1 S) x* K4 z" c' Y9 d5 duse R_A for n 60,10 min /*Resource A*/
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send to P_B' \0 S. [/ H: `5 X" n3 ~' A
end
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/ z- m3 G# ]( j+ F8 t, d; a, w6 T* SP_B and P_C is similar
8 m( ^1 @  ]$ \triangular 30,60,90 min
2 D5 C  S( N) }9 K2 hu 60,30 min' [, l9 {# I( V/ ~% u4 V! `) W' y
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) B$ P: v: Q- I1 b- Z2 vin P_C, you need to send to die.1 x* m& T. `$ k: s& z* e- u7 a

$ h" ]- T9 @' n' k" RThen You need to add a L_Control to drive up the whole simulation. and a Run Control of 10000 days., j6 @( ~2 c* B( i) |, E
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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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