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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 T6 S4 Z- }6 Z" U/ b
  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.
* K, t% S% _! }( k# T7 D; j+ L; F; g  Loads are processed by each operator for the following time:( t, ~/ T6 T( B. U; q9 z( |
  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.
, j7 a$ g  c4 ?; G9 B8 b2 `5 d  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.
6 P" Z: b, K* j1 J2 ?( \7 x4 W  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.
! {6 q$ z% N0 r2 z, S5 ]1 CSend 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.7 P, ~) l; P9 U. w; @. F

0 Y! }) [; v8 e* S: K问题:
2 K  E: e) H+ v# uAfter running the model for 10,000 days, what was the average number of loads in each process?( |4 L. m1 Z8 o3 Z

3 H9 e4 P: |/ B, \& ^不胜感激!
发表于 2009-10-6 22:36:13 | 显示全部楼层
begin P_A arriving" b$ Y$ Y: I. V" s3 C0 Y! ^4 t
move into Q_wait /*Capacity is infinte*/
6 j. F- ~4 X5 z( r1 F7 C3 Q/ \move into Q_process /*Single capacity*/9 X; i( w. i( o

9 @) k: ~& F6 T) \2 c% Y7 Ouse R_A for n 60,10 min /*Resource A*/
2 D4 z7 L1 G+ L" P' o" ?$ d& O% m* {
send to P_B% p1 h* H$ a* A" u
end
3 P7 S/ N. ^- C% e
3 g3 k7 U- h6 q5 lP_B and P_C is similar! m7 s" L. K9 z3 u9 F) ~( a% @
triangular 30,60,90 min: `: i2 L+ d* R1 R4 d5 a0 c7 ]
u 60,30 min
7 _2 K2 ~8 ^9 m0 b7 i5 P  `  i, W' D& n$ F7 q( j( ~3 ?! J

" z  ~7 f2 |  C0 A6 @7 pin P_C, you need to send to die.- _5 d: `2 k% i! g  b

5 b2 @% S* H8 w9 S4 o7 BThen You need to add a L_Control to drive up the whole simulation. and a Run Control of 10000 days.
, {. |3 e1 ^7 c& L5 k) Q0 H: V$ Y9 ~1 o9 h$ T6 f
+ d9 J+ V+ u* O2 P' D2 v
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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