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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,9 E7 a' E% n6 x6 i& |
  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.+ t+ [) h- K8 H2 C2 q4 x
  Loads are processed by each operator for the following time:3 ]1 ]' N3 z! w. T, j" a
  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.
. A* X: c( ~: x0 b+ e2 @/ Y. x* A5 I  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.& H: o4 N- I" q- s0 o
  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.
" L- B! }7 J3 E/ x3 oSend 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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( l3 r1 f# z1 z8 K( ^* K问题:/ W4 `1 I* q5 Z& s
After running the model for 10,000 days, what was the average number of loads in each process?# _. J& l, F4 ?# Z5 n
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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
: u/ c/ a0 ]6 D1 H/ m+ Z: e2 Wmove into Q_wait /*Capacity is infinte*/
1 N  f% F- b" a( D5 i1 R, E2 g+ w. Qmove into Q_process /*Single capacity*/
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8 o* }) t. {9 P* xuse R_A for n 60,10 min /*Resource A*/; ?3 a! ~( U( }, v. h  Q: F/ y/ V

: {/ l3 Z' ^6 ~4 }send to P_B
& m) ]: H" ?) S* \5 J2 x9 Lend3 C' P2 i9 y' u2 c+ @5 s" q

% O; w0 e& l: KP_B and P_C is similar
5 Z' e4 |9 q6 ^  a! utriangular 30,60,90 min
) I2 y! Q/ N2 a" ?8 E0 M  k: A. E! ^u 60,30 min
: E4 f/ {$ a" W+ k5 ?0 i) M) A6 E: p  [1 b% E

) g6 ?5 j1 l8 f: B7 _1 M" Cin P_C, you need to send to die.2 H, p# Z" j  B! D' H# K) B

5 z5 c( _7 U) P$ Y, H9 z' F, sThen You need to add a L_Control to drive up the whole simulation. and a Run Control of 10000 days.) W. y4 L4 e- J2 U
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+ F/ G- k5 u- ?# k2 f: F; x; [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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