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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,
6 _# |& n4 }3 e1 d7 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.) l$ N) q" s. b+ A+ M
  Loads are processed by each operator for the following time:+ k( K5 J+ w3 D3 q5 b6 K
  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.
/ [9 l% K) J" y0 t% O9 I# K+ s  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.  c. y, l# v- w5 a
  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.- L7 I- J1 w/ q# V( G/ o& p4 k
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.0 e2 i/ B! W2 p1 T
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问题:3 K5 w5 j- S- T7 @, q
After running the model for 10,000 days, what was the average number of loads in each process?: ]. x/ x$ c; z( B: e1 P3 B* V
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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, e, ~3 a; ?; x
move into Q_wait /*Capacity is infinte*/
* N  i8 M& `' ^- U; r- h6 Omove into Q_process /*Single capacity*/
/ _; [( i, ?8 {- O1 J& d" c% H( `9 ^+ u- ?8 w
use R_A for n 60,10 min /*Resource A*/9 G# f7 m/ v5 v  A0 M
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send to P_B
0 H& J9 ]  X8 _5 d% ?% h2 G" _) Jend" ?5 W0 r$ b' E5 ^9 W* Z

' a- G. c2 y. `9 S& cP_B and P_C is similar
! f6 k; I, K. p& c7 m6 J% wtriangular 30,60,90 min
4 ]7 w* ~( S! g1 X6 i$ Cu 60,30 min( }6 ]; y+ H6 O$ Y" K) |. g

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6 ~- c9 f' x( [in P_C, you need to send to die.
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# }7 c: s; E) `5 kThen You need to add a L_Control to drive up the whole simulation. and a Run Control of 10000 days.0 W8 y1 y# F, n: }9 K  u2 T

2 u% c' `: E4 f. ]$ }- P' ]9 d& l: Z/ }
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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