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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 T2 ]  A0 M# N6 a& r
  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.6 Y  O. Z7 B) `* ~5 R
  Loads are processed by each operator for the following time:
/ F. V2 A% o$ b3 k* c  ^! b( \- z  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.
& i( l$ L* v- g+ G) r3 R5 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.* @* P% M6 G- P+ V! T8 ]$ O# T* O1 L
  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.
# H2 P% n' c% PSend 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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: |+ }# c; `$ t+ B: f0 `问题:
, K/ J+ c* i9 e- l/ x1 dAfter 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" d1 w5 z0 B2 D, Q( I
move into Q_wait /*Capacity is infinte*/7 y8 W& [$ W1 `3 C$ N2 ^1 G
move into Q_process /*Single capacity*/" ?( b* \. }# n6 e6 ]7 y. M1 y0 a
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use R_A for n 60,10 min /*Resource A*/
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send to P_B; x$ ]2 h( S/ B/ p4 q
end
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P_B and P_C is similar
; G: x6 L. N% g6 Dtriangular 30,60,90 min5 S, n% B. e/ O/ {$ l% I
u 60,30 min
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* T: d- ~9 l$ m/ F6 l/ H5 i1 Tin P_C, you need to send to die.
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& k: o6 O( Z/ V4 m* g5 }" uThen You need to add a L_Control to drive up the whole simulation. and a Run Control of 10000 days." k; \, q. m' c- {2 A
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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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