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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,
7 b# Q; J6 C) L8 D5 y  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.# ]$ c0 I) Y2 M% L( k! n( |- r
  Loads are processed by each operator for the following time:
: G2 h; |  ^: q: H  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.
4 f5 E$ ]. g2 ~1 {; H  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.+ L0 a# B% n: j8 E+ Z( m
  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.
" W8 E  i8 B* q, |7 \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.3 m7 h2 L) N9 O: }

; e1 {; H& }5 t9 H# o" U问题:1 C. J+ h$ m$ c
After running the model for 10,000 days, what was the average number of loads in each process?
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6 B1 s  ~: s* z$ R9 G- r8 z不胜感激!
发表于 2009-10-6 22:36:13 | 显示全部楼层
begin P_A arriving& B/ A" N3 C) F' a- w
move into Q_wait /*Capacity is infinte*/& D" t) ^3 ^$ c, A) ^2 J5 E# ?
move into Q_process /*Single capacity*/- B' I9 I9 F4 T0 u5 R% @8 _5 |

% ?. B6 O6 |3 }4 w4 suse R_A for n 60,10 min /*Resource A*/5 }& D) _5 L/ a0 G9 F4 M$ U

# q3 z3 |$ f* x" G# ~) |send to P_B  o: D; ]2 d. u! u$ G6 T8 ^
end
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7 f& ^) N' j" ]7 D( Z3 e- }$ R1 cP_B and P_C is similar
% E% p$ M  P- W  k" s# btriangular 30,60,90 min; f* v8 q# b( A
u 60,30 min
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9 p3 p, z' F! N0 i0 z1 G+ E, {in P_C, you need to send to die.
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Then You need to add a L_Control to drive up the whole simulation. and a Run Control of 10000 days.+ c( |/ {- X1 q
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) w2 V4 Z2 `3 b3 T+ S' a/ W- ARemember 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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