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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 B6 O( g) v: w/ A1 O4 R3 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.
* u0 U. \) S! T- _; V( t+ [  Loads are processed by each operator for the following time:
& r% p8 S+ n- ^8 J3 U9 S5 ^* o  Worker_A does the job in a normally distributed time with a mean of 60 mins and a standard dev of 10 mins.; o* V0 y( O& w: y0 z
  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.
) n; Q, X  j; w! f; k; t6 ?  Worker_C does the job in a uniformly distributed time between 30 and 90 mins.
4 N$ f" T+ h4 ]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.# v- S  u5 M5 U6 A1 n

! d" o6 v- D) Y1 d; F2 M问题:
3 l3 J" d& W2 |2 B/ {! xAfter running the model for 10,000 days, what was the average number of loads in each process?
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* n5 V* @# H; z" a7 L; N) l& a不胜感激!
发表于 2009-10-6 22:36:13 | 显示全部楼层
begin P_A arriving- T, u; R$ f  d
move into Q_wait /*Capacity is infinte*/
; C# ^* u( s- c0 [7 b) jmove into Q_process /*Single capacity*/! V7 b: M* `. t* {7 E' M+ z2 H" D

7 z1 F1 d. r% p; g8 _& @) j* \use R_A for n 60,10 min /*Resource A*/. l6 g5 ^4 K  a; H1 G- C$ p) i0 n
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send to P_B
8 b2 d" o7 c* @& `: {/ {end
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P_B and P_C is similar, E8 X& ?8 u0 X4 R7 D
triangular 30,60,90 min
0 D' b. U; n7 I6 s# ?1 P  d9 V5 l7 Pu 60,30 min( k6 v. P2 c: h  ~/ d. [- u

8 g$ X/ `3 D5 y' V& x$ ^+ v$ d) g- h- U) {% ?' z, o7 e
in P_C, you need to send to die.$ ?# `: H- c/ _* v+ Q& M

/ B, f( A5 Q* A& g: G; MThen You need to add a L_Control to drive up the whole simulation. and a Run Control of 10000 days.* b8 F9 t; K; A

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" r; _$ I/ M' z0 V2 ?7 s7 {- A5 f. GRemember 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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