本帖最后由 GJM 于 2009-12-5 21:43 编辑 ' e" S. Q- d! y0 S
# C& V+ \3 _; v7 R7 q( ?" Q- M H底下是小弟做AutoMOD里面PDF练习的(Exercise 5.9)逻辑文件但问题是,程序只Run到Machine A和Machine B就没继续下去6 T; i7 r& D/ H5 S5 A# p
/ V4 h, l4 W7 v2 y9 @/ `不知道是哪里出错,另外这题和Exercise7.1的题型类似,请问若要符合Exercise7.1的题意又该如何修改呢?请各位先进指导,谢谢!2 a9 S, M+ R ]% c' G6 i( ]
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& ?: Q9 n/ ?) w% P6 ~begin P_something arriving
* T8 S9 G( a0 c; s' W7 s move into Q_wait
1 k; ` l+ @# N$ U/ ~" I( N9 H move into nextof(Q_mA,Q_mB,Q_mC); o3 c5 P" P$ X2 b
use nextof(R_mA,R_mB,R_mC) for normal 48, 5 min" a& Y. i& Q% ]! z
send to nextof(P_mA_down,P_mB_down,P_mC_down,P_mA_clean,P_mB_clean,P_mC_clean)1 e9 ~6 t; {& R/ m }
send to die. D* b. T9 \ d, j/ B
end
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- y3 C' I7 C8 T7 r3 lbegin P_mA_down arriving8 k k/ }/ v9 Q% i
while 1=1 do & A: y' e+ n+ R
begin
. _$ Q8 G9 K. a% B wait for e 110 min
% n! J9 u9 t- R( _ take down R_mA
# [0 u# o- i7 K; Q' G3 H, v wait for e 5 min* G+ g/ h/ l! B( L. K
bring up R_mA
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end
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begin P_mB_down arriving
[7 a: X3 H' v while 1=1 do7 l0 ^1 g4 p9 L( j/ F
begin% c% A/ A. K8 y
wait for e 170 min
$ `/ c4 h( n$ p' `, O+ K8 l take down R_mB; E6 [6 n% C2 g2 X, c/ f, Y* }
wait for e 10 min
" b- i% M9 d# \( C( i bring up R_mB
: E3 ]: z- `! s+ u- i end N' J2 w2 {4 L( x4 q" W
end
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* U% h% H, a- q7 Ibegin P_mC_down arriving
" V( e' H" }8 H b: w while 1=1 do
: V7 E6 e. v/ j$ h0 w( M! S begin
3 J$ \) |/ Q9 C5 b wait for e 230 min3 N. F6 R0 i$ h3 a6 c+ ~! `
take down R_mC
9 r5 Z( [9 q' o; f wait for e 10 min: L3 s. l0 c& ]/ J! e
bring up R_mC3 L+ {6 K- Z3 h. y
end5 ?- Q% C( P8 I" m' ~6 _
end) X7 o9 H1 p g
5 c+ X6 {, L) ~0 Zbegin P_mA_clean arriving& o1 A0 U# a+ O. B, M
while 1=1 do
, G* [0 u6 f% k begin( K; ~& Q* P( h$ n( p3 r
wait for 90 min
; @# [* v* n! `9 N; W i take down R_mA O! b; s$ d; w# |
wait for 5 min. Y2 ?2 S# c! x- \$ L
bring up R_mA' a& Z. Z2 v$ B( m5 y
end
* M' B: s3 S$ b8 s5 aend( J" T, q9 |. X( Q3 q/ ~! t. J$ x
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begin P_mB_clean arriving" r9 f9 W+ H' Y8 x, B. r
while 1=1 do* L6 W2 r a$ ?5 _
begin
- L' ^$ H u( p, T) M, {. U wait for 90 min
: |' t$ r# @5 }6 G4 a take down R_mB
2 M5 \5 q! r0 T9 d; s- b6 N wait for 5 min( {; B. u" t3 }; u8 A) v! W
bring up R_mB3 x8 P1 a: ~% K4 Q
end
( [& P8 I( s" ^) aend. H7 |7 C, G$ v0 Q$ G
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begin P_mC_clean arriving
( l! \& w* c# v while 1=1 do
, P) l6 P/ T$ n! Q9 W0 b8 l begin. W$ ?. y8 L% U; R; H" \' O
wait for 90 min
! @ x6 j. X Y- z3 L take down R_mC
# b0 {* _0 l$ v- ]7 M$ k wait for 10 min
+ I, a2 D6 ?# y$ M8 k4 n7 ^ bring up R_mC# k9 {( m3 ^; j
end) g$ y& V: g2 h' E/ m. s( K" n
end
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5 J8 H, y$ [/ p2 SExercise 5.9
% @; r4 C. Z* H; h; p w, L- a& N/ n/ x t. F
2 i( j1 o4 q' Y2 xCreate a new model to simulate the following system:% |/ N+ h, _ v1 r# F
Loads are created with an interarrival time that is exponentially
3 t) r2 H1 T4 U6 s+ qdistributed with a mean of 20 minutes. Loads wait in an infinite-
. ?7 e+ E% B# L/ f, Zcapacity queue to be processed by one of three single-capacity,
; }6 A4 ^) k7 v; l5 b5 ]arrayed machines. Each machine has its own single-capacity queue
9 f6 M# \4 Q$ j$ S' m% fwhere loads are processed. Waiting loads move into one of the three 0 X7 S6 [* C0 H6 a6 ?& `
queues in round-robin order. Each machine has a normally % n2 M4 M9 K9 v$ W d, I, g
distributed processing time with a mean of 48 minutes and a standard
1 z# k0 B$ @( a0 m" Udeviation of 5 minutes.3 u$ C1 N! j+ H
The three machines were purchased at different times and have 2 L `, g9 `% _0 m& f5 W- G
different failure rates. The failure and repair times are exponentially
! Y6 M" R1 Z5 bdistributed with means as shown in the following table:
7 j. M6 z0 K \5 B8 J. tNote The solution for this assignment is required to complete
. g& \3 ^0 M3 L* `# D# Pexercise 7.1 (see “Exercise 7.1” on page263); be sure to save a copy of / k. g; l1 ^! W4 |) S
your model.
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% ^/ p5 B: ^5 o5 u; vMachineMean time to failMean time to repair/ w7 A; T0 R) F7 `8 y' R
A110 minutes 5 minutes
0 \6 A4 K. H) c6 h, U$ KB 170 minutes 10 minutes
' w+ W0 _7 r+ } O/ jC230 minutes 10 minutes
% V6 v0 f% P1 o/ g% q2 ?0 p
, i% N; c7 o: i* qThe machines also must be cleaned according to the following
( _, e. a" e# }" F: ^% A1 e. l; wschedule. All times are constant: 8 ~1 `* N) ]" z7 r
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MachineTime between cleanings Time to clean
9 b( d0 m: n* a h; p: }A90 minutes 5 minutes) ]3 \1 b- B! a$ q' E5 Q9 h5 b; X1 d0 k
B 90 minutes 5 minutes) Q) }) j' N1 I6 c, n; f2 }+ N9 V
C90 minutes 10 minutes
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, b1 n5 ]( [& j: D; P9 IPlace the graphics for the queues and the resources. % f! Y1 L( L5 Y' a! I+ a9 X4 x
Run the simulation for 100 days.9 e( V8 u! L+ o& L
Define all failure and cleaning times using logic (rather than resource ' S, \' i9 t, E! K% @0 U3 w
cycles). Answer the following questions:
\5 X& \# Y) w* ]a.What was the average number of loads in the waiting queue?! Q4 I( S; m9 h
b.What were the current and average number of loads in Space? 1 |- a Z+ A( q: p, P: h
How do you explain these values? % @ d* W! Z$ z3 c9 [- E7 s
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