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( @! |6 V, e, v' T( m$ zThe current group of characters is interpreted as a name beginning with character other than a letter. The first character of a name must be a letter."
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: c6 i/ n. @8 H/ f程序如下:3 U% y2 z8 }2 U) o) _
MODEL 1
, T; V2 l2 f! m4 C3 g9 ECONST Tmax (VAL:500)
( _+ p2 z/ u/ r' AIm (VAL:30.e3)
: T- u3 H7 Y& S0 G# a$ Z4 |T1 (VAL:2.e-6) 2 R5 U# z! ?' X
T2 (VAL:50.e-6) 5 `0 {. g* Q3 c( a8 @
m (VAL:5)
5 K5 W# c- K+ B* ^$ [c (VAL:3.e8)
, ]7 K, R3 _: G/ |8 ^/ w3 c5 Xv (VAL:1.1e8)
' c4 d1 q: h# n5 S9 x1 ZIo (VAL:1) ! ~3 M& t/ f% }8 K1 {( c* e
z (VAL:6) % s' l# i6 q8 u2 d0 M! N$ P
INPUT UAP,UBP,UAN,UBN # o0 l m1 c9 d% z% u( D6 s6 n) z9 S
DATA Y,XA,XB * J! [3 @/ X* ~1 N! C0 n
OUTPUT UrAP,UrBP,UrAN,UrBN : r. D& ~) @7 G2 M. b$ ]
VAR UindA[0..1000],UindB[0..1000],dI[0..1000],
! t+ p' g( ^- C8 n8 BTr,Ti,I,e,dt,UrAP,UrBP,UrAN,UrBN,5 H2 T* ^. m2 ]5 N9 W
ta,tb,b,n,L,x,Ko,Ui,Tj( U6 @) z) Q7 I: V- M4 q
FUNCTION SQR(x):=x*x
- n1 ^" X% W- P* J1 O2 wFUNCTION F(x,tr):=(x+b*b*(c*tr-x))/sqrt(sqr(v*tr)+(1-b*b)*(x*x+y*y))
7 x3 V) _4 Z0 a& K) i; DFUNCTION U0(x,tr):=60*Io*z*b*(c*tr-x)/(y*y+sqr(b*(c*tr-x)))
2 L* r8 e, c" Q u' KHISTORY
. ?. ]; v7 O; z) k/ X% K ]( s0 qUrAP (dflt:0), UrBP (dflt:0)+ [2 u5 Q3 B" M/ J- \4 F
UrAN (dflt:0), UrBN (dflt:0); q1 Y& y, C l$ Y
UAP (dflt:0), UBP (dflt:0), s' W7 y5 J m2 i4 D! \
UAN (dflt:0), UBN (dflt:0)
4 g/ N- A8 U# W" K" P/ X+ hINIT8 U+ v+ g+ b( G3 k8 r; \2 s
dt:= timestep
" u" Q; t6 M! ?: W l6 w2 ], L. Nb:=v/c
4 X1 i( D' v9 B9 [! GL:=XA-XB
! y$ _) t& P( CFOR Tj:=1 TO 2 DO
5 d3 n; e: @9 q; U- }' Iif Tj=1 then6 v, }& K, z- [9 D' q ^' Z
x:=XA
8 w9 J) o' |. n D* @: welse
% d+ j6 W/ j0 y5 tx:=-XB
8 ]8 n: O4 `1 |3 ]6 z. Q l! Eend if# E- ^8 ^+ V; k5 y
ta:=sqrt(x*x+y*y)/c( v6 z+ s+ P( R) }
tb:=sqrt(sqr(x-L)+y*y)/c' n5 r% h0 C! B" S7 D
FOR Ti:=0 TO Tmax DO/ l: _( [- S4 u |/ [ V$ U
Tr:=Ti*dt2 e% Q0 ]$ ?+ l$ G2 R$ O V
if Tr>ta- n; K* H6 D8 C/ Y/ O5 F( g; R
then
+ }% T& J/ @! D+ J8 P$ i# W6 bif Tr>tb+L/c
8 M5 p' ^6 }& Q/ A6 N5 `) nthen, a: p- g6 w& t i1 y. J5 [
Ui:=U0(x,Tr)*(f(x,Tr)-f(x-L,Tr-L/c))! P1 ]) v, [, R- L
else$ C N/ |! L2 U4 X( S
Ui:=U0(x,Tr)*(f(x,Tr)+1)
* v( K7 {- o* Y3 Fend if/ M0 x6 k; z) C7 _" F
else+ l5 @# d' f5 s6 D/ q6 `
Ui:=02 i- c! V: o) o9 T6 h- {
end if" G$ H9 w# X6 `) D6 i) G& Z4 d9 B
if Tj=1 then
. |9 B, E" e- Q& R/ t+ _8 ^3 a$ j+ eUindA[Ti]:=Ui else" [" }- @+ Y- C3 [$ {" E
UindB[Ti]:=Ui9 C2 H( G* k" t2 H4 o' x8 M
endif' d. e; u3 H: @# u" [. e% G$ X
END FOR8 z; ?7 E! X) F5 A5 }, b
END FOR& J" Y5 d& J/ c, R) H' r
FOR Ti:=0 TO Tmax DO ; F1 u9 ~0 D( P
Tr:=Ti*dt
; j5 Q) q; I8 s/ c) i! zIF (Ti=0) THEN dI[0]:=0
* b6 R5 I$ P0 I4 \* ~# sELSE5 I; k8 x# c/ K9 i( J
e:=exp(-(T1/T2)*exp(ln(m*T2/T1)/m)). F! J7 o) P( Q% X
I:=Im/e*exp(m*ln(Tr/T1))/(exp(m*ln(Tr/T1))+1)*exp(-Tr/T2)
& i; G9 ?: k- M; Q: q1 HdI[Ti]:=I*((m/Tr)/(exp(m*ln(Tr/T1))+1)-1/T2)- g" B e1 r1 n3 v4 B# e9 J
END IF# Z% L; u0 l: Z" L! v
END FOR1 @' ~4 Y1 {8 m) i8 a
Ti:=Tmax
( ` N; h7 e4 M- {- cWHILE Ti>1 DO% p( g+ P+ C2 n) x! o
FOR Tr:=1 TO Ti-1 DO
2 F4 m U( T6 m* c* fUindA[Ti]:=UindA[Ti]+UindA[Tr]*dI[Ti-Tr]*dt
, ], I7 W( f \: t5 c! Y- nUindB[Ti]:=UindB[Ti]+# Q7 L3 w9 u0 k' i0 p. N
UindB[Tr]*dI[Ti-Tr]*dt0 z5 R+ l$ ^6 ?- S7 ]
ENDFOR
. a$ \+ Q* T4 P+ Y+ E2 s m" KTi:=Ti-19 q; Q, \: b# F2 H, [* |
END WHILE
' K. d3 u% C+ K6 P8 N7 Y; k) h0 \1 `& `5 P- f! b
Tr:=L/c
" i8 F4 i* l# Y$ U0 rEND INIT
- `5 @( I2 a% ?5 XEXEC
% Z5 h( o8 [ ~9 KUrAP:=UindA[t/dt]+2*delay(UBP,Tr-dt,1)-delay(UrBP,Tr,1) \4 U5 P8 V' }; b+ Y; r4 V
UrAN:=UindA[t/dt]+2*delay(UBN,Tr-dt,1)-delay(UrBN,Tr,1)
# h! x$ \% @8 \0 b6 lUrBP:=UindB[t/dt]+2*delay(UAP,Tr-dt,1)-delay(UrAP,Tr,1)( i# ^1 K. Y6 N+ q- @- z# w
UrBN:=UindB[t/dt]+2*delay(UAN,Tr-dt,1)-delay(UrAN,Tr,1)
, [5 m3 y- ]( B( X k8 CEND EXEC
, g! C2 L8 b8 D5 ]5 D- q# BEND MODEL
! H' D2 u* C+ S4 C( F }
/ h5 b7 @: r0 V9 B. C) E1 ^5 D& ?5 J0 t+ n3 s; h" b1 U- } t
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