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The 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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程序如下:6 Q L9 ?- W# r' @1 d
MODEL 15 e/ p# v5 O; N6 _! J3 k' _* P
CONST Tmax (VAL:500)
- Y7 U* j" y' ?6 K* X9 x5 o1 ~Im (VAL:30.e3) % N- B! m5 h6 X2 ^, p5 ^
T1 (VAL:2.e-6)
2 o* o" @- k2 s0 F$ jT2 (VAL:50.e-6) 4 _8 |1 ]3 J# f+ k' O J. x z
m (VAL:5) , Y, g1 s. b7 n: y, X: b& D& ?. E
c (VAL:3.e8)
6 T! ^/ A3 n# K7 U. {% g/ pv (VAL:1.1e8)
- D2 O; ]5 S K9 l, ~+ ]2 wIo (VAL:1) / h) }' w) F8 f9 n5 a; Q
z (VAL:6) % t: j% J# G* }3 B
INPUT UAP,UBP,UAN,UBN
5 w! w/ [% n% f) _! y# H4 x6 H+ \DATA Y,XA,XB
. ^ t, \$ |) _( p: A7 mOUTPUT UrAP,UrBP,UrAN,UrBN 1 j, b1 [# j6 a& i& c( f
VAR UindA[0..1000],UindB[0..1000],dI[0..1000],
) l9 z; C. M1 C e5 eTr,Ti,I,e,dt,UrAP,UrBP,UrAN,UrBN,0 x! H) J+ ]0 d6 U& J6 B6 l
ta,tb,b,n,L,x,Ko,Ui,Tj
* k7 T4 ~; R$ vFUNCTION SQR(x):=x*x
- H$ k4 s, Y+ bFUNCTION F(x,tr):=(x+b*b*(c*tr-x))/sqrt(sqr(v*tr)+(1-b*b)*(x*x+y*y))' o; O- {/ w' N, S1 J4 X
FUNCTION U0(x,tr):=60*Io*z*b*(c*tr-x)/(y*y+sqr(b*(c*tr-x)))$ t! z1 e; [# P' z5 }: ^$ \- O
HISTORY( ]: \& \7 T$ p
UrAP (dflt:0), UrBP (dflt:0)% g" m+ D% }: y9 X
UrAN (dflt:0), UrBN (dflt:0)
6 _& t; l9 B# v2 c A$ yUAP (dflt:0), UBP (dflt:0): l2 f# q l N6 x" z
UAN (dflt:0), UBN (dflt:0)/ v9 h" S9 C- S" V3 M; X+ g! T
INIT
1 R! J9 ~, t6 f$ Z7 B' C( adt:= timestep
; U# j3 ^; N4 [/ ab:=v/c
: j. t" m7 D) ]( ~L:=XA-XB# e2 Y9 ^' G; T; a2 y5 ]
FOR Tj:=1 TO 2 DO1 l& R& C9 x: m5 f$ C
if Tj=1 then
; L1 v( l( ]# X' Q" }x:=XA
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x:=-XB
% H! O P' M( l6 T Iend if
7 b" X2 [% H; K2 Fta:=sqrt(x*x+y*y)/c
1 R; T' ~5 q! h! k# Y- z: S% L! otb:=sqrt(sqr(x-L)+y*y)/c/ ~1 N' z d9 r8 o3 @. J
FOR Ti:=0 TO Tmax DO
, i+ I2 ~# W! Y- `Tr:=Ti*dt
B' z3 o& T4 D' hif Tr>ta
# u+ w. O1 v9 @0 [' Xthen. c+ C* r2 l: \- o& T
if Tr>tb+L/c5 O: Z* r( X/ ] G. M
then8 I0 M/ L' p% T6 I3 H
Ui:=U0(x,Tr)*(f(x,Tr)-f(x-L,Tr-L/c))
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Ui:=U0(x,Tr)*(f(x,Tr)+1)* G0 ^, d3 h' j& f
end if
& A5 Q& I! S- c& C% j9 ]' e9 telse
2 X. U, U) ?- X9 OUi:=0' a- A; i) Y1 }) e' [) i3 u
end if: j8 u" w9 t- \/ ?
if Tj=1 then) A. Q$ \3 r$ b0 K0 P/ ]
UindA[Ti]:=Ui else. ?/ f0 {/ i, w5 r* ]
UindB[Ti]:=Ui' B4 Q# f( b: h
endif
6 B5 g4 \$ o( L @# [" _, v; cEND FOR. a E2 E. M4 y# z( n- ^
END FOR+ ]+ l, V M6 g1 C; X; B
FOR Ti:=0 TO Tmax DO - ?% V) N' x; c8 F
Tr:=Ti*dt& b( B' e2 B; x9 B& R
IF (Ti=0) THEN dI[0]:=0
0 l" t! S# B, j: WELSE
4 t( v+ X2 p0 R+ h/ Qe:=exp(-(T1/T2)*exp(ln(m*T2/T1)/m))0 Y/ ~1 e% r: `* r$ b7 d( D c7 N
I:=Im/e*exp(m*ln(Tr/T1))/(exp(m*ln(Tr/T1))+1)*exp(-Tr/T2)
1 M6 O% s8 H% z( @8 G0 D( ?2 CdI[Ti]:=I*((m/Tr)/(exp(m*ln(Tr/T1))+1)-1/T2)
9 v% H; O7 J' q- jEND IF
a. [8 E3 ]5 H* I7 V! @END FOR! L9 U* k; L6 p
Ti:=Tmax
" y& l7 |8 ?/ V" gWHILE Ti>1 DO! d1 c' s& u; E" S$ H
FOR Tr:=1 TO Ti-1 DO
! o- U; N4 J; Y( L/ ]# @- xUindA[Ti]:=UindA[Ti]+UindA[Tr]*dI[Ti-Tr]*dt
6 k) ?) w% S f. V6 n" C( J: ~UindB[Ti]:=UindB[Ti]+( G! h3 S$ Q1 r1 W. W
UindB[Tr]*dI[Ti-Tr]*dt, e; w% Z2 \ v( q; Q
ENDFOR
( Q* F4 e" E4 @. ~* A# W( d6 [Ti:=Ti-1
- x& T0 U* G }' `% CEND WHILE, p0 X$ R& L8 X# n- {8 s/ A* J/ R4 z
* P& ]* j# A# ^& s4 s( Z3 g6 Y9 b
Tr:=L/c
" K( I1 P \5 Z# m7 f5 p6 rEND INIT' p5 q3 W" x: n p
EXEC
) f( x) J. M8 Q; f: I1 cUrAP:=UindA[t/dt]+2*delay(UBP,Tr-dt,1)-delay(UrBP,Tr,1)
7 O- w9 a! S9 a( R8 O' YUrAN:=UindA[t/dt]+2*delay(UBN,Tr-dt,1)-delay(UrBN,Tr,1)
2 {8 n; |8 }1 y$ Z! E. s' }UrBP:=UindB[t/dt]+2*delay(UAP,Tr-dt,1)-delay(UrAP,Tr,1)
9 G' y7 P6 w* a. e1 L: K1 V4 EUrBN:=UindB[t/dt]+2*delay(UAN,Tr-dt,1)-delay(UrAN,Tr,1)
, Y# e2 e2 ~- D g* q& tEND EXEC b- P2 {: j2 F% o# ~0 I
END MODEL: F0 U _+ O' f
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