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签到天数: 21 天 连续签到: 1 天 [LV.4]偶尔看看III 累计签到:21 天 连续签到:1 天
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程序如下:
% {7 w/ o; `( P; i. CMODEL 1
6 O- ~, R, y$ [/ nCONST Tmax (VAL:500)
0 |" V, i0 n+ WIm (VAL:30.e3) 4 j1 J0 x) p2 ^- |- |% c3 ~ l
T1 (VAL:2.e-6) : v: ?5 ~, Z) P1 G) J% p
T2 (VAL:50.e-6) , ^$ u1 ^- ?' w& _, m" `
m (VAL:5) & H$ R% b5 g4 g2 ~7 `! t
c (VAL:3.e8) $ W1 ~( o' O5 [ l& `
v (VAL:1.1e8) 9 X5 E3 P# W, N" J+ Q; `
Io (VAL:1) - e4 J2 ?" _+ U* Y+ s3 j
z (VAL:6)
. W, t9 G- m- k$ `3 KINPUT UAP,UBP,UAN,UBN
( `9 N/ K- p% U4 {# c! {$ e+ e4 j9 uDATA Y,XA,XB 0 n# n9 G- v' V0 G8 a
OUTPUT UrAP,UrBP,UrAN,UrBN
( g1 c* A* ^" S4 H0 kVAR UindA[0..1000],UindB[0..1000],dI[0..1000],
: ^( n: G/ A$ k5 Y% [Tr,Ti,I,e,dt,UrAP,UrBP,UrAN,UrBN,9 }& s: ?% L, v
ta,tb,b,n,L,x,Ko,Ui,Tj N" I! ]: {) D9 C* f# U, W& V
FUNCTION SQR(x):=x*x
* s r/ L3 [. b8 u- UFUNCTION F(x,tr):=(x+b*b*(c*tr-x))/sqrt(sqr(v*tr)+(1-b*b)*(x*x+y*y))
7 A( S/ Z- w+ z2 r2 x. x. S SFUNCTION U0(x,tr):=60*Io*z*b*(c*tr-x)/(y*y+sqr(b*(c*tr-x)))
4 h6 q9 W1 o: e+ G9 sHISTORY
/ s0 g; |4 }; }UrAP (dflt:0), UrBP (dflt:0)
) E8 l3 D; J, E [UrAN (dflt:0), UrBN (dflt:0)
% ~' y: ?. v8 o8 d. rUAP (dflt:0), UBP (dflt:0)
6 y) r! N' X/ p" d# o8 R' mUAN (dflt:0), UBN (dflt:0), S% c7 @; E5 z0 H j6 O1 l% G
INIT6 _) X, h( `: K: f7 X
dt:= timestep
& F, }) ]! d; o% s/ g+ Y3 u9 j8 ab:=v/c
. ?+ Y2 R5 i! ~L:=XA-XB
8 p4 W; q; |( Y0 _$ G6 p7 \7 t; GFOR Tj:=1 TO 2 DO; G! v( ?* W* W+ o3 o6 n a
if Tj=1 then
- J( j9 i. z7 q. ~: ?8 x- _" jx:=XA " k3 F: u* M4 e% C- {( X
else i( l! H3 Z/ r; A
x:=-XB& b z2 C6 Q$ Q4 B% a/ Z0 N
end if3 ~6 M* S( D( G
ta:=sqrt(x*x+y*y)/c
. d' N$ N; ^0 g7 q: l: a4 [* Btb:=sqrt(sqr(x-L)+y*y)/c+ U8 b9 n' h% V8 \0 D0 x
FOR Ti:=0 TO Tmax DO" ?! J) h" G& k+ |: o) R. x! o8 l
Tr:=Ti*dt
. Q$ c3 y+ F) E4 M$ Eif Tr>ta4 i5 U* @, @) w
then, v8 W( B+ {8 m5 ~
if Tr>tb+L/c; ^* ]( h+ U! E4 R$ A z( U
then6 J# N% K# P# D
Ui:=U0(x,Tr)*(f(x,Tr)-f(x-L,Tr-L/c))+ W |7 f' q; h6 i! q( k
else" ^; u w9 A2 y z9 s$ q
Ui:=U0(x,Tr)*(f(x,Tr)+1)
) ]6 n) v+ g: oend if3 {) k: e* S! v3 f
else
+ F8 I4 r, A3 B$ _$ rUi:=0
8 x+ L' _6 @5 x; _$ |7 kend if
1 E$ h( n& T; W: H+ ]8 Cif Tj=1 then
+ {4 L h% K& V$ V5 qUindA[Ti]:=Ui else
1 I4 L# m# V- x% fUindB[Ti]:=Ui
% c v7 [' J1 m. E6 F7 qendif$ q1 h7 a9 E9 _9 h* g$ G
END FOR
. u0 p% h2 u$ ?2 e: }END FOR
5 B7 |' k& X# M2 Y& DFOR Ti:=0 TO Tmax DO
, G* [$ F4 r9 s0 N, ~1 RTr:=Ti*dt) u5 n0 p% T- k+ _0 M0 |! H7 ~
IF (Ti=0) THEN dI[0]:=02 g2 w; b1 J) G; m" S
ELSE0 x, [ Y( j6 U; o" h
e:=exp(-(T1/T2)*exp(ln(m*T2/T1)/m))
( O& u( M! ^+ L% S/ R! vI:=Im/e*exp(m*ln(Tr/T1))/(exp(m*ln(Tr/T1))+1)*exp(-Tr/T2): {+ j& e7 q$ i, X2 h
dI[Ti]:=I*((m/Tr)/(exp(m*ln(Tr/T1))+1)-1/T2)$ C1 o- P/ X' }# C D
END IF8 W) P5 I0 L, N5 U, E- K3 b
END FOR
/ t# d$ v" X' n" k6 LTi:=Tmax
% [7 Y/ i) H5 R, B6 eWHILE Ti>1 DO
. p8 c4 [& r2 t0 m$ g' c) nFOR Tr:=1 TO Ti-1 DO
7 `: O7 w/ Y+ D6 Q4 P. B0 e2 GUindA[Ti]:=UindA[Ti]+UindA[Tr]*dI[Ti-Tr]*dt! b" u" n' U- F0 i
UindB[Ti]:=UindB[Ti]+
$ W( p) } A: a" pUindB[Tr]*dI[Ti-Tr]*dt
, F- k( b7 ?3 V: d# L1 iENDFOR
! g T9 ]" P; U2 \Ti:=Ti-1
: Z' Q% G! S+ a1 ~$ ?2 t" E6 @END WHILE
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Tr:=L/c3 C$ u: Y* M8 _- H. g
END INIT
& k' z; x2 E! m! r3 V/ hEXEC( t. g/ s. Q& p5 r' i
UrAP:=UindA[t/dt]+2*delay(UBP,Tr-dt,1)-delay(UrBP,Tr,1)
: `$ ^1 S" z$ v3 u9 ]$ l" U; r+ tUrAN:=UindA[t/dt]+2*delay(UBN,Tr-dt,1)-delay(UrBN,Tr,1)
* B& H: e, H6 E" l* h# T9 d/ U6 mUrBP:=UindB[t/dt]+2*delay(UAP,Tr-dt,1)-delay(UrAP,Tr,1)! ^2 s1 F+ U* o4 F
UrBN:=UindB[t/dt]+2*delay(UAN,Tr-dt,1)-delay(UrAN,Tr,1)
; `: A! [8 p/ l$ \& L# } X8 HEND EXEC5 T. l: r" g0 u% X) ]. U7 T# N
END MODEL1 @; `) m# g8 c
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