求fh3函数在[0.001 0.01]和[0.003 0.1]之间的最小值,估计在1至5之间。 # C e2 W6 ? N, R" w/ b3 y( P7 J: p
function f=fh3(n)2 _3 ^2 K6 `. A% t9 o# |2 E
g2=2^0.5-1;" _, a+ i/ \6 a) p n% {
mu0=4*pi*10^(-7);: }, Z" B7 B6 `. N+ J6 g: i6 R
gaf=7.8*10^3;
0 Y- v' B( W7 B- ]) s$ m4 vgacu=8.9*10^3;8 k+ Z/ j) D) r& r& `; Y; M) N5 N
gat=4.5*10^3;2 g2 X% k" _4 E
gaa=2.7*10^3;8 B) a" ?" @# T* g# L9 z
p=2.7*10^4;5 ^/ \* H2 u3 E. s$ m, \8 w4 R
q=3*10^(-5);
1 F6 A/ M% O" P* [; erou=0.7;
0 y+ g" d* M5 c/ skb=0.9;
# B6 r$ _7 [% k4 F- @%j0=8*10^6;7 C( s! o9 w$ Y9 r0 l" e" m
j0=2*10^6;
! B! V, `, b y: qkd=3;
9 n7 i, l, _, [" A; L& Pbm=2;
) j6 M; R. A( w5 uht=2*10^(-3);6 L" ]& O8 u* X5 \0 p" E7 y4 \
mu1=10^8/1.75;, }: E, a. D ]. U4 s
kt1=2*pi*gat*ht;' X& Z. u! \1 c: [
kt2=2*pi*gaa*ht;
. v) E7 N9 }* _, V! M1 Xkr=1.02;
* I( C& b5 E/ t( _. b8 ]ku=(mu0/2/bm)^0.5;0 j: b, Z! ~4 ^" M% H% z& u
kx=mu0^0.5*kb*kd^2*j0;
@7 A8 l* ^- Z5 ]/ Jkp=(2*q/pi/p)^0.5;
$ M# @, ], J) a4 z! gkg=mu0^0.5*kb*kd*j0*g2;$ L& x! A- X3 B( f
rx=ku*kx-kp*kg;
( A6 V* p* ]5 ?ra=ku*kg;0 C' d# }: Q X$ @4 s9 ~ y
rc=kp*kx; l, b/ \) ^$ a2 ], A: ?" F+ H1 X8 \
kj=mu0*kb*kd*j0;
3 y) Z# r: O# t8 Z! r0 X8 Q3 Zkj=kj/kx;2 j# s9 p( C, T. m. I
h0=3*ht;
9 P; D, o" f( j3 A4 l- G: |h1=2*(1+1/rou)*q/pi;
9 l3 m, l3 x" Y. yh2=2*(kd-1);
9 u/ B9 Y1 R+ F. jh3=1/bm*(mu0*p*q/(2*pi))^0.5;5 X, z( M- G* N. |3 D' t! I5 H
h4=1/kj*(mu0*p*q/(2*pi))^0.5;7 y$ h4 m6 X6 y
hg=2*pi*kr*ht;
0 f- A# i3 d3 b- A7 D$ Rw1=gaf/bm*(pi*p*q*mu0/2)^0.5;( X. l0 |1 c8 E
w1p=8*g2*kd*w1;8 W! k, f8 g; |( i) c; }2 {* w2 B* h
w2=2*kd^2*gaf*(2*pi*mu0*p*q)^0.5/kj;% E3 X( L: \# X4 }) `
w3p=2*g2*gacu/kj*(2*pi*p*q*mu0)^0.5;9 J! N, I9 Y6 W+ [
w3pp=hg*h3;
' O- @$ w$ _6 j8 _! ]w3=w3p+w3pp;# ^& v0 @1 m5 O' G
w4=2*kd*gacu/kj*(2*pi*p*q*mu0);
6 A6 _9 w. l: J6 F( |+ Uw5=5*pi*ht*gat;
! Y/ t0 c3 t8 `; Y4 Jw6=hg*h0*gat;9 m8 I" P8 u6 l; T
w7=hg*h1*gat;1 g$ X6 {2 |! W1 y( [
w8=hg*h0*gat;$ V1 K8 ~$ l: P
w9=hg*h4*gat;6 K- I" X4 g5 P" ?- I: O7 _( p' K
f=w1p*r*x^0.5+w2*x^1.5/(g2*r-kd*x)+w3*r*x^(-0.5)+w4*x^0.5+w5*r^2+w6*r+w7/r+w8*r*x+w9*r*x^(-0.5)/(g2*r-kd*x);! W# d1 G8 v) z( Q
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