function YunPengWang
clear;clc
format long
f_number=1e4;
B=2;
a=0.5;
f=0.5584;
F=0.0585E9;
s_all=linspace(4.001498e6,4.0015e6,f_number);
n=length(s_all);
for i=1:n
    s=s_all(i);

y(i)=F*f- (1+B/f/s)*log(1+f*s)/(  quadgk( @(x) exp(-x*(a^2+1))./(1+f*s*exp(-a^2*x))        ,0,Inf    ))  ;
end
plot(s_all,y,'b-',[min(s_all) max(s_all)],[0 0],'r-');

[y_min index]=min(abs(y));
residual_errory=y_min
s_ans=s_all(index)

2Â¥: Originally posted by ÔÂÖ»À¶ at 2016-12-12 20:38:18
mÎļþÈçÏ£º
¼ò±ãÆð¼û£¬ÎÒÓõÄÇî¾Ù·¨£¨¿Ï¶¨»¹ÓÐÆäËûЧÂʸü¸ßµÄ·½·¨£©
²ÎÊýf_number±íʾÔÚÇø¼äÄÚ¼ÆËãµÄ´ÎÊý£¬È¡ÕûÊý£¬ÊýÖµÔ½´ó£¬¼ÆË㾫¶ÈÔ½¸ß£¬ÒÔÏ´úÂëÖÐȡΪ10 000¡£

function YunPengWang
clear;clc
forma ...

2Â¥: Originally posted by ÔÂÖ»À¶ at 2016-12-12 20:38:18
mÎļþÈçÏ£º
¼ò±ãÆð¼û£¬ÎÒÓõÄÇî¾Ù·¨£¨¿Ï¶¨»¹ÓÐÆäËûЧÂʸü¸ßµÄ·½·¨£©
²ÎÊýf_number±íʾÔÚÇø¼äÄÚ¼ÆËãµÄ´ÎÊý£¬È¡ÕûÊý£¬ÊýÖµÔ½´ó£¬¼ÆË㾫¶ÈÔ½¸ß£¬ÒÔÏ´úÂëÖÐȡΪ10 000¡£

function YunPengWang
clear;clc
forma ...

4Â¥: Originally posted by tuburfransth at 2016-12-12 22:25:36
ÄãºÃ£¬¿´µ½ÁËÄãµÄ»Ø´ðÎÒÏëÎÊÒ»ÏÂÄãÔõô֪µÀs_allµÄÈ¡Öµ·¶Î§ÊÇÔÚ4.001498e6,4.0015e6Ö®¼ä£¿s_all=linspace(4.001498e6,4.0015e6,f_number);
...

3Â¥: Originally posted by YunPengWang at 2016-12-12 21:43:23
Èç¹ûFÊÇÒ»¸ö·¶Î§ÄØ£¿¾ÍÊÇÒÑÖªF·¶Î§(0.585e9~5.834e9)£¬È»ºó»­³öFÓëS¹Øϵͼ£¬Çî¾Ù·¨ÊÇ·ñ¿ÉÐУ¿Ð»Ð»´óÉñ£¡
...

function question_12
%2016-12-13
clear;clc
B=2;
a=0.5;
f=0.5584;
%ÔÚÖµÓòÄÚÈ¡20¸öFµÄÖµÀ´Çós
FF=linspace(0.585e9,5.834e9,20);
y=@(F) @(s) F*f- (1+B/f/s)*log(1+f*s)/(quadgk( @(x) exp(-x*(a^2+1))./(1+f*s*exp(-a^2*x)),0,Inf));
[s,fval,exitflag]=arrayfun(@(F) fsolve(y(F),1e8),FF);
%FºÍsµÄ¹ØϵͼÏñ
plot(FF,s,'bo--');
xlabel('F');
ylabel('s')
%×î´óÎó²î
max(abs(fval))

6Â¥: Originally posted by pdl9527 at 2016-12-13 07:23:54
function question_12
%2016-12-13
clear;clc
B=2;
a=0.5;
f=0.5584;
%ÔÚÖµÓòÄÚÈ¡20¸öFµÄÖµÀ´Çós
FF=linspace(0.585e9,5.834e9,20);
y=@(F) @(s) F*f- (1+B/f/s)*log(1+f*s)/(quadgk( @(x) exp(-x*(a ...

6Â¥: Originally posted by pdl9527 at 2016-12-13 07:23:54
function question_12
%2016-12-13
clear;clc
B=2;
a=0.5;
f=0.5584;
%ÔÚÖµÓòÄÚÈ¡20¸öFµÄÖµÀ´Çós
FF=linspace(0.585e9,5.834e9,20);
y=@(F) @(s) F*f- (1+B/f/s)*log(1+f*s)/(quadgk( @(x) exp(-x*(a ...

8Â¥: Originally posted by YunPengWang at 2016-12-14 20:07:19
ÄãºÃ£¬ÎÒ»¹ÏëÎÊһϣ¬ÎªÊ²Ã´ÇóÍêSµÄÖµ£¬»Ø´øµÄʱºò½á¹û»á²»Ò»ÑùÄØ£¿
...

yy=@(s) (1+B/f/s)*log(1+f*s)/(f*quadgk( @(x) exp(-x*(a^2+1))./(1+f*s*exp(-a^2*x)),0,Inf));
feval(yy,s(1))

9Â¥: Originally posted by pdl9527 at 2016-12-14 20:26:10
²»ÖªµÀÄãÖ¸ÄÄÀï²»Ò»Ñù£¬Ä㽫ÏÂÁдúÂë¼Óµ½³ÌÐòµÄ×îÄ©£¬¿ÉÒÔ¿´µ½½«s(1)´øµ½Ô­·½³ÌÖÐÇóµÃµÄFµÄÖµÊÇ5.8500e+08£¬ºÍÌõ¼þÖиøµÄF·¶Î§(0.585e9~5.834e9)ÖеĵÚÒ»¸öÖµÍêÈ«ÎǺϣ¬Í¬ÑùÄã¿ÉÒÔ½«s(20)´øÈ룬ÇóµÃµÄ½á¹ûºÍ×îºóÒ» ...