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cs24451

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ʹÓÃft=fittype('c(x,£¬L1£¬L2)');
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Expression c(x,L1,L2) is not a valid MATLAB expression, has non-scalar coefficients, or cannot be evaluated:
Error in fittype expression ==> c(x,L1,L2)
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³ö´í fittype>iCreateFittype (line 371)
    testCustomModelEvaluation( obj );
³ö´í fittype (line 328)
                obj = iCreateFittype( obj, varargin{:} );
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    ´íÎóʹÓà fittype/evaluate (line 102)
    Error in fittype expression ==> c(x,L1,L2)
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function [ y ] = c(x,L1£¬L2)
%UNTITLED2 ´Ë´¦ÏÔʾÓйش˺¯ÊýµÄÕªÒª
%   ´Ë´¦ÏÔʾÏêϸ˵Ã÷
m=20; % number of section
n1 = 2.8924;   %AlAs
n2 = 3.3702;   %GaAS
na=1;
ns=n2;
ra=(na-n2)/(na+n2);
r=(n2-n1)/(n2+n1);
ta=sqrt(1-ra^2);
t=sqrt(1-r^2);
y=zeros(1,2500);
ab1=0;
ab2=0;
for kl=1:2500

    beta1 = 2*pi*n1/x(kl)-1i*ab1/2;
    beta2 = 2*pi*n2/x(kl)-1i*ab2/2;
   
    T11_a = exp(1i*beta2*L2)/ta;
    T12_a = ra*exp(-1i*beta2*L2)/ta;
    T21_a = ra*exp(1i*beta2*L2)/ta;
    T22_a = exp(-1i*beta2*L2)/ta;
    T=[T11_a,T12_a;T21_a,T22_a];
   
        for k=1:m-1
            T11_n2 = exp(1i*beta1*L1)/t;
            T12_n2 = r*exp(-1i*beta1*L1)/t;
            T21_n2 = r*exp(1i*beta1*L1)/t;
            T22_n2 = exp(-1i*beta1*L1)/t;
            T_n2=[T11_n2,T12_n2;T21_n2,T22_n2];
            T=T*T_n2;
            
            T11_n1 = exp(1i*beta2*L2)/t;
            T12_n1 = -r*exp(-1i*beta2*L2)/t;
            T21_n1 = -r*exp(1i*beta2*L2)/t;
            T22_n1 = exp(-1i*beta2*L2)/t;  
            T_n1=[T11_n1,T12_n1;T21_n1,T22_n1];
            T=T*T_n1;

        end
        T11_n2 = exp(1i*beta1*L1)/t;
        T12_n2 = r*exp(-1i*beta1*L1)/t;
        T21_n2 = r*exp(1i*beta1*L1)/t;
        T22_n2 = exp(-1i*beta1*L1)/t;
        T_n2=[T11_n2,T12_n2;T21_n2,T22_n2];
        T=T*T_n2;
        
        T_12=[1/t,-r/t;-r/t,1/t]; % from n1 to n2, just cross the interface
        T = T*T_12;
        
        T11_c = exp(1i*beta2*2*L2);
        T12_c = 0;
        T21_c = 0;
        T22_c = exp(-1i*beta2*2*L2);
        T_c = [T11_c,T12_c;T21_c,T22_c]; % n2 cavity
        T = T*T_c;
        
        for k=(1:m)
            T11_n2 = exp(1i*beta1*L1)/t;
            T12_n2 = r*exp(-1i*beta1*L1)/t;
            T21_n2 = r*exp(1i*beta1*L1)/t;
            T22_n2 = exp(-1i*beta1*L1)/t;
            T_n2=[T11_n2,T12_n2;T21_n2,T22_n2];
            T=T*T_n2;
            T11_n1 = exp(1i*beta2*L2)/t;
            T12_n1 = -r*exp(-1i*beta2*L2)/t;
            T21_n1 = -r*exp(1i*beta2*L2)/t;
            T22_n1 = exp(-1i*beta2*L2)/t;  
            T_n1=[T11_n1,T12_n1;T21_n1,T22_n1];
            T=T*T_n1;
        end   
        

        T11_n2 = exp(1i*beta1*L1)/t;
        T12_n2 = r*exp(-1i*beta1*L1)/t;
        T21_n2 = r*exp(1i*beta1*L1)/t;
        T22_n2 = exp(-1i*beta1*L1)/t;
        T_n2=[T11_n2,T12_n2;T21_n2,T22_n2];
        T=T*T_n2;
        
        T_12=[1/t,-r/t;-r/t,1/t];
        T = T*T_12;
        
        T11_c = exp(1i*beta2*9*L2);
        T12_c = 0;
        T21_c = 0;
        T22_c = exp(-1i*beta2*9*L2);
        T_c = [T11_c,T12_c;T21_c,T22_c]; % n2 cavity
        T = T*T_c;
        
        T11_n2 = exp(1i*beta1*L1)/t;
        T12_n2 = r*exp(-1i*beta1*L1)/t;
        T21_n2 = r*exp(1i*beta1*L1)/t;
        T22_n2 = exp(-1i*beta1*L1)/t;
        T_n2=[T11_n2,T12_n2;T21_n2,T22_n2];
        T=T*T_n2;
        
        rs1=(n1-ns)/(ns+n1);
        ts1=sqrt(1-rs1^2);
        T11_s = 1/ts1;  % n1 to substrate
        T12_s = rs1/ts1;
        T21_s = rs1/ts1;
        T22_s = 1/ts1;
        T_s = [T11_s,T12_s;T21_s,T22_s];
        T=T*T_s;
        y(kl) = (abs(T(2,1)/T(1,1)))^2;
end

end
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512095518

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2Â¥2016-08-31 19:11:07
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cs24451

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ÒýÓûØÌû:
2Â¥: Originally posted by 512095518 at 2016-08-31 19:11:07
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3Â¥2016-08-31 23:37:42
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512095518

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3Â¥: Originally posted by cs24451 at 2016-08-31 23:37:42
ÊÇµÄ £¬ÎÒÒѾ­ÉèÖÃÁËx,yÖµ£¬ Ïëͨ¹ýÎҵĺ¯Êýc£¨x,L1,L2£©À´ÇóµÃºÏÊʵÄL1ÓëL2Öµ...

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4Â¥2016-08-31 23:48:58
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cs24451

Ìú³æ (³õÈëÎÄ̳)

ÒýÓûØÌû:
4Â¥: Originally posted by 512095518 at 2016-08-31 23:48:58
ÎÒÏë°ïÄ㣬¾Í±ØÐëÖ»ÒªÄãµÄx£¬yÊýÖµ£¬»¹Óдý¶¨µÄL1 L2£¬È»ºóÎÒÔÙ³¢ÊÔ¿´¿´Ôõô±àд´úÂë...

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  • 2016-09-01 00:44:54, 69.71 K
5Â¥2016-09-01 00:45:30
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512095518

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ÒýÓûØÌû:
5Â¥: Originally posted by cs24451 at 2016-09-01 00:45:30
ÎÒ°ÑÏëx,y L1 L2µÄÖµ¶¼Ð´ÔÚexcelÀïÃæÁË

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L1 = -9.02438565124979e-09
L2 = -8.31832684073256e-09
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6Â¥2016-09-01 13:31:34
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cs24451

Ìú³æ (³õÈëÎÄ̳)

ÒýÓûØÌû:
6Â¥: Originally posted by 512095518 at 2016-09-01 13:31:34
L1 = -9.02438565124979e-09
L2 = -8.31832684073256e-09
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7Â¥2016-09-01 16:13:49
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512095518

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ÒýÓûØÌû:
7Â¥: Originally posted by cs24451 at 2016-09-01 16:13:49
¶î  Â¥Ö÷ÔõôʵÏֵĠ ÄÜ˵ÏÂô  ÎÒÕâ¸öL1 L2´ú±í³¤¶È£¬ Ï£ÍûÔÚÎÒ¸ø³öµÄÖµ¸½½ü¸¡¶¯£¬²»ÄÜΪ¸º¡£¡£¡£...

ÕýÊýÒ²Ò»Ñù£¬°Ñ¸ººÅÈ¥Á˾ÍÐУ¬´úÂëÈçÏ£¬ÎÒÊÇMATLAB R2016a
CODE:
function F = myfun(b)
data = load('a.txt');
x = data(:,1); yn = data(:,2);
m=20; % number of section
n1 = 2.8924;   %AlAs
n2 = 3.3702;   %GaAS
na=1;
ns=n2;
ra=(na-n2)/(na+n2);
r=(n2-n1)/(n2+n1);
ta=sqrt(1-ra^2);
t=sqrt(1-r^2);
y=zeros(1,2500);
ab1=0;
ab2=0;
for kl=1:2500

    beta1 = 2*pi*n1/x(kl)-1i*ab1/2;
    beta2 = 2*pi*n2/x(kl)-1i*ab2/2;
   
    T11_a = exp(1i*beta2*b(2))/ta;
    T12_a = ra*exp(-1i*beta2*b(2))/ta;
    T21_a = ra*exp(1i*beta2*b(2))/ta;
    T22_a = exp(-1i*beta2*b(2))/ta;
    T=[T11_a,T12_a;T21_a,T22_a];
   
        for k=1:m-1
            T11_n2 = exp(1i*beta1*b(1))/t;
            T12_n2 = r*exp(-1i*beta1*b(1))/t;
            T21_n2 = r*exp(1i*beta1*b(1))/t;
            T22_n2 = exp(-1i*beta1*b(1))/t;
            T_n2=[T11_n2,T12_n2;T21_n2,T22_n2];
            T=T*T_n2;
            
            T11_n1 = exp(1i*beta2*b(2))/t;
            T12_n1 = -r*exp(-1i*beta2*b(2))/t;
            T21_n1 = -r*exp(1i*beta2*b(2))/t;
            T22_n1 = exp(-1i*beta2*b(2))/t;  
            T_n1=[T11_n1,T12_n1;T21_n1,T22_n1];
            T=T*T_n1;

        end
        T11_n2 = exp(1i*beta1*b(1))/t;
        T12_n2 = r*exp(-1i*beta1*b(1))/t;
        T21_n2 = r*exp(1i*beta1*b(1))/t;
        T22_n2 = exp(-1i*beta1*b(1))/t;
        T_n2=[T11_n2,T12_n2;T21_n2,T22_n2];
        T=T*T_n2;
        
        T_12=[1/t,-r/t;-r/t,1/t]; % from n1 to n2, just cross the interface
        T = T*T_12;
        
        T11_c = exp(1i*beta2*2*b(2));
        T12_c = 0;
        T21_c = 0;
        T22_c = exp(-1i*beta2*2*b(2));
        T_c = [T11_c,T12_c;T21_c,T22_c]; % n2 cavity
        T = T*T_c;
        
        for k=(1:m)
            T11_n2 = exp(1i*beta1*b(1))/t;
            T12_n2 = r*exp(-1i*beta1*b(1))/t;
            T21_n2 = r*exp(1i*beta1*b(1))/t;
            T22_n2 = exp(-1i*beta1*b(1))/t;
            T_n2=[T11_n2,T12_n2;T21_n2,T22_n2];
            T=T*T_n2;
            T11_n1 = exp(1i*beta2*b(2))/t;
            T12_n1 = -r*exp(-1i*beta2*b(2))/t;
            T21_n1 = -r*exp(1i*beta2*b(2))/t;
            T22_n1 = exp(-1i*beta2*b(2))/t;  
            T_n1=[T11_n1,T12_n1;T21_n1,T22_n1];
            T=T*T_n1;
        end   
        

        T11_n2 = exp(1i*beta1*b(1))/t;
        T12_n2 = r*exp(-1i*beta1*b(1))/t;
        T21_n2 = r*exp(1i*beta1*b(1))/t;
        T22_n2 = exp(-1i*beta1*b(1))/t;
        T_n2=[T11_n2,T12_n2;T21_n2,T22_n2];
        T=T*T_n2;
        
        T_12=[1/t,-r/t;-r/t,1/t];
        T = T*T_12;
        
        T11_c = exp(1i*beta2*9*b(2));
        T12_c = 0;
        T21_c = 0;
        T22_c = exp(-1i*beta2*9*b(2));
        T_c = [T11_c,T12_c;T21_c,T22_c]; % n2 cavity
        T = T*T_c;
        
        T11_n2 = exp(1i*beta1*b(1))/t;
        T12_n2 = r*exp(-1i*beta1*b(1))/t;
        T21_n2 = r*exp(1i*beta1*b(1))/t;
        T22_n2 = exp(-1i*beta1*b(1))/t;
        T_n2=[T11_n2,T12_n2;T21_n2,T22_n2];
        T=T*T_n2;
        
        rs1=(n1-ns)/(ns+n1);
        ts1=sqrt(1-rs1^2);
        T11_s = 1/ts1;  % n1 to substrate
        T12_s = rs1/ts1;
        T21_s = rs1/ts1;
        T22_s = 1/ts1;
        T_s = [T11_s,T12_s;T21_s,T22_s];
        T=T*T_s;
        y(kl) = (abs(T(2,1)/T(1,1)))^2;
end
F = y'-yn;

CODE:
b0 = [-0.5e-9,-0.5e-9];
options = optimoptions(@lsqnonlin,'TolFun',1e-20,'TolX',1e-20,...
    'Algorithm','levenberg-marquardt','Plotfcns',@optimplotfval,...
    'OptimalityTolerance',1e20,'MaxIterations',1500,...
    'Display', 'iter-detailed','MaxFunctionEvaluations',2000);
K2 = lsqnonlin(@myfun,b0,[],[],options);

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8Â¥2016-09-01 21:20:02
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cs24451

Ìú³æ (³õÈëÎÄ̳)

ÒýÓûØÌû:
8Â¥: Originally posted by 512095518 at 2016-09-01 21:20:02
ÕýÊýÒ²Ò»Ñù£¬°Ñ¸ººÅÈ¥Á˾ÍÐУ¬´úÂëÈçÏ£¬ÎÒÊÇMATLAB R2016a
function F = myfun(b)
data = load('a.txt');
x = data(:,1); yn = data(:,2);
m=20; % number of section
n1 = 2.8924;   %AlAs
n2 = 3.3702;   ...

ÎÒ´øÈëÁËһϠ ²»Ì«¶Ô°¡  ÕâÊÇÎÒÏëÒªÄâºÏµÄÇúÏß
matlabʹÓÃ×Ô¶¨Ò庯ÊýÎļþÄâºÏ³öÏÖ´íÎó
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9Â¥2016-09-02 01:04:37
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cs24451

Ìú³æ (³õÈëÎÄ̳)

ÒýÓûØÌû:
8Â¥: Originally posted by 512095518 at 2016-09-01 21:20:02
ÕýÊýÒ²Ò»Ñù£¬°Ñ¸ººÅÈ¥Á˾ÍÐУ¬´úÂëÈçÏ£¬ÎÒÊÇMATLAB R2016a
function F = myfun(b)
data = load('a.txt');
x = data(:,1); yn = data(:,2);
m=20; % number of section
n1 = 2.8924;   %AlAs
n2 = 3.3702;   ...

ÕâÊÇÎÒÔ­ÓеÄL1 L2´øÈëÖ®ºóµÄÇúÏß
matlabʹÓÃ×Ô¶¨Ò庯ÊýÎļþÄâºÏ³öÏÖ´íÎó-1
111.jpg

10Â¥2016-09-02 01:08:01
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