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younghong

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[求助] 三核Gd的磁性拟合公式 (等腰三角形结构) 已有1人参与

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wangningsir

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【答案】应助回帖

感谢参与,应助指数 +1
[General Information]
Function Name = trinuclear
Brief Description =
Function Source = N/A
Number Of Parameters = 10
Function Type = User-Defined
Function Form = Equations
Path =
Number Of Independent Variables = 1
Number Of Dependent Variables = 1
Analytical Derivatives for User-Defined = 0
FunctionPrev = binuclear


[Fitting Parameters]
Names = n,S1,S2,S3,a,g,J1,zJ,Theta,TIP
Initial Values = 2.5(V),2.5(V),2.5(V),1(V),2(V),1(V),1(V),1(V),1(V),--(V)
Meanings = ?,?,?,?,?,?,?,?,?,?
Lower Bounds = --(I, Off),--(I, Off),--(I, Off),--(I, Off),--(I, Off),--(I, Off),--(I, Off),--(I, Off),--(I, Off),--(I, Off)
Upper Bounds = --(I, Off),--(I, Off),--(I, Off),--(I, Off),--(I, Off),--(I, Off),--(I, Off),--(I, Off),--(I, Off),--(I, Off)
Naming Method = User-Defined
Number Of Significant Digits = 0,0,0,0,0,0,0,0,0,0
Unit = ,,,,,,,,,


[Independent Variables]
T =


[Dependent Variables]
ChimT =


[Formula]
double k=0.69503887;   
double NB2=0.260727165;     
double x=1/(k*T);
double S13;  
double St;
double EST;
double SS;
double SSS;
double up;
double down;

up=0;   
down=0;

for (S13=abs(S1-S3);S13<=(S1+S3);S13=S13+1) {  

for (St=abs(S13-S2);St<=(S13+S2);St=St+1) {        

     EST=J1*St*(St+1)+(a-1)*J1*S13*(S13+1);   
     SS=2*St+1;
     SSS=St*(St+1)*(2*St+1);
     up=up+SSS*exp(EST*x);
     down=down+SS*exp(EST*x);
}
}
  
double chi=n*NB2*g^2*up/(3*k*(T-Theta)*down);
double chid=1/chi-2.0*zJ/(NB2*g^2);      
ChimT=T*(1/chid+TIP);   


[Constraints]


[Initializations]


[After Fitting]


[Constants]


[Controls]
General Linear Constraints = 0
Initialization Scripts = 0
Scripts After Fitting = 0
Number Of Duplicates = N/A
Duplicate Offset = N/A
Duplicate Unit = N/A
Generate Curves After Fitting = 1
Curve Point Spacing = Uniform on X-Axis Scale
Generate Peaks After Fitting = 1
Generate Peaks During Fitting = 1
Generate Peaks with Baseline = 1
Paste Parameters to Plot After Fitting = 1
Paste Parameters to Notes Window After Fitting = 1
Generate Residuals After Fitting = 0
Keep Parameters = 0
Compile On Param Change Script = 1
Enable Parameters Initialization = 1


[Compile Function]
Compile = 1
Compile Parameters Initialization = 1
OnParamChangeScriptsEnabled = 0.


[Parameters Initialization]
//Code to be executed to initialize parameters


[Origin C Function Header]


[Origin C Parameter Initialization Header]


[Derived Parameter Settings]
Unit =
Names =
Meanings =


[References]


[QuickCheck]
T=300
n=1
S1=3.5
S2=3.5
S3=3.5
a=1
g=2
J1=0
zJ=0
Theta=0
TIP=0.001

copy到txt文档中,改扩展名为fdf,导入origin中。
文艺青年researchid: http://www.researcherid.com/rid/G-7891-2011
2楼2014-07-22 21:28:18
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