[504abee] | 1 | double form_volume(double length, double kuhn_length, double radius); |
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| 2 | double Iq(double q, double length, double kuhn_length, double radius, |
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| 3 | double axis_ratio, double sld, double solvent_sld); |
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| 4 | double Iqxy(double qx, double qy, double length, double kuhn_length, |
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| 5 | double radius, double axis_ratio, double sld, double solvent_sld); |
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| 6 | double flexible_cylinder_ex_kernel(double q, double length, double kuhn_length, |
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| 7 | double radius, double axis_ratio, double sld, |
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| 8 | double solvent_sld); |
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| 9 | double elliptical_crosssection(double q, double a, double b); |
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| 10 | |
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| 11 | double form_volume(double length, double kuhn_length, double radius) |
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| 12 | { |
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| 13 | return 1.0; |
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| 14 | } |
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| 15 | |
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| 16 | double |
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| 17 | elliptical_crosssection(double q, double a, double b) |
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| 18 | { |
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[e7678b2] | 19 | double summ=0.0; |
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[504abee] | 20 | |
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[e7678b2] | 21 | for(int i=0;i<N_POINTS_76;i++) { |
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| 22 | double zi = ( Gauss76Z[i] + 1.0 )*M_PI/4.0; |
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| 23 | double sn, cn; |
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| 24 | SINCOS(zi, sn, cn); |
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| 25 | double arg = q*sqrt(a*a*sn*sn+b*b*cn*cn); |
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[43b7eea] | 26 | double yyy = pow((double)sas_J1c(arg),2); |
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[e7678b2] | 27 | yyy *= Gauss76Wt[i]; |
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| 28 | summ += yyy; |
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[504abee] | 29 | } |
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[e7678b2] | 30 | |
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| 31 | summ /= 2.0; |
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| 32 | return(summ); |
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[504abee] | 33 | |
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| 34 | } |
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| 35 | |
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| 36 | double flexible_cylinder_ex_kernel(double q, |
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| 37 | double length, |
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| 38 | double kuhn_length, |
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| 39 | double radius, |
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| 40 | double axis_ratio, |
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| 41 | double sld, |
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| 42 | double solvent_sld) |
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| 43 | { |
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| 44 | |
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[e7678b2] | 45 | double flex,crossSect, cont; |
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[504abee] | 46 | |
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[e7678b2] | 47 | cont = sld - solvent_sld; |
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| 48 | crossSect = elliptical_crosssection(q,radius,(radius*axis_ratio)); |
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[504abee] | 49 | |
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[e7678b2] | 50 | flex = Sk_WR(q,length,kuhn_length); |
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| 51 | flex *= crossSect; |
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| 52 | flex *= M_PI*radius*radius*axis_ratio*axis_ratio*length; |
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| 53 | flex *= cont*cont; |
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| 54 | flex *= 1.0e-4; |
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[504abee] | 55 | |
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[e7678b2] | 56 | return flex; |
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[504abee] | 57 | } |
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| 58 | |
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| 59 | double Iq(double q, |
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| 60 | double length, |
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| 61 | double kuhn_length, |
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| 62 | double radius, |
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| 63 | double axis_ratio, |
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| 64 | double sld, |
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| 65 | double solvent_sld) |
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| 66 | { |
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| 67 | |
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[e7678b2] | 68 | double result = flexible_cylinder_ex_kernel(q, |
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| 69 | length, |
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| 70 | kuhn_length, |
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| 71 | radius, |
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| 72 | axis_ratio, |
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| 73 | sld, |
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| 74 | solvent_sld); |
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[504abee] | 75 | |
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[e7678b2] | 76 | return result; |
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[504abee] | 77 | } |
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| 78 | |
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| 79 | double Iqxy(double qx, double qy, |
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| 80 | double length, |
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| 81 | double kuhn_length, |
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| 82 | double radius, |
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| 83 | double axis_ratio, |
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| 84 | double sld, |
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| 85 | double solvent_sld) |
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| 86 | { |
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[e7678b2] | 87 | double q; |
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| 88 | q = sqrt(qx*qx+qy*qy); |
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| 89 | double result = flexible_cylinder_ex_kernel(q, |
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| 90 | length, |
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| 91 | kuhn_length, |
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| 92 | radius, |
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| 93 | axis_ratio, |
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| 94 | sld, |
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| 95 | solvent_sld); |
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[504abee] | 96 | |
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[e7678b2] | 97 | return result; |
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[504abee] | 98 | } |
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