S o m e r e m a r k s f o r u s e r s
The code producing data for the database
has been written in two languages - Pascal and Fortran.
The program files are called NeuroCluster.pas and
NeuroCluster.for, respectively.
The code reads some weights form the files ww_11x, ww_12x
(where x
pas for Pascal and xfor for Fortran),
some numbers from a file data and
output results in the file a_11_12.txt.
The files ww_11x and ww_12x (e.g., ww_11pas, ww_11for,
etc.) contain the weights of the artificial neural network (the two
layer perceptron) which are used to calculate the expansion coefficients
and 
of the scattering matrix elements 
and
(please, contact the
authors
for a code that calculates these weight for different
parameter values).
The file data sets the input vector of the perceptron and the
range of the scattering angles within which the calculations have to
be performed. Since the perceptron has been so far trained for the
fractal dimension 
, the density 
and the size parameter
of cluster's grain 
, the free parameters in the input vector
are the real and imaginary parts of refractive index 
and the number
of grains in the cluster 
. The structure of the input file data
is as follows:
| theta_min | theta_max | del_theta |
| 0 | 180 | 2 |
| Re(m) | Im(m) | N |
| 1.70 | 0.001 | 10 |
Here, as it has been mentioned in the Description,
theta_min, theta_max,
del_theta (all in degree) are the minimum and maximum values,
and the step of change of the scattering angles at which the
scattering matrix elements are calculated.
Re(m) (1.4 < Re(m) < 1.71) and
Im(m) (0.001 < Im(m) <0.1) are
the real and imaginary parts of the complex refractive
index of cluster's grain, N (N < 50)
is the number of grains in the cluster.
Note that the files ww_11x, ww_12x (e.g., ww_11pas, ww_12pas) and
data must be in the same directory as the program NeuroCluster.pas
(or NeuroCluster.for)!
The output file a_11_12.txt contains the expansion coefficients
of the scattering matrix element and 
in series of the
generalized spherical function as well as the angular dependencies of
the scattering matrix elements , 
and the degree of linear
polarization 
(
). The matrix elements are normalized
in the way that integration of over all scattering angle
gives the scattering effeciency 
.
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