TABLE OF CONTENTS The solution of nonlinear (and sometimes and linear) problems of modern physics requires the investigation of various kinds of models described by a complex set of equations. Often it is impossible to obtain the solution of such a problem in a useful form, involving only the analytical methods. However even if such a solution is found, it may be written in a complicated form, involving infinite series or integrals. Sometimes the problem of evaluating such series or integrals requires e ?orts commensurable with the numerical solution of the initial task. In such cases it is impossible to produce to some useful result without exploiting the numerical methods or simulation. Such problems deal with the ordinary use of numerical methods and programming. Now one has to reformulate the question by the next way, from which a stage of an investigation it is expedient to exploit the numerical methods more intensively.
Now in view of more active application of various inhomogeneous structures in technology the investigation of the complex models generates the question: in which the way one can take into account the various equally important factors simultaneously?
