The paper deals with a design method of multi-order diffractive intraocular lenses (IOL) that we have developed in order to correct chromatic aberration. It is shown that in order to prevent a color halo around the focused image the phasematching number is selected to attend at each point of the image three color components to get quality image. A computer simulation of multi-order diffractive lens (MODL) in a schematic model of the human eye was carried out. The calculated MODL focuses white light into a segment on an optical axis with high diffractive efficiency. More research needed to study an aberration analysis of lenses of this type.
A GPU-based method of multi-volume rendering is described. the analytic results are supported by simulations of volume rendering on a number of scenes with function-based surfaces. our method supports a large number of volumes, complex translucent functional objects as well as constructive solid geometry intersections of volumes and function-based surfaces.
This article is devoted to the development of an automated system for the theoretical study of hydrodynamic processes occurring in pressure generators of hydraulic vibrating and vibro-impact machines. Intensification of various technological processes in industry and agriculture requires the use of advanced technologies – vibrating and vibroimpact technological equipment. Effective modes of operation hydraulic vibrating and vibro-impact machines are determined by special generators of pressure pulses – valve-pulsers. To study the operating modes of vibrating and vibro-impact machines at various technological parameters, an automated system of mathematical simulation of a hydroimpulse drive has been developed. The method of final volumes in the CFD-program was used to determine the main dependencies of the working parameters of pressure generators for vibrating and vibro-impact machines. The results of automated modeling allowed us to evaluate the efficiency of the developed designs of pressure pulse generators at various operating modes of hydraulic vibrating and vibro-impact technological equipment.
Proposed in the paper are the new algorithms for vibration-based diagnostics of existing defects in hydraulic units. They are based on an artificial neural-like network, which implements spectral analysis of vibroacoustic signals using threedimensional amplitude-frequency-temporal spectra of these signals, such spectra being obtained using discreet wavelet transformation.