dispersion

Наведено результати дослідження оцінювання якості поверхні матеріалу за допомогою статистичних ознак зображення, зокрема розподіленої дисперсії, дисперсії силуетів та знімків. За базовий інструмент дослідження прийнято пакет визначення статистичних ознак візуальних образів.

The paper contains the results of material surface evaluation using statistical features of an image, in particular, using the distributed dispersion, dispersion of silhouettes and intensity pictures. The package of visual images feature extracting is considered as basic research tool.

Розроблено швидкий метод суміщення зображень у наборі однотипних зображень на основі розв’язання задачі майже факторизації простору топології зображень з подальшим звуженням цього простору через розв’язання задачі пошуку кореляційного максимуму. Задача майже факторизації формулюється через введення напівметрики стосовно дисперсії кольору елементів топології зображення.

The electrical mode (ER) of arc steel-melting furnaces (ASF) is characterized by a dynamic, random, non-stationary, phase-by-phase asymmetric and phase-by-phase interconnected nature of the change. Control takes place in the conditions of incomplete information about the state of the ER and the technological process and changes in the parameters of the elements of the power circuit and the three- phase system of arcs.

The article shows the relation between sustainability and cement manufacture that can be obtained by the replacement of clinker with limestone additive. This decreases the use of energy resources and reduces CO2 emissions in cement production. The issue of partial Portland cement clinker substitution by finely ground limestone in the production of market-oriented types of cement type CEM II is solved on the cement plant PJSC "Ivano-Frankivsk Cement".

Magnetic hydrogels form a class of soft materials with remote controllable properties that have attracted great attention due to their applications in biomedical engineering, including tissue engineering, drug delivery and release, enzyme immobilization and cancer therapy.

The results of statistical measurements of the resistance of the metal film resistor are given below. The analysis of the dependencies of the standard deviation on the number of measurements σR(N)envisages a tendency of  raising σR with the number of measurements. It indicates that the obtained results are not independent since fluctuations of them are not of “white” noise type. The dependence of the standard deviation of measurement results onN confirms the results of other studies.

In the paper, based on the Fokker--Planck--Kolmogorov equation and the statistical control theory, a mathematical model for the operative synthesis of optimal controlling influences for stabilization of the electric mode of an electric arc furnace in a two-contour structure with a high-speed electric circuit for regulating the arc currents is suggested.

In order to predict ecological safety conserning cocoa dust emission (SP2,5 and SP10), the mathematical modeling of its dispersion was performed considering the atmosphere turbulent diffusion. Necessary gravity sedimentation rate of cocoa dust for modeling was identified during the experimental
researches. Obtained results indicate the necessity of intensification of fine particles emission clean-up in the observed confectionery factory.

This paper presents the results of equivalent measurements of electrical resistance of two identical resistive coils. It is suggested that the difference between the RMS of investigated coils is formed as result of their non-equilibrium states. The energy spectrum of resistance fluctuations of investigated coils and the frequency range within which the energy spectrum changes unsignificantly, are determined. 

The factors which allow obtaining stable polymer dispersions in the water of new amphiphilic polyesters based on the polyeterdiols as hydrophilic blocks and N-acylderivatives of glutamic acid as lipophilic blocks were proved. The dependence of the stability of the obtained dispersions on the macromolecule structure and polyoxyethylene fragment molecular mass in its structure was established. The macromolecules of new pseudo-poly(amino acid) according to their colloidal, chemical and biomedical parameters can be used for polymer systems shipping  design of therapeutic means.