Research evidence of plasma parameters effect when spraying aluminum oxide powder, causing the porosity and electrical resistance of the coating is offered in the article. A mathematical model of the coating effect dependence on spray coating modes, e.g. plasmotron distance to underlay surface, current strength and hydrogen consumption is proposed. Positive cor-relation between the porosity and the electrical resistance of the coating is shown.
The paper considers the algorithmic basis of the developed application, which allows the user to select image fragments for viewing not only in enlarged form, but also with increased detail distinctness through brightness-contrast transformations. There has been proposed an algorithm of upsizing and processing the selected image fragment according to the required parameters of average brightness and contrast. The advantages of the proposed method of image processing in comparison with global methods for processing the entire image are investigated. The considered approach develops the advantages when marking low-contrast fragments that are close to monotone in images with fragments of different brightness. The experiments on processing various fragments of images were carried out using a specially developed program. The examples of results have been presented. The behavior of two types of fragments on simplified models of pixel brightness distribution has been analyzed, and for this reason there was made a conclusion about further improving the approach.
The paper describes the problems of processing digital images for enhancing contrast to increase the distinguishability of details, performed by histogram methods that approximate the reduction of the histogram of image brightness to a given distribution. Using the uniform distribution algorithm does not take much time, but it does not regulate the brightness and contrast of the image processed. It is possible to achieve better distinguishability of details using a normal distribution, as compared to the uniform distribution, but in this case the solution requires numerical methods which take much more time. There has been proposed the algorithm of controlling the contrast of a digital image by bringing the luma histogram to a distribution determined by a piecewise constant differential distribution function with two levels of values. This algorithm helps to control the average brightness and contrast, without resorting to numerical methods, very dark and very light low-contrast images having greater distinguishability of details. The mathematical foundations of the proposed algorithm are presented. There have been studied the possibilities of increasing the detail distinguishability in the processed low-contrast image, as compared to the popular method based on bringing the brightness histogram to a uniform distribution.
Ageing quality kinetic model of adhesive compound of metals, when subjected to loadings by normal fracture method, is viewed. The results of the study of compound parameters effect on the pattern of change in the concentration of adhesive bonds are given. The article presents theoretical prediction of compound parameters for a safe ageing quality mode
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