Технические науки

Definition of model of subject domain with use of tools of functional networks. Use of monotonous functions for modeling SD. MDSP application in education.

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Convenient method for laboratory experimental studies of material surfaces was developed. The method allowsdetermine the strength of the adhesion and separation for fly our for water droplets, that is important for aircraft in theprocess of further exploitation in clouds

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The mathematical method for the determining of the optimal parameters of the cold straightening of steel sheet from the hot-rolled coil on the sheet-straightening machine by Spanish company Fagor Arrasate is pro-posed. The calculations allow us to determine the type and the curvature of the neutral line of the steel sheet under the straightening, as well as the residual curvature sheet after the flattening depending on the rolls’ radius, the pitch between the straightening machines’ working rolls, the magnitude of the sheet reduction by the upper rollers, the sheet thickness, as well as the elastic modulus, the yield stress and the hardening modulus of the sheet metal. The results of the research can be used at the metallurgical plants in the production of the sheet steel from a hot-rolled coil.

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The article introduces the results of theoreticalstudies of heat transfer in the liquid film flowing downfrom vertical surface. The results of analytical calculationsare compared with the known experimentaldata.

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The influence of chitosan's additions upon electrochemical behaviour of titan in acid aqueous phosphate molybdite solutions in patentialstatical regime is analysed. The formation of composite film on the surfase of titan, which composition, structure and characteristics depend upon natrium and chitosan molibdate concentra-tion in solution is established. The determinant influence upon structure of products' film of molibdate-ions reconstruction is shown.

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With the use of automatic image analyzer and software package, a quantitative estimation of parameters of graphite inclusions in cast iron structure was made. It was developed the empirical models relating the damp-ing capacity and elastic modules of graphitic cast iron ferrite based on the parameters of graphite inclusions: the volume fraction, size, form factor and the specific interphase surface "inclusion-matrix". The model predicts the dissipative and elastic properties of cast iron with the help of the parameters of the inclusions.

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In this paper, the algorithm simulation of liquids and gaseous substances using the Smoothed ParticlesHydrodynamics (SPH) based discretization of the Navier-Stokes equation is considered. The main features of themethod, as well as modern areas of research related to its practical application, is considered.

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To study the processes associated with the conduct of jamming systems identification describes the struc-ture of the process of conflict systems in order to address the problem of disorganization and deterioration in the quality management system forces and means of destruction of the enemy, as well as to create favorable condi-tions for the use of their weapons in armed conflict. Identify indicators that reflect the efficiency of the task.

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Sympa the open source mailing list server subscriber and user accounts compromise method is given. This method is based on issues of pseudorandom number generator used by Sympa. Estimations of method complexity are provided and shown that the part of computations could be done in parallel.

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Two classes of determining the similarity problem of two temporal digraphs for the purpose of temporaldigraphs’ structural properties dynamics change research are defined. Two approaches in development of theproblem solution methods are suggested. Comparative analysis of methods from two suggested approaches isgiven.

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