The article presents an approach to modeling local event of radioactive contamination by tritium. It is made by means of spaces of the connected models of different scale of a condition of system. Taken into account the limited movement of tritium in the vertical direction of the porous elastic water-saturated medium. The proposed solution of the issue of restricting the...
Analyzes the uses of waste activated sludge aerotanks sewage treatment plant from the perspective of land protection. Simulation pressures content sludge cards using bioindicators Daphnia magna Straus and determining the properties heattreated sludge aerotanks (compressive strength, coefficient of water resistance, water saturation).
The article described the main indicators of the quality of drinking milk, color, taste, smell, consistence, density, mass fraction of fat, acidity and indicators of honesty of producers - the presence of ammonia, soda. The results of the evaluation of the quality of drinking milk of domestic producers organoleptic and physicochemical parameters.
The indexes of the national dry soluble products’ for enteral nutrition "Reabilakt" and "Reabilakt-D" social significance are researched. The results of their physiological performance’s clinical approbation are presented; the effectiveness of adoption in medical practice is substantiated at a practical example.
The paper considers the state of the resource base pulp and paper industry of Ukraine; analyzed the structure of the domestic market of pulp and paper products; is defined directions of scientific researches aimed at replacement of imported pulp on cellulose from plant material flax and hemp and to determine its suitability for the production of paper from different functional...
It is consider possibility to improving methodology for solving issues in design and technological preparation of production by using methods of pattern recognition. Discriminant analysis was selected as method of resolution technical tasks. The algorithm of this method and a program that implements it were developed. The correctness of the developed program verified by comparing...
In the article the mathematical model of an electronic document based on the use of logical areas, which allows us to develop methods for processing electronic documents different class, in modern systems of electronic document. Completed model of the document consists of two parts: the physical and logical structures. The physical structure includes physical objects in the...
The article is devoted to the tenth anniversary of permanent GNSS-station "Chernihiv» (CNIV). The history of the station, including introducing her to EPN – EUREF Permanent Network, change equipment during operation and the main stages of formation GNSS-network in Ukraine as a whole. The article analyzes the change of coordinates on the work station observations, the effect of...
We consider the one machine scheduling problems of minimizing the total earliness and tardiness of the tasks with one device adjustment depending on the sequence. Proposed heuristic algorithms are empirically evaluated in terms of their effectiveness. The results show that they generate in acceptable solutions that are sufficiently close to optimal.
The analysis of definition the existing ways of the constant amendment electronic rangefinders was carried out. Two methods which don’t need fixing of points on the district and high-quality measurement of distances between these points were selected: with the location of an average tripod out of an alignment and at different height concerning two extreme tripods; with the...
The paper analyzes the factors that have an impact on the problem of collection of environmentally hazardous waste. The groups of factors that must be taken into account in the formation of the spatial structure of the collection. Formulation of the problem is made geoinformation synthesis of spatial network structure collection of environmentally hazardous waste.
The problem of automating the modeling and prediction of electromagnetic pollution in GIS environment, given the sampling methods of geo-space, depending on the simulation scenario, the proposed model of integrated assessment of electromagnetic pollution.
We consider the problem of estimation of the functional efficiency of automated cadastral systems. Proposed indicator, which allows to compare the performance of the various automated cadastral systems.
Results of communication activity functional model development as a basis for creating of modeling information system of professional activity are presented. Functional model was developed using basic principal of communication theory.
A method of parametric adaptations turbocodes under the effect of jamming, that give rise to uncertainties in the decoding process of turbocodes. The essence of the method lies in the choice of parameters adaptive turbocode using a priori and a posteriori information decoder turbocode by minimizing the average risk. The proposed results can be used to improve the reliability of...
The article is dedicated to the synthesis of the straight-line linkage mechanisms which coupler point could trace unsymmetric coupler curves. Synthesis of such mechanisms is an important task due to their high durability, reliability, load capacity in comparison with the other types of mechanisms, for example, cam mechanisms, and have wide application in different branches of...
Proposed the researches of the possibility of using the behavior algorithm of bacteria for modelling the load on client-server network. Considered the main parameters of accordance between bacteria and user. Carried out the experimental researches of efficiency of the proposed model. Proposed the further modifications of the developed model.
Modern GIS in the armed forces should be used in the preparation of the operational control of the military, informational support of combat operations, refinement of topographic maps, determing the location of the troops and individual soldiers, as well as in other fields of forces. The development of a modern army, as well as the development of modern society, based on the...
The paper examines an option piecewise polynomial approximation using the application method "possible directions" by author’s G. Zoutendijk. The method of the possible directions for solving Chebyshev approximation with additional restrictions. The algorithm of solving such problems for the implementation of the method with computations using computing technology. The possible...
The problems of work of network planning systems operating in real-time mode are investigated. The usage of the mathematical apparatus of temporal logic to determine the formal properties of processes of network planning in real time, which make it possible to monitor and forecast these processes, is considered in the article. The use of semantics for propositional logic for...
Influence of low-frequency modulation of welding current is investigational on descriptions of metal of guy-sutures at a hand arc/w on the currents of arc to 70 Amp. It is set that frequency of impulses of current within the limits of 10… 30 Hertzs at porosity 1,5…2 provides the increase of depth of melted of parent metal with the decline of grittiness of weld metal.
In the paper, the portfolio of domestic manufacturers by material bicycle frames, chemical analysis and mechanical properties of aluminum alloys used in the manufacture of bicycle frames. The conclusions and proposalsfor the use of alloys 6061, 7005 and 7075 in various types of bicycle frames.
The structure of the mathematical model of the energy block electric arc furnace, which is part for the establishment of a system of management of modes of melting. Created block diagram model of the thermal unit, which allows you to determine the dynamics of temperature, power and energy of the melting process. These parameters are analysed. Analysis has shown conformity the...
Two methods for determining the effective viscoelastic, piezoelectric and dielectric dynamic characteristics of composite material with piezoelectric layers are considered. According to the first method composite structure isregarded as a quasi homogeneous material using Voigt and Reuss hypotheses. According to the second the numerical analysis of effective characteristics of...
There are various models of the impact of bodies. The most perfect can consider model of S. P. Timoshenko which is illustrated with impact of a body on a beam on hinge supports. Are considered not only deformations of abeam, but also local deformations of both interacting bodies. In this work the impact to a console beam is considered by a body.