It is established that the security of information and telecommunication systems depends significantly on the high level of efficiency of the access control and data protection systems. However, the constant decline in the relevance of password and attribute methods of identification/authentication of users requires the search for new ways to protect information from unauthorized...
The paper presents the results of a study of the possibilities of the optimization task of allocation of 3D models of products in the working space of layered building by additive manufacturing by the Monte Carlo method. The proposed method of allocation of 3D models of products in the workspace using the Monte Carlo method allows reducing the time of technological preparation...
The design of the cleaning machine of root crops from pollution by a dry way which can be applied to the various types and the sizes is developed. The machine uses the energy of vibration oscillations to ensure the cleaning process by rubbing the surfaces of the roots between themselves and the sieve of the working container. The cleaning process can be continuous or periodic...
The article considers the structure and principle of operation of the weapon stabilization system, which is technically a set of sensors and a computer system connected to the gun drive. The stabilization system ensures the constancy of the angles between the axes of the fixed coordinate system and the axes rigidly connected to the object of stabilization. It is established that...
Nowadays, most countries are projecting the scientific and practical development vector on the introduction of modern computer information and measuring technologies into the agricultural sector. This fact positively affects the national economy growth. One of the most important and informative stages of the crops growing on the open ground is the agricultural work objective...
This work contains a review of research in the field of development of a new generation of metalworking machines for the manufacture of components up to just a few millimeters made with high accuracy from various materials. The paper shows several new, recently developed micromachines with the ability to manufacture a wide range of products. The second part of the work...
The development of machine tools, as an integral part of mechanical engineering, is an important component of economic growth in any country. Machine tool construction largely determines the conditions for the growth of industrial production based on the use of the latest technologies, equipment, methods of organization of production. Production efficiency is determined by the...
The paper considers linear programming problems with Boolean variables. This is a part of mathematical programming focused on solving practical optimization problems, which could be solved and correctly described with a mathematical model of the problem of linear programming with Boolean variables. The discussed methods for exact and approximate solutions are constructed taking...
The paper investigates the use of CAD-CAM technologies for the design and manufacture of parts on machines with numerical program control (CNC). These technologies allow designing technological routes of processing of surfaces of details of various complexity and making them on modern processing centers with CNC, and their use in the conditions of small-scale, single productions...
Inertial sensors are used for human motion capture in a wide range of applications. Some kinds of human motion can be tracked using inertial sensors incorporated in smartphones or smartwatches. However, the latter can scarcely be used if misclassification of user activities is intolerable. In this case electronics and embedded software engineers should design, implement and...
The main problem of dimensional ring parts turning is insufficient rigidity of work piece and technological system at all. In many cases due to the ring parts clamping their deformations are proportionate to the machining tolerance. In this way the achievement of the given parameters of ring work pieces machining surface shape accuracy is a complicated technological and...
У статті розглянуто одну з областей штучного інтелекту – нейронні мережі, що застосовуються у різних галузях суспільства. Функціонування будь-якої системи стає набагато ефективніше за допомогою розв’язання задач на основі нейронних мереж. Класи задач, які можна розв’язувати за допомогою нейронних мереж, визначаються тим, як вони працюють і навчаються. Метою роботи є дослідження...
The service quality at car service enterprises is an important characteristic. For researching the influence of various factors on the quality level of technological processes, a functional model (scheme) was developed. The main elements of the scheme are energy, mass and information flows, which form the inputs and outputs in the system processes, feedback, environments and...
The results of studies on establishing a rational diameter of wells during the destruction of rock massifs by an explosion are presented. It is proved that the diameter of the borehole for explosive destruction of rocks belongs to the main parameters of drilling and blasting in quarries, and its value should be selected depending on the type of explosive, properties and degree of...
One of the main features in the development of deposits of natural facing stone is the requirement to maintain the solidity of the blocks being mined and their decorative properties, to ensure the correct geometric shape. These requirements satisfy the mechanical means of separating blocks. These methods include the hydrocline and wedge method of dividing the array (monolith...
The efficiency of technological schemes at the mining watered titanium-zirconium deposits was established for the condition of the Motronovsky mining and processing plant pit by the index of the investments payback period. The main components of technological schemes for the mining of flooded placer deposits, which affect on investment attractiveness assessment, are considered...
The paper considers the problems that have arisen during the implementation of underground coal gasification technology at coal deposits development of coal fields, with the transportation of the generator gas. The future direction of gas transportation in the form of gas hydrates which reduce the system of industrial and main gas pipelines is proposed. The Clausius-Clapeyron...
Purpose. The purpose of the study is to justify the conditions of stability and features of manifestations of rock pressure on the circuit of local preparatory workings with different methods of protection in deep mines.Research Methods. An integrated approach is used, including analysis and generalization of theoretical and experimental studies on the problem of the stability of...
The peculiarity of bioradar location is that the observed objects, as a rule, make not rectilinear, but reciprocating movements (human heart and chest). Obtaining the correct monitoring results is also complicated by the fact that the observation is performed against the background of the reflection of the radar signal from the objects surrounding the observed object. In fact...
The problem of waste is urgent for the whole world. A separate link that forms a major threat to the environment is plastic products. More and more relevant is the study of the prospects of using various methods of biological degradation of plastic, which is an innovative means of solving the problem of plastic waste. Various methods of plastic biodegradation are analyzed in the...
An option of development a new design solution for tools based on inductor systems is proposed. For the first time, a planar inductor system consisting of a thin solenoid – an inductor located between the coils of a bifilar – massive multi-turn coils of well-conducting metal is considered. On the basis of the solution of the electrodynamics’ problem, analysis and numerical...
A device for the preparation of a water-filled foamed explosive composition is proposed, which can be used in field conditions for compacting subsidence of unstable soils. Foamed water-filled explosive composition consists of ammonium nitrate, surfactants and water. The method of preparation of foamed explosive composition, which consists in mixing surfactants with water and then...
One of the main tasks of managing groups of dynamic moving objects is to ensure their consistent movement in space. It is advisable to optimize the movements (motion) in space using mathematical models i.e. systems of equations of motion. The movement of any moving object can be represented as a combination of reciprocating and rotational motion, and the velocity of the object as...
The mathematical expressions, specifying the estimation of the capabilities of remote sensing satellites with opto-electronic imaging equipment for observing the Earth’s surface with the necessary (predetermined) spatial resolution of the space imaging materials when deflecting the optical axis of on-board information complex, are obtained and substantiated in the article. The...
Waste of the metalworking industry is analyzed from the point of view of their further processing. There is a lack of effective methods of processing and disposal of grinding sludge and, as a consequence, a negative impact on the environment. Existing methods of grinding sludge processing are analyzed. The expediency of applying the method of metallurgical remelting under the...