bluuebunny/crossref_metadata_2025_split huggingface dataset:
Development of a hybrid neural network model for mine detection by using ultrawideband radar data
Authors: Lytvyn Vasyl , Peleshchak Ivan , Peleshchak Roman , Mediakov Oleksandr , Pukach Petro 
Published: July 2023

The object of the study is the architecture of a hybrid neural network for mine recognition using ultra-wideband radar data. The work solves the problem of filtering reflected signals with interference and recognizing mines detected by ultra-wideband (UWB) radar. A hybrid neural network model in combination with the Adam learning algorithm is proposed. Filtering of reflected signals from mines is carried out using an MLP (multilayer perceptron) filter, which selects low-amplitude parts of signals that carry information about a hidden mine from the entire reflected signal. Mine recognition is carried out by a Hilbert block and an oscillatory neural network, which are included in the structure of a hybrid neural network. The peculiarity of the obtained results, which allowed to solve the investigated problem, is the transformation of the signal frequency by the Hilbert block and the recognition of mines by the oscillatory neural network in the resonant mode. The three-layer MLP filter effectively filters out the unwanted component in the total signal reflected from the subsurface object, as the MSE (Mean Squared Error) of the MLP filter is 1·10-5. If the frequency of the Hilbert signal is equal to the natural frequency of oscillations of neurons then the recognition of signals with a small amplitude from subsurface objects is carried out by an oscillatory neural network based on the resonant amplitude, which is indicated by a small value of cross-entropy. The proposed model of a hybrid neural network provides amplification of useful signals due to resonance and has higher performance compared to existing models of artificial neural networks. The practical significance of the obtained results lies in their application in the field of automated neural network technologies for detection and recognition of subsurface objects of various nature based on reflected radar signals with an amplitude at the noise level
Designing engobe coatings for ceramic bricks
Authors: Khomenko Olena , Tsyhanenko Liudmyla , Tsyhanenko Hennadii , Borodai Artem , Borodai Dmytro , Borodai Serhii 
Published: July 2023

This paper reports research into the development of compositions of engobe coatings for ceramic bricks and investigating the influence of technological production factors on their physical and mechanical properties. The results of this work make it possible to solve the task of expanding the range and improving the operational properties of building ceramics.
The data obtained have made it possible to establish physicochemical processes occurring during the formation of the phase composition and structure of engobe coatings. This has revealed the possibilities for designing engobe for various types of ceramic bricks, which differ in technological parameters of production and operational properties.
The charge compositions were designed in a three-component system "refractory clay – quartz sand – cullet", taking into account the possibility of their practical implementation in large-tonnage production. It has been established that the most important condition for obtaining high-quality products is the correlation of shrinkage and temperature coefficients of linear expansion of the ceramic shard and engobe coating. To prevent various defects, these indicators should vary by no more than 10 %.
The crystal-phase composition of engobe is represented by b-quartz and a small amount of devitrite, which are evenly distributed in a vitreous dense layer of coating on the surface of the ceramic shard.
Distinctive features of the results relate to the fact that a solution to the problem of designing engobe coatings for ceramic bricks has been proposed and the physicochemical bases of production have been highlighted. This paper also suggests ways to achieve coordination of finely dispersed coatings with coarse-grained ceramic masses by shrinkage and thermal processes.
The results reported here could be applied in typical production of face, clinker, and in some cases – ordinary brick or ceramic stone with firing temperatures of 950–1150 °C
The role of addition of calcium alginate microcapsules on permanent deformation of AC–WC natural asphalt Buton stone in Indonesia
Authors: Desvita Melly Dwi , Djakfar Ludfi , Wisnumurti Wisnumurti , Prasetia Muhammad Syarif , Febriansyah Muhammad Chaidar 
Published: July 2023

This paper discusses natural asphalt deposits of Buton stone (asbuton) in Indonesia are very abundant, but the characteristics of asbuton are not yet suitable for road applications. So that the use of asbuton as a binder needs to be added with additives that can react independently to overcome the permanent deformation such as the addition of calcium alginate microcapsules to the asphalt mixture. The purpose of this study was to determine the effect of adding calcium alginate microcapsules to the permanent deformation of AC-WC with asbuton.
The current problem is that road pavements are not able to heal themselves when cracks start to occur, so additional materials are needed that can stimulate self-healing to occur so that the cracks that have started to occur can be closed again even though it takes time so that the self-healing process can occur.
The microcapsules are made with the main ingredients of water, sunflower oil, sodium alginate (C6H7O6Na) and calcium chloride solvent (CaCl2), which are encapsulated and embedded in the asphalt mixture as a material that can restore the structural function by a healing method self healing. The research method uses true experimentally. Specimen variations in the study were the addition of calcium alginate microcapsules of 0 %, 1 %, 1.5 %, 2 %. Wheel Tracking Testing was carried out with the AASHTO Standard: T 32-11 and CAL Testing with the Tex-245-F 2014 standard. The results showed that with the addition of calcium alginate microcapsules, there was no significant contribution; better than microcapsules, the mixture decreases in the number of passes so that the mixture is easy to change shape rutting. However, adding calcium alginate microcapsules can reduce the value of weight loss, causing the adhesion of the asphalt mixture to increase
Development of the solution search method using the population algorithm of global search optimization
Authors: Yakymiak Stepan , Vdovytskyi Yevhenii , Artabaiev Yurii , Degtyareva Larisa , Vakulenko Yuliia , Nevhad Serhii , Andronov Vitalii , Lazuta Roman , Shapoval Petro , Artamonov Yevhen 
Published: July 2023

The research objects are decision making support systems. subject research is a decision making process in management tasks using bio-inspired algorithms. A method of finding solutions using the population algorithm of global search optimization is proposed. Joint use of invasive weed algorithm is proposed, genetic algorithm and evolving artificial neural networks are improved. The method has the following sequence of actions:
‒ an input of initial data;
‒ processing of initial data taking into account the degree of uncertainty;
‒ formation of the optimization vector;
‒ creation of descendant vectors;
‒ ordering of vectors in descending order;
‒ reducing the dimensionality of the feature space;
‒ teaching knowledge bases.
The peculiarity of the proposed method lies in the placement of agents-weeds, taking into account the uncertainty of the initial data, improved procedures for reducing the space of signs about the analysis object state.
Training of synaptic weights of an artificial neural network, type and parameters of the membership function and the architecture of individual elements, and the architecture of an artificial neural network as a whole is carried out. The proposed method was simulated in the MathСad 14 software environment. The task to be solved during the simulation was to determine the route of the ships in the operational zones of the Black and Azov seas in the conditions of hybrid actions of the enemy. The use of the method makes it possible to increase the efficiency of data processing at the level of 21–27 % due to the use of additional improved procedures. The proposed method should be used to solve the problems of evaluating complex and dynamic processes in the interests of solving national security problems
Constructing a model of the influence of structural and technological inhomogeneities on electromagnetic energy losses in cables based on a twisted pair
Authors: Bezprozvannych Ganna , Pushkar Oleg 
Published: July 2023

The objects of research reported here were cables based on twisted pairs of various designs. The issue of the emergence of additional losses of electromagnetic energy is related to structural and technological inhomogeneities at the technological stage of cable production. The influence of the working capacitance of the twisted pair on the energy losses in the cables has been substantiated. A methodology was proposed for the numerical calculation of the electric field under the condition of ellipticity of the structural elements of the twisted pair. That has made it possible to determine the distortion of the electric field and the effect of inhomogeneities on the working capacitance of a twisted pair of different designs.
Specifically, it was shown that for shielded structures with continuous polymer insulation, the distortion of the electric field and the growth of the working capacitance are observed to a greater extent. The need to find technological solutions to reduce the effect of screen ellipticity on cable capacitance has been emphasized. The effectiveness of capacitance regulation in the presence of inhomogeneities has been confirmed, by using foamed insulation to reduce the loss of electromagnetic energy in the cable.
The effect of reducing the working capacitance and increasing additional losses under the simultaneous influence of the ellipticity of the electrical insulation and the protective polymer shell has been established, which necessitates the technological process adjustment in the manufacture of twisted pair.
An applied aspect of using the results is the possibility of improving the typical technological process of manufacturing twisted pairs to reduce additional losses of electromagnetic energy at the final technological stage of cable production.
The adequacy of the numerical studies was confirmed by experimental dependences of the attenuation coefficient and additional energy losses of the unshielded cable in the frequency range up to 100 MHz
Improving the oscillating wind turbine model
Authors: Shtanko Oleksandr , Litvinova Maryna , Zorina Iryna , Karpova Svitlana , Avdiunin Roman 
Published: July 2023

Disadvantages in the structure of the most common rotary wind generators limit their use. This motivates the development of alternative types of wind turbines, the most promising of which are oscillating wind generators.
The object of the study is the structure of an oscillating type wind generator, which provides self-oscillating movement of the blade-wing. The design of the wind generator uses a modified wing shape to provide maximum lift. For this purpose, added elements are the tip and flap, which affect the shape of the wing, its angle of attack, and regulate the direction of the lifting force. The principle of attaching the tip and flap to the wing using spiral springs has been developed. The structure also includes locking magnets that affect the movement of the wing during a turn. The mechanism that drives the self-oscillating mode of operation of the wind turbine was described. This mode occurs under the action of the inertial force of the movement of the wing, the force of elasticity, the repulsive force of the magnets, and the pressure force of the air flow.
A computer simulation of the wind generator was carried out using the Ansys CFX software package. The model of the flow around an absolutely rigid body at small values of the Reynolds number was applied. The resulting dynamics of the horizontal movement of the wing of the wind turbine make it possible to use it for energy generation already at a wind speed of 2 m/s. The low cost of the wing and the automatic regulation of its movement make it possible to install many wings to increase the power of the wind generator. Thus, the improved wind turbine is low-cost, harmless to birds, has self-regulation of wing movement and can use the low-speed component of the wind, which significantly expands the geography of its operation. It is possible to transfer the proposed technological solutions for the construction of hydroelectric generators
Development of a highly efficient plant for separating the peel from the pulp of melons
Authors: Zhumalieva Gulzhan , Chomanov Urishbai , Aktokalova Gulnara , Tultabayev Nurzhan , Kasymbek Rabiga , Tultabayev Mukhtar 
Published: July 2023

The object of study is the development of an installation for separating the peel of melon crops (watermelon, pumpkin) for their further processing. The peel of melons contains important compounds such as minerals, polyunsaturated fatty acids, tocopherols, polyphenols, carotenoids and phytosterols. The peel of watermelon and pumpkin make up a fairly significant proportion of the fruit, varying in watermelon from 15 % to 40 %, pumpkin 5‒20 %, of the total mass of various commercial varieties, which are usually discarded as by-products after commercial processing. Thus, the peel remains a massive by-product, the most important among agri-food waste, due to the content of natural antioxidants and various other nutrients in them. However, the industrial use of watermelon and pumpkin peel is complicated by the lack of an effective technique for separating melon crops from the peel. Therefore, research on the development of an installation for separating the peel of melons (watermelon, pumpkin) is relevant.
The developed installations for separating the pulp from the peel of melons have a number of disadvantages, Therefore, it seems relevant to develop an installation for separating the peel of melons.
The developed installation has a number of advantages in comparison with analogues. For example, low knife wear is ensured due to the fact that when cutting the fruit, the cutting force is distributed along the entire length of the knife. The simplicity of the design and reduced loads on the cutting tool, as well as the effective design of the knife in the form of a hemisphere ensures maximum removal of pulp from the peel
Improving the jelly plum juice technology by using secondary products of oil production
Authors: Lapytska Nadiia , Syza Olga , Gorodyska Olena , Savchenko Olesya , Rebenok Euvgene 
Published: July 2023

A significant issue related to using pectin-containing raw materials in the production of juices is the reduced yield of the finished product and the formation of a significant amount of waste. It is proposed to consider the possibility of using wheat germ meal and rosehip fruit meal to increase the yield of jelly plum juice by treating with pomace additives. The rich chemical composition of the proposed additives will enrich the juice with essential substances.
It has been experimentally established that in order to increase the yield of jelly plum juice fortified with meal, it is advisable to ferment the pomace for 60 and 90 minutes, followed by pressing. This technological method will make it possible to increase the output of the finished product by adding wheat germ meal, by 11.4–36.1 % and 29.2–45.2 %, respectively; when fortified with rosehip fruit meal, by 15.3–35.0 and 28.8–46.9 %, respectively. In both cases, this occurs due to the hydrolysis of substances in fruit cells: for a first meal – due to its significant enzymatic activity, for a second meal – due to its high acidity.
It has been proven that the high content of nutrients in the meal contributes to the enrichment of jelly plum juice with proteins, non-starch polysaccharides, and vitamin C.
It was established that in order to achieve high product quality, it is advisable to use wheat germ meal in the amount of 5 %, and rosehip fruit meal – 5–7 % in addition to the total weight of plums.
The data reported in this work could be of practical importance at canning industry enterprises. Owing to the proposed technological solutions, manufacturers will be able to increase the profitability of production, reduce the amount of waste that pollutes the environment, and obtain jelly plum juice of enhanced nutritional value with competitive quality indicators
Optimization of technological parameters in the production of cereal beverages fortified with Omega-3 polyunsaturated fatty acids
Authors: Khastayeva Aigerim , Bekturganova Almira , Omaraliyeva Aigul , Serikov Almas , Myrzhykbayeva Aidana 
Published: July 2023

The object of this study was cereal drinks fortified with Omega-3 polyunsaturated fatty acids: rice (product 1), oat (product 2), buckwheat (product 3). The purpose of the research was to optimize technological parameters in the production of such beverages.
A mathematical model was built in the form of three regression equations describing the influence of grinding size (K), roasting temperature (Т), and roasting duration (t) on three output variables: oat, buckwheat, and rice protein content. Statistical analysis of the obtained equations showed that they are adequate in the selected area of planning: K=0.66–2.34 mm, T=133–217 °С, t=3.3–11.7 min.
Studies were conducted to determine quality indicators, chemical composition, biological and nutritional value of the developed cereal drinks, in comparison with the control version.
It has been established that the content of fatty acid composition of cereal drinks differs markedly. The minimum share of saturated fatty acids was established in product No. 3, without fortification – 10.43 %. The content of polyunsaturated fatty acids ranged from 82.09 % (product 1) to 89.57 % (product 3). The highest omega-3 content was found in product 2, with fortification – 1.34 %, and the lowest – in product 1, without fortification – 0.27 %.
The introduction of a filler in cereal drinks made it possible to add protein, thereby increasing the biological value. According to the content of essential amino acids, the devised product is characterized by a high content of essential amino acids, exceeding the FAO/WHO ideal protein scale, which allows us to draw a conclusion about the high biological value of the developed product.
The analysis of the mathematical model built established that an increase in the coarseness of grinding leads to a decrease in the protein content in the entire investigated range of values of this factor
Identifying the influence of technological factors on the structure and properties of contact wire from secondary copper
Authors: Petrovs'ky Ruslan , Verkhovliuk Anatolii 
Published: July 2023

This paper reports the analysis of studies on the use of secondary copper for the production of articles based on it, namely the contact wire for electric transport.
The effect of the drawing step on the macro- and microstructure and physical and mechanical properties of the copper wire was studied. The optimal draw pitch for continuous copper casting is 8.2 mm. At a temperature of the melt (casting) of 1200 °C and a draw step of 8.2 mm, the average crystallization rate is ~300 °C/s. This provides sufficient time for crystallization, and with such parameters, the heat transfer from the metal receiver does not have a noticeable effect on the structure. At the same time, it was established that Mg is a modifier for liquid Cu while all other elements do not have such an effect and form solid solutions with copper.
It is shown that the increase in the concentration of silver from 0.082 at% to 0.092 at% led to an increase in specific electrical resistance by 0.582 %. As for other elements, namely, iron, the change in its amount from 0.002 at% to 0.005 at% increased the specific resistance of copper by 1.733 %. The change in nickel concentration from 0.024 at% to 0.036 at% and tin from 0.0010 at% to 0.0035 at% led to its growth by 2.927 % and 1.269 %, respectively
Building models to optimize vehicle downtime in multimodal transportation
Authors: Razghonov Serhii , Lesnikova Iryna , Kuznetsov Vitalii , Kuzmenko Albina , Khalipova Nataliіa , Chernikov Danylo , Zvonarova Olha , Prokhorchenko Halyna , Horulia Mykola , Bekh Petro 
Published: July 2023

Sustainable development has become the main focus of transport policy and planning around the world. One of the practical goals when performing multimodal transportation is the optimization of logistics costs. That is, the object of research is the process of multimodal transportation. Empirical research shows that the problem of optimization of transportation costs can be solved by different methods. But the result will be similar. In the given approach, only one component of the transportation process is subject to optimization, which is the overload time. The solutions are based on the method of mass service theory and the method based on fuzzy logic. With the help of these methods, based on practical data, time parameters were calculated that characterize overloading from railway transport to road transport. The application of the method of a weakly formalized process in relation to transport logistics was considered, taking into account not only quantitative estimates but also qualitative, vaguely defined criteria that do not lend themselves to formalization, and the relationships between them. The model was developed for further research of this process, prediction of its behavior, optimization of functioning. It is based on the technology of fuzzy sets. The results obtained using the agent model based on the mass service network and the model based on fuzzy logic differ within the permissible specified limits of no more than 5–7 %. The application of fuzzy logic in the logistics of multimodal transportation is relevant and gives the best results compared to traditional methods of the theory of mass service systems. The article includes comparisons that reflect the advantages of the proposed approach. The obtained results are of a practical nature and can be used to make a decision on choosing a route and/or when transferring from one mode of transport to another