This work presents the results of modeling the process of lithium adsorption on the surface of a pristine/defective grapheme sheet 4x4. The study was carried out using the method of computer simulation in the Materials Studio software. The calculations were performed at different degrees of adatom coverage of the graphene surface to determine the effect of these structural changes on the energy and electrochemical characteristics of the presented systems. The work presents models of the studied objects, as well as tables characterizing the energy of adsorption and the magnitude of the transferred charge of Li-C at the smallest distance between the adsorbate and the carbon atom. According to the results of the study, the maximum value of the theoretical specific capacity was 332,727 mAh/g.

The work is devoted to the study of convolutional neural networks for use in the classification of modulated radio signals. Automatic classification of modulation signals has a wide variety of wireless applications. Also shown are modulated radio signals at different SNR levels. In this work, we used data from the DeepSig base of radio modulated signals, created using GNU Radio. Based on this, the classification of modulation using the latest generation convolutional neural networks is considered. The work shows graphs of dependences showing the accuracy of training the network, as well as matrices of inaccuracies with various types of modulated radio signals. It is shown that convolutional neural networks of the latest generation are the most suitable for solving this problem, since they have the ability to quickly learn and accurately determine.

This article presents photometric studies of the cataclysmic variable 2MASS J02253615+2805508, which belongs to nova-like. The light curve is modeled based on the fact that the binary system consists of a primary and secondary star, an accretion material flow, an accretion disk, and a hot spot on its edge. Taking into account the distance to the star taken from the results of the Gaia mission, equal to d=315 (5) pc, some system parameters are obtained, such as the inclination of the system i=77.2°, the masses of the primary and secondary stars, M1= 0.70 Mʘ and M2=0.42 Mʘ, respectively, the radius of the accretion disk Rdisk= 0.58 Rʘ.

The article presents two main problems of integral calculus in their applied aspect, which arouse a lively and continuing interest shown by mathematicians and engineers. The question of the origin of integral calculus is considered, using the example of the problem of calculating areas and the problem of calculating primordial ones. These problems led to two branches of the integral calculus: the theory of definite integrals and the theory of indefinite integrals. Integral calculus is one of the most difficult topics of mathematical analysis, since the process of calculating integrals in general does not lend itself to formal systematization, at the same time it is a powerful tool for solving applied problems. The relevance of the article is primarily in the content disclosure of the basic concepts of the elements of mathematical analysis, in the need for appropriate mathematical support for other disciplines, since the practical application of the integral is mainly used in physics and engineering, as well as in finding the volumes of geometric bodies and in calculating the areas of various shapes. The article is interesting from the point of view of increasing motivation to study higher mathematics in technical specialties. Thus, knowledge of the connection of integral calculus with the needs of practice is necessary for deep assimilation of the theory, the development of specific mathematical thinking, and instilling interest in mathematical disciplines.

The radiative relaxations of self-trapped excitons with a maximum at 2.8 eV in the sodium field are experimentally demonstrated in KCl-Na crystal – at direct optical creation of a near-sodium exciton with a photon energy of 7.62 eV, at electron-hole recombination in the process of X-ray excitation in the temperature range from 150 K to 300 K , as well as electron-hole recombination at optical stimulation in F/ - centers spectrum region (1.5 eV) at 90 K in crystal, pre-irradiated by X. The increase in the radiation intensity at 2.8 eV of KCl-Na crystal at X-ray excitation in the temperature range from 150 K to 300 K, when all exciton-like radiation is quenched, is interpreted by increasing the free path of the unrelaxed hole from 60 а to 600 а, where a is the lattice constant. Thus, in KCl-Na crystal, unique possibilities of self-trapped electronic excitation creation in the field of a light sodium ion are experimentally realized by three mechanisms – exciton, hole-electron recombination, and electron-hole recombination, the radiative relaxation of which ends by luminescence with a maximum at 2.8 eV.

With an increase in the amount of information, the problems associated with large amounts of data are aggravated, which in the future require the implementation of storage, transfer or processing processes. Working with large volumes of files significantly complicates these processes, and therefore there is a need for the existence of algorithms that allow compressing the volumes of files to the required size, acceptable for their efficient processing. Hash functions play an important role in the process of interacting with files. The use of hash functions implies the transformation of the original data according to a certain algorithm into a sequence of fixed length. This allows you to significantly speed up the search among a large number of files to view, modify or delete, to compare files, to verify immutability in cases where the data should not be changed by unauthorized persons. Thus, hashing is used in all areas where the question of storing, transmitting or processing data in the form of files arises, namely in cryptography, computer graphics, when organizing data on a computer and on the Internet.

onlinear partial differential equations are widely used as models to describe physical phenomena in various fields of sciences such as fluid mechanics, solid-state physics, plasma physics, chemical physics, condensed matter physics, optical fibers, biology, and geochemistry. One of the nonlinear partial differential equations is the complex modified Korteweg-de Vries equation. This equation has been proposed as a model for the nonlinear evolution of plasma waves and is the physical model that incorporates the propagation of transverse waves in a molecular chain model, and in a generalized elastic solid. In this paper, we study the T-symmetry nonlocal complex modified Korteweg-de Vries system of equations. This nonlocal system is obtained by Ablowitz-Musslimani type of reduction and is respectively T-symmetric nonlocal cmKdV system of equations. The Ablowitz - Musslimani type of reductions arises from remarkably simple symmetry reductions of general AKNS scattering problems. The method of the Darboux transformation is applied to obtain exact solutions.

In the presented scientific article, the researchers consider the experience of using laser-scanning technology, which makes it possible to shoot architectural, historical objects with the preservation of all elements and geometric parameters in electronic format. In order to minimize errors, optimize and speed up work, designers increasingly turn to laser scanning organizations for help. This allows you to get away from traditional measurements and get point clouds of any building with an accuracy of 1 mm. Modern technology of laser scanning of shooting objects, which has already shown its effectiveness in the reconstruction of industrial facilities, in architecture, construction, mining and a number of other areas. It is important to note that the scanner allows you to quickly perform detailed three-dimensional surveying in a substantially automated mode, which minimizes the operator's influence on the field work process.

In this article, the tasks and problems of destruction of the shoreline of the lake and the analysis of possible causes of collapse and erosion of the coast, and recommendations for the development of strengthening measures of the shore of Lake Alakol are considered. The anthropogenic factor, as a rule, has a negative impact that destabilizes the processes of self-regulation of the natural environment. In some cases at loads, exceeding critical, intensive influences lead to full irreversible infringement of processes of self-regulation of the river systems and as a result - to their destruction. The critical situation for Lake Alakol has come, probably, in the last two centuries. The advancing waters of Lake Alakol have blocked the pebble beaches and began to destroy the shore, thereby bringing harm to human life activities. The bijection, lithology, and geo geography of the device are not possible in this case. The following table describes the results of the anthropogenic treatment and the geological and geophysical studies of the device.

Hydroelectric resources of small rivers in many regions of our country are very large, the solution of technical issues related to their use is considered, as a rule, from the point of view of comprehensive and rational development of the potential of water flows. For the rational formation of the mode of operation of small hydroelectric power plants, it is necessary to determine the value of its main energy indicators and the value of its change, taking into account the climatic factors of the region in which it is operated. Like any other method of generating electricity by pulverized hydroelectric power plants, it has certain advantages and disadvantages, so the design of these issues needs to be taken into account when carrying out work. The general problems of small hydropower in foreign countries are caused by insufficient research of the hydrological regime and flow of small watercourses and the lack of mass production of equipment. Therefore, in order to prepare the project, it is necessary to determine in advance the relevant technical measures, and these issues were resolved in the preparation work.