The influence of the content of the zeolite component in the composition of cobalt catalysts for the synthesis of hydrocarbons on their physico-chemical properties is investigated. The catalysts were obtained by impregnation of a zeolite-containing carrier with subsequent heat treatment. The obtained samples with a concentration of ZVM zeolite of 30-70% were characterized by the methods of BET, TPR, TPD H2. The results of the analysis show that an increase in the concentration of the zeolite component of the catalyst contributes to an increase in the specific surface area, dispersion and a decrease in the recovery temperature of the deposited cobalt.

Keywords: applied catalyst, cobalt, zeolite, dispersion, specific surface area, active component, synthetic fuel, degree of reduction

The article presents the results of a study of the photoelectric response of cobalt-containing ferroelectric ceramics (1-x)Ва0.95Pb0.05TiO3+xCo2O3, synthesized at the Institute of Solid State Physics of the University of Latvia using conventional ceramic technology. Ceramics was exposed to optical radiation at room temperature. Before applying light radiation to the cellular electrode of the ceramic sample located in the measuring cell, zero current was recorded for 0.5 minutes in the absence of illumination using a high sensitivity digital electrometer. Then, the photoresponse was recorded during the time until its value remained constant (since the anomalous photovoltaic effect manifests itself in the form of constant currents flowing along the polar directions) and only then the light flux was turned off. A significant effect of the concentration of cobalt oxide on the value of the photovoltaic current is shown, which manifests itself in a decrease in the value of the stationary current with an increase in the content of the impurity of cobalt oxide. It is assumed that a possible reason for the decrease in the stationary current is deep charge traps, which is due to an increase in the cobalt concentration in the ceramic. The influence of the incident radiation wavelength, as well as the aging factor on the photoelectric response for ceramics with the highest concentration of cobalt oxide, is established.

Keywords: mobile robots, polarization, depolarization, ferroelectrics, polarization current, remanent polarization, dielectric losses, electrical load, domain structure, electrical breakdown, mechanical failure

The article presents the results of a study of the physicochemical and catalytic properties of cobalt catalysts on a mixed zeolite-containing carrier. Samples of catalysts containing 10% cobalt and from 30 to 70% high-silica zeolite ZVM were prepared by impregnation with subsequent heat treatment. Methods of IR spectroscopy, scanning electron microscopy (SEM) in combination with energy dispersion analysis (EMF) were used to study the physicochemical properties of catalysts. The catalytic properties were studied in a reactor with a fixed layer at a temperature of 240 °C, a pressure of 20 MPa, a volumetric gas velocity (OSG) of 1000 h-1, H2 / CO = 2. As a result of IR spectroscopy, the presence of Si-O, Al–OH, Co–O, etc. functional groups was detected, SEM–EMF images confirmed the uniform distribution of cobalt on the surface of catalysts. The dependences of the catalytic characteristics depending on the content of zeolite were established, the maximum activity was recorded for a sample containing 70% of ZVM zeolite.

Keywords: catalysts, Fischer-Tropsch synthesis, cobalt, zeolite, carrier, IR spectroscopy

A computer simulator for training operators of the technological process of granulating ammophos in a drum granulator dryer is considered. The technological object and the requirements for controlling the granulation process are briefly described. The functions of the simulator, the structure of its mathematical and algorithmic support are given. The software implementation of the simulator is made in the Visual Basic environment.

Keywords: computer simulator, mathematical model, algorithmic support, training of process operators, pelletizing, drum granulator dryer, granule diameter, ammophos pulp

The results of the analysis of leakage currents as a function of time in samples of polycrystalline ferroelectric ceramics solid solutions of lead titanate-zirconate with sodium and bismuth impurities under the condition of applying a constant electric field are presented. We considered batches of samples that were stored in different conditions, which led to the formation of two batches - standard and defective. The samples of the standard and defective batches differed in values of the dielectric loss tangent by several times, while other electrophysical parameters practically did not differ. To measure the patterns of current fluctuations with time in the sample, a modernized Mertz scheme was used. The electric field was changed stepwise on the sample. Current fluctuations at a constant voltage across the sample were measured during the establishment of a constant leakage current and were considered as a time series, allowing only a statistical description. Changes in the form of the dependence of the leakage current on time are determined with an increase in the electric field strength on samples with different values of the loss tangent. The exponential decline is accompanied by random jumps in the magnitude of the leakage current. It is assumed that at a higher voltage, the state of the domain regions stabilizes, resulting in current leakage under a depolarizing field, since the domain system retains its more rigid configuration.

Keywords: mobile robots, polarization, depolarization, ferroelectrics, polarization current, remanent polarization, dielectric losses, electrical load, domain structure, electrical breakdown, mechanical failure

The paper presents the results of experimental studies on increasing the settling rate and reducing the solid phase in the clarified layer during settling of a solution of sulfuric acid leaching of heavy metals from galvanic sludge. For this purpose, it is proposed to use a monoethanolamine vinyl ester copolymer with sodium or potassium methacrylate as a flocculant. This flocculant works well in a wide range of pH of the solution medium, unlike the well-known and widely used polyacrylamide flocculant. The increase in the efficiency of settling is achieved due to the fact that the flocculant in question makes it possible to simultaneously flocculate positively and negatively charged particles due to the presence of various functional groups in its composition. The use of the proposed flocculant will ensure a more complete extraction of heavy metals from galvanic sludge, which reduces the risk of environmental pollution and their reuse in industry.

Keywords: galvanic sludge, heavy metals, leaching, flocculant, settling, suspended solids

The influence of redispersible polymer powders on the change in the properties of building mortars after holding at high temperature in accordance with GOST R 56387-2018 has been studied. An increase in the compressive strength by 10 – 15% was revealed at a dosage of RPP 2 – 3%. It was found that the introduction of an air-entrapping admixture into the composition has a negligible, up to 5%, negative effect on increasing the compressive strength. The increase in the flexural strength after holding at high temperature was 1.5 – 1.8 times. The decrease in the E-modulus practically does not depend on the dosage of RPP. After holding at high temperature, the E-modulus was 0.8 – 0.84 relative to normal hardening conditions. A decrease in the adhesion strength to the concrete base to values of 0.39 – 0.71 relative to normal hardening conditions was revealed. It is noted that the decrease in adhesion strength significantly depends on prescription factors, with the exception of formulations containing an air-entrapping additive, in which there is practically no decrease in adhesion strength after holding at high temperature.

Keywords: redispersible polymer powders, adhesion strength, E-modulus, compressive and flexural strength, high temperature

The article examines the issue of calculating the depth of compression stresses when using a spherical indenter in order to increase the fatigue strength of steel parts. When the spherical indenter is pressed, elastic deformation of the surface first occurs, and then plastic one. The residual plastic deformation is expressed in the size of the print. The physicomechanical properties of the processed material are not taken into account, the process of pressing a spherical indenter into a steel sample in the ANSYS program is modeled by the final element analysis (FEA).A bilinear deformation diagram was fed, which is set in the program by the modulus of elasticity, yield strength and Poisson's ratio. At the next stage, a finite element grid was generated by using the Hex Dominant Method, which divided the model into elements in the form of hexahedra of various sizes. In the contact area, the size of the finite elements was 0.2 mm. The results of calculations of analytical and numerical methods for spherical indenter diameters of 4, 6, 8, 10 mm and various degrees of plastic deformation to determine the depth of compression stresses are presented, compared with known data, the error is calculated. A dependence is derived for a preliminary assessment of the occurrence of residual stresses depending on the diameter of the well after the indentation of the spherical indenter.

Keywords: spherical indenter, bilinear deformation diagram, plastic deformation, indentation depth, compression stress

The paper considers the features of customs operations and customs clearance, both in the pre-sanction period and during the period of sanctions, on the part of foreign states, when importing goods into the Russian Federation.

Keywords: customs administration, Eurasian Economic Union, foreign economic activity, import of goods, export of goods, sanction, customs procedure, customs control, customs authority, customs operation, customs declaration

Software algorithms for a microprocessor device for active control of the grinding process of bearing rings have been developed.

Keywords: grinding, active control, microcontroller, active control device, active control device software

The development of cyber intelligence as a new way of detecting information (information technology) objects in cyberspace is considered, its relationship with the OSI network model is shown, the development of cyber intelligence systems in everyday conditions is determined. Models of information technology object detection systems in the conditions of a complex electronic environment in the information space are presented.

Keywords: cyber intelligence, classification, cyberspace, detection, information and technical objects

The article discusses the use of cybernetic space for the detection of n-dimensional information technology objects and their subsequent identification. A conceptual model of a multidimensional intelligence and search system is presented, the intelligence cycle of searching for information and technical objects is described, as well as the relationship of radio intelligence with cybernetic intelligence.

Keywords: identification, information technology object, infosphere, cyberspace, detection, intelligence, intelligence cycle, recognizing

Currently, special attention is paid to ensuring a high level of convenience and road safety. It is impossible to achieve this result without a clear understanding of the expediency of using certain theoretical provisions in practice. The solution to this problem lies in the timely development of simulation algorithms that allow us to accurately assess the effectiveness of applied engineering solutions in the project documentation.

Keywords: Parking, vehicle, capacity, road network, speed, traffic safety

The analysis carried out in the article showed that the sacred architecture of Ingushetia is represented not by separate objects, but by sacred complexes, which always include three objects of worship, corresponding to the triune deity appearing in three persons: the main male deity, the secondary male deity and the female deity. The second conclusion related to the first, all sacred complexes of Ingushetia can be attributed to Christian architecture. Four groups of sacred complexes were identified: the temple of Thaba-Erda, general atronymic significance, patronymic significance, generic complexes. The last two groups are discussed in detail. It was revealed that sacred complexes reflect the processes of nativization of Christianity, both in the interaction of Christian and pagan mythology, and in the deification of the nature of a particular place. The architecture of each object individually may seem primitive, but the architecture of the entire complex as a whole, including the path from object to object, views of the surrounding space of mountains and gorges, a system of sacred trees and stones along this path, the movement of the sun is a unique phenomenon.

Keywords: medieval architecture of Ingushetia, sacred complexes, traditional cultures, nativization of Christian culture

The article is devoted to a comparative analysis of the architectural features of the sacred complexes of Galgai-che of the XIII-XIV centuries. on the territory of Ingushetia. In the context of the natural-spatial arrangement, the manifestations of religious contamination in the spatial organization and external forms of "folk" temples are considered. The originality of the options for "folk" temple building was revealed. The peculiarities of temples characteristic of late Nestorianism were revealed. This method is used for the first time to study the sacred complexes of Ingushetia. The scientific novelty of the article is due to the fact that a comprehensive study of planning, space-dimensional solutions and construction equipment of churches allows us to confirm their dating and attribution, to establish the chronological proximity of the monuments.

Keywords: Folk temple building, architecture of the Middle Ages, traditional architecture of the Vainakhs