The article presents the results of a study of the deflections of a monolithic flat floor with a different grid of columns with prestressed reinforcement without adhesion to concrete. To analyze the deflections, numerical studies of slabs with different rectangular columns and thicknesses were performed. The studies were performed using the LIRA CAD software package. The aspect ratio of rectangular cells of monolithic flat floors is determined, for which the application of prestressing is ineffective on the short side of the cell or most effective on the long side. It was revealed that the use of high-strength reinforcement of the "monostrand" type is most effective for a grid of columns 5x9m from the volume of the studied cell sides. It was found that the application of post-tension on the short side of the slab cell practically does not affect the total deflection of the cell - with the aspect ratio a / b> 1.2. The conclusion is drawn about the increase in the efficiency of using contour reinforcement with an increase in the deflections that affect the amount of rope repulsion. The results can be used in the design of slabs using prestressed reinforcement without adhesion to concrete of the "monostrand" type.

Keywords: rope, high-strength reinforcement, finite element, monostrand, repulse, prestressing, post-stressing, deflection

The article presents a program of comprehensive construction and technical expertise of the structures of an industrial building. The features of the construction and technical expertise of the structures of the agricultural warehouse of mineral fertilizers are described. An algorithm of the sequence of actions for the technical expertise of the structures of the object is developed. Measures have been developed to repair and restore the working condition of damaged structures

Keywords: construction and technical expertise, defects, bearing capacity, structural repair, property management

The publication is devoted to the task of developing a demo-genetic model of the adaptation of pests to transgenic and hybrid agricultural crops, taking into account the type of taxis. An assumption is introduced that the dynamics of hybrid agricultural crops can be investigated using demo-genetic models. A description of the problem is given in accordance with the characteristics of the growth of biomass of agricultural crops and the dynamics of pests, as well as taxis species. The modeling of the processes of fast and slow taxis depending on the behavior of pests at a particular point in time is described in detail, taking into account the type of their genotypes that affect the acquisition of mutations. The paper describes the features of the physiological structure and life cycle of insect pests, affecting the prediction of their spatial concentration and, accordingly, the prediction of productivity; the possibilities of their application in mathematical modeling.

Keywords: demo-genetic model, taxis, transgenic agriculture, hybrid, pest, biomass, diffusion

The reliability of the solar heating system with solar collectors was studied using the logical-probabilistic method by building a fault tree. The fault tree was obtained by sequentially detailing the events associated with failures of the solar heating system, as well as its elements. Events were taken into account: conducting test diagnostics of elements of the power supply system, repairing failed elements, failure of elements, reducing the power of solar collectors due to a decrease in the intensity of the solar radiation. The events were divided into two groups: events in which there is sufficient intensity of solar radiation for the hot water supply from the solar collectors, as well as events when the heating supply cannot be provided only due to the solar collectors. The last group of events was divided into two subgroups, within events caused short-term downtimes (at the time of switching) and long-term downtimes (at the time of replacing or repairing a failed system element). Long shutdowns are associated with the coincidence of failures, repair or diagnosis of one or more elements of the solar heating system. Expressions are compiled to calculate the probability of long downtimes, the probability of short downtimes, the probability of failure due to a decrease in the intensity of the solar radiation, and the total probability of failures. As a result of substituting the values of the reliability indicators of the elements of the solar heating system, the value of the total probability of failure during the year is 4.03∙10-5.

Keywords: solar hot water supply, reliability, solar collector, failure cause, reliability modeling

The object of the research, the result of which is the presented work, is a comprehensive system of spatial data of the railway infrastructure, within which a high-precision system of coordinates of the Russian Railways has been created, and methods definition of normal heights in the Baltic Heights System 1977. The strategy and prospects for the development of high-speed transport highways (VSM) have been described. Methods for determining normal heights at research sites are given.

Keywords: Global navigation satellite systems (GNSS), GLONASS, high-speed highway (Navy), high-precision coordinate system (WCC), altitude system, quasi-geoid

To date, the socio-economic situation in the country creates for the population quite significant obstacles in the implementation of tasks for the purchase of housing and other real estate through mortgage lending. However, when it comes to collecting the amounts owed on the loan, banks are faced with an analysis of the prospects for the sale of mortgaged property, as a result of which, in most cases, come to the conclusion that the original sale price of the mortgaged property with the realities of the market. In the article, the authors consider the judicial practice of determining the initial price of the mortgaged property and analyze the situation in which there is a need for judicial value examination, as well as give the main aspects of the methodology of this type of expertise. The purpose of the article is to form a clear idea of the reader about the process of resolving the dispute arising from the breach of obligations under the loan agreement.

Keywords: expert, forensic examination, subject of pledge, cost examination, assessment report, methodology

issues of optimization of the structure of the container pneumatic transport system are considered. The expediency of combining the functions of the equipment included in the transport system is shown. A functional diagram of a universal module that performs the functions of all blocks of a pneumatic transport system is presented. A block diagram of a microprocessor control system that provides the functioning of the mechanisms of a universal module is proposed.

Keywords: microprocessor system, pneumatic transport system, transport container, stations of the transport system, control algorithm, structure of the transport system, transport pipeline

One of the most complex structural elements of the building is the roof. It protects the building from the external environment: precipitation, temperature changes, solar radiation, wind effects, as well as from air pollution. The main element of the roof is the roof, as the condition of the roofing depends on the condition of the other elements of the roof and in this article will be considered modern building materials used in the device of roofs.

Keywords: roofing, roof, modern roofing, metal, profiled flooring, Ondulin, membranes, slate, tile

The Minsk Motor Plant D-245 engines are the most widely used in automobiles and tractor manufacturing in Russia and neighboring countries. These engines are installed on cars of the GAZ and MAZ family, PAZ buses, special equipment manufactured by Amkodor, MTZ tractors, etc. A turbocharger is one of the engines units affects power and environmental performance. The presence of a large number of engines under consideration makes it important for repair enterprises to improve the technological process of repairing turbochargers. A large number of technologies for repair rotor shaft of the turbocharger have been developed to date. However, there is no technology to restore the outer surface of the rotor seal sleeve after they touch the hole of the middle housing. The article presents the results of calculating the stress-strain state of the rotor shaft of a turbocharger, taking into account the installation of an additional (repair) part as a turbine seal sleeve. The analysis of the created solid-state model was carried out using of the SolidWorks Simulation system. The calculation was carried out at various shaft diameters for bearings. The study found that the voltage in dangerous sections of the rotor shaft with the installed repair sleeve is higher than without it. However, they are much lower than the permissible torsional stresses. Therefore, the probability of destruction of the rotor shaft during normal operation of the turbocharger, due to the occurrence of a resonance phenomenon, even with the minimum allowable diameter, will be very small. The presented data allow the use of this repair method to restore the operability of the rotor shaft of the TKR-6 turbocharger.

Keywords: engine, turbocharger, defect, repair technology, additional part, repair sleeve, stress-strain state, solid-state model, dangerous section, permissible stress

In this work, the author has compiled a list of requirements and corresponding indicators that must be taken into account in the process of creating the university timetable and estimates of the significance of each of these indicators are obtained. The task is to formulate directly the timetable formation procedure on the basis of the list of indicators and assessments of their importance. It is supposed to consider the possibility of solving this problem based on the use of its formalized model. To form a model, it is first necessary to formalize all the requirements from their list. There is considered an example of some of these requirements that briefly describe the procedure for their formalization.

Keywords: higher education institution, timetable, timetable requirements, formalization, initial data

Based on the processing of radar information from the radar network of the North Caucasus storm broadcasting, a filtering technique was proposed using complex information from several meteor radars.

Keywords: Radar, automation, refraction, identification, radar network

The paper describes a method for a measuring amplitude-frequency characteristics using a random broadband signal as a test signal. The results of an experimental verification of the proposed method are given, as the hardware implementation of the meter.

Keywords: measuring instrument amplitude-frequency characteristics, identification, Wiener-Hopf equation, discrete fourier transform

An algorithm for determining the lower confidence limit (NDH) for the minimum value of the hardness of a set of machine parts by calculation is developed. For processing of statistical data of the hardness measurements used a three-parameter Weibull distribution is offered. The transition from sample data to population data is carried out by the graphical method. According to the algorithm, NDH was found for the minimum hardness value with confidence probabilities p=0.9; 0.92;0.93;0.94.

Keywords: hardness, machine parts, sampling, aggregate, lower confidence limit, graphic method, calculation method

In this research the research problem of the liquid cooling system of supercomputer processors on nanomagnetic liquids by numerical modeling and the pilot study of processes of heat convection in the studied object is set. In article results of numerical modeling and the pilot study of process of the heat transfer are given in the heat exchanger of the liquid cooling system of supercomputer processors on the basis of nanomagnetic liquids, or ferroflyuid at influence of magnetic field impact assessment of magnetic field on the thermal resistance of the system and coefficient of heat convection the wall liquid Is made at different strengths of magnetic field. The numerical model of process of the heat transfer in the system the processor heat exchanger was investigated.

Keywords: processor, thermal resistance, Laplace equation, liquid computer cooling system, ferrofluid, nanomagnetic liquid, heat transfer, heat transfer coefficient

Dosing of various substances and materials are widely used in the chemical, petrochemical, food, medical, pharmaceutical, agro-industrial complex and other branches of science and technology. Research and development of new intellectual property objects, including those aimed at increasing the share of labor automation in this area, are actively conducted in many countries of the world. This determines the need for accelerated development of domestic technologies and equipment competitive in the Russian and foreign markets for automated dosing and packaging of various substances and materials, including liquid, bulk, puree, viscous and others. Based on a systematic patent information search, a systematic analysis of technologies, machines and equipment for dosing in industry, agriculture and the social sphere has been performed. A knowledge base has been compiled and systematized in the field of technologies and equipment for dosing in industry, agriculture and the social sphere. The results can be used to develop new technical solutions for improving equipment and technologies used in various fields of science and technology

Keywords: knowledge base, industrial dosing, intellectual property objects, patent search, system analysis