The paper considers the bioreactor for cultivation of Chlorella microalgae. The indicators of the process quality and the description of the bioreactor design are given. The computation of the transfer function of the system to maintain the temperature of water in the main tank by the method of Rotach is calculated

Keywords: automation, bioreactor, biotechnology, Chlorella, system of regulation, transfer function calculation, Rotach method

The outlines of the composition of intelligent models for the assessment of complex risks, consisting of a ways of extracting and formalizing knowledge based on an ontological model, intelligent models for evaluating the process, structural and system aspects of risks are determined. A method of forming a composition of models for the assessment of complex risks, based on the decomposition of the problem of risk assessment into separate requirements, is proposed. The boundaries of the participation of subject matter specialists and / or risk management specialists in setting up, training, adapting and assembling both individual intellectual models and their composition as a whole are determined.

Keywords: intelligent models, risk management, intelligent model composition, ontological model

The paper discusses the main trends in the development of information technologies in the housing and utilities sector. The main direction of development of energy and water accounting systems is energy efficiency, which is achieved either through the materials used or through constructive solutions. Automated systems for commercial accounting of energy resources (AMR) allow you to combine disparate data from metering devices and transfer them to information processing centers. The use of AMR allows you to keep records of consumed resources, monitor leaks and losses, accumulate data for further processing and forecasting, as well as generate data arrays for the application of BigData technology and neural networks. In Russia, the data collector is the GIS utilities system. In the future, ASCME will become part of the organizational and technical concept of Industry 4.0.

Keywords: measuring circuits, metering devices, Internet of Things, AMR, BigData, neural network

The system analysis of types of damage of logging machines and their damage during operation is carried out. It is found that a significant impact on the machines reliability has mechanical energy and thermal energy. Mechanical energy affects all components and parts in the form of static and dynamic loads, which leads to the wear of mates, the emergence and development of fatigue cracks, plastic deformation or quasi-brittle fracture. The main attention is paid to the consideration of the influence of low temperatures in the operation of forest machines in winter on the properties of metals and, consequently, on the level of their reliability. It is recommended to use more widely such characteristic of materials as fracture toughness to assess the reliability of the design.

Keywords: Logging machine, reliability, damage, operating conditions, low temperature, fracture toughness

The scientific interest, which is represented by research for concretes differing in strength characteristics, is substantiated. A series of large-scale experimental studies has been carried out to establish the nature of the change in the properties of heavy concrete manufactured by various methods, depending on the reinforcement by different types of dispersed fibers. At this stage of the study, in order to systematize the accumulated experimental data, the authors molded and examined products made of concrete of class B35, manufactured by vibration and centrifugation, with subsequent reduction to uniformity for the convenience of an analytical comparison of the results obtained. The compressive strength and tensile strength, as well as their increments, depending on the type of reinforcing fiber-polypropylene, basalt or steel fiber, were studied. The influence on the properties of the investigated concrete of class B35 on the combination of various prescription and technological factors has been established.

Keywords: centrifuged concrete, vibrated concrete, thin-walled reinforced concrete products, fiber reinforcement, polypropylene fiber, basalt fiber, steel fiber, compressive strength, tensile strength

The dependence of the values characterizing the propagation of nonlinear waves on the surface of a liquid conductor on the electric field strength and on the wavelength is described. Electrohydrodynamic waves are investigated, namely, the motion of drops, convective motion of liquid, deformation of drops and bubbles in the applied electric field, propagation of surface waves in a linear approximation are considered. A mathematical model of nonlinear wave propagation on the charged surface of a liquid conductor is constructed. The graphs of the dependence of the wave oscillation frequency on the electric field strength and phase velocity on the wavelength are plotted.

Keywords: nonlinear surface waves, liquid conductor, dielectric constant, phase velocity, magnetic field strength, surface charge

The differential thermal analysis (DTA) necessary for the study of structural changes in dispersed silica – flask occurring at elevated temperatures is carried out. A comparative analysis of the results of electromicroscopic studies, showing the dependence of the structure of the surface of the flask on the temperature treatment. It is considered that the defining characteristic of the natural sorbent-flask in the process of wastewater treatment is its specific surface area and porous structure. The influence of calcination temperatures on the adsorption properties of the natural mineral – flask is considered.

Keywords: adsorbent, dispersed silica, differential thermal analysis, flask, adsorption properties, waste water, calcination, purification, temperature, adsorption

The article presents the concept of creating automation systems for three types of low-power power plants with a fluidized bed. A review of coal combustion technologies in the high-temperature and low-temperature fluidized bed was made. The characteristic of functional and technological features of the working processes of low-power boilers with furnaces of high-temperature fluidized bed is given, with the formulation of the main conceptual provisions defining the basic principles of building automation systems

Keywords: high-temperature fluidized bed, low-temperature fluidized bed, active boiler utilizer, conceptual position, automation

This article presents the results of an experimental study and evaluation of the application of a method for optimizing fuel use by the ratio of the power of a boiler unit in a block-modular boiler house and setting the power of a burner on the combustion steps. As a result of the study, the criteria for the application of this method to the existing block-modular boiler house, the factors having the greatest influence on the efficiency of the boiler units are determined.

Keywords: heat transfer intensification, optimization of fuel use, cogeneration mode, energy production, combustion mode, boiler, condensation, gas flow turbulization, waste heat boiler

An overview of the current state of the design of building objects is presented, and the possibilities for improving its quality are described based on the AutoCAD computer-aided design system, the development of which begins at the university level. Describes the sequence of building a plan for a one-story building using AutoCAD.

Keywords: Construction, design, project documentation, drawings, AutoCAD, engineering and computer graphics

The article considers a number of proposals aimed at improving the efficiency of the design, training and operation of neural network models within the framework of control systems for complex objects. This includes: organization of processing of networks of large dimenstionality; development of neuroevolutionary procedures; providing opportunities for the formation of neural network models in a single cycle of designing automated systems. The hierarchical construction of network structures is considered as an apparatus that provids work with network models of high dimensionality. At the same time, unlike the traditional approach associated with cutting the graph of an already synthesized model, the article proposes procedures for synthesizing a generalized model from structural elements. The formal descriptions of structural synthesis introduced in the article can serve as a basis for organizing software and hardware interfaces of the forming models. The formation of such neural network structures within control systems is associated with the proposed and described concept of neural network regulators as the basic elements of building intelligent automated systems. The article also examines and describes as a neuroelement a model of a dynamic neuron with a state memory, allowing to implement the mechanism of self-evolutionary development of the network directly in the course of its operation.

Keywords: control / management system, dynamic neuron, neural network model, hierarchical structure, self-evolution mechanism

The article is devoted to the study of the impact of information technology on the organization of labor protection. The applied significance of the research is that modern approaches to the organization of labor protection imply a wide use of information technologies. Informational support of labor protection is an important part of a systematic approach to ensuring safety, improving working conditions and reducing occupational risks. The paper describes the economic efficiency of creating an information and analytical system for labor protection. In the course of the system research, the main functions were identified that should be implemented by the information system using modules. Considered 6 main objectives of the study.This work is relevant due to the fact that the results of the study can be used in higher education institutions to optimize their work. The author analyzed the result of the study, noting the importance of introducing an information and analytical system for labor protection in connection with its practical and economic feasibility for higher education institutions with a large number of employees and, consequently, with a large amount of information that needs daily processing and analysis.

Keywords: information and analytical system, labor protection, module, injuries, social policy, information technologies

The article discusses the comparison of polyethylene and steel pipelines. The definition of coefficient of temperature linear expansion for polyethylene pipelines is given. The analysis of existing methods to determine the linear dimensions of compensators and their compensating ability was carried out. The analysis of the obtained dependences showed that the calculated compensating ability, in some cases, exceeds the geometric dimensions of the compensator. The method for determining the compensating ability is determined.

Keywords: coefficient of temperature linear expansion, linear size of the compensator, polyethylene pipe, compensating ability

The article discusses structural membranes as modern building materials used to form the facades of buildings and structures. Paper give their detailed characteristics, physico-chemical properties and conditions of use. Two types of composite material from which the membranes are made are described: textiles and foil, their components, individual characteristics, method of manufacture. Further examples of specific modern buildings facades analyzed performance properties of membranes isolated main advantages and disadvantages of this technology. In conclusion, the authors, on the basis of the research done, conclude about the advantages of using this material in the construction industry, as well as express their assumption about the development and new possibilities of its practical application.

Keywords: Architecture, facade, structural building membrane, material

The article deals with the problem of the functional state of the bridge park in Russia. The statistics of the number of bridges, newly built bridges. Attention is focused on the inconsistency of old bridges with modern regulatory requirements for safety, carrying capacity, and carrying capacity. Noted on the relevance of flood impact on bridges and roads. The causes of occurrence are described. The problem of flood forecasting is highlighted. Examples of accidents of bridge structures from the effects of water flow are given: sediment, roll of supports and abutments, erosion of the embankment approach. Based on the situation in the city of Chita, the statistics of the frequency of flooding in different years are given, the critical levels of these disasters are indicated, and statistics on the consequences of the impact of the flood is given. The impact of the normative water flow is considered, and it is proposed to analyze the effect of the excess flow arising from the maximum level of bottling. Presents the results of calculations for which comparisons are made of various approaches to determine the depth of erosion of the channel.

Keywords: bridges, flood impact, safety, bridge destruction, regulatory documents, erosion depth, water flow