The results of research on the parametric optimization of a trapezoidal wooden truss with ascending braces on metal toothed plates are presented. A deterministic algorithm is developed and a program is developed that allows finding optimal farm parameters from the condition of minimizing the volume of wood, given the initial conditions. The optimum parameters for the farm span of 24 meters were determined for a given value of the external load, diagrams of the dependence of the objective function on the variable parameters.

Keywords: Parametric optimization, deterministic algorithm, metal toothed plate, trapezoidal farm with ascending bracing

The results of large-scale field experiments to study the interaction of the bases with different shapes and sizes of the protrusions at the bottom with an inhomogeneous loess foundation . It is shown that the protrusion at the base of a significant effect on the VAT base .

Keywords: foundation , stress, strain , stamp , eccentricity , mean pressure

The lasers working at mixture of helium and mercury vapors, and at mixture of neon and thallium vapors, in which the population inversion and laser oscillation are carried out on mercury ionic quantum transitions with the wavelengths of 615 nm and 794,5 nm, and on thallium ionic transitions with a wavelength of 594,9 nm and 695 nm are investigated.The conclusion is drawn about a similarity of pumping of ion quantum transitions of metals in the active media of ion gas discharge metal vapor lasers in plasma of transverse-type discharges: the hollow cathode discharge and a capacitive high-frequency discharge. The optimum discharge conditions from the point of view of obtaining the maximum laser output power have been experimentally found when using for pumping as transverse-type discharge with hollow cathode with high repetition rate of current pulses up to 100 kHz. The structure of 594,9 and 695nm thallium ionic laser lines caused by hyperfine and isotopic splitting of laser levels is investigated. The frequency intervals between components of 594,9nm laser line (45 GHz and 102 GHz) and of 695 nm line (35GHz) are measured

Keywords: ion metal vapor laser, high-frequency discharge, hollow-cathode discharge with high repetition rate of current pulses, optimum conditions for laser oscillation

In order to determine the prospects of the use of solar panels as a basis for the creation of the charger, you must know the several parameters: short circuit current, open circuit voltage, coefficient of efficiency and others. In this paper, these parameters are measured based on the results of research the current-voltage characteristics of the solar panels, resulting in an automatic mode with the use of a computer and a digital meter E7-20.

Keywords: Solar cell, solar panel, solar battery, power source, charger, current-voltage characteristic, coefficient of efficiency, LCR meter

This article provides information about the device for measurement of physical quantities of ferromagnetic materials. Discussed in detail and clearly shows the structure of the device.

Keywords: ferromagnetic materials, parameters, measuring device design, volumetric stressed state

In work on the basis of one of the methods of nonlinear acoustics (method of successive approximations) is considered environment as a set of orthogonal plane layers. The analysis is conducted with the division generated total field into components parallel and orthogonal to the direction of its propagation. It is recognized as the primary distribution field distribution along the longitudinal direction with the introduction of the aperture factor and orthogonal to the introduction of the cross-aperture factor. It determines the range of changes of the parameters for biological environments in the case of the nonlinear interaction of acoustic waves in them.

Keywords: nonlinear interaction, quadratic nonlinearity, different layered media, immersion method, transverse aperture factor.

The article discusses the possibilities of using forklift trucks (stacker-reach trucks) for mechanized installation of dividing walls, when cast-in-place slabs are assembled or manufactured. It is emphasized that in the early 1980s similar equipment that didn’t have a series production, was used in the construction of buildings by the lift-slab method. Some technical characteristics of the old equipment and modern warehouse equipment are compared, the advantages of the modern are revealed. It is noted that the simultaneous use of warehouse equipment on several floors of the erected frame building can lead to a significant reduction in the construction time. It is also indicated that the stacker-reach trucks used at the construction site are multifunctional, since they can not only transport construction cargo but also serve as an auxiliary equipment for safe work at a certain altitude when performing welding operations and fixing joints.

Keywords: precast and cast-in-situ frame building, mechanized installation of dividing walls, remote site, forklift truck, stacker-reach truck, working site

Air pollution in residential areas near industrial plants is one of the most significant problems of modern ecology. The resulting dust is one of the important factors in assessing the adverse impact on the environment. Studies show that the greatest danger to the human body is particles up to 10 microns in size. When analyzing the dispersion of dust in the residential and industrial areas, it is possible to estimate the percentage of particles PM10 and PM2.5 from the total amount that is necessary to effectively control the effects of dust on human health. The article gives a comparative analysis of the results of studies of the dispersion composition and dust concentration in the air of the working zone and the urban environment.

Keywords: sources of pollution, atmospheric air, dispersed analysis, PM10, PM2.5, dust, microscopic method, laser method, concentration, sanitary protection zone

The introduction of new standards of higher education, especially the mentality of today's youth lead to the fact that the established methods of teaching classes in high school, by the way, is still widely practiced, do not allow the full interest of students and to provide high efficiency of development of the subject. In connection with the above, great interest is holding lectures with interactive forms obucheniya.Odnoy of the most effective and low-cost training in interactive forms a lecture scheduled errors (lecture-provocation). Teach people to think, quickly analyze professional situations, to act as experts, to work in a team - all this is possible if we use different kinds of interactive activities, including this kind as to the planned lecture errors.

Keywords: systematic approach, improving the efficiency of the educational process, lecture scheduled errors, interactive activity, activation of learning and cognitive activity, technical discipline

This article includes mathematical models that optimize transportation costs flakiness rubble and dropouts

Keywords: flakiness broken stone, gravel, mathematical models, transport, optimization of transport costs

The article reveals the challenges of designing oil and gas sector, associated with large economic costs and shows how to use modern methods of design, namely through the creation of an information model of the project, it is possible to avoid errors at all stages of creation and implementation of the project. Application of information model of the project according to preliminary estimates, could lead to savings of up to 10% of economic resources. Today, many companies have successfully used the BIM model, one of the biggest example is the oil and gas field in Badr.

Keywords: information design, BIM, simulation, implementation of the project, Gazprom-Neft

In this article on the basis of the theory of the systems of mass service (SMS) the analitiko-numerical model is developed for the distributed information system (IS) in the conditions of the high level of a network traffic. Expressions of criterion function for a problem of multiple parameter optimization of the transferred packages, formulas of calculation of characteristics of SMO on the basis of a vector of the stationary distribution of probabilities (SDP) are given

Keywords: the distributed information system, network traffic, the adaptive protocol, queuing system, Markov process, target function, multiparameter optimization, the state space, the infinitesimal matrix, vector of stationary distribution of probabilities.

The article proposes a special device which enables to improve the preparative processes during the main pipeline break at any technique of general maintenance or trench breaking. The device has been made to fix characteristic points on the surface of the earth. The application will enable to exclude the use of stakes or pegs driven into the ground. The device allows to continuously mark the space without stopping the machine to apply a special mix. The use of the marking on portions of pipeline bends will enable to cut the volume of the ground extracted from the trench and therefore to reduce the length of stripping. The application of the device will allow to improve the preparative processes prior to stripping works. The use of the proposed device will give the opportunity of its application in all the climatic conditions nationwide.

Keywords: Akhmedov A. M.

The article proposes an innovative device to install main pipes sections into strings when building and maintaining the linear pipeline portion. The spacial process flowcharts are given to install main pipeline sections into strings and the general view of the proposed device. The application of the device will enable to reduce the number of the pipe-laying machines and to completely avoid the application of special devices and mechanisms when supporting sections and and adjusting their edges to perform welding and insulation works. The device can be used also for tying in of the 24 and 36 m strings into one branch. One can achieve a considerable simplification of the working operation for adjustment and matching the edges of the two extended pipe sections. The proposed device will improve the equipment for the repair and construction site in general and to enhance the quality of the active works.

Keywords: main pipeline, general maintenance, adjustment of pipe sections, building of the linear portions of main pipelines, repair and construction site.

The article presents a description of the main factors, which are necessary for correct simulation of process drying in a fluidized bed of inert particles. The main difficulties encountered in the scaling of laboratory dryers. Specify the nature of the impact interaction of the particles of inert and drying agent on heat-mass transfer in the drying process. Presents the description of the statistical models used to simulate the interaction of particles of inert material. Specify the main parameters and assumptions of the model. Presets the experimental conditions for the analysis of the nature of the motion of individual particles in a fluidized bed.

Keywords: modeling, fluidization, inert, drying, mode, particle, layer, trajectory, scaling