this article raises the question of choosing a set of machines and shaping the sound of the algorithm sets of machines and mechanism that allowed us to determine the basic design characteristics, the type and number of vehicles, as well as the feasibility of using mechanisms in the construction processes.
Keywords: machines, equipment, technology, organization, set
The article is dedicated to the description of the simulated model of the heat producing base making it possible to estimate the resource of energy efficiency of the prototype system and its requirement of fuel, elecrtic energy and water. There are some different ways of decomposing of application cases of energy efficiency measures depicted in the article.
Keywords: economic impact, direct and indirect cost, risk assessment, replacement value, NPV
This paper describes a hardware-based and software system parametric estimation of signals. It`s experimental accuracy was achieved measuring the phase difference between the two quasi-harmonic signals at 10 μrad.
Keywords: parametric analysis, technical diagnostics, the phase difference
The article is dedicated to development of a mathematical model for evaluation of production assets in smart power grids state for decision support system. The results of equipment state evaluation can be used for prognosis of reliability of the asset and each of its components functioning for the time interval, for which various versions of technical solutions are considered.
Keywords: decision support system, state assessment, Smart Grid
The simulation of two-dimensional spherical crystals consisting of a large number of particles is carried out. These shells were analyzed based on their geometric structure and energy distribution. Various types of defects formed in a state of equilibrium is considered. Being shown the ambiguity of the existing method of their interpretation. A new way of describing such defects in the close-packed two-dimensional crystals with different topology is suggested.
Keywords: topological defects, two-dimensional materials, spherical crystals, topological charge
The techniques generate a directivity diagram a slot antenna array with variable polarization. The results of calculation the characteristics of radiation for an array dimension 4x4 elements.
Keywords: AESA, microstrip antennas, spacecraft, remote sensing of the earth.
The kinetics of the electrodeposition of zinc to the steel base of the sulfate electrolyte supplements with synthetic surfactants was studied. Found that at potentials more positive than the equilibrium value the process of pre phase zinc deposition. Additives synthesized organic compounds adsorbed to the surface of the electrode at its cathodic polarization, increasing of overvoltage process. The adsorption is in the range of 0,5•10-7 to 2,6•10-5 mol/сm2.
Keywords: zinc, electrolyte, electrode, surface-active agents (surfactants), electrodeposition, adsorption, diffusion coefficient, and pre phase deposition
An estimate of the frequency discretization interval was obtained in solving diagnostic problems of a piezoceramic element by means of different methods based on measuring the active component of conductivity in a number of discrete points. This allows avoiding precision loss and, at the same time, reducing the number of measurements and computational operations.
Keywords: Piesoceramic element, Q-factor, active component of conductivity
The paper studies the possibility of quantitative processing of the GPR data for determining the dielectric permittivity and conductivity of a medium (soil samples). Experimental studies are made using radargrams of soil samples with specified values of moisture and conductivity. New methods of quantitative processing of radargrams are proposed in this work to determine the dielectric permittivity and conductivity of soils. The methods were successfully tested on various sections of Russian railways net.
Keywords: layered road profiling, GPR, soil moisture, soil layers profiling, soil conductivity
Calcating-experimental method shows that on the basis of cement and fine-grounded mineral powder, complex binding materials can be obtained, providing high strength of obtained stones.
Keywords: cement, mineral powder, components, optimization, strength
This work deals with the study of atomic and electronic structure of kaolinite samples (Glukhovtsy deposit) and montmorillonite (Millerovsky deposit) by density functional theory. The applicability of existing exchange-correlation potential in the local density approximation (LDA) and the generalized gradient approximation (GGA) is analised for an adequate description of the physical properties of layered aluminosilicate. An experimental and theoretical study of the IR spectra of minerals, as well as the identification of the most intense absorption bands, performed in the approximation of DFT using the exchange-correlation potential PW91. The analysis of the band structure of these minerals, which showed that these compounds are direct-gap insulators.
Keywords: DFT, clay, clay minerals, phyllosilicates, atomic and electronic structure, crystalline systems, IR spectrum band strukutra, the electron density
In this article the problems of transport modeling, modeling methods of the paid roads, their features, advantages and disadvantages are considered.
Keywords: transport modeling, check-point on the paid road, point of collection of a fare, modeling methods, imitating modeling, the program AIMSUN complex
This work deals with the integrated study of the composition and structural characteristics of the rock-forming minerals in Millerovsky bentonite clay. The qualitative and quantitative analysis of the clay samples is made by X-ray diffraction , X-ray photoelectron spectroscopy and thermal analysis . The morphological and microstructural features of minerals are investigated by scanning electron microscopy. The application of the method of direct theoretical calculation of the diffraction patterns is showm to determine the crystal-chemical parameters of the studied minerals. The results are aimed at explaining a number of physical and chemical properties of layered aluminosilicate.
Keywords: clays, clay minerals, layered silicates, x-ray diffraction, crystalline systems
The problem of utilization of iron ore tailings . The prospects of iron ore mining in the Russian underground . A method for extracting iron from tailings to 9 % of the original content, by mechanochemical processing. The results of particle size distribution , chemical and mineralogical analyzes of samples collected waste ferruginous quartzites LGOK . Experiments were carried out using the methods of planning optimal experiments , Box-Behnken and included 24 experience. Obtained according to the content of metal recovery in the leach solution of sulfuric acid , sodium chloride , rotor speed and the ratio of disintegrant liquid and solid phases. This dependence allows to determine the optimal parameters of technology in terms of " metal recovery ." The resulting secondary processing of tailings to be used in the manufacture of hardening mixes for stowing as an inert filler and binder counterpart .
Keywords: tailings, mechano-chemical activation, iron ore, ferruginous quartzites, metal recovery
In the article it is reflected the results of carrying out numerical research of supporting capacity of side interfenestral bus body pillars. It is carried out calculating of detailed final element model of bus body pillars with considering the physical and geometric nonlinearity. The implementation of final element analysis of the stress-strain state of bus body pillars is provided for simple and complex bending. It is made the consideration of the influence of chemical material corrosion on stiffness and strength characteristics of the body pillar. Modeling is made with the use of opportunities of a package of the applied ANSYS programs.
Keywords: The bus, safety of bus construction, strength, deformation, body pillar, corrosion