The article presents the results of complex geophysical studies to assess the environmental safety of the construction of wind power tower installations in order to prevent their design and construction in technogenic and tectonically disturbed zones on the territories of mountain branches of closed mines in the Eastern Donbass. The brief essence of electrical exploration technologies of electroprospecting method by electrical spatial filtering (MPEF) and electro-potential tomographic sensing (EPTS). The information content of the technologies used in conjunction with standard geophysical methods of electrical exploration (vertical electric sounding and seismic survey method of refracted waves) is shown. The results of interpretation of data obtained in the field are discussed. The results of the research were: - identification of EPTS technologies of structural inhomogeneities of the geological section of coal-bearing deposits with their division into lithological (repetition of the form on the electric profiling graphs shifted by the step of the feed line transfer) and tectonic or technogenic ones (difference electric probe curves at adjacent points) - detailing of destructive zones identified by EPTS using MPEF technology: 1) inversions of electro-profiling graphs registered with multidirectional electric field excitation. 2) displacement of inversion points in places where tectonic discontinuities are present in the coal-bearing column.
Keywords: complex of geophysical research, wind power stations, electrical and seismic methods, coal-bearing thickness, rock formations, tectonic discontinuities, mine workings, interpretation of geophysical materials
The article presents the method of appointment of the composition of the molding mixture, which is based on the calculation and experimental approach. The results of the research served as the basis for the practical implementation of the proposed technological method of increasing the durability of small-sized products made of fine concrete. The article was published in the framework of the program of the International Forum "Victorious may 1945»
Keywords: workability of concrete mix, water-cement ratio, grain composition, raw materials, concrete, acidic medium, sodium sulfate, durability, small products, classification of defects, vibration mixing, technological methods
The question of the device of the bases on preliminary condensed basis is considered. Measures are proposed to ensure the reliability and durability of the structure, taking into account the experience of construction in the USSR. Measures of increase of efficiency of construction are considered.
Keywords: organization of construction; economy of construction, soil strengthening, foundations
The aim of the work is to verify the accuracy of the solution of the traveling salesman problem by the method of branches and boundaries with a large difference in the length of the chords of the transport graph. It is considered an NP-hard task. It is proved that the Vig method can not give an optimal result in a transport graph with a large difference in the values of the elements in the cells of the original matrix, when its zero cells will have very different estimates. The reason for the inaccuracy of solving the travelling salesman problem is the inadequacy of the adopted model for the calculation of the original formulation of the problem. It consists in the injustice of the second hypothesis on the evaluation of the zero element in the evaluation matrix included in the optimal route. The hypothesis is accepted without strict proofs and has probabilistic character. The use of the minimum values of the row and column from the matrix is appropriate, as determined by the route of the smallest length. It is doubtful whether it is true that there is always a need to strike out at each stage the zero element with the maximum total score. The reason is that, firstly, it has a random character in General. Secondly, this assessment does not take into account all possible combinations of combinations of branches giving the optimal combination, since their recursion is not carried out. The technique of improving the method of branches and boundaries is proposed, which consists in additional verification of the obtained optimal route by removing the branch with an estimate one step below the maximum at each stage of branching. Numerical experiment is carried out.
Keywords: salesman, best route, branch and bound method, gaps, hypotheses, algorithm, the inaccuracy of the decision, the reason why numerical experiment, improvement method
The article presents a technique for designing and assigning the composition of the molding mixture, which is based on the calculation and experimental approach to determining the composition, taking into account the quality of raw materials used and the requirements for the properties of concrete products produced.
Keywords: Hard pressed concrete, cement, water content of the mixture, two-factor experiment, rotatable composite simplexummable plan, regression equation of the experiment, quasi-factor analysis
The paper presents the design procedure and the appointment of the composition of the molding mixtures, which is based on computational-experimental approach to the determination of the composition taking into account the quality of the used raw materials and requirements to the properties of concrete manufactured products
Keywords: Raw materials, grain structure, concrete, svezheulozhennye mix, precast products, hard pressing, block diagram
Experimental data about influence of processing in the conditions of hothouse combine on a svetokultura of a cucumber of a grade of "Tseres", research of influence of processing of seeds by rostoregulyator and various modes of the laser on a phytosanitary condition of a cucumber and its productivity are presented in article. Results of researches confirm positive influence of intensive technologies on cucumber plant phenology, on increase of productivity and quality of end products and can be recommended for use in technology in hothouse farms.
Keywords: огурец, лазер, ростостимулятор, интенсивная технология, фенология, урожайность, качество продукции, исследование, эксперимент.
In the present study, platinum was electrodeposited onto rotating disc electrode coated with Vulcan XC-72R Nafion suspension and uncoated smooth glassy carbon electrode from acidic solution of 5mМ H2PtCl6. The electrochemically active surface area of platinum particles obtained was determined by cyclic voltammetry and the structural characteristic of the particles was studied by scanning electron microscopy. The impact of current and time on the electrochemically active surface area of platinum particles electrodeposited on the carbon supports was also investigated and described in this paper. The present work is expected to be utilized and contribute to the improvement of electrochemically active surface area of platinum catalysts for low temperature fuel cells.
Keywords: galvanostatic electrodeposition, chronopotentiometric curves, chloroplatinic acid, vulcan XC-72R, fuel cells
In this article is reviewed the nature of organic hybrid nanocomposites. Promising directions in the field of organic hybrid nanocomposite materials will be methods for the synthesis of multicomponent materials, as well as the type of "net net" and "host-guest". The fundamental problem with the chemistry and physics of nanocomposites is dependent "structure-property". Solving this problem will move from research materials to their purposeful design.
Keywords: nanocomposite sol-gel technology, synthesis, nanoparticles.
The method of coding of the geometrical information is offered at the task of executive mechanisms on the basis of use of the set set of spatial primitive things and their orientation in mobile systems of co-ordinates. The method of a designation of geometrical models of mechanisms of robots is offered. One of advantages of the developed method of representation of geometrical models of kinematic chains, possibility of more exact task of a spatial configuration of manipulators by means of use of a considerable quantity of central points and various position of volume primitive things concerning a constructive plane is.
Keywords: Mechanisms of manipulators, geometrical models, virtual modelling of movements of robots
In the article describes the program realization of calculation unit pneumatic measuring system. The program is implemented in the languages of IEC: CFC and ST. Algorithm written with the possibility of future use in systems that differ from described in the article. The developed algorithm allows to measure temperature directly using computing power PLC and get the result in the final form, without any changes on the part of the operator.
Keywords: pneumatics, temperature, airflow, algorithm of temperature measuring, temperature measurement, Codesys, CFC, ST
In this paper a modification of logic element DC LUT FPGA is proposed for the purpose of the acceleration of diagnostics. Simulation of proposed modification was performed in the system NI Multisim 10 by National Instruments Electronics Workbench Group. Evaluation of hardware costs is also given.
Keywords: logic element, DC LUT, FPGA, diagnosis, reliability
The atomic structure of bimetallic nanoparticles of Pt-Ag composition, which are the part of metal-carbon electro-catalysts PtAg/C, is studied by means of EXAFS spectroscopy using the suggested technique. These materials have been prepared by methods of consistent and simultaneous deposition of Ag and Pt atoms from aqueous ethylene glycol solutions of their salts with subsequent acid treatment. The values of the structural parameters of the near environment of platinum atoms are determined. The nature of the distribution of components in nanoparticles is established. Cluster models of nanoparticles are constructed. The fraction of Pt atoms in the working shell and its dependance on preparation methods in each case are determined.
Keywords: Metal-carbon electrocatalysts, bimetallic nanoparticles, Catalysis, Platinum, X-ray absorption spectroscopy, atomic structure
This article is devoted to description of structure of methodology of modelling of hierarchical problem-directed systems on the example of social and economic systems. In the basis of methodology the principle of a combination of the formalized methods of modelling and expert procedures is put. Modelling of hierarchical system is offered to be spent by means of multilayered fuzzy cognitive maps. Filling of the block of logical-mathematical models in structure of process of decision-making is described in detail. The offered methodology provides the development and choice of well-founded administrative decisions.
Keywords: Problem-directed system, decision making, fuzzy cognitive model, methodology
The article is devoted to modelling of process of decision-making in difficult systems in the conditions of total uncertainty. The problem is formulated on the basis of synthesis of concepts of the control theory and decision-making, the theory of fuzzy sets and the fuzzy logic, the theory of hierarchical multilevel systems, the utility theory and the theory of games. The given concept expands possibilities of the account uncertainty the various nature, typical to mathematical description of the surrounding validity. Problems of search of decisions in an fuzzy hierarchical control system are designated. The way of the description and finding of alternative decisions in multilevel difficult systems is offered in given article. The algorithm is based on information processing in the form of fuzzy intervals taking into account two kinds the politician conservative and aggressive on the basis of criteria «maxmin» and «minmax». The method of projection on individual interval is used for comparison of the fuzzy intervals presented on various dimension scales. The example showing work of algorithm of a choice of two groups of alternatives is resulted: optimistic and pessimistic on a level of hierarchies of the purposes in the conditions of total uncertainty.
Keywords: Difficult system; decision making, fuzzy interval, the control decision; total uncertainty