A timber industry complex is a complex of technological processes linked with timber harvesting, wood transport and woodworking. For their optimization are used mathematical and economic methods. The brief overview of the application of mathematical modeling methods for the analysis and optimization of technological processes in the forestry sector is given in the article. Queuing theory is used for analysis of forestry process. For example harvesting technology with the round logs production for wooden construction is considered as G/G/1 queuing system. Well-developed models of queuing theory are recommended for analyzing of forestry process. Simulation models are recommended for deep analysis of forestry process.

Keywords: Forestry process, woodworking, cylindering, queuing theory, timber industry manufacture, wood construction

The solid solution of  LiMn1/3Cr1/3Fe1/3O2 with the structure of α-NaFeO2  isostructural with the widely used LiCoO2  has been synthesized and investigated as a cathode material. Rated voltage of LiMn1/3Cr1/3Fe1/3O2  relative to the lithium is 4 V.  The possibility of charging − discharging the material to a specific capacity of 220-250 mAh/g at currents of C/15-C/50 without phase transformations has been experimentally demonstrated. 

Keywords: lithium-ion batteries, cathode materials, Delafosse, solid solution, X-ray structural analysis, electrochemical properties

This paper presents a method of processing and interpreting data from the semantic differential technique. It is shown, the emotional perception calculated on the standard method of average values gives an incomplete picture. The technique is approved in research of emotional perception of the political order among DGTU students. It is obtained, distribution of the studied group is inhomogeneously on emotional perception of political orders. For audience as average, and the most probable levels of perception of local and central political orders are positive and equal 0,1. However, 27% of students are characterized by a negative level of emotional perception of political order, with the average value -0.3.

Keywords: modeling, political order, group settings, the affective component, semantic differential, questionnaire

In the article are introduced research results of physicochemical properties of ammonium nitrate – potassium nitrate water system at 25o C. The literary source analysis is performed that no clear opinion about solid phases composition. The different composition double salts, solid solution and eutectics are identifies. Appeal is specifies a look and properties of formed structures. Methods of differential thermal analysis and X-ray diffraction have been establishing that the equilibrium solid phase of the studied system represents two types of solid solutions. A first type based on the III phase of ammonium nitrate crystal latitude (at the content of nitrate of potassium to 20 %) and a second type based on the potassium nitrate rhombic syngony (at the content of nitrate of potassium more than 80 %). Crystal cells parameters of being formed phases submit to the Vegard rule. The ammonium nitrate sample (at the content of nitrate of potassium more than 12 %) keeps phase stability at the temperature range minus 50 to plus 100о С. Burst in components miscibility at the potassium nitrate concentration range 30 to 80 % is observed.

Keywords: ammonium nitrate, potassium nitrate, differential thermal analysis, X-ray diffraction, cocrystallization, solid solution

Some aspects of the use of fuzzy logic to generate a mathematical model to search for objects on the sea. Describes how to use the algorithm Mamdani, to create a model of fuzzy inference. Section gives an example of the use of Fuzzy Logic Toolbox package Matlab, for the simulation of fuzzy search engine and determine the optimal solution of the problem to find the object.

Keywords: mathematical model, fuzzy logic, object search algorithm Mamdani, membership function

Specialized robots are occupying a vast share of researches worldwide. In terms of aerial specialized robots, autonomy is the one of the major subjects that are being studied. As  known, flight autonomy is consisting of three parts: Mission planning, trajectory generation and path tracking. While it exists variety of local and global generation algorithm, UAV path planning is always associated with machine vision. This intellectual approach is solid because it can give a dual supervision link to the situation being surveyed. The operator has always the authority to step in and stop any unwanted action. The machine vision based algorithm has a huge disadvantage due to homogeneity and identity factors. This is because from distance object tend to look the same geometrically as well as color wise. In this paper we offer a solution to tackle the homogeneity problem between tracked agents which can cause local minimum problems. The UAV will forecast the next position of the tracked agent using Artificial Neural Networks. Position estimation is based on registered previous coefficient.

Keywords: position prediction, path planning, quadrotor, neural networks

The combination of the unique, abnormal properties shown by oxidic systems with structure of spinel on the basis of transitional elements chromites draws attention of researchers for many years. Some systems on the basis of transitional elements chromites (for example, nickel and copper chromites) have critical elements (multicritical points, lines of phase transitions of the second sort, etc.) on the phase chart. Near these elements of the phase chart materials possess unique chemical and physical properties. Therefore development methods of receiving and research of phase forming and properties in NIO-CoO-CuO-Cr2O3 system represent fundamental and practical interest for chemistry and technology of inorganic substances. In this work processes of spinel structure formation in system 0,6 NiCr2O4 – 0,2 CoCr2O4 – 0,2 CuCr2O4 from crystal chemistry positions are considered. Formation of two solid solutions on the basis of nickel (II) chromite – with structure of cubic spinel and with tetragonal distorted structure is established. The influence of cooperative Yahn-Teller effect on processes of a spinel forming and on stabilizing impact of chloride of potassium on process of education of  two spinel solid solutions is suggested. Influence of a power factor of cation stabilization in knots of a crystal lattice as one of the important factor in reaction of spinel structure formation is considered.

Keywords: spinels, chromites of transitional elements, Jahn-Teller effect

The article examines the cognitive and behavioral components of group attitudes toward political order of students of DGTU.  Pilot study took place in 2013 and was carried out using questionnaires, which was attended by 52 people. The analysis represents a hierarchical clustering on the basis of consecutive factorization. It is received, group level of a relative deprivation – 0,46. In assessing deprivation group decomposed into two subgroups, with average values in each - 0.3 and 0.6. Perceptions of political order at the cognitive level:  -0,174 for local government and-0,139 for Russia. In perception of local government the group broke into two subgroups: -0,3 and 0,2. Behavioral component perception of political order defined by two subfactor: active behavioral level - 0.39, and the estimated level of oppositional behavior - 0.57.

Keywords: group settings, the affective component, a behavioral component, cognitive component, relative deprivation, questioning, political attitudes, factor analysis

In the autumn of 2013 a pilot survey was conducted among students DSTU, which was attended by 52 respondents. Purpose - to reveal emotional perception of the students of local and central political government by the method of semantic differential. The paper presents a psychosemantic phenomenological model processing of survey results by the method of semantic differential. On average semantic portraits are calculated relative distances between the group images of real political order and the images of the ideal constructs. Phenomenological parameters are determined by them and calculated the required level of group emotional perception of a political order. Calculations group levels of emotional perception of the political order showed similar results as the linear approximation: -0.015 for Region and for Russia as a whole -0.033. Shown, the model allows to determine not only the group levels of perception, but also to build the surface of the stationary states. This surface describes the behavior the level of perception associated with a quasistatic change of phenomenological parameters caused by external conditions. Images of perception of real political orders are in quiet area. At quasistatic variations of external conditions it is necessary to expect little smooth changes of level of perception.

Keywords: political order, semantic differential, questioning, catastrophe theory, psychosemantic phenomenological modeling

Nanotechnology is a technological breakthrough in agriculture, have great potential because they allow you to combine economic efficiency and natural ingredients to solve many problems in agriculture. To achieve high efficiency in agricultural production in recent years, using new agrobionanotehnologies. Authors of this article is working on the development of environmentally safe (nano) technology treatment of seeds of different crops using multi multifunctional biologically active (nano) chips. The obtained test results allow us to conclude about the prospect of being developed (nano) technology pre-sowing treatment and training opportunities 1-2 applications for patents on new research conducted in the development of the developed concept of «non-pesticidal agricultural products.

Keywords: agrobionanotehnologies, (nano) chips, pre-sowing seed, sowing qualities

Maximum power pointtracking algorithms are widely used in the solar converters in order to obtain maximum power from the solar array. The article provides a brief description of the work of these algorithms, description of the method of testing based on mathematical modeling using Matlab, Simulink and SimScape packages. The results of modeling and comparative analysis  of the studied algorithms, its  strengths and weaknesses revealed.

Keywords: maximum power point, maximum power point tracker, photovoltaic, buck converter, comparative study of algorithms, perturb and observe method, constant voltage method, constant current method, icremental conductance method

The modification of the most common steganography method for various container is presented. This modification allows to increase the resistance of steganography to the statistical analisys. A comparative analysis of the effect of the traditional LSB matching method and the proposed modification to the frequency histogram of sample values ​​in the container is presented.

Keywords: steganography, steganalysis, information security, embedded data transfer

Fe-doped AlN nanorods were studied by means of x-ray absorption spectroscopy above the Fe K- and L2,3- edges. Theoretical simulations of the x-ray absorption spectra show that Fe atoms mainly substitute Al. A minor fraction of Fe interstitials or Fe-Al-N ternary alloy can be identified as well. Bader’s AIM analysis predicts that neutral substitutional FeAl defect is in 2+ charge state, though Al in pure AlN is in 3+ charge state.  Fe L2,3 absorption spectra and photoluminescence data indicate the coexistence of Fe2+/Fe3+ in AlN:Fe nanorods so different charge states of substitutional FeAl should co-exist.

Keywords: diversification of management, production diversification, financial and economic purposes of a diversification, technological purposes of ensuring flexibility of production

The advanced multispectral method is developed for formation and recovery of the image of a hypodermic on the basis of function of a detuning and its algorithm realizing. The method reduces distorting influence of change of characteristics of skin on image formation. Use of function of a detuning allows to make processing without observance of rigid requirements to the accuracy of a choice of lengths of waves on which images and, respectively, providing a preset value of the relation of values of optical thicknesses of skin are formed.

Keywords: Restore images, multispectral method, the function of detuning, the optical thickness, the reflection coefficient

In article the structure, functional architecture and mathematical model of the system intended for automated management by information procedures in the automated information system are considered. The offered model is based on monitoring of initial and flowing conditions of the information streams subjected recomposition on the basis of operating markers by the serving router. A system kernel is the Server of configurations supporting discrete disciplines of management by service.

Keywords: information service, priority management, an information stream