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  • Modeling of changes of physicochemical characteristics of potash fertilizers at storage and transportation

    A model system was designed and test  trials of physical and mechanical characteristics of small – crystalline and granular flotation potassium chloride are studied. This model system allows to design storage and transportation  of fertilizers in bulk in railway wagons and it has the same static and vibrational load as real system. The effect of temperature and relative humidity of the air on hygroscopy of small – crystalline and granular КСl were studied. Furthermore the influence of static load, and time length  of compression process of fertilizing layer and parameters of static and vibrational load on composition of КСl granules were investigated. It was experimentally proved that the humidity increase (0,5 %) of granular КСl and the  increase of static load and time length  of compression process of product during transportation in bulk lead to increase of compaction degree and caking ability of product. Research of the influence of high static load (10-30 kg/sm2) and time length of compression process of fertilizing layer on caking ability and degree of compaction show that small – grained KCl has smaller degree of compaction and considerably higher value of caking ability in comparison with granular KCl.

    Keywords: Potash fertilizers, storage and transportation, hygroscopy, caking ability, degree of compaction, commodity characteristics of fertilizers

  • ANALYSIS OF PUMP ASSEMBLIES WITH STATIC

    Considered feature design of pump and presents the results of a study of Assembly parts: pump shaft, cotters, impellers. Research of include: measurement of runout of the shaft and the shaft with working wheels, on the basis of measurements was concluded. 

    Keywords: Assembly, shaft, wheel, analysis, heartbeat, gap.

  • The propagation technology of Chinese Cedar (Platycladus orientalis (L.) Franco) for green building in Rostov region.

    The main methods of Platycladus orientalis seed propagation are studied. For Platycladus orientalis industrial cultivation the following technologies of reproduction are recommended: For off-sort samples – seed propagation after stratification (25-30 days); For sorts and decorative forms:
    1.Vegetative propagation using IAA.
    2. Micropropagation of Platycladus orientalis in vitro by means of adventitious shoots induction on the MS medium adding 0,2 – 0,5 mg/l BAP. There are derived well rooted microshoots on the medium with IAA in concentration 5 mg/l.

    Keywords: green building, Platycladus orientalis, technologies of reproduction, clonal micropropagation.

  • Method for railway car numbers block recognition based on committee neuroimmune classification

    This paper presents a new neuroimmune-based method for block recognition of railway rolling stock inventory numbers. The advantage of such approach is  classification without using of negative samples. Developed technique combines segmentation and classification that allows to achieve higher noise robustness, segmentation possibility of fuzzy combined digits which have different fonts and typeface, and invariance of existing numbers to scale changes. Proposed method allows to constantly increase the training set for the improvement in classification accuracy by new committee classifiers statistics due to the data reduction property achieved by using the immune clustering mechanism. Research results were implemented in the software system of automatic recognition of cars numbers (ARNV), which is operated on the JSC Russian Railways.

    Keywords: Method for letters block recognition, the committee neuroimmune classification model, identification, automatic recognition car number, duplicate number

  • Liquid glass and aqueous solutions of silicates, as a promising basis for technological processes of new nanocomposite materials

    The properties of the water-soluble high-modulus silicate systems: based on alkali metal polysilicates called liquid glass and chain their transformation from lower to higher oligomers, with the subsequent formation of colloidal solutions - silica sol. The methods of preparation, properties and applications of water-soluble high-modulus silicate systems. The possibilities of their use as a binder and modifying agents for various nanostructured composite materials. The examples of promising areas of application of liquid glass and high modulus of aqueous solutions of silicates in construction and industry. In particular show the possibility of using liquid glass and aqueous solutions of silicates in the production of nanostructured silicate polymer. In space engineering for manufacturing water-destructed mandrels used in the manufacture of solid rocket motor casings and pressure vessels 'cocoon' of composite materials by winding. The application of the inorganic sol to obtain a nanocomposite ceramics and monolithic blocks of silicon oxide, which can be used in various fields of modern technology. The possibility of using silica sol as a binder for refractory ultra-lightweight shielding materials used to protect equipment from high impacts. The directions of development of the production of new acid-resistant materials and linings for protection of chemical equipment, parts and components operating in corrosive environments.

    Keywords: Keywords: water glass, silicate polymer concrete, additives, silicates organic bases tetrafurfuriloksisilan, furfural alcohol, nanostructure composite materials, water-soluble silicates, silica sol, sol-gel transition, cured xerogel water-destructed mandr

  • Features of obtaining manganese dioxide by method thermolysis on the tantalum anode of condenser

    In the article obtaining of cathodic coating MnO2 on condenser porous tantalum anode was researched. It was ascertained that formation of crystalline defects from hydrated MnO2 on MnO2 coating obtaining by known technology is possible. Such formations disturb tantalum capacitor cathode integrity. To determine the reasons of the crystal defects formation conveyed simultaneous thermal analysis of Mn(NO3)2x4H2O and Mn(NO3)2x6H2O with an analysis of the flue gases by FTIR spectroscopy. Based on the analysis results a mechanism of manganese nitrate thermolysis was suggested and the cause of the crystal defects on the surface after the coating of manganese dioxide removed from the furnace was ascertained. It was established that the thermolysis process is followed by the formation of such manganese nitrate intermediates as manganese hydroxynitrate, manganese oxyhydroxide and its further oxidation to manganese dioxide. Because of secondary processes leaking on the MnO­2 cover manganese oxyhydroxide residual can react with water vapor and oxygen, that leads to the formation of crystalline defects. Such phenomenon has a negative impact on the chemical composition and integrity of the coating on the surface of the porous MnO2 tantalum capacitor anode. Also it has been found experimentally that manganese hydroxynitrate is formed from manganese nitrate in the form of microtubules on the porous tantalum vehicle surface.

    Keywords: manganese dioxide, coating, manganese nitrate, thermolysis, crystalline defects, microtubules

  • The physicochemical analysis NH4NO3 – KNO3 – Н2О system at 25 degree C

    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

  • Neural network on basis of homeostaticcontrol mechanizm

    The consideration of basic control homeostatic system is carried out. With a glance on Stepanov’s research result in the area of medical homeostatics the conception of oscillatory homeostatic neural network on the basis of the meridional homeostatic model of human body is generated.

    Keywords: homeostat, knowledge, neural network, meridional homeostatic model

  • Integral robust features based technique for optical identification of railway vehicles

    Identification of railway vehicles is relevant for the conversion from automatic control systems with manual data input to automatic modeling environment of train and vehicle. The most effective and economic inventory number recognition is optical recognition. But there is question about veracity in such technology. This paper represent the qualitatively new approach for optical recognition based on building integral robust constructive features of vehicles and allowed to significantly increase level of recognition veracity. Proposed technique investigated in introduction subject of automatic vehicle number recognition system (ARNV).  Computational experiments demonstrated relevance of proposed technique for using in optical recognition of vehicle numbers.

    Keywords: Automatic systems, number identification, vehicle, optical recognition, ARNV, robust features

  • Technique of automated control of students' knowledge on the subject "Theory of computational processes"

    Article is devoted to the organization of the control of knowledge on the subject " The theory of computational processes " in the form of automated testing . The proposed methodology of automated control organization of knowledge within the discipline described . Approaches to create a structure sets of tests to select the most appropriate forms of tests are described . Application of the test tasks open and closed forms justified. For testing was selected freeware MyTestX. Features of this program are given . Examples of test items open and closed forms are given .

    Keywords: theory of computational processes, training, automated control of knowledge, testing, test job

  • Modeling of electrodynamic parameters of a multi-mode double-gap cavity for using in miniaturized multi-beam klystron’s devices

    For miniaturized vacuum klystron type devices utilization of a double- gap strip-line cavity with suspended ceramic substrate is very promising. 
    The two-mode operating mode of such cavities practically isn't studied enough; so there is the great scientific and practical interest for research of electrodynamic characteristics of cavities during multi-mode operation that correspond to simultaneous excitement of anti-phase and co-phase modes in a double gap.  
    In this article results of the 3-D numerical modeling by means of the Ansoft HFSS code are presented, and also the experimental results of the electrodynamic properties of the half-wave double- gap cavity with the suspended ceramic substrate are submitted. Optimum parameters of this design, allowing to carry out simultaneous excitement at multiple frequencies with frequency rate (K=2) are determined.
    In such cavity high values of unloaded Q factors isn’t need because dielectric losses and conductor losses can be compensated at the expense of  the negative electronic conductivity that brought by modulated electronic beam. The operating mode with frequency rate   can be used for increasing of efficiency of generating and amplifying micro devices with filament cathode and matrix field emission cathodes.  

    Keywords: double-gap cavity, electrodynamic parameters, mathematical simulation, resonance frequency, characteristic impedance, method of planned experiment

  • The vibrations of multilayered half plane with relatively much sunken cavity of arbitrary shape

    The solution of vibration problem for multilayered half plane with cavity of arbitrary shape is constructed using boundary element method. For the case of relatively much sunken cavity an asymptotic representations for fundamental solutions is used. The results of problem simulation for displacement and stress fields close to cavity surface are given using boundary element method

    Keywords: multilayered environment, cavity of arbitrary shape, asymptotic analysis, boundary element method

  • The interconnected control system of heating and ventilation installations in the protected ground

    Consider the use of management system of heating and ventilation plants in greenhouses, uniform distribution of heat and humidity in the area of biological objects, the use of an improved system of management regimes of the microclimate in the protected ground on the basis of programmable smart relays

    Keywords: power consumption, temperature-humidity conditions, microclimate

  • Research of process of wettability of pulverulent potassium chloride containing the admixtures of flotoreagents

    The express-method of estimate of the rate of wetting  of pulverulent powder of KCl is developed. The wettability of potassium chloride powder containing the admixtures of flotoreagents by solutions of different binders is studied.

    Keywords: wettability, flotoreagent, binder, transformation, muriatic amine, sodium metasilicate

  • Principles of metrology information-measuring systems for analytical measurements in biomedicine

      Regarding the structural evaluation of the instrumental error of bio MIS tool software package was developed that allows to take into account the error in the analysis of clinical diagnostic measurement in hematology research. It allows to analyze the results of hematological measurements with the measurement error and issue you with a message that characterizes getting results within normal or unreliability. Nanoparticles in biomedical analytical measurements are used as contrast agents, since, being immobilized specific proteins with adhesion to the diseased cells and bacteria. Register ultrasonic signal produced when the laser blood flow to the entered nanoparticles allows the detection and enumeration of diseased cells. The block diagram of analytical studies was designed to prove its basic metrological characteristics. Research is conducted in the centers for collective use of the Southern Federal University "Nanotechnology" and "Laser Technology", equipped with modern and unique nanotechnology research equipment.

    Keywords: Bio MIS, nanoparticles, hematological measurements