With the increase in the coefficient of friction is a growth of the torque transmitted by the lead pair of friction of the main friction, reducing torque is transmitted by the slave pairs of friction friction core group and a couple of extra friction of the friction. Load transfer in the adaptive friction clutches reduces spacer force and accelerate the growth of the torque transmitted by the friction pair of the main driving frictional group.
Keywords: the coefficient gain, a separate positive connection, the coefficient of friction, clutch, friction pair
The coefficient of friction, whereby the total nominal load adaptive clutch transmitted only the leading pair of friction friction basic group is less than the maximum value, which may take the coefficient of friction in actual operation of the coupling. Appearance and an increase in the strength of the spacer when the external load and increasing at an elevated value of the friction coefficient begins at a certain minimum value of the external load, which depends on the total number of pairs of friction of the friction core and the gain. The dependences of the distributions of the torque between the lead pair of friction friction main group and driven friction pairs of basic friction and friction pair of extra friction.
Keywords: the coefficient gain, a separate positive connection, the coefficient of friction, clutch, friction pair
This article discusses methods of modeling the stress- strain state needed to evaluate the different boundary conditions of the technical state of reinforced concrete cantilever operated long spillway. Most long- operated hydraulic structures in Russia is unsatisfactory condition requiring modernization and refurbishment. After a long period of operation waterworks continue to work without a planned repairs necessary to make the technical reconstruction of buildings on the basis of innovation , as well as previously proven technology of repair. Console spillway - open conjugating hydraulic structure where the water first moves over the construction , and then - the water flow freely reset to unfortified ground. Such structures the most economical , since the same difference befov their reinforced concrete part of a much smaller, and no part of the stilling strengthened and basically they are arranged on the rocky soil . When soils are weak, then you must make the console damper on long distance or strengthen easily eroded soil in the fall of the water flow. In the most dangerous cases falling from the absorber fed to a stilling well, for energy dissipation , from which he subsequently moved away from the building. Assessed the degree of accident risk of reinforced concrete elements console spillway . In the experiment sought to identify the residual resource , namely the reliability of the technical state of facilities for the period of operation, more than 60 years , in different types of defects and damages , as well as the estimated residual life . A complex system using a database Microsoft Access.
Keywords: waterworks, console spillway, the stress-strain state, numerical modeling, technical condition, residual life.
To solve the problem of choosing an algorithm of optimal allocation of resources to development of the energy producing industry, initially held the formalization of this task and the required payment ratio. The relationship led to the conclusion of one of the most effective methods for finding optimal solutions-dynamic programming method
Keywords: algorithm, еnergootrasl, distribution, development, function, script charts, dynamic programming
The proposed method of designing hardware components optical switching systems simplifies prototyping and development of systems of optical switching and multi-core VLSI. This method allows to automatically set parameters of the optical system at the design stage, depending on the requirements. This method may be cost-effective at the stage of technical specifications of the project, as will reduce the time required for its coordination between the customer and the design engineer.
At the heart of developing a method of designing systems, optical switching elements is a comprehensive analysis of the equations and functions describing the electrical and optical properties of laser heterostructures, as well as electro-optic modulators and Fabry-Perrot resonators. Fundamental static and dynamic characteristics of semiconductor diode lasers can be calculated by using a set of kinetic equations describing the interaction of electrons, holes and photons in the active layer of the laser structure. At various stages of this method is processing, evaluation and calculation of the main characteristics of the elements of integrated optical switching systems.
Keywords: optical switching, integrated injection laser, quantum-scale heterostructure, amplitude modulation, terahertz range
The mathematical model and the simulation of metal-semiconductor contacts with Schottky barrier volt-ampere characteristics taking into account electrically active impurities inhomogeneous distribution in semiconductor are proposed in this work. The developed mathematical model takes into account quantum mechanical effects during the charge carriers transfer in metal-semiconductor junctions with Schottky barrier and allows forecasting their volt-ampere characteristics. The simulation results meet the experimental data from famous literary sources. The developed mathematical model can be used in computer aided design of integrated circuits elements.
Keywords: Schottky diode, potential, Poisson equation, volt-ampere characteristic
Possibilities of using mathematical programming methods for obtaining optimal solutions of structural units were shown herein. Method of personal optimization based on monotonicity property of the used relations was applied as optimization algorithm. Advisability of using mathematical simulation methods when providing complex safety of construction facilities and reduction of breakdown occurrence is emphasized.
Keywords: optimal design, mathematical simulation, complex safety, personal optimization, plate structures, risk.
Computer-aided diagnostic system of semiconductor structures for the tested structures volt-ampere and voltage-capacitance characteristics measuring at different temperatures in wide ranging bias voltage was made in this work. Computer-aided diagnostic system of semiconductor structures allows to define parameters of deep-lying levels, profiles of alloying impurities distribution, charge carriers life span, surface states energy spectrum density with high reliability and efficiency and can be used for processing and optimization of technological modes for solid-state electronics structures generation.
Keywords: diagnostics, dynamic spectroscopy of deep-lying levels , spectrum, deep-lying levels, surface states, profile of impurity distribution
The article analyses the processes of social life technologization, their role in the development of contemporary society and mankind as a whole. The main trends in the development of social technologies are described in the article. Special attention is given to the scientific approach, the use of scientific methods in the technologization of social actions, the modeling of social processes and technification of social work. The article is of a research nature because it identifies the main problems of a research subject associated with various aspects of social technologies and their potential application in social life. It explores the use of both universal and specific social technologies; explores their phasing and sequencing. The article proves the impact of knowledge of theoretical aspects of social technologies on research in sociology and social philosophy, as well as the practical application of social technologies, allowing one to use their research capacity in social practice.
Keywords: social technologies, technologization of social life, modeling of social processes, sequencing, phases of social technologies, universal social technologies, specific social technologies
The problem of the current method of mass cadastral valuation of land settlements with the type of permitted use - for individual housing. This problem is that the regression analysis used in the present method does not include the cost depending land on their mutual position. A study of the source data proved that the market value of land depends on the degree of proximity of land from each other. On this basis, the work was proposed to use a new, more correct cadastral valuation method - the method of geostatistical interpolation (kriging).
Keywords: cadastral value, geostatistics, regression, interpolation, kriging
The article discusses modernized algorithm of timer for the user library for PLC, through which may increase the efficiency of the use of funds for programming PLC, as well as reducing the time needed to create the program.
Keywords: algorithm of timer, user library, modernization of timer, universal timer, Codesys,CFC
In this work we have investigated the structure of individual single-walled and multi-walled carbon nanotubes by high-resolution electron microscopy and electron diffraction. To grow carbon nanotubes we used a catalytic chemical vapor deposition method. It was shown, that this synthesis protocol gave in general single-walled and double-walled carbon nanotubes with a high level of crystallinity. The diameters of the nanotubes were in the range 1.5 - 7 nm. We also observed that there was a certain level of amorphous carbon deposited on the nanotube surface during the growth. In this work we also present the structure analysis of the double-walled carbon nanotube by means of electron diffraction. We show that the structural date derived from electron microscopy and electron diffraction agree within the experimental error.
Keywords: Carbon nanotubes, electron diffraction, electron microscopy
In the article a double-gap cavity with anti-phase excitation that has wide application in designs of floating-drift klystrons is considered. One of the ways of reduction of time during machine design of klystron’s cavity is using of the simple analytical expression, allowing to determine the main klystron electrodynamic parameters with a sufficient accuracy for practice. In the article we presented the results of physical and mathematical modeling of the double-gap cavity, the corrected mathematical models were introduced that can be utilized in programs of a prompt optimization of klystron's type devices. The technique of creation of approximate mathematical model in this case was reduced to definition of basic analytical function, and the subsequent approximation between experimental and calculated data by means of a method of planned experiment. In presented work the analysis of adequacy was carry out. Analysis revealed inaccuracy of a resonance frequency of an anti-phase type in chosen ranges of change of influencing factors doesn’t exceed 1%, characteristic impedance- 5%. The received analytical ratios allow carrying out quickly calculation of parameters of the cavity, without labor-consuming and expensive experiments and calculations.
Keywords: double-gap cavity, electrodynamic parameters, mathematical simulation, resonance frequency, characteristic impedance, method of planned experiment
The article considers the essence and specifics of state regulation of local markets in the region. With respect to implementing the principles of sustainable development highlights the key tasks of state regulation in the process of formation and development of local markets, determine the forms and methods of state regulation.
Keywords: region; regional economy; sustainable development; local markets; trends
The atricle considers the problem of finding the best carrier. It describes by the expert method of solving the problem, as well as an algorithm for selecting a carrier. Describes a software module implemented with the involvement of technology ActiveX, which greatly simplifies the process and reduces the development time of projects. The proposed application allows you to define a list of the best carriers, ranked by rating according to the user's request.
Keywords: Carrier selection, expert method, weighting coefficient, rank, user application