×

You are using an outdated browser Internet Explorer. It does not support some functions of the site.

Recommend that you install one of the following browsers: Firefox, Opera or Chrome.

Contacts:

+7 961 270-60-01
ivdon3@bk.ru

  • Formation of the system of production quality assurance based on the use of the process aproach

    This article is dedicated to theoretical issues of development of the production quality improvement system in the small- and middle-sized enterprises. This system is based on the process-based approach. Briefly the theoretical issues of process-based approach and the main concepts are given. The concept of production quality improvement system and the distinctions from well-known process-based quality management are also given. Objectives and principles of this system are defined by the authors. Also the recommendations by selection of method of assessing the effectiveness of the system.

    Keywords: quality production management, process-based management, quality management system, small- and middle-sized enterprises

  • Modification of Prony algorithm for vector-scalar array

    The algorithm, which allows to apply the Prony method to estimate of the sources parameters using vector-scalar receiving array is discussed. Noise immunity of the proposed algorithm is very high, so as the measured components of the acoustic field does not contain a noise.

    Keywords: Prony algorithm, vector-scalar array, dynamic sea noise, the covariance, the flow of power

  • About kinetics of heat irradiation in mixing and solidification of astringent

    Knowledge of the kinetics heat irradiation give more sources for understanding physico-chemical process connected with solidification astringent. On curves of heat irradiation you can traced three stage and then read the kinetic equations describing each of them.

    Keywords: kinetics, heat irradiation, speed, stages, astringent

  • The problem of implementing a static conical indenter into the region with radial initial stresses

    We consider the problem of pressing a conical indenter in pre-compressed radial force elastoplastic medium. The influence of the initial stresses on the parameters of the indentation.

    Keywords: Diagnostics, resource efficiency, mechanical properties, strength, ductility, hardness, toughness, nondestructive testing, destructive

  • High-frequency bandpass RC filter on current repeaters

      This paper presents a generalized framework level band pass filter used in the construction of broadband active RC filters. The conditions that determine the potential stability of the broadband link and its parameters. A variant of circuit implementation, in which low parametric sensitivity of Q to passive circuit elements is achieved on the basis of its own compensate small-signal parameters of bipolar transistors parameters amplification. The results of computer simulations have confirmed that the principle of self compensate coupling semiconductor can significantly reduce the sensitivity of the parametric parts of the second-order band-pass filters based on existing low technologies.

    Keywords: system-on-chip, band pass filter, quality, current amplifier, the sensitivity, bipolar transistor

  • Simplified determination of parameters piezomaterial on samples of elements in the form of a disk

      The approximate formulas for determination of planar electromechanical force factor and piezomodule in the disk-form samples without Poisson coefficient evaluation of the smallest (first) frequency equation root are derived. It simplifies procedure of measurements because measurement of frequency of the first overtone isn't required.

    Keywords: piezomaterial, disk, planar electromechanical force factor, piezomodule, Poisson coefficient

  • Private and mutual compensation circuits in symmetric stages CMOS operational amplifiers

      The paper discusses the features of their own circuits and mutual compensation circuitry in a differential stage in CMOS transistors. It is shown that their composition can significantly increase the differential gain in symmetric cascades with a dynamic load, significantly reduce common mode gain and extend the range of operating frequencies. As an example, the evolution of the basic concept of a symmetric stage and the results of its simulation in Cadence Virtuoso.

    Keywords: micro circuitry, structural synthesis, complex-function blocks, a differential stage, a CMOS transistor, system-on-chip

  • Search of optimum location of stations of an overload solid municipal waste mathematical methods

    In article the technique of optimization of placement of waste reloading stations, allowing to define both location, and number of stations that allows to reduce both operational and capital expenditure for the organization and functioning of system of the address with a waste is offered.

    Keywords: technological process of transportation, a solid municipal waste, critical distance

  • The influence of white soon and metakaolin on the compressive strength E-modulus and creep coefficient of harden cement paste

    Compressive strength of harden cement paste modified with white soot metakaolin and different superplasticizers ranged from 69 to 182% in comparison with non modified specimen. The elastic modulus ranged from 89 to 137% in comparison with non modified specimenand the measure of creep from 36 to 542%.

    Keywords: portland cement, white soon, metakaolin, superplasticizers, compressive strength, E-modulus, creep coefficient

  • Anomalous electron emission in the soft X-ray irradiation of the surface of electrets

     Theoretical model of anomalous electron emission has built for an soft x-ray irradiation of  surface elektrets, explaining the different character of correlation between energy and emission intensity of ferroelectric  solid solution PbTiO3 - CaTiO3 and nonferroelectric  ceramics CaTiO3.  Shown that  due electret surface irradiation the  Schottky area is  depleted by nonequilibrium charge carriers.

    Keywords: Emission, electret, ferroelectricity, Schottky area

  • Interaction of conical punch with nonhomogeneous base

    Consider the problem the interaction of conical punch with soil base. A scheme of partition the study area into finite elements, The formulation problem, boundary conditions, allowing the equation. Presents some results the calculations.

    Keywords: conical punch, foundation, base, axisymmetric problem, stress, displacement.

      Given the task of calculating the stresses in the radiation-thermal plant screen. This design, also known as «dry protection» is intended to reduce the effects of radiation and heat, generated in the reactor. A significant redistribution of stresses due to changes in elastic modulus due to the above effects.

    Keywords: thermal loading, loading of radiation, the calculation of protection for accident-mode for trouble

  • Mathematical model of deformation of reinforced shells of revolution with an allowance for variable material properties

    Mathematic model considers the geometrical and physical nonlinearity, the adaptability of creep flow. Arc work is accounted for by the method of constructive anisotropy, but with due regard for shear and torsion rigidity. In solving physically nonlinear problems, secant modulus is defined directly from the «σ-ε» curve, found experimentally. Mathematic model is written in the form of functional of total deformation energy. This model can be used for comprehensive analysis of the stability of reinforced shells of revolution.

    Keywords: stability of reinforced shells of revolution, linear-elastic problems, the nonlinear-elastic problems, the problem of creep flow.

      Article is devoted to transformation of the concept of a risk management to the tasks of management by development of city territorial systems. The generalized schematic structure of risk management of development of the urbanized territories is considered. Need of the accounting of economic, ecological and social consequences of administrative decisions in the course of realization of strategy of development of territorial systems is substantiated. The mechanism and algorithm of formation of predictive integratedestimateof quality social-ecological-economic system as a result of realization of strategy of the development is offered, allowing essentially to reduce quantity of analyzed options of operating influence.

    Keywords: development management, territorial systems, risk concept, risk management, integrated estimate

  • Tht ecological-economic modeling of the control and management of mineral natural resources

    Total comprehensive evaluation of the effectiveness of use of mineral natural resources of the WPK and the construction industries is production function and its technical and economic factors. By means of the production function describes the various technical processes of structures of the company, the industry and the region as a whole.
     

    Keywords: Defense funds, industrial funds, economic efficiency, mineral resources, geo-information technologies