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коллекция "otherreferats"
Главная Коллекция "Otherreferats" Физика и энергетика
  • 421. Solar energy in Ukraine: analysis and its role in ensuring economic security

    The current state of renewable energy sources in Ukraine is studied. The indicators of the total capacity of solar energy of Ukraine were analyzed and the rating was determined in Europe by growth rates. Factors influencing the market of energy services.

    статья (674,4 K)
  • 422. Solution Conductors in Conducting Liquid

    Features of the use Gauss law. System with two line charges. The potential from both line charges is a superposition of both potential. Since the system has a high symmetry, may to use Ampere's law. Choice of the Ampere loop. The magnetic field.

    реферат (885,8 K)
  • 423. Space and Relativity in Newton and Leibniz

    The usual interpretations of Newton's and Leibniz's view on the nature of space and the relativity of motion. A more accurate rendering of the opposition between Newton and Leibniz. Leibniz's theory of space against the representation of motion.

    статья (2,2 M)
  • 424. Spectral dependencies of Evans function for the Schrodinger equation

    The specific properties of the Evans function, its use as a tool in mathematical physics. Application of the Darboux transformation to the Schrodinger equation. Solution of the standard Riccati differential equation. Investigation of a discrete spectra.

    статья (30,6 K)
  • 425. Steam turbines

    Steam turbines design. Classification of steam turbines according to the method of energy conversion, according to the direction of flow, according to the number of stages, according to the speed of rotation, according to the steam pressure at the outlet.

    презентация (9,1 M)
  • 426. Structural features and potential risks for the functioning of the energy security system of Ukraine

    Processes, elements, components of factors of influence on the state energy security system. Sensitivity of elements of state energy security system to external and internal factors that directly affect the quality of its functioning. The types of risks.

    статья (414,8 K)
  • 427. Structural, dimensional and thermoelectric properties of melt spun p-Bi0,5Sb1,5Te3

    The receipt of the thermoelectric properties of p-alloy powders and their structural properties. Compaction of powders by vacuum hot pressing and spark plasma sintering. The thermal conductivity of the samples, the calculation of the Seebeck coefficient.

    статья (658,5 K)
  • 428. Structure and Anti-Stokes Luminescence of Yb-containing Glass Co-doped with Eu, Ho and Er

    Synthesis of transparent siliceous environments with high-doped Yb-Er, Yb-Ho and Yb-Eu. Definition of media structure and spectral-luminescent properties in the anti-Stokes region when excited by ions Yb3 +. Analysis of properties silicious glassy media.

    статья (529,6 K)
  • 429. Structure and properties of superhard (Zr-Ti-Cr-Nb)N coatings

    Structure, composition and properties of these coatings were studied. Hardness measurements and adhesion tests were provided. Values of hardness and cohesive strength. Physical and technological parameters of deposition, elemental composition of coatings.

    статья (583,9 K)
  • 430. Structure effects on reaction mechanisms in collisions induced by halo and weakly bound nuclei around the coulomb barrier

    The study of reaction mechanisms in collisions induced by halo and/or weakly bound nuclei around the Coulomb barrier. Description of the reaction dynamics. Preventing capture incoming projectile suppression of synthesis. Activity irradiated targets.

    статья (211,3 K)
  • 431. Structure peculiarities of three- and four-cluster nuclei 6He, 6Li И 10Be, 10C

    Familiarity of peculiarities of three- and four-cluster nuclei 6He, 6Li И 10Be, 10C. The steps for calculating the distribution of the charge density and form factors of the nuclei, analysis of the asymptotic behavior of the amplitudes of clustering.

    контрольная работа (956,4 K)
  • 432. Structure Properties of Neutron-Rich Exotic Nuclei

    Theoretical study of important bulk properties of nuclei far from stability. The formation of neutron skin and its evolution with an increase of the neutron number is investigated on the basis of a self-consistent deformed mean-field Hartree-Fock.

    статья (503,0 K)
  • 433. Study of electromagnetic wave backscattering from structures with anisotropic conductivity

    A possibility of backscattering controlling by means of structures with anisotropic conductivity is considered. It is shown that applying of this structures allowed to reduce the backscattering from leading and rear edges and from metal-impedance border.

    статья (340,6 K)
  • 434. Study of energy saving measures in electrical systems for the modern era

    Analysis of various technological and management approaches developed to improve the efficiency of electrical systems. Assessment of scientific achievements in this field. Environmental consequences of using amorphous core distribution transformers.

    статья (7,9 K)
  • 435. Study of hydrodynamic luminescence in a cavitation liquid medium

    Familiarity with the main features of the experimental study of hydrodynamic luminescence in a cavitating liquid medium, problem analysis. General characteristics of important stages of development of the basic hydraulic scheme of the test bench.

    статья (1,8 M)
  • 436. Study of spectral and polarization characteristics of layered chiral media

    Study of spectral characteristics of layered chiral media using the method of matrix distribution. The calculation of the coefficients of transmission and reflection of linearly polarized electromagnetic wave on the structure of planar chiral layers.

    статья (276,8 K)
  • 437. Study on heating load calculation model using map data

    Calculation condition of heating load calculation, simulation. Evaluation of heating load calculation considering the surrounding environment. Comparison of heating load of surrounding environment by simulation. Reference value by class of housing.

    статья (1,3 M)
  • 438. Surface Plasmon-Polariton in X-Shaped Waveguides

    The study of surface electromagnetic waves propagating along а boundary line. Methods of achieving efficient excitation of surface plasmon polaritons. Properties of quasi-particles and photons interacting with elementary excitations of environment.

    статья (452,5 K)
  • 439. Switching discharge phenomena when use composite materials Cu—Cr under low voltage dc inductive load of a small power

    Use of composite materials Cu-Cr in electric contacts operating under DC low voltage loads of a small power. Сonclusions of possibility of the use of such material to control the arc to glow transformation for use in electric auxiliary switching devices.

    статья (390,4 K)
  • 440. Synchronous balanced operation of open-end winding motor drive with two isolated dc sources

    Method of synchronized pulsewidth modulation has been applied for balanced control of dual inverter-fed drive with an open-end-winding induction motor. Simulations give the behavior of dual inverter-fed systems with continuous and discontinuous versions.

    статья (551,4 K)
  • 441. Synchronous operation of five-phase converters in linear modulation region

    The study of five-phase voltage inverters, regulated in accordance with the modified synchronous pulse width modulation algorithms.The multiplication of five-phase conversion systems with continuous and intermittent varieties of synchronous modulation.

    статья (324,8 K)
  • 442. Synthesis and properties of superparamagnetic gamma-Fe2O3

    Method of nanodispersed Fe2O3 synthesis by thermal decomposition of iron citrate. Particles of synthesized materials in a state of magnetic ordering and in superparamagnetics. Influence of magnetic dipole interaction on parameters of Mossbauer spectra.

    статья (935,9 K)
  • 443. Synthesis of impedance cylinder

    The problem of synthesis for an infinite circular impedance cylinder is investigated. The law of impedance distribution must provide, with higher speed, the electromagnetic field attenuation along the structure, as compared with an conducting cylinder.

    статья (213,1 K)
  • 444. Synthesis of the intellectual system for assessment of the technical condition of electrical supply system equipment with photoelectric plants and energy storage

    A mathematical model of the system of proactive management of the condition of the electrical equipment, which involves the selection and use of various methods of intellectual analysis of information about changes in its key diagnostic parameters.

    статья (698,3 K)
  • 445. Technical diagnostics of electrical equipment based on fuzzy logic

    A mathematical model of current diagnostics based on a system of fuzzy linear equations, the solution of which makes it possible to determine the vector of priority of the possible causes of identified defects in the equipment of the power grid complex.

    статья (50,1 K)
  • 446. Temperature dependence of the isovector dipole response for asymmetric spherical nuclei:a kinetic-theory approach

    Semiclassical approach based on the Vlasov equation for finite systems with moving surface. Study isovector dipole excitations heated spherical nuclei with neutron excess. Collision integral in the approximation of the effective relaxation time.

    статья (275,1 K)
  • 447. Temperature Dependences of Losses in High Frequency Dielectrics

    The essence of temperature is one of the most important factors affecting the coefficient of dielectric loss. This paper presents the investigation of temperature dependences of the microwave dielectric losses for different mechanisms of polarization.

    статья (318,1 K)
  • 448. Temperature frequency characteristics of charge transition in the li0.5fe2.4ti0.1o4 non-stoichiometric system

    The study of temperature-frequency dependencies of the conductivity nestekhiometriya spinel. The existence of frequency dispersion of conductivity. The establishment of the value of conductivity, its dependence on the number of Fe2+ ions in the structure.

    статья (687,7 K)
  • 449. Temporal dynamics of focal point location under self-focusing of nanosecond laser pulses

    Characteristic main features of the location, velocity and the acceleration of the focal point which are determined with taking the group speed of laser radiation into consideration. Definition of the acceleration of the focal point at the exit.

    статья (347,9 K)
  • 450. Tensor of the electromagnetic field and the Lorentz force, therefore the geometry of space-time of Minkowski

    Infinitesimal transformations, Maxwell tensor and electromagnetic forces. The Maxwell field tensor. Integral curves associated with the equations of motion and the end of the Lorentz transformation. Electromagnetic force and geometry of space-time.

    статья (55,5 K)

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