In this paper we discuss electrical manipulation of a spin an electron in quantum dot within a weak magnetic field. Approach to describing this process is based on Lewis — Riesenfeld dynamical invariants. Necessary conditions of a spin-flip process are derived.
We propose a simple algebraic method for constructing exact solutions of equations of two-dimensional hydrodynamics of an incompressible fluids.The problem reduces to consecutively solution three linear partial differential equations for a nonviscous fluid and to solving three linear partial differential equations and one first-order ordinary differential equation for a viscous fluid.
The structure of filtration flows in two-dimensional laying media is studied. The definition of positive and negative flows is giving. The relations for complex potentials in media with common boundary are receiving. There are employing for founded solutions some problems.
Presented the results of the synthesis and analysis of the system of temperature control for the camera kiln electrode products. By using Simulink held simulation of control systems with man — operator, with a parametrically оптимизируемым regulator and neuron network predictor controller. Defined indicators of the quality of the transient processes camera kiln for different variants of functioning of the system. Shows the advantage of using neural networks predictive controller for control of thermal processes.
Numerical experiments are performed to investigate the dispersion distortions of chirp pulses propagating in the ionosphere with taking the three-dimensional non-uniformity, anisotropy, and dispersion of ionosphere in dependence on geophysical conditions into account. Propagation, absorption,and the time delay of ordinary and nonordinary waves are analased.
The paper presents an analysis of the spectra of atmosphere aerosol variations and variations Total Electron Content in the ionosphere (TEC). Monitoring of atmospheric aerosol performed with using of the two-wavelength (532, 1064 nm) atmospheric lidar (LSA-2S). Ionospheric TEC parameter determined from the observation of the navigation satellites signals GLONASS (Leica1200). The observations in the lower atmosphere and ionosphere were executed simultaneously in the period February — March 2012. Analysis of the observations showed that during the period of solar terminator passing in the lower and upper atmosphere, there are variations of parameters with periods close to the period Väisälä — Brunt in the lower atmosphere. It is assumed that such disturbances are excited in the lower atmosphere and propagate into the upper atmosphere. It is assumed that the disturbances with periods close to the period of the Väisälä — Brunt can take an important part in the implementation of dynamic relationships of lower and upper atmospheric layers
The article presents the main investigation results of the structural and magnetic parameters of a series of samples formed on single-crystal (MgO) and on amorphous substrates Si/SiO2 structures. Were assessed quality indicators such as the paramagnetic phase, the presence of impurities, and an analysis of the functional properties through continued Gilbert was done. The radiophysical methods features for the diagnosis of prospective structures were shown.
Structures of new type of sulfonamide preparations were determined complex using methods of IR spectroscopy and 1H NMR spectroscopy. This methodology proposed as a general approach for structural identification of the pharmaceutical substances.
In the real work the solution of a problem of determination of parameters of the radio impulse reflected from an ionosphere is considered. The noise component, and also the multibeam structure of a signal arising at formation two magnetoionic component is thus considered. Expression for definition of probability of reception of a radio impulse in these conditions is received.
The structure of station of vertical sounding "Vector" and results of correlation data processing is presented. For vertical sounding of an ionosphere the difficult signal in the form of the М sequence, containing 16 positions is used. Ways of further modernization of station are shown. Them treat expansion of opportunities of determination of parameters of signals at twofold reflection from an ionosphere.
In the real work questions of sounding of an ionosphere are considered by difficult signals. Efficiency of use of signals with big base on an alignment with signals with base about 1 is estimated. It is shown that when using difficult signals it is possible to lower significantly capacity at preservation of invariable level of permission.
In the work the mechanism of compound harmonic signal and noise through the bistable system which role carries out Schmitt's trigger is considered. Dependence of signal-to-noise ratio on different factors is shows. Necessary conditions for ensuring increase of the signal-to-noise ratio at the output of the system are defined. The decision on practical implementation of the effect in electronic circuits of various purposes is submitted.
Possibility of use in antenna systems of an additional dielectric layer is considered. At the expense of use of the phenomenon of «shortening» of an electromagnetic wave in environments with high dielectric permeability there is a possibility of creation of the integrated antennas on a surface of bearing designs of mobile objects.
A comparative evaluation of the model and the theoretical curves of the probability of bit error at the output of the unbounded receiving device of MSK-signals in presence of white Gaussian noise. It is shown that this method of signal processing provides declared value of noise stability in critical values of SNR region compared with existing demodulators.
There is a quantum statistical model of prototropic tautomeic transformation caused by vertical transition between different adiabatic potentials with two minima divided by potential barrier offered. Formula for the probability function defining time of tautomer transformation without regard to vibronic relaxation is received.
Group of scientists of the Immanuil Kant Baltic Federal University (I. Kant BFU) in 1989 developed a three-dimensional code to study equatorial F-spread (EFS) studying. The Naval Research Laboratory (NRL, Washington, DC, USA) in 2008 developed a three-dimensional code to study equatorial spread F (ESF) also. Comparison of these models is made. Differences in number of ions and the accounting of electrons speeds and inertial terms are found.
Research of almost periodic functions with values in Banach space proceeds. The concept of the multiplicator by means of which the theorem of integral from almost periodic function is proved is entered.
Features of architecture and creation of robotic system AR-600 are described. The main objectives of loudspeaker of biped walking and methods of their decisions are considered. Calculations of necessary corners at movement and time of their performance are presented. As the question of creation of the filter of Kalman for system aksilerometr-giroskop-robotic system is considered.
The problems that arise during the transition from functional to processmanagement company, their solutions, an algorithm for the development of business processes.
The basic principles of geological interpretation of the scattered waves field are represented. One the basis of scattered waves sections and map analysis had made the forecast of fracture cavernous reservoirs. These reservoirs are very perspective object for oil deposits exploration. The researchers are based on original prestack migration method — Common Scattering Point, which makes it possible to get two independent time cubes: reflected waves cube and scattered waves cube. The last are generated in fractured zones.
The model of microseismic noise in block structuring rocks is offered. Results of numerical researches of the signal form and spectral structure of microseismic noise in productive block structuring layers, dependence of the correlation radius of mid-frequency noise on the receivers position in relation to a layer generating noise are resulted. Recommendations about algorithms of the useful signal allocation and a location of internal seismic events on the basis of the inverse kinematic problems decision are made.
The technology of large spatial data volumes pre-processing and publication using different methods to optimize access to the raw data to achieve optimal performance mapping system based on the open source software. The methods for optimizing very large scale spatial data across different scales of data generalization and publication of fragmented images
Statement of two direct problems of numerical modeling for the simple one-pass overburden rehandling systems and the complicated multiple-pass overburden rehandling systems and one return statement of problem of numerical modeling (for the complicated double-pass systems) are presented
In this paper we develop а numerical algorithm for solving inverse dynamical problem: recovering two parameters of the acoustical medium (density and compressibility modulus) by boundary measurements (response operator). The solution is based on a linearized version of the Boundary Control method: the response operator explicitly determined some bilinear energy forms w. r. t. boundary controls. We use linearized presentations of these forms w. r. t. to background. The results of numerical experiments are represented.
In this work regional tasks for one class of the equations arising in the theory of distribution of light in the turbulent environment are studied. In work sufficient conditions are indicated to coefficients at which the objective without initial data for the nonclassical equations is correct in S. L. Sobolev's spaces.
In this paper we develop an algorithm of numerical solution of the inverse dynamical problem about speed of sound reconstruction in horizontally layered acoustical medium. The solution is based on linearized version of the Boundary Control Method. The inverse data is the response at the single boundary point from the boundary point source; the probe pulse is the Ricker wavelet. The results of numerical modeling for two-dimensional domain are presented.