A.A. Zaharov

Software modeling longitudinal magnetic field distribution magnetic focusing systems

The article deals with the software simulation of the longitudinal distribution of the magnetic field magnetic focusing systems (MFS), based on the summation of different types of wavelet functions (upgraded wavelet “French hat”, the summation of unipolar wavelet function Gauss second-order shift, the summation wavelet-functions “French hat” and Gaussian first order). Simulation of various types of MFS is divided into two main stages. The first step is modeling of longitudinal magnetic field distribution of the cell of MFS (single magnet). The second stage is the modeling of longitudinal magnetic field distribution of MFS given the previous model (single magnet), which is implemented using real mechanism of the formation of the distribution.

Software for recognition of a rectangular pulse signal

The article deals with the software for recognition of rectangular pulse signals with different pulse duration and amplitude, consisting of a head module and the three modules that implement methods on the statistical characteristics — arithmetic mean, variance and standard deviation, based on the continuous wavelet transform (Haar wavelet). A rectangular pulse signal is specified as a sequence of characters — “zeros” and “units”. Recommended for recognition of a rectangular pulse signals with different pulse duration and amplitude, consisting of 10 characters, use the technique based on RMS, as the smallest number of levels for the recognition it gives the best result.

Search the optimal combination of the geometric parameters of the ring magnet with a trapezoidal cross-section

The article attempted to calculate the optimal combination of geometric parameters of an annular magnet with trapezoid cross-section. For this results value of the magnetic induction was calculated for a magnet with a trapezoidal cross-section with different thicknesses and different combinations of geometric parameters. The dependence, according to which one of the best combinations of geometric parameters of the magnet with a trapezoidal cross-section is a magnet with large thickness.

Study of principle of operation of P-I-N diode with application of the fundamentals of wavelet analysis

Study of p-i-n diode with application of wavelet transform to analyze the characteristics. Includes laboratory workshop, including laboratory stand with a description of the individual components of the installation, allowing to obtain the characteristics of p-i-n diode for further study using wavelet analysis. The article analyzes data using wavelet transform based on the upgraded software product «labpraktikum_osnov_wavelet», consisting of several modules, among which «Building the periodogram and spectrogram», «Continuous wavelet transform», «Calculating wavelet coefficients at scales 1 and 9 at different steps of the wavelet transform».

Selection of the optimal aspect ratio of individual magnets in MPFs

The paper analyzes the dependence of the axial condition of the magnetic field of separate magnet when the geometric dimensions due to the possible spread of technology in order to select the optimal technical correspondences, defining their minimal impact on the change in the magnetic field.

The logical design process automation control systems

The article presents the process of logical design automation control systems that can be used with automatic management of various technological processes, working machines, mechanisms, instruments, devices. The authors also provide an opportunity to adapt the programmes to the task of pattern recognition, which may make electronic equipment, devices, and much more.

Investigation of influence of different parameters on results of probe oxidation

Fabrication of nanosized lines on magnetic films is of special interest because such lines can be used as nanosized elements for fabrication of planar tunnel junctions [1] or periodic planar structures that can serve as surface phononic crystal (SPC) for hypersonic frequency range that could be controlled by magnetic field [2]. Probe oxidation is one of the perspective tools to create such nanostructures. It is based on the electrochemical reaction of oxidation in the water meniscus under the sharp tip of the atomic force microscope (AFM). The reaction is stimulated by applied voltage between the tip and the sample [3]. There are only few works on probe oxidation of Ni [1, 4-5] and FeCo films [5]. But there is no investigation on influence of wide range of parameters on oxidation results. In this work investigation of dependences of probe oxidation of ferromagnetic metal films Ni and FeCo on different probe oxidation parameters is presented. Definition of optimal process parameters for fabrication structures with certain sizes was done.

Theorem design of test structures matrix type as systems of recognition of images, events, signs, devices

Article use this procedure to build composite test matrix structures as pattern recognition systems. The authors presented the theorem transformation test tracks in the expert system. Also see logistic models of such structures.

Sensors of magnetic field based on magnetoresistive effect

This article describes sensors of magnetic field based on magnetoresistive effect. Learning magnetoresistive effect is actually scientific research work now. Magnetoresistive sensors on ferromagnetic structures are divided into Anisotropic Magnetoresistor (AMR), Giant Magnetoresistor (GMR), Spin-Dependent Tunneling (SDT) Magnetoresistor. Using GMR and SDT sensors perspective to create highly sensitive and integrated measuring electronic devices.

Magnetoresistive sensors on information-measuring and managing systems

This article describes magnetoresistive sensors as components of information-measuring and managing systems. GMR and SDT sensors with processing logic are used to development modern high sensitivity systems for measuring, control and managing technological processes including medical researches.