Mordovia University Bulletin

12-16

Authors: A. O. Schukina, Y. S. Kurakina, M. N. Ershkov, S. A. Solokhin, S. N. Smetanin

In the paper we are presenting the experimental results of the blue-laser generation by nonlinear frequency conversion of Nd 3+:YAG laser on the 1,34 цш wavelength. Blue radiation at the wavelength of 0,446 цгп was realized by sum-frequency oscillation under nonlinear mixing of radiation at wavelengths of the main (1,34 |im) and the second (0,67 |im) harmonics in DKDP crystal. It is shown that pulse energy of the blue radiation achieved 2 mJ with pulse duration of 20 ns and conversion efficiency of 2 %.

28-43

Authors: V. I. Tchepurnov.

Heteroepitaxy layers of silicone carbide on silicone substrate is one of the most perspective material for the high-temperature- and nuclear-proof electronics. Solidphase process of endotaxy of silicon carbide is supported by Si-phase turning into SiC-phase chemically taking place in the atmosphere of hydrogen and hydrocarbon under the temperature range of 1360 to 1380 ºC and under normal atmospheric pressure. All the system of .solidphase process assumes single defect formation, caused by natural growth processes, affected by processes of another origin, caused by doped, for example.The aim of this research is to analyse all the opportunities of the guidance and the forecasting of this system behaviour. Besides, the concentration of thermal point defects of various origin on silicone substrate depending on the type of its current under the circumstances of isovalent doped of carbon has been theoretically studied in this article.

50-57

Authors: N. E. Fomin, V. I. Ivlev, V. A. Yudin.

The influence of impurities and temperature on the resistance of aluminum and copper was considered from the position of the electron theory of metals and order of their atomic structure. It was concluded that the main factor of influence of impurities on the electrical conductivity of copper and aluminum is cross-section for scattering. On the basis of the two-band model of the electronic structure it was suggested that the impurities have a different effect on the cross-section for scattering of electrons and holes in the polyvalent metals and this may lead to a rather complex temperature and concentration dependence of these properties.

64-68

Authors: A. A. Burtasov, M. K. Pryanichnikova, E. V. Bezrukova, L. G. Tichonova, B. S. Tanaseichuk.

The constants of dissociation of dimers 2-(p-allyloxyphenyl) - and 2-(p-propargyloxyphenyl)-4,5- diphenylimidazolyls was difined. It was shows that the equilibrium of dissociations process is largely determined by a steryc factor.

76-80

Authors: I. I. Bayneva, V. V. Baynev.

We have described the aspects of energetic efficiency and conservation in Russia, the features of modern illuminants and their role in energy conservation.

85-88

Authors: A. A. Gor’kov.

The paper discusses some aspects of mathematical modeling of input devices of glowing LED panels. We also have estimated the possibility of employment of different objective functions for optimization of light distribution input devices.

98-103

Authors: A. A. Ashryatov

In the article we have determined a cause of the periodic flashes of light in compact fluorescent lamps in lighting devices where switches have integrated light indicator in neutral position. Investigation of electronic ballasts showed that some manufacturers of electronic ballasts on its printed circuit board provides space for mounting the thermistor, but there is no thermistor.

107-112

Authors: S. А. Panfilov, V. M. Kalikanov, Yu. А. Fomin, O. S. Panfilova.

The paper discusses the research results of competitiveness of phase uninterruptible power supply with capacity of 1000 watts. Quality control unit was used for comparison. Evaluation criteria are based on the preferences stated by consumers. The article contains recommendations for the direction of works to improve the competitiveness of domestic products.

119-124

Authors: V. G. Shchukin.

Inverters parallel operation with inertia-free forming of reference sinewaves on common load-bus is considered in this article. The research includes description of synchronization principle, general invertor control algorithm, curves of currents and voltages existing on scheme components and power consumers which were read during simulation.

132-138

Authors: A. G. Smol’yanov, Ye. G. Smol’yanova.

The paper provides the clipping algorithm for planar convex polygon problem. The algorithm is based on the classification of the vertices of an arbitrary planar figure relative to a convex polygon. In many cases this classification allows to avoid unnecessary calculations such as calculating of coordinates for points of the intersection of arbitrary figure sides with polygon sides.

148-153

Authors: M. V. Chugunov, A. V. Schekin.

An approach to creation of software, based on API SolidWorks so, that it extends the basic SolidWorks functionality, concerning 3D-modelling for mechanical transmissions elements. 3D-model has been created automatically, according to user defined parameters. API (Application Program Interface) is the general tool for this problem solving. Results: It is shown, that considered approach is effective for SolidWorks users for following reasons: fully automated style for this model creation, not very expensive analysis for the stress-deformed behavior, based on 1D FEM-model.

161-164

Authors: A. V. Schekin, S. P. Sul’din, E. V. Mitin.

This article describes a method for post-processing, which provides an efficient opportunity of including machine cycles in NC-programs. We have considered the possibility of the automated breakdown of machining allowance to geometrical figures of machine cycles.

171-176

Authors: V. V. Baynev, I. I. Bayneva.

The article describes the features of the light devices, light-distributing devices, analyzes the problem and possible solutions for their calculation and design, considers the math- ematical models used in the light and luminaire design with the mirror reflectors, the principles of work with the created software for the automated modeling and design of the light devices.

182-185

Authors: Yu. S. Igol’nikov, O. Yu. German.

Today such systems in the Russian Federation are not used universally, usually they are applied in networks with tension with above 10kV. This lay-out allows to solve a problem use of jet power jacks, designed for a low voltage and big currents. In comparison with existing analogs which are let out in Former Soviet Union and abroad, this complex differs with a number of technical solutions, both in the field of power electronics and in the field of microprocessor control systems.