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On the basis of generalized new data on regional and thematic researches, the main problems involved with the evolution of the Paleoasian ocean and structure of the huge Ural-Mongolian fold belt are considered.
Some segments of the Ural-Mongolian fold belt formed at different stages of the evolution of the Paleoasian ocean developed in a specific fashion. Hence, Altaides, Kazakhstanides, Tien-Shanides, Uralides, Salairides, and Baikalides may be recognized within its limits. At the same time, the main stages of development of separate structures are well correlated with each other, and the paleomagnetic data and palinspastic reconstructions confirm the common evolution of the Paleoasian ocean in the range of 950-250 Ma.
The large stages of reconstruction and closure of the Paleoasian ocean are involved with superplumes, which appeared in the Permian-Triassic (Siberian), in the Devonian (European), and, possibly, in the Early-Middle Ordovician. These plumes also favored the synchronization of events in separate parts of the Paleoasian ocean. The best synchronization is observed in the periods of superplume appearance at about 485, 360, and 245 Ma, and about 120 Ma in the Mesozoic, at intervals of 120 myr. The presence of these superplumes is hypothesized in the Late Precambrian as well, in a lapse of 120 myr, thus reaching the best synchronization at around 610, 730, and 850 Ma. In the periods between these major plumes, smaller local plumes appear at an interval of about 30 myr and, correspondingly, local synchronization of tectonic processes occurs (rearrangement of island arcs and related local collisional processes, exhumation of eclogites and glaucophane schists, reflected in the maxima of isotope ages).

We substantiate theoretically that the Paleozoic-Early Mesozoic Ural-Pai-Khoi-Novaya Zemlya fold belt recognized as Uralides are not analogous to Hercynides (Variscides) and the preceding Late Vendian Timan folded structures and lower structural units of the Urals recognized as Timanides are not analogous to Baikalides. Uralides and underlying Timanides are noticeably distinguished from the other rocks of the Ural-Mongolian fold belt. The Ordovician rifting and subsequent drift of continents, resulted in the Paleouralian ocean, seriously disturbed the initially intimate relationship between Timanides and European Cadomides and brought the former into a closer proximity to Baikalides, which formed at a different time. The subsequent evolution of Uralides also proceeded mainly in antiphase with more eastern, initially remote parts of the Ural-Mongolian belt. However, from Carboniferous to Middle Jurassic, during the formation of Pangea, the East European, Kazakhstanian, and Siberian continents underwent collision, and new intimate structural relationships were established within the Ural-Mongolian fold belt.

A theoretical study is given to a spatial-temporal development of a spherical glow discharge of low pressure using the self-consistent hydrodynamic approximation. The model includes non-stationary continuity equations for electrons and ions in a drift-diffusion approximation and the Poisson equation for radial electric field. The system of equations was solved by relaxation method for the entire inter-electrode gap using an implicit numerical scheme. The result is a time-developing pattern of spherical discharge. In calculation of stationary distributions, the Ohm law was used as a feedback between the discharge voltage and the current. It was demonstrated that for the spherical discharge, as distinct from a tube discharge, the condition of quasi-neutrality is not valid for the entire zone from the anode to cathode.

Investigation results of a bubbly gas-liquid flow in an inclined rectangular channel are presented. The angle of channel inclination was varied from vertical to horizontal. Profiles of velocity, local void fraction, and wall shear stress were measured using the electrodiffusional method. A strong effect of the channel inclination on flow parameters was determined. Maximal shear stress on a wall and deformation of the liquid velocity profile were observed over the range of channel inclination angle of 30 50?. Profiles of liquid velocity were calculated using the work by Sato et al. (1981). Sato

Results of numerical simulation of heat and mass transfer process in a low-temperature heat pipe with two local sites of heat release are presented. Distributions of hydrodynamic and thermodynamic parameters are obtained.

The method for determination of boundary conditions at the interface between two media with different refraction indexes is presented in application to exact and approximate approaches for calculation of radiant heat transfer.

The analytic form for the representation of radiation configuration factors of internal surface of infinite spiral is studied with regard for peculiarities of axisymmetric radiating systems and the part of radiant energy

The heat capacity of the composite material TiC

The method of chain analogy was used to analyse the electric parameters of a high-frequency hybrid plasmatorch of decreased pressure which works in a weakly-pumping regime. The results of this analysis performed in one-electron approximation are in a good agreement with the experiment, allow to formulate a number of requirements for the active element basis of high-frequency generators.

An approach is proposed for optimizing the parameters of thermal power and power technology installations with regard for a random character of the input data, which is based on accepting the efficiency criterion with a given level of security as the objective function. The algorithm for solving the problem under study is presented. The approach is illustrated by the example of optimization of the power technology installation for methanol catalyst synthesis and electric power production.