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Doklady of the Academy of Sciences of Belarus, 1996, Vol.40, No.1

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Doklady of the Academy of Sciences of Belarus, 1996, Vol.40, No.1

DOKLADY OF THE ACADEMY OF SCIENCES OF BELARUS
(Doklady Akademii Nauk Belarusi)

Published by The Navuka i Tekhnika Publishing House, Minsk, Republic of Belarus

Volume 40, Number 1; January--February, 1996

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CONTENTS


MATHEMATICS

Likhoded N.A.
A new method for the construction of algorithm parallel forms. pp. 5--8

Summary: A formalized method for the construction of fixed-size parallel forms for algorithms presented by dependence graphs is proposed. The parallel forms are presented by computation graphs which are the models of two-dimensional array processors without interconnections. The problem of the minimization of the height of the parallel forms is considered.

Yemelichev V.A., Kravtsov M.K., Podkopaev D.P.
On radius of quasistability of multicriterial trajectorial problem. pp. 9--12

Summary: A new type of stability of multicriterial trajectorial problems of discrete optimization to the "small" variations of objective functions has been investigated. The old Pareto optima are saved and the new ones may appear under the consideration of this type of stability.

Kilbas A.A.
Solution of nonlinear Abel--Volterra integral equation. pp. 13--17

Summary: The uniqueness problem for the solution of one nonlinear Abel--Volterra integral equation is studied. Asymptotics of this solution near zero is found provided that free term has special power asymptotic behavior near zero. The conditions to the asymptotic solution to be exact solution of the equation are given.

Yegorov A.A.
On the class of difference schemes for solution of nonlinear parabolic equations on nonorthogonal grids. pp. 18--21

Summary: Economic iterative difference schemes for the solution of multidimensional nonlinear heat conduction equation in domains having curve-line boundary are proposed.

Shcheglov V.A.
Stability coefficient conditions for linear delay differential equations. pp. 22--26

Summary: The aim of the paper is to give new stability and asymptotical stability conditions for x(t) = a(t)x(t)+b(t)x(t-r(t)) where a(t) and b(t) may change a sign, be unbounded as well as r(f) may also be unbounded.

Laptinsky V.N.
On representation of two-periodic solutions of linear partial hyperbolic systems. pp. 27--31

Summary: The algorithm for the construction of two-periodic solutions of linear partial hyperbolic systems is worked out.

Minyuk S.A.
Zero-controllability in Banach space of linear normal systems in the case of operator with finite spectrum. pp. 32--36

Summary: The paper deals with theorems on local and global zero-controllability in Banach space of linear normal systems in the case of operators A with finite spectrum given restrictions to control.

Tuzikov A.V., Margolin G.L., Grenov A.I.
Convex polygon symmetrization and decomposition via perimetric measure. pp. 37--41

Summary: Efficient algorithms for the decomposition as well as for the determination of central, rotation, and reflection symmetry measures of convex polygons are proposed. The algorithms are based on a special representation and corresponding symmetrization transformations of convex polygons.

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PHYSICS

Burakov V.S., Raikov S.N.
Investigation of spectral line profiles by intracavity laser spectroscopy method. pp. 42--45

Summary: The experimental and theoretical profiles of atomic and ionic absorption lines, obtained by intracavity laser spectroscopy (ICLS) with broadband tunable dye lasers, are studied. The following objects, to be probed in laser cavity, have been chosen: plasmas plume, formed under action of laser radiation on a surface of aluminium target; pulsed electric discharge in helium or xenon; vapour-gas medium of thermal atomizer with impurities of barium, caesium and thallium, introduced into a furnace. The shape of line profile, its width, the shift of line centre, resolved line structure are investigated. The efficiency of the ICLS is demonstrated for diagnostics of plasma with a prevalence of different mechanisms of spectral line broadening.

Soika A.K., Boiko B.B., Vashkevich I.M.
Production of quasistatic strong pulsed magnetic fields by the use of an automatic plasma crowbar. pp. 46--49

Summary: The paper describes a new method for generating quasi-static strong pulsed magnetic fields with 0.1 s pulse duration in discharge oscillator circuits based on the radial expansion of spark gas discharge channels (a self-maintained plasma crowbar).

Bogush A.A.
On q-deformation of group vector-parameters. pp. 50--54

Summary: It is shown that in the framework of the three-dimensional vector parametrization of the classical and quantum groups the transition SL(2.C) (SU(2), SO(3.R)) ® SLq(2.C) (SUq(2), SOq(3.R)) may be reduced to the simple q-deformation of the corresponding vector-parameters.

Maskevich S.A., Sveklo I.F., Yanul A.I., Nabiev I.R., Kivach L.N., Sviridenok A.I.
Long-range action of surface enhanced Raman scattering and atomic force microscopy of annealed silver films. pp. 55--59

Summary: The analysis of the influence of thin silver film surface roughness on the parameters of resonant SERS rodamine R6G at different distances to molecule surface has been performed. Annealing was shown to lead to formation of near to uniform island structure films that significantly increases long-range action of resonant SERS.

Novikov V.P., Dymont V.P.
Electrochemical method for synthesis of diamond-like films. pp. 60--63

Summary: The carbon films of different structure types (including diamond-like) were synthesized by electrochemical method.

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CHEMISTRY

Kuvaeva Z.I., Vodopyanova L.A., Soldatov V.S.
Regularities the transport of silver ion through the strong acid liquid membrane. pp. 64--67

Summary: The Ag+ mass transport through the liquid membrane impregnated by strong acid was studied. It was shown perspectivity of using strong acid carriers for recovery valuable metals from dilute solutions.

Potkin V.I., Zapolsky V.A., Kaberdin R.V.
Nitration of 2-H-pentachloro-1,3-butadiene. pp. 68--71

Summary: The 2-H-pentachloro-1,3-butadiene nitration by mixture of HNO3 and H2SO4 (or H3PO4) has been investigated. 2-Nitrosubstituted pentachlorobutadiene has been obtained with yield of 58--60% under optimum conditions [HNO3:H2SO4 (or H3PO4)=10:1--3, t = 95--100oC]. The trichloroacroleine and trichloroacrylic acid were the by-products of nitration process. It has been found, that nitrochlorination and chlorination reactions of initial diene are proceeding when the mixture HNO3:H2SO4=1:2 is used. The scheme of by-products formation is proposed.

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BIOLOGY

Kabanova S.N., Kabashnikova L.F., Chaika M.T., Khotyleva L.V.
Characteristic properties of genetic determination of pigment indices in winter hexaploid triticale. pp. 72--76

Summary: Winter hexaploid triticale forms distinctive on morphogenesis, pigment content and crop productivity, and their hybrids F1 and F2 were studied. A reciprocal effect on inheritance of chlorophyll b content per unit of leaf area and pigment amount in the light-harvesting complex of photosystem II was observed. Maximum variation range in F2 generation was detected for the chlorophyll b content and chlorophyll a:b ratio.

Sidorovich E.A., Kutas E.N., Brel N.G.
In vitro regeneration from leaf explants of cowberries (Vaccinium vitis-idaea). pp. 77--80

Summary: Regeneration of Vaccinium vitis-idaea L. introduced varieties from leaf tissue in vitro is discussed. The approach designed for direct stem regeneration from leaf mesophyllic cells excludes the possibility for pheno- and genotypic variability contrary to those occurring during callus cultivation. It also allows maintenance of variety quality that is extremely important during clonal microreproduction.

Ipatiey V.A., Dvornik A.M., Zhuchenko T.A.
On modeling and prediction of 137Cs migration in hydromorphic soils of forest ecosystems in Belarusian Polesie. pp. 81--84

Summary: On the basis of model calculation 137Cs redistribution for the nearest and remote periods has been obtained. The estimates obtained with a great proportion of mobile forms of 137Cs presence in peats taken into account indicate a possibility of the secondary radiation contamination of freshwater through groundwater.

Rudkovskaya E.E., Sokolik A.I., Yurin V.M.
Change in transport properties of immobilized cell plasmalemma of algae under alginate effect. pp. 85--89

Summary: The influence of one of polysaccharides used for cell immobilization -- alginate -- on the transport characteristics of an algae cell plasmalemma was investigated. Immobilization of microalgae Chlorella was shown to result in 2.5-fold increase in the nitrate uptake rate in cell with polysaccharide playing a decisive role. In model experiments on Characea algae cells Nitella a number of alginate effects was revealed, an essential increase in unselective conductance of plasmalemma -- ionic leakage being a basic one. The assumption was made that alginate effects are due to inclusion of its low-molecular fractions in membrane that finally results in loosening lipid bilayer causing the observed effects.

Strumilo E.S., Rozhko A.V., Vinogradov V.V.
Sensitivity of mitochondrial NADP-specific isocitrate dehydrogenase (ICDH) from rabbit adrenals to Ca2+. pp. 90--92

Summary: Free Ca2+ and not bound to calmodulin was shown to be of regulatory significance for mitochondrial NADP-ICDH. Physiological micromolecular Ca2+ concentrations influenced the affinity of NADP-ICDH to substratum.

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EARTH SCIENCES

Lukashev V.K., Anoshko Ya.I., Sivchik V.V., Khavryuk N.N.
Nickel distribution in soils of natural and urbanized landscapes in Belarus. pp. 93--97

Summary: Against a background of low regional percent abundance of nickel for soddy -- podzolic and swampy soils in Belarus an increase in the content of this element in soils of towns (up to 16 times) and soil depletion of personal plots in countryside (2,2-fold) are observed that can affect people's health.

Azhgirevich L.F., Kruchek S.A., Levy M.G., Obukhovskaya T.G., Streltsova G.D.
Oil shales in deposits of Rechitsa River horizon of the Upper Devonian in Zhlobin saddle. pp. 98--101

Summary: Oil shales have been investigated within Zhlobin area of diatremes occurrence. They are represented by three genetic types: 1) oil shales with a clayey component; 2) oil shales with a clayey -- carbonate mineral component; 3) oil shales with carbonate (calcite) mineral component. The shales were formed in caldera lakes that preceded Rechitsa sea transgression.

Aksamentova N.V.
Magmatism and tectonic position of the Early Proterozoic Osnitsk--Mikashevichi volcanic-plutonic belt. pp. 102--107

Summary: Geological correlations and petrogeochemical features of magmatic rocks of the Early Proterozoic Osnitsk--Mikashevichi belt are described. Intracontinental position and long many-stage development of this belt under complicated geodynamic conditions are substantiated.

Vysotsky E.A., Petrova N.S.
Characteristic properties of carnallite deposit structure and composition of the Pripyat River flexure. pp. 108--113

Summary: In the Upper Famennian salt-bearing formation twelve carnallite deposits, abundant in the west and the north of the Pripyat River depression have been revealed. Close paragenesis of carnallite rocks and halopelite was typical. Carnallite crystallization took place, as a rule, in movable and intensively deflecting sites of terrain in the evaporitic basin bed.

Zhoglo V.G., Pletnev A.A.
Estimation of aquiclude filtration properties for forecasting underground water quality near a source of pollution. pp. 114--117

Summary: A new effective method of assessment of aquiclude filtration properties in bedded stationary underground water flow is suggested in the article.

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TECHNICAL SCIENCES

Yashcheritsyn P.I., Shipko A.A., Kheifets M.L., Popok N.N.
Improvement of production systems on the basis of creating conditions for self-organization of technological processes and objects. pp. 118--121

Summary: The paper deals with production system development that provides complex automatization, the stages of the production analysis being proposed for the purpose of creating conditions for self-organization of production objects and processes.

Kuzei A.M.
Interaction in the Al--Cu--Sn system under superfast cooling. pp. 122--125

Summary: The methods of calorimetry, electron microscopy were used to study an interaction which occurs in the Al--8Cu--3Sn alloy produced by a centrifugal alloy atomization. It is established that a free tin is not present in the alloy. The formation of three-component compounds in Al-rich region is possible due to changing a mechanism of an interatomic interaction in a system which has an excess free energy.

Migun N.P., Azuni M.A.
Characteristic properties of mass transfer in line-end conic immersed capillaries. pp. 126--129

Summary: The phenomenon of two-way filling of conical capillaries with water bidistillate and ethanol has been studied experimentally. Some new peculiarities of this phenomenon clearing up its physical nature were obtained. It was established that under some conditions the phenomenon was accompanied by air bubble displacement towards the channel exit.

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