of National Academy of Sciences
of Tajikistan

News of the National Academy of Sciences of Tajikistan.
Department of physical, mathematical, chemical, geological and technical sciences

Известия Академии наук Республики Таджикистан. Отделение физико-математических, химических, геологических и технических наук, №4, 2015 г.

Article title and abstractPages
Полный текст статьи

Shabozov M.Sh., Mehmonzoda S.N.
On approximation of functions of two variables by polyhedral functions
In this paper for the some functional classes, the exact estimate error approximation of the functions of two variables by polyhedral functions was found.

Ключевые слова: многогранная функция; модуль непрерывности; выпуклая функция; решетка узлов; polyhedral functions; module of continuity; convex function; lattice of node.

Полный текст статьи

Tukhliev K., Murodov K.N.
Exact estimates of the rate of convergence of Fourier-Bessel and the values of K-functional
Exact estimates of the rate of convergence of series Fourier-Bessel Bessel functions of the first kind for some classes of functions characterized by generalized modulus of continuity are found. Using the results, we calculated the exact values of K-functionals.

Ключевые слова: функция Бесселя; наилучшие приближения; K-функционал; обобщенный модуль непрерывности n-го порядка; ряд Фурье-Бесселя; Bessel function; best approximation; K-functional; generalized modulus of continuity of n-th order; ranks of Fourier-Bessel.

Полный текст статьи

Khaitov T.I.
Finding the proper time unit oscillatory process
The algorithm for determining the proper time unit of oscillatory process is given in the article. The algorithm consists of 4 independent parts, each of which is framed as a complete module.

Ключевые слова: процесс; астрономическое время; собственное время; process; astronomical time; own time.

Полный текст статьи

Kokhirova G.I., Litvinov S.P., Hamroev U.H., Ahmetzyanov M.R.
The results of astrometric reduction of the superbolide 23 july 2008
The astrometric reduction of the two images of the superbolide obtained at the Gissar astronomical observatory and Hulbuk on 23 July 2008 was fulfilled. The results of determination of the atmospheric trajectory and coordinates of apparent radiant of the superbolide are presented. The coordinates of the terminal point of the superbolide trajectory are located near Tursunzade.

Ключевые слова: суперболид; измерение; координаты; траектория; радиант; superbolide; measuring; coordinates; trajectory; radiant.

Полный текст статьи

Ibadinov Kh.I., Safarov A.G.
Some laws abnormal tail formation in the comets
In this paper observational data on the anomalous tail of the comet and the catalog were collected. On the basis of statistical education directory studied anomalous tail of comets, the parameters of their orbits. In particular, the dependence of the anomalous appearance of the tail on the heliocentric r and geocentric distance comet r , from perihelion distance q , the inclination of the plane of the comet's orbit to the ecliptic plane i and from the ( r - q ), the dependence of the anomalous tail length S of the absolute magnitude H and perihelion distance q were consider.

Ключевые слова: кометы; каталог; аномальный хвост; статистическое исследование; comets; catalogue; abnormal tails; statistical research.

Полный текст статьи

Muminov Kh.Kh., Shokirov F.Sh.
Dynamics of interaction of domain walls in (2+1)-dimensional non-linear sigma-model
By numerical simulation the dynamics of interactions of 180-degree Neel type domain walls in (2+1) dimensional O(3) vectorial nonlinear sigma model is investigated. Are obtained numerically: new solutions in the form of domain walls with the rotation of the vector of A3 field in isotopic space; long-range model of interaction of the domain walls; oscillating (bionic) model of the bound states of the domain walls.

Ключевые слова: связанное состояние доменных стенок; неёловская доменная стенка; О(3) векторная нелинейная сигма-модель; дальнодействие доменных стенок; динамика взаимодействия; bound state of domain walls; Neel-type domain wall; О(3) nonlinear vectorial sigma-model; long-range interactions of domain walls; dynamics of interaction.

Полный текст статьи

Akdodov D.M.
Determining coefficient bulk viscosity and the bulk elasticity modulu on the basis generalized of ion-molecule systems
On the basis of the generalized interaction energy, which consists of the sum of ion-ion, ion-molecular and intermolecular interaction potentials analytical expressions for the coefficient of bulk viscosity and bulk modulus are obtained. Numerical calculation for aqueous electrolyte solution of NaCl at a fixed frequency in a wide range of changes of temperature and concentration are carried out.

Ключевые слова: объёмная вязкость; объёмный модуль упругости; потенциал межмолекулярного взаимодействия; радиальная функция распределения; bulk viscosity; bulk modulus of elasticity; the potential of intermolecular interaction; the radial distribution function.

Полный текст статьи

Salikhov T.Kh., Khojaev Yu.P.
The theory of generation of the first harmonic of photoacoustic signal of the bilayer semitransparents samples
The theory of generation of the first harmonic of a photoacoustic signal by bilayer semitransparent samples has been presented. The general expression for the acoustic oscillations of the pressure in a gases medium is obtained. The expressions for the amplitude and phase of the signal for the most interesting cases and the dependence of these values on the modulation frequency of the incident laser beam are found.

Ключевые слова: фотоакустика; тепловая нелинейность; двухслойные системы; нелинейный фотоакустический отклик; photoacoustic; thermal nonlinearity; two layer systems; nonlinear photoacoustic responses; first harmonic.

Полный текст статьи

Kodirova Kh.I., Shukurov T., Nazarov B.I., Abdullaev S.F.
IR-spectroscopy of dust aerosol samples and soil of the dust storms transformation zone
Precipitation of dust aerosol (dust storms) collected from different areas of distribution, as well as in remote areas, where only achieved fine particles by IR spectroscopy in the frequency range of 4000-400 cm were investigated. In order to determine the source of generaton operational DS (DH ), the infrared spectra of the likely areas of soil formation were also studied. The results showed that a comparative analysis of the IR - spectra precipitation DS (DH ) and soil likely areas to determine if they match areas of determination of DS (DH ).

Ключевые слова: ИК-спектр; аэрозоль; пылевая мгла; пылевая буря; метод ИК-спектроскопии; валентные колебания; деформационные колебания; углеводородная группа; органика; IR-spectrum; the aerosol; dust haze; dust storm; the method IR-spectroscopy; stretching vibrations; bending vibrations; hydrocarbon group; the organic.

Полный текст статьи

Degtev M.I., Aminjanov A.A., Alikina E.N.
Complexation of scandium ions (III) and yttrium (III) with amino methylated derivatives of 1,2-dioksiantrahinon
Alkilaminometil synthesized in the 3-position derivatives of 1,2-dioksiantrahinon (DA). Investigated their physical and chemical properties and complexing ions on the example of scandium and yttrium. Introduction into the molecule of the radical alkilaminometil DA basified reagents, their solubility in organic solvents and pH shifts maximum complex formation in a ratio Me: L = 2: 1 in a more acidic range. Calculated instability constants and molar absorbance coefficients.

Ключевые слова: 1,2-диоксиантрахиноны; растворимость; алкиламинометилированные производные; оптическая плотность; комплексы; скандий; иттрий; константа нестойкости; коэффициент светопоглощения; 1,2-dioksiantrahino; solubility; alkilaminometilirovan derivative; optical density; complexes; scandium; yttrium; constant instability; the coefficient of light absorption.

Полный текст статьи

Azizqulova O.A., Solehova G.N.
Cоordinating compounds of zincum (ii) with 3-methyl-1,2,4-triazoltiol-5
In ethanol synthesized novel coordination compounds of zinc (II) 3-methyl-1,2,4-triazoltiolom-5. The composition and physico-chemical properties of the synthesized coordination compounds established by IR spectroscopy, potentiometric and conductometric. It was shown that 3-methyl-1,2,4-triazoltiol-5 coordinated to the zinc (II) as a monodentate or bidentate ligand.

Ключевые слова: 3-метил-1,2,4-триазолтиол-5; металлоферменты; цинкпротеин; переходные металлы; координационные соединения; бидентатный лиганд; 3-methyl-1,2,4-triazolthiol-5; metalloenzymes; zinc; protein; transition metals; coordinating compounds; bidentate ligand.

Полный текст статьи

Aslzoda E.M.
Drilling agents and their value when driving salt-bearing deposits in difficult geological conditions
The article deals with the preparation of drilling mud with the addition of different composition of chemicals that will promote accident-free salt-bearing strata powerful in difficult geological conditions Afghan-Tajik basin.

Ключевые слова: Афгано-Таджикская впадина; скважина; соленосные отложения; соль; глинистый и тампонажный растворы; химический реагент; хроматы; бихроматы; гипан; метас; Afghan-Tajik basin; parametric well; chromates; dichromates; gipan; metas; salt; salt-bearing deposits; chemical reagent; clay; cement slurry.

Полный текст статьи

Mamadvafoev M.M.
On petrochemical magmatic formations of Fan-Darya river basin (Zeravchan ridge)
For the first time the material contains data on petrochemistry of inversion (С2-3), and partially orogenic (Р1), magmatic rocks of Fan-Darya basin, terrestrially associated with gold-sulphide skarn-rare metal (W, Sn) are given.

Ключевые слова: Зеравшанский хребет; бассейн Фан-Дарьи; магматические породы; гранитоиды; гранодиорит-порфиры; керсантиты; оруденение; петрохимия; Zerafshan ridge; Fan-Darya Basin; magmatic rocks; granitoids; grandiorite-porphyry; kersantites; ore formation; petrochemistry.

Полный текст статьи

Sabirov A.A.
The taxonomy and phylogenesis of the paleozoic calcareous foraminifera of the order Earlandiida
In the article on the basis of analysis of the word literature and author’s research the taxonomy of the order Earlandiida has been worked out and its phylogenetic diagram constructed.

Ключевые слова: фораминиферы; отряд Earlandiida; систематика; филогения; палеозой; фораминиферы; отряд Earlandiida; систематика; филогения; палеозой; foraminifera; Earlandiida; taxonomy; phylogenesis; Paleozoic.

Полный текст статьи

, , , ,

Ключевые слова: .