Известия Академии наук Республики Таджикистан. Отделение физико-математических, химических, геологических и технических наук, №3, 2016 г. |
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Скачать | Tukhliev K. | 7-14 | About the widths of some classes of folds |
Found the exact values of n -widths of convolution classes, asked various modifications of the modules of continuity of m -th order in the metric L . |
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Ключевые слова: наилучшие приближения; периодическая функция; свёртка; тригонометрический полином; модуль непрерывности m-го порядка; n-поперечники; best approximations; periodic function; convolution; trigonometric polynomial; module continuity of m-th order; n-widths. | |
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Скачать | Beknazarov J.Kh. | 15-23 | The best approach function sums Fourier-Chebyshev and diameters some function classes |
In the Hilbert space including Chebeshev's weight were found exact inequalities of Jackson-Stechkin for special module continuity m's order, received recurrent's formula from Steklov function. For some of classes function exact value of different n -widths are found. |
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Ключевые слова: наилучшие приближения; полиномы Чебышёва; обобщённый модуль непрерывности -го порядка; коэффициенты Фурье-Чебышёва; n-поперечники; best approximation; Chebyshev polynomials; generalized modulus of continuity of m-th order; Chebyshev-Fourier coefficients; n-widths. | |
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Скачать | Konunova U.Kh. | 24-31 | Approximation of continuous functions by linear interpolation splines (polyline) |
In this paper sum old results on simultaneous approximation of functions and theirs derivatives of first order by linear interpolation splines are transferred to the space L [0,1], 1 ≤ p ≤ ∞ . |
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Ключевые слова: линейные интерполяционные сплайны; модуль непрерывности; классы функций; linear interpolation splines; modulus of continuity; classes of functions. | |
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Скачать | Usmanov N., Shavkatzoda S. | 32-43 | Singular boundary value problem of liner conjugation for equations type of elliptic systems |
From below research we can make following conclusion: the number of solutions in functions classes, unbounded on the contour does not change on presence of conjugate zeros of problems coefficients and it decreases with summarized order of all poles. In particular if the index number is less then summarized order of poles, than the task is unresolvable. |
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Ключевые слова: аналитическая функция; эллиптическая система; нуль; полюс; условия Гёльдера; analytic function; elliptic system; zero; pole; Holder condition. | |
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Скачать | Akdodov D.M. | 44-51 | Study of the dynamic acoustic parameters electrolyte solutions |
On the basis of unified microscopic theory based on the contributions of translational and structural relaxation processes obtained general expressions for the dynamic propagation velocity and absorption coefficient of shear and longitudinal waves, as well as the thermal wave in electrolyte solutions. |
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Ключевые слова: релаксационные процессы; скорость распространения сдвиговых волн; скорость распространения продольных волн; скорость распространения тепловых волн; коэффициент поглощения сдвиговых волн; коэффициент поглощения продольных волн; коэффициент поглощения тепловых волн; relaxation processes; the propagation velocities of the shear and of the longitudinal waves; the velocity of the propagation thermal waves; the absorption coefficients of the shear and of the longitudinal waves; absorption coefficient of thermal waves. | |
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Скачать | Tuichiev Sh., Rashidov D., Shoimov U., Tuichiev L., Aknazarova Sh. | 52-61 | Effect of external influences on the change of supramolecular morphology of elastomers |
X-ray diffraction, optical microscopy, thermal physics and mechanical tests were used to study the changes in the supramolecular structure of samples of synthetic rubber SKI-3 under influence of external factors. A clear reversible transitions between the amorphous and crystalline-amorphous state under the influence of factors such as temperature, strain, radiation and modification of fullerene Cwere studied. |
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Ключевые слова: эластомер; рентгенография; оптическая микроскопия; облучение; термодеформационное испытание; elastomers; X-ray; optical microscopy; thermal physics; irradiation; thermodeformation test. | |
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Скачать | Murtaza I., Karimov Kh.S., Akhmedov Kh.M. | 62-66 | Influence of humidity to mobility of charge carriers in organic semiconductor PTCDI-C |
In the article the influence of humidity to the mobility of charge carriers in n-type organic semiconductor N,N’-dioctyle-3,4,9,10-perylene tetracarboxilic diimiide (PTCDI-C) was studied. For this purposed on the base of this semiconductor it was fabricated thin film transistor. It was shown that the mobility of charge carriers decreases with increase of humidity , that is considered due to the increase of concentration of traps in the semiconductor. On the base of this transistor high sensitive humidity sensors can be fabricated. |
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Ключевые слова: подвижность; транзистор; тонкоплёночный; органический; полупроводник; влажность; mobility; transistor; thin film; organic; semiconductor; humidity. | |
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Скачать | Khodjakhon M.I., Nazarov B.I., Abdullaev S.F., Karieva R.A., Madvaliev U.M. | 67-73 | Dynamics change of chemical compounds in the composition of the dust aerosol on period of dust storms |
In this article the composition of the dust aerosol selected as a result of dust storms in the territory of the weather station Ayvadzh in 2007-2015 has been analyzed. High value compounds SiO (54.23%), CaO (11.25%) and AlO (10.16%), perhaps due to the anthropogenic emissions of neighboring states are observed. The statistical characteristics of detention compounds and correlation coefficients between certain compounds are calculated. A significant high correlation between SiO and NaO (r = 0.98), between FeO and SO (r = 0.89), between FeO and AlO as well as between KO and MgO (r = 0.89) are observed. |
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Ключевые слова: пылевой аэрозоль; пылевая буря; пылевая мгла; рентгенофлуоресцентный волнодисперсионный спектрометр S8 TIGER; dust aerosol; dust storm; dust haze; spectrometer XRF S8 TIGER. | |
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Скачать | Mirzoev D.Kh., Azamov Sh.O., Gaforzoda S.M., Bakhronov S.A., Otaev Sh.D., Mirsaidov U.M. | 74-78 | Phosphoric acid decomposition of mudstones of Chashma-Sang deposit of Tajikistan |
The results of studies of phosphoric acid decomposition of mudstones of Chashma-Sang Deposit are presented. The optimal conditions of extraction of valuable components from ore are defined. |
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Ключевые слова: аргиллиты; фосфорная кислота; оксид алюминия; оксид железа; mudstones; phosphoricacid; aluminumoxide; ironoxide. | |
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Скачать | Nizomov Z., Saidov R.H., Gulov B.N., Niyozov Ch.H. | 79-83 | The temperature dependence of the thermophysical properties of the alloy AК1М2 doped scandium and yttrium |
The article presents experimental results of the temperature of the patterns of thermophysical properties of alloy AКlМ2 doped scandium and yttrium. |
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Ключевые слова: сплав АК1М2; скандий; иттрий; теплоёмкость энтальпия; энтропия; энергия Гиббса; АК1М2 alloy; scandium; yttrium; thermal properties; temperature dependence. | |
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Скачать | Khamidov F.A., Mirsaidov I.U., Barotov B.B., Nazarov Kh.M., Mirsaidov U.M. | 84-89 | Physico-chemical and technological bases of uranium contained waste processing of Tajikistan |
The paper presents the results of producing of uranium concentrate from the uranium industry wastes. The kinetics of the process of waste decomposition at the optimal flow rate of HSO in the temperature range 293-353 K is studied. The experimental activation energy, the value of which is equal to 6.0 kJ/mole is determined. |
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Ключевые слова: отходы; разложение; уран; кинетика; энергия активации; wastes; decomposition; uranium; kinetics; activation energy. | |
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Скачать | Rahimov I.F., Gorshkova R.M., Muhidinov Z.K., Bobojonova G.N., Khalikova M.D., Sultanov A.U., Razikova G.V., Khalikov D.Kh. | 90-95 | Sorption activity of sunflower pectin polysaccharides in relation bilirubin () |
The results of the effect of the sunflowers pectin polysaccharides in laboratory animals with experimental induced liver injury by carbon tetrachloride are demonstrated. By the blood samples analysis of alanine aminotransferase and aspartataminotrasferaze activity, a level of total and indirect bilirubin, revealed a dose-dependent therapeutic effect of the studied soluble and insoluble pectin. |
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Ключевые слова: сорбенты; пектиновые полисахариды; корзинки подсолнечника; sorbent; pectin polysaccharides; sunflower head residue. | |
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Скачать | , | 96-97 | |
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Ключевые слова: . | |
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Скачать | , , | 98-102 | |
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Ключевые слова: . | |
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