Доклады Академии наук Республики Таджикистан, том 59, №11-12, 2016 г. |
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Download | Aminov A.S. | 453-456 | The zeros Davenport-Heilbronn's function in the critical line |
It is proved that at least zeros of the Davenport-Heilbronn function lie on the segment of the critical line. |
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Key words: функция Дэвенпорта-Хейльбронна; экспоненциальная пара; критическая прямая; Davenport-Heilbronn's function; exponential pair; critical line. | |
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Download | Malikov A.M. | 457-462 | Mean square polynomial approximation of functions on the real line and the value of the widths |
For some classes functions defined by the average values of generalized moduli of continuity of the m -th order, determined by differential operators of the second order to calculate the exact values of the various n -widths. |
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Key words: наилучшее приближение; дифференциальный оператор; обобщённый модуль непрерывности; n-поперечник; best approximation; differential operator; generalized modulus continuity; n-widths. | |
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Download | Khasanov Yu.Kh., Safarzoda E. | 463-470 | On approximation of Stepanovs almost periodic functions by means of Marcinkiewicz |
In this paper we study some questions of approximation of Stepanovs almost periodic functions of partial Fourier sums and means of Marcinkiewich, when the Fourier exponents of functions under consideration have a limit point in infinity. |
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Key words: ряды Фурье; почти-периодические функции Степанова; показатели Фурье; средние Марцинкевича; тригонометрический полином; наилучшее приближение; Fourier series; Stepanovs almost periodic functions; Fourier exponents; means of Marcinkievicz; trigonometric polynomial; best approximation. | |
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Download | Kokhirova G.I., Kryuchkov S.V., Nikolenko I.V., Bakanas E.S., Mullo-Abdolov A.Sh., Khamroev U.Kh. | 471-476 | Observations of the potentially hazardous asteroid 2016 LX48 in the International Astronomical Observatory Sanglokh |
Astrometric and photometric observations of the potentially hazardous asteroid 2016 LX48 were carried out in the International Astronomical Observatory Sanglokh (IAOS) of the Institute of Astrophysics of the Academy of Sciences of the Republic of Tajikistan. The asteroid’s coordinates were determined and the light curves in B, V, R and I filters were obtained. |
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Key words: астероид; координаты; астрометрия; фотометрия; кривая блеска; asteroid; coordinates; astrometry; photometry; light curve. | |
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Download | Ibadinov Kh.I., Asoev H.G. | 477-482 | The evolution of the photometric parameters of short period comet 8Р/Тuttle and solar activioty |
The evolution of the photometric parameters of the comet for about 220 years of observations was studied. The dependence of the absolute brightness of the comet by solar activity was found. Small fluctuations in the values of the elements of the comet's orbit does not significantly affect the photometric parameters of the comet. |
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Key words: комета; абсолютная яркость; фотометрический параметр n; эволюция; 8Р/Туттля; солнечная активность; comet; absolute brightness; the photometric parameter n; evolution; 8P/Тuttle; solar activity. | |
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Download | Muminov Kh.Kh., Shokirov F.Sh. | 483-488 | Numerical simulation of topological vortices in quasi two-dimensional systems |
The dynamics of interconnected vortex topological structures of Belavin-Polyakov type in the framework of (3+1)-dimensional O(3) nonlinear σ-model is studied. Numerical models of stationary and moving interconnected vortex pairs are obtained, and the conditions that lead to their oscillatory dynamics and to the gradual energy radiation in spatially separated two-dimensional layers are determined. |
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Key words: квазидвумерный топологический вихрь; связанное состояние вихрей; (3+1)-мерная нелинейная σ-модель; изоспиновая динамика; численное моделирование; quasi two-dimensional topological vortex; bound state of vortices; (3+1)-dimensional nonlinear σ-model; isospin dynamics; numerical simulation. | |
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Download | Nazarov B.I., Althausen D., Hofer J., Abdullaev S.F. | 489-497 | Remote sensing of environment in the framework of СADEX project |
Vertical profiles of atmospheric particles are determined by laser sounding within the German-Tajik joint project “Central Asian Dust Experiment” (CADEX) in Dushanbe. As an example, the measurements on August 9, 2015 are presented. The analysis indicates dust in the lower atmosphere. |
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Key words: лазер; лидар; пылевой аэрозоль; пылевая буря; пылевая мгла; lidar; laser; dust aerosol; dust storm; dust haze. | |
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Download | Soliev L. | 498-504 | Phase balance of system Na,K,Mg,Ca//SO,Cl-HO AT 50ºС in area crystallization of leonit (KSO∙MgSO∙4HO) |
By method of compilation of phase balance of system Na,K,Mg,Ca//SO,Cl-HO at 50ºС in area crystallization of leonit (KSO∙MgSO∙4HO) are investigated. Is established that as the equilibrium phase of the investigated system at 50С participates in formation 6 invariant of points, 19 monoalternative curves and 21 divariant of fields. On the basis of the received data a fragment of the diagram phase equilibrium investigated of system Na,K,Mg,Ca//SO,Cl-HO for the first time at 50С in area crystallization of leonit is constructed. |
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Key words: диаграмма; система; фаза; равновесие; леонит; нонвариантные точки; моновариантные кривые; дивариантные поля; diagram; system; phase; balance; leonit; invariant point; monoalternative curve; divariant of a field. | |
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Download | Shirinov M.Ch., Ganiev I.N., Olimov O.S., Karimov N.K. | 505-508 | Anode behaviour of alloy AC9, alloyed by calcium |
In this article results of research of anode behaviour of alloy AC9 alloyed from 0.01 to 1.0 weight % calcium in the environment of electrolit 3 %-s' NaCl are given. |
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Key words: сплав АК9; кальций; потенциостатический метод; коррозия; анодное поведение; питтингообразование; среда NaCl; alloy АC9; calcium; potentsio-static a method; corrosion; anode behavior; pittingo-formation; NaCl environment. | |
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Download | Berdiev A.E., Ganiev I.N., Badurdinov S.T., Abulkhaev V.D. | 509-513 | Influence neodymium oxidation kinetics AK12 alloy in the solid state |
By thermogravimetric method the interaction of AK12 alloy doped with neodymium, with oxygen in the temperature range 723 K, 773 K and 823 K in the solid state is studied. The kinetic parameters of the process of oxidation are determined. It is shown that increasing the content of alloying elements the activation energy of oxidation is increased 139.8-192.8 kJ / mol. |
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Key words: сплав АК12; неодим; термогравиметрический метод; кинетика окисления; истинная скорость окисления; энергия активации; alloy АК12; neodymium; termogravimetrichesky method; oxidation kinetics; the true rate of oxidation activation energy. | |
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Download | Badalova M.A., Abdusalyamova M.N., Rustamov S.T., Badalov A. | 514-519 | Intermetalide themrochemical characteristics of LnSb (Ln - lanthanides) composition |
Melting temperature (Т) and enthalpy formation (∆Н) and intermetalide melting (∆Н) of LnSb(Ln - lanthanides) composition by calculated and semiempirical methods and/or specified are determined. Change regularity equations of indicated characteristics are compiled by mathematic modeling depending on lanthanides’ nature. Components impact on general properties of intermetallides is determined. |
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Key words: температура плавления; энтальпии образования и плавления; интерметаллиды сурьмы; лантаноиды; закономерность; melting temperature; enthalpy formation and melting; intermetallides antimony; lanthanides; regularity. | |
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Download | Nozimova M.I., Ulukhanov Al.A., Ulukhanov Az.A., Sharifov A., Akramov A.A. | 520-523 | Effect of pH on the kinetics of extractables composition leaves and sawdust chinar |
In the paper the study of the kinetics of excretion of extractives of leaves and sawdust plane tree at different values of pH are presents. The raw materials used in the mass of sycamore leaf and sawdust, as well extractables HO and 0.1N KOH and HSO. The degree of release of extractables from the sycamore leaves and sawdust was 50%. |
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Key words: чинар; опилки; листья; экстрагируемые вещества; нейтральная; щелочная и кислая среда; кинетика; Platanus; sawdust; leaves; extractives; neutral; alkaline and acidic environment; kinetics. | |
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Download | Ahmedov S.M., Rahimi F.K., Ahmedov S.Sh., Muminov Kh.Kh., Odinaev F.R., Rashidov J., Safarov B.J., Tabarov Z.V., Safarov J.B., Saidmurodov A.S. | 524-533 | Application of cryogenic temperatures in liver surgery |
In the paper the direct results of the development and clinical application of cryogenic equipment with anti-adhesion coating developed by a group of scientists from the Institute of Gastroenterology of the Health Care Ministry, S.U.Umarov Physical-Technical Institute of the Academy of Sciences and Tajik National University are presents. The results of cryosurgery of hepatic focal lesions of 30 patients show a high efficiency of the method: a significant decrease in the volume of intraoperative blood loss, increased radicalism of the operation and maintenance of reliable ablation. |
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Key words: криохирургия; криоинструмент; антиадгезионное покрытие; очаговые заболевания печени; cryosurgery; cryoinstruments; release coating; focal liver disease. | |
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