12 results on '"Special functions"'
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2. КОНЦЕПТУАЛЬНА МОДЕЛЬ ВИКОРИСТАННЯ МКФ-ДП В ІНКЛЮЗИВНОМУ НАВЧАЛЬНОМУ ПРОЦЕСІ
- Author
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Данілавічютє, Еляна
- Subjects
SCHOOL environment ,CONCEPTUAL models ,ALGORITHMS ,SPECIAL functions ,CHILDREN'S health - Abstract
Copyright of Exceptional Child: Teaching & Upbringing is the property of National Academy of Pedagogical Sciences of Ukraine and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2018
3. Approximate Solution of Mixed Problem for Telegrapher Equation with Homogeneous Boundary Conditions of First Kind Using Special Functions
- Author
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I. N. Meleshko and P. G. Lasy
- Subjects
Power series ,boundary condition of the first kind ,Polylogarithm ,020209 energy ,Energy Engineering and Power Technology ,02 engineering and technology ,special function ,01 natural sciences ,010305 fluids & plasmas ,mixed problem ,0103 physical sciences ,0202 electrical engineering, electronic engineering, information engineering ,Trigonometric functions ,Elementary function ,Applied mathematics ,Mathematics ,Series (mathematics) ,Renewable Energy, Sustainability and the Environment ,telegrapher’s equation ,klein – gordon equation ,Hydraulic engineering ,Engineering (General). Civil engineering (General) ,Periodic function ,Unit circle ,Nuclear Energy and Engineering ,Special functions ,TA1-2040 ,TC1-978 ,approximate solution - Abstract
The mixed problem for the telegraph equation well-known in electrical engineering and electronics, provided that the line is free from distortions, is reduced to a similar problem for one-dimensional inhomogeneous wave equation. An effective way to solve this problem is based on the use of special functions – polylogarithms, which are complex power series with power coefficients, converging in the unit circle. The exact solution of the problem is expressed in integral form in terms of the imaginary part of the first-order polylogarithm on the unit circle, and the approximate one – in the form of a finite sum in terms of the real part of the dilogarithm and the imaginary part of the third-order polylogarithm. All the indicated parts of the polylogarithms are periodic functions that have polynomial expressions of the corresponding degrees on an interval of length in the period, which makes it possible to obtain a solution to the problem in elementary functions. In the paper, we study a mixed problem for the telegrapher’s equation which is well-known in applications. This problem of linear substitution of the desired function witha time-exponential coefficient is reduced to a similar problem for the Klein – Gordon equation. The solution of the latter can be found by dividing the variables in the form of a series of trigonometric functions of a line point with time-dependent coefficients. Such a solution is of little use for practical application, since it requires the calculation of a large number of coefficients-integrals and it is difficult to estimate the error of calculations. In the present paper, we propose another way to solve this problem, based on the use of special He-functions, which are complex power series of a certain type that converge in the unit circle. The exact solution of the problem is presented in integral form in terms of second-order He-functions on the unit circle. The approximate solution is expressed in the final form in terms of third-order He-functions. The paper also proposes a simple and effective estimate of the error of the approximate solution of the problem. It is linear in relation to the line splitting step with a time-exponential coefficient. An example of solving the problem for the Klein – Gordon equation in the way that has been developed is given, and the graphs of exact and approximate solutions are constructed.
- Published
- 2021
4. INTERACTION OF HARMONIC WAVES WITH CYLINDRICAL STRUCTURES
- Author
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Jurayev, Uktam Shavkatovich and Akhmedov, Jamoldin Djhalolovich
- Subjects
displacement ,special functions ,harmonic waves ,underground tunnels ,cylindrical shell ,wave scattering ,viscoelasticity - Abstract
The paper considers the impact of harmonic waves on a cylindrical shell located in a viscoelastic half-plane. The main purpose of the study is to determine the stress-strain state of a cylindrical shell when exposed to harmonic waves. The basic equation of viscoelasticity in displacements with the corresponding boundary conditions is obtained. The solution is expressed in terms of special Bessel and Hankel functions. В работе рассматривается влияние гармонических волн на цилиндрическую оболочку, находящейся на вязкоупругой полуплоскости. Основной целью исследования является определение напряженно-деформированного состояния цилиндрической оболочки при воздействии гармонических волн. Получено основное уравнение вязко упругости в перемещениях с соответствующими граничными условиями. Решение выражается через специальные функции Бесселя и Ханкеля. Ушбу мақолада қовушқоқ - эластик ярим текисликда жойлашган цилиндрик иншоотларга гармоник тўлқинларнинг таъсири ўрганилган. Тадқиқотнинг асосий мақсади гармоник тўлқинлар таъсирида цилиндрик қобиқнинг кучланганлик-деформацияланганлик ҳолатини аниқлашдан иборат. Қовушқоқ - эластик муҳитнинг кўчишлар билан ифодаланган асосий тенгламаси мос чегаравий шартлар ёрдамида олинган. Ечим махсус Бессел ва Ханкел функциялари билан ифодаланган., {"references":["Список использованной литературы: 1.\tРашидов, Т.Р., Кузицов, С.В., Мардонов, Б.М., Мирзаев, И. Прикладные задачи сесмодинамики сооружений. Книга 1. Действые сейсмических волн на подземных трубопровод и фундаменты сооружений, взаимодействующих с грунтовой средой. –Ташкент: «Навруз». – 2019. – 268 с. 2.\tДенисов, Г.В., Лалин, В.В. Собственные колебания заглубленных магистральных трубопроводов при сейсмическом воздействии // Трубопроводный транспорт: теория и практика. 2013. № 4(38). С. 14–17. 3.\tTeshaev, M.K., Safarov, I.I., Kuldashov, N.U., Ishmamatov, M.R., Ruziev, T.R. On the Distribution of Free Waves on the Surface of a Viscoelastic Cylindrical Cavity// Journal of Vibrational Engineering and Technologies, 2020, 8(4), стр. 579–585. 4.\tЖураев, У. Ш. (2010). Численное решение плоской задачи Лемба. Пробл. мех,(4), 5-8. 5.\tSagdiyev, K., Boltayev, Z., Ruziyev, T., Jurayev, U., & Jalolov, F. (2021). Dynamic Stress-Deformed States of a Circular Tunnel of Small Position Under Harmonic Disturbances. In E3S Web of Conferences (Vol. 264). EDP Sciences. 6.\tSafarov, I. I., Kulmuratov, N. R., Nuriddinov, B. Z., & Esanov, N. (2020). On the action of mobile loads on an uninterrupted cylindrical tunnel. Theoretical & Applied Science, (4), 328-335. 7.\tЖўраев, Ў. Ш., & Турсунов, Қ. Қ. (2020). Фарғона вилояти тарихий шаҳарларидаги турар-жой биноларида ганч ва ёғоч ўймакорлигининг шакилланиши ва ривожланиши. Science and Education, 1(3), 264-267. 8.\tSafarov, I. I., Kulmuratov, N. R., Nuriddinov, B. Z., & Esanov, N. (2020). Mathematical modeling of vibration processes in wave-lasted elastic cylindrical bodies. ISJ Theoretical & Applied Science, 04 (84), 321-327. 9.\tЭсанов, Н.К. (2020). Свободные колебания трубопроводов как тонкие цилиндрические оболочки от внутреннего давления. Научные доклады Бухарского государственного университета , 3 (1), 46-52. 10.\tEsanov, N. K. (2020). Free oscillations of pipelines like thin cylindrical shells with regards to internal pressure. Scientific reports of Bukhara State University, 3(1), 46-52. 11.\tИбрагимович С.И., Нарпулатович А.С., Гурбанович Е.Н. Динамический расчет трубопроводов на мелководье на основе теории тонкого тонкого слоя. Международный журнал инноваций в инженерных исследованиях и технологиях , 7 (07), 75-79. 12.\tЭсанов, Н. К., Сафаров, И. И., & Алмуратов, Ш. Н. (2021). Об исследования спектров собственных колебаний тонкостенкий пластин в магнитных полях. Central asian journal of theoretical & applied sciences, 2(5), 124-132. 13.\tRustam, А., & Nasimbek, M. (2021). А New Method Of Soil Compaction By The Method Of Soil Loosening Wave. The American Journal of Engineering and Technology, 3(02), 6-16. 14.\tZikirov, M. (2012). Development of Small business in transition economies of Tajikistan. Bulletin of Tajik National University of Republic of Tajikistan, 2/5 (92), 48-51. 15.\tАхунбаев, Р., Махмудов, Н., & Хожиматова, Г. (2021). Новый способ уплотнение грунта методом волна разрыхления грунта. Scientific progress, 1(4). 16.\tSalimov, A. M., Qosimova, S. F., & Tursunov, Q. Q. (2021). Features of the use of pilgrims for tourism in the Fergana region. Scientific-technical journal, 3(4), 42-47. 17.\tTursunova, D. (2021, August). Architectural history of Margilan city: https://doi. org/10.47100/conferences. v1i1. 1231. In Research Support Center Conferences (No. 18.05). 18.\tЮнусалиев, Э. М., Абдуллаев, И. Н., Ахмедов, Ж. Д., & Рахманов, Б. К. (2020). Инновации в строительной технологии: производство и применение в узбекистане строп из текстильных лент и комбинированных канатов. In Энерго-ресурсосберегающие технологии и оборудование в дорожной и строительной отраслях (pp. 421-431). 19.\tNurmatov, D. O., Botirova, A. R., & Omonova, Z. (2021). Landscape solutions around the roads. 20.\tAxmedov, J. (2021). The preservation of ancient architectural monuments and improvement of historical sites-factor of our progress. Збірник наукових праць ΛΌГOΣ."]}
- Published
- 2022
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5. Two special functions, generalizing the Mittag–Leffler type function, in solutions of integral and differential equations with Riemann–Liouville and kober operators
- Author
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Eugeniy N Ogorodnikov
- Subjects
special functions ,mittag–leffler type function ,fractional calculus ,riemann–liouville integral and differential operators ,fractional differential and integral equations ,cauchy type problems ,Mathematics ,QA1-939 - Abstract
Two special functions, concerning Mittag–Leffler type functions, are considered. The first is the modification of generalized Mittag–Leffler type function, introduced by A. A. Kilbas and M. Saigo; the second is the special case of the first one. The solutions of the integral equation with the Kober operator and the generalized power series as the free term are presented. The existence and uniqueness of these solutions are proved. The explicit solutions of the integral equations above are found out in terms of introduced special functions. The correctness of initial value problems for linear homogeneous differential equations with Riemann–Liouville and Kober fractional derivatives is investigated. The solutions of the Cauchy type problems are found out in the special classes of functions with summable fractional derivative via the reduction to the considered above integral equation and also are written in the explicit form in terms of the introduced special functions. The replacement of the Cauchy type initial values to the modified (weight) Cauchy conditions is substantiated. The particular cases of parameters in the differential equations when the Cauchy type problems are not well-posed in sense of the uniqueness of solutions are considered. In these cases the unique solutions of the Cauchy weight problems are existed. It is noted in this paper that the weight Cauchy problems allow to expand the acceptable region of the parameters values in the differential equations to the case when the fractional derivative has the nonsummable singularity in zero.
- Published
- 2012
6. On two special functions, generalizing the Mittag-Leffler type function, their properties and applications
- Author
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Eugeniy N Ogorodnikov
- Subjects
special functions ,mittag-leffler type function ,riemann-liouville integral and differential operators ,fractional differential and integral equations ,cauchy type problems ,Mathematics ,QA1-939 - Abstract
Two special functions, concerning Mittag-Leffler type functions, are studied. The first is the modification of generalized Mittag-Leffler function, which was introduced by A. Kilbas and M. Saigo; the second is the special case of the first one. The relation of these functions with some elementary and special functions and their role in solving of Abel-Volterra integral equations is indicated. The formulas of the fractional integration and differentiation in sense of Riemann-Liouville and Kober are presented. The applications to Cauchy type problems for some linear fractional differential equations with Riemann-Liouville and Kober derivatives are noticed.
- Published
- 2012
7. Integral representations and asymptotic expansion formulas of Mittag-Leffler-type function of two variables
- Author
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Nikolay S Yashagin
- Subjects
special functions ,generalizations mittag-leffler-type function for two variables ,integral representations ,asymptotic expansion formulas ,Mathematics ,QA1-939 - Abstract
Special function generalizing Mittag-Leffler-type function for two variables is considered. Integral representations for this function in different variation range of arguments for a certain value of parameters is obtained. Asymptotic formulas and asymptotic properties of this function for large arguments is established. Theorems for these formulas and these properties are provided.
- Published
- 2010
8. On a measure of algebraic independence of modulus and values of Jacobi elliptic function.
- Author
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Kholyavka, Ya. M.
- Subjects
ALGEBRAIC independence ,ABSTRACT algebra ,ELLIPTIC functions ,TRANSCENDENTAL functions ,SPECIAL functions - Abstract
It is proved an estimation of a measure of algebraic independence for the modulus and values at various algebraic points of the Jacobi elliptic function. [ABSTRACT FROM AUTHOR]
- Published
- 2013
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9. MULTIVARIATE DISTRIBUTIONS MODELING IN RISK ESTIMATION USING COPULAS.
- Author
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Bidyuk, P. I. and Kroptya, A. V.
- Subjects
MULTIVARIATE analysis ,COPULA functions ,DISTRIBUTION (Probability theory) ,SPECIAL functions ,MATHEMATICAL analysis ,PARAMETER estimation ,MAXIMUM likelihood statistics - Abstract
The paper is devoted to analysis of the methods of constructing a special class of functions — copulas, that are used for the description of multivariate distributions. Some special features of copula parameter estimation procedures are considered, with the maximum likelihood method in particular. A possibility of copula application to statistical analysis of risks is studied, that are represented by extreme values of distributions. Some examples of multivariate risk distributions description are presented. [ABSTRACT FROM AUTHOR]
- Published
- 2007
10. Функции государства: системный подход
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политическая функция ,the functions of the state ,функции государства ,special functions ,экономическая функция ,единичные функции ,social function ,single function ,социальная функция ,political function ,общая функция ,economic function ,особенные функции - Abstract
Статья посвящена изучению системы функций государства. В ней рассматривается два уровня системы – горизонтальный и вертикальный. Первый представлен в классификации функций государства, выделяемых по различным основаниям. Второй – в виде иерархического построения: общих, особенных, единичных функций., The article is devoted to studying of the system of functions of the state. It considers the concept two levels horizontal and vertical – the first one is represented in a classification functions of the state allocated to on different grounds. The second one is represented in the form hierarchical: total, special, unit functions., №2(51) (2017)
- Published
- 2017
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11. О мероморфных решениях двумерных разностных уравнений
- Author
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Trishin, Pavel V.
- Subjects
special functions ,гипергеометрические функции ,специальные функции ,difference equations ,разностные уравнения ,hypergeometric functions - Abstract
Изучается структура мероморфных решений двумерного разностного уравнения с постоянными коэффициентами, строятся интегральные представления мероморфных решений., We study the structure of meromorphic solutions to difference equations by means of integral repre- sentations.
- Published
- 2009
12. Asymptotic expansion of lusternik's functions
- Author
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Kochnev, A. V.
- Subjects
УДК 519.2 ,special functions ,асимптотические разложения ,Fourier transformation ,asymptotic decomposition ,УДК 517.912 ,специальные функции ,преобразование Фурье - Abstract
Рассмотрена связь функций Люстерника и специального случайного процесса на локально-компактной группе. Получена предельная теорема для этого процесса. Получен главный член асимптотического разложения функций Люстерника. The relation between Lusteraik's functions and special kind of random walk on local-compact group was considering in article. Limit theorem for this random walk was proofed. Basic term of asymptotic decomposition of Lusteraik's functions was found. Kochnev Anton Valentinovich - Graduate Student, Mathematical Analysis Department, South Ural State University. Кочнев Антон Валентинович - аспирант, кафедра математического анализа, Южно- Уральский государственный университет. e-mail: antoshka_85@list.ru
- Published
- 2009
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