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Wyświetlanie 1-15 z 1632
Tytuł:
Personal features and self-assessment of stuttering adolescents as a factor of the success of their psychological – pedagogical support
Autorzy:
A, Zaytseva, Lyudmila
A, Sys, Lyudmila
Powiązania:
https://bibliotekanauki.pl/articles/903752.pdf
Data publikacji:
2019-12-13
Wydawca:
Akademia Pedagogiki Specjalnej im. Marii Grzegorzewskiej. Wydawnictwo APS
Tematy:
stuttering
features of self-assessment
communicative behavior
problem situations
social adaptation
Opis:
The article presents the results of a study on individual psychological traits of the personality of stuttering adolescents in problematic speech situations, the participants' characteristics are given, and self-assessment of stutterers is considered as a factor contributing to the improvement of correctional and pedagogical interventions and successful social adaptation of adolescents.
Źródło:
Szkoła Specjalna; 2019, LXXX(5); 352-362
0137-818X
Pojawia się w:
Szkoła Specjalna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Some new existence results and stability concepts for fractional partial random differential equations
Autorzy:
Abbas, S.
Benchohra, M.
Darwish, M. A.
Powiązania:
https://bibliotekanauki.pl/articles/357770.pdf
Data publikacji:
2016
Wydawca:
Politechnika Rzeszowska im. Ignacego Łukasiewicza. Oficyna Wydawnicza
Tematy:
random differential equations
left-sided mixed Riemann-Liouville integral
Caputo fractional-order derivative
Banach space
Darboux problem
Ulam stability
równanie różniczkowe
pochodna Caputo
przestrzeń Banacha
problem Darbouxa
Opis:
In the present paper we provide some existence results and Ulam’s type stability concepts for the Darboux problem of partial fractional random differential equations in Banach spaces, by applying the measure of noncompactness and a random fixed point theorem with stochastic domain.
Źródło:
Journal of Mathematics and Applications; 2016, 39; 5-22
1733-6775
2300-9926
Pojawia się w:
Journal of Mathematics and Applications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Periodic orbits around the triangular points with prolate primaries
Autorzy:
Abd El Motelp, Nihad
Radwan, Mohamed
Powiązania:
https://bibliotekanauki.pl/articles/2204240.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Centrum Badań Kosmicznych PAN
Tematy:
restricted three-body problem
triangular points
prolate triaxial
periodic orbits
Opis:
Periodic orbits play a fundamental role in the study and deep understanding of the behavior of dynamical systems. In the current work, we investigated the periodic orbits around the triangular libration points of the restricted three-body problem. The equations of motion of the restricted problem are presented when both primaries are prolate triaxial. Periodic orbits around the triangular points are obtained and then illustrated graphically for some selected initial conditions and for the entire domain of the mass ratio µ, as well. The eccentricities of the periodic orbits are obtained and then represented graphically. It is observed that the periodic orbits about the triangular stationary points are elliptical, and the frequencies of short and long orbits of the periodic motion are influenced by the shape of the primary bodies. Furthermore, we found that the perturbing forces influence the period, the orientation, and the eccentricities of the short and long periodic orbits.
Źródło:
Artificial Satellites. Journal of Planetary Geodesy; 2023, 58, 1; 1--13
2083-6104
Pojawia się w:
Artificial Satellites. Journal of Planetary Geodesy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Topological sensitivity analysis for a coupled nonlinear problem with an obstacle
Autorzy:
Abdelbari, M.
Nachi, K.
Sokolowski, J.
Powiązania:
https://bibliotekanauki.pl/articles/205653.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
topological derivative
shape optimization
SteklovPoincaroperator
Signorini problem
variational inequality
Helmholtz equation
coupled partial differential equations
conical differential
asymptotic expansions
singular perturbations of geometrical Romains
truncated domain
Opis:
The Topological Derivative has been recognized as a powerful tool in obtaining the optimal topology for several kinds of engineering problems. This derivative provides the sensitivity of the cost functional for a boundary value problem for nucleation of a small hole or a small inclusion at a given point of the domain of integration. In this paper, we present a topological asymptotic analysis with respect to the size of singular domain perturbation for a coupled nonlinear PDEs system with an obstacle on the boundary. The domain decomposition method, referring to the SteklovPoincar´epseudo-differential operator, is employed for the asymptotic study of boundary value problem with respect to the size of singular domain perturbation. The method is based on the observation that the known expansion of the energy functional in the ring coincides with the expansion of the Steklov-Poincar´e operator on the boundary of the truncated domain with respekt to the small parameter, which measures the size of perturbation. In this way, the singular perturbation of the domain is reduced to the regular perturbation of the Steklov-Poincar´e map ping for the ring. The topological derivative for a tracking type shape functional is evaluated so as to obtain the useful formula for application in the numerical methods of shape and topology optimization.
Źródło:
Control and Cybernetics; 2017, 46, 1; 5-25
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Shape sensitivity of optimal control for the Stokes problem
Autorzy:
Abdelbari, Merwan
Nachi, Khadra
Sokolowski, Jan
Szulc, Katarzyna
Powiązania:
https://bibliotekanauki.pl/articles/2049935.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
Stokes equations
optimal control problem
coupled partial differential equations
shape optimization
shape gradient
Opis:
In this article, we study the shape sensitivity of optimal control for the steady Stokes problem. The main goal is to obtain a robust representation for the derivatives of optimal solution with respect to smooth deformation of the flow domain. We introduce in this paper a rigorous proof of existence of the material derivative in the sense of Piola, as well as the shape derivative for the solution of the optimality system. We apply these results to derive the formulae for the shape gradient of the cost functional; under some regularity conditions the shape gradient is given according to the structure theorem by a function supported on the moving boundary, then the numerical methods for shape optimization can be applied in order to solve the associated optimization problems.
Źródło:
Control and Cybernetics; 2020, 49, 1; 11-40
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Nonlinear convergence algorithm: structural properties with doubly stochastic quadratic operators for multi-agent systems
Autorzy:
Abdulghafor, R.
Turaev, S.
Zeki, A.
Abubaker, A.
Powiązania:
https://bibliotekanauki.pl/articles/91876.pdf
Data publikacji:
2018
Wydawca:
Społeczna Akademia Nauk w Łodzi. Polskie Towarzystwo Sieci Neuronowych
Tematy:
doubly stochastic quadratic operators
nonlinear convergence algorithm
consensus problem
multi-agent systems
kwadratowe operatory podwójnie stochastyczne
problem konsensusu
systemy wieloagentowe
Opis:
This paper proposes nonlinear operator of extreme doubly stochastic quadratic operator (EDSQO) for convergence algorithm aimed at solving consensus problem (CP) of discrete-time for multi-agent systems (MAS) on n-dimensional simplex. The first part undertakes systematic review of consensus problems. Convergence was generated via extreme doubly stochastic quadratic operators (EDSQOs) in the other part. However, this work was able to formulate convergence algorithms from doubly stochastic matrices, majorization theory, graph theory and stochastic analysis. We develop two algorithms: 1) the nonlinear algorithm of extreme doubly stochastic quadratic operator (NLAEDSQO) to generate all the convergent EDSQOs and 2) the nonlinear convergence algorithm (NLCA) of EDSQOs to investigate the optimal consensus for MAS. Experimental evaluation on convergent of EDSQOs yielded an optimal consensus for MAS. Comparative analysis with the convergence of EDSQOs and DeGroot model were carried out. The comparison was based on the complexity of operators, number of iterations to converge and the time required for convergences. This research proposed algorithm on convergence which is faster than the DeGroot linear model.
Źródło:
Journal of Artificial Intelligence and Soft Computing Research; 2018, 8, 1; 49-61
2083-2567
2449-6499
Pojawia się w:
Journal of Artificial Intelligence and Soft Computing Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On the numerical approximation of first-order Hamilton-Jacobi equations
Autorzy:
Abgrall, R.
Perrier, V.
Powiązania:
https://bibliotekanauki.pl/articles/929712.pdf
Data publikacji:
2007
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
równanie Hamiltona-Jacobiego
aproksymacja
zagadnienie Cauchy'ego-Dirichleta
siatka trójkątna
approximation of Hamilton-Jacobi equations
viscous solution
Cauchy-Dirichlet problem
triangular mesh
Opis:
Some methods for the numerical approximation of time-dependent and steady first-order Hamilton-Jacobi equations are reviewed. Most of the discussion focuses on conformal triangular-type meshes, but we show how to extend this to the most general meshes. We review some first-order monotone schemes and also high-order ones specially dedicated to steady problems.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2007, 17, 3; 403-412
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Using the complexity index method to manage problems related to manufacturing
Autorzy:
Abou-Chakra, Hadi
Powiązania:
https://bibliotekanauki.pl/articles/2014147.pdf
Data publikacji:
2021
Wydawca:
Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:
complexity Index
perceived complexity
complexity drivers
manufacturing problem
indeks słożoności
przestrzeganie złożoności
czynnik złożoności
problemy produkcji
Opis:
The Complexity Index method is an approach developed to help manufacturing companies quantify complexity in production. This paper sheds light on the connection between complexity and manufacturing problems and how the Complexity Index method was used to capture the areas in a production line with high levels of complexity to determine the sources of manufacturing problems related to labour time, surplus production, and manufacturing error. The main areas perceived as complex were due to Work Instructions, Work Content, and Product Variants. The perceived complexities were assessed for proper actions to be taken to decrease their level of complexity. The correlations between complexity and manufacturing problems were used for tracking related issues and ways for improvement. This study presents data on the use of workers’ perception to uncover the areas of complexity, which could be used by the management team to pragmatically capture difficulties and issues related to manufacturing problems to improve the production system.
Źródło:
Engineering Management in Production and Services; 2021, 13, 2; 46-53
2543-6597
2543-912X
Pojawia się w:
Engineering Management in Production and Services
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Approximation of a Solidification Problem
Autorzy:
Aboulaich, R.
Haggouch, I.
Souissi, A.
Powiązania:
https://bibliotekanauki.pl/articles/908072.pdf
Data publikacji:
2001
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
optymalizacja
metoda elementów skończonych
Stefan problem
free boundary
shape optimization
Euler method
finite element method
Opis:
A two-dimensional Stefan problem is usually introduced as a model of solidification, melting or sublimation phenomena. The two-phase Stefan problem has been studied as a direct problem, where the free boundary separating the two regions is eliminated using a variational inequality (Baiocci, 1977; Baiocchi et al., 1973; Rodrigues, 1980; Saguez, 1980; Srunk and Friedman, 1994), the enthalpy function (Ciavaldini, 1972; Lions, 1969; Nochetto et al.., 1991; Saguez, 1980), or a control problem (El Bagdouri, 1987; Peneau, 1995; Saguez, 1980). In the present work, we provide a new formulation leading to a shape optimization problem. For a semidiscretization in time, we consider an Euler scheme. Under some restrictions related to stability conditions, we prove an L^2-rate of convergence of order 1 for the temperature. In the last part, we study the existence of an optimal shape, compute the shape gradient, and suggest a numerical algorithm to approximate the free boundary. The numerical results obtained show that this method is more efficient compared with the others.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2001, 11, 4; 921-955
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A rule based machine learning approach to the nonlinear multifingered robot gripper problem
Autorzy:
Abu-Zitar, R.
Al-Fahed Nuseirat, A. M.
Powiązania:
https://bibliotekanauki.pl/articles/970099.pdf
Data publikacji:
2005
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
zacisk robota
programowanie ewolucyjne
komputerowe uczenie się
robot gripper
nonlinear complementarity problem (NCP)
Evolutionary Programming (EP)
machine learning
nearest-classifier-algorithm
Opis:
In this paper, we present a novel method that utilizes the accumulation of knowledge in a rule base for solving the nonlinear frictional gripper problem for both the isotropic and orthotropic cases. The knowledge is discovered and accumulated in a rule base with the aid of a genetic based machine learning mechanism. This machine learning mechanism extracts rules for solving the problem with the help of the Evolutionary Programming [EP) algorithm. The retrievals are done using the nearest-classifier-algorithm. This approach provides online solutions for the problem, and establishes a dynamic and evolving environment that adapts with new and sudden changes on the grip specifications or on the external forces. The resulting grasping forces using the presented method are compared with grasping forces obtained using other methods, such as the Complementarity Problems. The proposed online method could update the needed grasping forces to keep firm grip if the configuration of the forces externally applied to the object is changed. Numerical examples that illustrate the proposed method are presented.
Źródło:
Control and Cybernetics; 2005, 34, 2; 553-573
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Some examples of solutions to an inverse problem for the first-passage place of a jump-diffusion process
Autorzy:
Abundo, Mario
Powiązania:
https://bibliotekanauki.pl/articles/2183487.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
jump-diffusion process
first-passage place
inverse first-passage place problem
Opis:
We report some additional examples of explicit solu- tions to an inverse first-passage place problem for one-dimensional diffusions with jumps, introduced in a previous paper. If X(t) is a one-dimensional diffusion with jumps, starting from a random position η 2 [a, b], let be τa,b the time at which X(t) first exits the interval (a, b), and πa = P(X(τa,b) ≤ a) the probability of exit from the left of (a, b). Given a probability q 2 (0, 1), the problem consists in finding the density g of η (if it exists) such that πa = q; it can be seen as a problem of optimization.
Źródło:
Control and Cybernetics; 2022, 51, 1; 31--42
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
John C. Poirier – Jeffrey Peterson (eds.), Marcan Priority without Q: Explorations in the Farrer Hypothesis (Library of New Testament Studies 455; London: Bloomsbury – New York: T&T Clark, 2015). Pp. XIV + 272. $110,00. ISBN 978-0-56715-913-7
Autorzy:
Adamczewski, Bartosz
Powiązania:
https://bibliotekanauki.pl/articles/1053642.pdf
Data publikacji:
2016-04-25
Wydawca:
Katolicki Uniwersytet Lubelski Jana Pawła II
Tematy:
Nowy Tetament
Ewangelia św. Mateusza
Ewangelia św. Łukasza
problem synoptyczny
Opis:
Book Review: John C. Poirier - Jeffrey Peterson (ed.), Marcan Priority without Q: Explorations in the Farrer Hypothesis (Library of New Testament Studies 455; London - New York: Bloomsbury - T&T Clark 2015). Pp. XIV + 272. $110,00. ISBN 978-0-56715 -913-7.
Źródło:
The Biblical Annals; 2016, 6, 2; 311-315
2083-2222
2451-2168
Pojawia się w:
The Biblical Annals
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Robert K. MacEwen, Matthean Posteriority: An Exploration of Matthew’s Use of Mark and Luke as a Solution to the Synoptic Problem (Library of New Testament Studies 501; London – New York: Bloomsbury – T&T Clark, 2015). Pp. XXIII + 309. £65,00. ISBN 978-0-56736-434-0
Autorzy:
Adamczewski, Bartosz
Powiązania:
https://bibliotekanauki.pl/articles/1178709.pdf
Data publikacji:
2016-07-01
Wydawca:
Katolicki Uniwersytet Lubelski Jana Pawła II
Tematy:
Nowy Tetament
Ewangelia św. Mateusza
Ewangelia św. Łukasza
problem synoptyczny
Opis:
Book review: Robert K. MacEwen, Matthean Posteriority: An Exploration of Matthew’s Use of Mark and Luke as a Solution to the Synoptic Problem (Library of New Testament Studies 501; London - New York: Bloomsbury T&T Clark 2015). Pp. XXIII + 309. £65,00. ISBN 978-0-5673
Źródło:
The Biblical Annals; 2016, 6, 3; 513-517
2083-2222
2451-2168
Pojawia się w:
The Biblical Annals
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Clash Between China and the United States and Security in the Asia-Pacific Region - A Security Dilemma, a Balance of Power, and the Bandwagon Effect
Столкновение между Китаем и Соединенными Штатами и безопасность в Азиатско-Тихоокеанском регионе – дилемма безопасности, баланс сил и эффект «бандвагона»
Autorzy:
Adamczyk, Marcin
Rutkowska, Patrycja
Powiązania:
https://bibliotekanauki.pl/articles/1934158.pdf
Data publikacji:
2021-06-30
Wydawca:
Wydawnictwo Adam Marszałek
Tematy:
Asia-Pacific region
security problem
balance of power
joining a stronger one
Азиатско-Тихоокеанский регион
дилемма безопасности
равновесие сил
связь с более сильными
Opis:
This article attempts to answer the question about the security situation in the Asia-Pacific region. The authors decided to verify the authenticity of the thesis that Asia witnessed the birth of a new security dilemma based on the data on the amount of defense spending among the key countries of the region (China, the United States, Japan, Russia, Pakistan, Australia, and India). The second thesis that the authors want to confirm or reject is that there is a coalition in the Asia-Pacific area that is creating a balance of power and, at the same time, a growing number of countries that want to join the PRC. To this end, the authors have used a content analysis method and a comparative method. The first chapter is a brief description of the article’s theoretical framework in the form of a realistic current in international relations and security research and an explanation of the concepts of power balance, security dilemma, and bandwagoning applied. The second chapter presents data on the defense spending of the most important actors in the region. In the third chapter, which is a substitute for a conclusion, the authors will analyze the situation in the Asia-Pacific region using the previously presented theoretical approach and empirical data.
Данная статья представляет собой попытку ответить на вопрос о ситуации в области безопасности в Азиатско-Тихоокеанском регионе. Авторы решили проверить правдивость тезиса о том, что в Азии возникла новая дилемма безопасности, основанная на данных о расходах на оборону среди ключевых стран региона (Китай, США, Япония, Россия, Пакистан, Австралия и Индия). Второй тезис, который авторы хотят подтвердить или опровергнуть, заключается в том, что в Азиатско-Тихоокеанском регионе существует коалиция, которая формирует коалицию, нацеленную на балансирование сил, и в то же время растет число стран, желающих присоединиться к КНР. Для этого авторы использовали метод контент-анализа и сравнительный метод. Первая глава представляет собой краткое описание теоретических основ статьи в виде реалистичного течения в международных отношениях и исследованиях в области безопасности, а также объяснение прикладных концепций баланса сил, дилеммы безопасности и переплетения. Во второй главе представлены данные о расходах на оборону наиболее важных субъектов в регионе. В третьей главе, которая заменяет собой окончание, авторы проанализируют ситуацию в Азиатско-Тихоокеанском регионе, используя ранее представленный теоретический подход и эмпирические данные.
Źródło:
Studia Orientalne; 2021, 1(19); 57-76
2299-1999
Pojawia się w:
Studia Orientalne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Determination of thermal diffusivity values based on the inverse problem of heat conduction - numerical analysis
Autorzy:
Adamowicz, Adam
Powiązania:
https://bibliotekanauki.pl/articles/2204678.pdf
Data publikacji:
2022
Wydawca:
Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:
thermal diffusivity
inverse heat conduction problem
impulse heating
finite element analysis
Opis:
This paper presents a discussion on the accuracy of the method of determining the thermal diffusivity of solids using the solution of the inverse heat conduction equation. A new measurement data processing procedure was proposed to improve the effectiveness of the method. Using the numerical model, an analysis of the sensitivity of the method of thermal diffusivity determination to changes in operational and environmental parameters of the test was carried out. The obtained results showed that the method was insensitive to the parameters of the thermal excitation impulse, the thickness of the tested sample, and the significant influence of convection cooling on its accuracy. The work was completed with the formulation of general conclusions concerning the conditions for determining the thermal diffusivity of materials with the use of the described method.
Źródło:
Acta Mechanica et Automatica; 2022, 16, 4; 399--407
1898-4088
2300-5319
Pojawia się w:
Acta Mechanica et Automatica
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 1632

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