Temat: numerical estimates - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Ukraińscy migranci zarobkowi w Polsce – dlaczego tak trudno ich policzyć?
Ukrainian labour migrants in Poland. Why is it so difficult to count them?
Autorzy:: Brunarska, Zuzanna
Powiązania:: https://bibliotekanauki.pl/articles/14727498.pdf
Data publikacji:: 2014
Wydawca:: Kancelaria Sejmu. Biuro Analiz Sejmowych
Tematy:: labour migration
migration
Polska
numerical estimates
Ukrainians
migration pattern
Opis:: The article discusses the characteristics of the Ukrainian labour migration to Poland. The author tries to answer the question of why it is so difficult to estimate the actual number of Ukrainians working in Poland. The first section provides a brief overview of available data and estimates. The following sections focus on selected elements of the migration patterns which cause difficulties in estimating the size of the population of Ukrainian workers. The analyses concern, inter alia, the imperfection of the system of employers’ declarations, alternative channels of legalization of stay, the temporality of migration, preferred job search and remittances sending methods, and the specificity of the main sectors of employment.
Źródło:: Studia BAS; 2014, 4(40); 155-174
2080-2404
2082-0658
Pojawia się w:: Studia BAS
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: On the fully discrete approximations of the MGT two-temperatures thermoelastic problem
Autorzy:: Baldonedo, J.
Fernández, J. R.
Quintanilla, R.
Powiązania:: https://bibliotekanauki.pl/articles/38695700.pdf
Data publikacji:: 2022
Wydawca:: Instytut Podstawowych Problemów Techniki PAN
Tematy:: two-temperatures thermoelasticity
finite elements
priori error estimates
numerical simulations
Opis:: We consider a one-dimensional two-temperatures thermoelastic model. The corresponding variational problem leads to a coupled system which is written in terms of the mechanical velocity, the temperature speed and the inductive temperature. An existence and uniqueness result is recalled. Then, fully discrete approximations are introduced by using the finite element method and the implicit Euler scheme. A priori error estimates are proved and the linear convergence of the approximations is deduced under suitable additional regularity conditions. Finally, some numerical simulations are shown to demonstrate the accuracy of the proposed algorithm and the behavior of the discrete energy.
Źródło:: Archives of Mechanics; 2022, 74, 5; 391-407
0373-2029
Pojawia się w:: Archives of Mechanics
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

Tytuł:: Error estimates for the finite-element approximation of a semilinear elliptic control problem
Autorzy:: Casas, E.
Troeltzsch, F.
Powiązania:: https://bibliotekanauki.pl/articles/206743.pdf
Data publikacji:: 2002
Wydawca:: Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:: aproksymacja numeryczna
metoda elementu skończonego
równanie eliptyczne półliniowe
sterowanie rozproszone
distributed control
error estimates
finite element method
numerical approximation
semilinear elliptic equation
Opis:: We consider the finite-element approximation of a distributed optimal control problem governed by a semilinear elliptic partial differential equation, where pointwise constraints on the control are given. We prove the existence of local approximate solutions converging to a given local reference solution. Moreover, we derive error estimates for local solutions in the maximum norm.
Źródło:: Control and Cybernetics; 2002, 31, 3; 695-712
0324-8569
Pojawia się w:: Control and Cybernetics
Dostawca treści:: Biblioteka Nauki

Artykuł

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