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Tytuł:
Implementation of MUSCL-Hancock method into the C++ code for the Euler equations
Autorzy:
Murawski, K.
Stpiczyński, P.
Powiązania:
https://bibliotekanauki.pl/articles/200996.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
hyperbolic equations
numerical methods
Godunow methods
Opis:
In this paper we present implementation of the MUSCL-Hancock method for numerical solutions of the Euler equations. As a result of the internal complexity of these equations solving them numerically is a formidable task. With the use of the original C++ code, we developed and presented results of a numerical test that was performed. This test shows that our code copes very well with this task.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2012, 60, 1; 45-53
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Constructing a Research Project: What Should We Pay Attention to When Applying Qualitative Methods? Discussion of the Proposals of King, Keohane, Verba
Autorzy:
Kapała, Magdalena
Powiązania:
https://bibliotekanauki.pl/articles/44950966.pdf
Data publikacji:
2023-03-23
Wydawca:
Akademia Pedagogiki Specjalnej im. Marii Grzegorzewskiej. Wydawnictwo APS
Tematy:
research project
qualitative methods
quantitative methods
Opis:
In this article, I will discuss the position of King, Keohane and Verba. Referring directly to the issues of sociology and political science, these authors set the main goal of their considerations to show how to design a research that brings accurate conclusions about social and political life. Many of their comments are applicable to research in other fields of science, including in psychology. Qualitative, and not only quantitative, methods can be very useful in researching the IT environment. Educational organizations can apply the conclusions from studies which connect the qualitative and quantitative methods to assist in the staff development to achieve organizational goals. Also -in process of proper recruitment of leaders in business management or to assist the stuff to raise the performing of professional tasks, even self-development of stuff members should also use the scientific research findings. Hence I consider both – quantitative but also qualitative methods – worth quoting and analyzing.
Źródło:
International Journal of Pedagogy, Innovation and New Technologies; 2022, 9(2); 60-72
2392-0092
Pojawia się w:
International Journal of Pedagogy, Innovation and New Technologies
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A method for solving the Neumann problem for the Poisson equation on the exterior of a poligon
Autorzy:
Roliński, Tomasz
Powiązania:
https://bibliotekanauki.pl/articles/747369.pdf
Data publikacji:
1993
Wydawca:
Polskie Towarzystwo Matematyczne
Tematy:
Boundary element methods
Finite elements, Rayleigh-Ritz and Galerkin methods, finite methods
Opis:
.
This paper is concerned with a numerical method for solving the problem Δu=f in Ωc (=intR2\Ω), (du/dn)|Γ=g, where ΩR2 is a polygon and Γ is the boundary of Ω. The method is based on coupling finite and boundary element techniques. To compensate for the loss of smoothness of the solution u near the corners of the polygon Ω we refine the triangulation without changing the number of triangles. We apply the affine triangular Lagrangean element of degree kN and the Lagrangean boundary element of degree k−1 to obtain the optimal order of convergence via the Galerkin projection.
Źródło:
Mathematica Applicanda; 1993, 22, 36
1730-2668
2299-4009
Pojawia się w:
Mathematica Applicanda
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Testing methods for vehicle shock absorbers
Autorzy:
Gardulski, J.
Powiązania:
https://bibliotekanauki.pl/articles/244102.pdf
Data publikacji:
2008
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
transport
vibroacoustic methods
testing methods
shock absorbers
Opis:
The suspension is the component decisive about safety of drive of cars, in which dumping elements have essential meaning, which the most often are telescopic hydraulic shock-absorbers. Therefore, in exploitation process so important investigations of their technical condition are in track which opinion of their usefulness should be made not only to more far exploitation, but also the identification of typical damages. The common used method in practical ways of diagnosing of shock-absorber in article was introduced. There are two methods of investigations: built from and shock-absorber built-in in vehicle suspension. In first method - in support about indicatory graph, the characteristic of suppression be appointive. They are the basis to diagnostic opinion of technical condition of studied damper. In second method the results of investigations have approximate character. From those methods the most often used station control of vehicles in Poland - method post EUSAMA and BOGE in article were described, which used in investigations the harmonic excitatory of vibrations stimulant to vibrations unsprung and sprung masses of vehicle. The car is so folded, vibrate mechanical stimulated by excitator to vibrations arrangement. The vibro-acoustic methods of analyses' of signals in article were introduced, which can be practical in investigations of diagnostic shock-absorber. They are then the method of multidimensional analysis of signal - the Short-Time Fourier Transforms (the STFT), Wigner - Ville'a and Wavelet.
Źródło:
Journal of KONES; 2008, 15, 2; 77-88
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical methods in fluid mechanics – an overview
Autorzy:
Sobieski, Wojciech
Šarler, Božidar
Powiązania:
https://bibliotekanauki.pl/articles/22672799.pdf
Data publikacji:
2023
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie
Tematy:
CFD
numerical modelling
mesh methods
meshless methods
Opis:
The article presents in a review way the most important numerical methods used in modern fluid mechanics. The individual chapters discuss Finite Difference Method, Finite Volume Method, Lattice Boltzmann Method, Discrete Element Method and Smoothed Particle Hydrodynamics. The aim of the article is to familiarize the reader with the most important concepts, features and mathematical equations used in particular methods. The article is intended mainly for people who want to get acquainted with the current possibilities of numerical modelling in the field of broadly understood fluid mechanics. The material is intended to facilitate the decision on how to implement the planned play research.
Źródło:
Technical Sciences / University of Warmia and Mazury in Olsztyn; 2023, 26(1); 185--218
1505-4675
2083-4527
Pojawia się w:
Technical Sciences / University of Warmia and Mazury in Olsztyn
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Unusual graphic solutions and their place in classification of cartographic presentation methods
Autorzy:
Korycka-Skorupa, Jolanta
Kacprzyk, Izabela
Miłaszewska, Małgorzata
Powiązania:
https://bibliotekanauki.pl/articles/2030311.pdf
Data publikacji:
2008-06-01
Wydawca:
Uniwersytet Warszawski. Wydział Geografii i Studiów Regionalnych
Tematy:
visualisation
cartographic presentation methods
ordinal methods
choropleth map
Opis:
Examples of unusual and unconventional graphic solutions which we can often find in the times of fast developing computer technology are discussed in the article. Many of them are suggested by various GIS programs, few of them may be found in the press or on the Internet. This means that their users are people who are not associated with cartography and who are not familiar with the framework of cartographic methods.
Źródło:
Miscellanea Geographica. Regional Studies on Development; 2008, 13; 289-298
0867-6046
2084-6118
Pojawia się w:
Miscellanea Geographica. Regional Studies on Development
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The National Security Culture and the Power of the State. A Scientific Study
Autorzy:
Piwowarski, Juliusz
Powiązania:
https://bibliotekanauki.pl/articles/1832118.pdf
Data publikacji:
2015
Wydawca:
Wyższa Szkoła Bezpieczeństwa Publicznego i Indywidualnego Apeiron w Krakowie
Tematy:
Security
culture
power
state
qualitative methods
quantitative methods
Opis:
Article presents the form and perspectives for scientific research provided in the area of measurement of the power of state. Author sees the power of state as a part of security culture concept. Several ways of analysing and scientific research methods are presented, with their advantages and disadvantages, stressing both qualitative and quantitative factors. The theoretical basis is also included, with presentation of many different approaches.
Źródło:
Security Dimensions; 2015, 15(15); 31-48
2353-7000
Pojawia się w:
Security Dimensions
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Polydiagnostics performed on high - tech plasmas
Autorzy:
van der Mullen, J. J. A. M.
Palomares, J. M.
Iordanova, E.
Hübner, S.
Carbone, E. A. D.
Powiązania:
https://bibliotekanauki.pl/articles/147834.pdf
Data publikacji:
2012
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
polydiagnostics
high-tech plasmas
passive methods
active methods
Opis:
The large effluxes generated by high-tech plasmas force plasmas to non-equilibrium conditions. This implies that plasma features are decoupled from each other and that therefore different methods have to be used quasi-simultaneously to characterize the plasma. Even more insight in plasmas and methods is obtained if polydiagnostics is applied to a series of plasma conditions that gradually differ in equilibrium departure. After discussing methods of passive and active spectroscopy, we apply polydiagnostics on an argon plasma operated in open air. By introducing H2 and reducing the power we approach conditions of cool atmospheric plasmas (CAPs). It is seen that especially the passive methods for the electron temperature determination are very sensitive to the degree of equilibrium departure suggesting that active spectroscopy is preferable. However, one should realize that lasers can easily heat cool plasmas. This is due to the fact that the ionization degree of (semi-) CAPs is small.
Źródło:
Nukleonika; 2012, 57, 2; 147-155
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Systematyka metod oceny jakości działalności marketingowej organizacji
Systematics of quality assessment methods for business marketing organizations
Autorzy:
Szyran-Resiak, Agata
Powiązania:
https://bibliotekanauki.pl/articles/447025.pdf
Data publikacji:
2015
Wydawca:
Mazowiecka Uczelnia Publiczna w Płocku
Tematy:
systematics
methods of assessing the quality of an organization's marketing activities
qualitative methods
quantitative methods
qualitative and quantitative methods (mixed)
Opis:
This study presents detailed systematics of quality assessment methods for marketing organizations diving it into three groups: qualitative, quantitative and qualitative-quantitative (mixed) methods. The first group includes methods such as: marketing audit, marketing excellence evaluation and review oftheethical and social responsibility of the organization. The second group is: sales analysis, market share analysis, impact analysis with marketing expenditures on sales area, financial analysis, profitability and efficiency control, marketing effectiveness ranking and observation on customer satisfaction. The last group includes methods: balanced scorecard and marketing benchmark. Approach towards assessing the quality of organization's marketing activities requires using one particular method. Due to big number of existing methods for assessing the quality of marketing activities, a question arises: which one will allow us fully assess the activity.
Źródło:
Zeszyty Naukowe PWSZ w Płocku. Nauki Ekonomiczne; 2015, 2(22); 35-48
1644-888X
Pojawia się w:
Zeszyty Naukowe PWSZ w Płocku. Nauki Ekonomiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of patch substructuring methods
Autorzy:
Gander, M. J.
Halpern, L.
Magoules, F.
Roux, F. X.
Powiązania:
https://bibliotekanauki.pl/articles/929707.pdf
Data publikacji:
2007
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
metoda rozkładu
metoda dopełniacza Schura
zoptymalizowana metoda Schwarza
Schwarz domain decomposition methods
Schur complement methods
patch substructuring methods
optimized Schwarz methods
Opis:
Patch substructuring methods are non-overlapping domain decomposition methods like classical substructuring methods, but they use information from geometric patches reaching into neighboring subdomains, condensated on the interfaces, to enhance the performance of the method, while keeping it non-overlapping. These methods are very convenient to use in practice, but their convergence properties have not been studied yet. We analyze geometric patch substructuring methods for the special case of one patch per interface. We show that this method is equivalent to an overlapping Schwarz method using Neumann transmission conditions. This equivalence is obtained by first studying a new, algebraic patch method, which is equivalent to the classical Schwarz method with Dirichlet transmission conditions and an overlap corresponding to the size of the patches. Our results motivate a new method, the Robin patch method, which is a linear combination of the algebraic and the geometric one, and can be interpreted as an optimized Schwarz method with Robin transmission conditions. This new method has a significantly faster convergence rate than both the algebraic and the geometric one. We complement our results by numerical experiments.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2007, 17, 3; 395-402
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The optimal explicit unconditionally stable box scheme
Autorzy:
Moszyński, Krzysztof
Powiązania:
https://bibliotekanauki.pl/articles/747543.pdf
Data publikacji:
1997
Wydawca:
Polskie Towarzystwo Matematyczne
Tematy:
Finite difference methods
Stability and convergence of numerical methods
Opis:
.
The finite difference “box” scheme, (see also [1],[2]), is considered on the simplest possible model of single first order linear hyperbolic equation: ut+mux=0 with constant, coefficient m, and one space variable. The optimal version of the scheme, which is nonoscilating and unconditionally stable with respect to the initial and boundary conditions, is derived in the class of box schemes of the order at, least one. If apropriately iterated, this ścinane may be applied to general systems of quasilinear first order hyperbolic equations in one space variable, as an explicit, unconditionally stable solver. For more than one space variable this solver is applicable via splitting (see [3]).
Źródło:
Mathematica Applicanda; 1997, 26, 40
1730-2668
2299-4009
Pojawia się w:
Mathematica Applicanda
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Difference method for a nonlinear parabolic equation of second order in two space variables
Autorzy:
Kawecki, Roman
Powiązania:
https://bibliotekanauki.pl/articles/747916.pdf
Data publikacji:
1990
Wydawca:
Polskie Towarzystwo Matematyczne
Tematy:
Finite difference methods
Stability and convergence of numerical methods
Opis:
.
A.C. Reynolds in his paper (1972) proposed a difference parametric method for solving the Fourier problem for a nonlinear parabolic equation of second order in one space variable. The paper presents a generalization of Reynolds’ method for the problem in two space variables with mixed derivatives. In this paper, Fourier problems for a general class of nonlinear parabolic equation, in QT = Q x [0, T], are studied. To solve this problem we construct a finite difference scheme with a real parameter. We prove that the solutions of certain associated finite difference equations are unique and converge to the solution of the initial-boundary value problem with 0(h^2) rate of convergence.
Źródło:
Mathematica Applicanda; 1990, 18, 32
1730-2668
2299-4009
Pojawia się w:
Mathematica Applicanda
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Metody pracy w pracy socjalnej
Autorzy:
Czarnecki, Paweł
Powiązania:
https://bibliotekanauki.pl/articles/2141553.pdf
Data publikacji:
2010
Wydawca:
Instytut Studiów Międzynarodowych i Edukacji Humanum
Tematy:
methods
social work
Opis:
The notion of a method is not identical with the notion of model of social work, although different models assume different methods of work. Many models of social work have been created. One can mention, for example, the psychosocial model (based on the assumption that the cause of the problems of an individual are unconscious, unrealized conflicts and unfulfilled, subconscious needs; the solution of the problems is sought through an analysis of events and experiences from the past), problemic, structural, model of modification of behaviours; group therapy, resocialization model, crisis model etc. Thus, in the functional model, one puts the emphasis on building the relation with the ward, maximal use of the time given and avoiding diagnostic categories as useless in social work. The problem-oriented model bases on the assumption that problems are an inevitable element of life, their solution is sought through analysing present factors, the main emphasis is put on the ward's involvement in the solving of the problem, the task of the social worker is determining the ward's subjective attitude to the problem and motivating him to action. The structural model is based on the assuption that the individual's problems are the effect of a definite social structure and they do not result from personal neglect, and the basis of help is support for the client and his immediate social environment. The model of behaviour modification, based on psychological behaviourism, assumes that through employing knowledge about the mechanisms of learning one can change attitudes and the way the individual reacts49. It is worth mentioning also models which integrate social work with individuals, groups and communities. An example of such a model is the systemic model, in the frames of which one can differentiate several variants, e. g. ecological, life model, competence model). In the systemic model one emphasizes the improvement of relations between the ward and his or her social environment through seeking a system of social support, rejecting the view that the ward's situation can be improved through actions directed exclusively onto him or her or their environment methods.
Źródło:
Humanum. Międzynarodowe Studia Społeczno-Humanistyczne; 2010, 2(5); 233-252
1898-8431
Pojawia się w:
Humanum. Międzynarodowe Studia Społeczno-Humanistyczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The assessment of the impact of myofascial training on postural control – a case study
Autorzy:
Guzik, Agnieszka
Chwaszcz, Bartłomiej
Drużbicki, Mariusz
Wolan-Nieroda, Andżelina
Wyszyńska, Justyna
Powiązania:
https://bibliotekanauki.pl/articles/454773.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet Rzeszowski. Wydawnictwo Uniwersytetu Rzeszowskiego
Tematy:
balance
eccentric muscle work
qualitative methods
stretching
quantitative methods
Opis:
Introduction. A sedentary lifestyle with lack of physical activity contributes to deteriorated balance among healthy young people. Physical activity is import_ant since it stimulates neuromuscular junctions that control body posture, especially at younger age, when greater postural sway may be observed in stabilography compared to adults. Proper work of individual muscle groups is import_ant to maintain proper balance. Abnormal muscle tone can lead to dysbalances that make it difficult o maintain a stable posture in a variety of conditions. Aim. The aim of the study was to evaluate the effect of a training cycle consisting of stretching of the ilopsoas, rectus femoris, gluteus maximus, hamstring and rectus abdominis, and eccentric training of the above mentioned muscles to improve static and dynamic balance. Methods. Oobjective and qualitative-subjective were used to assess the results in a man aged 22 yrs. Postural control was tested twice in the patient with the Neurocom International Inc. SMART EquiTest device under static conditions without visual control and with dynamic visual surrounding and unstable support surface. Automatic postural reflexes were also evaluated. In addition, clinical tests were performed. Results. Myo-fascial training, which included eccentric training combined with lower limb and trunk stretching improved the postural control in the subject.
Źródło:
European Journal of Clinical and Experimental Medicine; 2017, 1; 71-77
2544-2406
2544-1361
Pojawia się w:
European Journal of Clinical and Experimental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Properties of projection and penalty methods for discretized elliptic control problems
Autorzy:
Cegielski, Andrzej
Grossmann, Christian
Powiązania:
https://bibliotekanauki.pl/articles/729435.pdf
Data publikacji:
2007
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
convex programming
control of PDE
projection methods
penalty methods
Opis:
In this paper, properties of projection and penalty methods are studied in connection with control problems and their discretizations. In particular, the convergence of an interior-exterior penalty method applied to simple state constraints as well as the contraction behavior of projection mappings are analyzed. In this study, the focus is on the application of these methods to discretized control problem.
Źródło:
Discussiones Mathematicae, Differential Inclusions, Control and Optimization; 2007, 27, 1; 23-41
1509-9407
Pojawia się w:
Discussiones Mathematicae, Differential Inclusions, Control and Optimization
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Testing the randomness of lithostratigraphic successions with the Markov Chain methods
Autorzy:
Doktor, M.
Krawczyk, A.
Mastej, W.
Powiązania:
https://bibliotekanauki.pl/articles/191918.pdf
Data publikacji:
2010
Wydawca:
Polskie Towarzystwo Geologiczne
Tematy:
Markov chain methods
Monte Carlo methods
coal-bearing successions
Opis:
The crucial role in the studies on layer successions in lithostratigraphic sections with the application of stochastic model of depositional processes represented by the Markov chain is played by correct estimation of the matrix of transition numbers between lithofacies expected in a random sequence. Methods known from the literature are iteration procedures, which do not ensure quick, general solution. Hence, we propose a universal method based upon the Monte Carlo simulation technique. This method enables the researcher to estimate precisely and reliably the expected matrix of facies transitions.
Źródło:
Annales Societatis Geologorum Poloniae; 2010, 80, No 2; 163-166
0208-9068
Pojawia się w:
Annales Societatis Geologorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Alternating direction Galerkin method for quasilinear parabolic equations
Autorzy:
Dryja, M.
Powiązania:
https://bibliotekanauki.pl/articles/748658.pdf
Data publikacji:
1979
Wydawca:
Polskie Towarzystwo Matematyczne
Tematy:
Finite elements, Rayleigh-Ritz and Galerkin methods, finite methods
Opis:
MR0549983
Consider the following parabolic equation: (1) ∂u/∂t−∑2i=1(d/dxi)ai(x,t,u,D1u,D2u)+a0(x,t,u,D1u,D2u)=f(x,t), x=(x1,x2)∈Ω⊂R2, t∈[0,T], with the initial value condition u(x,0)=u0(x), x∈Ω, and with the boundary value condition u(x,t)=0, x∈∂Ω, t∈[0,T]. For the solution of equation (1) the author proposes a variational-difference method. Namely, he approximates equation (1) by Galerkin's method with respect to the variables x1,x2 and by the finite-difference method with respect to the variable t. Under some assumptions concerning the coefficients ai, i=0,1,2, an estimate of the error is given.
Źródło:
Mathematica Applicanda; 1979, 7, 15
1730-2668
2299-4009
Pojawia się w:
Mathematica Applicanda
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Superconvergence in the finite element method
Autorzy:
Leyk, Zbigniew
Powiązania:
https://bibliotekanauki.pl/articles/748740.pdf
Data publikacji:
1982
Wydawca:
Polskie Towarzystwo Matematyczne
Tematy:
Finite elements, Rayleigh-Ritz and Galerkin methods, finite methods
Opis:
MR0707821
For some variants of the finite element method there exist points having a remainder value or a derivation remainder remarkably less than those given by global norms. This phenomenon is called superconvergence and the points are called superconvergence points. The generalized problem corresponding to (1) is as follows: Let Hk(Ω) be Sobolev space and Hk0(Ω) the completion of the space C∞0(Ω) with norm ∥⋅∥k,Ω. Find u∈H10(Ω) such that for each v∈H10(Ω), (2) a(u,v)=(f,v)0 holds, where a(u,v)=∫Ω(∑n|α|=0aα(x)DαuDαv)dx, (f,v)0=∫Ωf(x)v(x)dx, Dα=Dα11⋯Dαnn,1.5pt Dαiiu=∂αiu/∂xαii, i=1,n¯¯¯¯¯¯¯¯. The approximate problem of the finite element variant considered is the following: Find uh∈Vh such that (3) for all v∈Vh, a(uh,v)=(f,v)0. The main result is the theorem: Let ai∈C(Ω¯), D1ai,D2ai∈L∞(Ω),i=1,2,∥σ∥∞L(Ω)≤σ,f∈L2(Ω). Suppose the eigenvalues of the operator L are different from zero, and u∈H4(Ω)∩H10(Ω). Then there exists h0 such that for h≤h0, h2∑P∈G|grad(u−uh)(P)|≤Ch3(|u|3+|u|4), where u and uh are the solutions of problems (2) and (3), respectively, and C is some constant independent of h. Further, |u|k={∫Ω(∑|α|=k(Dαu)2)dx}1/2, G=⋃N1N2i=1Fi(R), R={(±3√/3,±3√/3)} is a Gauss point set in the quadrant S={(ξ1,ξ2):|ξk|≤1,k=1,2}, and Fi(F(1)i,F(2)i):S→ei, ei an element; F(1)i(ξ1,ξ2)=x(i)0+h1ξ1/2, F(2)i(ξ1,ξ2)=y(i)0+h2ξ2/2, and (x(i)0,y(i)0) is the middle element.
Źródło:
Mathematica Applicanda; 1982, 10, 20
1730-2668
2299-4009
Pojawia się w:
Mathematica Applicanda
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Remarks on the scheme of simple sampling with replacement
Autorzy:
Wagner, Wiesław
Mantaj, Andrzej
Powiązania:
https://bibliotekanauki.pl/articles/658405.pdf
Data publikacji:
2011
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
reoresentative methods
replacement
Opis:
Wyróżnia się losowanie proste bez zwracania (lpbz) oraz ze zwracaniem (lpzz). Oba schematy określa się jako indywidualne losowania nieograniczone zależne i niezależne. Schemat lpzz ze skończonej populacji generalnej zawierającej N jednostek jest stosowany w sytuacjach, gdy dopuszcza się możliwość wielokrotnego występowania tych samych jednostek w wylosowanej próbie. Ma to miejsce wtedy, gdy pobieranie jednostek odbywa się przy niezmiennym jej składzie, czyli prawdopodobieństwo wyboru każdej jednostki z populacji generalnej jest stałe i pozostaje jednakowe w całym procesie losowania próby. W pracy przedstawiono ogólny model matematyczny schematu losowania ze zwracaniem, wzory na liczbę prób wyrażoną wariacją z powtórzeniami, podano prawdopodobieństwo wyloso- wania prób z zadanym elementem oraz wyprowadzono różnymi sposobami wzór na prawdopodobieństwo przynależności rzędu drugiego zadanej pary jednostek. Niektóre wzory zilustrowano przykładami.
Źródło:
Acta Universitatis Lodziensis. Folia Oeconomica; 2011, 255
0208-6018
2353-7663
Pojawia się w:
Acta Universitatis Lodziensis. Folia Oeconomica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Economic and logistic research methods
Autorzy:
Kowalczyk, Anna
Powiązania:
https://bibliotekanauki.pl/articles/1181234.pdf
Data publikacji:
2017
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
methods
researches
science
Opis:
In this papers the methods for economic researches used in i.e. logistics are presented. The concern of economic researches is important for scientists and for businessmen. The knowledge of methods and theirs skilful application enables the optimization of management and of cognitive processes.
Źródło:
World Scientific News; 2017, 72; 544-549
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Pre-hospital methods of oxygen therapy and airway management in patients with suspected or confirmed COVID-19
Przedszpitalne metody tlenoterapii i udrożnienia dróg oddechowych u pacjentów z podejrzeniem lub potwierdzonym COVID-19
Autorzy:
Kmieciak, Andrzej
Kubiak, Kamil
Kotliński, Krzysztof
Powiązania:
https://bibliotekanauki.pl/articles/1033275.pdf
Data publikacji:
2020
Wydawca:
Towarzystwo Pomocy Doraźnej
Tematy:
airway patency methods
Opis:
There are many treatment suggestions for patients infected with SARS-CoV-2 virus during the coronavirus epidemic. The most common patterns of practice, which are publicly available on social media and medical portals, mainly concern mechanical ventilation methods, but these are examples used in intensive care units. After a retrospective analysis of most recommendations, good practices, guidelines, and primarily based on our experience, the authors of this article prepared a short compendium on safe oxygen therapy in patients suspected or confirmed with the SARS-CoV-2 virus and safe methods of instrumental airway management, minimizing production aerosol. The methods of conducting passive oxygen therapy, controlling breathing, clear upper airway with use of supraglottic devices and modified endotracheal intubation will allow medical personnel to increase their safety in supplying airway management in patients with suspected or confirmed COVID-19. This is extremely important in times of epidemic, where medical personnel in prehospital care is at high risk of being infected with SARS-CoV-2 virus.
Istnieje wiele sugestii dotyczących leczenia pacjentów zakażonych wirusem SARS-CoV-2 podczas epidemii. Najczęstsze praktyczne wzorce, które są publicznie dostępne w mediach społecznościowych i portalach medycznych, dotyczą głównie metod wentylacji mechanicznej, ale są to przykłady stosowane na oddziałach intensywnej terapii. Po retrospektywnej analizie rekomendacji, dobrych praktyk, wytycznych i przede wszystkim w oparciu o własne doświadczenie, autorzy przygotowali krótkie kompendium na temat bezpiecznej terapii tlenowej u pacjentów podejrzanych lub z potwierdzonym zakażeniem wirusem SARS-CoV-2 oraz bezpiecznych metod przyrządowego udrożniania dróg oddechowych, minimalizujących produkcję aerozolu. Metody prowadzenia pasywnej terapii tlenowej, kontrolowanie oddychania, oczyszczanie górnych dróg oddechowych za pomocą przyrządu nadgłośniowego i zmodyfikowana intubacja dotchawiczna pozwolą personelowi medycznemu zwiększyć bezpieczeństwo podczas zabezpieczenia dróg oddechowych u pacjentów z podejrzeniem lub potwierdzonym COVID-19. Jest to niezwykle ważne w czasach epidemii, w której personel medyczny w opiece przedszpitalnej jest narażony na duże ryzyko zarażenia wirusem SARS-CoV-2.
Źródło:
Critical Care Innovations; 2020, 3, 2; 16-28
2545-2533
Pojawia się w:
Critical Care Innovations
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On asymptotic expansions of global errors
Autorzy:
Pfeifer, Eckhard
Powiązania:
https://bibliotekanauki.pl/articles/747786.pdf
Data publikacji:
1990
Wydawca:
Polskie Towarzystwo Matematyczne
Tematy:
Finite difference methods
Opis:
.
We consider a linear partial differential equation with constant coefficients and the corresponding difference equation. Conditions are given under which the error possesses an asymptotic expansion with respect to h. These results are applied to obtain asymptotic expansions of some quadratures and of the approximate solution of a boundary value problem for a second order differential equation.
Źródło:
Mathematica Applicanda; 1990, 18, 32
1730-2668
2299-4009
Pojawia się w:
Mathematica Applicanda
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Najnowsze metody nieniszczące wykorzystywane w badaniach w budownictwie
The latest non-destructive methods used in research in construction
Autorzy:
Schabowicz, K.
Powiązania:
https://bibliotekanauki.pl/articles/107874.pdf
Data publikacji:
2018
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
obiekty budowlane
diagnostyka
metody badawcze
metody nieniszczące
civil structures
diagnostics
test methods
nondestructive methods
seminondestructive methods
Opis:
W artykule przedstawiono najnowsze metody nieniszczące wykorzystywane w badaniach w budownictwie. Zamieszczono przegląd i opis wybranych metod. Pokazano przede wszystkim przydatne do tego celu najnowsze metody nieniszczące. Można zaobserwować, iż rozwój metod badawczych jest ukierunkowany na ocenę w elementach i konstrukcjach innych cech niż wytrzymałość. Następuje on w kierunku konstruowania aparatury badawczej pozwalającej uzyskiwać precyzyjne dane odnośnie do struktury badanego elementu zarówno w skali makro, jak i mikro, a czasem i nano. Daje to możliwość pełniejszej oceny jakości wykonania poszczególnych elementów w obiekcie budowlanym i jego konstrukcji.
This paper presents the latest non-destructive methods used in research in construction. The classification of the methods are included. The most interesting of the methods are described. A focus is on the latest nondestructive. Today the development of test methods is oriented towards the evaluation of the characteristics of structures and structural components other than strength. The development of equipment enabling one to obtain an accurate image of the inside structure of the tested element in macro, micro and nano scale. An extensive survey of the literature on the subject, which researchers and experts in the diagnostics of civil structures may find useful, is included.
Źródło:
Badania Nieniszczące i Diagnostyka; 2018, 3; 48-51
2451-4462
2543-7755
Pojawia się w:
Badania Nieniszczące i Diagnostyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Characteristics of advanced methods used for typing bacterial isolates from mastitis with particular reference to Staphylococci
Autorzy:
Lisowska-Łysiak, K.
Dudko, P.
Kosecka-Strojek, M.
Walczak, J.
Wójcik, P.
Międzobrodzki, J.
Powiązania:
https://bibliotekanauki.pl/articles/2087754.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
coagulase-negative staphylococci
genetic methods
mastitis
phenotypic methods
Staphylococcus aureus
Źródło:
Polish Journal of Veterinary Sciences; 2018, 21, 1; 229-239
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On an application of an interval backward finite difference method for solving the one-dimensional heat conduction problem
Autorzy:
Jankowska, M.
Marciniak, A.
Hoffmann, T.
Powiązania:
https://bibliotekanauki.pl/articles/205521.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
interval methods
interval arithmetic
finite difference methods
heat conduction problem
Opis:
The paper concerns the interval method for solving the one-dimensional heat conduction problem. It is based on the conventional backward finite difference scheme with the appropriate local truncation error terms that are also taken into account. For the theoretical formulation of the interval approach we can show that the exact solution is included in the interval one. In practice, there are problems, for which we cannot determine the endpoints of the error term intervals exactly. Nevertheless, if we use the appropriate approximation, related to the endpoints considered, then the numerical experiments confirm that the interval solution includes the exact one.
Źródło:
Control and Cybernetics; 2015, 44, 4; 463-480
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The application of electrical resistivity tomography (ERT), induced polarization (IP) and electromagnetic conductivity (EMC) methods for the evaluation of technical condition of flood embankment corpus
Autorzy:
Cygal, A.
Stefaniuk, M.
Kret, A.
Kurowska, M.
Powiązania:
https://bibliotekanauki.pl/articles/184207.pdf
Data publikacji:
2016
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
conductivity methods
resistivity tomography
induced polarization methods
river flood embankment
Opis:
A series of catastrophic floods that have occurred over the last twenty years in Poland brought an urgent need for taking preventive steps to monitor river embankment conditions. The main problem seems to be the development of efficient (i.e. fast and economical) measurements for controlling the condition of river embankments, because the execution of the full range of geotechnical measurements is both lengthy and costly. In this situation, a cheap and quick geophysical survey has been proposed to undertake this purpose. In this article the results of geophysical surveys are described which were performed using geoelectric and electromagnetic methods along a section of the Vistula embankment, located near the Maniów area in the Małopolska province. According to the archival data, this region is situated in a high-risk flooding zone. Three geophysical methods were used to recognize conditions of the levee: (i) Electrical Resistivity Tomography (ERT), (ii) Induced Polarization (IP) and (iii) Electromagnetic Conductivity (EMC). Geoelectrical measurement results were presented in the form of resistivity and polarization cross-sections. Results of conductivity measurement were presented in the form of plots. These parameters effectively supplement geotechnical testing, providing spatial information about the changes within the embankment and its substrate. It allows the prediction of potentially vulnerable areas to water percolation during flooding.
Źródło:
Geology, Geophysics and Environment; 2016, 42, 3; 279-287
2299-8004
2353-0790
Pojawia się w:
Geology, Geophysics and Environment
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Rodzina modeli Lee-Cartera
Autorzy:
Ojrzyńska, Anna
Powiązania:
https://bibliotekanauki.pl/articles/587418.pdf
Data publikacji:
2013
Wydawca:
Uniwersytet Ekonomiczny w Katowicach
Tematy:
Metody prognozowania
Metody statystyczne
Umieralność
Forecasting methods
Mortality
Statistical methods
Opis:
This paper presents a proposal for the application of selected models of the group of models using the Lee and Carter methodology for forecasting mortality rates. These include the original Lee-Carter, the Lee-Miller (2001) and Booth-Maindonald-Smith (2002) variants, and the more flexible Hyndman-Ullah (2005) and de Jong (2006) extensions. Based on estimates of mortality rates derived from the selected models was verified the ability to use these models to estimate mortality rates in Poland.
Źródło:
Studia Ekonomiczne; 2013, 162; 99-106
2083-8611
Pojawia się w:
Studia Ekonomiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Validation of the pressure wave model in the aspect of special structures endurance
Autorzy:
Barnat, W.
Powiązania:
https://bibliotekanauki.pl/articles/202084.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
explosion
analytical methods
numerical methods
eksplozja
metody analityczne
metody numeryczne
Opis:
The article presents results of the research on the validation of impact wave in the aspect of special structures’ endurance. Impact waves have been examined according to numerical and analytical methods. In order to verify the results obtained, a workstation for experimental research had been prepared. Before conducting the experiment, approximate pressure value had been checked empirically. The pressure had been measured using sensors for free wave measurements. The topic of the paper is empirical examination of the phenomenon of explosion in the aspect of the free wave pressure. Due to a difficulty of the issue, it was necessary to conduct complex examination of the phenomenon for various charges. The paper examines cases of spherical charge explosions with a balanced mass of 1 kg TNT.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2015, 63, 3; 707-716
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Spór metodologiczny czy spór koncepcji - badania ilościowe vs jakościowe
Methodological or theoretical framework controversy - qualitative versus quantitative research
Autorzy:
Paluchowski, Władysław Jacek
Powiązania:
https://bibliotekanauki.pl/articles/2128550.pdf
Data publikacji:
2010
Wydawca:
Katolicki Uniwersytet Lubelski Jana Pawła II. Towarzystwo Naukowe KUL
Tematy:
methodology
quantitative methods
qualitative methods
metodologia
metody ilościowe
metody jakościowe
Opis:
W artykule porównuje się różne aspekty metod ilościowych i jakościowych. Jednym ze stawianych pytań jest to, jak badacze wybierają paradygmat i związaną z nim metodologię. Czy jest to efekt różnic w określeniu istoty badanych zjawisk? Być może kluczowym czynnikiem jest odmienność stylów myślenia. Zalety i wady badań jakościowych i ilościowych są przedmiotem odwiecznych gorących dyskusji. Ta polemika raczej zaciemnia niż rozjaśnia i dzieli zamiast łączyć. Czy spór ten ma charakter wewnątrz- czy ponadaparadygmatyczny? Z jednej strony puryści ilościowi uważają, że realizują pozytywistyczne ideały, a z drugiej jakościowi puryści odrzucają pozytywistyczny paradygmat. Głównym jednak pytaniem pozostaje, co ma być celem badania naukowego. W ostatniej części artykułu rekomendowane jest podejście pragmatyczne oraz łączenie metod jakościowych i ilościowych.
This article compares and contrasts some aspects of qualitative and quantitative research approaches. The question is: how does a researcher select a research paradigm and corresponding methodology? Is this choice a consequence of the nature or essence of the social phenomena being investigated? The researcher’s thinking style is probably a key factor for the preferred choice of methods. The strengths and weaknesses of qualitative and quantitative research are a perennial and hot themes of debate, especially in psychology. Much of this debate has tended to obfuscate rather than clarify the problem, and to divide rather than unite researchers. Is this the inter-paradigm debate or is it a dispute between competing paradigms? Quantitative purists express assumptions that are consistent with positivist philosophy, whereas qualitative purists reject positivism. However, the major question remains: What is the goal of investigation? The final section of the paper advocates a “pragmatic approach” as a new guiding paradigm and as a basis for supporting work that combines qualitative and quantitative methods.
Źródło:
Roczniki Psychologiczne; 2010, 13, 1; 7-22
1507-7888
Pojawia się w:
Roczniki Psychologiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Methods Used in Undergraduate Study Programmes for Tourism and Sustainability at the University of Latvia
Autorzy:
Bērziņa, Kristīne
Ilze, Medne
Powiązania:
https://bibliotekanauki.pl/articles/1390623.pdf
Data publikacji:
2016
Wydawca:
Wyższa Szkoła Bankowa w Poznaniu
Tematy:
tourism
tourism education
sustainability
quantitative research methods
qualitative research methods
Opis:
Globalisation in education sector, intense competition between universities in Latvia, increase in requirements of applied teaching from private companies, growing exactingness from students – it all makes base to improve University curricula using different active teaching techniques for better knowledge capture. In the case study of University of Latvia tourism study programme authors included practice of active teaching method application used to improve student understanding and competences including research, surveys, observations, shadowing, monitoring and register of the tourist tracks, expert interviews and industry seminars, discussions and interviews with industry stakeholders, field trips, different tourism sector enterprise and organisation visits inspections, colloquiums, research result presentations in seminars and conferences, knowledge enhancing for sustainability, best practices and systems used by other countries. Many of active learning methods are as additional activities for students not included in the compulsory part of studies, therefore it is needed to establish an additional separate entity for tourism and sustainability activities for applied teaching and research at university – Tourism and Sustainability Research Laboratory. Separate research entity gives possibility to involve interested students from different study programmes and cooperation with other faculties.
Źródło:
Studia Periegetica; 2016, 15(1); 133-143
1897-9262
2658-1736
Pojawia się w:
Studia Periegetica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Approximation methods for a class of discrete Wiener-Hopf equations
Autorzy:
Nowak, M. A.
Powiązania:
https://bibliotekanauki.pl/articles/255249.pdf
Data publikacji:
2009
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
projection methods
iterative methods
discrete Wiener-Hopf equations
Toeplitz operators
Opis:
In this paper, we consider approximation methods for operator equations of the form Au + Bu = ƒ, where A is a discrete Wiener-Hopf operator on lp (1≤ p < ∞) which symbol has roots on the unit circle with arbitrary multiplicities (not necessary integers). Conditions on perturbation B and ƒ are given in order to guarantee the applicability of projection-iterative methods. Effective error estimates, and simultaneously, decaying properties for solutions are obtained in terms of some smooth spaces.
Źródło:
Opuscula Mathematica; 2009, 29, 3; 271-288
1232-9274
2300-6919
Pojawia się w:
Opuscula Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zastosowanie metod symulacji komputerowej w badaniach hałasu przemysłowego
The use of computer simulation methods in industrial noise research
Autorzy:
Kuboszek, A.
Powiązania:
https://bibliotekanauki.pl/articles/112730.pdf
Data publikacji:
2016
Wydawca:
STE GROUP
Tematy:
hałas
metody symulacyjne
metody geometryczne
noise
simulation methods
geometric methods
Opis:
W artykule przedstawiono przykłady wykorzystania komputerowych metod symulacji zjawisk akustycznych w pracach projektowych zmierzających do opracowania optymalnych sposobów ograniczenia hałasu na stanowisku pracy. Zastosowanie symulacji komputerowej daje możliwość opracowania strategii prac wyciszeniowych najkorzystniejszej pod kątem skuteczności akustycznej oraz opłacalności ekonomicznej.
This paper presents examples of using computer-based methods of acoustic simulation for optimal designing of noise reduction projects at the workplaces. Using of the acoustic simulations provides the opportunity to develop optimal strategies for noise reduction in terms of acoustic efficiency and cost-effectiveness.
Źródło:
Systemy Wspomagania w Inżynierii Produkcji; 2016, 2 (14); 199-210
2391-9361
Pojawia się w:
Systemy Wspomagania w Inżynierii Produkcji
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optimal control problem for Roesser systems
Autorzy:
Biły, Barbara
Powiązania:
https://bibliotekanauki.pl/articles/747892.pdf
Data publikacji:
1990
Wydawca:
Polskie Towarzystwo Matematyczne
Tematy:
Methods of nonlinear programming type
Computational methods
Discrete-time systems
Opis:
.
The quadratic performance index in a fixed rectangle for the Roesser model of two-dimensional, linear, stationary, discrete systems is considered. Using a method of transformation for the System and the performance index, the problem of finding the optimal sequence of control vectors is solved by a method of mathematical programming. The simple numerical example illustrates the presented method.
Źródło:
Mathematica Applicanda; 1990, 18, 32
1730-2668
2299-4009
Pojawia się w:
Mathematica Applicanda
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Weight versus reference point multiple criteria decision making methods - analogies and differences
Autorzy:
Kaliszewski, I.
Powiązania:
https://bibliotekanauki.pl/articles/307708.pdf
Data publikacji:
2003
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
podejmowanie decyzji
multiple criteria decision making
weight methods
reference point methods
Opis:
In this work we shall be concerned with interactive multiple criteria decision making methods. We show how on the technical level the class of reference point methods can be reduced to the class of weight methods. Though methods from these two classes represent two different interactive decision making paradigms, the equivalence observed opens a way for a joint implementation of a pair of methods each representing a different class. This would establish a firm ground for systematic comparison of both classes of methods as well as for hybrid schemes mixing decisional tools specific for each class.
Źródło:
Journal of Telecommunications and Information Technology; 2003, 3; 9-15
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A method for reserve determination of the static and dynamic list of liquefied natural gas carriers and its application to the dynamic under keel clearance system in the outer port in Świnoujście
Autorzy:
Drwięga, K.
Gucma, L.
Gralak, R.
Powiązania:
https://bibliotekanauki.pl/articles/135146.pdf
Data publikacji:
2016
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
dynamic UKC
simulation methods
analytical methods
list
pressure transmitters
LNG carrier
Opis:
This paper presents a methodology for determining the components related to the heel of liquefied natural gas (LNG) carriers, excluding the heel of the vessel due to waves. The described method was applied to the description of under keel clearance of vessels approaching the outer port of Świnoujście. The method includes the determination of heel components caused by: draught reading errors, wind, current, tugboats and vessel maneuvers. Determination of the last component was carried out using a 2-stage method. In the first stage, simulation methods were used to identify the parameters of ship movement. In the second stage, the maximum heel of LNG carriers was calculated by analytical methods.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2016, 47 (119); 66-73
1733-8670
2392-0378
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
High-order long-step methods for solving semidefinite linear complementarity problems
Autorzy:
Preiss, M.
Stoer, J.
Powiązania:
https://bibliotekanauki.pl/articles/1839179.pdf
Data publikacji:
2003
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
semidefinite linear complementarity problems
infeasible-interior-point methods
long-step methods
Opis:
The authors studied in Preiss and Stoer (2003) the analyticity properties of infeasible-interior-point paths encountered in the context of semidefinite linear complementarity problems. It will be shown that these results allow for the design of infeasible-interior-point methods of long-step type with an arbitrarily high order of local convergence for solving such problems.
Źródło:
Control and Cybernetics; 2003, 32, 3; 659-670
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Résumé on Interval Runge-Kutta Methods
Autorzy:
Marciniak, Andrzej
Powiązania:
https://bibliotekanauki.pl/articles/748753.pdf
Data publikacji:
2012
Wydawca:
Polskie Towarzystwo Matematyczne
Tematy:
interval methods for ODEs, Runge-Kutta methods, floating-point interval arithmetic
Opis:
W artykule przedstawiono jawne i niejawne metody przedziałowe typu Rungego-Kutty. Metody takie zawierają w sobie błędy metod, co oznacza, że ten rodzaj błędów jest uwzględniony w otrzymywanych rozwiązaniach przedziałowych. Stosując te metody do rozwiązywania zagadnienia początkowego w zmiennopozycyjnej arytmetyce przedziałowej otrzymujemy zatem rozwiłzania w postaci przedziałów, które zawierają wszystkie możliwe błędy numeryczne. W artykule przedstawiono także przykłady numeryczne.
The paper presents explicit and implicit interval methods of Runge-Kutta type. Such methods introduce the errors of methods. It means that this kind of errors are included in the interval solutions obtained. Applying these methods for solving the initial value problem in floating-point interval arithmetic we can obtain solutions in the form of intervals which contain all possible numerical errors. Numerical examples are presented.
Źródło:
Mathematica Applicanda; 2012, 40, 1
1730-2668
2299-4009
Pojawia się w:
Mathematica Applicanda
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical methods of solving equations of hydrodynamics from perspectives of the code FLASH
Autorzy:
Murawski, K.
Lee, D.
Powiązania:
https://bibliotekanauki.pl/articles/202336.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
numerical methods for hyperbolic equations
finite volume method
Godunov-type methods
Opis:
In this paper we review numerical methods for hydrodynamic equations. Internal complexity make numerical solutions of these equations a formidable task. We present results of advanced numerical simulations for a complex system with a use of a publicly available code, FLASH. These results proof that the numerical methods cope very well with this task.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2011, 59, 1; 81-91
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Expert study. Analysis and synthesis of features derived from the expert experiment
Autorzy:
Sopilnyk, Lyubomyr
Powiązania:
https://bibliotekanauki.pl/articles/1878648.pdf
Data publikacji:
2014
Wydawca:
Wyższa Szkoła Bezpieczeństwa Publicznego i Indywidualnego Apeiron w Krakowie
Tematy:
Expert study
researches
methods
Źródło:
Security Dimensions; 2014, 11(11); 229-231
2353-7000
Pojawia się w:
Security Dimensions
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Methods of financial standing assessmentof building enterprises
Autorzy:
Kitowski, Jerzy
Powiązania:
https://bibliotekanauki.pl/articles/950951.pdf
Data publikacji:
2013
Wydawca:
Wydawnictwo Uniwersytetu Ekonomicznego we Wrocławiu
Tematy:
financial condition
methods
construction
Opis:
From a methodological point of view, the need to consider, in the synthetic methods, the assessment of enterprise’s financial standing, the criterion of the industrial specific features of the analyzed company and the changing economic conditions of its operation seems to be important . In this paper, an attempt has been made to present assumptions of few discriminatory, logit and banking methods to assess the financial standing of companies belonging to the building sector, taking into account the specifics of the industry. Critical reference has been made to numerous cases of simplifications and methodological errors that occur in the national literature on the subject.
Źródło:
Financial Sciences. Nauki o Finansach; 2013, 4 (17); 71-80
2080-5993
2449-9811
Pojawia się w:
Financial Sciences. Nauki o Finansach
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Kilka uwag na temat miejsca badań ilościowych w polskiej historii gospodarczej. Stan i perspektywy
Autorzy:
Matera, Rafał
Powiązania:
https://bibliotekanauki.pl/articles/603309.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Instytut Historii im. Tadeusza Manteuffla PAN w Warszawie
Tematy:
quantitative methods
economic history
Opis:
Some remarks on the place of quantitative research in Polish economic history. The state and prospects (Summary)The article is a polemic on the text by Piotr Guzowski and Radosław Poniat entitled: The place of quantitative research in modern Polish historiography, which appeared in 2013 in the 73 volume of Roczniki Dziejów Społecznych i Gospodarczych [The Yearbook of Social and Economic History]. The article refers to a number of hypotheses and opinions presented by scholars who offered a critical analysis of the state of Polish economic history, the methods it uses and the scholarly potential it has. The article aims to present dilemmas faced by scholars specializing in economic history – one which rests on two pillars: history and economy. The author posits that economic history (not only in Poland), in exploring new ways of development, continues to rely both on a traditional history, known for its adherence to idiographic methods (which does not rule out the selection and juxtaposition of different data), and on contemporary economics, concerned mainly with model-building. The author argues for adopting a methodologically open approach to economic history, discussing a number of significant, both western and Polish, publications on this issue. The article also contains a review of the use of quantitative methods in Polish economic history.
Źródło:
Roczniki Dziejów Społecznych i Gospodarczych; 2015, 75
0080-3634
Pojawia się w:
Roczniki Dziejów Społecznych i Gospodarczych
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
TERAPIE WSPOMAGAJĄCE ROZWÓJ DZIECI Z AUTYZMEM
THERAPIES TO SUPPORT THE DEVELOPMENT OF CHILDREN WITH AUTISM
Autorzy:
WOLSKA-DŁUGOSZ, MAŁGORZATA
PŁUSA, ANETA
Powiązania:
https://bibliotekanauki.pl/articles/460497.pdf
Data publikacji:
2018
Wydawca:
Państwowa Wyższa Szkoła Zawodowa w Chełmie
Tematy:
autism
symptoms
therapy
methods  
Opis:
The word autism increasingly appears on the lips of most pedagogues, teachers and parents. Why? This disorder is more and more common today in our environment: at school, in the family. The causes of this disease are not well known yet, but there are more and more methods and ways or means of treatment that allow the child with autism to "function as normal" in the society. It is very important to diagnose and start treatment as soon as it is possible. The following article introduces the theoretical aspects of this disorder, such as the concept or symptoms, which have been thoroughly discussed and summarized in a table form.In this article have been described only some of the possible ways to work with autistic children, such as behavioral therapy, Option Method, Activity Plans, sensory integration method. Each of these methods largely supports the development of a child with autism. The article ends with a summary and the conclusion of the theoretical study.
Źródło:
Scientific Bulletin of Chełm - Section of Pedagogy; 2018, 2; 95-110
2084-6770
Pojawia się w:
Scientific Bulletin of Chełm - Section of Pedagogy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The implementation of cooperative methods in higher education
Autorzy:
CZINEGE, Monika
Powiązania:
https://bibliotekanauki.pl/articles/455898.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Rzeszowski
Tematy:
higher education,
cooperative methods
Opis:
The general problems of the Hungarian education system surface in the higher education sphere as well. Instructors frequently note the knowledge, skill, and competence-related deficien-cies of newly enrolled students. Additional difficulties are posed by the lack of motivation or the low level of interest toward learning. Furthermore, the prevalence of traditional educational meth-ods, the lectures designed for a large student audience and similarly structured seminars tend to exacerbate the problem. Students do not prepare for classes or strive to increase their knowledge via independent work and active in-class participation. Consequently new methods are needed for increasing the efficiency of the educational process, along with the enhancement of internal moti-vation and the promotion of subject-related interest.
Źródło:
Edukacja-Technika-Informatyka; 2016, 7, 1; 249-257
2080-9069
Pojawia się w:
Edukacja-Technika-Informatyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Struktura retoryczna Psalmu 77 i jego interpretacja
The Rhetorical Structure of Psalm 77 and its Interpretation
Autorzy:
Mrozek, Kinga
Powiązania:
https://bibliotekanauki.pl/articles/607475.pdf
Data publikacji:
2007-12-01
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
synchronic methods
Ps 77
Opis:
The article presents an analysis of one of the Psalms of Asaph - Ps 77. The main purpose of the study is to show the dependence between the structure of the text and its interpretation, the impact of text division on ascertaining its message. With this aim in view different propositions of exegetes are set forth, their standpoints falling into two groups. On the one hand they divide Ps 77 according to the following criteria: the ‘selah’ pause or the generic features of the text - this approach results in demonstrating the nonuniformity of Ps 77. On the other hand, some exegetes claim that the analyzed text contains features that allow us to consider it as a uniform whole. The division of Ps 77 proposed in the article is based firstly on formal criteria and secondly on content criteria. Finally, a synthesis of both types of division is achieved and serves as a basis of interpretation. In this way it becomes possible to show: the dynamism of the content of Ps 77, its major themes, its reflective character, the image of a gracious but at the same time also mighty God, and the parenthetical features of the psalm.
Źródło:
Poznańskie Studia Teologiczne; 2007, 24; 101-120
0209-3472
Pojawia się w:
Poznańskie Studia Teologiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Methods of controller synthesis using linear matrix inequalities and model predictive control
Autorzy:
Miller, A.
Rybczak, M.
Powiązania:
https://bibliotekanauki.pl/articles/135474.pdf
Data publikacji:
2015
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
controller synthesis
LMI
MPC
predictive controller
controller synthesis methods
optimization methods
Opis:
Controllers based on linear matrix inequalities (LMI) and model predictive control (MPC) both use optimization methods; there are however significant differences between them. In case of LMI controllers, optimization is carried out during controller synthesis, because LMI’s are an optimization tool that requires a linear programming problem being solved. With MPC controllers, however, optimization methods are not used as much in controller synthesis as in controller algorithm operation, to determine optimal control signal values based on the found minimum of the criteria function. A square function is used with boundaries from above and below, which requires a square programming problem, with boundaries for decision variables, being solved. In this paper controller synthesis methods using LMI and MPC are shown, with a focus on the steps that need to be performed, and a comparison of both methods.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2015, 43 (115); 22-28
1733-8670
2392-0378
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Method for Reserve Determination of Static and Dynamic List of Bulk Carriers Applied to the Dynamic Under Keel Clearance System in the Port of Świnoujście
Autorzy:
Drwięga, K.
Gucma, L.
Gralak, R.
Powiązania:
https://bibliotekanauki.pl/articles/1203872.pdf
Data publikacji:
2017
Wydawca:
Polskie Forum Nawigacyjne
Tematy:
bulk carrier
dynamic UKC
simulation methods
analytical methods
heel
pressure transmitters
Opis:
The paper presents the methodology for determining the components which are related to heel of bulk carrier with one component excluded - the heel of vessel due to waves. The described method was applied to the system, which is dedicated to use in determination of UKC of vessels at the approach to the Port of Swinoujscie. The method includes determination of heel caused by: draught reading errors, wind, current, tugboats and heel related to vessel maneuvers. To determine heel related to vessel maneuver 2-stage method was carried out. The first stage simulation was used to identify the parameters of ship movement. At the second stage, the maximum heel of Bulk Carrier were calculated by using analytical methods. Presented method was implemented to the item rating under keel clearance at the approach to the Port of Swinoujscie.
W artykule przedstawiono metodykę określania składników związanych z przechyłem Capesize masowca, nie uwzględniając przechyłu od falowania. W metodzie zawarto określenie składowych przechyłu od błędów odczytu zanurzenia jednostki, działania wiatru, prądu, holowników oraz przechyłu związanego z manewrami jednostki. Ostatnia składowa została określona za pomocą metody dwuetapowej. Na etapie pierwszym za pomocą metod symulacyjnych określono parametry ruchu jednostki. Następnie z użyciem metod analitycznych określono maksymalne przechyły masowca. Przedstawioną metodę zaimplementowano do systemu oceny zapasu wody pod stępką na akwenie podejściowym do Portu w Świnoujściu.
Źródło:
Annual of Navigation; 2017, 24; 89-102
1640-8632
Pojawia się w:
Annual of Navigation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Energy characteristics of asynchronous electric drive
Autorzy:
German-Galkin, Sergiej
Sakharov, Vladimir
Tarnapowicz, Dariusz
Powiązania:
https://bibliotekanauki.pl/articles/409690.pdf
Data publikacji:
2019
Wydawca:
STE GROUP
Tematy:
energy characteristics
asynchronous electric drive
scalar control methods
vector control methods
Opis:
Energy aspects are fundamental to the design of electric drive systems. This article describes energy performance for asynchronous electric drives based on various control methods. These electric drives comparison shows that vector control methods have a significant advantage over scalar control methods. The asynchronous electric drive mathematical description is based on vector control theory and main component method. Equations, obtained by mathematical description, allow calculating of the currents, voltages and electric power at the output when the electromagnetic torque and speed machine are set. Energy characteristics of the asynchronous drive were obtained with the use of the MATLAB-SIMULINK simulation program.
Źródło:
Management Systems in Production Engineering; 2019, 1 (27); s. 51-54
2299-0461
Pojawia się w:
Management Systems in Production Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The projective-Newton methods
Autorzy:
Hobot, Grażyna
Pokora, Teresa
Powiązania:
https://bibliotekanauki.pl/articles/748356.pdf
Data publikacji:
1986
Wydawca:
Polskie Towarzystwo Matematyczne
Tematy:
Finite elements, Rayleigh-Ritz and Galerkin methods, finite methods
Single equations
Opis:
.
In this paper we consider the Newton-like methods for the solution of nonlinear equations. In each step of the Newton method the linear equations are solved approximatively by a projection method. We call this a projective-Newton method. We investigate the convergence and the order of convergence for these methods. Next, the projective-Newton methods in the finite element space are applied for nonlinear elliptic boundary value problems. In this case the linear equations of the Newton method are solved by the Ritz method.
Źródło:
Mathematica Applicanda; 1986, 14, 27
1730-2668
2299-4009
Pojawia się w:
Mathematica Applicanda
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Addressing research design problem in mixed methods research
Problem projektowania badań naukowych w metodach mieszanych
Autorzy:
Alavi, H.
Hąbek, P.
Powiązania:
https://bibliotekanauki.pl/articles/409858.pdf
Data publikacji:
2016
Wydawca:
STE GROUP
Tematy:
research design
quantitative research methods
qualitative research methods
mixed research methods
projektowanie badań
metody ilościowe
metody jakościowe
metody mieszane
Opis:
Alongside other disciplines in social sciences, management researchers use mixed methods research more and more in conduct of their scientific investigations. Mixed methods approach can also be used in the field of production engineering. In comparison with traditional quantitative and qualitative research methods, reasons behind increasing popularity of mixed research method in management science can be traced in different factors. First of all, any particular discipline in management can be theoretically related to it. Second is that concurrent approach of mixed research method to inductive and deductive research logic provides researchers with opportunity to generate theory and test hypothesis in one study simultaneously. In addition, it provides a better justification for chosen method of investigation and higher validity for obtained answers to research questions. Despite increasing popularity of mixed research methods among management scholars, there is still need for a comprehensive approach to research design typology and process in mixed research method from the perspective of management science. The authors in this paper try to explain fundamental principles of mixed research method, its typology and different steps in its design process.
Obok innych dyscyplin w naukach społecznych, również w dyscyplinie nauk o zarządzaniu naukowcy coraz częściej korzystają z metod mieszanych w prowadzeniu swoich badań naukowych. Metody mieszane mogę również znaleźć zastosowanie w badaniach z zakresu inżynierii produkcji. W porównaniu z tradycyjnymi ilościowymi i jakościowymi metodami badawczymi, przyczyn zwiększającej się popularności mieszanych metod badawczych w naukach o zarządzaniu jest wiele. Po pierwsze każdy obszar w zarządzaniu może być teoretycznie związany z nimi. Po drugie w mieszanych metodach badawczych jednoczesne podejście indukcyjne i dedukcyjne umożliwia naukowcom generowanie teorii oraz testowanie hipotez w jednym badaniu jednocześnie. Ponadto zapewnia lepsze uzasadnienie wyboru metody badawczej i wyższą wiarygodność uzyskanych odpowiedzi na pytania badawcze. Pomimo coraz większej popularności mieszanych metod badawczych, nadal istnieje potrzeba kompleksowego podejścia do projektowania procesu badawczego z punktu widzenia nauk o zarządzaniu. W niniejszym artykule autorzy starają się wyjaśnić podstawowe zasady leżące u podstaw metod mieszanych, ich typologii i różnych etapów w procesie ich projektowania.
Źródło:
Management Systems in Production Engineering; 2016, 1 (21); 62-66
2299-0461
Pojawia się w:
Management Systems in Production Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Przetwarzanie termogramów oraz obróbka danych w badaniach nieniszczących metodami termografii w podczerwieni
Thermograms and data processing in nondestructive testing by IR thermography methods
Autorzy:
Świderski, W.
Vavilov, V.
Powiązania:
https://bibliotekanauki.pl/articles/235148.pdf
Data publikacji:
2009
Wydawca:
Wojskowy Instytut Techniczny Uzbrojenia
Tematy:
badania termograficzne
thermographic methods
Opis:
W artykule przedstawiono metody stosowane w przetwarzaniu termogramów oraz obróbce danych służące w badaniach nieniszczących do poprawy zobrazowania poszukiwanych defektów w badanych obiektach. Stosowane są zarówno standardowe techniki, które powszechnie używa się przy obróbce obrazów, jak i techniki specjalne wykorzystywane z reguły przy analizie termogramów.
Thermogram and data processing methods used to correct presentations of defects detected in objects by nondestructive testing are presented in this paper. Standard techniques, which are generally used in image processing, as well as special techniques used mainly in thermogram analysis are presented too.
Źródło:
Problemy Techniki Uzbrojenia; 2009, R. 38, z. 111; 57-81
1230-3801
Pojawia się w:
Problemy Techniki Uzbrojenia
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-50 z 3361

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