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Wyszukujesz frazę "methods" wg kryterium: Wszystkie pola


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:
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:
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:
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:
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:
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:
Methods for Different Orders Stresses Estimation with Diffraction Methods
Autorzy:
Gadalińska, E.
Powiązania:
https://bibliotekanauki.pl/articles/97851.pdf
Data publikacji:
2017
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Lotnictwa
Tematy:
stress
diffraction methods for stress estimation
orders of stresses
Opis:
The publication describes how diffraction methods and mathematical bases can be used for measurement of various types of stresses in single-phase and multiphase materials. Firstly, the paper defines the stresses and classifies them from the scale of their interactions point of view. Subsequently, the phenomenon of radiation diffraction on the crystalline lattice is presented including formulas describing this phenomenon and the dependencies enabling stress measurements. The key part of the paper is the description of one of the second order stress estimation methods based on diffraction data and a selfconsistent model.
Źródło:
Fatigue of Aircraft Structures; 2017, 9; 39-54
2081-7738
2300-7591
Pojawia się w:
Fatigue of Aircraft Structures
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Generalized Newton and NCP-methods: convergence, regularity, actions
Autorzy:
Kummer, Bernd
Powiązania:
https://bibliotekanauki.pl/articles/729371.pdf
Data publikacji:
2000
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
nonsmooth functions
generalized Newton methods
critical points
complementarity
SQP methods
inverse mappings
regularity
Opis:
Solutions of several problems can be modelled as solutions of nonsmooth equations. Then, Newton-type methods for solving such equations induce particular iteration steps (actions) and regularity requirements in the original problems. We study these actions and requirements for nonlinear complementarity problems (NCP's) and Karush-Kuhn-Tucker systems (KKT) of optimization models. We demonstrate their dependence on the applied Newton techniques and the corresponding reformulations. In this way, connections to SQP-methods, to penalty-barrier methods and to general properties of so-called NCP-functions are shown. Moreover, direct comparisons of the hypotheses and actions in terms of the original problems become possible. Besides, we point out the possibilities and bounds of such methods in dependence of smoothness.
Źródło:
Discussiones Mathematicae, Differential Inclusions, Control and Optimization; 2000, 20, 2; 209-244
1509-9407
Pojawia się w:
Discussiones Mathematicae, Differential Inclusions, Control and Optimization
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:
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:
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:
Stochastic approximation. I. Optimization methods without constraints
Autorzy:
Koronacki, Jacek
Powiązania:
https://bibliotekanauki.pl/articles/747471.pdf
Data publikacji:
1977
Wydawca:
Polskie Towarzystwo Matematyczne
Tematy:
Stochastic approximation,Sequential methods,Statistics
Opis:
.
This is a critical review of recent results in stochastic approximation methods for optimization problems. Part I deals with unconstrained optimization, with special emphasis on the problem of choice of the direction and the length of iteration steps.
Źródło:
Mathematica Applicanda; 1977, 5, 11
1730-2668
2299-4009
Pojawia się w:
Mathematica Applicanda
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Stochastic approximation. II. Optimization methods with constraints
Autorzy:
Koronacki, Jacek
Powiązania:
https://bibliotekanauki.pl/articles/747475.pdf
Data publikacji:
1977
Wydawca:
Polskie Towarzystwo Matematyczne
Tematy:
Stochastic approximation,Sequential methods,Statistics
Opis:
.
This is a critical review of recent results in stochastic approximation methods for optimization problems. Part II deals with constrained optimization; here, the stochastic variants of the penalty function method, the method of feasible directions and the method of Lagrange functions are discussed.
Źródło:
Mathematica Applicanda; 1977, 5, 11
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

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