Temat: first approximation - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Analogia w fizyce
Analogy in Physics
Autorzy:: Piersa, Henryk
Powiązania:: https://bibliotekanauki.pl/articles/2012846.pdf
Data publikacji:: 2011
Wydawca:: Katolicki Uniwersytet Lubelski Jana Pawła II. Towarzystwo Naukowe KUL
Tematy:: optyka geometryczna
promień świetlny
współczynnik załamania
geometryczna optyka elektronowa
zasada Fermata
zasada Hamiltona
pierwsze przybliżenie lub optyka Gaussa
drugie przybliżenie
aberracja
pole elektryczne
potencjał elektryczny
potencjał prędkości
elektryczna linia sił
linia prądu
płyn doskonały
ruch w dwu wymiarach
syntaktyka
prawo
geometrical optics
light ray
index of refraction
geometrical optics of electrons
Fermat’s principles
Hamilton’s principles
first-order approximation or Gaussian optics
second-order approximation
aberration
electric field
electric potential
velocity potential
electric line of forces
stream line
perfect liquid
motion in two dimensions
syntactics
law
Opis:: Based upon the example of geometrical optics and geometrical optics of electrons, as well as the theory of the electric field and the theory of the flow of the perfect liquid in two dimensions, the analogy of the laws of physics have been discussed. In the awareness of physicists, the analogy is a syntactical identity, of the physically interpreted mathematical formulas, describing the laws of physics. In the paper, it has been presented some relevant laws of the two pairs of the theories being compared. For the three cases, it has been provided the appropriate photographs presenting the results of the empirical tests of some of the relevant laws.
Źródło:: Roczniki Filozoficzne; 2011, 59, 2; 239-256
0035-7685
Pojawia się w:: Roczniki Filozoficzne
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Dynamic balance research of protected systems
Autorzy:: Naumeyko, I.
Alja'afreh, M.
Powiązania:: https://bibliotekanauki.pl/articles/411213.pdf
Data publikacji:: 2015
Wydawca:: Polska Akademia Nauk. Oddział w Lublinie PAN
Tematy:: Non-linear system
singular points
eigenvalues
asymptotic behavior
first approximation
linearization
Opis:: The dynamic models of the complex ergatic objects' behavior, presented in the form of differentia equations and their systems were studied. The stability and other properties are researched. The methods of analysis and reduce of harmful factors and their impact on people were theoretically proved. The methods of analysis and critical points removal in dynamic models of hazards distribution are offered. The object of study is the system of the harmful external factors protection. Subject of research is the system of two nonlinear differential equations as a model of technical systems with protection. The object of protection is described by logistic equation. and defense system - by non-linear differential equation with a security functions of rather general form. This paper describes critical modes analysis and stationary states’ stability of protected systems with harmful influences. Numerical solution of general problem and also the analytical solution for the case of fixed expected harmful effects have been obtained. Various types of general models for "Man-machine-environment" systems were studied. Each of describes some kind of the practically important quality of object in an appropriate way. And All together they describe the object in terms of it’s safe operation. Their further detailing process results to either well-known, or some new subsystems’ models. Systems with "fast" protection at a relatively slow dynamics of the object were studied. This leads to the models with small parameter and asymptotic solutions of differentia equations. Some estimates for protection cost in different price-functional and for different functions in the right part of equation, which describes the dynamics of defense were obtained. For calculations, analysis and graphical representations some of mathematical packages was applied.
Źródło:: ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes; 2015, 4, 3; 85-90
2084-5715
Pojawia się w:: ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Axisymmetric free vibration of layered cylindrical shell filled with fluid
Autorzy:: Izyan, M. D. Nurul
Sabri, Nur Ain Ayunni
Hafizah, A. K. Nor
Sankar, D. S.
Viswanathan, K. K.
Powiązania:: https://bibliotekanauki.pl/articles/2106463.pdf
Data publikacji:: 2021
Wydawca:: Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:: drgania swobodne
powłoka cylindryczna
efekt Love'a
axisymmetric
free vibration
cylindrical shell
Love’s first approximation theory
inviscid fluid
spline approximation
eigenvalues
Opis:: The aim of the study is to analyse the axisymmetric free vibration of layered cylindrical shells filled with a quiescent fluid. The fluid is assumed to be incompressible and inviscid. The equations of axisymmetric vibrations of layered cylindrical shell filled with fluid, on the longitudinal and transverse displacement components are obtained using Love’s first approximation theory. The solutions of displacement functions are assumed in a separable form to obtain a system of coupled differential equations in terms of displacement functions. The displacement functions are approximated by Bickley-type splines. A generalized eigenvalue problem is obtained and solved numerically for a frequency parameter and an associated eigenvector of spline coefficients. Two layered shells with three different types of materials under clamped-clamped boundary conditions are considered. Parametric studies are made on the variation of the frequency parameter with respect to length-to-radius ratio and length-to-thickness ratio.
Źródło:: International Journal of Applied Mechanics and Engineering; 2021, 26, 4; 63--76
1734-4492
2353-9003
Pojawia się w:: International Journal of Applied Mechanics and Engineering
Dostawca treści:: Biblioteka Nauki

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