Results 41 to 50 of about 486,149 (332)

DYNAMICAL MODE OF CASE STUDY ON MASS-SPRING SYSTEM ON A MASSLESS CART: COMPARED ANALYTICAL AND NUMERICAL SOLUTIONS [PDF]

open access: yesJournal of Mechanics of Continua and Mathematical Sciences
In this research, we study the dynamical behaviors of a mass-spring system on a massless moving cart. The Lagrangian of the system was first constructed, which resulted in obtaining the Euler-Lagrange equation (ELE) of the system.
Rabab Jarrar   +4 more
doaj   +1 more source

Transient Euler-Lagrange/DEM simulation of stent thrombosis

open access: yesCurrent Directions in Biomedical Engineering, 2016
Stent implantation is the treatment of choice for cardiovascular diseases. By introduction of biodegradable thick strut stents investigations of thrombosis formation is one focus of research.
Stiehm Michael   +3 more
doaj   +1 more source

The oscillator's model with broken symmetry

open access: yesVestnik Samarskogo Gosudarstvennogo Tehničeskogo Universiteta. Seriâ: Fiziko-Matematičeskie Nauki, 2015
The equations of the oscillator motion are considered. The exact solutions are given in the form of exponents with an additional parameter that characterizes the asymmetry of the oscillations.
Dmitry B Volov
doaj   +1 more source

Lagrangian Data Assimilation for Improving Model Estimates of Velocity Fields and Residual Currents in a Tidal Estuary

open access: yesApplied Sciences, 2021
Numerical models are associated with uncertainties that can be reduced through data assimilation (DA). Lower costs have driven a recent tendency to use Lagrangian instruments such as drifters and floats to obtain information about water bodies.
Neda Mardani   +5 more
doaj   +1 more source

Reformulation of QCD in the language of general relativity [PDF]

open access: yes, 1995
It is shown that there exists such collection of variables that the standard QCD Lagrangian can be represented as the sum of usual Palatini Lagrangian for Einstein general relativity and the Lagrangian of matter and some other fields where the tetrad ...
Lunev, F. A.
core   +3 more sources

Cyclic Lagrangian Submanifolds and Lagrangian Fibrations

open access: yesTokyo Journal of Mathematics, 2005
Recall that a symplectic manifold \((M,\omega)\) is called prequantizable if there exists a nonnegative number \(\gamma_\omega\) such that the period group \(\Gamma_\omega= \{[\omega](A)= \int_A \omega: A\in H_2(M,\mathbb{Z})\}\subset \mathbb{R}\) is of the form \(\Gamma_\omega= \gamma_\omega\cdot\mathbb{Z}\).
openaire   +3 more sources

Equation on the basis of one-dimensional chaotic dynamics

open access: yesVestnik Samarskogo Gosudarstvennogo Tehničeskogo Universiteta. Seriâ: Fiziko-Matematičeskie Nauki, 2013
Modified Klein–Gordon–Fock equations were obtained on the basis of one-dimensional chaotic dynamics and the original Lagrangians were found. The concepts of $m$-exponential map and groups with broken symmetry are introduced.
Dmitry Borisovich Volov
doaj   +1 more source

Lagrangians of Hypergraphs [PDF]

open access: yesCombinatorics, Probability and Computing, 2002
How large can the Lagrangian of an r-graph with m edges be? Frankl and Füredi [1] conjectured that the r-graph of size m formed by taking the first m sets in the colex ordering of N(r) has the largest Lagrangian of all r-graphs of size m. We prove the first ‘interesting’ case of this conjecture, namely that the 3-graph with (t3) edges and ...
openaire   +2 more sources

Engineering Deformation and Failure in Diamond Triply Periodic Minimal Surface Lattices via 3D Wall‐Thickness Grading

open access: yesAdvanced Engineering Materials, EarlyView.
The work demonstrates that strategic wall‐thickness grading in diamond triply periodic minimal surface lattices enables precise tuning of deformation and failure behavior under compression. Different gradation patterns guide how and where the structure collapses, improving energy absorption or promoting controlled brittle failure.
Giovanni Rizza   +3 more
wiley   +1 more source

Two-Dimensional Hydrodynamics as a Class of Special Hamiltonian Systems

open access: yesEast European Journal of Physics
The paper defines a class of Hamiltonian systems whose phase flows are exact solutions of the two-dimensional hydrodynamics of an incompressible fluid. The properties of this class are considered.
Kostyantyn M. Kulyk   +1 more
doaj   +1 more source

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