Results 81 to 90 of about 24,624 (181)

Oscillatory dynamics in a model of vascular tumour growth - implications for chemotherapy

Biology Direct, 2010
Background Investigations of solid tumours suggest that vessel occlusion may occur when increased pressure from the tumour mass is exerted on the vessel walls. Since immature vessels are frequently found in tumours and may be particularly sensitive, such
Maini PK, Owen MR, Stamper IJ, Byrne HM
doaj   +1 more source

PDE admitting Lagrangian solutions with nontrivial homotopy invariants (π-degree, polarization index, maslov period)

Journal of Differential Equations, 1991
The author considers four qualitative invariants for Lagrangian cylinders ([\(\theta\)]-period, \(\pi\)-degree, polarization index and Maslov period) and shows that for specific classes of first and second order periodic differential equations in the plane there exist solution Lagrangian cylinders whose invariants are not trivial.
openaire   +1 more source

Pressure swing adsorption process modeling using physics-informed machine learning with transfer learning and labeled data

Green Chemical Engineering
Pressure swing adsorption (PSA) modeling remains a challenging task since it exhibits strong dynamic and cyclic behavior. This study presents a systematic physics-informed machine learning method that integrates transfer learning and labeled data to ...
Zhiqiang Wu, Yunquan Chen, Bingjian Zhang, Jingzheng Ren, Qinglin Chen, Huan Wang, Chang He   +6 more
doaj   +1 more source

From integral manifolds and metrics to potential maps

Atti della Accademia Peloritana dei Pericolanti : Classe di Scienze Fisiche, Matematiche e Naturali, 2004
Our paper contains two main results: (1) the integral manifolds of a distribution together with two Riemann metrics produce potential maps which are in fact least squares approximations of the starting integral manifolds; (2) the least squares energy ...
Udriste, C
doaj   +1 more source

Precise soliton solutions of the Landau-Ginzburg-Higgs equation via the Sardar sub-equation method

Discover Applied Sciences
In the realm of nonlinear mathematical physics, the Landau-Ginzburg-Higgs (LGH) equation stands as a pivotal model for understanding complex physical phenomena, including superconductors, phase transitions, and particle interactions.
Ahmed Refaie Ali, Md. Nur Alam, Md. Fayz-Al-Asad, Mujahid Iqbal, Mohammad Hassan   +4 more
doaj   +1 more source

On simulations of 3D fractional WBBM model through mathematical and graphical analysis with the assists of fractionality and unrestricted parameters

Scientific Reports
This study retrieves some novel exact solutions to the family of 3D space–time fractional Wazwaz–Benjamin–Bona–Mahony (WBBM) equations in the context of diverse nonlinear physical phenomena resulting from water wave mechanics.
Nur Hasan Mahmud Shahen, Foyjonnesa, Md. Al Amin, M. M. Rahman   +3 more
doaj   +1 more source

A Local Strong form Meshless Method for Solving 2D time-Dependent Schrödinger Equations

پژوهش‌های ریاضی, 2018
This paper deals with the numerical solutions of the 2D time dependent Schr¨odinger equations by using a local strong form meshless method. The time variable is discretized by a finite difference scheme. Then, in the resultant elliptic type PDEs, special
Fariba Takhtabnoos, Ahmad Shirzadi
doaj  

Nonmetric geometric flows and quasicrystalline topological phases for dark energy and dark matter in $$f(Q)$$ f ( Q ) cosmology

European Physical Journal C: Particles and Fields
We elaborate on nonmetric geometric flow theory and metric-affine gravity with applications in modern cosmology. Two main motivations for our research follow from the facts that (1) cosmological models for f(Q) modified gravity theories, MGTs, are ...
Laurenţiu Bubuianu, Erik Nurlan, Julia O. Seti, Sergiu I. Vacaru, Elşen Veli Veliev   +4 more
doaj   +1 more source

Numerical solution of PDEs in periodical domains

, 2018
We present in this work two schemes of approximation for numerical solutions of PDEs. The first one is the maximum entropy method (max-ent) and the second one is the b-spline method. These methods let us impose a special kind of boundary conditions: periodic boundary conditions for unbounded domains.
openaire   +1 more source

Time-periodic solutions of Hamiltonian PDEs using pseudoholomorphic curves

, 2019
Oliver Fabert, Niek Lamoree
openalex   +1 more source