Results 11 to 20 of about 186 (128)

Halobacterium salinarum NRC-1 Sustains Voltage Production in a Dual-Chambered Closed Microbial Fuel Cell. [PDF]

ScientificWorldJournal, 2022
Sustained bioenergy production from organisms that thrive in high salinity, low oxygen, and low nutrition levels is useful in monitoring hypersaline polluted environments. Microbial fuel cell (MFC) studies utilizing single species halophiles under salt concentrations higher than 1 M and as a closed microbial system are limited.
Goncalves RO, Salehi A, Publico M, Nyende J, Nadarajah N, Ghoreyshi S, Shastri P.   +6 more
europepmc   +2 more sources

Slime-Groove Drag Reduction Characteristics and Mechanism of Marine Biomimetic Surface. [PDF]

Appl Bionics Biomech, 2022
With the development of science and technology, energy consumption and demand continue to increase, and energy conservation and consumption reduction have become the primary issue facing the world. Improving the energy efficiency of ships not only helps reduce fuel consumption but also reduces carbon dioxide emissions, which is an important guarantee ...
Yan M, Gu Y, Ma L, Tang J, He C, Zhang J, Mou J.   +6 more
europepmc   +2 more sources

Brain Connectivity Studies on Structure-Function Relationships: A Short Survey with an Emphasis on Machine Learning. [PDF]

Comput Intell Neurosci, 2021
This short survey reviews the recent literature on the relationship between the brain structure and its functional dynamics. Imaging techniques such as diffusion tensor imaging (DTI) make it possible to reconstruct axonal fiber tracks and describe the structural connectivity (SC) between brain regions.
Wein S, Deco G, Tomé AM, Goldhacker M, Malloni WM, Greenlee MW, Lang EW.   +6 more
europepmc   +2 more sources

Oscillatory Behaviour of a First-Order Neutral Differential Equation in relation to an Old Open Problem

International Journal of Mathematics and Mathematical Sciences, 2020
In this paper, we obtain sufficient conditions for oscillation and nonoscillation of the solutions of the neutral delay differential equation yt−∑j=1kpjtyrjt′+qtGygt−utHyht=ft, where pj and rj for each j and q,u,G,H,g,h, and f are all continuous ...
K. C. Panda, R. N. Rath, S. K. Rath
doaj   +2 more sources

PINN‐CDR: A Neural Network‐Based Simulation Tool for Convection‐Diffusion‐Reaction Systems

International Journal of Intelligent Systems, Volume 2023, Issue 1, 2023., 2023
In this paper, a discretization‐free approach based on the physics‐informed neural network (PINN) is proposed for solving the forward and inverse problems governed by the nonlinear convection‐diffusion‐reaction (CDR) systems. By embedding physical information described by the CDR system in the feedforward neural networks, PINN is trained to approximate
Qingzhi Hou, Honghan Du, Zewei Sun, Jianping Wang, Xiaojing Wang, Jianguo Wei, Alexander Hošovský   +6 more
wiley   +1 more source

Second‐order impulsive differential systems with mixed delays: Oscillation theorems

Mathematical Methods in the Applied Sciences, Volume 45, Issue 18, Page 12184-12195, December 2022., 2022
In this work, we obtain necessary and sufficient conditions for the oscillation of solutions of a second‐order neutral differential equation with impulses. Two examples are provided to show the effectiveness and feasibility of the main results. Our main tool is the Lebesgue's Dominated Convergence theorem.
Shyam Sundar Santra, Apurba Ghosh, Ioannis Dassios   +2 more
wiley   +1 more source

Large‐Eddy Simulations of a Convection Cloud Chamber: Sensitivity to Bin Microphysics and Advection

Journal of Advances in Modeling Earth Systems, Volume 14, Issue 5, May 2022., 2022
Abstract Bin microphysics schemes are useful tools for cloud simulations and are often considered to provide a benchmark for model intercomparison. However, they may experience issues with numerical diffusion, which are not well quantified, and the transport of hydrometeors depends on the choice of advection scheme, which can also change cloud ...
Fan Yang, Mikhail Ovchinnikov, Subin Thomas, Alexander Khain, Robert McGraw, Raymond A. Shaw, Andrew M. Vogelmann   +6 more
wiley   +1 more source

A convex function satisfying the Łojasiewicz inequality but failing the gradient conjecture both at zero and infinity

Bulletin of the London Mathematical Society, Volume 54, Issue 2, Page 590-608, April 2022., 2022
Abstract We construct an example of a smooth convex function on the plane with a strict minimum at zero, which is real analytic except at zero, for which Thom's gradient conjecture fails both at zero and infinity. More precisely, the gradient orbits of the function spiral around zero and at infinity.
Aris Daniilidis, Mounir Haddou, Olivier Ley   +2 more
wiley   +1 more source

Oscillation of Third‐Order Nonlinear Generalized Difference Equation with Multiple Neutral Terms

Mathematical Problems in Engineering, Volume 2022, Issue 1, 2022., 2022
In this paper, the authors discuss the oscillatory behaviour of a third order generalized difference equation with multiple neutral terms. We have also applied Riccati transformation and Philo type technique to derive new oscillation criteria for the difference equation in question. Suitable examples are provided to validate our main results.
M. Sumathy, P. Venkata Mohan Reddy, M. Maria Susai Manuel, M. Syed Ali, Leonid Shaikhet   +4 more
wiley   +1 more source

Fast and Efficient Numerical Finite Difference Method for Multiphase Image Segmentation

Mathematical Problems in Engineering, Volume 2021, Issue 1, 2021., 2021
We present a simple numerical solution algorithm for a gradient flow for the Modica–Mortola functional and numerically investigate its dynamics. The proposed numerical algorithm involves both the operator splitting and the explicit Euler methods. A time step formula is derived from the stability analysis, and the goodness of fit of transition width is ...
Yibao Li, Sungha Yoon, Jian Wang, Jintae Park, Sangkwon Kim, Chaeyoung Lee, Hyundong Kim, Junseok Kim, Akemi Gálvez   +8 more
wiley   +1 more source