Results 81 to 90 of about 554,064 (360)

Strictly Hermitian Positive Definite Functions

, 2004
Let H be any complex inner product space with inner product . We say that f : C -->C is Hermitian positive definite on H if the matrix $$(f())_{r,s=1}^n \eqno(*)$$ is Hermitian positive definite for all choice of z^1,...,z^n in H, all n.
Pinkus, Allan
core   +4 more sources

Globotriaosylceramide Gb3 Influences Wound Healing and Scar Formation by Orchestrating Fibroblast Heterogeneity

Advanced Science, EarlyView.
In superficial second‐degree burn wounds, Gb3 turns on genes related to papillary cells through the FGF2 signaling pathway. This increases the ability of cells to break down fibrin and decreases fibrosis, which ultimately prevents scar formation in burn injuries.
Sujie Xie, Runzhi Huang, Weijin Qian, Xinran Ding, Wei Zhang, Yixu Li, Jianyu Lu, Hanlin Sun, Yifan Liu, Yuntao Yao, Bingnan Lu, Minjuan Wu, Zhaofan Xia, Shizhao Ji   +13 more
wiley   +1 more source

Positive definite collections of disks

, 2006
Let $Q(z,w)=-\prod_{k=1}^n [(z-a_k)(\bar{w}-\bar{a}_k)-R_k^2]$. M. Putinar and B. Gustafsson proved recently that the matrix $Q(a_i,a_j)$, $1\leq i,j\leq n$, is positive definite if disks $|z-a_i|
Tkachev, Vladimir
core   +1 more source

Advancing Direct Alcohol Fuel Cells: Innovations in Composite‐Based Electrocatalysts and Polymer Support Materials for Enhanced Efficiency

Advanced Energy and Sustainability Research, EarlyView.
This graphical abstract emphasizes the working principle and the various essential factors of the direct methanol fuel cell (DMFCs). Additionally, various parameters, such as the nanoparticle's size and shape, the nature of the electrolyte, the type of support materials, and their fabrication process, also play essential roles in the functioning of the
Kirti Mishra, Samarjeet Singh Siwal, Phil Hart, Vijay Kumar Thakur   +3 more
wiley   +1 more source

Organic‐Inorganic Photosynthetic Interfaces Built on Intertwined WO3 Nanosheets for Enhanced HBr/H2O Photoanodic Oxidations

Advanced Energy and Sustainability Research, EarlyView.
Three‐dimensional WO3 nanosheets (3D‐NS) with exposed {001} facets are grown in situ, forming a highly interconnected 3D architecture, which is sensitized with a polymeric perylene bisimide layer and test for HBr photooxidation. The self‐assembly of a quantasome architecture—based on perylene bisimide dyes, templated around a tetra‐ruthenated ...
Jintao Liu, Ilaria Crea, Thomas Gobbato, Francesco Rigodanza, Gian Andrea Rizzi, Elisabetta Benazzi, Marcella Bonchio   +6 more
wiley   +1 more source

On the matrix square root via geometric optimization

, 2015
This paper is triggered by the preprint "\emph{Computing Matrix Squareroot via Non Convex Local Search}" by Jain et al. (\textit{\textcolor{blue}{arXiv:1507.05854}}), which analyzes gradient-descent for computing the square root of a positive definite ...
Sra, Suvrit
core   +2 more sources

Highly Photoluminescent RGB‐Carbon Dots and Their Integration Applications in Light‐Emitting Diodes and Luminescent Solar Concentrators

Aggregate, EarlyView.
Through precise molar ratio control of o‐phenylenediamine and phytic acid, we prepare tricolor carbon dots with high quantum yields. Their superior optical properties enable the development of tunable LEDs (3033–5493 K), luminescent solar concentrators, and an innovative self‐powered integrated photovoltaic system.
Bin Liu, Genghong Huang, Yaling Wang, Huijie Bai, Suping Jia, Fu‐de Ren, Xinghong Zhang   +6 more
wiley   +1 more source

An Inversion-Free Method for Finding Positive Definite Solution of a Rational Matrix Equation

The Scientific World Journal, 2014
A new iterative scheme has been constructed for finding minimal solution of a rational matrix equation of the form X+A*X-1A=I. The new method is inversion-free per computing step.
Fazlollah Soleymani, Mahdi Sharifi, Solat Karimi Vanani, Farhad Khaksar Haghani, Adem Kılıçman   +4 more
doaj   +1 more source

Positive Semidefiniteness and Positive Definiteness of a Linear Parametric Interval Matrix

, 2017
We consider a symmetric matrix, the entries of which depend linearly on some parameters. The domains of the parameters are compact real intervals. We investigate the problem of checking whether for each (or some) setting of the parameters, the matrix is ...
A Neumaier, A Skjäl, B Gärtner, CA Floudas, CD Meyer, D Hertz, ED Popova, ED Popova, ER Hansen, G Mayer, G Rex, H Leng, J Rohn, J Shao, L Jaulin, L Vandenberghe, LV Kolev, LV Kolev, LV Kolev, M Fiedler, M Hladík, M Hladík, M Hladík, M Mönnigmann, M Zimmer, MH Matcovschi, RB Kearfott, S Białas, S Poljak, SM Rump, Y Nesterov   +30 more
core   +1 more source

Robust Reinforcement Learning Control Framework for a Quadrotor Unmanned Aerial Vehicle Using Critic Neural Network

Advanced Intelligent Systems, Volume 7, Issue 3, March 2025.
Quadrotor unmanned aerial vehicle control is critical to maintain flight safety and efficiency, especially when facing external disturbances and model uncertainties. This article presents a robust reinforcement learning control scheme to deal with these challenges.
Yu Cai, Yefeng Yang, Tao Huang, Boyang Li   +3 more
wiley   +1 more source