Results 151 to 160 of about 5,889,360 (355)

Eigenvalue Localization for Symmetric Positive Toeplitz Matrices

Axioms
Given a real symmetric matrix, several inclusion and exclusion intervals containing its eigenvalues can be given. In this paper, for symmetric positive Toeplitz matrices, we provide an inclusion interval and, under an additional hypothesis, we also give ...
Juan M. Peña
doaj   +1 more source

Vulnerability in processing definiteness: The case of heritage Turkish. [PDF]

Front Psychol, 2023
Uygun S.
europepmc   +1 more source

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

Some theorems on the Fourier analysis of positive definite functions [PDF]

, 1965
Leopold Schmetterer
openalex   +2 more sources

Positive definiteness of paired symmetric tensors and elasticity tensors [PDF]

Journal of Computational and Applied Mathematics, 2017
Zhenghai Huang, L. Qi
semanticscholar   +1 more source

Promotion of 5‐hydroxymethylfurfural synthesis from glucose over AlCl3 catalyst with choline chloride

AIChE Journal, EarlyView.
Abstract Efficient production of 5‐hydroxymethylfurfural (HMF) from glucose was achieved in a water‐methyl isobutyl ketone biphasic solvent system over AlCl3 catalyst, using a green and cheap choline chloride (ChCl) salt as a promoter. An optimized HMF yield of 67% was obtained from 0.6 M glucose over 0.06 M AlCl3 with 3.8 M ChCl addition at 140°C ...
Chencong Ruan, Hero Jan Heeres, Jun Yue
wiley   +1 more source

On positive definite distributions

, 2020
We provide necessary and sufficient conditions for a tempered distribution $F\in S'(R)$ to be positive definite. A generalized Cauchy transform $\widetilde{F}$ of $F$ is used as a numerical continuation of $F$ to the open upper and lower complex half-planes in $C$.
openaire   +2 more sources

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

Functions positive definite in 𝐶[0,1] [PDF]

, 1969
S J Einhorn
openalex   +1 more source

Riemannian Geometry for the Classification of Brain States with Intracortical Brain Recordings

Advanced Intelligent Systems, EarlyView.
Geometric machine learning is applied to decode brain states from invasive intracortical neural recordings, extending Riemannian methods to the invasive regime where data is scarcer and less stationary. A Minimum Distance to Mean classifier on covariance manifolds uses geodesic distances to outperform convolutional neural networks while reducing ...
Arnau Marin‐Llobet, Sergio Sánchez‐Manso, Arnau Manasanch, Lluc Tresserras, Xinhe Zhang, Yining Hua, Hao Zhao, Melody Torao‐Angosto, Maria V Sanchez‐Vives, Leonardo Dalla Porta   +9 more
wiley   +1 more source