Results 111 to 120 of about 26,900 (293)

Direct Measurement of the Singlet Lifetime and Photoexcitation Behavior of the Boron Vacancy Center in Hexagonal Boron Nitride

Advanced Optical Materials, EarlyView.
Negatively charged boron vacancy defects in hexagonal boron nitride promise near‐surface quantum sensing, but their internal spin transition rates are only partly understood. This work directly measures the defect's singlet‐state lifetime, 15(3) ns, using a nanosecond rise‐time dual‐pulse photoluminescence‐recovery method, and shows that high laser ...
Richard A. Escalante, Andrew J. Beling, Daniel G. Ang, Niko R. Reed, Justin J. Welter, John W. Blanchard, Cecilia Campos, Edwin Coronel, Klaus Krambrock, Alexandre S. Leal, Paras N. Prasad, Ronald L. Walsworth   +11 more
wiley   +1 more source

Properties of quadratic maps in a Banach space

Mathematical Notes of the Academy of Sciences of the USSR, 1991
A quadratic mapping of Banach space into \(\mathbb R^ n\times \mathbb R^ n\) is \(Q(x)=A(x,x)\), where \(A: X\times X\to \mathbb R^ n\) and \(A\) is symmetric \(A(x_ 1,x_ 2)=A(x_ 2,x_ 1)\). Some topological and geometrical properties of \(H=\{x\in X, Q(x)\in C\}\), where \(C\) is a closed convex cone in \(\mathbb R^ n\), are considered.
openaire   +3 more sources

A note on quadratic Jordan algebras of degree 3

, 1972
McCrimmon has defined a class of quadratic Jordan algebras of degree 3 obtained from a cubic form, a quadratic mapping and a base point. The structure of such an algebra containing no absolute zero-divisor is determined directly.
M. L. Racine
core   +1 more source

Hard‐Magnetic Soft Millirobots in Underactuated Systems

Advanced Robotics Research, EarlyView.
This review provides a comprehensive overview of hard‐magnetic soft millirobots in underactuated systems. It examines key advances in structural design, physics‐informed modeling, and control strategies, while highlighting the interplay among these domains.
Qiong Wang, Zixuan Zhang, Bingyan Li, Junkai Wang, Hongcheng Gu   +4 more
wiley   +1 more source

Cross-Domain Carotid Artery Segmentation Using Folding Fan ResNet and Quadratic Mapping Loss

IEEE Access
Vessel-wall volume and localized three-dimensional ultrasound (3DUS) metrics are sensitive indicators of carotid atherosclerosis changes in response to therapies.
Zhaozheng Chen, Zhiyin Liu, Bernard Chiu
doaj   +1 more source

Reconstruction of Uncertain Historical Evolution of the Polysyllablization of Chinese Lexis

Journal of Applied Mathematics, 2014
Polysyllablization, closely related to phonetics, semantics, and syntactics, is one of the fundamental trends in the development of Chinese lexis. However, with lots of uncertainties in the historical evolution of Chinese language, the quantitative ...
Bing Qiu, Jie Li
doaj   +1 more source

A mapping associated to a quadratic optimization problem with linear constraints

, 2014
In this working paper we go on with the study of a mapping in Rn associated to a quadratic optimization problem with one equality linear constraint. After showing some general properties related to homogeneity and the inverse mapping, we present some ...
PERETTI, Alberto
core  

Nonlocomotory Robotic Strategies for Dynamic Rotation Control in Terrestrial Robots: A Review

Advanced Robotics Research, EarlyView.
Terrestrial robots increasingly require rapid body rotation to maintain stability and agility in complex environments. This review shows nonlocomotory rotational control strategies that operate without ground contact, including reaction wheels, tails, bars, limbs, and thrusters.
Y. Liang, J. An, X. Zheng, D. Wang, S. Wang, X. Wang, P. Zhu, J. Pei, S. Li, J. Paripurana, Y. Han, Z. Tang, X. Gan, Q. He, X. Ma   +14 more
wiley   +1 more source

Propagation of dust acoustic shocks and oscillatory waves in a coupled complex plasma described by nonlinear evolution equations

Partial Differential Equations in Applied Mathematics
The Burgers equations involving quadratic, cubic, and both quadratic and cubic nonlinearity are derived by assuming the appropriate stretching to describe the propagation of electrostatic shock and oscillatory waves in a coupled complex plasma having ...
M.N. Islam, M.G. Hafez
doaj   +1 more source

Multidirectional Motion Strategy of Miniature Water Surface Robot Actuated by Single Exciter

Advanced Robotics Research, EarlyView.
A novel multidirectional motion strategy on the water surface based on a single exciter is proposed, and a single‐exciter single‐plate module is developed for actuation. The driving forces generation mechanism of the module is revealed from the perspective of the asymmetric surface wave field.
Haoxuan He, Dehong Wang, Jing Li, Shijing Zhang, Yingxiang Liu   +4 more
wiley   +1 more source