Results 21 to 30 of about 471,373 (286)

An Evaluation of the Zeeman Shift of the 87Sr Optical Lattice Clock at the National Time Service Center

open access: yesApplied Sciences, 2020
The Zeeman shift plays an important role in the evaluation of optical lattice clocks since a strong bias magnetic field is applied for departing Zeeman sublevels and defining a quantization axis.
Xiaotong Lu   +4 more
doaj   +1 more source

Lane Change Trajectory Planning Based on Quadratic Programming in Rainy Weather

open access: yesWorld Electric Vehicle Journal, 2023
To enhance the safety and stability of lane change maneuvers for autonomous vehicles in adverse weather conditions, this paper proposes a quadratic programming−based trajectory planning algorithm for lane changing in rainy weather. Initially, in order to
Chengzhi Deng   +4 more
doaj   +1 more source

Overdamped sine-Gordon kink in a thermal bath [PDF]

open access: yes, 1999
We study the sine-Gordon kink diffusion at finite temperature in the overdamped limit. By means of a general perturbative approach, we calculate the first- and second-order (in temperature) contributions to the diffusion coefficient.
A. Barone   +28 more
core   +4 more sources

Topological quadratic-node semimetal in a photonic microring lattice

open access: yesNature Communications, 2023
Graphene, with its two linearly dispersing Dirac points with opposite windings, is the minimal topological nodal configuration in the hexagonal Brillouin zone. Topological semimetals with higher-order nodes beyond the Dirac points have recently attracted
Zihe Gao   +7 more
doaj   +1 more source

Perturbations of quadratic centers of genus one

open access: yesDiscrete & Continuous Dynamical Systems - A, 2009
28 ...
Gautier, Sebastien   +2 more
openaire   +3 more sources

Inverse kinematics for the variable geometry truss manipulator via a Lagrangian dual method

open access: yesInternational Journal of Advanced Robotic Systems, 2016
This article studies the inverse kinematics problem of the variable geometry truss manipulator. The problem is cast as an optimization process which can be divided into two steps.
Yanchun Zhao   +2 more
doaj   +1 more source

Bifurcation of Limit Cycles from Quadratic Centers

open access: yesJournal of Differential Equations, 1995
The purpose of the paper is to determine the maximum number and relative positions of limit cycles which can appear in a quadratic system possessing at least one center under slight quadratic perturbation. Combining the use of the Pontryagin integrals with the theory of rotated vector fields, the authors determine the geometric form of the bifurcation ...
Shafer, D.S., Zegeling, A.
openaire   +1 more source

Adaptive Model Predictive Control of a Two-wheeled Robot Manipulator with Varying Mass

open access: yesMeasurement + Control, 2018
This paper presents the adaptive model predictive control approach for a two-wheeled robot manipulator with varying mass. The mass variation corresponds to the robot picking and placing objects or loads from one place to another.
Mert Önkol, Coşku Kasnakoğlu
doaj   +1 more source

The effect of washing parameters on the quantity of dye discharge from clothes

open access: yesFashion and Textiles, 2022
In this paper, the effect of washing parameters on the quantity of dye discharge from fabric dyed in highly saturated color (FSC) was discussed. Firstly, the FSC was prepared with reactive red 195 to represent the dark clothes.
Xu Zhao   +5 more
doaj   +1 more source

Algebraic Limit Cycles Bifurcating from Algebraic Ovals of Quadratic Centers [PDF]

open access: yesInternational Journal of Bifurcation and Chaos, 2018
In the integrability of polynomial differential systems it is well known that the invariant algebraic curves play a relevant role. Here we will see that they can also play an important role with respect to limit cycles.In this paper, we study quadratic polynomial systems with an algebraic periodic orbit of degree [Formula: see text] surrounding a ...
Jaume Llibre, Yun Tian
openaire   +7 more sources

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