Results 71 to 80 of about 79,894 (308)

CX3CL1 in Early Detection of Alzheimer's Disease: Plasma Dynamics Across Age and Disease Stages

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Backgrounds Alzheimer's disease (AD) is characterized by amyloid‐beta plaques, tau tangles, and neuroinflammation. C‐X3‐C motif chemokine ligand 1 (CX3CL1, also known as fractalkine), a neuroimmune chemokine implicated in AD pathogenesis, shows inconsistent alterations in plasma/serum across studies.
Ling Wang, Yujie Liu, Fei Li, Xuelin Li, Lanlan Li, Jie Zhang, Yali Xu   +6 more
wiley   +1 more source

Adaptive NMPC for trajectory tracking of 4WID-4WIS mobile robot

Smart Agricultural Technology
This paper investigates the trajectory tracking control problem of four-wheel independently driven and steered (4WID-4WIS) mobile robots for operation in dwarf dense orchards. A trajectory tracking method based on Nonlinear Model Predictive Control (NMPC)
Song Bi, Zirong Xiao, Zhijun Li, Ang Bi, Yifei Xiao   +4 more
doaj   +1 more source

Time-varying dynamic modeling and trajectory tracking control for variable-load unmanned aerial vehicle [PDF]

Frontiers of Agricultural Science and Engineering
The dynamic variation issues of variable-load unmanned aerial vehicle (UAV) used in agricultural plant protection activities was addressed by a disturbance-resistant control system based on PD (proportional-derivative) sliding mode control. First, a time-
Xin ZHANG, Shuting XU, Wenjie CHANG, Feng KANG   +3 more
doaj   +1 more source

Frictional forces and torques compensation based cascaded sliding-mode tracking control for an uncertain omnidirectional mobile robot

Measurement + Control, 2022
The work presented here deals with the trajectory-tracking control of omnidirectional mobile robots using a novel robust control technique. The aim is to achieve good tracking performance in the presence of frictional forces and torques, uncertainties ...
Hsiu-Ming Wu, Mansour Karkoub
doaj   +1 more source

Value of MRI Outcomes for Preventive and Early‐Stage Trials in Spinocerebellar Ataxias 1 and 3

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective To examine the value of MRI outcomes as endpoints for preventive and early‐stage trials of two polyglutamine spinocerebellar ataxias (SCAs). Methods A cohort of 100 participants (23 SCA1, 63 SCA3, median Scale for the Assessment and Rating of Ataxia (SARA) score = 5, 42% preataxic, and 14 gene‐negative controls) was scanned at 3T up ...
Thiago J. R. Rezende, Emilien Petit, Young Woo Park, Sophie Tezenas du Montcel, James M. Joers, Jonathan M. DuBois, H. Moore Arnold, Michal Povazan, Ipek Özdemir, Guita Banan, Romain Valabregue, Philipp Ehses, Jennifer Faber, Chiadi U. Onyike, Peter B. Barker, Jeremy D. Schmahmann, Eva‐Maria Ratai, Sub H. Subramony, Thomas H. Mareci, Khalaf O. Bushara, Henry Paulson, Thomas Klockgether, Alexandra Durr, Tetsuo Ashizawa, Christophe Lenglet, Gülin Öz, READISCA Investigators   +26 more
wiley   +1 more source

Real-time Trajectory Planning and Tracking Control of Bionic Underwater Robot in Dynamic Environment

Cyborg and Bionic Systems
In this article, we study the trajectory planning and tracking control of a bionic underwater robot under multiple dynamic obstacles. We first introduce the design of the bionic leopard cabinet underwater robot developed in our lab.
Feng Ding, Rui Wang, Tiandong Zhang, Gang Zheng, Zhengxing Wu, Shuo Wang   +5 more
doaj   +1 more source

A Vehicle Trajectory Tracking Method With a Time-Varying Model Based on the Model Predictive Control

IEEE Access, 2020
The vehicle trajectory tracking algorithm is one of the key and difficult issues of intelligent driving technologies. In current control algorithms for the vehicle trajectory tracking, there are three main assumptions: the standard working condition for ...
Xiaohua Song, Yiming Shao, Zhihua Qu
doaj   +1 more source

Fluid Biomarkers of Disease Burden and Cognitive Dysfunction in Progressive Supranuclear Palsy

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Identifying objective biomarkers for progressive supranuclear palsy (PSP) is crucial to improving diagnosis and establishing clinical trial and treatment endpoints. This study evaluated fluid biomarkers in PSP versus controls and their associations with regional 18F‐PI‐2620 tau‐PET, clinical, and cognitive outcomes.
Roxane Dilcher, Charles B. Malpas, Stuart J. McDonald, William T. O’Brien, Craig Despott, Kelly L. Bertram, Matthew P. Pase, Lukas Frontzkowski, Meng Law, Terence J. O’Brien, Lucy Vivash   +10 more
wiley   +1 more source

Intelligent Sliding Mode Control for Quadrotor Trajectory Tracking Under External Disturbances

This paper proposes particle swarm optimization (PSO) and cuckoo search (CS) approaches based on the sliding mode controller (SMC) structure for the unmanned quadrotor’s flights. The control law is derived from the Lyapunov theory to guarantee the closed-
Mostafa Mjahed, Abdeljalil El Kari, Nada El Gmili, Hassan Ayad, Khadija El Hamidi   +4 more
core   +1 more source

Trajectory Tracking for UAVs: An Interpolating Control Approach

2024 28th International Conference on Methods and Models in Automation and Robotics (MMAR)
7 pages, submitted to MMAR2024 ...
Zdenek Boucek, Miroslav Flídr, Ondrej Straka   +2 more
openaire   +2 more sources