Results 21 to 30 of about 505,776 (261)

A Lateral Control Method for Wheel-Footed Robot Based on Sliding Mode Control and Steering Prediction

open access: yesIEEE Access, 2018
In order to improve the accuracy and enhance stability of the tracking system of wheel-footed robot, the lateral control problem in the process of wheel movement is discussed.
Wei Shen, Zhichun Pan, Min Li, Hui Peng
doaj   +1 more source

Model-free reinforcement learning for robust locomotion using demonstrations from trajectory optimization

open access: yesFrontiers in Robotics and AI, 2022
We present a general, two-stage reinforcement learning approach to create robust policies that can be deployed on real robots without any additional training using a single demonstration generated by trajectory optimization.
Miroslav Bogdanovic   +3 more
doaj   +1 more source

Design and Analysis of a Linear Hybrid Excitation Flux-Switching Generator for Direct Drive Wave Energy Converters

open access: yesAdvances in Mechanical Engineering, 2013
Linear generators have the advantage of a simple structure of the secondary, which is suitable for the application of wave energy conversion. Based on the vernier hybrid machines (VHMs), widely used for direct drive wave energy converters, this paper ...
Lei Huang   +4 more
doaj   +1 more source

Performance and Characteristics of Wearable Sensor Systems Discriminating and Classifying Older Adults According to Fall Risk: A Systematic Review

open access: yesSensors, 2021
Sensor-based fall risk assessment (SFRA) utilizes wearable sensors for monitoring individuals’ motions in fall risk assessment tasks. Previous SFRA reviews recommend methodological improvements to better support the use of SFRA in clinical practice. This
Annica Kristoffersson   +2 more
doaj   +1 more source

The influence between gestational age and postural control, a systematic review

open access: yesFrontiers in Pediatrics, 2022
The central nervous system (CNS) of preterm infants might have some peculiarities which distinguish it from that of full term infants. The difficulties associated with prematurity are the main cause of deaths all over the world during the new-born period
Isabel Tuñón-Domínguez   +7 more
doaj   +1 more source

The control of the motion of a pantograph

open access: yesMathematical and Computer Modelling, 1998
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
openaire   +2 more sources

The Use of Functional Electrical Stimulation on the Upper Limb and Interscapular Muscles of Patients with Stroke for the Improvement of Reaching Movements: A Feasibility Study

open access: yesFrontiers in Neurology, 2017
IntroductionReaching movements in stroke patients are characterized by decreased amplitudes at the shoulder and elbow joints and greater displacements of the trunk, compared to healthy subjects.
Alicia Cuesta-Gómez   +6 more
doaj   +1 more source

Rotational motion control of a spacecraft

open access: yesIEEE Transactions on Automatic Control, 2003
The paper adopts the energy shaping method to control of rotational motion. A global representation of the rigid body motion is given in the canonical form by a quaternion and its conjugate momenta. A general method for motion control on a cotangent bundle to the 3-sphere is suggested.
Wisniewski, Rafal, Kulczycki, P.
openaire   +3 more sources

Analytical Modeling of Static Eccentricities in Axial Flux Permanent-Magnet Machines with Concentrated Windings

open access: yesEnergies, 2016
The aim of this paper is to calculate the static eccentricity (SE) of a double rotor axial flux permanent magnet (AFPM) machine by using a general analytical model. The flux density in the air gap under healthy conditions is calculated firstly, where the
Yunkai Huang   +3 more
doaj   +1 more source

Heterogeneity in the Global Practice of Central Nervous System Staging in Pediatric Acute Lymphoblastic Leukemia

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT Background Central nervous system (CNS) involvement in childhood acute lymphoblastic leukemia (ALL) is assessed by cell counting and cytomorphology from cerebrospinal fluid (CSF) and is used for treatment stratification worldwide. The ratio of “CNS2” patients in clinical trials ranges from 3% to 40%, with unclear prognostic significance ...
Laura Almási   +14 more
wiley   +1 more source

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