Results 21 to 30 of about 22,616,288 (249)

Trajectory Tracking Control of Surface Vehicles: A Prescribed Performance Fixed-Time Control Approach

IEEE Access, 2020
This article focuses on the fixed-time trajectory tracking problem for surface vehicles (SVs) with prescribed performance. First, to realize prescribed performance, the error transformation and fixed-time prescribed performance function are proposed.
Tingting Yang, Zuxin Li, Jiaju Yu
doaj   +1 more source

Prescribed-Time Formation Tracking Control for Underactuated USVs with Prescribed Performance

Journal of Marine Science and Engineering
This article proposes a prescribed-time formation tracking control scheme for USVs with prescribed performance constraints to address the issue of multiple underactuated USV formation tracking control with external environmental disturbances and input ...
Bowen Sui, Jianqiang Zhang, Zhong Liu
doaj   +1 more source

Adaptive formation control for autonomous surface vessels with prescribed-time convergence

International Journal of Advanced Robotic Systems, 2022
This article is dedicated to solving the problem of predefined-time cooperative control for autonomous surface vessels encountering model uncertainties and external perturbations.
Ziyang Huang, Jun Li, Bing Huang
doaj   +1 more source

Primitive polynomials with prescribed second coefficient [PDF]

, 2006
The Hansen-Mullen Primitivity Conjecture (HMPC) (1992) asserts that, with some (mostly obvious) exceptions, there exists a primitive polynomial of degree n over any finite fieldwith any coefficient arbitrarily prescribed.
Cohen, Stephen D., Presern, M., Cohen, S.D., Prešern, Mateja   +3 more
core   +1 more source

Prescribed Time Fault-Tolerant Affine Formation Control for Multi-Agent Systems with Double-Integrator Dynamics

, 2023
There is an increasing interest in the affine formation control of multi-agent systems, because it can change the centroid, orientation and scale of the formation by controlling only a few leaders.
Jiye Tang, Zhaoping Du, Yunkai Wu, Xiaofei Yang, Jianzhen Li   +4 more
core   +1 more source

Early Body Mass Index z‐Score Change and Resolution of Severe Malnutrition in Children With Sickle Cell Anemia in a Low‐Income Setting: A Prospective Single‐Arm Extension Study

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Background Children with sickle cell anemia (SCA) in low‐income settings are at risk of severe malnutrition, but optimal nutritional management has not been established. We evaluated an intensified ready‐to‐use therapeutic food (RUTF) regimen in children with persistent severe malnutrition after initial treatment and assessed whether early ...
Safiya Gambo, Shehu Umar Abdullahi, Hassan Adam Murtala, Halima Kabir, Khadija A. Shamsu, Sari A. Acra, Virginia A. Stallings, Mark Rodeghier, Michael R. DeBaun, Lauren J. Klein   +9 more
wiley   +1 more source

Prescribed-Time Sliding-Mode Fault-Tolerant Control for Quadrotor UAVs Based on Disturbance Observer

Applied Sciences
This paper mainly focuses on the prescribed-time attitude tracking problem of quadrotor unmanned aerial vehicles (QUAVs) with unknown disturbances and actuator faults.
Kun Wang, Wenxuan Hao, Guoyuan Qi, Liya Li, Yan Gao   +4 more
doaj   +1 more source

Adaptive fuzzy finite-time control with prescribed performance for waverider vehicles

Measurement + Control, 2022
This paper proposes an adaptive fuzzy control method with prescribed performance for Waverider Vehicles (WVs), being able to guarantee finite-time convergence and small overshoot for tracking errors.
Baoxu Jiang, Xiangwei Bu
doaj   +1 more source

Global Prescribed-Time Second-Order Sliding Mode Controller Design Subject to Asymmetric Output Constraint

IEEE Access, 2023
In this work, a prescribed-time second-order sliding mode (SOSM) controller is constructed to address a class of nonlinear systems in the presence of asymmetric output constraints.
Wei Kang, Kaibo Shi, Jun Cheng
doaj   +1 more source

Impact of Radiation Therapy on Physical and Psychosocial Health of Adolescents and Young Adults: A Joint Report From the Children's Oncology Group AYA and Radiation Oncology Committees

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Rates of cancer among adolescents and young adults (AYA), age 15–39 years, are increasing. Consequently, radiation oncologists are treating more AYAs who have diagnoses spanning both pediatric and adult practices. Compared to pediatric and older adult patients, AYAs face a unique set of challenges.
Hesham Elhalawani, Rachel K. Peterson, Avani D. Rao, Laurie J. McKenzie, Ahmed Magdy Elmotayam, Leslie Chang, Michael Roth, Susan L. McGovern   +7 more
wiley   +1 more source