Results 41 to 50 of about 355 (157)

LESO Based Dynamic Surface Control for Hypersonic Flight Vehicle

, 2018
In the presence of model parametric uncertainties and external disturbances, a LESO-based dynamic surface control approach is designed for the longitudinal model of Hypersonic Flight Vehicle (HFV).
Minghuan Zhang, Pei Wang, Ke Zhang, Wenjun Yang   +3 more
core   +3 more sources

Betwixt playing the waiting game and waiting in vain: Temporal governance and the thin alignment of care under universal health coverage in Kenya

Medical Anthropology Quarterly, EarlyView.
Abstract This article investigates how Kenyan citizens access healthcare within the framework of Universal Health Coverage (UHC) reforms. Based on ethnographic fieldwork, it reconceptualizes waiting as a politically structured phenomenon rather than a simple delay. The analysis shows that UHC reforms do not eliminate waiting but instead redistribute it,
Edwin Ambani Ameso
wiley   +1 more source

Linear Active Disturbance Rejection Control for DC Bus Voltage Under Low-Voltage Ride-Through at the Grid-Side of Energy Storage System

Energies, 2020
The energy storage inverter system has the characteristics of nonlinearity, strong coupling, variable parameters, and flexible mode switching between parallel and off grid.
Youjie Ma, Luyong Yang, Xuesong Zhou, Xia Yang, Yongliang Zhou, Bo Zhang   +5 more
doaj   +1 more source

Model‐free predictive control of non‐isolated two‐stage AC–DC–DC converter based on linear extended state observer

, 2022
The conventional model predictive control (MPC) method of the non-isolated two-stage AC-DC-DC converter has poor robustness and dynamic characteristics under conditions of model mismatch, external disturbance, and load disturbance. To solve this problem,
Dongliang Ke, Chen, Wei, Ke, Dongliang, Xu, Libin, Yu, Xinhong, Jose Rodriguez, Wei Chen, Rodriguez, Jose, Wang, Fengxiang, Xinhong Yu, Fengxiang Wang, Libin Xu   +11 more
core   +1 more source

Spaceflight and sport science: Physiological monitoring and countermeasures for the astronaut–athlete on Mars exploration missions

Experimental Physiology, EarlyView.
Abstract Long‐duration spaceflight impacts essentially every system in the human body, resulting in multisystem deconditioning that might impair the health and performance of crewmembers, particularly on long‐duration exploration missions to Mars. In this review, we apply the sport science model of athlete monitoring, testing and training to astronauts;
Luke DeVirgiliis, Nicholas J. Goode, Kurt W. McDowell, Kirk L. English, Robert Novo, Virina Botros, Ginika Agwu, Jessica M. Scott, Lori L. Ploutz‐Snyder   +8 more
wiley   +1 more source

Physical Fitness and Device‐Based Moderate‐to‐Vigorous Physical Activity and Risk of Long‐Term Sickness Absence—A Prospective Cohort Study With 8‐Year Follow‐Up

European Journal of Sport Science, Volume 26, Issue 7, July 2026.
ABSTRACT We examined the association of physical fitness (PF) and accelerometer‐based moderate‐to‐vigorous intensity physical activity (MVPA) with long‐term sickness absence (LTSA) incidence over an 8‐year of follow‐up in Finnish working‐age population.
Valtteri Pohjola, Katariina Sarttila, Suvi Parikka, Annamari Lundqvist, Jouni Lahti   +4 more
wiley   +1 more source

New Double Closed Loop Linear Active Disturbance Rejection Control of Energy Storage Grid-Connected Inverter Based on Lead-Lag Correction Link

IEEE Access, 2020
The energy storage grid-connected inverter system is a complex system with strong nonlinearity and strong coupling, which quality and efficiency of grid-connection are affected by factors such as grid voltage fluctuations and model uncertainty.
Youjie Ma, Luyong Yang, Xuesong Zhou, Xia Yang   +3 more
doaj   +1 more source

Sleep Traits and Cognitive Function: A Prospective Cohort Study With Exploration of Inflammatory Biomarkers

Brain and Behavior, Volume 16, Issue 6, June 2026.
ABSTRACT Introduction Although sleep disturbance is closely linked to cognitive impairment, the specific sleep‐related characteristics driving this deficit remain undetermined, with the mechanistic contribution of biomarkers also poorly characterized.
Chi Peng, Fan Yang, Fanfan Li, Ronghui Zhu, Lei Li, Zhentao Zhang, Jianyao You, Rui Wang, Yingyi Qin, Shuogui Xu   +9 more
wiley   +1 more source

Output Feedback Control via Linear Extended State Observer for an Uncertain Manipulator with Output Constraints and Input Dead-Zone

, 2020
This paper proposes an output feedback controller with a linear extended state observer (LESO) for an n-degree-of-freedom (n-DOF) manipulator under the presence of external disturbance, an input dead-zone, and time-varying output constraints.
Duc Thien Tran, Truong Quang Dinh, Hoang Vu Dao, Kyoung Kwan Ahn   +3 more
core   +1 more source

Century‐long trends in plant diversity of temperate mountain vegetation are modulated along elevation gradient

Journal of Ecology, Volume 114, Issue 3, March 2026.
Resurvey studies in mountain forests of the Tatra Mountains (Central Europe) show that plant diversity has increased over the past century, particularly at lower elevations. These shifts were associated more with increased nitrogen deposition and reduced grazing pressure than with direct climate warming.
Kacper Foremnik, Radim Hédl, Antoni Zięba, Jerzy Szwagrzyk, Bartłomiej Surmacz, Remigiusz Pielech   +5 more
wiley   +1 more source