Results 101 to 110 of about 10,061 (256)

Trendelenburg positioning with or without norepinephrine infusion for haemodynamic support in anaesthetised hypovolemic horses

Equine Veterinary Journal, EarlyView.
Abstract Background Intraoperative haemorrhage during equine anaesthesia is a rare but potentially fatal complication requiring prompt haemodynamic support. Postural manoeuvres such as Trendelenburg (TL) positioning and vasopressor support augment venous return and improve cardiac output (CO), yet their efficacy in anaesthetised hypovolemic horses ...
Vaidehi V. Paranjape, Klaus Hopster, Ismar Lutvikadic, Bernd Driessen   +3 more
wiley   +1 more source

Condition monitoring of axial piston pumps based on machine learning-driven real-time CFD simulation

Engineering Applications of Computational Fluid Mechanics
Condition monitoring of axial piston pumps is essential for the stable and safe operation of the entire hydraulic system in various electro-hydraulic equipment.
Wentao Wang, Qun Chao, Junjie Shi, Chengliang Liu   +3 more
doaj   +1 more source

Implantable drug delivery system: Frontiers of medicine‐engineering interdisciplinary

Interdisciplinary Medicine, EarlyView.
This review systematically summarizes the driving mechanisms of implantable on‐demand drug delivery systems (IDDS), including endogenous, exogenous, and closed‐loop strategies. It highlights the pivotal roles of flexible electronics and miniaturization in enhancing the tissue conformity and spatial adaptability.
Yu Zeng, Rongtai Su, Manyu Zhao, Xin Song, Ran Liu, Yuhao Zhou, Chaojuan Yang, Yanli Jiao, Xiao‐Wei Xiang, Lingqian Chang   +9 more
wiley   +1 more source

Experimental study on phase diversity wavefront sensing technology in piston error detection

Acta Physica Sinica, 2012
Phase diversity wavefront sensing technology has been implemented successfully in many domains because of its simple and compact optical configuration, lower environment requirement, better measurement accuracy, and so on. In this paper, the co-phasing technique for segment primary mirrors is studied by using the phase diversity wavefront sensing ...
null Luo Qun, null Huang Lin-Hai, null Gu Nai-Ting, null Li Fei, null Rao Chang-Hui   +4 more
openaire   +1 more source

Quantifying user variability in the traditional X‐ray ice‐rafted‐debris counting technique

Journal of Quaternary Science, EarlyView.
ABSTRACT The flux of icebergs is most commonly constrained in the palaeo‐record by manually counting gravel clasts in sediment core X‐ray images—a trusted method in Quaternary science and palaeoceanography for nearly 40 years. In this study, we explore the reproducibility (user consistency and between‐user variability) of the traditional clast‐counting
Neil McDonald, Tom Bradwell, S. Louise Callard, Jaime L. Toney   +3 more
wiley   +1 more source

Bed‐level tools for monitoring erosion and accretion patterns: Flume validation and field testing

Limnology and Oceanography: Methods, EarlyView.
Abstract Monitoring short‐term changes in surface sediment elevation is fundamental to understanding erosion, transport, and deposition dynamics in shallow coastal environments. However, commonly used field approaches, such as horizontal markers, sediment erosion tables, subsurface sediment plates, or erosion pins, are not always cross‐validated under ...
Lucía Rodríguez‐Arias, Inés Mazarrasa, Beatriz Marin‐Diaz, Teresa Alcoverro, Barbara Ondiviela, Jordi F. Pagès, Eduardo Infantes   +6 more
wiley   +1 more source

Robust Position Control of an Electro‐Hydraulic Actuator via Metaheuristic Optimization of a Fractional‐Order PID Controller

International Journal of Mechanical System Dynamics, EarlyView.
ABSTRACT In this study, a robust position control strategy is presented for a two‐stage electro‐hydraulic actuator system using a fractional‐order proportional–integral–derivative (FOPID) controller tuned by Kirchhoff's law algorithm (KLA). Electro‐hydraulic systems exhibit strong nonlinearities, parameter uncertainties, and external disturbances ...
Ridvan Firat Cinar, Davut Izci, Serdar Ekinci, Mohammad Salman, Mohammad Al‐Rabayah, Ali Akdagli, Ali Yildiz, Filiz Karaomerlioglu, Gökhan Yüksek   +8 more
wiley   +1 more source

An Experimental and Numerical Simulation Study on a Three-Hydraulic-Cylinder Synchronous Steering Offset Actuator Driven by a Drilling Fluid Rotary Valve Distributor

Applied Sciences
The rotary steerable system (RSS) is the core equipment for precise wellbore trajectory control in deep oil and gas drilling, and its performance is directly determined by the coordination and adaptability of the tool’s offset actuator and control ...
Junfeng Kang, Gonghui Liu, Tian Chen, Chunqing Zha, Wei Wang, Lincong Wang   +5 more
doaj   +1 more source

Analysis and control of a spark ignition free-piston engine generator [PDF]

, 2016
PhD ThesisIn this research, the performance analysis and control strategy of a spark-ignited free-piston engine generator were presented. A literature review of the free-piston engine fundamental information and the recent research development on the ...
Jia, Boru
core  

Design, Analysis, and Experimental Validation of a Variable‐Gap Magnetorheological Damper for Seat Suspension

International Journal of Mechanical System Dynamics, EarlyView.
ABSTRACT To address the dual challenges of routine driving vibration and impact loads in vehicle seat suspensions, a novel variable‐gap magnetorheological damper (VGMRD) is proposed. By combining a tapered piston with a conformal variable‐diameter cylinder, stroke‐dependent, dual‐mode damping characteristics are achieved without the need for complex ...
Min Wei, Yuchen He, Xiaoting Rui, Yixin Liu, Lilin Gu   +4 more
wiley   +1 more source