Results 81 to 90 of about 1,930 (243)

A Model for Predicting Post-Stall Behavior of Axial Compressors

Journal of Applied Fluid Mechanics, 2021
The current paper reports on a new theory developed by modifying the basic Moore-Greitzer model, which can predict the performance of a compression system during the instabilities in more details.
M. Shahriyari, H. Khaleghi, M. Heinrich
doaj  

In Favor of Digital Detox: Developing the Attitude Toward Digital Detox Scale

Psychology &Marketing, EarlyView.
ABSTRACT The extensive usage of digital devices can lead to technological overload, potentially damaging interpersonal relations, individual performance, and personal well‐being. Digital detox describes consumers' counter‐reaction by intentionally reducing the use of digital devices for a specific period of time.
Svenja Winkler, Lisa Eckmann, Torsten Bornemann, Jan R. Landwehr   +3 more
wiley   +1 more source

Monitoring shallow geothermal aquifers with active‐source distributed acoustic sensing: A prognostic feasibility study on the University of Leeds Geothermal Campus

Near Surface Geophysics, EarlyView.
Abstract The United Kingdom's shallow aquifers offer significant but underdeveloped geothermal energy resource. Seismic methods can help address this by improving the understanding of aquifer heterogeneity and potentially allowing long‐term monitoring of thermal plumes.
Adam D. Booth, Roger A. Clark, Andy Nowacki, Ravi Myanger, Joseph Kelly, Sjoerd de Ridder, Arka Dyuti Sarkar, Fleur Loveridge, Richard Collier, Emma Bramham, David Healy   +10 more
wiley   +1 more source

Experimental Investigation of Stall Inception Mechanisms of Low Speed Contra Rotating Axial Flow Fan Stage

International Journal of Rotating Machinery, 2015
The present paper is an attempt in understanding the stall inception mechanism in a low speed, contra rotating axial flow fan stage, using wavelet transforms.
Tegegn Dejene Toge, A. M. Pradeep
doaj   +1 more source

Weeds in a changing climate: Competitors or service plants?

PLANTS, PEOPLE, PLANET, EarlyView.
Reducing herbicide use and preparing agroecosystems for climate change are two top priorities on the global policy agenda. Here, we explore whether these two challenges can be tackled simultaneously. While weeds are generally considered a threat to crop production, we show that weeds can help overcome climate change challenges in agroecosystems ...
Marie J. Zwetsloot, Marie‐Charlotte Bopp, Lammert Bastiaans, Elena Kazakou, Aurélie Metay, Gabriel Y. K. Moinet, Karim Barkaoui, Guillaume Fried, Léo Garcia, Merel Hofmeijer, Martine van der Ploeg, Maria Stefania Przybylska, Gerlinde B. De Deyn   +12 more
wiley   +1 more source

Sliding Mode Control in Aerospace Applications: A Survey

International Journal of Robust and Nonlinear Control, EarlyView.
ABSTRACT Sliding mode control (SMC) enjoys robustness to matched and unmatched (in the case of minimum phase input‐output dynamics) bounded perturbations, and finite time convergence. Second‐order and higher‐order sliding mode control systems (2‐SMC/HOSMC) retain all the advantages of sliding mode control, but in addition can be applied to systems of ...
Yuri Shtessel, Christopher Edwards
wiley   +1 more source

EEMD analysis of unsteady pressure pulsations of a high-pressure reactor circulating pump under off-design working conditions

Nuclear Engineering and Technology
High-pressure reactor circulating pumps are widely used in nuclear power systems to maintain the cooling circulation of reactors and serve as the primary loop pump.
Ning Zhang, Jiaqing Chen, Hui Liu, Mona Gad, Bo Gao   +4 more
doaj   +1 more source

Equity‐Calibrated Technology Forecasting for Sustainable Development: A Portable ADOPT Framework Integrating Bayesian‐Ising Diagnostics

Sustainable Development, EarlyView.
ABSTRACT Climate‐smart agriculture (CSA) is widely promoted to enhance resilience and productivity among smallholder farmers, yet its diffusion remains uneven due to structural barriers and heterogeneous adoption contexts. Existing forecasting tools, such as the Adoption and Diffusion Outcome Prediction Tool (ADOPT), estimate adoption trajectories but ...
Denis Momanyi, Jiqin Han, Job K. Lagat, Robert A. Marchant, George M. Ogendi, Hermann Lotze‐Campen, Stefan Sieber   +6 more
wiley   +1 more source

Sensitivity Analysis of Short‐Term Frequency Stability to Post‐Contingency Active Power Increase and Support Duration from Deloaded Wind Turbines

IEEJ Transactions on Electrical and Electronic Engineering, EarlyView.
The growing deployment of Type‐4 wind turbine generators (WTs), driven by carbon neutrality and net‐zero policies, may challenge frequency stability in power systems. Unlike synchronous generators, WTs connected to the power system via converters do not provide inertia.
Seonghoen Oh, Kenichi Kawabe
wiley   +1 more source

Active Power Control of Full‐Scale Converter‐Based Wind Turbine Considering Turbine Angular Velocity for Short‐Term Frequency Stability in Power Systems

IEEJ Transactions on Electrical and Electronic Engineering, EarlyView.
The increasing deployment of wind turbine generators (WTs) may alter the frequency stability of power systems. Unlike traditional synchronous generators, WTs are connected to the power system through converters. Consequently, WTs cannot provide an inertia response to the power system. Nevertheless, the converters can perform rapid control.
Seonghoen Oh, Kenichi Kawabe
wiley   +1 more source