Results 141 to 150 of about 612,388 (310)

Do Sustainable Agricultural Practices Boost Production and Technical Efficiency? A Case Study of Coffee Smallholders in Peru

open access: yesAgribusiness, EarlyView.
ABSTRACT Smallholder agriculture remains a cornerstone for economic development and poverty reduction in Latin America. Their transition to sustainable agricultural production is critical in the face of the environmental challenges posed by conventional farming practices and is a key pathway to achieving the United Nations' Sustainable Development ...
Gabriela Carbajo‐Alvarez   +2 more
wiley   +1 more source

Multiresponsive Color‐Tunable Phosphorescence With Matrix‐Confined Clusters

open access: yesAggregate, EarlyView.
The molecule with cluster‐triggered emission mechanisms is embedded in polymer matrix, the phosphorescence properties of multiclusters are size‐dependent and exhibit different responses to various stimuli, including temperature, concentration, and excitation, which synergistically induce color‐range tunable time‐dependent phosphorescence color behavior.
Lihui Hou   +4 more
wiley   +1 more source

Model‐based fault diagnosis in closed‐loop safety‐critical chemical reactors: An experimental study

open access: yesAIChE Journal, EarlyView.
Abstract This experimental study investigates fault detection and estimation in a continuous stirred‐tank reactor (CSTR) system under closed‐loop feedback control, including an analysis of different manipulative inputs for temperature regulation. A novel fault diagnosis approach is proposed, combining residual signal analysis and T2 statistic for real ...
Pu Du, Benjamin Wilhite, Costas Kravaris
wiley   +1 more source

On the Mechanism of Soft Self‐Assembly from Melt: The Ubiquitous Heat Capacity Hump and Spontaneous Melt Chirality

open access: yesAngewandte Chemie, EarlyView.
Phase transition from melt to most complex liquid crystal (LC) phases is weak 1st order but is preceded by a large heat capacity maximum. In addition, a chiral liquid forms through another transition before that to the LC, despite the compounds being achiral.
Yi‐nan Xue   +9 more
wiley   +2 more sources

On the second eigenvalue of nonlinear eigenvalue problems

open access: yesElectronic Journal of Differential Equations, 2018
This article is devoted to the characterization of the second eigenvalue of nonlinear eigenvalue problems. We propose an abstract approach which allows to treat nonsmooth quasilinear problems and also to recover, in a unified way, previous results concerning the p-Laplacian.
DEGIOVANNI M., MARZOCCHI M.
openaire   +2 more sources

Joint Situational Assessment‐Hierarchical Decision‐Making Framework for Maneuver Intent Decisions

open access: yesAdvanced Intelligent Systems, EarlyView.
This study introduces a new framework for decision‐making in unmanned combat aerial vehicles (UCAVs), integrating graph convolutional networks and hierarchical reinforcement learning (HRL). The method tackles adopts a curriculum‐based training approach guided by cross‐entropy rewards.
Ruihai Chen   +4 more
wiley   +1 more source

Robust Reinforcement Learning Control Framework for a Quadrotor Unmanned Aerial Vehicle Using Critic Neural Network

open access: yesAdvanced Intelligent Systems, Volume 7, Issue 3, March 2025.
Quadrotor unmanned aerial vehicle control is critical to maintain flight safety and efficiency, especially when facing external disturbances and model uncertainties. This article presents a robust reinforcement learning control scheme to deal with these challenges.
Yu Cai   +3 more
wiley   +1 more source

Zwitterionic Heavier Pnictinidenes in Redox Catalysis

open access: yesAngewandte Chemie, EarlyView.
Zwitterionic pnictinidenes: A new class of zwitterionic heavier pnictogen species stabilized by bis(N‐heterocyclic carbene)borate ligands is reported, enabling the isolation of Sb and Bi in multiple oxidation states. These thoroughly characterized systems exhibit cationic character and engage in redox catalysis, facilitating catalytic ...
Selwin Fernando   +7 more
wiley   +2 more sources

Impact of eigenvalues on the electron-phonon coupling strength of aluminium and its binary alloys

open access: yesBibechana, 2014
Aluminium is a third group element according to the periodic table. Chemically it is a reactive metal often forming complexes within its binary alloys.
B. K. Kantha   +3 more
doaj  

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