Results 61 to 70 of about 72,328 (282)

A transient boundary element method model of Schroeder diffuser scattering using well mouth impedance [PDF]

, 2008
Room acoustic diffusers can be used to treat critical listening environments to improve sound quality. One popular class is Schroeder diffusers, which comprise wells of varying depth separated by thin fins.
Cox, TJ, Hargreaves, JA
core   +1 more source

Synchrotron Radiation for Quantum Technology

Advanced Functional Materials, EarlyView.
Materials and interfaces underpin quantum technologies, with synchrotron and FEL methods key to understanding and optimizing them. Advances span superconducting and semiconducting qubits, 2D materials, and topological systems, where strain, defects, and interfaces govern performance.
Oliver Rader, Sakura Pascarelli, Klaus Attenkofer, Anna A. Makarova, Karsten Holldack, Kai Rossnagel, Kristiaan Temst, George Kourousias, Stefano Carretta, Caterina Biscari, Helmut Dosch   +10 more
wiley   +1 more source

Universal In Situ Isotope Exchange Raman Spectroscopy (IERS) Methodology for Measuring Oxygen Surface Exchange Dynamics Using a Probe Layer

Advanced Functional Materials, EarlyView.
A bespoke multilayer thin film configuration has been designed, which overcomes the material dependency of conventional isotope exchange Raman spectroscopy (IERS). This universal IERS methodology is efficient, non‐destructive and provides additional structural information and time resolution, which can be further extended to various isotopic elements ...
Zonghao Shen, Francesco Chiabrera, Alexander Stangl, Laetitia Rapenne, Federico Baiutti, Carmen Jiménez, Albert Tarancón, Mónica Burriel   +7 more
wiley   +1 more source

A novel method for calculating harmonic contribution based on difference recurrence estimation

IET Generation, Transmission & Distribution
Determining the harmonic contribution of each harmonic source is conducive to improving the harmonic management of the power system. The main problem with harmonic contribution calculation is determining the equivalent system harmonic impedance.
Huichun Hua, Han Gao, Lijie Gao, Haichao Guo   +3 more
doaj   +1 more source

Quantifying Harmonic Responsibilities Based on Kurtosis Detection Principle of Amplitude Fluctuations

IEEE Access, 2018
Harmonics have brought non-negligible harm to the safe and stable operation of power systems. In order to quantify the harmonic responsibilities of different stakeholders based on available monitoring data; this paper proposes a novel method based on the
Jian Wu, Haifeng Qiu, Jinlong Xu, Fei Zhou, Kang Dai, Chen Yang, Dong Lv   +6 more
doaj   +1 more source

Applications of Operational Modal Analysis in Gearbox and Induction Motor, Based on Random Decrement Technique and Enhanced Ibrahim Time Method

Applied Sciences, 2022
There have been steadily growing requirements from the academia and industry, demanding non-invasive methods and reliable measurement systems of research devoted to operational mode analysis (OMA).
Gabriel Castro, Grover Zurita
doaj   +1 more source

Harmonic effects on induction and line start permanent magnet machines [PDF]

, 2013
Power Electronics (PE) are implemented in a wide variety of appliances, either to increase its controllability or energy efficiency, or simply because a DC supply is needed.
Debruyne, Colin, Desmet, Jan, Vandevelde, Lieven   +2 more
core   +1 more source

Harmonizing the Pyrene and Ether Groups in Covalent Triazine Polymers for Highly Effective H2O2 Photosynthesis via One‐Step Two‐Electron Oxygen Reduction

Advanced Functional Materials, EarlyView.
The pyrene and ether groups are incorporated into the covalent triazine polymer (CTP) structure. The synergistic effect of the two functional groups endows CTP with better electron transfer, light absorption, and oxygen activation properties. An impressive apparent quantum yield (13.2% @420 nm) and a remarkable solar‐to‐chemical conversion efficiency ...
Chong Wang, Jinliang Lv, Yichun Lu, Hanfeng Ye, Xuan Zhang, Leonardo Cancellara, Nadezda Tarakina, Jiande Lin, Xin Gao, Oleksandr Savateev, Jiajia Cheng   +10 more
wiley   +1 more source

Communication-Free Equivalent Grid Impedance Estimation Technique for Multi-Inverter Systems

IEEE transactions on industrial electronics (1982. Print), 2023
Interactions between grid-connected inverters bring major problems, such as increased harmonic distortion and instability. Furthermore, as the existing literature on inverter-based online grid impedance estimation mainly focuses on one inverter unit, the
N. Mohammed, T. Kerekes, M. Ciobotaru
semanticscholar   +1 more source

Growth of Millimeter‐Sized BaTaO2N Single Crystals by an NH3‐Assisted BaCl2 Flux Method

Advanced Functional Materials, EarlyView.
Millimeter‐sized BaTaO2N single crystals are successfully grown from a BaCl2 flux under NH3 flow. Their comprehensive characterization, including dielectric properties, is demonstrated, and the possible growth mechanisms are discussed. Abstract Perovskite‐type oxynitrides have attracted considerable attention due to their excellent photocatalytic ...
Ginji Harada, Mirabbos Hojamberdiev, Hajime Wagata   +2 more
wiley   +1 more source