Carrier dynamics and coherent acoustic phonons in nitride heterostructures
, 2006 We model generation and propagation of coherent acoustic phonons in piezoelectric InGaN/GaN multi-quantum wells embedded in a \textit{pin} diode structure and compute the time resolved reflectivity signal in simulated pump-probe experiments. Carriers are
C. J. Stanton +8 more
core +1 more source
Relationship between ae signal strength and absolute energy in determining damage classification of concrete structures [PDF]
, 2006 The most efficient tools in real monitoring system is acoustic emission (AE). This technique can be used to identify the damage classifications in RC structure.
Abdullah, Siti Radziah +2 more
core +2 more sources
Stacking‐Engineered Magnonic Topology and Transport in Honeycomb Homobilayers
Advanced Functional Materials, EarlyView.ABSTRACT Topological magnons have emerged as a promising platform for dissipationless bosonic transport. However, a straightforward and effective strategy to engineer such topological states in real materials has yet to be fully realized. Here, a general scheme for controlling magnonic topological states via stacking engineering in van der Waals ...
Xiaoran Feng +6 more
wiley +1 more source
Cross-Database Micro-Expression Recognition Based on a Dual-Stream Convolutional Neural Network
IEEE Access, 2022 Cross-database micro-expression recognition (CDMER) is a difficult task, where the target (testing) and source (training) samples come from different micro-expression (ME) databases, resulting in the inconsistency of the feature distributions between ...
Baolin Song +5 more
doaj +1 more source
Observations of High Frequency, Long Range Acoustic Propagation in a Harbor Environment [PDF]
, 2008 The positioning and navigation of AUV\u27s in harbor environments using underwater acoustics is complicated by shallow waters, long propagation distances, and complex oceanographic features.
Mayer, Larry A. +2 more
core +1 more source
Advanced Functional Materials, EarlyView.Covalent organic frameworks (COFs) with metals have been recognized as versatile platforms for photocatalytic CO2 reduction (CO2PRR). Herein, an overview of metal integration strategies for COFs is systematically summarized. Regulatory mechanisms and structure–activity relationships between metal integration and COF‐based CO2PRR are emphasized.
Jie He +5 more
wiley +1 more source
Widely Linear Adaptive Instantaneous Frequency Estimation in Vector Hydrophones
Sensors, 2018 To solve the problem that the time-frequency resolution of Short-Time Fourier Transform (STFT) is constrained by the window length and the moving step of the short time window, and to utilize the merits of a widely linear method, a novel instantaneous ...
Panpan Peng, Liang An
doaj +1 more source
Joint model-based recognition and localization of overlapped acoustic events using a set of distributed small microphone arrays [PDF]
, 2017 In the analysis of acoustic scenes, often the occurring sounds have to be detected in time, recognized, and localized in space. Usually, each of these tasks is done separately.
Chakraborty, Rupayan, Nadeu, Climent
core +2 more sources
Study of the acoustic signature of UHE neutrino interactions in water and ice
, 2009 The production of acoustic signals from the interactions of ultra-high energy (UHE) cosmic ray neutrinos in water and ice has been studied. A new computationally fast and efficient method of deriving the signal is presented.
A. Brown +26 more
core +1 more source
VLSI implementation of an energy-aware wake-up detector for an acoustic surveillance sensor network [PDF]
, 2006 We present a low-power VLSI wake-up detector for a sensor network that uses acoustic signals to localize ground-base vehicles. The detection criterion is the degree of low-frequency periodicity in the acoustic signal, and the periodicity is computed from
Andreou, Andreas +5 more
core +1 more source