Results 91 to 100 of about 43,865 (324)

High‐Power Terahertz Emission from Picosecond Nano‐Plasma Switching Driven by Secondary Electron Emission Avalanche

Advanced Science, EarlyView.
A nano‐plasma device enables watt‐level on‐chip THz generation through picosecond switching triggered by secondary electron emission avalanche. An ultra‐dense electron sheet initiates nano‐plasma formation within a ∼100 nm gap, driving rapid energy release into an integrated resonator.
Guangyu Sun, Mohammad Rezaei, Yuheng Hu, Guan‐Jun Zhang, Elison Matioli   +4 more
wiley   +1 more source

A pseudo-matched filter for chaos

, 2012
A matched filter maximizes the signal-to-noise ratio of a signal. In the recent work of Corron et al. [Chaos 20, 023123 (2010)], a matched filter is derived for the chaotic waveforms produced by a piecewise-linear system.
Cohen, Seth D., Gauthier, Daniel J.
core   +1 more source

Ultrabroadband and Highly Sensitive Short‐Wave Infrared Molecular Fingerprinting via Acoustic MXene Plasmons

Advanced Science, EarlyView.
Acoustic plasmons in Ti3C2Tx MXene strongly compress infrared electromagnetic fields and enhance light–matter interactions at the nanoscale. This platform couples broadband plasmon excitations with molecular vibrations, enabling simultaneous sensing of high‐ and low‐frequency vibrational modes in ultrathin PMMA and graphene oxide films, and extending ...
Changhoon Park, Jisung Kwon, Nu‐Ri Park, Hyerim Kim, Hyeju Kim, Yury Gogotsi, Chong Min Koo, Myung‐Ki Kim   +7 more
wiley   +1 more source

Broadband Signal Measurement Method in the Background of Power Electronics in Substation Area of Distribution Network

IEEE Access
With the development and application of power electronic devices in distribution stations, the power grid has frequent broadband oscillations, with characteristics such as a wide frequency range and multiple modal components, etc.
Lina Liu, Tao Wang, Ruichao Li, Kun Liu, Xiaojun Li, Ming Qu, Fangshuo Li   +6 more
doaj   +1 more source

Time lagged ordinal partition networks for capturing dynamics of continuous dynamical systems

, 2015
We investigate a generalised version of the recently proposed ordinal partition time series to network transformation algorithm. Firstly we introduce a fixed time lag for the elements of each partition that is selected using techniques from traditional ...
Iu, Herbert Ho-Ching, McCullough, Michael, Small, Michael, Stemler, Thomas   +3 more
core   +1 more source

Helical Electron Beam Micro‐Bunching by High‐Order Modes in a Micro‐Plasma Waveguide

Advanced Science, EarlyView.
ABSTRACT Electron acceleration by a high‐power Laguerre‐Gaussian pulse in a micro‐plasma waveguide is investigated. When the incident laser travels in the waveguide, electrons on the wall are extracted into the vacuum core and accelerated by the longitudinal field of the waveguide mode.
Xingju Guo, Longqing Yi
wiley   +1 more source

A Review of Data-Model Hybrid-Driven Early Warning Research for Wideband Oscillation Risks in Power Systems

Applied Sciences
The problem of power system oscillation stability has become more and more prominent in the context of a high proportion of new energy sources and the gradual increase in power electronic devices.
Hong Fan, Mingze Sun
doaj   +1 more source

Tunable High‐Performance Metamaterial Filters Based on Novel SRR Architectures

Advanced Science, EarlyView.
Based on two novel SRR configurations and two independent SRR integration approaches, four tunable bandpass metamaterial filters were fabricated with an ultra‐thin ceramic substrate. Among them, SM‐2 achieves over 97% electromagnetic wave transmittance, with a minimal 1.15% deviation in its resonant frequency prediction, making them promising ...
Lingxi Qu, Liya Zheng, Ruopeng Liu, Chunlin Ji, Bin Li   +4 more
wiley   +1 more source

Probing Steady‐State Carrier Properties and Charge Transport in Covalent Organic Framework by Frequency‐Domain Terahertz Spectroscopy

Angewandte Chemie, EarlyView.
This work reports a combined frequency‐domain and time‐domain terahertz (THz) spectroscopic approach to elucidate intrinsic carrier properties and transport mechanisms in framework materials over the extended 0.5–20 THz region. Subtle structural and chemical variations are shown to strongly influence THz charge‐transport behavior across the far ...
Satyapriya Nath, Saiprakash Rout, Mahalaxmi Samal, Snehal Haldankar, Md Habib Ahsan, Anol Mondal, Sudeep Tiwari, Adithyan Puthukkudi, Avani KV, Ashis K. Nandy, Shriganesh S. Prabhu, Himansu S. Biswal, Xinliang Feng, Bishnu P. Biswal   +13 more
wiley   +2 more sources

MHD waves in sunspots

, 2015
The review addresses the spatial frequency morphology of sources of sunspot oscillations and waves, including their localization, size, oscillation periods, height localization with the mechanism of cut-off frequency that forms the observed emission ...
Abramov-Maximov, Bakunina, Balthasar, Balthasar, Balthasar, Beckers, Bel, Bellot Rubio, Bloomfield, Bogdan, Borrero, Botha, Braun, Brković, Brynildsen, Bárta, Cally, Cally, Centeno, Centeno, Chandra, Chen, Christopoulou, Christopoulou, Christopoulou, De Moortel, De Moortel, De Moortel, De Pontieu, De Pontieu, de Wijn, Dudík, Felipe, Finsterle, Fleck, Fludra, Fontenla, Gelfreikh, Gelfreikh, Harrison, Heggland, Heggland, Jain, Jefferies, Jess, Jess, Kalkofen, Karlicky, Khomenko, Khomenko, Khomenko, Kim, Kobanov, Kobanov, Kobanov, Kobanov, Kobanov, Kobanov, Kobanov, Kolobov, Kuridze, Lin, Lites, Lites, Lites, Liu, Maltby, Marsh, McIntosh, Merkulenko, Moradi, Nagashima, Nakariakov, Nakariakov, Nicholas, Nindos, Norman, Norton, Odstrcil, Parchevsky, Rae, Rendtel, Reznikova, Reznikova, Reznikova, Roberts, Rosenthal, Schunker, Settele, Shibasaki, Sigwarth, Sobotka, Srivastava, Srivastava, Srivastava, Staude, Suematsu, Sutmann, Sych, Sych, Sych, Sych, Sych, Sych, Taroyan, Thomas, Tziotziou, Tziotziou, Ulmschneider, Wang, Yuan, Yuan, Yuan, Zaitsev, Zandanov, Zandanov, Zandanov, Zhugzhda, Zhugzhda, Zhugzhda, Zhugzhda, Zhugzhda, Zhugzhda, Zhugzhda, Zuccarello   +124 more
core   +1 more source