Results 71 to 80 of about 561,026 (203)

Multiband signal acquisition using improved modulated wideband converter

The Journal of Engineering, 2019
In this study, the authors stress the problem of sampling and recovering sparse wideband signals. A new methodology for sparse multiband signal acquisition using sinusoidal frequency modulation (SMF) multiplier‐based modulated wideband converter (MWC) is presented. The harmonic property of the SMF signals enables sparse multiband signal to be precisely
Changxin Cai, Fangqing Wen, Dongmei Huang   +2 more
openaire   +1 more source

Over 95% Optical Reflectance From Structurally Modulated All‐Biopolymer Multilayers

Advanced Materials, EarlyView.
A new dense–porous design turns ordinary polysaccharides into highly reflective photonic multilayers. Alternating dense pectin and porous cellulose nanofiber layers create strong refractive‐index contrast without inorganic or synthetic polymers, enabling nearly perfect visible reflection, high near‐infrared reflection, broadband metallic‐like colors ...
Takaaki Kasuga, Ami Mizui, Shun Ishioka, Yintong Huang, Yuto Kaku, Tsuguyuki Saito, Tatsuya Namba, Yohsuke Goi, Hirotaka Koga, Masaya Nogi   +9 more
wiley   +1 more source

Ultra-wideband radio signals distribution in FTTH networks [PDF]

, 2008
The use of an ultra-wideband (UWB) radio technique is proposed as a viable solution for the distribution of high-definition audio/video content in fiber-to-the-home (FTTH) networks.
Roberto Llorente, Marti, Javier, Alves, T., Morant, Maria, Beltran, M., Beltran, Marta, Maria Morant, Perez, J., Martí Sendra, Javier, Alves, Tiago, Llorente, Roberto, Cartaxo, A., Perez Soler, Joaquin, Cartaxo, Adolfo   +13 more
core   +1 more source

Conformal Coating and Transfer of 2D Nanomaterials via Dynamic Interface Engineering

Advanced Materials Interfaces, EarlyView.
This review discusses conformal coating and transfer of two‐dimensional (2D) nanomaterials with a focus on dynamic interface engineering. By actively regulating nanosheet transport and interfacial contact during film formation, recent dynamic coating strategies overcome the limitations of conventional passive approaches and enable geometry‐adaptive ...
Seungyeon Kim, Euihoon Jeong, Seoung‐Ki Lee, Sukang Bae, Tae‐Wook Kim   +4 more
wiley   +1 more source

Elimination Methods for High-Frequency Harmonics on the DC Side of Modular Multilevel Converters from the Perspective of Valve Control

Energies
Modular multilevel converter (MMC)-based HVDC systems have become one promising way to integrate a large amount of renewable energy. However, the high-frequency harmonics problem could seriously affect the safety and stable operation level of MMC-HVDCs ...
Qing Huai, Yirun Ji, Minxiang Yang, Ziyao Jie, Xi Yuan, Xiang Xu   +5 more
doaj   +1 more source

Culinary Chemistry as a Platform for Interfacial Materials Design

Advanced Materials Interfaces, EarlyView.
Culinary processes control interfaces through heating, shear, gelation, and molecular transport. This Review connects selected gastronomic examples with food‐derived nanomaterials, plasmonic sensing, anthocyanin photovoltaics, and intelligent packaging. Original agar‐based plasmonic films illustrate the proposed translation.
Josep Moreno, I. Brian Becerril‐Castro, Irene Calderon‐Gonzalez, Jaslyn Ru Ting Chen, Zhiming Wang, Alexander O. Govorov, José Manuel Romo‐Herrera, Neus Feliu, Wolfgang J. Parak, Miguel A. Correa‐Duarte, In Yee Phang, Xing Yi Ling, Ramón A. Alvarez‐Puebla   +12 more
wiley   +1 more source

Moisture‐Adaptive Triboelectric Materials and Platforms: Design Strategies, Performance Enhancement, and Applications in Energy Harvesting and Wearable Electronics

Advanced Materials Technologies, EarlyView.
This review summarizes moisture‐adaptive strategies that enable triboelectric nanogenerators (TENGs) to operate across diverse moisture conditions. It examines moisture‐management methods, including exclusion, directional transport, removal, and utilization, with charge‐regulation approaches based on interfacial, dielectric, and structural engineering.
Junzhe Gan, Zhao Sha, Xuehua Zhang, Hoang‐Phuong Phan, Jin Zhang   +4 more
wiley   +1 more source

A direct A.C. to A.C. regenerative frequency and voltage converter [PDF]

, 1980
Includes bibliographical references.The reliable variable speed operation of an a. c. machine over a wide speed range is a problem that has received attention for some time.
Case, Michael James
core   +1 more source

ATC-Tx: A 21.9 pJ/Sa 110 μW Direct Pixel-to-PWM Converter and Time-Domain Body Communication Transmitter for Video Sensor Nodes

IEEE Open Journal of the Solid-State Circuits Society
With the rapid advancement of the Internet of Things (IoT) and its expanding applications in health monitoring, body-worn cameras, and smart glasses, the demand for high data rate (DR) video transmission and compact device size has become critical.
Gourab Barik, Samyadip Sarkar, Baibhab Chatterjee, Gaurav K. Kumar, Shreyas Sen   +4 more
doaj   +1 more source

High‐Density Magnetomyography With Optical Magnetometers Reveals Spatiotemporal Patterns of Evoked Muscle Activity

Advanced Materials Technologies, EarlyView.
Optically pumped magnetometers are employed to contactlessly map the spatiotemporal dynamics of the magnetic field linked to electrical activity of a skeletal muscle in vivo. It is demonstrated that localization of the clinically relevant innervation zone is feasible using this non‐invasive magnetic measurement modality. ABSTRACT Magnetomyography (MMG)
Simon Nordenström, Victor Lebedev, Stefan Hartwig, Marlen Kruse, Santiago Rodriguez, Lukas Baier, Nima Noury, Thomas Klotz, Ahmet Doğukan Keleş, Justus Marquetand, Markus Siegel, Oliver Röhrle, Thomas Middelmann   +12 more
wiley   +1 more source