Results 31 to 40 of about 1,964,359 (279)

The Design of a Multifunctional Coding Transmitarray with Independent Manipulation of the Polarization States

open access: yesMicromachines
Manipulating orthogonally polarized waves independently in a single metasurface is pivotal. However, independently controlling the phase shifts of orthogonally polarized waves is difficult, especially in the same frequency bands.
Shunlan Zhang   +4 more
doaj   +1 more source

Air‐Pressure–Actuated Vibroacoustic Metamaterial With Tunable Bandgap: Design, Modeling, and Characterization

open access: yesAdvanced Engineering Materials, EarlyView.
This article presents the design, modeling, and characterization of air‐pressure–actuated programmable vibroacoustic metamaterials (PVAMM). The study focuses on leveraging air pressure to dynamically tune resonance frequencies for effective noise attenuation.
William Kaal   +2 more
wiley   +1 more source

Classification and Identification Method of Communication Radiation Source Feature Based on Softmax Regression [PDF]

open access: yesJisuanji gongcheng, 2018
According to the characteristics of the current communication source identification method needs not only the higher number of samples,and identification efficiency is low,recognition rate drop,this paper proposes a Softmax regression was applied to ...
LIU Yachong,TANG Zhiling
doaj  

High‐Resolution Corrosion Fingerprinting of Alloy Libraries via Microdroplet Spectroelectrochemistry

open access: yesAdvanced Engineering Materials, EarlyView.
Ionic‐liquid microdroplet spectroelectrochemistry enables stable, localized electrochemical measurements over extended timescales. By coupling impedance spectroscopy, wetting analysis, finite‐element simulations, and operando Raman spectroscopy, it disentangles geometrical and electrochemical effects, opening new opportunities for rapid corrosion ...
Ekaterina Kurchavova   +3 more
wiley   +1 more source

Bio‐Inspired Synthesis of Macroporous Single Crystal Particles as Scattering Agents

open access: yesAdvanced Functional Materials, EarlyView.
A general strategy is presented that delivers unique, single‐crystal microparticles that combine submicron macroporosity and uniform particle shapes. A bioinspired approach is used to occlude three distinct types of additives – polystyrene microspheres, polymer vesicles and amino acids – within calcite single crystals, and subsequent thermal annealing ...
Stephanie E. Foster   +11 more
wiley   +1 more source

Design of a Digital Array Signal Processing System with Full Array Element

open access: yesRemote Sensing, 2023
For the application of a digital array signal processing system with a high sampling rate and large bandwidth, and considering the constraints of limited resources (performance, volume, power consumption, weight, etc.), this paper proposes a design and ...
Guoyao Xiao   +4 more
doaj   +1 more source

Desert Plant Inspired Hierarchical Nanofibrous Membranes for Integrated Solar Desalination and Heavy Metal Remediation

open access: yesAdvanced Functional Materials, EarlyView.
An Alhagi maurorum inspired hierarchical composite membrane (NFCu) was developed by integrating heavy metal remediation and solar‐driven interfacial evaporation in a single platform. Beyond the photothermal effect, a localized photocatalytic process is realized on the CuO surface, deepening the mechanistic understanding of light–matter–water ...
Yuqiong He   +9 more
wiley   +1 more source

Energy-Efficient De-Duplication Mechanism for Healthcare Data Aggregation in IoT

open access: yesFuture Internet
The rapid development of the Internet of Things (IoT) has opened the way for transformative advances in numerous fields, including healthcare. IoT-based healthcare systems provide unprecedented opportunities to gather patients’ real-time data and make ...
Muhammad Nafees Ulfat Khan   +4 more
doaj   +1 more source

ORTHOGONAL NOISE-LIKE SIGNAL SYMBOLS FOR BROADBAND CHANNEL PROTECTION [PDF]

open access: yesНаучно-технический вестник информационных технологий, механики и оптики, 2019
The paper deals with development and analysis of particular case in a complex protection for a channel where radio messages are exchanged on the basis of mutually orthogonal signal broadband characters and alphabets based on them.
A. Y. Grishentsev   +3 more
doaj   +1 more source

Sub‐1 ms Optoelectronic Synapse Based on {ZnCdO/ZnO} Multilayer Structure for High‐Speed Neuromorphic Vision Systems

open access: yesAdvanced Functional Materials, EarlyView.
Eu‐doped {ZnCdO/ZnO} structures grown on Si are developed, showcasing dual‐functionality controlled by europium doping. While high europium concentration transforms the device into an ultrafast, self‐powered photodetector, low‐doped structures can be used as an optoelectronic synapse.
Igor Perlikowski   +3 more
wiley   +1 more source

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