Results 51 to 60 of about 136,601 (340)

Exploiting the Functionality of Cerium Oxide‐Modified Carbon Nanohorns Catalysts Toward Enhanced CO2 Reduction Performance

Advanced Functional Materials, EarlyView.
A cerium oxide‐carbon nanohybrid catalyst is synthesized via two distinct routes and is integrated into H‐type cells and gas diffusion layers (GDLs) to enhance electrochemical performance. Structural variations significantly affect performance, with the solvothermal sample exhibiting higher current densities.
Alessia Pollice, Michele Cacioppo, Miriam Marchi, Miriam Moro, Francesco Paolucci, Marcella Bonchio, Maurizio Prato, Giovanni Valenti, Michele Melchionna, Paolo Fornasiero   +9 more
wiley   +1 more source

Photonics-based real-time ultra-high-range-resolution radar with broadband signal generation and processing

Scientific Reports, 2017
Real-time and high-resolution target detection is highly desirable in modern radar applications. Electronic techniques have encountered grave difficulties in the development of such radars, which strictly rely on a large instantaneous bandwidth.
Fangzheng Zhang, Qingshui Guo, Shilong Pan   +2 more
doaj   +1 more source

Imaging ionospheric inhomogeneities using spaceborne synthetic aperture radar [PDF]

, 2011
We present a technique and results of 2-D imaging of Faraday rotation and total electron content using spaceborne L band polarimetric synthetic aperture radar (PolSAR).
Chapman, B., Freeman, A., Li, Z., Pi, X., Rosen, P.   +4 more
core   +2 more sources

High‐Density Boron Nitride Nanotube Composites via Surfactant‐Stabilized Lyotropic Liquid Crystals for Enhanced Space Radiation Shielding

Advanced Functional Materials, EarlyView.
High‐density BNNT films, enabling mechanical robustness and high space radiation shielding effectiveness, are fabricated using surfactant‐stabilized BNNT liquid crystal. Simulations indicate that a 50 g cm−2 BNNT film can reduce radiation exposure by 56% compared to zero shielding, potentially doubling the duration of astronaut missions on the lunar ...
Young‐Kyeong Kim, Ik Jae Lim, Hongjin Lim, Yongbi Joo, Jueun Park, Md Monir Hossain, Hyunjin Cho, Nam‐Ho You, Seokhoon Ahn, Hunsu Lee, Sang Seok Lee, Yongho Joo, Se Youn Moon, Hee Il Yoo, Calista Lum, Cheol Park, Siyoung Q. Choi, Se Gyu Jang   +17 more
wiley   +1 more source

Joint Transmit Power and Dwell Time Allocation for Multitarget Tracking in Radar Networks under Spectral Coexistence

Leida xuebao, 2023
For the resource allocation problem of multitarget tracking in a spectral coexistence environment, this study proposes a joint transmit power and dwell time allocation algorithm for radar networks.
Chenguang SHI, Jing DONG, Jianjiang ZHOU
doaj   +1 more source

Numerical study on signatures of atmospheric convective cells in radar images of the ocean

, 1999
Current and wind variations at the ocean surface can give rise to a modulation of the sea surface roughness and thus become visible in radar images. The discrimination between radar signatures of oceanic and atmospheric phenomena can be quite difficult ...
Alpers, Alpers, Alpers, Mitnik, Roland Romeiser, Romeiser, Romeiser, Susanne Ufermann, Thompson, Thomson, Trump, Ufermann, Valenzuela, Wright   +13 more
core   +1 more source

Single‐Step Electrochemical Battery Recycling

Advanced Functional Materials, EarlyView.
This work demonstrates the use of single‐step recovery, an electrochemical process combining electrodeposition and electro‐dissolution, to recover lithiated transition metal oxides (LTMOs). The batteries produced through this recycling method perform similarly to batteries made from pristine materials.
Jarom G. Sederholm, Arghya Patra, Zheng Liu, Jr‐Wen Lin, Carlos Juarez‐Yescas, Pingfeng Wang, Paul V. Braun   +6 more
wiley   +1 more source

Gaussian‐Sigmoid Reinforcement Transistors: Resolving Exploration‐Exploitation Trade‐Off Through Gate Voltage‐Controlled Activation Functions

Advanced Functional Materials, EarlyView.
The characteristics of a vertical n–p–i–p heterostructure transistor device, which exhibits a voltage‐tunable transition between Gaussian and sigmoid functions, are investigated. The mixed state of the transfer curve enables the utilization of both exploitation and exploration, improving computational performance in reinforcement learning tasks ...
Jisoo Park, Juhyung Seo, Ryun‐Han Koo, Dinithi Jayasuriya, Nethmi Jayasinghe, Wonjun Shin, Amit R. Trivedi, Hocheon Yoo   +7 more
wiley   +1 more source

Multiantenna GPS-Over-Fiber System for Attitude Determination Using Phase-Derived Range Measurement

IEEE Photonics Journal, 2019
A multiantenna global positioning system over fiber (GPS-over-fiber) system with real-time line bias monitoring is proposed for attitude determination of vehicles.
Xiangchuan Wang, Xin Jiang, Shupeng Li, Shilong Pan   +3 more
doaj   +1 more source

Sector imaging radar for enhanced vision [PDF]

Aerospace Science and Technology, 2003
Summary: SIREV (sector imaging radar for enhanced vision) is an innovative airborne radar system which can supply high-quality images in any desired direction under almost every weather condition. In contrast to synthetic aperture radar systems, no relative motion between sensor and targets is required in SIREV.
Krieger, Gerhard, Mittermayer, Josef, Buckreuss, Stefan, Wendler, Michael, Sutor, Thomas, Witte, Franz, Moreira, Alberto   +6 more
openaire   +2 more sources