Results 31 to 40 of about 1,828,077 (252)

Estimation of 3D vegetation structure from waveform and discrete return airborne laser scanning data [PDF]

, 2012
This study presents and compares new methods to describe the 3D canopy structure with Airborne Laser Scanning (ALS) waveform data as well as ALS point data.
Olofsson, Kenneth,, Lindberg, Eva,, Sveriges lantbruksuniversitet., Olsson, Håkan,, Kenneth Olofsson, Holmgren, Johan,, Håkan Olsson, Johan Holmgren, Olofsson, Kenneth, Lindberg, Eva, Holmgren, Johan, Eva Lindberg, Olsson, Håkan   +12 more
core   +1 more source

Strong Lead‐Free Bioinspired Piezoceramics for Durable Energy Transducers

Advanced Functional Materials, EarlyView.
We fabricated brick‐and‐mortar lead‐free piezoceramics with Bi0.5Na0.5TiO3 monocrystal platelets as bricks and amorphous silica as mortar. The alignment of the bricks and the presence of the amorphous silica led to anisotropic residual stresses. These residual stresses increase the samples toughness, strength and durability while the brick alignment ...
Ruxue Yang, Temesgen Tadeyos Zate, Peiren Wang, Soumyajit Mojumder, Elo Overgaard Mogensen, Oriol Gavalda‐Diaz, Zihe Li, Shitong Zhou, Ajeet Kumar, James Roscow, Hamideh Khanbareh, Astri Bjørnetun Haugen, Florian Bouville   +12 more
wiley   +1 more source

Colocated MIMO Radar Waveform-Array Joint Optimization for Sparse Array

Sensors, 2023
Colocated multiple-input multiple-output (MIMO) radar can transmit a group of distinct waveforms via its colocated transmit antennas and the waveform diversity leads to several advantages in contrast to conventional phased-array radar.
Jinrong Yin, Rui Ma, Mingcong Lin, Shenghua Zhou   +3 more
doaj   +1 more source

Functionalizing Micro‐to‐Mesoscopic Electrode Architectures for Regulating Electron Transfer Behaviors in Electrocatalysis

Advanced Functional Materials, EarlyView.
A systematic review is conducted to assess the influence of electrode architecture across micro‐ to mesoscopic length scales on electron‐transfer pathways in electrocatalysis. We discuss the structure‐activity relationships in electrocatalytic applications, including resource recovery and environmental remediation, and provide cost‐effective, efficient
Manshu Zhao, Jiaojiao Zhang, Shideng Yuan, Xinmeng Yu, Keming Wan, Xiaoguang Duan, Zhining Wang   +6 more
wiley   +1 more source

SAR Waveform Diversity Using PN-Sequence and Its Optimization With Genetic Algorithm

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
Waveform diversity is an important technique to suppress range ambiguities and extend the observation coverage of synthetic aperture radar (SAR) without sacrificing spatial resolution and power consumption.
Raito Suzuki, Akira Hirose, Ryo Natsuaki
doaj   +1 more source

DOA estimation method for multi-path targets based on TR MIMO radar

The Journal of Engineering, 2019
To reduce the large errors for direction of arrival (DOA) estimation in the multipath condition, a DOA estimation method for multipath targets based on time reversal (TR) multi-input multi-output (MIMO) radar is proposed.
Meng-bo Liu, Guo-ping Hu, Guo-ping Hu, Jun-peng Shi, Hao Zhou   +4 more
doaj   +1 more source

Atom Probe Tomography as an Emerging Tool for Understanding Defect‑Driven Mechanisms in HfO2‑Based Ferroelectrics

Advanced Functional Materials, EarlyView.
This Perspective highlights atom probe tomography as a powerful tool for understanding the atomic‐scale defect chemistry in HfO2‐based ferroelectrics. 3D mapping of dopants, point defects, and interface chemistry can provide new insight into defect‐driven mechanisms underpinning the ferroelectricity in the system and guide the design of more reliable ...
Kasper Hunnestad, Catherine Dubourdieu, Alexei Gruverman, Dennis Meier   +3 more
wiley   +1 more source

Waveform Modelling for the Laser Interferometer Space Antenna [PDF]

LISA, the Laser Interferometer Space Antenna, will usher in a new era ingravitational-wave astronomy. As the first anticipated space-basedgravitational-wave detector, it will expand our view to the millihertzgravitational-wave sky, where a spectacular ...
Witek, H., Helfer, T., Markakis, C., Gabella, W., Faye, G., Wachter, J., Bozzola, G., Sberna, L., García-Bellido, J., Pan, Z., Hannam, M., Laguna, P., O'Shaughnessy, R., Maggio, E., Kidder, L., Bonga, B., Leather, B., Mourier, P., Spiers, A., Kavanagh, C., Field, S., Yang, H., Ferguson, D., Lukes-Gerakopoulos, G., Paschalidis, V., Isoyama, S., Seoane, P., Rüter, H., Tamanini, N., Lim, H., Antonelli, A., Pfeiffer, H., Dhesi, M., Shoemaker, D., Chua, A., Zilhão, M., Husa, S., Benkel, R., Maselli, A., Durkan, L., Hinderer, T., Neilsen, D., Sundar, H., Pound, A., Vernieri, D., Warburton, N., Küchler, L., Lovelace, G., Bernard, L., Pappas, G., Barausse, E., Buonanno, A., Casals, M., Hughes, S., Upton, S., Green, S., Clough, K., Katz, M., Akçay, S., Thompson, J., Gerosa, D., Nagar, A., Lousto, C., Wardell, B., Pratten, G., Mathews, J., Ruiz, M., Mandel, I., Shapiro, S., O'Toole, C., Littenberg, T., Novák, J., Lynch, P., Tsokaros, A., Pompili, L., Afshordi, N., Chernoff, D., Brito, R., Larrouturou, F., Tiec, A., Barack, L., Haney, M., Nichols, D., Bonetti, M., Witzany, V., Okounkova, M., Colleoni, M., Toubiana, A., Druart, A., van de Meent, M., Aurrekoetxea, J., Gracia-Linares, M., Khanna, G., Oshita, N., Long, O., Berti, E., Bernuzzi, S., Korol, V., Macedo, R., Pani, P., Lim, E., Sam, Z., Cárdenas-Avendanõ, A., Heffernan, A., Sopuerta, C.   +104 more
core   +1 more source

Cognitive radar for waveform diversity utilization

, 2021
S.218-223In this paper we discuss the relationship between cognitive radar and waveform diversity. The cognitive decision-making process selects the most appropriate waveform from the available set of diverse waveforms based on a perception of the ...
Martone, Anthony F., Charlish, Alexander, Alexander Charlish, Anthony F. Martone   +3 more
core   +1 more source

A Multi-target Detection Method for Distributed MIMO Radar Based on Reinforcement Learning

Leida xuebao
Reinforcement Learning (RL) is a critical approach for enabling cognitive radar target detection. Existing studies primarily focus on detection methods for centralized Multiple-Input Multiple-Output (MIMO) radar, which are limited to a single observation
Xijie WU, Tianpeng LIU, Yongxiang LIU, Li LIU   +3 more
doaj   +1 more source