Results 91 to 100 of about 9,530,789 (257)

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

An Improved Detecting Algorithm of Moving Targets for Airborne Maritime Surveillance Radar

Sensors
The traditional method is capable of detecting and tracking stationary and slow-moving targets in a sea surface environment. However, the signal focusing capability of such a method could be greatly reduced especially for those variable-speed targets. To
Zhefeng Wu, Gang Zhang, Xinchun Wang, Peng Sun, Yanchao Lin   +4 more
doaj   +1 more source

Structural Power Composites Based on High Mass Loading Zn‐Ion Hybrid Supercapacitors with Metal Mesh Current Collectors and Aramid Nanofiber/Glass Fiber Composite Electrolytes

Advanced Functional Materials, EarlyView.
A multifunctional structural power composite is developed by integrating high‐mass‐loading Zn‐ion hybrid supercapacitors with metal mesh current collectors and aramid nanofiber‐based composite electrolytes, enabling simultaneous load‐bearing capability and enhanced areal energy storage.
Yuseung Choi, Gilyong Shin, Hoyeon Lee, Eun Jae Nam, Byeong Jun So, Sungryul Yun, Fu‐Kuo Chang, Jei Gyeong Jeon, Tae June Kang   +8 more
wiley   +1 more source

Fiber‐reinforced Liquid Metal Composites With Automated Circuit Fabrication for Structurally‐Integrated Power Transfer

Advanced Functional Materials, EarlyView.
Fiber‐reinforced liquid metal composites (FibRe LMCs) are introduced that combine GPa‐scale structural performance with digitally programmable electrical conductivity. Through automated CNC activation, conductive pathways and wireless power transfer circuits are fabricated directly within load‐bearing composites, enabling structurally integrated ...
John Joyce, Charles K. Van Horn, Nathaniel J. Valentin, Angelica Phan, Michael D. Bartlett, Edward J. Barron III   +5 more
wiley   +1 more source

Multilateral-Jets Interaction on Hypersonic Missiles: A Numerical Investigation

International Journal of Aerospace Engineering
This paper numerically investigates flow field interaction and aerodynamic interference characteristics of multilateral-jets on hypersonic missiles. Three-dimensional compressible RANS equations coupled with the SST k-ω turbulence model are solved using ...
Zhao Sun, Haiyang Meng, Guangshan Chen
doaj   +1 more source

A 5 kW Near-Single-Mode Oscillating–Amplifying Fiber Laser Employing a Broadband Output Coupler with Simultaneous Raman Suppression and Spectral Narrowing

Photonics
In this work, we propose and demonstrate a novel approach to suppressing stimulated Raman scattering in an oscillating–amplifying integrated fiber laser (OAIFL) by changing the spectral bandwidth of the output-coupler fiber Bragg gratings (OC-FBGs).
Jiazheng Wu, Miao Yu, Yi Cao, Shiqi Jiang, Shihao Sun, Junlong Wang   +5 more
doaj   +1 more source

Coordinated Architectural and Chemical Reinforcement in the Crushing Mandible of a Soldier Termite

Advanced Functional Materials, EarlyView.
The crushing mandible of a soldier termite withstands substantial biting loads despite lacking mineral. Its cuticle is partitioned: convex teeth pair hardness and zinc enrichment with aligned chitin fibers for contact durability, while stiffer concave regions between teeth carry bending loads.
Andrew Tran Nguyen, Patryk Wąsik, Juan Fernando Cucuyame Morales, Marie Kate Palau, Adrian Francisco Duran Ornelas, Phani Saketh Dasika, Jin Hee Kim, Radhika Laxminarayana, Eric Hintsala, Greta Chang, Junzhi Liao, Lizhi Sun, Nathan Lord, Atsushi Arakaki, Paul Bardunias, Pablo Zavattieri, David Kisailus   +16 more
wiley   +1 more source

Distributed Fiber Optic Sensor for Accurate Liquid Level Monitoring Based on Optical Frequency Domain Reflectometry

Advanced Devices & Instrumentation
This study presents a highly accurate liquid level monitoring system utilizing optical frequency domain reflectometry (OFDR). The proposed system detects environmental characteristics along the length of the optical fiber and determines liquid levels in ...
Ying Mei, Xuefeng Wang, Yong Yang, Xiaojun Yang, Xuechao Tian, Rui Du   +5 more
doaj   +1 more source

Optimal Control and Applications to Aerospace: Some Results and Challenges [PDF]

Journal of Optimization Theory and Applications, 2012
This article surveys the classical techniques of nonlinear optimal control such as the Pontryagin Maximum Principle and the conjugate point theory, and how they can be implemented numerically, with a special focus on applications to aerospace problems. In practice the knowledge resulting from the maximum principle is often insufficient for solving the ...
openaire   +3 more sources

Infrared inspection of composite-reinforced concrete structures

, 2001
"October 2001."; "Aerospace report no. ATR-2002(7596)-1."; Includes bibliographical references (p. 17).; Final report.; Performed by the Aerospace Corporation Engineering and Technology Group for Ohio Dept.
Nokes, James Phillip., Aerospace Corporation. Engineering and Technology Group.   +1 more
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