Results 91 to 100 of about 8,757,591 (356)
Indoor Radar Cross Section Measurements of Simple Targets
Journal of Aerospace Technology and Management, 2012 This paper has described the radar absorbing materials characterization and radar cross section measurements, in the frequency range of 8 to 12 GHz, using a very simple setup.
Marcelo Alexandre Souza Miacci +4 more
doaj +1 more source
A knowledge-based geometry repair system for robust parametric CAD models [PDF]
, 2007 In modern multi-objective design optimization (MDO) an effective geometry engine is becoming an essential tool and its performance has a significant impact on the entire MDO process.
Li, D., Sobester, A., Keane, A.J.
core +5 more sources
Multi‐Wavelength Achromatic 3D Meta‐holography with Zoom Function
Advanced Science, EarlyView.Due to the wavelength mismatch, chromatic aberrations are inevitable in multi‐wavelength meta‐holography. Moreover, since the meta‐hologram is difficult to be refreshed, zoom meta‐holography has not been reported to date. This study proposes a multi‐wavelength achromatic 3D meta‐holography with a zoom function, breaking through both the chromatic ...
Chao Liu +17 more
wiley +1 more source
Deterministic Iteratively Built KD-Tree with KNN Search for Exact Applications [PDF]
arXiv, 2021 K-Nearest Neighbors (KNN) search is a fundamental algorithm in artificial intelligence software with applications in robotics, and autonomous vehicles. These wide-ranging applications utilize KNN either directly for simple classification or combine KNN results as input to other algorithms such as Locally Weighted Learning (LWL). Similar to binary trees,
arxiv
Towards the noise reduction of piezoelectrical-driven synthetic jet actuators [PDF]
, 2014 This paper details an experimental investigation aimed at reducing the noise output of piezoelectrical-driven synthetic jet actuators without compromising peak jet velocity.
Anderson D. F. +18 more
core +1 more source
Unusual Thermal Transport in Few‐Layer Van der Waals Antiferromagnet CrOCl
Advanced Science, EarlyView.Thermal transport serves as an ultra‐sensitive probe for detecting the magnetic order in 2D materials. Using the suspended thermal bridge method enhanced by Wheatstone bridges, it is, for the first time, observed anomalous critical behavior in few‐layer CrOCl near its Néel temperature.
Yu Yang +10 more
wiley +1 more source
Modelling the Dynamics of Potentially Dangerous Large-Earth Impactors [PDF]
arXiv, 2021 Collisional threats posed by Near-Earth Objects (NEOs) are increasingly being confirmed by National Aeronautics and Space Administration (NASA) and European Space Agency (ESA) sky surveys. Efforts to develop tools to perform modelling, analysis and prediction of possible future impact events are ongoing.
arxiv
Experimental Flow Investigation of a Truncated Ideal Contour Nozzle [PDF]
, 2006 Various tests showed a significant side load peak for low nozzle pressure ratios during engine start-up and shut down phase. DLR Lampoldshausen carried out tests to examine the flow field in a truncated ideal contour nozzle for low NPR.
Stark, Ralf, Wagner, Bernd
core +1 more source
Advanced Science, EarlyView.With 5G and AI robotics rising, electromagnetic radiation risks signal security and health. This work investigates the electromagnetic wave absorption of Co/CNF composites via in situ and ex situ electrospinning strategies. The in situ synthesized sample exhibits superior absorption properties due to enhanced structural uniformity, improved Co ...
Xinhui Cao +9 more
wiley +1 more source
Needs assessment of gossamer structures in communications platform end-of-life disposal [PDF]
, 2013 The use of a gossamer structure is considered in application to end-of-life disposal of communications platforms. A wide-ranging survey of end-of-life disposal techniques and strategies is presented for comparison against a gossamer structure prior to a ...
Bewick, Charlotte +2 more
core +1 more source