Results 91 to 100 of about 133,899 (280)

Large‐Aperture Polarization‐Independent Broadband Achromatic All‐Dielectric Metalens for Terahertz Focusing

open access: yesAdvanced Science, EarlyView.
A large‐aperture, high focusing efficiency and polarization‐independent THz single‐layer achromatic metalens is reported via discrete multi‐wavelength achromatic design and global optimization algorithm. The fabricated metalens exhibits a largest diameter of 2.21 cm, excellent achromatic performance, extremely high average focusing efficiency (> 46 ...
Xiaoqiang Jiang   +7 more
wiley   +1 more source

Rapid trajectory planning of a reusable launch vehicle for airdrop with geographic constraints

open access: yesInternational Journal of Advanced Robotic Systems, 2019
Online feasible trajectory generation for an airdrop unpowered reusable launch vehicle is addressed in this article. A rapid trajectory planning algorithm is proposed to satisfy not only the multiple path and terminal constraints but also the complex ...
Xing Wei   +3 more
doaj   +1 more source

Drones: Innovative Technology for Use in Precision Pest Management. [PDF]

open access: yes, 2020
Arthropod pest outbreaks are unpredictable and not uniformly distributed within fields. Early outbreak detection and treatment application are inherent to effective pest management, allowing management decisions to be implemented before pests are well ...
de Lange, Elvira S   +3 more
core   +1 more source

Precise Tailoring 3D Printed In Situ Toughening Low‐k Microwave Transparent Structure via Thiol‐acrylate Chain Transfer Behavior

open access: yesAdvanced Science, EarlyView.
An in situ thiol–acrylate chain transfer‐mediated toughening strategy is introduced for Digital Light Processing (DLP) printing. Benefiting from its excellent printability, a printed gyroid lattice‐filled plate (100 µm wall thickness) achieves 92% transmittance at 10 GHz under a 50° incidence angle following structural optimization. ABSTRACT The unique
Ce Bian   +7 more
wiley   +1 more source

New Perspectives in Multispectral Sky Monitoring [PDF]

open access: yes, 2015
I give a short review and discussion of multispectral (optical and X–rays) sky ...
Hudec R.
core  

Multispectral principal component imaging

open access: yesOptics Express, 2003
We analyze a novel multispectral imager that directly measures the principal component features of an object. Optical feature extraction is studied for color face images, multi-spectral LANDSAT-7 images, and their grayscale equivalents. Blockwise feature extraction is performed that exploits both spatial and spectral correlation, with the goal of ...
Himadri, Pal, Mark, Neifeld
openaire   +2 more sources

NIRGB‐GS: Near‐Infrared Assisted Low‐Light Scene Reconstruction and Enhancement via Gaussian Splatting

open access: yesAdvanced Intelligent Systems, EarlyView.
This article proposes NIRGB‐GS, a multimodal 3DGS variant that enables reliable 3D reconstruction and normal‐light novel‐view synthesis for extremely low‐light scenes by fusing paired near‐infrared and noisy RGB captures. High‐SNR near‐infrared modality and modality‐specific appearance encoding together resolve the issues of unstable pose/geometry ...
Chengyun Yang   +3 more
wiley   +1 more source

Passivity Enhancement and Grid-Current Distortion Mitigation for Inverter-Side Current Controlled LCL-Type Grid-Connected Inverters

open access: yesIEEE Access
Inverter-side current (ISC) control has been widely used in LCL-type grid-connected inverters due to its cost-effectiveness. However, the ISC-controlled inverters suffer from instability and injected grid current distortion under weak grid conditions ...
Linguo Liu   +3 more
doaj   +1 more source

PERSIANN-MSA: A precipitation estimation method from satellite-based multispectral analysis [PDF]

open access: yes, 2009
Visible and infrared data obtained from instruments onboard geostationary satellites have been extensively used for monitoring clouds and their evolution.
Behrangi, A   +5 more
core   +1 more source

Multispectral Imaging

open access: yes
The research for this presentation was funded by the European Research Council (ERC) under ERC´s Advanced Grant funding scheme – 'The Development of Literacy in the Caucasian Territories' (DeLiCaTe), grant ID: 101019006. The research was conducted within the scope of the Centre for the Study of Manuscript Cultures (CSMC) at Universität Hamburg. Project
Bonfiglio, Emilio   +2 more
openaire   +2 more sources

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