Results 51 to 60 of about 2,944,878 (288)

Construction of a High-Quality Digital Elevation Model of the Amundsen Crater and Landing Area Selection for Future Lunar Missions

open access: yesIEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
The Amundsen crater is located in the Aitken Basin of the lunar nearside. Its unique location and the possibility of water ice make it a prime landing area for lunar exploration missions.
Yingjun Zheng   +5 more
doaj   +1 more source

Electrochemical Behavior of Flame‐Sprayed Sc‐Doped AlCoCrFeMo High‐Entropy Alloy Coatings in 3.5% Sodium Chloride Solution

open access: yesAdvanced Engineering Materials, EarlyView.
Scandium (Sc)‐doped AlCoCrFeMo HEA coatings are fabricated via flame spraying with 0.1, 0.3, and 0.5 wt% Sc additions. Among these, the HEA‐Sc0.3 coating exhibits the highest corrosion resistance, indicated by a more positive corrosion potential and lower current density.
Pankaj Kumar   +7 more
wiley   +1 more source

Recent Development of Drone Technology Software Engineering: A Systematic Survey

open access: yesIEEE Access
The drone technology field has received attention and witnessed numerous impressive advancements that heralded substantial changes and opened new possibilities in different industries.
Ngoc-Bao-van Le   +3 more
doaj   +1 more source

Adaptive Foam 3D Printing of Ultralight and Multifunctional Materials

open access: yesAdvanced Engineering Materials, EarlyView.
Adaptive foam 3D printing, enabled by expandable microspheres, imparts cellular structures to thermoplastic and thermosetting polymers, manufactured through a variety of processes including fused filament fabrication, direct ink writing, digital light processing, and inkjet printing.
Nariman Rajabifar, Amir Ameli
wiley   +1 more source

Selection of Lunar South Pole Landing Site Based on Constructing and Analyzing Fuzzy Cognitive Maps

open access: yesRemote Sensing, 2022
The Permanently Shadowed Regions (PSRs) of the lunar south pole have never been directly sampled. To explore and discover lunar resources, the Chinese lunar south pole exploration mission is scheduled to land in direct sunlight near the PSR, where ...
Yutong Jia   +4 more
doaj   +1 more source

Landing site selection for UAV forced landings using machine vision [PDF]

open access: yes, 2007
A forced landing for an Unmanned Aerial Vehicle (UAV) is required if there is an emergency on board that requires the aircraft to land immediately. Piloted aircraft in the same scenario have a human on board that is able to engage in the complex decision
Fitzgerald, Daniel Liam
core  

Enhancing Low‐Temperature Performance of Sodium‐Ion Batteries via Anion‐Solvent Interactions

open access: yesAdvanced Functional Materials, EarlyView.
DOL is introduced into electrolytes as a co‐solvent, increasing slat solubility, ion conductivity, and the de‐solvent process, and forming an anion‐rich solvent shell due to its high interaction with anion. With the above virtues, the batteries using this electrolyte exhibit excellent cycling stability at low temperatures. Abstract Sodium‐ion batteries
Cheng Zheng   +7 more
wiley   +1 more source

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

open access: yesAdvanced 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   +6 more
wiley   +1 more source

Morphometric Properties of the CP-21 Landing Site on the Moon at Mons Gruithuisen Gamma

open access: yesThe Planetary Science Journal
Characterizing terrain surface properties is an essential step in assessing the feasibility of landing successfully at a location on a planetary surface.
Jean-Pierre Williams   +15 more
doaj   +1 more source

Unmanned Aerial Vehicle Landing on Rugged Terrain by On-Board LIDAR–Camera Positioning System

open access: yesApplied Sciences
Safely landing unmanned aerial vehicles (UAVs) in unknown environments that are denied by GPS is challenging but crucial. In most cases, traditional landing methods are not suitable, especially under complex terrain conditions with insufficient map ...
Cheng Zou, Yezhen Sun, Linghua Kong
doaj   +1 more source

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