Results 51 to 60 of about 993,247 (318)

Rational Tuning of Hygroscopic Oscillation of Stacked Nanoflake Assemblies for Continuous Ambient Energy Harvesting

Advanced Materials, EarlyView.
Stacked nanoflake assembly (SNA) membranes can oscillate autonomously, offering opportunities for soft actuation and energy harvesting. This work uncovers the physical mechanism behind the sustained oscillation of SNA membranes in gradient humidity and identifies three governing dimensionless parameters, enabling rational design for optimizing SNA ...
Zijing Zhang, Jimin Fu, Gesa Zhang, Zhihua Liang, Boxun Zhang, Haimin Yao   +5 more
wiley   +1 more source

Anti-multipath interference method of semi-active seek

The Journal of Engineering, 2019
Multipath interference is the main factor which has influence in super-low-altitude detection. Aiming at solving the problem of detection for super-low-altitude target, anti-multipath methods under concrete environment are studied here.
Gui Long Tian, Chuang Ming Tong, Hao Liu, Zheng Guo Long, Jiang Jun Wang   +4 more
doaj   +1 more source

Robust Tracking for Small Target Groups With Dynamic Outlines

IEEE Access, 2020
Low altitude small target group has the special motion characteristics of orderly as a whole and flexibly as individuals. The performances of traditional target tracking algorithms (such as centroid tracking, geometric centre tracking, etc.) decrease ...
Chao Zhou, Rui Wang, Cheng Hu
doaj   +1 more source

Utilizing Ground-Based LIDAR Measurements to Aid Autonomous Airdrop Systems

, 2017
Uncertainty in atmospheric winds represents one of the primary sources of landing error in airdrop systems. In this work, a ground-based LIDAR system samples the wind field at discrete points above the target and transmits real-time data to approaching ...
Cacan, Martin, Costello, Mark, Scheuermann, Edward, Slegers, Nathan, Ward, Michael   +4 more
core   +1 more source

Multiobjective Codesign Optimization of a Planar Pneumatic Artificial Muscle‐Based Snake‐Like Robot for Enhanced Agility and Energy Efficiency

Advanced Robotics Research, EarlyView.
A codesign multiobjective optimization framework was developed to enhance the morphology and controller of a snake‐like robot driven by artificial muscles. It improved planar locomotion, agility, and power efficiency. The approach optimized link geometry and controller gains, revealing that shorter muscles near joints and longer linkages maximize ...
Ayla Valles, Mahdi Haghshenas‐Jaryani
wiley   +1 more source

Overactive alerting attention function in immigrants to high-altitude Tibet

Stress and Brain, 2021
The present study combined the attention network test and event-related potential approaches to investigate the neurocognitive expression of resource reduction on attention function as a result of long-term high-altitude exposure in immigrants of Tibet ...
Hailin Ma, Xinjuan Zhang, Yan Wang, Huifang Ma, Yahua Cheng, Feng Zhang, Ming Liu, Delong Zhang   +7 more
doaj   +1 more source

Interferometric locating system [PDF]

, 1980
A system is described for determining the position of a vehicle or other target that emits radio waves and which is of the type that senses the difference in time of arrival at spaced ground stations of signals from the vehicle to locate the vehicle on a
Macdoran, P. F.
core   +1 more source

Collision‐Resilient Winged Drones Enabled by Tensegrity Structures

Advanced Robotics Research, EarlyView.
Based on structures of birds such as the woodpeck, this article presents the collision‐resilient aerial robot, SWIFT. SWIFT leverages tensegrity structures in the fuselage and wings which allow it to undergo large deformations in a crash, without sustaining damage. Experiments show that SWIFT can reduce impact forces by 70% over conventional structures.
Omar Aloui, Raphael Zufferey, William Stewart, Mohammad Askari, Simon Jeger, Dario Floreano   +5 more
wiley   +1 more source

Low-thrust trajectories design for the European Student Moon Orbiter mission [PDF]

, 2007
The following paper presents the mission analysis studies performed for the phase A of the solar electric propulsion option of the European Student Moon Orbiter (ESMO) mission. ESMO is scheduled to be launched in 2011, as an auxiliary payload on board of
Colombo, Camilla, Heiligers, Jeannette, Novak, Daniel   +2 more
core  

Light‐Driven Quadrupedal Walking Biohybrid Robot With Antagonistic Muscle‐Rings and Inclined Joints

Advanced Robotics Research, EarlyView.
This work presents a light‐driven quadrupedal walking biohybrid robot powered by antagonistic muscle‐rings that achieve alternating walking gait. Optical training improved reproducibility of cultured muscle tissues, while caffeine treatment enhanced contractile force.
Shotaro Saito, Byeongwook Jo, Tomohiro Morita, Shota Noda, Minghao Nie, Shoji Takeuchi   +5 more
wiley   +1 more source