Results 71 to 80 of about 1,285,259 (263)

Application of Radar Image Fusion Method to Near-Field Sea Ice Warning for Autonomous Ships in the Polar Region

Journal of Marine Science and Engineering, 2022
Mastering the real-time dynamics of near-field sea ice is the primary condition to guaranteeing the navigation safety of autonomous ships in the polar region.
Tsung-Hsuan Hsieh, Bo Li, Shengzheng Wang, Wei Liu   +3 more
doaj   +1 more source

Position and Orientation Based Formation Control of Multiple Rigid Bodies with Collision Avoidance and Connectivity Maintenance

, 2017
This paper addresses the problem of position- and orientation-based formation control of a class of second-order nonlinear multi-agent systems in a $3$D workspace with obstacles.
Dimarogonas, Dimos V., Nikou, Alexandros, Verginis, Christos K.   +2 more
core   +1 more source

Robotic Tankette for Intelligent BioEnergy Agriculture: Design, Development and Field Tests [PDF]

, 2018
In recent years, the use of robots in agriculture has been increasing mainly due to the high demand of productivity, precision and efficiency, which follow the climate change effects and world population growth. Unlike conventional agriculture, sugarcane
Barbosa, Evelyn S., Faria, Henrique D., From, Pål J., Leite, Antonio C., Loureiro, Gabriel S. M., Xaud, Marco F. S.   +5 more
core   +2 more sources

Bilateral sacroiliac joint dislocation treated by posterior instrumentation case report and literature review

Archives of Trauma Research, 2019
Sacroiliac joint dislocation is an uncommon and potentially life-threatening injury secondary to high-energy trauma. Given that bilateral sacroiliac joint dislocation has rarely been reported, its management constitutes a clinical challenge.
Fernando Moreno Mateo, Rubén Hernández Ramajo, José María Trigueros Larrea, Silvia Santiago Maniega, Francisco Ardura Aragón, David César Noriega González   +5 more
doaj   +1 more source

Technical report on Optimization-Based Bearing-Only Visual Homing with Applications to a 2-D Unicycle Model [PDF]

, 2014
We consider the problem of bearing-based visual homing: Given a mobile robot which can measure bearing directions with respect to known landmarks, the goal is to guide the robot toward a desired "home" location.
Daniilidis, Kostas, Tron, Roberto
core   +1 more source

Digital spectral correlation method for measuring radio signal reception delay and direction finding

Технічна інженерія, 2021
A promising direction for the development of radio monitoring tools is the use of passive and semi-active radar stations to assess the air situation using the difference-rangefinder method. A digital high-speed spectral correlation method for determining
V.V. Tsyporenko, V.G. Tsyporenko, O.V. Andreiev, A.M. Sabibolda   +3 more
doaj   +1 more source

Navigation without localisation: reliable teach and repeat based on the convergence theorem

, 2018
We present a novel concept for teach-and-repeat visual navigation. The proposed concept is based on a mathematical model, which indicates that in teach-and-repeat navigation scenarios, mobile robots do not need to perform explicit localisation.
Halodova, Lucie, Krajnik, Tomas, Majer, Filip, Vintr, Tomas   +3 more
core   +1 more source

Fault Diagnosis of Water Lubricated Stern Bearing based on BP Neural Network

Jixie chuandong, 2015
The water lubricated stern bearing is a special bearings which widely used in ships and other water vessels sail propulsion system,because of its work environment is of great uncertainty,the product is prone to various of failures,once the failure ...
Liang Feng, Zhang Dandan, Zhang Ronghua
doaj  

The Application and Development of Static Pressure Air Floating in the Field of Micro-Low-Gravity Simulation Experiments for Spacecraft

Lubricants
The force conditions experienced by spacecraft and astronauts in space are vastly different from those in Earth’s gravitational environment, hence it is necessary to conduct adequate micro-low-gravity environment simulation tests on the ground before ...
Libin Zang, Weijie Hou, Lei Liu, Haixia Hu, Xingze Wang, Yong Jia, Yongbo Hao, Yuehua Li, Baoshan Zhao   +8 more
doaj   +1 more source

Perception and steering control in paired bat flight [PDF]

, 2014
Animals within groups need to coordinate their reactions to perceived environmental features and to each other in order to safely move from one point to another.
Baillieul, John, Betke, Magrit, Fuller, Nathan W., Kong, Zhaodan, Oezcimder, Kayhan, Theriault, Diane   +5 more
core   +1 more source