Results 31 to 40 of about 1,198,894 (281)
Journal of Marine Science and Engineering, 2022 A ship collision risk assessment model is an essential part of ship safety navigation. At present, the open water collision risk assessment model (such as the closest point of approach) is applied, but a ship collision risk model suitable for inland ...
Yan Wang +3 more
doaj +1 more source
On Segregative Behaviors Using Flocking and Velocity Obstacles [PDF]
, 2014 This paper presents a novel approach to swarm navigation that combines hierarchical abstractions, flocking behaviors, and an efficient collision avoidance mechanism. Our main objective is to keep large groups of robots segregated while safely navigating in a shared environment.
Vinicius Graciano Santos +2 more
openaire +1 more source
UAV dynamic obstacle avoidance based on improved reciprocal velocity obstacle
Journal of Physics: Conference Series, 2022 Abstract This paper aims to solve the problem that when the UAV flies from the starting point to the target point in the velocity space, the obstacle avoidance speed provided by the mutual velocity obstacle method will appear too large turning angle in order to avoid dynamic obstacles.
Jing Gao +3 more
openaire +1 more source
Three-dimensional formation flying using bifurcating potential fields [PDF]
, 2009 This paper describes the design of a three-dimensional formation flying guidance and control algorithm for a swarm of autonomous Unmanned Aerial Vehicles (UAVs), using the new approach of bifurcating artificial potential fields.
Uchiyama, Kenji +3 more
core +4 more sources
A trajectory planning method for the redundant manipulator based on configuration plane
International Journal of Advanced Robotic Systems, 2021 This study focuses on the method of trajectory planning of spatial obstacle avoidance for redundant manipulators based on configuration plane method.
Yanhui Wei +3 more
doaj +1 more source
Collision-Avoidance Decision System for Inland Ships Based on Velocity Obstacle Algorithms
Journal of Marine Science and Engineering, 2022 Due to the complex hydrology and narrow channels of inland rivers, ship collision accidents occur frequently. The traditional collision-avoidance algorithms are often aimed at sea areas, and not often at inland rivers. To solve the problem of inland-ship
Guangyu Zhang +4 more
doaj +1 more source
Influence of obstacles in coal mine roadways on smoke flow characteristics
Gong-kuang zidonghuaUnderground coal mine fires generate smoke that spreads along roadways, and its flow state is easily affected by internal obstacles, forming local smoke stagnation zones, increasing the accumulation risk of toxic gases, and seriously threatening the safe
WANG Binbin, QIU Haisheng, ZHOU Rui
doaj +1 more source
IEEE AccessThe steering behavior of autonomous agents in animation and games aims to form agent movement to navigate around a virtual world. Leader-following behavior is a steering behavior formed by followers who must follow their leader while the leader guides the group to their destination. Followers need to deter themself from crowding their leader as it will
Moch Fachri +2 more
openaire +3 more sources
Phase space structures generated by an absorbing obstacle in a streaming plasma [PDF]
, 2004 The dynamic behavior of an ion flow around an obstacle in a collisionless plasma is investigated. The obstacle consists here of an absorbing cylinder, and a 2 dimensional electrostatic particle-in-cell simulation is used to study the flow characteristics.
Guio, P, Pecseli, HL
core
GelMA‐based 3D spheroids recapitulate transcriptomic and functional hallmarks of myeloid sarcoma
FEBS Open Bio, EarlyView.GelMA 5% hydrogels support the formation of myeloid leukemia spheroids that recapitulate MS‐specific features, including G1 arrest, apoptosis, and ECM‐driven transcriptomic reprogramming. The 3D model mimicked soft‐tissue‐like stiffness and oxygen conditions, and transcriptomic convergence with primary MS samples confirmed its utility as a preclinical ...
Nicolas Germain +11 more
wiley +1 more source