Results 71 to 80 of about 9,794,287 (242)

Detection of low-altitude infrared small targets for UAVs using a density-based artificial bee colony algorithm

Scientific Reports
The objective of this paper is to address the issue of the inadequate detection accuracy of UAVs operating at low-altitudes in conditions of weak thermal signals.
Haixia Wang, Hailong Wang, Fen Han
doaj   +1 more source

Numerical Simulation of the Plant Shelterbelt Configuration Based on Porous Media Model

Atmosphere
Low-coverage line-belt-pattern protective forests offer significant advantages in terms of wind and sand control measures. It is important to study the windbreak effectiveness of sand-fixing forests with different spacing for the construction and ...
Yuhao Zhao, Ning Huang, Jialiang Sun, Kejie Zhan, Xuanmin Li, Bin Han, Jie Zhang   +6 more
doaj   +1 more source

Data‐Driven Bulldozer Blade Control for Autonomous Terrain Leveling

Advanced Robotics Research, EarlyView.
A simulation‐driven framework for autonomous bulldozer leveling is presented, combining high‐fidelity terramechanics simulation with a neural‐network‐based reduced‐order model. Gradient‐based optimization enables efficient, low‐level blade control that balances leveling quality and operation time.
Harry Zhang, Ganesh Arivoli, Huzaifa Unjhawala, Luning Bakke, Radu Serban, Dan Negrut   +5 more
wiley   +1 more source

Research and application of supporting technologies for improving success rate of water injection well testing

Youqicang pingjia yu kaifa, 2023
To address the challenges of test instrument obstruction and the suboptimal deployment of concentric stratified water injection in the Subei complex fracture block oilfields, an innovative approach involving the use of a hollow rod for pipe cleaning was ...
XU Guochen, LIU Xiaowen
doaj  

3D‐Printing Aided Rapid Prototyping of Pretensioned Tensegrity Structures for Robotic Applications

Advanced Robotics Research, EarlyView.
Printing, injection molding, and assembly (PMA) is a method for rapid prototyping mesoscale, topologically complex, and tensioned tensegrity structures. In combination with PMA method, two mold design strategies: modular mold and compact channel layout, enable efficiency and scalability for tensegrity fabrication.
Yi Sun, Jan Petrš, Omar Aloui, Dario Floreano   +3 more
wiley   +1 more source

The Bet-Hedging Strategies for Seedling Emergence of Calligonum mongolicum to Adapt to the Extreme Desert Environments in Northwestern China

Frontiers in Plant Science, 2018
Calligonum mongolicum is a dominant native perennial shrub on sand dunes in arid deserts of northwestern China, and is therefore widely used in sand dune stabilization in these regions.
Baoli Fan, Baoli Fan, Yongfeng Zhou, Yongfeng Zhou, Quanlin Ma, Qiushi Yu, Changming Zhao, Kun Sun   +7 more
doaj   +1 more source

Experimental Study on the Backflow Mechanism of Proppants in Induced Fractures and Fiber Sand Control Under the Condition of Large-Scale and Fully Measurable Flow Field. [PDF]

ACS Omega, 2023
Chen Y, Sang Y, Guo J, Yang J, Chen W, Tang B, Feng F, Gou X, Zhang Y.   +8 more
europepmc   +1 more source

Strategic assessment of the magnitude and impacts of sand mining in Poyang Lake, China [PDF]

, 2010
Planning for the extraction of aggregates is typically dealt with at a case to case basis, without assessing environmental impacts strategically. In this study we assess the impact of sand mining in Poyang Lake, where dredging began in 2001 after sand ...
Wu, G., Shankman, D., Burnham, J., Yesou, H., Xiao, J., Leeuw, J., de, He, Q., Boer, W.F., de   +7 more
core   +1 more source

Systematic Exploration of 3D Concrete Printing Parameters for Conformal Printing on Sloped Surfaces

Advanced Robotics Research, EarlyView.
A conformal slicing algorithm is developed for robotic 3D concrete printing (3DCP) on sloped surfaces as a first step toward printing slab‐on‐grade foundations on uneven terrain. Systematic experiments quantify the effects of nozzle speed, extrusion rate, and toolpath direction on filament dimension and stability.
Paniz Farrokhsiar, Benay Gursoy, Jose Pinto Duarte   +2 more
wiley   +1 more source

Development and Performance Evaluation of an Intelligent Sand Control Screen Based on Polyphenylene Sulfide. [PDF]

ACS Omega, 2022
Sun Y, Sun D, Zhao Y, Gao Y, Li C, Dai X, Wang Y, Cheng Y.   +7 more
europepmc   +1 more source