Results 21 to 30 of about 1,153,600 (235)

Differential responses of soil C, N, and P ecological stoichiometric characteristics to different configurations of edge-locked forests in the Kubuqi Desert

Frontiers in Plant Science
As a vital component of the desert ecological protection system, the edge-locked forests of the Kubuqi Desert play a crucial role in mitigating wind erosion, stabilizing sand, maintaining soil and water, and restricting desert expansion.
Xue Chen, Hejun Zuo, Hejun Zuo, Min Yan, Min Yan, Haibing Wang, Haibing Wang, Cheng Xi, Yinchao Chai   +8 more
doaj   +1 more source

Synchronization Control of Dynamic Positioning Ships Using Model Predictive Control

Journal of Marine Science and Engineering, 2021
Underway replenishment is essential for ships performing long-term missions at sea, which can be formulated into the problem of leader-tracking configuration. Not only the position and orientation but also the velocities are required to be controlled for
Cheng Liu, Ting Sun, Qizhi Hu
doaj   +1 more source

Nanopositioning of a diamond nanocrystal containing a single NV defect center

, 2009
Precise control over the position of a single quantum object is important for many experiments in quantum science and nanotechnology. We report on a technique for high-accuracy positioning of individual diamond nanocrystals.
de Lange, G., Dmochowski, G. M., Hanson, R., Heeres, E. C., Oosterkamp, T. H., Robledo, L., van der Sar, T.   +6 more
core   +2 more sources

Model and Design of a Power Driver for Piezoelectric Stack Actuators [PDF]

, 2010
A power driver has been developed to control piezoelectric stack actuators used in automotive application. A FEM model of the actuator has been implemented starting from experimental characterization of the stack and mechanical and piezoelectric ...
Botto, Gianluca, Chiaberge, Marcello, De Giuseppe, M., Tonoli, Andrea   +3 more
core   +1 more source

Development of an Innovative Magnetorheological Gearbox for Positioning Control and Anti-Disturbance of a Robotic Arm

Machines
The robotic arm is a critical component of modern industrial manufacturing. However, its positioning performance can be hindered by overshooting and oscillation.
Yuyang Zhang, Shuaishuai Sun, Lei Deng, Guorui Wang, Rui Yu, Weihua Li, Xinglong Gong, Shiwu Zhang, Haiping Du, Jian Yang   +9 more
doaj   +1 more source

Ship Dynamic Positioning Control Based on Active Disturbance Rejection Control

Journal of Marine Science and Engineering, 2022
Nowadays, Dynamic Positioning (DP) is applied to various tasks such as subsea pipeline laying and the requirements for the positioning performance in marine operations are higher and higher.
Hongliang Li, Hao Chen, Ning Gao, Nadia AΪT-Ahmed, Jean-Frederic Charpentier, Mohamed Benbouzid   +5 more
doaj   +1 more source

Drag-free and attitude control for the GOCE satellite [PDF]

, 2008
The paper concerns Drag-Free and Attitude Control of the European satellite Gravity field and steady-state Ocean Circulation Explorer (GOCE) during the science phase.
Aguirre-Martinez, Bertotti, Canuto, Canuto, Canuto, Donati, Enrico Canuto, Fichter, Luenberger, Picone, Scheeres, Silvestrin, Touboul, Vaillon   +13 more
core   +1 more source

Analysis of open-loop characteristics on SISO sampled-data positioning control system

Journal of Advanced Mechanical Design, Systems, and Manufacturing, 2016
In the sampled-data positioning control system of mechatronic products, it is hard to analyze the effect of mechanical resonances above the Nyquist frequency after the control systems were assembled.
Takenori ATSUMI
doaj   +1 more source

The Trypanosoma brucei AIR9-like protein is cytoskeleton-associated and is required for nucleus positioning and accurate cleavage furrow placement [PDF]

, 2012
AIR9 is a cytoskeleton-associated protein in Arabidopsis thaliana with roles in cytokinesis and cross wall maturation, and reported homologues in land plants and excavate protists, including trypanosomatids.
Almeida Costa, Cristina, Gibson, Wendy, Hammarton, Tansy, May, Sophie, Peacock, Lori, Robinson, Derrick, Robinson, Derrick R, Tetley, Laurence   +7 more
core   +3 more sources

A Model-Free Adaptive Positioning Control Method for Underactuated Unmanned Surface Vessels in Unknown Ocean Currents

Journal of Marine Science and Engineering
Aiming to address the problem of underactuated unmanned surface vehicles (USVs) performing fixed-point operations at sea without dynamic positioning control systems, this paper introduces an original approach to positioning control: the virtual anchor ...
Zihe Qin, Feng Zhang, Wenlin Xu, Yu Chen, Jinyu Lei   +4 more
doaj   +1 more source