Results 131 to 140 of about 3,558 (256)

New views of some invariants associated with the Cartesian 2D velocity gradient tensor

Quarterly Journal of the Royal Meteorological Society, EarlyView.
Vorticity and divergence of horizontal flow are fundamental quantities in meteorology; both are linear functions of the four elements of the 2D velocity gradient tensor and both are formally unchanged under coordinate rotation. We explore four quadratic functions of the elements that are geometrically invariant in this sense, finding some novel ...
I. Roulstone, S. A. Clough, A. A. White
wiley   +1 more source

Scaling turbulence drives the general circulation

Quarterly Journal of the Royal Meteorological Society, EarlyView.
The NOAA Gulfstream SP4, which deployed the GPS dropsondes over the NE Pacific Ocean as part of the Winter Storms Project during the January–March periods of 2004, 2005 and 2006. Abstract Statistical multifractal analysis of airborne and dropsonde observations is used to show that persistence of velocity after molecular collisions breaks the continuous
Adrian F. Tuck
wiley   +1 more source

Formation Control With Obstacle Avoidance of Underwater Swarms Based on Relative Visual Feedback

Journal of Field Robotics, EarlyView.
ABSTRACT Underwater multi‐robot and swarm systems require advanced methodologies for controlling collective behavior. Conventional single‐robot techniques, such as tethering, sonar imaging, and acoustic localization, are not scalable or effective for swarm applications.
Andrea Infanti, Saverio Iacoponi, Saif Alameri, Mohamed El Hanbaly, Mohammed Tarnini, Cesare Stefanini, Giulia De Masi, Federico Renda   +7 more
wiley   +1 more source

Key Technical Fields and Future Outlooks of Space Manipulators: A Survey

SmartBot, EarlyView.
This paper systematically reviews the technological development of space manipulators, emphasizing the unique challenges posed by space environments. It examines four areas: structural design, modeling, planning, and control, while introducing typical ground test platforms.
Gang Chen, Zeyuan Huang, Ying Yan, Xiaokang An, Zhikai Zhao, Jirong Lin, Xiangrong Zhao, Xianyuan Gao, Junyi Zong, Xuewen Jia, Zhipeng Yao, Jianliang Liao, Ning Ji   +12 more
wiley   +1 more source

A note on a Vizing's generalized conjecture [PDF]

Opuscula Mathematica, 2007
In this note we give a generalized version of Vizing's conjecture concerning the distance domination number for the cartesian product of two graphs.
Mostafa Blidia, Mustapha Chellali
doaj  

RNA‐DNA Fusomer Fibers With Customizable Physicochemical, Mechanical, and Biological Properties for Next‐Generation Therapeutics

Small, EarlyView.
ABSTRACT We introduce RNA‐DNA fusomers, a new class of chemically synthesized oligonucleotides that combine the versatile properties of RNA and DNA within a single sequence and self‐assemble into higher‐order functional structures via a simple one‐pot annealing reaction.
Yasmine Radwan, Laura P. Rebolledo, Yelixza I. Avila, Elizabeth Skelly, Lauren Rackley, Julio Navas Hernandez, Renata de Freitas Saito, Laxmi K. Pandey, Hemani Chhabra, Alexander J. Lushnikov, Tatiane Katsue Furuya, Ana Luiza Lomba, Da Shi, Edward Cedrone, Ian Marriott, Morgan R. Chandler, Meni Wanunu, Aleksei Aksimentiev, Alexey V. Krasnoslobodtsev, Roger Chammas, Marina A. Dobrovolskaia, Kirill A. Afonin   +21 more
wiley   +1 more source

Explicit Formulas for the Complexity of Networks Produced by New Duplicating Corona and Cartesian Product

Journal of Mathematics
One important algebraic invariant in networks is complexity. This invariant ensures the accuracy and dependability of the network. In this paper, we employ a combinatorial approach to determine the graph’s complexity. A fundamental set of building blocks
Mohamed R. Zeen El Deen, Walaa A. Aboamer, Hamed M. El-Sherbiny   +2 more
doaj   +1 more source

APTNet: A Condition‐Sensitive Modulation Framework for Surface Pressure Prediction on Supersonic Aircraft

CAAI Transactions on Intelligence Technology, EarlyView.
ABSTRACT Accurate surface‐pressure prediction over broad operating envelopes is critical for supersonic aerodynamic analysis and design. To overcome the bottlenecks of traditional computational fluid dynamics (CFD) in real‐time performance and computational efficiency, data‐driven deep learning methods have emerged. However, existing data‐driven models
Hongbin Xu, Yin Long, Junlin Wu
wiley   +1 more source

Distributed k‐WTA Network for Multi‐Manipulator Competition With Experimental Verifications

CAAI Transactions on Intelligence Technology, EarlyView.
ABSTRACT In this article, a new distributed k $k$‐winner‐take‐all (Dk $k$‐WTA) network is designed and used to construct a dynamic allocation scheme for competitive coordination tasks of multiple manipulators as embodied agents. The scheme is constructed based on the following two aspects. On one hand, with reference to a perspective that the Laplacian
Shengkai Sun, Yutong Li, Jianfeng Lv
wiley   +1 more source

Measurements and scaling of X‐ray total scattering from single crystals

Journal of Applied Crystallography, EarlyView.
A measurement protocol and data reduction workflow are presented for obtaining single‐crystal X‐ray total‐scattering datasets on an absolute scale, capturing both Bragg and diffuse intensities from the same dataset. The study demonstrates consistency between scale factors derived from Bragg refinements and from spherical integration of the total ...
Semën Gorfman, Maksim Eremenko, Victor Krayzman, Alexei Bosak, Peter Y. Zavalij, Igor Levin   +5 more
wiley   +1 more source