Results 251 to 260 of about 11,997,578 (311)
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A velocity field level set method for shape and topology optimization
International Journal for Numerical Methods in Engineering, 2018In this paper, we propose a new implementation of the level set shape and topology optimization, the velocity field level set method. Therein, the normal velocity field is constructed with specified basis functions and velocity design variables defined ...
Zhan Kang, Yaguang Wang
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Diffusion by a Random Velocity Field
The Physics of Fluids, 1970Single-particle diffusion in a multivariate-normal, incompressible, stationary, isotropic velocity field is calculated in two and three dimensions by computer simulation and by the direct-interaction approximation. The computer simulations are carried out by storing the velocity field as a set of Fourier components and synthesizing in physical space ...
R. Kraichnan
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Deep learning for fluid velocity field estimation: A review
Ocean Engineering, 2023Bi Xiaojun, Changdong Yu, Yi-Wei Fan
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, 2021
A meshless radial basis function (RBF) method combined with the modified Tikhonov regularization is proposed to reconstruct the two-dimensional velocity field.
Juqi Zhang +6 more
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A meshless radial basis function (RBF) method combined with the modified Tikhonov regularization is proposed to reconstruct the two-dimensional velocity field.
Juqi Zhang +6 more
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Superdiffusion in random velocity fields
Physical Review Letters, 1990We discuss the superdiffusive motion of a random walk in a medium containing random velocity fields. For a two-dimensional layered medium with y-dependent random velocities in the x direction u(y), 〈${\mathit{x}}^{2}$(t)〉\ensuremath{\sim}${\mathit{t}}^{2\ensuremath{\nu}}$, with 2\ensuremath{\nu}=3/2, and with strong sample-to-sample fluctuations.
, Bouchaud +4 more
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A robust velocity field control
IEEE Transactions on Control Systems Technology, 2002This paper is devoted to velocity field control (VFC) of uncertain robotic manipulators. We propose a proportional-integral (PI)-type controller derived from modeling error compensation ideas and singular perturbation theory, that requires a minimum knowledge of the plant (i.e., constant estimate of the inertia matrix).
Ilse Cervantes +3 more
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Extended passive velocity field control with variable velocity fields for a kneed biped
Advanced Robotics, 2001In this paper, two aspects for task specification and control of biped walking robot, i.e. (i) realization of safe control against human beings and the outside environment by utilizing a passive velocity field controller (PVFC), and (ii) energy-effective gait design based on virtual passive dynamic walking, are studied and a new control method is ...
Masaki Yamakita, Fumihiko Asano
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Environment and Planning A: Economy and Space, 1970
The city is not an undifferentiated terrain and travel does not occur along straight-line paths at constant velocities. Variations in travel velocities at different locations bend the minimum time paths away from regions of high congestion. This paper discusses a transformation of the urban plane into a time surface on which distance corresponds to ...
S. Angel, G.M. Hyman
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The city is not an undifferentiated terrain and travel does not occur along straight-line paths at constant velocities. Variations in travel velocities at different locations bend the minimum time paths away from regions of high congestion. This paper discusses a transformation of the urban plane into a time surface on which distance corresponds to ...
S. Angel, G.M. Hyman
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Ab Initio Velocity-Field Curves in Monoclinic \(\beta\)-Ga\textsubscript{2}O\textsubscript{3}}
, 2016We investigate the high-field transport in monoclinic β-Ga2O3 using a combination of ab initio calculations and full band Monte Carlo (FBMC) simulation.
Krishnendu Ghosh, U. Singisetti
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PhyloVelo enhances transcriptomic velocity field mapping using monotonically expressed genes
Nature Biotechnology, 2023Kun Wang +10 more
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