Results 21 to 30 of about 139,427 (216)

Avalanche statistics and time-resolved grain dynamics for a driven heap [PDF]

, 2007
We probe the dynamics of intermittent avalanches caused by steady addition of grains to a quasi-two dimensional heap. To characterize the time-dependent average avalanche flow speed v(t), we image the top free surface.
A. R. Abate, D. A. Weitz, D. J. Durian, D. V. Khakhar, G. D. R. MiDi, G. Maret, H. Katsuragi, J. Duran, R. J. Adrian   +8 more
core   +4 more sources

Geometrically-exact time-integration mesh-free schemes for advection-diffusion problems derived from optimal transportation theory and their connection with particle methods [PDF]

, 2017
We develop an Optimal Transportation Meshfree (OTM) particle method for advection-diffusion in which the concentration or density of the diffusive species is approximated by Dirac measures.
Arroyo, Benson, Bompadre, Bompadre, Brenier, Cavalli, Chen, Daneri, Evans, Jordan, Jordan, Jordan, Kane, Knott, Lew, Lew, Li, Lisini, Liu, Lucy, Marsden, Monaghan, Sulsky, Villani, Zhang   +24 more
core   +3 more sources

Dynamics of non-neutral plasmas [PDF]

, 1995
In this paper the focus is on the dynamics of two-dimensional cylindrical non-neutral plasmas. After reviewing some highlights of the non-neutral plasma dynamics, some recent two-dimensional results are described: vortex dynamics, diocotron instabilities
Gould, Roy W.
core   +1 more source

A Unified Successive Pseudo-Convex Approximation Framework [PDF]

, 2016
In this paper, we propose a successive pseudo-convex approximation algorithm to efficiently compute stationary points for a large class of possibly nonconvex optimization problems.
Pesavento, Marius, Yang, Yang
core   +2 more sources

Study on the peak shaving operation of cascade hydropower stations based on the plant-wide optimal curve

International Journal of Electrical Power & Energy Systems
A large number of renewable energy sources (RESs), such as wind and photovoltaics (PV), have increased the importance of hydropower stations with regulating capacity in peak shaving operation.
Fengshuo Liu, Kui Huang, Xuanyu Shi, Longqing Zhao, Yangxin Yu, Xueshan Ai, Xiang Fu   +6 more
doaj   +1 more source

Order-of-magnitude speedup for steady states and traveling waves via Stokes preconditioning in Channelflow and Openpipeflow

, 2018
Steady states and traveling waves play a fundamental role in understanding hydrodynamic problems. Even when unstable, these states provide the bifurcation-theoretic explanation for the origin of the observed states. In turbulent wall-bounded shear flows,
A Alonso, A Alonso, A Alonso, A Bergeon, A Bergeon, A Bergeon, A Bergeon, A Bergeon, A Bergeon, AP Willis, AR Champneys, B Dale, B Eckhardt, C Beaume, C Beaume, C Beaume, C Beaume, C Beaume, C Beaume, C Huepe, C Huepe, C Nore, C Nore, CCT Pringle, CCT Pringle, CK Mamun, D Barkley, D Henry, D LoJacono, D LoJacono, D LoJacono, D LoJacono, D Viswanath, DA Knoll, E Chénier, E Meca, E Meca, F Feudel, F Feudel, F Feudel, F Feudel, F Marques, F Waleffe, F Waleffe, F Waleffe, F. MELLIBOVSKY, G Bardan, G Kawahara, G Kawahara, GLG Sleijpen, H Faisst, H Faisst, H Wedin, H. Vitoshkin, HA Vorst Van der, I Mercader, I Mercader, I Mercader, I Mercader, I Mercader, J Burke, J Sánchez, J Wang, JE Dennis Jr, JF Gibson, JF Gibson, JF Gibson, JF Torres, JF Torres, JF Torres, K Avila, K Bergemann, K Borońska, K Deguchi, L Shi, L Veen Van, LS Tuckerman, LS Tuckerman, LS Tuckerman, M Abid, M Avila, M Brynjell-Rahkola, M Chantry, M Nagata, M Nagata, MF Hilali, MH Gutknecht, O Batiste, O Batiste, O Daube, O Sánchez, P Assemat, P Assemat, P Coullet, P Cvitanovic, P Cvitanović, P Sonneveld, R Touihri, R Touihri, RE Lynch, RM Clever, RR Kerswell, S Fauve, S Xin, S Xin, S Xin, S Xin, TM Schneider, W Dridi, Y Duguet, Y Duguet, Y Pomeau, Y Saad   +112 more
core   +1 more source

Electrical and Kinetic Model of an Atmospheric RF Device for Plasma Aerodynamics Applications

, 2009
The asymmetrically mounted flat plasma actuator is studied using a self-consistent 2-DIM fluid model at atmospheric pressure. The computational model use the drift-diffusion approximation and a simple plasma phenomenological kinetic model.
Martins, Alexandre A., Pinheiro, Mario J.   +1 more
core   +1 more source

Performance Modelling and Optimisation of Multi-hop Networks [PDF]

, 2012
A major challenge in the design of large-scale networks is to predict and optimise the total time and energy consumption required to deliver a packet from a source node to a destination node.
Abdelrahman, Omer Hassan Omer, Abdelrahman, Omer Hassan Omer   +1 more
core   +1 more source

Large-Scale Convex Optimization for Ultra-Dense Cloud-RAN

, 2015
The heterogeneous cloud radio access network (Cloud-RAN) provides a revolutionary way to densify radio access networks. It enables centralized coordination and signal processing for efficient interference management and flexible network adaptation. Thus,
Bai, Bo, Chen, Wei, Letaief, Khaled B., Shi, Yuanming, Zhang, Jun   +4 more
core   +2 more sources

Acceleration time scale for the first-order Fermi acceleration in relativistic shock waves [PDF]

, 1996
The acceleration time scale for the process of first-order Fermi acceleration in relativistic shock waves with oblique magnetic field configurations is investigated by the method of Monte Carlo particle simulations.
Bednarz, J., Ostrowski, M.
core   +3 more sources