• Publications
  • Influence
Finite-time Analysis of the Multiarmed Bandit Problem
TLDR
We show that the optimal logarithmic regret is also achievable uniformly over time, with simple and efficient policies, and for all reward distributions with bounded support. Expand
  • 4,341
  • 969
  • PDF
Interactions of a stationary finite-sized particle with wall turbulence
Reliable information on forces on a finite-sized particle in a turbulent boundary layer is lacking, so workers continue to use standard drag and lift correlations developed for a laminar flow toExpand
  • 62
  • 7
Geophysical-astrophysical spectral-element adaptive refinement (GASpAR): Object-oriented h-adaptive fluid dynamics simulation
TLDR
We present an object-oriented geophysical and astrophysical spectral-element adaptive refinement (GASpAR) code for application to turbulent flows. Expand
  • 48
  • 2
  • PDF
Why is MPI so slow?: analyzing the fundamental limits in implementing MPI-3.1
TLDR
We present a highly optimized implementation of the MPI standard in which the communication stack---all the way from the application to the low-level network communication API---takes only a few tens of instructions. Expand
  • 16
  • 2
  • PDF
A performance analysis of ensemble averaging for high fidelity turbulence simulations at the strong scaling limit
TLDR
We analyze the potential performance benefits of estimating expected quantities in large eddy simulations of turbulent flows using true ensembles rather than ergodic time averaging. Expand
  • 4
  • 2
Scalability of high-performance PDE solvers
TLDR
We explore performance and space-time trade-offs for important compute-intensive kernels of large-scale numerical solvers for partial differential equations (PDEs) that govern a wide range of physical applications. Expand
  • 12
  • 1
  • PDF
The CBM Collaboration
N. Abel 21, J. Adamczewski 12, D. Adamova 45, M.M. Aggarwal 10, N. Ahmad 2, Z. Ahmad 30, A. Akindinov 36, P. Akishin 16, E. Akishina 16, T. Akishina 16, M. Al-Turany 12, M. Alyushin 39, S.Expand
  • 24
  • 1
A novel numerical treatment of the near-wall regions in the k−ω class of RANS models
Abstract In this paper, we discuss a novel approach to modeling the near-wall region in the class of k − ω models. The proposed methodology obviates the need for ad hoc boundary conditions of ω onExpand
  • 8
  • 1
Algorithms for large-scale parallel simulation of unsteady incompressible flows in three-dimensional complex geometries
We develop a fast direct solver for parallel solution of "coarse grid" problems, Ax = b, such as arise when domain decomposition or multigrid methods are applied to elliptic partial differentialExpand
  • 9
  • PDF
Noise-tolerant learning near the information-theoretic bound
TLDR
We prove the first nontrivial sample complexity lower bound in this model by showing that order of &/A2 + d/A examples are necessary for PAC learning any target class of {O, 1}-valued functions of VC dimension d. Expand
  • 5