Results 21 to 30 of about 12,502,488 (286)

Suppressing Heavy Metal Leaching through Ball Milling of Fly Ash

open access: yesEnergies, 2016
Ball milling is investigated as a method of reducing the leaching concentration (often termed stablilization) of heavy metals in municipal solid waste incineration (MSWI) fly ash. Three heavy metals (Cu, Cr, Pb) loose much of their solubility in leachate
Zhiliang Chen   +6 more
doaj   +3 more sources

Linearly convergent stochastic heavy ball method for minimizing generalization error

open access: yesCoRR, 2017
NIPS 2017, Workshop on Optimization for Machine Learning (camera ready version)
Nicolas Loizou, Peter Richtárik
openaire   +3 more sources

Heavy-Ball Momentum Method in Continuous Time and Discretization Error Analysis

open access: yesCoRR
This paper establishes a continuous time approximation, a piece-wise continuous differential equation, for the discrete Heavy-Ball (HB) momentum method with explicit discretization error.
Bochen Lyu   +5 more
semanticscholar   +5 more sources

Adaptive Heavy-Ball Momentum Method Based on AdaGrad+ and Its Optimal Individual Convergence [PDF]

open access: yesJisuanji kexue, 2023
Adaptive strategies and momentum methods are commonly used to improve the performance of optimization algorithms.Most of the adaptive gradient methods use the AdaGrad-type strategy at present.The AdaGrad+ method,which is more suitable for dealing with ...
WEI Hongxu, LONG Sheng, TAO Wei, TAO Qing
doaj   +1 more source

Hybrid Heavy-Ball Systems: Reset Methods for Optimization with Uncertainty [PDF]

open access: yes2021 American Control Conference (ACC), 2021
Momentum methods for convex optimization often rely on precise choices of algorithmic parameters, based on knowledge of problem parameters, in order to achieve fast convergence, as well as to prevent oscillations that could severely restrict applications of these algorithms to cyber-physical systems.
Justin H. Le, Andrew R. Teel
openaire   +2 more sources

Heavy-Ball-Based Hard Thresholding Pursuit for Sparse Phase Retrieval Problems

open access: yesMathematics, 2023
We introduce a novel iterative algorithm, termed the Heavy-Ball-Based Hard Thresholding Pursuit for sparse phase retrieval problem (SPR-HBHTP), to reconstruct a sparse signal from a small number of magnitude-only measurements.
Yingying Li   +3 more
doaj   +1 more source

A Study of Diagnostic Signatures of a Deep Groove Ball Bearing Based on a Nonlinear Dynamic Mode [PDF]

open access: yes, 2015
For accurate fault detection and diagnosis, this paper focuses on the study of bearing vibration responses under increasing radial clearances due to investable wear and different bearing grades.
Gu, Fengshou   +8 more
core   +4 more sources

Calcium-Mechanochemistry Enabled Ketone Synthesis From Organic Iodides and Carboxylic Acids. [PDF]

open access: yesAdv Sci (Weinh)
Mechanochemically generated organocalcium species display unusual chemoselectivity toward carboxylates, enabling direct ketone synthesis without overaddition. Ball milling activates commercial calcium metal under ambient, solvent‐minimized conditions, providing a broad substrate scope, high functional‐group tolerance, and a practical one‐step ...
Pei M   +9 more
europepmc   +2 more sources

Tracking the soccer ball using multiple fixed cameras [PDF]

open access: yes, 2008
This paper demonstrates innovative techniques for estimating the trajectory of a soccer ball from multiple fixed cameras. Since the ball is nearly always moving and frequently occluded, its size and shape appearance varies over time and between cameras ...
Orwell, James   +10 more
core   +4 more sources

On the Convergence of Bregman ADMM With Variational Inequality

open access: yesIEEE Access, 2020
The alternating direction method of multipliers (ADMM) is one of most foundational algorithms for linear constrained composite minimization problems. For different specific problems, variations of ADMM (like linearized ADMM, proximal ADMM) are developed.
Peibing Du, Hao Jiang
doaj   +1 more source

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