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The variance reduction class of algorithms including the representative ones, SVRG and SARAH, have well documented merits for empirical risk minimization problems. However, they require grid search to tune parameters (step size and the…

机器学习 · 计算机科学 2020-06-11 Bingcong Li , Lingda Wang , Georgios B. Giannakis

Parallel transmission has been a very promising candidate technology to mitigate the inevitable radio-frequency field inhomogeneity in magnetic resonance imaging (MRI) at ultra-high field (UHF). For the first few years, pulse design…

仪器与探测器 · 物理学 2013-11-06 Andres Hoyos Idrobo , Pierre Weiss , Aurélien Massire , Alexis Amadon , Nicolas Boulant

Selected mapping (SLM) is a suitable scheme, which can solve the peak-to-average power ratio (PAPR) problem. Recently, many researchers have concentrated on reducing the computational complexity of the SLM schemes. One of the low complexity…

信息论 · 计算机科学 2012-10-17 Jun-Young Woo , Hyun-Seung Joo , Kee-Hoon Kim , Jong-Seon No , Dong-Joon Shin

In methods like geminal-based approaches or coupled cluster that are solved using the projected Schr\"odinger equation, direct computation of the 2-electron reduced density matrix (2-RDM) is impractical and one falls back to a 2-RDM based…

For critical applications that require a higher level of reliability, the Triple Modular Redundancy (TMR) scheme is usually employed to implement fault-tolerant arithmetic units. However, this method imposes a significant area and…

硬件体系结构 · 计算机科学 2024-10-29 Jafar Vafaei , Omid Akbari

The spectral numerical mode-matching (SNMM) method is developed to simulate the 3D layered multi-region structures. The SNMM method is a semi-analytical solver having the properties of dimensionality reduction to reduce computational costs;…

光学 · 物理学 2019-07-10 Jie Liu , Na Liu , Qing Huo Liu

We study the problem of nonparametric regression when the regressor is endogenous, which is an important nonparametric instrumental variables (NPIV) regression in econometrics and a difficult ill-posed inverse problem with unknown operator…

统计理论 · 数学 2017-10-03 Xiaohong Chen , Timothy Christensen

In this paper, we develop a numerical method for the computation of (quasi-)resonances in spherical symmetric, heterogeneous Helmholtz problems with piecewise smooth refractive index. Our focus lies in resonances very close to the real…

数值分析 · 数学 2026-02-19 Bouchra Bensiali , Stefan Sauter

Training beam design for channel estimation with infinite-resolution and low-resolution phase shifters (PSs) in hybrid analog-digital milimeter wave (mmWave) massive multiple-input multiple-output (MIMO) systems is considered in this paper.…

信号处理 · 电气工程与系统科学 2025-06-03 Xiaochun Ge , Wenqian Shen , Chengwen Xing , Lian Zhao , Jianping An

In this paper, we first describe a matricial Newton-type algorithm designed to solve the multivariable spectrum approximation problem. We then prove its global convergence. Finally, we apply this approximation procedure to multivariate…

最优化与控制 · 数学 2008-09-30 Federico Ramponi , Augusto Ferrante , Michele Pavon

Hardware neural networks that implement synaptic weights with embedded non-volatile memory, such as spin torque memory (ST-MRAM), are a major lead for low energy artificial intelligence. In this work, we propose an approximate storage…

新兴技术 · 计算机科学 2018-10-26 Nicolas Locatelli , Adrien F. Vincent , Damien Querlioz

The ultimate goal of any numerical scheme for partial differential equations (PDEs) is to compute an approximation of user-prescribed accuracy at quasi-minimal computational time. To this end, algorithmically, the standard adaptive finite…

For a variety of regularized optimization problems in machine learning, algorithms computing the entire solution path have been developed recently. Most of these methods are quadratic programs that are parameterized by a single parameter,…

机器学习 · 计算机科学 2012-10-31 Bernd Gärtner , Martin Jaggi , Clément Maria

Super-resolution theory aims to estimate the discrete components lying in a continuous space that constitute a sparse signal with optimal precision. This work investigates the potential of recent super-resolution techniques for spectral…

信息论 · 计算机科学 2016-11-24 M. Ferreira Da Costa , W. Dai

Many speech and music analysis and processing schemes rely on an estimate of the fundamental frequency $f_0$ of periodic signal components. Most established schemes apply rather unspecific signal models such as sinusoidal models to the…

声音 · 计算机科学 2021-12-23 Volker Hohmann

We examine the \emph{submodular maximum coverage problem} (SMCP), which is related to a wide range of applications. We provide the first variational approximation for this problem based on the Nemhauser divergence, and show that it can be…

机器学习 · 计算机科学 2020-06-11 Jian Du , Zhigang Hua , Shuang Yang

An implementation of a harmonic injection pulse width modulation frequency-modulated triangular carrier (HIPWM-FMTC) control strategy applied to a multilevel power inverter feeding an asynchronous motor is presented. The aim was to justify…

系统与控制 · 电气工程与系统科学 2024-01-30 Antonio Ruiz-Gonzalez , Juan-Ramon Heredia-Larrubia , Mario J. Meco-Gutierrez , Francisco-M. Perez-Hidalgo

Time-varying coverage, namely sweep coverage is a recent development in the area of wireless sensor networks, where a small number of mobile sensors sweep or monitor comparatively large number of locations periodically. In this article we…

分布式、并行与集群计算 · 计算机科学 2017-04-11 Barun Gorain , Partha Sarathi Mandal

Among various satellite actuators, magnetic torquers have been widely equipped for stabilization and attitude control of small satellites. Although magnetorquers are generally used with other actuators, such as momentum wheels, this paper…

系统与控制 · 电气工程与系统科学 2024-01-23 Kota Kondo , Yasuhiro Yoshimura , Shiji Nagasaki , Toshiya Hanada

The resource requirements of neural networks can be significantly reduced through pruning - the removal of seemingly less important parameters. However, for LLMs, full retraining to recover pruning-induced performance degradation is often…

机器学习 · 计算机科学 2026-02-03 Max Zimmer , Christophe Roux , Moritz Wagner , Deborah Hendrych , Sebastian Pokutta