Results 21 to 30 of about 84,618 (266)

Diagnosis Method for Sparse Optimization Based on Multi-step Grid Search of Bearing Coupling Faults

Jixie chuandong, 2022
Under the unbalance-bearing coupling fault of the rotor system, the unbalance fault features and bearing faults modulate each other, and the weak fault features are easily submerged by the strong fault features and strong noise components.
Gong Xiaoyun, Li Chao, Zhao Zhiwei, Ning Xiaobo, Zhang Yuxiang, Han Ming   +5 more
doaj  

A Novel Sparse Bayesian Space-Time Adaptive Processing Algorithm to Mitigate Off-Grid Effects

Remote Sensing, 2022
Space-time adaptive processing (STAP) algorithms based on sparse recovery (SR) have been researched because of their low requirement of training snapshots.
Cheng Liu, Tong Wang, Kun Liu, Xinying Zhang   +3 more
doaj   +1 more source

Sparse grid quadrature on products of spheres [PDF]

Numerical Algorithms, 2015
We examine sparse grid quadrature on weighted tensor products (WTP) of reproducing kernel Hilbert spaces on products of the unit sphere, in the case of worst case quadrature error for rules with arbitrary quadrature weights. We describe a dimension adaptive quadrature algorithm based on an algorithm of Hegland (2003), and also formulate a version of ...
Markus Hegland, Paul C. Leopardi
openaire   +4 more sources

An Off-Grid DOA Estimation Method Using Proximal Splitting and Successive Nonconvex Sparsity Approximation

IEEE Access, 2019
Direction-of-arrival (DOA) estimation is a fundamental problem in many signal processing. Recently, a variety of sparsity-aware methods have been proposed for DOA estimation.
Xiaowei Zhang, Tao Jiang, Yingsong Li, Xiaoguang Liu   +3 more
doaj   +1 more source

On the dispersion of sparse grids

Journal of Complexity, 2018
For any natural number $d$ and positive number $\varepsilon$, we present a point set in the $d$-dimensional unit cube $[0,1]^d$ that intersects every axis-aligned box of volume greater than $\varepsilon$. These point sets are very easy to handle and in a vast range for $\varepsilon$ and $d$, we do not know any smaller set with this property.
openaire   +2 more sources

A Boolean sum interpolation for multivariate functions of bounded variation

Frontiers in Applied Mathematics and Statistics
This paper deals with the approximation error of trigonometric interpolation for multivariate functions of bounded variation in the sense of Hardy-Krause.
Jürgen Prestin, Yevgeniya V. Semenova
doaj   +1 more source

Orthogonal polynomial expansions on sparse grids

Journal of Complexity, 2014
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Yanzhao Cao, Ying Jiang 0002, Yuesheng Xu   +2 more
openaire   +1 more source

Generating Sparse Wire-Grid Antennas Using Maximum Current-Based Optimal Current Grid Approximation

IEEE Open Journal of Antennas and Propagation
The rapid advancement of telecommunication systems demands antennas with reduced mass and size. Wire-grid structures serve as effective alternatives to traditional solid metal antennas by significantly reducing their mass.
Manh Tuan Nguyen, Adnan Faiezovich Alhaj Hasan, Talgat Rashitovich Gazizov   +2 more
doaj   +1 more source

Development of Reduced Order Model for Steady State Flow Field in Two-dimensional Lower Plenum

Yuanzineng kexue jishu
In the field of reactor thermal-hydraulics, system thermal-hydraulic codes have been widely employed to quickly determine the global response characteristics of the primary system.
SHANG He1, PENG Minjun1, 2, XIA Genglei1, 2, , ZHANG Shiqi1, ZHU Shijie1
doaj   +1 more source

Spatial biology in cancer epigenetics

Molecular Oncology, EarlyView.
Spatial epigenomics combines molecular profiling with tissue architecture to reveal how gene regulation is organized within intact tissues. In cancer, these technologies uncover the mechanisms driving tumor heterogeneity and microenvironmental interactions, opening new opportunities for biomarker discovery and precision medicine.
Eva Crespo‐García, Manel Esteller
wiley   +1 more source