Results 11 to 20 of about 279,833 (216)

An effective weighted vector median filter for impulse noise reduction based on minimizing the degree of aggregation

open access: yesIET Image Processing, 2021
Impulse noise is regarded as an outlier in the local window of an image. To detect noise, many proposed methods are based on aggregated distance, including spatially weighted aggregated distance, n nearest neighbour distance, local density, and angle ...
Xiangxi Meng   +3 more
doaj   +1 more source

The influence of distance weight on the inverse distance weighted method for ore-grade estimation

open access: yesScientific Reports, 2021
In order to study the influence of distance weight on ore-grade estimation, the inverse distance weighted (IDW) is used to estimate the Ni grade and MgO grade of serpentinite ore based on a three-dimensional ore body model and related block models ...
Zhan-Ning Liu   +5 more
doaj   +1 more source

Squared distance matrix of a weighted tree

open access: yesElectronic Journal of Graph Theory and Applications, 2019
Let T be a tree with vertex set {1, …, n} such that each edge is assigned a nonzero weight. The squared distance matrix of T,  denoted by Δ,  is the n × n matrix with (i, j)-element d(i, j)2,  where d(i, j) is the sum of the weights of the edges on the ...
Ravindra B. Bapat
doaj   +1 more source

Sparse Multicategory Generalized Distance Weighted Discrimination in Ultra-High Dimensions

open access: yesEntropy, 2020
Distance weighted discrimination (DWD) is an appealing classification method that is capable of overcoming data piling problems in high-dimensional settings. Especially when various sparsity structures are assumed in these settings, variable selection in
Tong Su   +8 more
doaj   +1 more source

A Path-Deformation Framework for Determining Weighted Genome Rearrangement Distance

open access: yesFrontiers in Genetics, 2020
Measuring the distance between two bacterial genomes under the inversion process is usually done by assuming all inversions to occur with equal probability. Recently, an approach to calculating inversion distance using group theory was introduced, and is
Sangeeta Bhatia   +5 more
doaj   +1 more source

Speckle Suppression by Weighted Euclidean Distance Anisotropic Diffusion

open access: yesRemote Sensing, 2018
To better reduce image speckle noise while also maintaining edge information in synthetic aperture radar (SAR) images, we propose a novel anisotropic diffusion algorithm using weighted Euclidean distance (WEDAD).
Fengcheng Guo   +5 more
doaj   +1 more source

Quantifying spatial accessibility in public health practice and research: an application to on-premise alcohol outlets, United States, 2013

open access: yesInternational Journal of Health Geographics, 2018
Objective To assess spatial accessibility measures to on-premise alcohol outlets at census block, census tract, county, and state levels for the United States.
Hua Lu   +4 more
doaj   +1 more source

Zero-Shot Recognition Enhancement by Distance-Weighted Contextual Inference

open access: yesApplied Sciences, 2020
Zero-shot recognition (ZSR) aims to perform visual classification by category in the absence of training samples. The focus in most traditional ZSR models is using semantic knowledge about familiar categories to represent unfamiliar categories with only ...
Doo Soo Chang   +2 more
doaj   +1 more source

Wind Turbine Fault Diagnosis by the Approach of SCADA Alarms Analysis

open access: yesApplied Sciences, 2021
Wind farm operators are overwhelmed by a large amount of supervisory control and data acquisition (SCADA) alarms when faults occur. This paper presents an online root fault identification method for SCADA alarms to assist operators in wind turbine fault ...
Lu Wei   +3 more
doaj   +1 more source

An aero-engine state evaluation method based on weighted Hellinger distance

open access: yesMeasurement + Control, 2023
In the process of prediction and health management (PHM) about remaining useful life (RUL) of aero-engine, the state evaluation of aero-engine by constructing health index (HI) plays a very important role. At present, in the research of aero-engine state
Biao Yang   +3 more
doaj   +1 more source

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