Results 31 to 40 of about 26,367 (267)

Reseaech on identification of caving coal and rock traits

open access: yesGong-kuang zidonghua, 2017
In order to recognize caving coal and rock traits in fully mechanized caving face, an identification method based on continuous wavelet transform and improved singular value decomposition (SVD) was proposed.
LI Yiming, FU Shichen, LI Rui, WU Miao
doaj   +1 more source

The probability of a subspace swap in the SVD [PDF]

open access: yesIEEE Transactions on Signal Processing, 1995
We extend the work of Tufts, Kot, and Vaccaro (1987, 1991) to improve the analytical characterization of threshold breakdown in SVD methods. Our results sharpen the Tufts, Kot, and Vaccaro results and lower bound the probability of a subspace swap in the SVD. >
John K. Thomas   +2 more
openaire   +1 more source

The Evolution of Double Pylorus Associated With NSAIDs-Induced Gastric Ulcer

open access: yesThe Indonesian Journal of Gastroenterology, Hepatology and Digestive Endoscopy
Double pylorus is an uncommon condition where two communicating channels between the gastric antrum and duodenal bulb exist and found incidentally by esophagogastroduodenoscopy.
Rasco Sandy Sihombing   +2 more
doaj   +1 more source

A light‐triggered Time‐Resolved X‐ray Solution Scattering (TR‐XSS) workflow with application to protein conformational dynamics

open access: yesFEBS Open Bio, EarlyView.
Time‐resolved X‐ray solution scattering captures how proteins change shape in real time under near‐native conditions. This article presents a practical workflow for light‐triggered TR‐XSS experiments, from data collection to structural refinement. Using a calcium‐transporting membrane protein as an example, the approach can be broadly applied to study ...
Fatemeh Sabzian‐Molaei   +3 more
wiley   +1 more source

Analysing the significance of small conformational changes and low occupancy states in serial crystallographic data

open access: yesFEBS Open Bio, EarlyView.
This protocol paper outlines methods to establish the success of a time‐resolved serial crystallographic experiment, by means of statistical analysis of timepoint data in reciprocal space and models in real space. We show how to amplify the signal from excited states to visualise structural changes in successful experiments.
Jake Hill   +4 more
wiley   +1 more source

IDENTIFIKASI BATAS SUB-CEKUNGAN HIDROKARBON MENGGUNAKAN ANALISIS SHD (SECOND HORIZONTAL DERIVATIVE) DAN SVD (SECOND VERTICAL DERIVATIVE) BERDASARKAN KORELASI DATA GAYABERAT DAN SEISMIK

open access: yesJGE, 2020
Gravity method generally can read the difference of rock density to identify subsurface structures. This research was conducted in Riau area with the aim of knowing fault and subsurface structure, and determining sub-basin boundary.
Wuri Andari   +2 more
doaj   +1 more source

OFDM Channel Estimation Along with Denoising Approach under Small SNR Environment using SSA

open access: yesJournal of Communications Software and Systems, 2022
—In this paper, a de-noising approach in conjunction with channel estimation (CE) algorithm for OFDM systems using singular spectrum analysis (SSA) is presented. In the proposed algorithm, the initial CE is computed with the aid of traditional linear
E. Hari Krishna   +2 more
doaj   +1 more source

Normal‐Appearing White Matter Injury Mediates Chronic Deep Venous Hypoxia and Disease Progression in Multiple Sclerosis

open access: yesAnnals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective To explore how cerebral hypoxia and Normal‐Appearing White Matter (NAWM) integrity affect MS lesion burden and clinical course. Methods Seventy‐nine MS patients, including 13 clinically isolated syndrome (CIS) patients and 66 relapsing–remitting multiple sclerosis (RRMS) patients, and 44 healthy controls (HCs) were recruited from ...
Xinli Wang   +8 more
wiley   +1 more source

Using singular value decomposition for generalized linear autoregression of signals

open access: yesCurrent Directions in Biomedical Engineering, 2018
Autoregressive models (AR) are fundamental for analysis, representation, and prediction of signals. AR modelling uses the premise that past signal values influence current ones.
Schanze Thomas
doaj   +1 more source

Medical Image Enhancement using Modified HE with DWT and SVD [PDF]

open access: yesInternational Journal of Mathematical, Engineering and Management Sciences
Medical imaging is essential for obtaining precise information to assess patient health and provide effective treatment. The initial analysis of a wide range of medical images is vital for identifying abnormalities.
Anuj Bhardwaj, Neha Chandra
doaj   +1 more source

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