Results 31 to 40 of about 1,590 (175)

Smooth and Probabilistic PARAFAC Model with Auxiliary Covariates

Journal of Computational and Graphical Statistics, 2023
In immunological and clinical studies, matrix-valued time-series data clustering is increasingly popular. Researchers are interested in finding low-dimensional embedding of subjects based on potentially high-dimensional longitudinal features and investigating relationships between static clinical covariates and the embedding.
openaire   +2 more sources

Evaluating the potential of Volterra-PARAFAC IIR models [PDF]

2013 IEEE International Conference on Acoustics, Speech and Signal Processing, 2013
The Volterra-PARAFAC (VP) nonlinear system model, which consists of a FIR filterbank followed by a memoryless nonlin-earity, aims at offering a good compromise between accuracy and parametric complexity. Here, for an even better compromise , we propose a generalization with IIR filters (VPI model) and evaluate both models.
Phillip Mark Seymour Burt, José Henrique de Morais Goulart   +1 more
openaire   +1 more source

From fresh to marine waters: characterization and fate of dissolved organic matter in the Lena River delta region, Siberia

Frontiers in Marine Science, 2015
Connectivity between the terrestrial and marine environment in the Artic is changing as a result of climate change, influencing both freshwater budgets and the supply of carbon to the sea.
Rafael eGonçalves-Araujo, Rafael eGonçalves-Araujo, Colin Andrew Stedmon, Birgit eHeim, Ivan eDubinenkov, Ivan eDubinenkov, Alexandra eKraberg, Denis eMoiseev, Astrid eBracher, Astrid eBracher   +9 more
doaj   +1 more source

Carbon‐Negative Upcycling of Sewage Sludge into Superiorly Stable Gel Via Liquid‐Phase Utilization Strategy for Water‐Remediation

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
This work developed a low‐temperature sludge hydrothermal coupled with gel crosslinking strategy which could upgrade the waste liquid generated from sewage sludge hydrothermal treatment into the hydrothermal‐liquid‐gel. The inventive hydrothermal‐liquid‐gel exhibited the enhanced pollutant removal capability, high synthetic stability, and superior ...
Zifan Liu, Sunxinyi Wang, Lingxiao Lu, Weiguo Zhang, Qiang Zheng, Cailiang Yue, Huimin Chang, Xiaohui Lu, Ming Xu, Zhi Qian, Qing Zhou, Fuqiang Liu, Baoshan Xing   +12 more
wiley   +1 more source

An Integrative Approach Toward Bio‐Inspired Sequestration of Rare Earth Elements

ChemSusChem, Volume 19, Issue 16, 27 August 2026.
The binding behavior of EF‐hand 4 of calmodulin toward different lanthanide ions was studied using a combination of spectroscopic and computational methods. A resin‐immobilized peptide demonstrated its potential as a selective and sustainable filter material for lanthanide separation.Lanthanides (Ln) are essential for renewable energy technologies, yet
Yulia Perevedentseva, Lukas Waurick, Dini Marlina, Gerda Techert, Yannic Müllers, Franziska Lederer, Heiko M. Möller, Michael U. Kumke, Ulrich Glebe, Björn Drobot   +9 more
wiley   +1 more source

Depth-dependent Photodegradation of Marine Dissolved Organic Matter

Frontiers in Marine Science, 2015
Marine dissolved organic matter (DOM) in surface and deep waters of the eastern Atlantic Ocean and Sargasso Sea was analyzed by excitation emission matrix (EEM) fluorescence spectroscopy and parallel factor analysis (PARAFAC). Photo-degradation with semi-
Stephen Andrew Timko, Anastasia eMaydanov, Sandra L Pittelli, Maureen H Conte, Maureen H Conte, William J Cooper, Boris P Koch, Boris P Koch, Philippe eSchmitt-Kopplin, Philippe eSchmitt-Kopplin, Michael eGonsior   +10 more
doaj   +1 more source

A Constrained PARAFAC Method for Positive Manifold Data [PDF]

Applied Psychological Measurement, 1992
A set of non-negatively correlated variables, referred to as positive manifold data, display a peculiar pattern of loadings in principal compo nents analysis (PCA). If a small set of principal components is rotated to a simple structure, the variables correlate positively with all components, thus displaying positive manifold.
Krijnen, Wim P., Ten Berge, Jos M. F.
openaire   +3 more sources

Local Asymmetric Least Squares (LAsLS) for Noisy and Complex Baseline Correction

Journal of Chemometrics, Volume 40, Issue 8, August 2026.
ABSTRACT The asymmetric least squares (AsLS) method is commonly used and works well when baseline characteristics are relatively uniform, but can be less accurate for non‐uniform, complex, or noisy baselines. Here, we present local AsLS (LAsLS), a local extension of AsLS that preserves the original penalized least‐squares framework while allowing ...
Adrián Gómez‐Sánchez, Berta Torres‐Cobos, Rodrigo Rocha de Oliveira   +2 more
wiley   +1 more source

Efficient Tensor Completion Algorithms for Highly Oscillatory Operators

Numerical Linear Algebra with Applications, Volume 33, Issue 4, August 2026.
ABSTRACT We address the problem of recovering highly oscillatory operators, represented as n×n$$ n\times n $$ matrices with a fixed set of observed entries. Given that these matrices can be well compressed by butterfly matrix decomposition of L=𝒪(logn) levels requiring only O(nlogn)$$ O\left(n\log n\right) $$ degrees of freedom, we propose a novel ...
Navjot Singh, Edgar Solomonik, Xiaoye Sherry Li, Yang Liu   +3 more
wiley   +1 more source

Intelligent Tetracycline Sensing With Carbon Quantum Dots: From Photophysical Engineering to Machine Learning‐Enhanced Detection

Engineering Reports, Volume 8, Issue 7, July 2026.
Carbon quantum dots engineered through heteroatom doping and surface functionalization enable selective tetracycline sensing via fluorescence modulation. Integration of machine learning with portable sensing platforms enhances discrimination accuracy, matrix tolerance, and real‐world applicability for intelligent antibiotic monitoring in food and ...
Mohamed Abu Shuheil, Rasha Eldalawy, Irwanjot Kaur, Ahmed Aldulaimi, Nada Othman Kattab, Kamal Kishore Thakur, Khushnud Azizjanov, Mukhammadali Buriev, Ahmad Amiri   +8 more
wiley   +1 more source