Results 11 to 20 of about 10,049,409 (261)

Macerals of lignite and the effect of alkali treatment on the structure and combustion performance of lignite

open access: yesMeitan xuebao, 2023
Suppressing the spontaneous combustion of lignite is of great significance for safe transportation and efficient utilization of lignite. Taking the Shengli lignite as the research object, two different macerals, inertinite and huminite, were selected by ...
Yanjun WANG   +7 more
doaj   +1 more source

Research Progress on Electro-Chemical Oxidation of Low-Rank Coal to Humic Acid

open access: yes南方能源建设, 2022
[Introduction] With the vigorous development of renewable energy, clean and efficient utilization of low-rank coal not only improves resource utilization and economic value but also has great social significance.
Ruzhan BAI   +6 more
doaj   +1 more source

Recent progress of modified CeO2-based materials for photocatalytic environmental remediation and antibacterial activity

open access: yesEnvironmental Functional Materials, 2023
The rapid development of industrialization and urbanization has led to serious environmental pollution. As an environmentally friendly and sustainable energy source, solar-driven semiconductor photocatalysis has been widely applied in environmental ...
Kai Miao   +8 more
doaj   +1 more source

Structured Low-rank Approximation as a Rational Function Minimization [PDF]

open access: yes, 2012
Many problems of system identification, model reduction and signal processing can be posed and solved as a structured low-rank approximation problem (SLRA).
Markovsky, Ivan   +2 more
core   +2 more sources

Low-Rank Gradient Descent

open access: yesIEEE Open Journal of Control Systems, 2023
Several recent empirical studies demonstrate that important machine learning tasks such as training deep neural networks, exhibit a low-rank structure, where most of the variation in the loss function occurs only in a few directions of the input space ...
Romain Cosson   +4 more
doaj   +1 more source

Low‐rank isomap algorithm

open access: yesIET Signal Processing, 2022
Isomap is a well‐known nonlinear dimensionality reduction method that highly suffers from computational complexity. Its computational complexity mainly arises from two stages; a) embedding a full graph on the data in the ambient space, and b) a complete ...
Eysan Mehrbani, Mohammad Hossein Kahaei
doaj   +1 more source

A Remote Sensing Image Destriping Model Based on Low-Rank and Directional Sparse Constraint

open access: yesRemote Sensing, 2021
Stripe noise is a common condition that has a considerable impact on the quality of the images. Therefore, stripe noise removal (destriping) is a tremendously important step in image processing.
Xiaobin Wu   +4 more
doaj   +1 more source

Using benzene carboxylic acids to prepare zirconium-based catalysts for the conversion of biomass-derived furfural

open access: yesInternational Journal of Coal Science & Technology, 2017
Benzene carboxylic acid (BCAs) are common and useful chemical blocks, which can be derived from the abundant low rank coals (LRCs) via oxidative degradation. In this work, we proposed a novel strategy to utilize BCAs as raw materials to prepare catalysts
Huacong Zhou   +8 more
doaj   +1 more source

Low rank prior in single patches for non-pointwise impulse noise removal [PDF]

open access: yes, 2015
This paper introduces a low rank prior in small oriented noise-free image patches: Considering an oriented patch as a matrix, a low-rank matrix approximation is enough to preserve the texture details in the optimally oriented patch.
Trucco, Emanuele; id_orcid   +2 more
core   +1 more source

Non-Negative Low Rank Graph Embedding Algorithm

open access: yesJisuanji kexue yu tansuo, 2020
The existing non-negative matrix factorization (NMF) algorithms still have some shortcomings. On one hand, the NMF method calculates its low-dimensional representation directly on the high-dimensional original image data set, but in fact the effective ...
LIU Guoqing, LU Guifu, ZHOU Sheng, XUAN Dongdong, CAO Along
doaj   +1 more source

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