Results 21 to 30 of about 538,751 (313)

Extended Langford Sequences with Small Defects

Journal of Combinatorial Theory, Series A, 1998
A \(k\)-extended Langford sequence of defect \(d\) and length \(m\) is a sequence \(s_1,\dots,s_{2m+1}\) in which \(s_k=\varepsilon\), where \(\varepsilon\) is the null symbol and each other member of the sequence comes from the set \(S=\{d,d+1,\dots,d+m-1\}\). Each \(j\in S\) occurs exactly twice in the sequence and the two occurences are separated by
Václav Linek, Zhike Jiang
openaire   +1 more source

A Light-Weight Network for Small Insulator and Defect Detection Using UAV Imaging Based on Improved YOLOv5

Sensors, 2023
Insulator defect detection is of great significance to compromise the stability of the power transmission line. The state-of-the-art object detection network, YOLOv5, has been widely used in insulator and defect detection. However, the YOLOv5 network has
Tong Zhang, Yinan Zhang, Min Xin, Jiashe Liao, Qingfeng Xie   +4 more
doaj   +1 more source

Point-Defect-Localized Bound States in the Continuum in Photonic Crystals and Structured Fibers

, 2021
We show that point defects in two-dimensional photonic crystals can support bound states in the continuum (BICs). The mechanism of confinement is a symmetry mismatch between the defect mode and the Bloch modes of the photonic crystal. These BICs occur in
Alexander Cerjan (11831966), Mikael C. Rechtsman (3963206), Wladimir A. Benalcazar (14357898), Sachin Vaidya (14363847)   +3 more
core   +1 more source

A Method of Locating and Measuring Train Wheel Tread Defects Based on YOLOv3-tiny

Kongzhi Yu Xinxi Jishu, 2022
Aiming at the problem of insufficient detection frame size accuracy in the deep learning based wheelset tread defect detection algorithm, this paper proposes a tread defect detection algorithm based on YOLOv3-tiny and traditional image algorithm, which ...
JIN Kairong, WANG Junping, CHEN Shenglan
doaj   +3 more sources

Printed Circuit Board Defect Detection Using Deep Learning via A Skip-Connected Convolutional Autoencoder

Sensors, 2021
As technology evolves, more components are integrated into printed circuit boards (PCBs) and the PCB layout increases. Because small defects on signal trace can cause significant damage to the system, PCB surface inspection is one of the most important ...
Jungsuk Kim, Jungbeom Ko, Hojong Choi, Hyunchul Kim   +3 more
doaj   +1 more source

Defect Detection in Thin-film Photovoltaics; Towards Improved Efficiency and Longevity [PDF]

, 2014
The photovoltaic (PV) industry is seeking to increase efficiency and functional lifetime of PV modules manufactured on polymer substrates. High resolution and high speed surface inspection for the quality control of the manufacture of large area flexible
Robbins, David, Robbins, D., Blunt, Liam, Fleming, Leigh, M. Elrawemi, Fleming, L., Centre for Precision Technologies, Huddersfield University, West Yorkshire. UK, Blunt, L., Sweeney, Francis, L. Blunt, D. Robbins, Elrawemi, Mohamed, L. Fleming, Centre for Process Innovation Limited, Sedgefield, County Durham. UK, F. Sweeney, Sweeney, F.   +15 more
core   +1 more source

Regeneration of the Gastrointestinal Tract After Using a Small Intestine Submucosa Patch—A Rat Model

Biomedicines
Background: Necrotizing enterocolitis (NEC) is a life-threatening condition characterized by necrosis of the gastrointestinal tract caused by hypoperfusion and hypoxia-induced inflammation. Surgical treatment often requires resection, with high morbidity
Tamas Toth, Radu-Alexandru Prisca, Emoke Andrea Szasz, Reka Borka-Balas, Angela Borda   +4 more
doaj   +1 more source

A neighborhood vector principal component analysis method for small defect target detection

, 2017
The Local Contrast Method (LCM) has many advantages for detecting large defect targets in optical components. However, it often suffers from low performance when the defect target is located in a local bright region, which reduces the accuracy of ...
Bingliang Hu, Jingwei Kou, Hu, Bingliang, Zhengzhou Wang, Wang, Zhengzhou, Kou, Jingwei, Qinye Yin, Yin, Qinye (qyyin@mail.xjtu.edu.cn), Xia, Yanwen, Yanwen Xia, Yin, Qinye   +10 more
core   +1 more source

Blocks of small defect

Journal of Algebra, 2015
Let $G$ be a finite solvable group, let $p$ be a prime such that $p \geq 5$ and $O_p(G)=1$, and we denote $|G|_p=p^n$, then $G$ contains a block of defect less than or equal to $\lfloor \frac {3n} 5 \rfloor$. Let $G$ be a finite solvable group and let $p^a$ be the largest power of $p$ dividing $χ(1)$ for an irreducible character $χ$ of $G$, we show ...
openaire   +3 more sources

Symmetric group blocks of small defect

Journal of Algebra, 2004
This paper is an attempt to compute the decomposition numbers of the blocks of the symmetric group which have "small defect"; that is, blocks of weight smaller than the characteristic. We present various methods for computing such decomposition numbers and use these as support for a conjecture which relates decomposition numbers in different ...
James, Gordon, Mathas, Andrew
openaire   +2 more sources