Results 61 to 70 of about 761,172 (262)

Superpixel Segmentation Based on Grid Point Density Peak Clustering

Sensors, 2021
Superpixel segmentation is one of the key image preprocessing steps in object recognition and detection methods. However, the over-segmentation in the smoothly connected homogenous region in an image is the key problem.
Xianyi Chen, Xiafu Peng, Sun’an Wang
doaj   +1 more source

Efficient Computation of Multiple Density-Based Clustering Hierarchies

, 2017
HDBSCAN*, a state-of-the-art density-based hierarchical clustering method, produces a hierarchical organization of clusters in a dataset w.r.t. a parameter mpts. While the performance of HDBSCAN* is robust w.r.t.
Campello, Ricardo J. G. B., Nascimento, Mario A., Neto, Antonio Cavalcante Araujo, Sander, Joerg   +3 more
core   +1 more source

Protein pyrophosphorylation by inositol pyrophosphates — detection, function, and regulation

FEBS Letters, EarlyView.
Protein pyrophosphorylation is an unusual signaling mechanism that was discovered two decades ago. It can be driven by inositol pyrophosphate messengers and influences various cellular processes. Herein, we summarize the research progress and challenges of this field, covering pathways found to be regulated by this posttranslational modification as ...
Sarah Lampe, Tanmay Kumar Mohanty, Rashna Bhandari, Dorothea Fiedler   +3 more
wiley   +1 more source

A novel density-based clustering method for effective removal of spurious intersections in bearings-only localization

EURASIP Journal on Advances in Signal Processing, 2023
In bearings-only localization, clustering-based methods have been widely used to remove spurious intersections by fusing multiple bearing measurements from different observation stations.
Zhian Deng, Zhiguo Wang, Tianbao Zhang, Chunjie Zhang, Weijian Si   +4 more
doaj   +1 more source

Function‐driven design of a surrogate interleukin‐2 receptor ligand

FEBS Letters, EarlyView.
Interleukin (IL)‐2 signaling can be achieved and precisely fine‐tuned through the affinity, distance, and orientation of the heterodimeric receptors with their ligands. We designed a biased IL‐2 surrogate ligand that selectively promotes effector T and natural killer cell activation and differentiation. Interleukin (IL) receptors play a pivotal role in
Ziwei Tang, Zelin Cheng, Teng Li, Fulian Wang, Liangminghui Zhang, Xiuxiu He, Lili Liu, Wei Wang, Aibin Liang, Guang Yang   +9 more
wiley   +1 more source

Mechanisms of parasite‐mediated disruption of brain vessels

FEBS Letters, EarlyView.
Parasites can affect the blood vessels of the brain, often causing serious neurological problems. This review explains how different parasites interact with and disrupt these vessels, what this means for brain health, and why these processes matter. Understanding these mechanisms may help us develop better ways to prevent or treat brain infections in ...
Leonor Loira, Sílvia Arroz‐Madeira, Cláudio A. Franco, Sara Silva Pereira   +3 more
wiley   +1 more source

Time after time – circadian clocks through the lens of oscillator theory

FEBS Letters, EarlyView.
Oscillator theory bridges physics and circadian biology. Damped oscillators require external drivers, while limit cycles emerge from delayed feedback and nonlinearities. Coupling enables tissue‐level coherence, and entrainment aligns internal clocks with environmental cues.
Marta del Olmo, Carolin Ector, Hanspeter Herzel   +2 more
wiley   +1 more source

Parallel Density-Based Clustering Algorithm by Using Weighted Grid and Information Entropy

Jisuanji kexue yu tansuo, 2020
Aiming at the problems of unreasonable division of data gridding, low accuracy of clustering results and low efficiency of parallelization in big data clustering algorithm based on density, this paper proposes a density-based clustering algorithm by ...
HU Jian, XU Kaibin, MAO Yimin
doaj   +1 more source

A census of $\rho$ Oph candidate members from Gaia DR2

, 2019
The Ophiuchus cloud complex is one of the best laboratories to study the earlier stages of the stellar and protoplanetary disc evolution. The wealth of accurate astrometric measurements contained in the Gaia Data Release 2 can be used to update the ...
Bombrun, A., Cantero, C., Cieza, L., Cánovas, H., Lammers, U., Merín, B., Mora, A., Ribas, Á., Ruíz-Rodríguez, D.   +8 more
core   +1 more source

Directional density-based clustering

Advances in Data Analysis and Classification
Density-based clustering methodology has been widely considered in the statistical literature for classifying Euclidean observations. However, this approach has not been contemplated for directional data yet. In this work, directional density-based clustering methodology is fully established for the unit hypersphere by solving the computational ...
Saavedra-Nieves, Paula, Fernández-Pérez, Martín   +1 more
openaire   +2 more sources