Results 81 to 90 of about 68,679 (236)

Multitarget Recognition of Flower Images Based on Lightweight Deep Neural Network and Transfer Learning

Advanced Intelligent Systems, EarlyView.
This article proposes a lightweight YOLOv4‐based detection model using MobileNetV3 or CSPDarknet53_tiny, achieving 30+ FPS and higher mAP. It also presents a ShuffleNet‐based classification model with transfer learning and GAN‐augmented images, improving generalization and accuracy.
Qingyang Liu, Yanrong Hu, Hongjiu Liu
wiley   +1 more source

Observational Mass-to-Light Ratio of Galaxy Systems: from Poor Groups to Rich Clusters [PDF]

, 2001
We study the mass-to-light ratio of galaxy systems from poor groups to rich clusters, and present for the first time a large database for useful comparisons with theoretical predictions.
Adami C., Adami C., Andreon S., Bottinelli L., Colless M., Danese L., Durret F., Efstathiou G., Eke V. R., Fioc M., Fritsch C., Fusun Limboz, Gavazzi G., Giuliano Giuricin, Giuricin G., Gourgoulhon E., Heydon-Dumbleton N. H., Jansen R. A., Katgert P., Lumsden S. L., Maddox S. J., Marino Mezzetti, Marisa Girardi, Metcalfe N., Patrizia Manzato, Pisani A., Pisani A., Rauzy S., Rees M. J., Schaeffer R., Schindler S., Shanks T., Wamsteker W., Zwicky F.   +33 more
core   +2 more sources

Radial metal abundance profiles in the intra-cluster medium of cool-core galaxy clusters, groups, and ellipticals [PDF]

, 2017
The hot intra-cluster medium (ICM) permeating galaxy clusters and groups is not pristine, as it has been continuously enriched by metals synthesised in Type Ia (SNIa) and core-collapse (SNcc) supernovae since the major epoch of star formation (z similar ...
F. Mernier, J. Plaa, J. Kaastra, Yu-ying Zhang, H. Akamatsu, L. Gu, P. Kosec, J. Mao, C. Pinto, T. Reiprich, Jeremy S. Sanders, A. Simionescu, N. Werner   +12 more
semanticscholar   +1 more source

Discovery and Initial Investigation of a New Low Surface Brightness Planetary Nebula Candidate at High Galactic Latitude

Astronomische Nachrichten, EarlyView.
ABSTRACT Planetary nebulae represent a late evolutionary phase of low‐ to intermediate‐mass stars. In this article, we present the serendipitous discovery of a previously unknown, faint potential Galactic planetary nebula (PN) in the constellation Camelopardalis, identified during a survey‐inspection, aiming at the detection of dwarf companions of the ...
W. E. Celnik, P. Köchling, S. Kotov, J. Kozok, Y. Galata, L. Magrini, A. Moiseev, M. Nischang, C. Reese, P. Remmel, P. Riepe, T. Zilch, K. Werner   +12 more
wiley   +1 more source

THERMAL AND CHEMICAL EVOLUTIONS OF GALAXY CLUSTERS OBSERVED WITH SUZAKU

Acta Polytechnica, 2013
We studied the properties of the intracluster medium (ICM) of galaxy clusters to outer regions observed with Suzaku. The observed temperature dropped by about ~30% from the central region to the virial radius of the clusters.
Kosuke Sato, Kyoko Matsushita, Yoshitaka Ishisaki, Noriko Y. Yamasaki, Takaya Ohashi   +4 more
doaj   +1 more source

HICOSMO - Cosmology with a complete sample of galaxy clusters: I. Data analysis, sample selection and luminosity-mass scaling-relation

, 2017
The X-ray regime, where the most massive visible component of galaxy clusters, the intra cluster medium (ICM), is visible, offers directly measured quantities, like the luminosity, and derived quantities, like the total mass, to characterize these ...
Reiprich, T. H., Schellenberger, G.
core   +1 more source

LoCuSS : pre-processing in galaxy groups falling into massive galaxy clusters at z=0.2 [PDF]

, 2017
We report direct evidence of pre-processing of the galaxies residing in galaxy groups falling into galaxy clusters drawn from the Local Cluster Substructure Survey (LoCuSS). 34 groups have been identified via their X-ray emission in the infall regions of
M. Bianconi, Graham P. Smith, C. Haines, S. McGee, A. Finoguenov, E. Egami   +5 more
semanticscholar   +1 more source

Test of Cosmic Web-feeding Model for Star Formation in Galaxy Clusters in the COSMOS Field

The Astrophysical Journal
It is yet to be understood how large-scale environments influence star formation activity in galaxy clusters. One recently proposed mechanism is that galaxy clusters can remain star forming when fed by infalling groups and star-forming galaxies from ...
Eunhee Ko, Myungshin Im, Seong-Kook Lee, Clotilde Laigle   +3 more
doaj   +1 more source

A New X-ray Selected Sample of Very Extended Galaxy Groups from the ROSAT All-Sky Survey

, 2018
Some indications for tension have long been identified between cosmological constraints obtained from galaxy clusters and primary CMB measurements.
Erben, Thomas, Pacaud, Florian, Ramos-Ceja, Miriam E., Reiprich, Thomas H., Xu, Weiwei   +4 more
core   +1 more source

The Blooming Tree Algorithm at Work: Clusters, Filaments, and Superclusters in the Field of A2029

The Astrophysical Journal
The Blooming Tree (BT) algorithm, based on the hierarchical clustering method, is designed to identify clusters, groups, and substructures from galaxy redshift surveys.
Heng Yu, Antonaldo Diaferio
doaj   +1 more source