24 research outputs found
Tendency of Adhesive Particles on the Liquid Wall Layer in the Turbulent Flow Channel
The experimental investigation and simulation model approach were carried out to investigate the behavior of the fine particles to adÂhere on the layer of liquid on the wall in gas-solid two-phase flow. Polymethyl methacrylate having two different mean-diameters of 20 mm and of 50mm was used for measurement. By using continuous feeding sysÂtem, the fine particles were entrained and mixed with the air in the duct. Experiment for solid particle gas with two-phase flow in room temperature was carried out to make a clear turbulent effect for particle adhering behavior to wall side having a high-viscosity liquid layer. These phenomena were also investigated by the simulation model which represented the experimental condition for two-phase flow and using k-ε two equation models for turbulent flow. The experimental result showed that adhered particle quantity depends on particle feeding rate. The result of simulation model also showed the same tendency. The relation of the various particles feeding rate and capture rate were also described
SILVERRUSH X:Machine Learning-aided Selection of 9318 LAEs at z=2.2, 3.3, 4.9, 5.7, 6.6, and 7.0 from the HSC SSP and CHORUS Survey Data
We present a new catalog of Ly emitter (LAE) candidates at , , , , , and that are photometrically selected
by the SILVERRUSH program with a machine learning technique from large area (up
to deg) imaging data with six narrowband filters taken by the Subaru
Strategic Program with Hyper Suprime-Cam (HSC SSP) and a Subaru intensive
program, Cosmic HydrOgen Reionization Unveiled with Subaru (CHORUS). We
construct a convolutional neural network that distinguishes between real LAEs
and contaminants with a completeness of % and a contamination rate of %,
enabling us to efficiently remove contaminants from the photometrically
selected LAE candidates. We confirm that our LAE catalogs include LAEs
that have been spectroscopically identified in our SILVERRUSH programs and
previous studies, ensuring the validity of our machine learning selection. In
addition, we find that the object-matching rates between our LAE catalogs and
our previous results are -% at bright NB magnitudes of
mag. We also confirm that the surface number densities of our LAE
candidates are consistent with previous results. Our LAE catalogs will be made
public on our project webpage.Comment: 19 pages, 10 figures, accepted for publication in ApJ. Our LAE
catalogs will become available at http://cos.icrr.u-tokyo.ac.jp/rush.htm