Results 101 to 110 of about 284,905 (340)

Adaptive Autonomy in Microrobot Motion Control via Deep Reinforcement Learning and Path Planning Synergy

Advanced Intelligent Systems, EarlyView.
This study introduces a data‐driven framework that combines deep reinforcement learning with classical path planning to achieve adaptive microrobot navigation. By training a surrogate neural network to emulate microrobot dynamics, the approach improves learning efficiency, reduces training time, and enables robust real‐time obstacle avoidance in ...
Amar Salehi, Bairong Zhu, Haoyu Liu, Tingting Yu   +3 more
wiley   +1 more source

Stochastic backgrounds of gravitational waves from extragalactic sources

, 2010
Astrophysical sources emit gravitational waves in a large variety of processes occurring since the beginning of star and galaxy formation. These waves permeate our high-redshift Universe and form a background which is the result of the superposition of ...
Stefania Marassi, Marassi, S, SCHNEIDER, Raffaella, MARASSI, STEFANIA, FERRARI, Valeria, Ferrari, V, Raffaella Schneider, Valeria Ferrari, Schneider, Rainer   +8 more
core   +1 more source

Machine Learning Confirms GW231123 is a “Lite” Intermediate Mass Black Hole Merger

The Astrophysical Journal Letters
The LIGO–Virgo–KAGRA Collaboration recently reported GW231123, a black hole merger with total mass of around 190–265 M _⊙ . This event adds to the growing evidence of “lite” intermediate mass black hole (IMBH) discoveries of postmerger black holes ≳100 M
Chayan Chatterjee, Kaylah McGowan, Suyash Deshmukh, Nicholas Tyler-Howard, Karan Jani   +4 more
doaj   +1 more source

All-sky search for continuous gravitational waves from isolated neutron stars using Advanced LIGO and Advanced Virgo O3 data

, 2023
We present results of an all-sky search for continuous gravitational waves which can be produced by spinning neutron stars with an asymmetry around their rotation axis, using data from the third observing run of the Advanced LIGO and Advanced Virgo ...
Liu, Guo-qing
core   +1 more source

Spin Precession Signatures as an Indicator of Microlensing in Strongly Lensed Gravitational Waves

The Astrophysical Journal
Microlensing by the stellar field in a strong-lensing galaxy can introduce wave-optics distortions into the waveforms of strongly lensed gravitational waves (SLGWs).
Xikai Shan, Huan Yang, Shude Mao, Otto A. Hannuksela   +3 more
doaj   +1 more source

False Alarm Rates in Detecting Gravitational Wave Lensing from Astrophysical Coincidences: Insights with Model-independent Technique GLANCE

The Astrophysical Journal
Lensing of gravitational waves (GWs) due to intervening massive astrophysical systems between the source and the observer is an inevitable consequence of the general theory of relativity, which can produce multiple GW events with overlapping sky ...
Aniruddha Chakraborty, Suvodip Mukherjee
doaj   +1 more source

Research on Evaporation Characteristics and Safe Storage Duration of Marine Liquid Hydrogen Storage Tanks Under the Coupling Effect of Heat Leakage and Sloshing

Asia-Pacific Journal of Chemical Engineering, EarlyView.
ABSTRACT Liquid hydrogen, a zero‐carbon and high–energy‐density fuel, is a promising option for future oceangoing vessels. During maritime transportation, onboard cryogenic tanks are exposed to ambient heat leakage and ship‐induced roll motion, which can trigger sloshing and fundamentally modify the coupled thermo‐fluid processes governing boil‐off and
Yan Deng, Wenfeng Wu, Zhenyu Zhao, Rongsheng Lin, Liangyi Sun, Youfei Liu   +5 more
wiley   +1 more source

All-sky search for long-duration gravitational wave transients in the first Advanced LIGO observing run

, 2018
We present the results of a search for long-duration gravitational wave transients in the data of the LIGO Hanford and LIGO Livingston second generation detectors between $ \newcommand{\OOneStart}{{\rm 12 ~September ~2015}} \newcommand{\OOneStartShort}{{
B.P. Abbott et al., 조희석, 강궁원
core  

The intrinsic B-mode polarisation of the cosmic microwave background [PDF]

, 2014
. We estimate the B-polarisation induced in the Cosmic Microwave Background by the non-linear evolution of density perturbations. Using the second-order Boltzmann code SONG, our analysis incorporates, for the first time, all physical effects at ...
Guido Pettinari (16190237), Kazuya Koyama (4440604), Crittenden, Robert, Guido W. Pettinari, Kazuya Koyama, Robert Crittenden (16074614), David Wands (16067711), Christian Fidler (16190240), Martin Beneke, Beneke, Martin, Koyama, Kazuya, Pettinari, Guido W., Fidler, Christian, David W, Wands, David, Martin Beneke (16190243), Christian Fidler   +16 more
core   +1 more source

Gravitational Waves from Gravitational Collapse

Living Reviews in Relativity, 2011
Gravitational-wave emission from stellar collapse has been studied for nearly four decades. Current state-of-the-art numerical investigations of collapse include those that use progenitors with more realistic angular momentum profiles, properly treat ...
Chris L. Fryer, Kimberly C.B. New
doaj