Publications (37)
S-GRPO: Unified Post-Training for Large Vision-Language Models
Yuming Yan, Kai Tang, Sihong Chen +4
Current post-training methodologies for adapting Large Vision-Language Models (LVLMs) generally fall into two paradigms: Supervised Fine-Tuning (SFT) and Reinforcement Learning (RL…
Extraordinary transmission caused by symmetry breaking
Dan Hu, Changqing Xie, Ming Liu +1
The terahertz transmission properties of symmetrical and asymmetrical annular apertures arrays (AAAs) are investigated both experimentally and numerically. It is found that only od…
The Merger Dynamics of the Galaxy Cluster Abell 1775: New Insights from Chandra and XMM-Newton for a Cluster Simultaneously Hosting a WAT and a NAT Radio Sources
Dan Hu, Haiguang Xu, Zhenghao Zhu +13
We present a new study of the merger dynamics of Abell~1775 by analyzing the high-quality Chandra and XMM-Newton archival data. We confirm/identify an arc-shaped edge (i.e., the he…
New algorithm of cuff-tissue-artery system modeled as the space axisymmetric problem
Jiacheng Xu, Dan Hu
In this paper, mathematical models for cuff-tissue-artery system are developed and simplified into an axisymmetric problem in space. It is nonlinear properties of cuff and artery w…
Extremality of graph entropy based on degrees of uniform hypergraphs with few edges
Dan Hu, Xueliang Li, Xiaogang Liu +1
Let be a hypergraph with vertices. Suppose that are degrees of the vertices of . The -th graph entropy based on degrees of $\…
A Chandra Study of the Image Power Spectra of 41 Cool Core and Non-Cool Core Galaxy Clusters
Chenhao Zhang, Haiguang Xu, Zhenghao Zhu +9
In this work we propose a new diagnostic to segregate cool core (CC) clusters from non-cool core (NCC) clusters by studying the two-dimensional power spectra of the X-ray images ob…
SUGAR: Spherical Ultrafast Graph Attention Framework for Cortical Surface Registration
Jianxun Ren, Ning An, Youjia Zhang +12
Cortical surface registration plays a crucial role in aligning cortical functional and anatomical features across individuals. However, conventional registration algorithms are com…
The warm-hot intergalactic medium in inter-cluster filaments -- A forecast for HUBS observations based on eRASS1 superclusters
Yuanyuan Zhao, Haiguang Xu, Ang Liu +8
Cosmological simulations indicate that nearly half of the baryons in the nearby Universe are in the warm-hot intergalactic medium (WHIM) phase, and about a half them reside in cosm…
An evaluation of source-blending impact on the calibration of SKA EoR experiments
Chenxi Shan, Haiguang Xu, Yongkai Zhu +8
Twenty-one-centimetre signals from the Epoch of Reionization (EoR) are expected to be detected in the low-frequency radio window by the next-generation interferometers, particularl…
Metal sign of a large-scale AGN feedback in cool-core cluster MACS J1931.8-2634
Qinnan Zhu, Junjie Mao, Ping Zhou +2
The spatial distribution of metals in the intracluster medium (ICM) is a sensitive tracer of the chemical and dynamical history of galaxy clusters. While most cool-core (CC) cluste…
A Chandra Study of Radial Temperature Profiles of the Intra-Cluster Medium in 50 Galaxy Clusters
Zhenghao Zhu, Haiguang Xu, Jingying Wang +10
In order to investigate the spatial distribution of the ICM temperature in galaxy clusters in a quantitative way and probe the physics behind, we analyze the X-ray spectra of a sam…
Ram-pressure stripped radio tail and two ULXs in the spiral galaxy HCG 97b
Dan Hu, Michal ZajaÄek, Norbert Werner +11
We report LOFAR and VLA detections of extended radio emission in the spiral galaxy HCG 97b, hosted by an X-ray bright galaxy group. The extended radio emission detected at 144 MHz,…
A Machine Learning Based Morphological Classification of 14,245 Radio AGNs Selected From The Best-Heckman Sample
Zhixian Ma, Haiguang Xu, Jie Zhu +8
We present a morphological classification of 14,245 radio active galactic nuclei (AGNs) into six types, i.e., typical Fanaroff--Riley Class I / II (FRI/II), FRI/II-like bent-tailed…
PathScale-R1: Cross-scale Reasoning for Pathological Image Analysis
Chi Phan, Tianyi Zhang, Yufeng Wu +7
Pathological diagnosis is inherently multi-scale, requiring the integration of global tissue architecture at low magnification with cellular morphology at higher magnification. How…
MWA and VLA Observations of Diffuse Radio Lobes in M 87
Linhui Wu, Fu-Guo Xie, Qian Zheng +12
This study investigates the projected, quasi-symmetric -scale diffuse radio lobes surrounding the giant elliptical galaxy M\,87, utilizing well-sampled wideband ($\…
Vehicle routing problem using deep reinforcement learning - A case study about truck planning in the industry
Siliang Lu, Dan Hu, Lili Wu
As an important component of the supply chain industry, transportation has experienced rapid development in the past decade with the assistance of digital platforms and intelligent…
Ultrathin Terahertz Planar Lenses
Dan Hu, Xinke Wang, Shengfei Feng +5
Conventional optical components shape the wavefront of propagating light by adjusting the optical path length, which requires the use of rather thick lenses, especially for the adj…
Applications of Raman Spectroscopy in Clinical Medicine
Yaping Qi, Esther Xinyi Chen, Dan Hu +8
Raman spectroscopy provides spectral information related to the specific molecular structures of substances and has been well established as a powerful tool for studying biological…
Revealing A Head-on Major Merger in the Nearby NGC 6338 Group with Chandra and VLA observations
Yu Wang, Fuyao Lui, Zhiqiang Shen +3
By analyzing the Chandra archival data of the nearby NGC 6338 galaxy group, we identify two X-ray bright clumps (N-clump and S-clump) within the central 100 kpc, and detect an arc-…
Graphical Nonbinary Quantum Error-Correcting Codes
Dan Hu, Weidong Tang, Meisheng Zhao +3
In this paper, based on the nonbinary graph state, we present a systematic way of constructing good non-binary quantum codes, both additive and nonadditive, for systems with intege…
New entropy estimates for the Oldroyd-B model, and related models
Dan Hu, Tony Lelievre
This short note presents the derivation of a new {\it a priori} estimate for the Oldroyd-B model. Such an estimate may provide useful information when investigating the long-time b…
A Chandra view of SPT-CL J0217-5014: a massive galaxy cluster at a cosmic intersection at z=0.53
Dan Hu, Shida Fan, Zhongsheng Yuan +7
Galaxy clusters trace the densest regions of the cosmic web and are crucial laboratories for studying the thermodynamic and chemical evolution of the intracluster medium (ICM). We…
Enhancing Pathological VLMs with Cross-scale Reasoning
Chi Phan, Tianyi Zhang, Qiaochu Xue +5
Pathological images are inherently multi-scale, requiring pathologists to integrate evidence from global tissue architecture at low magnification to cellular morphology at higher m…
Suzaku Observation of Merging Clusters Abell 222 and Abell 223
Yanling Chen, Wei Cui, Aurora Simionescu +2
Previous X-ray and optical studies of the galaxy cluster pair Abell 222/223 suggested the possible presence of a filamentary structure connecting the two clusters, a result that ap…
MeerKAT discovery of GHz radio emission extending from Abell 3017 toward Abell 3016
Dan Hu, Norbert Werner, Haiguang Xu +18
Context: The clusters Abell 3017 and Abell 3016 are located within a large-scale filament. A prominent X-ray bridge has been detected connecting the two clusters and a potential ga…
Separating the EoR Signal with a Convolutional Denoising Autoencoder: A Deep-learning-based Method
Weitian Li, Haiguang Xu, Zhixian Ma +7
When applying the foreground removal methods to uncover the faint cosmological signal from the epoch of reionization (EoR), the foreground spectra are assumed to be smooth. However…
A Monte Carlo Implementation of Galactic Free-Free Emission for the EoR Foreground Models
Xiaoli Lian, Haiguang Xu, Dongchao Zheng +2
The overwhelming foreground causes severe contamination on the detection of 21-cm signal during the Epoch of Reionization (EoR). Among various foreground components, the Galactic f…
Contribution of Radio Halos to the Foreground for SKA EoR Experiments
Weitian Li, Haiguang Xu, Zhixian Ma +11
The overwhelming foreground contamination is one of the primary impediments to probing the Epoch of Reionization (EoR) through measuring the redshifted 21 cm signal. Among various…
Advancing Noise-Resilient Twist Angle Characterization in Bilayer Graphene through Raman Spectroscopy via GAN-CNN Modeling
Dan Hu, Ting-Fung Chung, Yong P. Chen +1
In this study, we introduce an innovative methodology for robust twist angle identification in bilayer graphene using Raman spectroscopy, featuring the integration of generative ad…
X-ray Intra-day Variability of the TeV Blazar Mrk 421 with Suzaku
Zhongli Zhang, Alok C. Gupta, Haritma Gaur +5
We present X-ray flux and spectral analyses of the three pointed Suzaku observations of the TeV high synchrotron peak blazar Mrk 421 taken throughout its complete operational durat…
Input gradient annealing neural network for solving low-temperature Fokker-Planck equations
Liangkai Hang, Dan Hu, Zhi-Qin John Xu
We present a novel yet simple deep learning approach, called input gradient annealing neural network (IGANN), for solving stationary Fokker-Planck equations. Traditional methods, s…
A Study of Gas Entropy Profiles of 47 Galaxy Clusters and Groups Out to the Virial Radius
Zhenghao Zhu, Haiguang Xu, Dan Hu +6
Some observations such as those presented in Walker et al. show that the observed entropy profiles of the intra-cluster medium (ICM) deviate from the power-law prediction of adiaba…
Deep Learning Assisted Raman Spectroscopy for Rapid Identification of 2D Materials
Yaping Qi, Dan Hu, Zhenping Wu +4
Two-dimensional (2D) materials have attracted extensive attention due to their unique characteristics and application potentials. Raman spectroscopy, as a rapid and non-destructive…
A Study of the Merger History of the Galaxy Group HCG 62 Based on X-Ray Observations and SPH Simulations
Dan Hu, Haiguang Xu, Xi Kang +9
We choose the bright compact group HCG 62, which was found to exhibit both excess X-ray emission and high Fe abundance to the southwest of its core, as an example to study the impa…
Contribution of Galactic free-free emission to the foreground for EoR signal in SKA experiments
Xiaoli Lian, Haiguang Xu, Zhenghao Zhu +1
The overwhelming foreground contamination hinders the accurate detection of the 21-cm signal of neutral hydrogen during the Epoch of Reionization (EoR). Among various foreground co…
Reinforced Curriculum Pre-Alignment for Domain-Adaptive VLMs
Yuming Yan, Shuo Yang, Kai Tang +7
Vision-Language Models (VLMs) demonstrate remarkable general-purpose capabilities but often fall short in specialized domains such as medical imaging or geometric problem-solving.…
Modelling cosmic ray electron physics in cosmological smoothed particle hydrodynamics simulation
Dongchao Zheng, Weitian Li, Zhenghao Zhu +5
Cosmic ray electron (CRE) acceleration and cooling are important physical processes in astrophysics. We develop an approximative framework to treat CRE physics in the parallel smoo…