The Kratos Framework for Hetrogeneous Astrophysical Simulations: Fundamental Infrastructures and Hydrodynamics

Kavli Affiliate: Lile Wang | First 5 Authors: Lile Wang, , , , | Summary: The field of astrophysics has long sought computational tools capable of harnessing the power of modern GPUs to simulate the complex dynamics of astrophysical phenomena. The Kratos Framework, a novel GPU-based simulation system designed to leverage heterogeneous computing architectures, is […]


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SDPO: Segment-Level Direct Preference Optimization for Social Agents

Kavli Affiliate: Ke Wang | First 5 Authors: Aobo Kong, Wentao Ma, Shiwan Zhao, Yongbin Li, Yuchuan Wu | Summary: Social agents powered by large language models (LLMs) can simulate human social behaviors but fall short in handling complex goal-oriented social dialogues. Direct Preference Optimization (DPO) has proven effective in aligning LLM behavior with human […]


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FEASTS: Radial Distribution of HI surface densities down to 0.01 M$_{odot}$ pc$^{-2}$ of 35 Nearby Galaxies

Kavli Affiliate: Jing Wang | First 5 Authors: Jing Wang, Dong Yang, Xuchen Lin, Qifeng Huang, Zhijie Qu | Summary: We present the HI surface density ($Sigma_{rm HI}$) radial distributions based on total-power HI images obtained by FAST in the FEASTS program, for 35 galaxies with inclinations lower than 72 degree. We derive the HI […]


Continue.. FEASTS: Radial Distribution of HI surface densities down to 0.01 M$_{odot}$ pc$^{-2}$ of 35 Nearby Galaxies

VideoRefer Suite: Advancing Spatial-Temporal Object Understanding with Video LLM

Kavli Affiliate: Li Xin Li | First 5 Authors: Yuqian Yuan, Hang Zhang, Wentong Li, Zesen Cheng, Boqiang Zhang | Summary: Video Large Language Models (Video LLMs) have recently exhibited remarkable capabilities in general video understanding. However, they mainly focus on holistic comprehension and struggle with capturing fine-grained spatial and temporal details. Besides, the lack […]


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VideoRefer Suite: Advancing Spatial-Temporal Object Understanding with Video LLM

Kavli Affiliate: Li Xin Li | First 5 Authors: Yuqian Yuan, Hang Zhang, Wentong Li, Zesen Cheng, Boqiang Zhang | Summary: Video Large Language Models (Video LLMs) have recently exhibited remarkable capabilities in general video understanding. However, they mainly focus on holistic comprehension and struggle with capturing fine-grained spatial and temporal details. Besides, the lack […]


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Online Video Understanding: A Comprehensive Benchmark and Memory-Augmented Method

Kavli Affiliate: Jing Wang | First 5 Authors: Zhenpeng Huang, Xinhao Li, Jiaqi Li, Jing Wang, Xiangyu Zeng | Summary: Multimodal Large Language Models (MLLMs) have shown significant progress in offline video understanding. However, applying these models to real-world scenarios, such as autonomous driving and human-computer interaction, presents unique challenges due to the need for […]


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Gravitational Waves from Post-Collision of Fuzzy Dark Matter Solitons

Kavli Affiliate: Ke Wang | First 5 Authors: Chen Tan, Jing-Kang Bin, Ke Wang, , | Summary: According to the Schr"odinger-Poisson (SP) equations, fuzzy dark matter (FDM) can form a stable equilibrium configuration, the so-called FDM soliton. The SP system can also determine the evolution of FDM solitons, such as head-on collision. In this paper, […]


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2D numerical simulation of lunar response to gravitational waves using finite element method

Kavli Affiliate: Xian Chen | First 5 Authors: Lei Zhang, Han Yan, Xian Chen, Jinhai Zhang, | Summary: Previous studies of the response of the Moon to gravitational waves have been carried out using analytical or semi-analytical models assuming ideal lunar structures. Such models are advantageous for their high-speed calculation but fail to account for […]


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Bulge Oscillation Driven by Outflows of Active Galactic Nuclei. I. Fast Outflow Case

Kavli Affiliate: Luis C. Ho | First 5 Authors: Yue-Chang Peng, Jian-Min Wang, Yu Zhao, Luis C. Ho, | Summary: There is growing evidence for star formation inside outflows of active galactic nuclei (AGNs). The formed stars are injected into bulges and give rise to perturbation of bulges. In this paper, we investigate the issues […]


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Observational Signatures of Disk Winds in Protoplanetary Disks: Differentiating Magnetized and Photoevaporative Outflows With Fully Coupled Thermochemistry

Kavli Affiliate: Lile Wang | First 5 Authors: Xiao Hu, Jaehan Bae, Zhaohuan Zhu, Lile Wang, | Summary: Magnetized winds and photoevaporative winds are critical in shaping protoplanetary disk evolution. Using 2D axisymmetric (magneto-)hydrodynamic simulations with Athena++ implementing fully coupled thermochemistry, we investigate the signatures of the two winds in CO and [C~I] ALMA observations, […]


Continue.. Observational Signatures of Disk Winds in Protoplanetary Disks: Differentiating Magnetized and Photoevaporative Outflows With Fully Coupled Thermochemistry