arXiv subjects

Hao Hei

Publications and source records attributed to Hao Hei.

3 recordsLinked to original sources

arXiv2026

MLT-Dedup: Efficient Large-Scale Online Video Deduplication via Multi-Level Representations and Spatial-Temporal Matching

The explosive growth of user-generated video content on online platforms is accompanied by the emergence of numerous near-duplicate videos--videos that are identical or highly similar but differ by partial edits. These duplicates degrade user experience and increase storage and bandwidth costs, making large-scale video deduplication a critical task. Existing video deduplication frameworks face a fundamental challenge in retrieving sufficient high-quality candidates under a limited index budget, as well as trade-offs between efficiency and precision. To address these issues, we propose MLT-Dedup, an efficient large-scale online video deduplication framework with Multi-Level representations and spatial-Temporal matching. Our approach employs a Multi-Level Video Encoder (ML-VE) to extract both fine-grained frame-level and sparse clip-level embeddings: sparse embeddings support efficient candidate retrieval, while fine-grained embeddings are loaded for precise pairwise matching. During matching, we introduce DiF-SiM, a Differential Feature-enhanced Similarity Module capable of locating duplicated temporal segments and providing reliable similarity evidence to support policy-driven deduplication decisions. Extensive experiments on a real-world large-scale platform demonstrate that MLT-Dedup reduces online repetition rates by 91% at 90% precision. Furthermore, our sparse retrieval design achieves a 5x increase in indexing capacity, enabling broader candidate coverage in real-world deployment.

cs.CV↗

arXiv2023

Internal structures of the baryons $Ξ(2030)$ and $Ξ(2120)$

Currently, there is much controversy surrounding the interpretation of the $Ξ(2030)$ and $Ξ(2012)$ as traditional hadrons containing double strange quarks. In particular, the ratios of the partial decay widths into $Λ\bar{K}$ and $Σ\bar{K}$ for $Ξ(2030)$ cannot obtain a suitable explanation under the $qss$ three quark structure~\cite{Xiao:2013xi}. Thus, we suggest the $Ξ(2030)$ and $Ξ(2012)$ to be $VB(=\bar{K}^{*}Σ/ρΞ/\bar{K}^{*}Λ/ϕΞ/ωΞ)$ molecular states. In this work, we perform a systematical investigation of possible molecular states from the $VB(=\bar{K}^{*}Σ/ρΞ/\bar{K}^{*}Λ/ϕΞ/ωΞ)$ interaction. The interaction of the system considered is described by the $t$-channel vector ($ρ,ω,ϕ,\bar{K}^{*}$) and pseudoscalar ($π,η,\bar{K}$) mesons exchanges. By solving the non-relativistic Schrödinger equation with the obtained one-boson-exchange potentials, the $VB(=\bar{K}^{*}Σ/ρΞ/\bar{K}^{*}Λ/ϕΞ/ωΞ)$ bound states with different quantum numbers are searched. The calculation suggests that $Ξ(2030)$ can be assigned as a $P$-wave $\bar{K}^{*}Σ/ρΞ/\bar{K}^{*}Λ/ϕΞ/ωΞ$ molecular state with spin parity $J^P=5/2^{+}$. The calculation also predict the existence of four $\bar{K}^{*}Σ/ρΞ/\bar{K}^{*}Λ/ϕΞ/ωΞ$ bound states with $J^P=1/2^{\pm}$ and $J^P=3/2^{\pm}$. The $Ξ(2012)$ may be a candidate for one of these four bound states. If $Ξ(2012)$ is an $S$-wave molecular state with $J^P=1/2^{-}$ or $J^P=3/2^{-}$, we suggest determining its spin and parity by studying its decay width, owing to the difference in their molecular components.

hep-ph↗

arXiv2023

Production of the newly observed $\bar{T}_{c\bar{s}0}$ by kaon-induced reactions on a proton/neutron target

Recently, a new doubly charged tetraquark $T^{a}_{c\bar{s}0}(2900)^{++}$ and its neutral partner $T^{a}_{c\bar{s}0}(2900)^0$ at the invariant mass spectrum of $πD_s$ were observed by the LHCb Collaboration. According to its properties, such as the mass and decay width, the $T^{a}_{c\bar{s}0}(2900)^{++/0}$ have been suggested to be a compact multi-quark state or a hadron molecule. In order to distinguish the various interpretations of the $T^{a}_{c\bar{s}0}(2900)^{++/0}$, we investigate the possibility to study the $\bar{T}^{a}_{c\bar{s}0}(2900)$ [the antiparticle of $T^{a}_{c\bar{s}0}(2900)$] by kaon-induced reactions on a proton target in an effective Lagrangian approach. The production mechanism is characterized by the $t$-channel $D$ meson exchange. Our theoretical approach is based on the assumption that $\bar{T}^{a}_{c\bar{s}0}(2900)$ can be either a $K^{*}D^{*}-D_s^{*}ρ$ molecule or a compact tetraquark state. Using the coupling constants of the $\bar{T}^{a}_{c\bar{s}0}(2900)$ to $KD$ channel obtained from molecule or compact tetraquark picture of the $\bar{T}^{a}_{c\bar{s}0}(2900)$, we compute the cross-sections for the process $K^{-}n\to{}\bar{T}^{a}_{c\bar{s}0}(2900)^{--}Λ^{+}_c$. The $\bar{K}N$ initial state interaction mediated by Pomeron and Reggeon exchanges is also included, which reduces the production of the $\bar{T}^{a}_{c\bar{s}0}(2900)$. Our calculations show that whether $\bar{T}^{a}_{c\bar{s}0}(2900)$ is a molecule or a compact tetraquark state, the cross-sections for the $K^{-}n\to{}\bar{T}^{a}_{c\bar{s}0}(2900)^{--}Λ^{+}_c$ reaction are of similar magnitude, ranging from approximately 0.075 nb to 0.270 nb.

hep-ph↗