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Haibo Lin

Haibo Lin appears in the imported research catalog. Authorship, coauthor and topic links are available while profile ownership is still unclaimed.

ResearcherUnclaimed source record
math.CAmath.FAInformation RetrievalMachine Learningmath.APphysics.med-phq-fin.MFq-fin.STSocial and Information Networks

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Published work

9 published item(s)

preprint2026arXiv

Intelligent Elastic Feature Fading: Enabling Model Retrain-Free Feature Efficiency Rollouts at Scale

Large-scale ranking systems depend on thousands of features derived from user behavior across multiple time horizons. Typically requires model retraining -- resulting in long iteration cycles (3--6 months), substantial GPU resource consumption, and limited rollout throughput. We introduce Intelligent Elastic Feature Fading (IEFF), a production infrastructure system that enables retrain-free feature efficiency rollouts by elastically controlling feature coverage and distribution at serving time. IEFF supports incremental feature coverage adjustments while models adapt through recurring training, eliminating dependencies on explicit retraining cycles. The system incorporates strict safety guardrails, reversibility mechanisms, and comprehensive monitoring to ensure stability at scale. Across multiple production use cases, IEFF accelerates efficiency-related rollouts by 5$\times$, eliminates retraining-related GPU overhead, and enables faster capacity recycling. Extensive offline and online experiments demonstrate that gradual feature fading prevents 50--55\% of online performance degradation compared to abrupt feature removal, while maintaining stable model behavior. These results establish elastic, system-level feature fading as a practical and scalable approach for managing feature efficiency in modern industrial ranking systems.

0 citations0 reviewsNo code linkedOpen access
preprint2022arXiv

Recent Progress in Pencil Beam Scanning FLASH Proton Therapy: A Narrative Review

Background and Objective: Recent experimental studies using ultra-high dose rate radiation therapy (FLASH-RT) have shown improved normal tissue sparing and comparable tumor control compared to conventional dose rate RT. Pencil beam scanning (PBS) proton therapy with superior dosimetry characteristics has begun to draw attention to the delivery of conformal FLASH-RT for preclinical studies. This review aims to provide recent updates on the development of PBS FLASH-RT. Methods: The information summarized in this review article is based on search results in databases such as PubMed and search engines like Google Scholar, with keywords including pencil beam scanning, proton therapy, proton FLASH, Bragg peak FLASH, etc., with English articles from the year of 2014-2022. Content and Findings: This review summarizes of recent developments in PBS FLASH proton therapy (FLASH-PT), including PBS dose rate characterization, current delivery limitations, treatment planning, and biological investigations. Conclusions: As PBS FLASH delivery has enabled successful biological studies using transmission beams, the further improvement in PBS Bragg peak FLASH technologies will result in more advanced treatment plans associated with potentially improved outcomes.

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preprint2022arXiv

Stability of China's Stock Market: Measure and Forecast by Ricci Curvature on Network

The systemic stability of a stock market is one of the core issues in the financial field. The market can be regarded as a complex network whose nodes are stocks connected by edges that signify their correlation strength. Since the market is a strongly nonlinear system, it is difficult to measure the macroscopic stability and depict market fluctuations in time. In this paper, we use a geometric measure derived from discrete Ricci curvature to capture the higher-order nonlinear architecture of financial networks. In order to confirm the effectiveness of our method, we use it to analyze the CSI 300 constituents of China's stock market from 2005--2020 and the systemic stability of the market is quantified through the network's Ricci type curvatures. Furthermore, we use a hybrid model to analyze the curvature time series and predict the future trends of the market accurately. As far as we know, this is the first paper to apply Ricci curvature to forecast the systemic stability of domestic stock market, and our results show that Ricci curvature has good explanatory power for the market stability and can be a good indicator to judge the future risk and volatility of the domestic market.

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preprint2015arXiv

Boundedness of Commutators on Hardy Spaces over Metric Measure Spaces of Non-homogeneous Type

Let $(\mathcal{X},d,μ)$ be a metric measure space satisfying the so-called upper doubling condition and the geometrically doubling condition. Let $T$ be a Calderón-Zygmund operator with kernel satisfying only the size condition and some Hörmander-type condition, and $b\in\rm{\widetilde{RBMO}(μ)}$ (the regularized BMO space with the discrete coefficient). In this paper, the authors establish the boundedness of the commutator $T_b:=bT-Tb$ generated by $T$ and $b$ from the atomic Hardy space $\widetilde{H}^1(μ)$ with the discrete coefficient into the weak Lebesgue space $L^{1,\,\infty}(μ)$. The boundedness of the commutator generated by the generalized fractional integral $T_α\,(α\in(0,1))$ and the $\rm{\widetilde{RBMO}(μ)}$ function from $\widetilde{H}^1(μ)$ into $L^{1/{(1-α)},\,\fz}(μ)$ is also presented. Moreover, by an interpolation theorem for sublinear operators, the authors show that the commutator $T_b$ is bounded on $L^p(μ)$ for all $p\in(1,\infty)$.

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preprint2014arXiv

Hardy spaces $H^p$ over non-homogeneous metric measure spaces and their applications

Let $({\mathcal X},d,μ)$ be a metric measure space satisfying both the geometrically doubling and the upper doubling conditions. Let $ρ\in (1,\infty)$, $0<p\le1\le q\le\infty$, $p\neq q$, $γ\in[1,\infty)$ and $ε\in(0,\infty)$. In this article, the authors introduce the atomic Hardy space ${\widetilde H_{\mathrm{atb},\,ρ}^{p,\,q,\,γ}(μ)}$ and the molecular Hardy space ${\widetilde H_{\rm{mb},\,ρ}^{p,\,q,\,γ,\,ε}(μ)}$ via the discrete coefficient $\widetilde{K}^{(ρ),\,p}_{B,\,S}$, and prove that the Calderón-Zygmund operator is bounded from ${\widetilde H_{\rm{mb},\,ρ}^{p,\,q,\,γ,\,δ}(μ)}$ (or ${\widetilde H_{\rm{atb},\,ρ}^{p,\,q,\,γ}(μ)}$) into $L^p(μ)$, and from ${\widetilde H_{\rm{atb},\,ρ(ρ+1)}^{p,\,q,\,γ+1}(μ)}$ into ${\widetilde H_{\rm{mb},\,ρ}^{p,\,q,\,γ,\,\frac12(δ-\fracν{p}+ν)}(μ)}$ whose genealized fractional versions are also obtained. The authors also introduce the $ρ$-weakly doubling condition, with $ρ\in (1,\infty)$, of the measure $μ$ and construct a non-doubling measure $μ$ satisfying this condition. If $μ$ is $ρ$-weakly doubling, the authors further introduce the Campanato space ${\mathcal E}^{α,\,q}_{ρ,\,η,\,γ}(μ)$ and show that ${\mathcal E}^{α,\,q}_{ρ,\,η,\,γ}(μ)$ is independent of the choices of $ρ$, $η$, $γ$ and $q$; the authors then introduce the atomic Hardy space $\widehat H_{\rm{atb},\,ρ}^{p,\,q,\,γ}(μ)$ and the molecular Hardy space $\widehat H_{\rm{mb},\,ρ}^{p,\,q,\,γ,\,ε}(μ)$, which coincide with each other; the authors finally prove that $\widehat{H}_{\rm{atb},\,ρ}^{p,\,q,\,γ}(μ)$ is the predual of ${\mathcal E}^{1/p-1,\,1}_{ρ,\,ρ,\,1}(μ)$. Moreover, relations of these Hardy spaces are also discussed.

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preprint2013arXiv

Equivalent boundedness of Marcinkiewicz integrals on non-homogeneous metric measure spaces

Let $({\mathcal X},\,d,\,μ)$ be a metric measure space satisfying the upper doubling condition and the geometrically doubling condition in the sense of T. Hytönen. In this paper, the authors prove that the $L^p(μ)$ boundedness with $p\in(1,\,\infty)$ of the Marcinkiewicz integral is equivalent to either of its boundedness from $L^1(μ)$ into $L^{1,\infty}(μ)$ or from the atomic Hardy space $H^1(μ)$ into $L^1(μ)$. Moreover, the authors show that, if the Marcinkiewicz integral is bounded from $H^1(μ)$ into $L^1(μ)$, then it is also bounded from $L^\infty(μ)$ into the space ${\mathop\mathrm{RBLO}}(μ)$ (the regularized {\rm BLO}), which is a proper subset of ${\rm RBMO}(μ)$ (the regularized {\rm BMO}) and, conversely, if the Marcinkiewicz integral is bounded from $L_b^\infty(μ)$ (the set of all $L^\infty(μ)$ functions with bounded support) into the space ${\rm RBMO}(μ)$, then it is also bounded from the finite atomic Hardy space $H_{\rm fin}^{1,\,\infty}(μ)$ into $L^1(μ)$. These results essentially improve the known results even for non-doubling measures.

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preprint2012arXiv

An Interpolation Theorem for Sublinear Operators on Non-homogeneous Metric Measure Spaces

Let $({\mathcal X}, d, μ)$ be a metric measure space and satisfy the so-called upper doubling condition and the geometrically doubling condition. In this paper, the authors establish an interpolation result that a sublinear operator which is bounded from the Hardy space $H^1(μ)$ to $L^{1,\,\infty}(μ)$ and from $L^\infty(μ)$ to the BMO-type space ${\mathop\mathrm{RBMO}}(μ)$ is also bounded on $L^p(μ)$ for all $p\in(1,\,\infty)$. This extension is not completely straightforward and improves the existing result.

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preprint2010arXiv

Boundedness of Lusin-area and $g_λ^\ast$ Functions on Localized BMO Spaces over Doubling Metric Measure Spaces

Let ${\mathcal X}$ be a doubling metric measure space. If ${\mathcal X}$ has the $δ$-annular decay property for some $δ\in (0,\,1]$, the authors then establish the boundedness of the Lusin-area function, which is defined via kernels modeled on the semigroup generated by the Schrödinger operator, from localized spaces ${\rm BMO}_ρ({\mathcal X})$ to ${\rm BLO}_ρ({\mathcal X})$ without invoking any regularity of considered kernels. The same is true for the $g^\ast_\labda$ function and unlike the Lusin-area function, in this case, ${\mathcal X}$ is not necessary to have the $δ$-annular decay property. Moreover, for any metric space, the authors introduce the weak geodesic property and the monotone geodesic property, which are proved to be respectively equivalent to the chain ball property of Buckley. Recall that Buckley proved that any length space has the chain ball property and, for any metric space equipped with a doubling measure, the chain ball property implies the $δ$-annular decay property for some $δ\in (0,1]$. Moreover, using some results on pointwise multipliers of ${\rm bmo}({\mathbb R})$, the authors construct a counterexample to show that there exists a nonnegative function which is in ${\rm bmo}({\mathbb R})$, but not in ${\rm blo}({\mathbb R})$; this further indicates that the above boundedness of the Lusin-area and $g^\ast_λ$ functions even in ${\mathbb R}^d$ with the Lebesgue measure or the Heisenberg group also improves the existing results.

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preprint2010arXiv

Spaces of Type BLO on Non-homogeneous Metric Measure Spaces

Let $({\mathcal X}, d, μ)$ be a metric measure space and satisfy the so-called upper doubling condition and the geometrically doubling condition. In this paper, the authors introduce the space ${\mathop\mathrm{RBLO}}(μ)$ and prove that it is a subset of the known space ${\mathop\mathrm{RBMO}}(μ)$ in this context. Moreover, the authors establish several useful characterizations for the space ${\mathop\mathrm{RBLO}}(μ)$. As an application, the authors obtain the boundedness of the maximal Calderón-Zygmund operators from $L^\infty(μ)$ to ${\mathop\mathrm{RBLO}}(μ)$.

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