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2605.15867 2026-05-18 astro-ph.HE

Spectral-Regime Overlap and Transition-like Behavior in the Blazar Population from Multi-Instrument X-ray and TeV Observations

射流谱域重叠与过渡行为在BLazar种群中的表现:多仪器X射线和TeV观测

Javaid Tantry, Naseer Iqbal

AI总结 通过多仪器观测研究BLazar种群中X射线和TeV光子指数的分布与长期演变,发现光子指数空间存在广泛重叠区域,支持连续而非严格分离的谱分布。

Comments 30 pages, 12 figures, 7 tables, comments are welcome

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AI中文摘要

BLazars传统上分为BL Lac对象和扁谱射电类星体(FSRQs),分别与辐射效率低和高的吸积有关。然而,越来越多的证据表明这种划分并不严格离散,一些源处于中间或过渡状谱态。由于光子指数反映了非热发射光谱的变化,它提供了研究喷流能量、粒子加速和辐射过程的有用探测。利用Swift-XRT、Swift-BAT、NuSTAR、ROSAT、Chandra、XMM-Newton、NICER、AstroSat、TeVcat和存档VizieR编目数据,我们研究了多个BLazar子类中X射线和TeV光子指数的分布和长期演变。我们发现光子指数空间中存在广泛重叠区域,连接EHBL、HBL、IBL、LBL和FSRQ-like种群,表明连续而非严格分离的谱分布。在X射线仪器中,中间区域集中在Γ_X≈2,通常跨度为Γ_X≈1.5--2.2。多epoch观测揭示了显著的源内谱演变,包括Mrk 421的随机变化和OJ 287的态依赖性过渡。一些源显示出ΔΓ_X>0.5的谱指数变化,而中间区域的占用率为22-43%。多个对象反复穿越连接传统不同子类的谱区域,支持其作为候选过渡状BLazar的解释。总体而言,结果支持一个框架,其中BLazar子类代表重叠和演变的谱种群,由长期的喷流发射和辐射过程变化驱动。

英文摘要

Blazars are conventionally classified into BL Lac objects and flat-spectrum radio quasars (FSRQs), commonly associated with radiatively inefficient and efficient accretion onto supermassive black holes, respectively. Increasing evidence, however, suggests that this division is not strictly discrete, with several sources occupying intermediate or transition-like spectral states. Since the photon index traces the evolution of the non-thermal emission spectrum, it provides a useful probe of jet energetics, particle acceleration, and radiative processes across blazar populations. Using multi-mission observations from Swift-XRT, Swift-BAT, NuSTAR, ROSAT, Chandra, XMM-Newton, NICER, AstroSat, TeVcat, and archival VizieR compilations, we investigate the distribution and long-term evolution of X-ray and TeV photon indices across multiple blazar subclasses. We identify broad overlap regions in photon-index space linking EHBL, HBL, IBL, LBL, and FSRQ-like populations, suggesting a continuous rather than sharply separated spectral distribution. Across X-ray instruments, the intermediate regime is concentrated near $Γ_{\mathrm{X}} \approx 2$, typically spanning $Γ_{\mathrm{X}} \sim 1.5$--$2.2$. Multi-epoch observations reveal substantial intra-source spectral evolution, including stochastic variability in Mrk~421 and state-dependent transitions in OJ~287. Several sources exhibit spectral-index changes of $ΔΓ_{\mathrm{X}} > 0.5$, while occupancy of the intermediate regime reaches $\sim22$--$43%$ depending on instrument. Multiple objects repeatedly traverse spectral regions connecting traditionally distinct subclasses, supporting their interpretation as candidate transition-like blazars. Overall, the results favor a framework in which blazar subclasses represent overlapping and evolving spectral populations driven by long-term changes in jet emission and radiative processes.

2605.15866 2026-05-18 cs.DC

Evaluating Container Orchestration for Neuromorphic Workloads in Virtual Edge Environments

评估神经形态工作负载在虚拟边缘环境中的容器编排

Huyen Pham, Bilhanan Silverajan

AI总结 本文研究了在虚拟边缘环境中使用Kubernetes部署和编排SNN工作负载的可行性,探讨了资源限制对端到端延迟、吞吐量和分类准确率的影响,揭示了容器编排配置的重要性。

Comments 7 pages, 8 figures

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AI中文摘要

随着边缘计算的普及,对能在严格资源和能源约束下运行的工作负载需求日益增加。神经形态计算,尤其是脉冲神经网络(SNNs),通过事件驱动计算为传统机器学习提供了更高效的替代方案。然而,SNN工作负载在现代容器编排框架中,尤其是在边缘环境中,其行为仍鲜有研究。本文探讨了在虚拟边缘环境中使用Kubernetes部署和编排SNN工作负载的可行性,重点研究端到端延迟、吞吐量、分类准确率、基础设施开销以及并发负载下的运行行为。实验在单节点K3d集群上进行,结果表明SNN工作负载对资源可用性高度敏感。限制CPU至0.5核心使中位延迟增加47.6倍,吞吐量减少49倍,而最受限的配置因内存不足而失败。分类准确率在所有工作配置中保持稳定。从编排角度看,K3d成功部署并扩展了SNN工作负载,但其默认的轮询路由策略在副本扩展时引入了显著的尾部延迟,突显了无状态负载均衡假设与长运行推理工作负载之间的不匹配。本文为在容器化边缘环境中部署神经形态工作负载提供了基准,并强调了资源分配和编排配置的重要性。未来的工作应探索改进的路由策略、内存优化以及在物理边缘硬件上的验证。

英文摘要

The growing adoption of edge computing has created an increasing need for workloads capable of operating under strict resource and energy constraints. Neuromorphic computing, and spiking neural networks (SNNs) in particular, offers an energy-efficient alternative to conventional machine learning through event-driven computation. However, how SNN workloads behave when deployed within modern container orchestration frameworks, especially in edge environments, remains largely unexplored. This paper investigates the feasibility of deploying and orchestrating SNN workloads in a virtual edge environment using Kubernetes, focusing on end-to-end latency, throughput, classification accuracy, infrastructure overhead, and runtime behavior under concurrent load. Experiments were conducted on a single-node K3d cluster running on a Windows 11 host with WSL2 and Docker Desktop. The results show that SNN workloads are highly sensitive to resource availability. Restricting CPU to 0.5 cores increased median latency by 47.6x and reduced throughput by 49x, while the most constrained configuration failed due to insufficient memory. Classification accuracy remained stable across all working configurations. From an orchestration perspective, K3d successfully deployed and scaled SNN workloads, though its default round-robin routing policy introduced significant tail latency under replica scaling, highlighting a mismatch between stateless load-balancing assumptions and long-running inference workloads. Overall, this study provides a baseline for deploying neuromorphic workloads in containerized edge environments and highlights the importance of resource provisioning and orchestration configuration. Future work should explore improved routing strategies, memory optimization, and validation on physical edge hardware.

2605.15865 2026-05-18 cs.SE

From Text to DSL: Evaluating Grammar-Based Model Generation Using Open LLMs

从文本到DSL:利用开源LLMs评估基于语法的模型生成

Junaid Baber, Nicolas Hili, Didier Schwab, Léo Challier, Cécilia Satrin

AI总结 本文评估了不同规模的开源LLMs在无需微调的情况下,通过少量示例提示生成符合DSL的模型的能力,验证了小型开源LLMs在MDE中的可行性。

Comments This version includes corrections to several malformed references and incorrect arXiv links that appeared in the published conference version

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AI中文摘要

大型语言模型(LLMs)在自动化模型驱动软件工程任务中展现出越来越大的潜力,特别是在从自然语言生成符合领域特定语言(DSL)的模型方面。尽管大多数现有方法依赖于大型专有模型,但其高昂的成本和有限的部署性阻碍了更广泛的应用。本文评估了不同规模(0.5B到32B参数)的开源LLMs是否能仅通过少量示例提示生成符合DSL的模型,而无需任何微调。评估重点在于关键的模型驱动工程(MDE)需求,包括语法有效性、语义完整性和跨模型引用一致性。我们通过扩展先前的工作,从生成用户界面模型(本文称为“UI模型”)和固定预定义数据模式(“数据模型”)转向完全从头生成UI和数据模型。这种转变有两方面的目的:首先,它突显了LLM推断领域特定关系并保持多个互联模型之间一致性的能力;其次,它使我们能够通过在不同性质和结构角色的模型上测试DSL生成来推广先前的发现。我们的结构化评估结合了自动解析和专家反馈,对39个LLM进行了评估,发现几个紧凑的模型(如gemma3:12b、mistral:7b-instruct)在质量上接近或达到了更大模型的水平。这些发现证明了在MDE工作流中使用小型开源LLMs生成符合语法的DSL的可行性,为闭源LLMs提供了一种更具成本效益和可部署性的替代方案。

英文摘要

Large Language Models (LLMs) have shown increasing potential in automating model-driven software engineering tasks, particularly in generating models conforming to Domain Specific Languages (DSLs) from natural language. While most existing approaches rely on large proprietary models, their high cost and limited deployability hinder broader adoption. In this paper, we evaluate whether open-source LLMs of varying sizes (0.5B to 32B parameters) can generate DSL-conformant models using only few-shot prompting, without any fine-tuning. Our evaluation focuses on key model-driven engineering (MDE) requirements, including syntactic validity, semantic completeness, and inter-model reference consistency. We extend our prior work by moving from generating user interface models (referred to as "UI models" in this paper) over fixed, predefined data schemas ("data models") to generating both the UI and data models entirely from scratch. This shift serves two purposes: first, it highlights the LLM's ability to infer domain-specific relationships and maintain consistency across multiple interconnected models; second, it allows us to generalize earlier findings by testing DSL generation across models of different natures and structural roles. Our structured evaluation combines automatic parsing and expert feedback across 39 LLMs, revealing that several compact models (e.g., \texttt{gemma3:12b}, \texttt{mistral:7b-instruct}) approach or match the quality of much larger models. These findings demonstrate the feasibility of using smaller, open-source LLMs for grammar-conformant DSL generation in MDE workflows, offering a cost-effective and deployable alternative to closed LLMs.

2605.15863 2026-05-18 quant-ph physics.optics

Gauge-Engineered Tunable Mode Selection in Non-Hermitian Directed-Graph Networks

非厄米特定向图网络中的 gauge 工程可调模式选择

Wenwen Liu, Zhang Shuang

AI总结 本文提出一种 gauge 工程方法,在支持几何保护纯衰减模式的非厄米特定向图网络中实现模式选择,通过合成 gauge 场可调纯衰减模式,并应用于单模激光、传感器和量子处理。

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AI中文摘要

非厄米特物理为开放量子和波系统提供了新的控制手段,但选择性隔离单个模式仍具挑战性。本文引入了一种在支持几何保护纯衰减模式的定向图网络中,通过相位补偿非互易跃迁添加合成 gauge 场的方法,可将任意纯衰减模式提升至主导位置,同时保持其振幅分布。该方法可扩展至半连接图中同时选择成对模式,并通过正交折叠实现更高维度的可定制多模式分布。该方法实现了稳健、无损耗/增益的模式控制,推动了单模激光、传感器和量子处理的应用。

英文摘要

Non-Hermitian physics enables novel control over open quantum and wave systems, but selectively isolating individual modes without delicate balancing of gain and loss remains challenging. Here we introduce a gauge-engineering method in directed-graph networks that support geometry-protected pure decay modes-eigenstates exhibiting smooth exponential amplitude decay along directed paths. In fully connected configurations, a single dominant mode naturally emerges with a large, tunable energy gap from the rest. By adding synthetic gauge fields via phase-compensated non-reciprocal hopping, we can promote any desired pure decay mode to the dominant position, while preserving its amplitude profile. The approach extends to simultaneous selection of paired modes in half-connected graphs and customizable multi-mode distributions in higher dimensions via orthogonal folding. Our method enables robust, loss/gain-free control over mode profiles, advancing applications in single-mode lasers, sensors, and quantum processing.

2605.15861 2026-05-18 math.OA math.QA

A new perspective on spectra of quantum spaces

量子空间谱的全新视角

Arnaud Brothier

AI总结 本文研究量子空间关联的C*-代数谱,引入非自伴算子代数A及其表示 functor,并构造参数化C(X)谱的一维表示。

Comments 15 pages

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AI中文摘要

我们考虑与量子空间(如球面、射影空间和棱镜空间)相关的C*-代数C(X)类。我们引入非自伴算子代数A及其从A表示范畴到C(X)表示范畴的显式函子。然后显式构造一组参数化C(X)整个谱的一维A表示。

英文摘要

We consider a class of C*-algebras C(X) associated with quantum spaces such as spheres, projective spaces, and lens spaces. We introduce a non-self-adjoint operator algebra A together with an explicit functor from the category of representations of A to that of C(X). We then construct explicitly a family of one-dimensional representations of A that parametrise the entire spectrum of C(X).

2605.15856 2026-05-18 stat.CO

crossfit: A Graph-Based Cross-Fitting Engine in R

crossfit: 一种基于图的交叉拟合引擎

Etienne Peyrot, François Petit

AI总结 crossfit提供了一种通用的交叉拟合引擎,支持通过指定目标函数和有向无环图来估计低维目标,具备可重复的调度和可审计的流程,适用于模拟密集型的基准测试和方法开发。

Comments 25 pages, 1 figure

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AI中文摘要

交叉拟合是许多半参数估计程序中的关键组成部分,如双/去偏机器学习(DML),通过强制使用外样本的干扰预测,能够有效估计低维目标。crossfit是一个R包,提供了一个通用的、估计器无关的交叉拟合引擎。用户指定(i)目标函数和(ii)有向无环图(DAG)的干扰模型,其中每个节点有特定的训练折叠宽度和目标特定的评估窗口。引擎在折叠、面板和重复上执行可重复的调度,返回标量估计(mode=

英文摘要

Cross-fitting is a key ingredient in many semiparametric estimation procedures, such as double/debiased machine learning (DML), enabling valid estimation of low-dimensional targets in the presence of high-dimensional nuisance functions by enforcing out-of-sample use of nuisance predictions. crossfit is an R package that provides a general-purpose, estimator-agnostic cross-fitting engine. Users specify (i) a target functional and (ii) a directed acyclic graph (DAG) of nuisance models, with node-specific training fold widths and target-specific evaluation windows. The engine executes a reproducible schedule over folds, panels, and repetitions, returning either a scalar estimate (mode="estimate") or a cross-fitted predictor function for application to new data (mode="predict"). Beyond standard cross-fitting, crossfit implements fold-allocation modes that control how training data are shared across nuisance components, including disjoint and independence-enforcing allocations that duplicate reused nodes to reduce dependence between nuisance branches. The implementation targets simulation-heavy benchmarking and method development, with explicit and auditable schedules, defensive validation of specifications and nuisance dependencies, reuse-aware caching to avoid redundant refits, and failure isolation policies for large experiment grids. The crossfit package is available on CRAN, openly developed on GitHub under GPL-3, and is intended as a lightweight, tested foundation to prototype and empirically evaluate cross-fitted estimators with explicit control over fold geometry, dependence, and computation.

2605.15854 2026-05-18 eess.AS

Improving Automatic Speech Recognition for Speakers Treated for Oral Cancer using Data Augmentation and LLM Error Correction

通过数据增强和大语言模型错误校正提升口腔癌患者语音识别性能

Hidde Folkertsma, Thomas Tienkamp, Sebastiaan de Visscher, Max Witjes, Rob van Son, Jiapan Guo, Bence Mark Halpern

AI总结 本文通过数据增强和大语言模型错误校正技术,有效提升了口腔癌患者语音识别的性能,实验结果显示在Whisper和MMS模型上分别实现了40%和50%的词错误率降低。

Comments 7 pages, 3 tables. Accepted by EMBC 2026

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AI中文摘要

近年来,自动语音识别(ASR)系统性能取得了显著进步。然而,对于如口腔癌(OC)治疗患者等存在语音障碍的人群,ASR性能仍落后于正常人群。OC语音数据的稀缺性和变异性使得开发此类语音的ASR模型极具挑战性。本文采用数据增强和大语言模型(LLM)错误校正技术来缓解这一问题。我们对荷兰语口腔癌语音语料应用了多种增强技术生成合成数据,并评估其对ASR性能的影响。我们对Whisper和多语言语音(MMS)模型进行微调,发现包含使用文本到语音(TTS)生成的数据时,平均词错误率(WER)下降8%。当使用LLM进行错误校正时,微调后的ASR模型WER进一步下降21.4-26.2%,而非微调模型下降10.0%。总体而言,我们实现了Whisper模型40%和MMS模型50%的WER下降,表明数据增强与LLM校正的结合是识别OC语音的有效策略。

英文摘要

In recent years, the performance of automatic speech recognition (ASR) systems has made considerable progress. Unfortunately, for people with speech impairments, such as people treated for oral cancer (OC), ASR performance is still lagging behind. The scarcity and variability of OC speech data makes development of ASR models for this type of speech difficult. In this work, we use data augmentation and large language model (LLM) error correction to mitigate this problem. We apply various augmentation techniques on a corpus of Dutch oral cancer speech to create synthetic data, and evaluate their effect on ASR performance. We finetune Whisper and Massively Multilingual Speech (MMS) models for each augmentation technique and observe, on average, an 8% relative decrease in Word Error Rate (WER) when including data created using text-to-speech (TTS). When employing LLMs for error correction, we see a further 21.4-26.2% relative decrease in WER for finetuned ASR models and a 10.0% relative decrease for non-finetuned models. Overall, we achieve a 40% relative WER decrease for Whisper and a 50% relative WER decrease for MMS, indicating that a combination of data augmentation and LLM correction is a viable strategy for the recognition of OC speech.

2605.15853 2026-05-18 hep-ph hep-ex hep-th

Numerical Study of MRW-Type Unintegrated Double Parton Distribution Functions from Non-Factorized DPDFs

MRW类型非因子化双部分子分布函数的数值研究:基于非因子化横动量分布函数

R. Kord Valeshabadi, S. Rezaie, K. Azizi

AI总结 本文研究了基于非因子化横动量分布函数的MRW类型非因子化双部分子分布函数,通过数值双DGLAP演化框架验证了动量守恒规则,探讨了DMKMRW和DVO-MRW模型的归一化和横向动量依赖性,发现非因子化效应在不同模型中表现不同。

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AI中文摘要

双部分子散射为研究强子内部多部分子相关性提供了灵敏探测手段。本文通过数值方法研究了基于非因子化纵向部分子分布函数(LDPDFs)构建的非因子化双部分子分布函数。输入采用GS09 DPDFs,并通过数值双DGLAP演化框架将其演变为不等尺度,该框架通过对应的动量守恒规则进行了验证。我们研究了受MRW启发的生成双部分子横向动量依赖性的预设方案。特别是研究了双修改KMRW方法(DMKMRW)、双虚序MRW(DVO-MRW)模型及其归一化匹配版本。这些预设可以直接应用于完整的纵向部分子分布函数,包括其非均匀部分,并避免了传统LO-MRW构造中所需的分段处理。我们分析了所得分布的归一化、横向动量依赖性、味依赖性和对纵向部分子分布函数相关性的敏感性。DMKMRW模型通过构造具有归一化保持性,而DVO-MRW模型显示出非平凡的归一化偏差,这些偏差在匹配版本中被消除。非因子化效应强烈依赖于通道:在DMKMRW中,它们主要通过纵向部分子分布函数相关性进入,而在虚序模型中,它们还修改横向动量形状。最大的偏差出现在双部分子动力学边界附近以及受价数和夸克-反夸克相关性影响的通道中。

英文摘要

Double parton scattering provides a sensitive probe of multi parton correlations inside hadrons. In this work we present a numerical study of unintegrated double parton distribution functions constructed from non-factorized collinear DPDFs. As input we use the GS09 DPDFs and evolve them to unequal scales with a numerical double DGLAP evolution framework, which is validated through the corresponding momentum sum rule. We investigate MRW-inspired prescriptions for generating transverse momentum dependence in the double parton case. In particular, we study the double modified KMRW approach (DMKMRW), the double virtuality ordered MRW (DVO-MRW) model, and a normalization-matched version of the latter. These prescriptions can be applied directly to the full collinear DPDF, including its non-homogeneous component, and avoid the piecewise treatment required in the conventional LO-MRW construction. We analyze the normalization, transverse momentum dependence, flavor dependence, and sensitivity to longitudinal DPDF correlations of the resulting distributions. The DMKMRW model is normalization preserving by construction, while the DVO-MRW model shows nontrivial normalization deviations that are removed in the matched version. Non-factorized effects are strongly channel dependent: in DMKMRW they enter mainly through longitudinal DPDF correlations, whereas in the virtuality ordered models they also modify the transverse momentum shape. The largest deviations occur near the double parton kinematic boundary and in channels affected by valence-number and quark-antiquark correlations.

2605.15851 2026-05-18 eess.SY cs.SY

Uncertainty Propagation under Residual Disturbances: A Smart-Home Case Study

在残差扰动下的不确定性传播:一个智能家居案例研究

Guanru Pan, Dirk Reinhardt, Sebastien Gros, Timm Faulwasser

AI总结 本文提出了一种数据驱动框架,用于在未测量或统计未建模的扰动下进行不确定性传播。通过残差扰动将所有未结构化扰动整合为一个可从数据中估计的量,结合多项式混沌展开和高阶切比雪夫不等式实现高效不确定性量化。

Comments Accepted by IFAC World congress 2026

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AI中文摘要

本文提出了一种数据驱动框架,用于在未测量或统计未建模(非结构化)扰动下的不确定性传播。我们考虑残差扰动,将所有非结构化扰动整合为一个可从数据中估计的量。在温和假设下,所得随机预测器是因果且分布一致的,从而通过多项式混沌展开和高阶切比雪夫不等式实现高效的不确定性量化。所提出的方法通过挪威智能家居的实验数据进行了验证。

英文摘要

This paper presents a data-driven framework for uncertainty propagation under unmeasured or statistically unmodeled (unstructured) disturbances. We consider residual disturbances, which consolidate all unstructured disturbances into a single quantity that can be estimated from data. Under mild assumptions, the resulting stochastic predictor is causal and distributionally consistent, enabling efficient uncertainty quantification through polynomial chaos expansions and higher-order Chebyshev inequalities. The proposed method is validated using experimental data from a smart home in Norway.

2605.15849 2026-05-18 math.AP

Anisotropic gradient rearrangement of BV functions and applications

BV函数的各向异性梯度重新排列及其应用

Gloria Paoli, Yabo Yang

AI总结 本文提出了一种各向异性设定下BV函数分布梯度的对称化技术,通过分离绝对连续部分与奇异部分,推导出函数与其各向异性对称化的L^1比较,并应用于此类几何泛函的等周不等式。

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AI中文摘要

在本文中,我们介绍了一种对称化技术,用于处理具有有限变分的函数在各向异性设定下的分布梯度。该技术扩展了在欧几里得情况下[Amato-Gentile-Nitsch-Trombetti, 2024]所获得的结果,通过将各向异性梯度的绝对连续部分与其奇异部分分离。我们的主要结果是函数与其各向异性对称化之间的L^1比较。此外,作为应用,我们推导出某些与扭剪刚度相关的几何泛函的等周不等式。

英文摘要

In this paper, we introduce a symmetrization technique for the distributional gradient of a function of bounded variation in the anisotropic setting. This generalizes the result obtained in the Euclidean case in [Amato-Gentile-Nitsch-Trombetti, 2024] by separating the absolutely continuous part of the anisotropic gradient from its singular part. Our main result is an $L^1$ comparison between the function and its anisotropic symmetrization. Moreover, as an application, we derive isoperimetric inequalities for some geometric functionals related to the torsional rigidity.

2605.15847 2026-05-18 stat.ME stat.CO

Bayesian Inference for Non-Conjugate Distance Dependent Chinese Restaurant Process Models

非共轭距离依赖中文餐厅过程模型的贝叶斯推断

Joseph Marsh, Theodore Kypraios, Rowland G. Seymour

AI总结 本文提出了一种基于RJMCMC的框架,用于处理非共轭ddCRP模型中的维度变化问题,通过比较不同提议策略提升推断效率,验证了数据驱动的矩匹配方法在离散和连续观测模型中的有效性。

Comments 23 pages, 6 figures, 1 table. Includes supplementary material. Code available at https://github.com/jmarsh96/non-conjugate-ddcrp

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AI中文摘要

距离依赖中文餐厅过程(ddCRP)提供了一种灵活的先验分布用于聚类观测,通过成对距离融入协变量信息,并能容纳丰富的聚类结构。当聚类参数与似然函数共轭时,贝叶斯推断是直接的。然而在非共轭情况下,由于聚类分配变化导致的跨维参数空间使推断变得更具挑战性。本文开发了一种可逆跳马尔可夫链蒙特卡洛(RJMCMC)框架来解决这一挑战,针对观察分配更新时聚类参数向量的维度变化特性。我们引入并比较了几种提议策略,包括基于先验、独立性和数据驱动的矩匹配提议,以针对高后验密度区域。对于固定维数的移动,我们提出了一种后验重采样策略,以提高接受率同时保持计算效率。通过模拟研究和Old Faithful喷发持续时间的应用,我们证明了矩匹配提议提供了一种原理上可行的数据驱动替代方案,替代基于先验的提议。所得到的方法提供了一种通用的RJMCMC框架,用于非共轭ddCRP模型,本文在离散和连续观测模型上进行了演示。

英文摘要

The distance dependent Chinese Restaurant Process (ddCRP) provides a flexible prior distribution for clustering observations, incorporating covariate information through pairwise distances and accommodating a rich variety of cluster structures. When cluster parameters are conjugate to the likelihood, Bayesian inference is straightforward. In the non-conjugate setting, however, inference becomes substantially more challenging due to the trans-dimensional parameter spaces that arise as cluster assignments change. We develop a reversible jump Markov chain Monte Carlo (RJMCMC) framework to address this challenge, targeting the dimension-changing nature of cluster parameter vectors when observation assignments are updated. We introduce and compare several proposal strategies for birth and death moves, including prior-based, independence, and data-driven moment-matching proposals that target regions of high posterior density. For fixed-dimensional moves, we propose a posterior resampling strategy that improves acceptance rates while maintaining computational efficiency. Through a simulation study and an application to Old Faithful eruption durations, we demonstrate moment-matched proposals offer a principled, data-driven alternative to prior-based proposals. The resulting methodology provides a general RJMCMC framework for ddCRP models with non-conjugate likelihoods, demonstrated here on both discrete and continuous observation models.

2605.15844 2026-05-18 physics.flu-dyn

Bounce or coalescence : a physical learning frame

碰撞或合并:一种物理学习框架

J. H. Xu, Z. L. Wang

AI总结 本文提出一种基于物理准则和机器学习分类的界面接触模拟框架,统一描述合并与碰撞过程,通过多体积分数场融合与生成实现界面合并与碰撞,减少拓扑转换和计算需求。

Comments 20pages,13figures

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AI中文摘要

在本研究中,我们开发了一种基于物理准则和机器学习辅助分类的界面接触模拟框架,用于在统一公式中描述合并与碰撞。该框架通过多个体积分数场的融合与生成来实现界面合并与碰撞。当相邻界面预测合并时,多个体积分数场被合并为一个体积分数场;当接近界面预测碰撞时,一个体积分数场被重新生成为多个体积分数场,使界面能够独立继续演化。通过这种处理,与界面接近过程相关的拓扑转换、区域图识别、计算需求增加和随机行为的困难被分离出界面跟踪过程。这些决策被分配给具有强适应性的物理引导机器学习模型。该策略避免了对超薄气膜的直接求解,减少了对经验分子力参数的依赖。滴落-滴落碰撞的模拟显示,所提出的框架能够再现不同冲击条件下合并与碰撞的再现。通过进一步引入排水时间标准,该框架被扩展到液面滴落冲击的模拟。对于这个问题,数值结果与先前的实验观察和当前实验结果一致。此外,该框架在单次模拟中捕捉了碰撞后随后合并的完整序列。这些结果表明,所提出的框架对界面接触问题具有强适应性,并为滴落合并与碰撞提供了统一的建模途径。

英文摘要

In this study, we develop an interface-contact simulation framework based on physical criteria and machine-learning-assisted classification to describe coalescence and bouncing within a unified formulation. The framework realizes interfacial coalescence and bouncing through the fusion and generation of multiple volume-of-fluid fields. When adjacent interfaces are predicted to coalesce, multiple VOF fields are collapsed into a single VoF field. When approaching interfaces are predicted to bounce, a single VOF field is regenerated into multiple VOF fields, allowing the interfaces to continue evolving independently. With this treatment, the difficulties associated with topological transition, regime-map identification, increasing computational demand, and stochastic behavior during interfacial approach are separated from the interface-tracking procedure. These decisions are instead assigned to a physics-guided machine-learning model with strong adaptability. This strategy avoids the direct resolution of an ultrathin gas film and reduces the dependence on empirical molecular-force parameters. Simulations of droplet--droplet collisions show that the proposed framework can reproduce both coalescence and bouncing over different impact conditions. By further introducing a drainage-time criterion, the framework is extended to the simulation of droplet impact on a liquid surface. For this problem, the numerical results agree well with both previous experimental observations and the present experiments. Moreover, the framework captures the complete sequence of bouncing followed by subsequent coalescence within a single simulation, These results demonstrate that the proposed framework has strong adaptability for interfacial contact problems and provides a unified modeling route for droplet coalescence, bouncing.

2605.15842 2026-05-18 physics.soc-ph cs.SI

Reconstructing temporal multi-relational firm networks at scale using large language models. The case of the semiconductor industry

利用大语言模型重建大规模时间多关系企业网络:半导体行业案例

Seyda Köse, Christian Diem, Elma Dervic, Klaus Friesenbichler, Georg Heiler, Jan Hurt, Hernan Picatto, Peter Klimek

AI总结 本文利用大语言模型和开放网络数据重建半导体行业企业网络,识别供应链、合作关系和所有权链接,揭示2022年芯片短缺期间的网络变化及AI供应链瓶颈企业的中心性变化。

Comments 32 pages, 5 figures

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AI中文摘要

半导体行业是现代技术的基础,但其复杂的全球多关系企业网络仍不为人知,给科学家、企业和政策制定者带来挑战。传统分析依赖于专有数据库,这些数据库通常昂贵、不完整且更新缓慢,限制了其捕捉快速演变依赖关系的能力。本文展示了一种结合大语言模型(LLMs)和开放网络数据的新方法,能够大规模重建该网络及其结构动态。我们从1.7亿个半导体企业网页中识别并分类供应链、合作关系和所有权链接,获得超过1300个连接企业的时序网络。我们验证了链接提取质量(精度:0.884;F1分数:0.784),网络与专有数据库的重叠和互补性,以及与总体经济数据的一致性。该网络揭示了2022年芯片短缺期间的临时9%边数下降,AI供应链瓶颈企业如NVIDIA的中心性迅速增加,以及地缘政治动荡期间企业关系的地理再定位。这种可推广的框架克服了透明性障碍,提供了关键、最新的地图,用于评估韧性和在战略相关领域制定政策。

英文摘要

The semiconductor industry is foundational to modern technology, yet its complex global multi-relational firm network remains poorly understood, posing challenges to scientists, firms, and policymakers. Traditional analysis relies on proprietary databases that are often expensive, incomplete, and slowly updated, limiting their ability to capture rapidly evolving dependencies. Here, we demonstrate that a novel, generalizable methodology combining Large Language Models (LLMs) with open web data can reconstruct this network and its structural dynamics at scale. We identify and classify supply-chain, partnership, and ownership links from 170 million semiconductor firm webpages, yielding a temporal network of over 1,300 linked firms. We validate link-extraction quality (Precision: 0.884; F1-score: 0.784), network overlap and complementarity with a proprietary database, and consistency with aggregate economic data. Our network reveals a temporary 9% decline in edges during the 2022 chip shortage, rapid increases in the centrality of AI supply-chain bottleneck firms such as NVIDIA, and geographic realignment of interfirm relations amid geopolitical turbulence. This generalizable framework overcomes barriers to transparency and provides essential, up-to-date maps for assessing resilience and informing policy across strategically relevant sectors.

2605.15841 2026-05-18 cond-mat.stat-mech hep-lat hep-th

Critical quench dynamics of Wegner's $\mathbb{Z}_2$ gauge model: a geometric perspective

Wegner的Z₂规范模型的临界淬火动力学:几何视角

Ramgopal Agrawal, Leticia F. Cugliandolo, Marco Picco

AI总结 研究Wegner Z₂规范模型在临界淬火动力学中的行为,通过几何视角分析高温度渗透相和零温度基态淬火过程,发现动态指数z_p≈2.6与能量密度相关指数一致,且不受初始淬火条件影响。

Comments 29 pages, 12 figures

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AI中文摘要

Wegner的Z₂规范模型是纯晶格规范理论的最早表述,预测了束缚-解束缚相变的拓扑性质。在三维空间(D=3)中,该模型的平衡临界行为通过几何定义的对象,即环状激发和Fortuin-Kasteleyn(FK)簇来理解。本工作从几何视角研究该模型的临界淬火动力学,追踪从高温度渗透相和零温度基态的淬火过程。利用时间依赖的有限尺寸标度分析,发现临界非平衡松弛的渗透序参量由动态指数z_p≈2.6主导,与能量密度相关的指数z_c一致。重要的是,z_p的值对初始淬火条件和几何对象的选择具有鲁棒性。此外,我们详细描述了不同几何对象在从渗透相演化过程中的动力学特性。值得注意的是,尽管没有局部序参量,淬火动力学仍遵循由增长长度尺度ξ_p(t)~t^{1/z_p}描述的动态标度行为。

英文摘要

Wegner's $\mathbb{Z}_2$ gauge model is the earliest formulation of pure lattice gauge theory and predicts the topological nature of the confinement-deconfinement transition. In three dimensions ($D=3$), the equilibrium critical behavior of the model is understood in terms of geometrically defined objects, namely loop excitations and Fortuin-Kasteleyn (FK) clusters. This work investigates the critical quench dynamics of this model from a geometric perspective, following quenches from both a high-temperature percolation phase and the zero-temperature ground state. Using time-dependent finite-size scaling analysis, we find that the critical non-equilibrium relaxation of the percolation order parameter is governed by a dynamical exponent $z_{\rm p} \simeq 2.6$, consistent with that associated with the energy density, $z_{\rm c}$. Importantly, the value of $z_{\rm p}$ is robust with respect to the initial quench condition and the choice of geometrical objects. Furthermore, we provide a detailed characterization of the kinetics of different geometrical objects during the evolution from the percolation phase. Notably, we observe that the quench dynamics obeys dynamic scaling in terms of a growing lengthscale, $ξ_{\rm p}(t) \sim t^{1/z_{\rm p}}$, despite the absence of a local order parameter.

2605.15840 2026-05-18 physics.atom-ph physics.atm-clus physics.chem-ph

Fluorescence and Relaxation Dynamics of Cesium in Argon Matrices: Multiple Trapping Sites and Host-Guest Interactions

铯在氩基质中的荧光与弛豫动力学:多重陷阱位点与主客体相互作用

S. Lahs, H. Dinesan, S. Mahapatra, W. Chin, C. Crepin, L. Dontot, J. Douady, B. Gervais, D. Comparat

AI总结 研究铯原子在低温氩基质中的荧光与弛豫动力学,结合光谱测量与DIM模拟,揭示复杂发射光谱、大斯托克斯位移和慢弛豫效应,表明强主客体相互作用和显著晶格重排。

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AI中文摘要

我们利用光谱测量结合双原子-分子(DIM)模拟,研究了嵌入低温氩基质中的铯原子的荧光和弛豫动力学。数据揭示了复杂的发射光谱、大的斯托克斯位移和缓慢的弛豫效应,表明强主客体相互作用和显著的晶格重排。尽管光谱叠加在宽背景下,可能由于低对称性、缺陷相关或晶界陷阱位点,主要光谱结构与两个主导陷阱环境一致,产生两个三线态吸收特征,具有不同的双线态和单线态组分的荧光行为。极化测量进一步表明,这些位点可能对称性不同,尽管难以确定独特的结构分配。

英文摘要

We investigate the fluorescence and relaxation dynamics of Cs atoms embedded in a cryogenic argon matrix using spectroscopy measurements combined with diatomic-in-molecule (DIM) simulations. The data reveal complex emission spectra, large Stokes shifts, and slow relaxation effects, indicating strong host-guest interactions and substantial lattice reorganization. Although the spectra are superimposed on a broad background, possibly due to low-symmetry, defect-related, or grain-boundary trapping sites, the main spectral structure is consistent with two dominant trapping environments that give rise to two triplet absorption features with distinct fluorescence behavior of the doublet and singlet components. Polarization measurements further suggest that these sites may differ in symmetry, although a unique structural assignment remains difficult

2605.15839 2026-05-18 q-bio.CB math.DS physics.bio-ph q-bio.PE q-bio.QM

How nature discovers rare Turing islands: exploration by common limit cycles

如何自然发现稀有图灵岛屿:通过常见极限环的探索

Seyoon Kim, Antonio Matas-Gil, Robert G. Endres

AI总结 研究探讨了通过常见生化极限环探索图灵空间的机制,展示如何动态扫描图灵允许区域并生成瞬时空间模式,提升图灵岛屿的检测性和鲁棒性。

Comments This manuscript is the accepted author version and will be typeset and published in PNAS

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AI中文摘要

图灵模式是生物自组织的基石,但其出现通常需要精细调参占据高维空间的狭窄区域。本文提出,常见的生化极限环,如来自基因反馈环的极限环,可作为自然探索者。通过将反应扩散系统与调节其参数的轨道耦合,展示系统可动态扫描图灵允许区域并生成瞬时空间模式。利用傅里叶空间的熵度量量化模式形成,并展示极限环如何增强图灵岛屿的检测性和鲁棒性。进一步探讨与位置梯度耦合如何提高可重复性,提出从振荡动力学到稳定发育程序的路线。结果强调了自然如何通过简单时间模式 bootstrap 复杂空间结构的有力机制。

英文摘要

Turing patterns are a cornerstone of biological self-organization, yet their emergence typically requires finely tuned parameters occupying narrow regions of high-dimensional space. This poses a fundamental challenge: how can evolving biological systems reliably find and exploit such rare conditions? In this work, we propose that common biochemical limit cycles, such as those arising from genetic feedback loops, can act as natural explorers of Turing space. By coupling a reaction-diffusion system to an orbit that modulates some of its parameters, we show that the system can dynamically sweep through Turing-permissive regimes and generate transient spatial patterns. We use an entropy-based measure in Fourier space to quantify pattern formation and demonstrate how cycles enhance the detectability and robustness of Turing islands. We further explore how coupling to positional gradients increases reproducibility, suggesting a route from oscillatory dynamics to stable developmental programs. Our results highlight a powerful mechanism by which nature might bootstrap complex spatial structure from simple temporal motifs.

2605.15838 2026-05-18 math.OC

Finding directional stationary points of DC programs

寻找DC程序的方向 stationary 点

Hoai An Le Thi, Van Ngai Huynh, Tao Pham Dinh

AI总结 本文提出了一种统一方法,用于识别非光滑DC程序的方向 stationary 点,扩展了经典DCA和近期方法,并在满足洛扎斯iewicz不等式条件下证明了算法的强收敛性。

Comments 24 pages

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AI中文摘要

我们解决了计算非光滑、非凸优化问题 stationary 点的问题。尽管在光滑情况下此主题已被广泛研究,但在非光滑情况下算法和理论结果较少。在差分凸函数(DC)编程中,著名的DC算法(DCA)是计算临界点的标准方法,其定义依赖于所选的DC分解。更近期的一些工作则聚焦于计算特定的非光滑DC程序的方向 stationary 点——一种不依赖任何特定DC分解的更强概念,其中第二个DC组件是有限多个光滑凸函数的点wise最大值。在本文中,我们提出了一种新的统一方法,用于识别非光滑DC程序的方向 stationary 点,其中两个DC组件可能都是非光滑的。我们的框架扩展了经典的DCA和上述近期方法。它适用于第二个DC组件是连续族光滑凸函数的点wise最大值的情况,并更一般地适用于整个空间上的任意连续凸函数。我们还建立了强收敛性结果。具体而言,当第二个DC组件是有限多个$C^{1,1}$-光滑凸函数的点wise最大值时,我们在满足洛扎斯iewicz不等式条件下证明了整个序列由我们的算法生成的收敛性。这扩展了之前要求全局$C^{1,1}$-光滑性的结果。最后,我们引入了我们方法的随机(随机)变体,并证明了其几乎必然收敛,从而将我们的确定性结果扩展到随机设置中。

英文摘要

We address the problem of computing stationary points for non-smooth, non-convex optimization problems. While this topic is well studied in the smooth setting, fewer algorithmic and theoretical results exist for the non-smooth case. Within Difference-of-Convex functions (DC) programming, the well-known DC Algorithm (DCA) is a standard method for computing critical points, whose definition depends on the chosen DC decomposition. More recently, some works have focused on computing directional stationary points - a stronger notion that does not depend on any particular DC decomposition - for specific non-smooth DC programs, where the second DC component is the pointwise maximum of finitely many smooth convex functions. In this contribution, we propose a new and unified approach for identifying directional stationary points of non-smooth DC programs, where both DC components may be non-smooth. Our framework generalizes both the classical DCA and the above recent approaches. It applies when the second DC component is the pointwise maximum of a continuous family of smooth convex functions, and more generally, to any continuous convex function on the whole space. We also establish strong convergence results. Specifically, when the second DC component is the pointwise maximum of finitely many $C^{1,1}$ - smooth convex functions, we prove under the Łojasiewicz inequality that the entire sequence generated by our algorithm converges. This extends previous results requiring global $C^{1,1}$ - smoothness. Finally, we introduce a randomized (stochastic) variant of our method and prove its almost sure convergence, thereby extending our deterministic results to the randomized setting.

2605.15837 2026-05-18 math.AP

Large-data $L^2$-decay for attractive-dissipative nonlinear Schrödinger equations without the strong dissipative condition

大数据$L^2$衰减对于吸引-耗散非线性薛定谔方程的研究

Naoyasu Kita, Hayato Miyazaki, Takuya Sato

AI总结 本文基于吸引-耗散非线性薛定谔方程,通过引入增强能量,克服了标准能量在Reλ<0时的符号不定性,从而得到大初始数据的$L^2$衰减估计,无需强耗散条件。

Comments 9 pages

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AI中文摘要

我们证明了具有吸引-耗散幂非线性项的非线性耗散薛定谔方程的大数据$L^2$衰减估计。主要困难在于当Reλ<0时标准能量缺乏符号确定性,这阻止了通常的能量论证直接得到均匀梯度界。我们引入了通过添加合适的倍数的递减$L^2$-范数到标准能量所得到的增强能量。这产生了一个额外的耗散项,并在不需要前人工作中迭代论证的情况下,直接得到均匀的时间$H^1$界。因此,对于任意初始数据在加权能量空间$Σ=H^1∩\mathcal{F}H^1$中,我们得到在精确衰减范围$1<p\le 1+2/d$内已知的衰减率,这消除了吸引-耗散情况下的剩余限制$p\le 1+4/(3d)$。

英文摘要

We prove a large-data $L^2$-decay estimate for nonlinear dissipative Schrödinger equations with attractive-dissipative power nonlinearity. The main difficulty is the lack of sign definiteness of the standard energy when $\Reλ<0$, which prevents the usual energy argument from directly yielding a uniform gradient bound. We introduce an augmented energy, obtained by adding a suitable multiple of the decreasing $L^2$-norm to the standard energy. This produces an additional dissipative term and gives a direct uniform-in-time $H^1$ bound without the iteration argument used in previous works. Consequently, for arbitrary initial data in the weighted energy space $Σ= H^1 \cap \mathcal{F}H^1$, we obtain the decay rate previously known under the strong dissipative condition throughout the sharp decay range $1<p\le 1+2/d$. This removes the remaining restriction $p\le 1+4/(3d)$ in the attractive-dissipative case.

2605.15834 2026-05-18 cond-mat.supr-con

Effective increase of a superconducting critical temperature in a high-entropy electron mixture

高熵电子混合物中超导临界温度的有效提升

Viktoriia Kornich

AI总结 通过金属陷阱去除准粒子激发,使混合熵影响超导相动力学,从而有效提升超导临界温度。

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AI中文摘要

我们理论证明,在导带和价带电子组成的高熵混合物中,可通过金属陷阱去除准粒子激发,使混合熵影响超导相动力学,从而使混合熵影响超导的Ginzburg-Landau功能,有效降低第一展开系数或等价地提高临界温度。

英文摘要

We show theoretically that a superconducting critical temperature can be effectively increased in a high-entropy mixture of electrons belonging to conduction and valence bands. In order to employ the entropy of mixing into the superconducting phase dynamics, we suggest to use a metallic trap that removes quasiparticle excitations from the superconductor. This makes the concentration of Cooper pairs a dynamic variable of the entropy of mixing, and thus affects the Ginzburg-Landau functional of the superconductor effectively reducing the first expansion coefficient or, in other words, increasing the critical temperature.

2605.15833 2026-05-18 cs.DS cs.DM math.CO

Exploration of $k$-edge-deficient temporal graphs in linear time

$k$-边缺陷时间图的线性时间探索研究

Ivan Lahtin, Viktor Zamaraev

AI总结 本文研究了时间图的探索问题,提出了一种线性时间内探索始终连通的$k$-边缺陷时间图的方法,解决了静态图线性时间探索的复杂性问题。

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AI中文摘要

我们研究了探索问题,其中代理必须在时间图中访问所有顶点,同时每时间步只能遍历一条可用边。与静态图不同,时间约束可能显著增加探索时间,即使每个快照都连通。为了更好地理解这种复杂性来源,我们考虑始终连通的$k$-边缺陷时间图,每个快照都连通且与固定基础$n$-顶点图最多差$k$条边。尽管这些图在结构上接近静态图,但它们仍可能表现出非平凡的时间行为。先前工作表明这些图可以在$O(kn \log n)$时间步内探索,并建立了$Ω(n \log k)$的下界,留下是否可能在$n$时间内线性时间探索的问题。我们通过证明任何始终连通的$k$-边缺陷时间图都允许长度为$O(nk \log k)$的探索计划来解决这个问题。此外,给定这样的时间图,相应的探索计划可以在多项式时间内计算。获得的界限是顶点数的线性函数,至多取决于$k$,去除了对$n$的额外对数依赖,并且几乎是最优的。特别是,对于常数$k$,我们的结果给出了$Θ(n)$的探索时间,表明在近静态的范围内,时间探索本质上保留了静态图遍历的线性时间特性。

英文摘要

We study the Temporal Exploration problem, where an agent must visit all vertices of a temporal graph while traversing at most one available edge per time step. Unlike static graphs, which can be explored in linear time, temporal constraints can substantially increase exploration time even when every snapshot of the graph is connected. To better understand the source of this complexity, we focus on a near-static setting and consider always-connected $k$-edge-deficient temporal graphs, in which each snapshot is connected and differs from a fixed underlying $n$-vertex graph by at most $k$ edges. Although such graphs are structurally close to static graphs, they can still exhibit non-trivial temporal behaviour. Prior work showed that these graphs can be explored in $O(kn \log n)$ time steps and established a lower bound of $Ω(n \log k)$, leaving open whether linear-time exploration in $n$ is possible. We resolve this question by showing that any always-connected $k$-edge-deficient temporal graph admits an exploration schedule of length $O(nk \log k)$. Moreover, given such a temporal graph, the corresponding exploration schedule can be computed in polynomial time. The obtained bound is linear in the number of vertices up to a factor depending only on $k$, removes the extraneous logarithmic dependence on $n$, and is nearly optimal. In particular, for constant $k$, our result yields an order-optimal $Θ(n)$ exploration time, showing that temporal exploration in this near-static regime essentially retains the linear-time character of static graph traversal.

2605.15830 2026-05-18 math.DS

A non-logarithmic approach to the rate of convergence of the deterministic chaos game

非对数方法用于确定性混沌游戏收敛速率的研究

Krzysztof Caban, Filip Strobin

AI总结 本文从新角度探讨混沌游戏算法收敛到迭代函数系统的吸引子的速率,证明了典型驱动器的恢复速率与函数ψ的极限行为一致,并扩展了Leśniak等人2024年的主要定理。

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AI中文摘要

本文旨在为研究混沌游戏算法收敛到迭代函数系统吸引子的速率提供新的视角。我们证明,对于任何函数ψ,当ε趋近于0时,ψ(ε)趋近于无穷大,典型驱动器(按巴依尔类别意义)的恢复速率与ψ相当。这一结果扩展了Leśniak等人(Rev. Real Acad. Cienc. Exactas Fis. Nat. Ser. A-Mat. 118, 157, 2024)的主要定理。此外,得益于视角的转变,我们能够证明,典型驱动器的恢复速率可以任意缓慢。

英文摘要

The aim of this paper is to provide a different perspective in the study of the rate of convergence of the chaos game algorithm to the attractor of an iterated function system. We prove that for any function $ψ$ with $\lim\limits_{\ve\to 0}ψ(\ve)=\infty$, a typical (in the sense of the Baire category) driver yields a rate of recovery comparable to $ψ$. This result extends the main theorem from Leśniak et al. (Rev. Real Acad. Cienc. Exactas Fis. Nat. Ser. A-Mat. 118, 157, 2024). Moreover, thanks to the change of perspective, we are able to prove that a typical driver gives arbitrarily slow rate of recovery.

2605.15827 2026-05-18 cs.PL

Caesar: A Deductive Verifier for Probabilistic Programs

Caesar:概率程序的演绎验证器

Philipp Schröer, Kevin Batz, Umut Yiğit Dural, Darion Haase, Benjamin Lucien Kaminski, Joost-Pieter Katoen, Christoph Matheja

AI总结 Caesar通过HeyVL语言实现概率程序的验证,支持自定义证明规则和模型检查后端,具备五年研发成果与改进功能。

Comments To be published at CAV2026

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AI中文摘要

Caesar是一种概率程序的演绎验证器。其核心是HeyVL,一种基于实值逻辑HeyLo的量化中间验证语言。HeyVL允许用户以编程语言风格表达概率程序、规格说明和证明规则,从而轻松集成新证明规则。Caesar将HeyVL程序转换为验证条件,然后通过Z3 SMT求解器检查。它还包括基于概率模型检查的后端,用于HeyVL的子集。我们报告了Caesar五年开发的成果,突出其主要功能和架构。特别地,我们描述了最近的改进,如额外的证明规则、模型检查后端和更好的诊断信息。

英文摘要

Caesar is a deductive verifier for probabilistic programs. At its core lies HeyVL, a quantitative intermediate verification language based on the real-valued logic HeyLo. HeyVL allows users to express a probabilistic program, its specifications, and proof rules in a programming-language style, so that new proof rules can be easily integrated into the verifier. Caesar translates HeyVL programs into verification conditions, which are then checked using the Z3 SMT solver. It also includes a backend based on probabilistic model checking for a subset of HeyVL. We report on the results of five years of development of Caesar, highlighting its main features and architecture. In particular, we describe recent improvements such as additional proof rules, a model-checking backend, and better diagnostics.

2605.15826 2026-05-18 nlin.PS hep-ph

Front propagation in non-homogeneous $ϕ^4$ model

非均匀ϕ⁴模型中的前沿传播

Jacek Gatlik, Tomasz Dobrowolski, Dominika Lasa, Panayotis G. Kevrekidis

AI总结 研究非均匀介质中ϕ⁴模型前沿传播,通过kink解和half-kink解分析,发现half-kink解的不一致描述需修正模型以符合场论结果。

Comments 26 pages, 14 figures

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AI中文摘要

我们研究了非均匀介质中$ϕ^4$模型前沿传播。非均匀性被建模为一个分离不同耗散区域的界面,或为一个具有修改耗散的有限层。传播前沿以两种方式描述:作为无限域中的kink解,或作为有限系统中的half-kink解。half-kink代表不稳定状态$ϕ=0$向真实真空的衰变。我们显示,虽然基于kink的有效描述能提供准确结果,但将类似方法应用于half-kink会导致与场模型预测显著偏离。我们随后证明了一致描述确实存在,并提出一个修正的有效模型,能够在较宽的参数范围内重现场论结果。

英文摘要

We investigate the propagation of fronts in an inhomogeneous medium within the framework of the $ϕ^4$ model. The inhomogeneity is modeled either as an interface separating regions with different dissipation or as a finite layer with modified dissipation. The propagating front is described in two ways: as a kink solution in an effectively unbounded domain, and as a half-kink in a finite system. The half-kink represents the decay of the unstable state $ϕ=0$ toward the true vacuum. We show that while the effective description based on the kink provides accurate results, applying a similar approach to the half-kink leads to significant deviations from the predictions of the field model. We then demonstrate that a consistent description does exist and propose a modified effective model which reproduces the field-theory results over a relatively broad range of parameters.

2605.15823 2026-05-18 stat.AP cs.IT math.IT

Active Redundancy Allocation Strategy at Component and System Level

组件和系统层面的主动冗余分配策略

Bidhan Modok, Shovan Chowdhury, Amarjit Kundu

AI总结 本文研究了在可能依赖和相同组件构成的相干系统中,非匹配主动冗余(备用)的分配策略,以提高系统可靠性。通过皮尔逊函数建模组件依赖性,并推导出两种异质主动冗余在组件或系统层面的最优分配条件。

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AI中文摘要

可靠性工程和优化领域的研究人员和实践者经常使用主动冗余技术来增强系统性能。本文研究了在由可能依赖和相同组件构成的相干系统中,非匹配主动冗余(备用)的分配策略,以实现更好的系统可靠性。组件之间的依赖性通过皮尔逊函数建模。推导出两种异质主动冗余在组件或系统层面的最优分配条件。此外,结果适用于组件寿命遵循一般参数族分布的情况。结果保证了在组件层面(系统层面)主动冗余之间的似然比(反危险率)顺序。在此过程中还建立了某些老化性质。提供了一些示例以展示理论结果。

英文摘要

Researchers and practitioners in the field of reliability engineering and optimization frequently use active redundancy techniques to intensify the performance of systems. In this article, we study allocation strategies of non-matching active redundancies (spares) in coherent systems consisting of possibly dependent and identical components for achieving better system reliability. The dependence of the components is modeled through copulas using the distortion function. Sufficient conditions are derived to establish optimal allocation strategies for two heterogeneous active redundancies at the component or system levels. Moreover, the results are true for the component lifetimes following a general family of parametric distributions. The results guarantee the likelihood ratio (reversed hazard) ordering between the coherent systems at the component level (system level) active redundancies. Some aging properties are also established in this endeavor. Several examples are provided to demonstrate the theoretical results.

2605.15820 2026-05-18 hep-ph

A Near-Cutoff Waveguide Haloscope for sub-meV Dark Matter

接近截止的波导示波器用于亚毫电子伏特暗物质

Chuan-Yang Xing, Bin Zhu

AI总结 本文提出一种接近截止的平行板波导示波器,用于探测亚毫电子伏特暗物质,通过慢波响应和相干积累实现场增强,无需闭合驻波共振,展示了高灵敏度和可扩展性的探测方法。

Comments 11 pages, 3 figures

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AI中文摘要

我们提出了一种接近截止的平行板波导示波器,用于探测亚毫电子伏特暗物质。该概念保留了抛物面天线的大面积开放性,通过慢波响应和相干积累提供腔体样场增强,而无需依赖闭合驻波共振。对于铜波导,预计的暗光子灵敏度达到ε≈2.1×10^-15,接近m_A'≈0.1 meV。借助外部磁场,相同的转换器可以接近QCD轴子参数空间。波导示波器强调了一种灵敏且可扩展的路线,用于未来亚毫电子伏特玻色暗物质搜索。

英文摘要

We propose a near-cutoff parallel-plate waveguide haloscope for sub-meV dark matter. The concept retains the large-area openness of a dish antenna while providing cavity-like field enhancement through slow-wave response and coherent accumulation, without relying on a closed standing-wave resonance. For a copper waveguide, the projected dark photon sensitivity reaches $\varepsilon\simeq2.1\times10^{-15}$ near $m_{A'}\simeq 0.1\,\mathrm{meV}$. With an external magnetic field, the same transducer can approach QCD axion parameter space. The waveguide haloscope highlights a sensitive and scalable route toward future sub-meV bosonic dark matter searches.

2605.15818 2026-05-18 math.DG

On the triviality of the generalized tangent bundle

关于广义切包的平凡性

Fernando Etayo, Pablo Gómez-Nicolás, Rafael Santamaría

AI总结 研究了流形切包与广义切包的平凡性关系,证明平行可积流形的广义切包平凡,并通过莫比乌斯带、球面和射影空间例证逆向不成立,最后将广义切包平凡性与广义几何结构关联。

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AI中文摘要

我们研究了流形切包$TM$与广义切包$\mathbb{T}M = TM\oplus T^*M$的平凡性关系。我们证明了平行可积流形的广义切包是平凡的。我们还通过研究莫比乌斯带、球面和射影空间的情况,证明逆向推论不成立。最后,我们将广义切包的平凡性与广义几何结构联系起来。

英文摘要

We study the relations between the triviality of the tangent bundle $TM$ and the generalized tangent bundle $\mathbb{T}M = TM\oplus T^*M$ of a manifold. We show that the generalized tangent bundle of a paralellizable manifold is trivial. We also prove that the converse implication does not hold, by studying the cases of the Möbius strip, spheres and projective spaces. Finally, we relate the triviality of the generalized tangent bundle to generalized geometric structures.

2605.15817 2026-05-18 cs.HC

Which Moments Matter? Heuristics of Remembered Travel Experience in Public Transport

哪些时刻重要?公共交通旅行中记忆体验的启发式方法

Esther Bosch, Klas Ihme, Stefan Bohmann

AI总结 研究探讨了公共交通旅行中哪些时间聚合启发式方法最能预测旅行满意度,发现最小末端启发式方法效果最佳,表明负面极端和行程结束对记忆评价有独立影响。

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AI中文摘要

理解旅行者如何形成公共交通旅程的整体评价对于提高旅行满意度和鼓励可持续出行方式至关重要。尽管旅行满意度被认为会影响态度和未来行为,但在交通研究中,如何将逐 moment 的体验汇总到回顾性评价中的认知规则仍不明确。本文基于经验性和记忆性效用的心理学理论,研究了哪些时间聚合启发式方法最能预测旅行后满意度。通过基于智能手机的经验采样方法,我们收集了2576次真实世界公共交通行程的高频行程体验评分和行程后评价,涵盖三个德国城市。在行程中每五分钟使用多项目量表评估旅行体验,允许直接比较竞争性聚合规则,包括平均体验、高峰-结束、最小-结束、最后时刻和行程持续时间。估计多级回归模型以评估每种启发式的解释力。结果显示,回顾性旅行满意度最佳由最小末端启发式方法预测,该方法结合了旅程中最负面的时刻和最后的体验。基于平均体验、高峰-结束规则、仅最后时刻或行程持续时间的模型表现明显较差。这种模式表明,负面极端和行程的最后阶段独立影响记忆评价,而非整体满意度反映平均的即时体验。结果对理论和实践有重要影响,表明在关键负面时刻和行程结束处实施针对性干预可能显著提高记忆满意度,最终支持向可持续出行方式的转变。

英文摘要

Understanding how travelers form overall evaluations of public transport journeys is critical for improving travel satisfaction and encouraging sustainable mode choice. While travel satisfaction is discussed to influence attitudes and future behavior, the cognitive rules by which moment-to-moment experiences are aggregated into retrospective evaluations remain poorly understood in transport research. Drawing on psychological theories of experienced and remembered utility, this study investigates which temporal aggregation heuristics best predict post-trip travel satisfaction. Using a smartphone-based experience sampling approach, we collected high-frequency on-trip experience ratings and post-trip evaluations for 2576 real-world public transport trips across three German cities. Travel experience was assessed every five minutes during trips using a multi-item scale, allowing direct comparison of competing aggregation rules, including mean experience, peak-end, minimum-end, final moment, and trip duration. Multilevel regression models were estimated to evaluate the explanatory power of each heuristic. Results show that retrospective travel satisfaction is best predicted by a Minimum-End heuristic, combining the most negative moment of the journey and the final experience. Models based on mean experience, peak-end rules, final moment alone, or trip duration performed substantially worse. This pattern indicates that both negative extremes and the final phase of a journey independently contribute to remembered evaluations, rather than overall satisfaction reflecting an average of momentary experiences. The results have important implications for theory and practice, suggesting that targeted interventions at critical negative moments and at trip endings may yield substantial improvements in remembered satisfaction and, ultimately, support shifts toward sustainable mobility.

2605.15814 2026-05-18 math.ST stat.TH

Goodness-of-Fit Testing for Point Processes in Large Populations

大规模群体中点过程的拟合优度检验

Sami Umut Can, Estate V. Khmaladze, Roger J. A. Laeven

AI总结 本文提出一种新方法,通过构造单位变换使自然参数检验过程弱收敛于标准目标过程,实现大规模群体中点过程参数族的渐近分布自由拟合优度检验。

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AI中文摘要

假设我们有一个观察到的路径,该路径来自一个大规模群体中计数事件发生的点过程。基于观察到的路径,我们希望检验原假设,即点过程的条件强度属于特定的参数族。我们提出了一种新的进行此类拟合优度检验的方法。想法是构造一个自然参数检验过程的单位变换,使其弱收敛于一个"标准"目标过程,该过程与原假设下假设的特定参数形式无关。这种变换因此为参数点过程的渐近分布自由拟合优度检验铺平了道路。我们通过Aalen型生存过程的蒙特卡洛模拟(无和有删失)、混合治愈模型以及软件可靠性模型,展示了我们方法在有限样本性能上的良好表现,并通过观察到的人类寿命以及真实软件故障示例,展示了其适用性。

英文摘要

Suppose we have an observed path from a point process counting event occurrences in a large population. Based on the observed path, we would like to test the null hypothesis that the conditional intensity of the point process belongs to a particular parametric family. We propose a novel approach to conducting such goodness-of-fit tests. The idea is to construct a unitary transformation of a natural parametric testing process such that it converges weakly to a ``standard'' target process, independent of the particular parametric form assumed under the null hypothesis. This transformation therefore paves the way for asymptotically distribution-free goodness-of-fit testing of parametric point processes. We demonstrate the good finite-sample performance of our approach through Monte Carlo simulations of Aalen-type survival processes, without and with censoring, mixture cure models, and software reliability models, and we illustrate its applicability with observed human lifetimes as well as real software failures.

2605.15813 2026-05-18 quant-ph

Bias Analysis and Regularization of Sequential Minimal Optimization in Variational Quantum Eigensolvers

变分量子本征求解器中序列最小优化的偏差分析与正则化

Samuele Pedrielli, Frederik Stalschus, Stefan Kühn, Karl Jansen, Kim A. Nicoli, Shinichi Nakajima

AI总结 本文分析了变分量子本征求解器中序列最小优化的偏差来源,提出了一种简单正则化方法,在保持能量估计无偏的同时提升优化性能。

Comments 13 pages, 7 figures

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AI中文摘要

Nakanishi Fujii Todo (NFT)算法,也称为Rotosolve,通过利用能量对单个电路参数的三角依赖性,实现了变分量子本征求解器中的序列最小优化(SMO-VQE)。这使得仅通过少量,通常为两个,的能量评估即可进行一维分析最小化,但会引入估计能量的偏差。尽管每几十次迭代后进行额外测量可缓解偏差累积,但我们发现此类修正通常会降低优化性能。在本文中,我们分析了SMO-VQE过程中偏差的起源和累积。具体而言,我们展示了偏差可以无需额外测量即可准确估计。此外,我们发现偏差修正会破坏具有小曲率方向的优化,而原始有偏估计器隐式地起到正则化作用。基于这些见解,我们提出了一种简单的正则化方法,实现误差累积的同时保持无偏能量估计。所得到的算法在不同系统大小、电路深度、目标哈密顿量和测量次数下均能一致提升性能,且超参数调整最小。

英文摘要

The Nakanishi Fujii Todo (NFT) algorithm, also known as Rotosolve, implements Sequential Minimal Optimization for Variational Quantum Eigensolvers (SMO-VQE) by exploiting the trigonometric dependence of the energy on individual circuit parameters. This enables analytical one-dimensional minimization using only a few , typically two, energy evaluations, but introduces bias in the estimated energy. Although performing additional measurements every few tens of iterations can mitigate bias accumulation, we find that such corrections often degrade optimization performance. In this paper, we analyze the origin and accumulation of bias during the SMO-VQE process. Specifically, we show that the bias can be accurately estimated without additional measurements. Furthermore, we find that bias correction destabilizes optimization along directions with small curvature, whereas the original biased estimator implicitly acts as a regularizer. Based on these insights, we propose a simple regularization method that implements error accumulation while maintaining unbiased energy estimation. The resulting algorithm consistently improves performance across different system sizes, circuit depths, target Hamiltonians, and measurement shots, with minimal hyperparameter tuning.

2605.15810 2026-05-18 math.LO

Axiomatizing logics of finite Gödel-Kripke models

对有限戈德尔-克里普克模型逻辑的公理化

Amanda Vidal, Ricardo O. Rodriguez

AI总结 研究模态戈德尔逻辑对有限戈德尔-克里普克模型的完备性,发现原有逻辑不满足,并提出新的公理化方法以实现完备性。

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AI中文摘要

我们研究了模态戈德尔逻辑相对于有限戈德尔-克里普克模型的完备性,以及相关方面。众所周知,[4, 11]中研究的逻辑在有限戈德尔-克里普克模型上不完备。我们证明自然候选的公理扩展无法恢复完备性,从而解决了一个提出15年的开放问题。然后我们提供了新的公理化方法,这些方法对有限模型完备,并刻画了基本逻辑中成立的中间见证条件。

英文摘要

We investigate completeness for modal Gödel logics with respect to finite Gödel-Kripke models, along with related aspects. It is well known that the logics studied in [4, 11] fail to be complete with respect to finite Gödel-Kripke models. We show that the natural candidate axiomatic extensions do not restore completeness, thereby resolving a 15 year open problem posed in the aforementioned works. We then provide new axiomatizations that are complete for finite models and characterize intermediate witnessing conditions that hold for the basic logics.