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2605.19898 2026-05-21 math.AG math.NT

Manin's conjecture for semi-integral curves and $\mathbb A^1$-connectedness

Manin猜想的半整曲线和$\mathbb A^1$-连通性

Qile Chen, Brian Lehmann, Sho Tanimoto

AI总结 本文研究了积分点的Log Manin猜想及其与$\mathbb A^1$-连通性的联系,证明了Campana有理曲线和分裂托里除数上的Log Manin猜想,并结合Cox环描述和Batyrev的启发式计数方法给出几何解释。

Comments 47 pages

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AI中文摘要

我们探讨了积分点的Log Manin猜想及其与$\mathbb A^1$-连通性的联系。我们证明了Campana有理曲线和$\mathbb A^1$-曲线在分裂托里除数上的Log Manin猜想。我们的论证结合了有理曲线模空间的Cox环描述与Batyrev的启发式计数方法。由于我们的证明具有几何性质,因此为Chow--Loughran--Takloo-Bighash--Tanimoto提出的Campana点的神秘主常数提供了几何解释。

英文摘要

We explore log Manin's conjecture for integral points and its connections to $\mathbb A^1$-connectedness. We prove log Manin's conjecture for Campana rational curves and for $\mathbb A^1$-curves on split toric varieties. Our arguments combine the Cox ring description of the moduli space of rational curves with Batyrev's heuristic-type counting arguments. As our proofs are geometric in nature, they give a geometric explanation of the mysterious leading constant for Campana points proposed by Chow--Loughran--Takloo-Bighash--Tanimoto.

2605.19787 2026-05-21 eess.SP

Practical RIS Gain without the Pain via Randomization and Opportunistic Scheduling in 5G NR Wireless Systems: Theory and Experiments

在5G NR无线系统中通过随机化和机会性调度实现实用的RIS增益:理论与实验

Nekkanti Guna Sai Kiran, L. Yashvanth, Raju Malleboina, Venkatareddy Akumalla, Debdeep Sarkar, Chandra R. Murthy

AI总结 本文通过理论分析和实验验证,在5G NR系统中利用随机化和机会性调度实现RIS的增益,提出了一种低复杂度的RIS相位配置方法,无需额外开销即可达到与优化RIS设计相当的性能。

Comments Submitted to IEEE Transactions on Communications

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AI中文摘要

在本文中,我们理论分析并实验验证了将自行构建的可重构智能表面(RIS)与使用OpenAirInterface(OAI)软件栈实现的5G新无线电(NR)系统集成所能够实现的性能增益。与传统依赖显式信道状态信息(CSI)估计后进行RIS相位配置优化的RIS辅助系统不同,我们采用了一种低复杂度的方法,其中RIS的相位状态在预定义的配置之间随机切换。由此产生的信道波动被5G NR内在的正比公平(PF)调度机制机会性利用。我们开发了一个理论框架,用于表征RIS切换动态与PF调度之间的相互作用。基于此框架及相关分析,我们为选择RIS切换时间$T_s$和PF吞吐量平均窗口$T_c$提供了设计指南,以最大化系统吞吐量。在5G NR测试床上的实验评估显示,关键性能指标,包括参考信号接收功率(RSRP)、块错误率(BLER)、调制和编码方案(MCS)指数和吞吐量均有所改进。我们的关键发现是,随机配置的RIS操作配合适当选择的系统参数可以实现与优化RIS设计相当的性能,与传统5G NR系统相比无额外开销。更重要的是,它不需要RIS与5G NR系统之间的协调。

英文摘要

In this paper, we theoretically analyze and experimentally demonstrate the performance gains achievable by integrating an in-house built reconfigurable intelligent surface (RIS) with a 5G new radio (NR) system implemented using the OpenAirInterface (OAI) software stack. Unlike conventional RIS-assisted systems that rely on explicit channel state information (CSI) estimation followed by RIS phase configuration optimization, we adopt a low-complexity approach in which the RIS phase states are randomly switched among predefined configurations. The resulting channel fluctuations are opportunistically exploited by the inherent proportional fair (PF) scheduling mechanism of 5G NR. We develop a theoretical framework that characterizes the interaction between RIS switching dynamics and PF scheduling. Based on this framework and the associated analysis, we provide design guidelines for selecting the RIS switching time $T_s$ and the PF throughput averaging window $T_c$ that maximize the system throughput. Experimental evaluations on the 5G NR testbed demonstrate improvements in key performance metrics, including reference signal received power (RSRP), block error rate (BLER), modulation and coding scheme (MCS) index, and throughput. Our key takeaway is that randomly configured RIS operation with appropriately chosen system parameters can achieve performance comparable to optimized RIS designs, with no additional overhead compared to a conventional 5G NR system. More importantly, it requires no coordination between the RIS and the 5G NR system.

2605.19661 2026-05-21 astro-ph.GA

COSMOS-Web: Star formation along the early Hubble sequence and the evolution of dust over the redshift range 0<z<12

COSMOS-Web:早期哈勃序列中的恒星形成与红移范围0<z<12内尘埃的演化

Stephen Eales, Matthew Smith, Tom Bakx, Jordan D'Silva, Feng-Yuan Frey Liu, Aparna Venkateshwaran

AI总结 通过COSMOS-Web目录对最深的SCUBA-2图像进行堆叠分析,研究了红移范围0<z<12内不同恒星质量及形态类别的星系的平均亚毫米波辐射,发现高红移星系的恒星形成率增加,并揭示了尘埃演化与恒星形成历史的关系。

Comments accepted for publication in MNRAS

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AI中文摘要

我们利用COSMOS-Web目录对最深的SCUBA-2图像进行堆叠分析,以估计红移范围0<z<12内按恒星质量和形态类别划分的星系的平均亚毫米波辐射。对于所有形态类别,从尘埃发射估计的平均恒星形成率随红移增加,达到最 massive星系(~10^11 solar masses)在2 < z < 4.5范围内大于~80个太阳质量每年。在这一红移范围内,这些星系的平均恒星形成率沿着哈勃序列从不规则星系的一端约280个太阳质量每年降至球状星团的一端约80个太阳质量每年,表明哈勃序列出现后不久就已经开始熄灭。球状星团的恒星形成率下降可以用一种“饥饿”熄灭模型(耗尽时间约为10^8.2年)来解释。我们还显示,亚毫米波星系的转变可以解释红移范围1.5 < z < 4内大质量球状星团和球状星团星系数量密度的增长。作为副项目,我们利用堆叠结果展示了银河系中尘埃质量与恒星质量比随红移增加到z~8,并确定了红移范围0 < z <12内尘埃平均密度与红移的关系。我们显示,基于宇宙“恒星形成历史”的化学演化模型,其中气体流出率等于恒星形成率,可以解释尘埃-恒星质量比的单调上升,并准确重现了尘埃平均密度与红移的关系。

英文摘要

We have carried out a stacking analysis with the COSMOS-Web catalogue on one of the deepest ever SCUBA-2 images at 850 microns, allowing us to estimate the mean submillimetre flux density for samples of galaxies split by stellar mass and morphological class over the redshift range 0<z<12. For all morphological classes, the mean star-formation rate estimated from the dust emission increases with redshift, reaching a value for the most massive galaxies (~10^11 soar masses) of >~80 solar masses per year at 2 < z < 4.5. In this redshift range, the mean star-formation rate for these galaxies falls along the Hubble sequence from ~280 solar masses per year for irregular galaxies at one end to ~80 solar masses per year for spheroids at the other end, which shows that quenching was already happening shortly after the emergence of the Hubble sequence. The decrease in the star-formation rate for the spheroidal galaxies can be reproduced with a `starvation' quenching model with a depletion time of ~10^{8.2} years. We also show that the transformation of `submillimetre galaxies' can reproduce the growth in number-density of massive bulge-dominated and spheroidal galaxies over the redshift range 1.5 <z < 4. As a side-project, we have used our stacking results to show that the ratio of dust mass to stellar mass in galaxies increases with redshift out to z~8 and to determine the relationship between the mean density of dust and redshift in the range 0 < z <12. We show that a chemical evolution model based on the `star-formation history' of the universe, with a gas outflow rate equal to the star-formation rate, can explain the monotonic rise in the dust-to-stellar mass ratio and reproduce the relationship between mean dust density and redshift remarkably accurately.

2605.19650 2026-05-21 physics.acc-ph

Design and development of the P-cubed Target Insertion Device (P$^3$-TID)

P-cubed目标插入装置(P$^3$-TID)的设计与开发

R. Mena-Andrade, J-L. Grenard, K. Guergar, R. Seidenbinder, M. I. Besana, N. Vallis, M. Zykova, D. Hauenstein, R. Zennaro, P. Craievich, A. Perillo-Marcone

AI总结 本文介绍了用于在保罗施特格研究所P-cubed原理验证正电子生产实验中测试新型正电子源靶配置的P-cubed目标插入装置(P$^3$-TID)的设计与开发,重点描述了其机械设计。

Comments 11 pages, 8 figures, submitted to JINST

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AI中文摘要

P-cubed目标插入装置(P$^3$-TID)是一种专为在保罗施特格研究所的P-cubed原理验证正电子生产(P-cubed或P$^3$)实验中测试新型正电子源靶配置而设计的科研仪器。该装置允许方便地安装、定位和更换不同的固定靶。本文详细描述了其机械设计。

英文摘要

The P-cubed Target Insertion Device (P$^3$-TID) is a research instrument dedicated to test novel positron source target configurations inside of the proof-of-principle PSI Positron Production (P-cubed or P$^3$) experiment at the Paul Scherrer Institute. The device allows an easy installation, positioning and replacement of different fixed targets. The present article describes its mechanical design at a detailed level.

2605.19647 2026-05-21 cond-mat.mes-hall

Nonlinear Stabilization of Non-Adiabatic Magnonic Dynamics

非adiabatic磁动力学的非线性稳定化

A. M. Tishin

AI总结 本文提出了一种非线性磁动力学平台,用于在纳米级铁氧体结构中实现受限制的非adiabatic参数激发。通过非线性频率调节器U,研究了非线性调制如何抑制不受控制的参数增长并驱动系统向动态局部化的低占用磁动力学态发展。

Comments 45 pages, 6 figures

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AI中文摘要

我们提出了一种非线性磁动力学平台,用于在纳米级铁氧体结构中实现受限制的非adiabatic参数激发。该方法基于算法,其中非adiabatic性参数被解释为与之相关的局部频谱流率度量,而非线性频率调节器U代表介质的非谐波频谱位移。以Co掺杂的钇铁 garnet YIG Co 作为代表性材料系统,我们分析了非线性调制如何抑制不受控制的参数增长并驱动系统向动态局部化的低占用磁动力学态发展。在截断的Fock基上进行的数值验证显示,有限的调节器U可以抑制泄漏到高阶模式并保持非adiabatic激发下的受限制动力学。实验报告的YIG Co超快切换吸收能量密度对应于估计的切换能量约为22 aJ,为低能耗共振态形成提供了物理相关尺度。我们进一步讨论了磁阻尼、交换间隙限制和声子透明性在维持多次操作周期内相干磁动力学中的作用。这些结果表明,铁氧体纳米结构中的非线性自限制非adiabatic动力学可能为低能耗波基信息处理提供物理基础。

英文摘要

We propose a nonlinear magnonic platform for bounded nonadiabatic parametric excitation in nanoscale ferrite structures. The approach is based on the algorithm, where the non-adiabaticity parameter is interpreted as a local measure of the spectral-flow rate associated with, while the nonlinear frequency regulator U represents the anharmonic spectral detuning of the medium. Using Co doped yttrium iron garnet YIG Co as a representative material system, we analyze how nonlinear detuning suppresses uncontrolled parametric growth and drives the system toward a dynamically localized low-occupancy magnonic state. Numerical verification in truncated Fock bases shows that a finite regulator U can suppress leakage into higher-order modes and preserve bounded dynamics under non-adiabatic excitation. The experimentally reported absorbed energy density for ultrafast switching in YIG Co corresponds to an estimated switching energy of approximately 22 aJ for a cell, providing a physically relevant scale for low-energy resonant state formation. We further discuss the role of magnetic damping, exchange-gap confinement, and phonon transparency in maintaining coherent magnonic dynamics over multiple operation cycles. These results suggest that nonlinear self-limited non-adiabatic dynamics in ferrite nanostructures may provide a physical basis for low-energy wave-based information processing.

2605.19473 2026-05-21 astro-ph.HE

Radio-X-ray Time Lags in GX 339-4: Probing Magnetic Field Transport in Black Hole Accretion

GX 339-4的无线电-X射线时间滞后:探测黑洞吸积中的磁场传输

Dizhan Du, Bei You, Zhen Yan, Yuao Ma, Xinwu Cao

AI总结 通过分析GX 339-4在2010-2011次耀斑期间无线电发射与X射线反斯托克斯亮度之间的时间滞后,研究了黑洞吸积过程中内区磁场传输的机制,发现硬态上升期无线电发射领先X射线反斯托克斯亮度约3天,而硬态衰减期则滞后约8天,内区磁场能够解释这两种状态下的时间滞后差异。

Comments 13 pages, 7 figures, submitted to APJ

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AI中文摘要

我们对GX 339-4在2010-2011次耀斑期间无线电发射与X射线反斯托克斯亮度之间的时间滞后进行了分析。利用插值交叉相关函数(ICCF),我们测量了反斯托克斯亮度与无线电亮度之间的时间滞后,并发现在上升硬态期间,无线电发射领先反斯托克斯亮度约3天。相比之下,在衰减硬态期间,无线电发射滞后反斯托克斯亮度约8天。通过估计质量吸积率和盘截断半径,计算出的内区磁场能够解释衰减硬态期间的无线电滞后和上升硬态期间的无线电领先。进一步比较了不同耀斑中多个源观测到的时间滞后,并讨论了导致这种差异的潜在物理机制。这些结果为理解黑洞X射线双星中内区吸积流与喷流之间演变耦合提供了新的见解。

英文摘要

We present an analysis of the time delay between the radio emission and the X-ray Compton luminosity during the 2010-2011 outburst of GX 339-4. Using the interpolated cross-correlation function (ICCF), we measure the time delay between the Compton luminosity and the radio luminosity, and find that during the rising hard state, the radio emission precedes the Compton luminosity by approximately 3 days. In contrast, in the decaying hard state, the radio emission lags behind the Compton luminosity by about 8 days. By estimating the mass accretion rate and the disk truncation radius, the calculated inner magnetic field can account for both the radio delay in the decaying hard state and the radio precedence in the rising hard state. The time delays observed in different outbursts across multiple sources are compared further, and the underlying physical mechanisms account for this difference are discussed. These results provide insights into the evolving coupling between the inner accretion flow and the jet in black hole X-ray binaries.

2605.19385 2026-05-21 cs.DC cs.DB

LatentBox: Storing AI-Generated Images at Scale via a Latent-First Design

LatentBox:通过一种以潜在特征优先的设计在大规模上存储AI生成的图像

Zirui Wang, Yunjia Zheng, Tingfeng Lan, Zhaoyuan Su, Haoran Ni, Juncheng Yang, Yue Cheng

AI总结 本文提出了一种以潜在特征优先的存储系统LatentBox,用于大规模存储AI生成的图像。通过将压缩的潜在特征作为持久存储对象,并在读取路径上按需使用GPU进行重建,以换取大容量的持久存储节省。

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AI中文摘要

AI生成图像的指数增长给存储基础设施的可持续性带来了挑战。像Midjourney和Adobe Firefly这样的平台已经托管数十亿张生成图像,但传统的对象存储仍将它们作为完整的像素分辨率的blob存储,消耗大量存储容量和带宽。然而,与自然照片不同,AI生成的图像可以从紧凑的、模型原生的潜在张量中确定性地重建,这使得持久图像存储从根本上是冗余的。本文提出了LatentBox,一种用于AI生成图像的潜在优先存储系统。LatentBox将压缩的潜在特征视为耐用的存储对象,并在读取路径上按需使用GPU进行重建,以换取廉价的计算资源换取大规模的持久存储节省。我们的设计受到我们所知的第一项大规模分析AI生成图像访问的指导,基于一个持续35个月、20亿次请求的生产跟踪数据,来自一个主要的生成内容平台。受跟踪分析的启发,LatentBox将频繁访问的图像保留在解码像素格式中以实现快速命中,将较少活跃的对象存储为压缩的潜在特征以扩展有效的缓存容量,并持续调整图像和潜在缓存之间的比例以优化用户感知的访问延迟。我们构建了一个LatentBox原型,并使用生产跟踪数据对其进行评估。LatentBox在持久存储上减少了78.7%,并且在纯图像存储上具有竞争力或更低的平均和尾部延迟。

英文摘要

The explosive growth of AI-generated images has created a sustainability challenge for storage infrastructure. Platforms like Midjourney and Adobe Firefly already host billions of generative images, yet conventional object stores persist them as blobs with full-resolution pixels, consuming huge amounts of storage capacity and bandwidth. Unlike natural photos, however, AI-generated images can be deterministically reconstructed from compact, model-native latent tensors, making persistent image storage fundamentally redundant. This paper presents LatentBox, a latent-first storage system for AI-generated images. LatentBox treats compressed latents as durable storage objects and uses on-demand GPU reconstruction on the read path to trade inexpensive compute for large persistent storage savings. Our design is guided by the first large-scale analysis of AI-generated image access we are aware of, based on a 35-month, 2-billion-request production trace from a major generative-content platform. Motivated by the trace analysis, LatentBox keeps frequently accessed images in decoded pixel format for fast hits, stores less-active objects as compressed latents to expand effective cache capacity, and continuously adjusts the splits between the image and latent cache to optimize user-perceived access latency.We build a LatentBox prototype and evaluate it with the production trace. LatentBox reduces persistent storage by 78.7% with competitive or even lower mean and tail latency over a pure image-based storage.

2605.19363 2026-05-21 hep-th cond-mat.str-el

Non-invertible Symmetries in Weyl Fermions, and Applications to Fermion-Boundary Scattering Problem

Weyl费米子中的非可逆对称性,及其在费米-边界散射问题中的应用

Pengcheng Wei, Yunqin Zheng

AI总结 本文研究了Weyl费米子理论中非可逆拓扑缺陷的构造,并展示了其在费米-边界散射问题中的应用,通过分析G对称的Dirac费米子边界条件,构建了非可逆拓扑缺陷,并探讨了其在有限阿贝尔群规范化的应用。

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AI中文摘要

我们构建了n个Weyl费米子理论中二维理论的一族非可逆拓扑缺陷。该构造依赖于n个Dirac费米子具有G对称的共形边界条件的存在。在展开后,这些边界条件变为n个Weyl费米子的拓扑缺陷D,它们交织了两个G表示,并且通常是非可逆的。对于G=U(1)^n,我们证明D是与规范化有限阿贝尔群Γ相关的对偶缺陷,并给出了确定Γ及其对费米子作用的显式算法。我们还表明,相同的有限阿贝尔群规范化描述也适用于某些受限的例子中非阿贝尔的G。相比之下,对于某些非阿贝尔对称结构,包括出现在1-5-7-8-9问题中的G=SU(2)对称性,我们证明D不能作为规范化任何有限阿贝尔群的对偶缺陷来实现。最后,我们解释了对偶缺陷视角如何提供一种简洁的推导方法,从共形边界推导费米散射。

英文摘要

We construct a family of non-invertible topological defects in two-dimensional theories of $n$ Weyl fermions. The construction relies on the existence of $G$-symmetric conformal boundary conditions for $n$ Dirac fermions. Upon unfolding, these boundary conditions become topological defects $\mathcal D$ of $n$ Weyl fermions that intertwine the two $G$-representations, and they are generically non-invertible. For $G=U(1)^n$, we show that $\mathcal D$ is a duality defect associated with gauging a finite Abelian group $Γ$, and we give an explicit algorithm for determining $Γ$ and its action on the fermions. We also show that the same finite-Abelian gauging description applies in certain restricted examples with non-Abelian $G$. By contrast, for certain non-Abelian symmetry structures, including the $G=SU(2)$ symmetry appearing in the $1$-$5$-$7$-$8$-$9$ problem, we prove that $\mathcal D$ cannot be realized as a duality defect for gauging any finite Abelian group. Finally, we explain how the duality-defect perspective gives a streamlined derivation of fermion scattering from a conformal boundary.

2605.19348 2026-05-21 hep-th

Transition of vortex dipole dynamics in holographic superfluids

超流体的涡偶极子动力学转变

Yu-Kun Yan, Shanquan Lan, Yu Tian, Hongbao Zhang

AI总结 该研究通过全息对偶性揭示了强相互作用超流体中涡偶极子动力学在临界偶极子尺寸以下的转变,其特征是互摩擦显著抑制,通过bulk中涡管的拓扑重连触发该转变,形成U-pipe,从而揭示了尺度依赖的耗散机制。

Comments 6 pages, 4 figures, small modifications

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AI中文摘要

利用全息对偶性,我们揭示了强相互作用超流体中在临界偶极子尺寸以下涡偶极子动力学的转变,其特征是互摩擦显著抑制。在bulk中,该转变由涡管的拓扑重连触发,该过程将边界涡旋与黑洞视界断开并形成U-pipe。因此,转变后的发展由bulk中U-pipe的收缩主导,而非与视界相关的互摩擦,揭示了尺度依赖的耗散机制。我们进一步表明,这种重连在广泛的温度范围内持续存在,即使在高温下转变变得不可观测。我们的结果为强相互作用冷原子实验中观测到的异常临界偶极子尺度提供了基于耗散的解释,并表明强相互作用超流体中存在不同的耗散区域。

英文摘要

Using holographic duality, we reveal a transition in vortex dipole dynamics below a critical dipole size in strongly interacting superfluids, characterized by a significant suppression of mutual friction. In the bulk, this transition is triggered by a topological reconnection of vortex tubes, which disconnects the boundary vortices from the black hole horizon and forms a \textit{U-pipe}. Consequently, the post-transition evolution is governed by the contraction of the bulk \textit{U-pipe} rather than the mutual friction associated with the horizon, revealing a scale-dependent dissipation mechanism. We further show that this reconnection persists over a broad temperature range, even when the transition becomes unobservable at high temperatures. Our results provide a dissipation-based interpretation for the anomalous critical dipole scale observed in strongly interacting cold-atom experiments, and suggest the existence of distinct dissipative regimes in strongly interacting superfluids.

2605.19315 2026-05-21 hep-th cond-mat.mes-hall

Anomalous Hall effect in anisotropic type-II Weyl semimetals

各向异性II型威格勒半金属中的异常霍尔效应

R. Martínez von Dossow, A. Martín-Ruiz, Luis F. Urrutia

AI总结 本文研究了各向异性II型威格勒半金属中的异常霍尔效应,通过非微扰方法计算零温有限密度有效作用,并结合手征动能理论验证结果,揭示了II型区域中线性色散无界性对紫外正则化的需求,以及轴倾斜和各向异性依赖的重整化效应。

Comments Accepted for publication in Physical Review D

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AI中文摘要

我们扩展了之前对倾斜、各向异性威格勒半金属中CPT-奇电磁响应的分析[Phys. Rev. D 109, 065005 (2024)],将其推广到过度倾斜(II型)区域,其中电子和空穴口袋共存于费米能级。从标准模型扩展的最小QED部分出发,结合由晶格启发的各向异性狄拉克哈密顿量(具有倾斜),我们从真空极化张量非微扰地计算零温有限密度有效作用,并通过互补的手征动能理论方法验证结果,该方法一致地纳入了费米海和费米面贡献。在II型区域中,无界线性色散需要物理的紫外正则化。通过实施与晶格带宽相关的硬动量截断,我们证明了CPT-奇、轴子样响应在I型到II型Lifshitz转变过程中保持有限,同时获得与轴倾斜和各向异性相关的重整化效应以及由电子和空穴口袋几何决定的非普遍、截断敏感项。作为具体应用,我们评估了典型II型威格勒半金属WTe₂中的异常霍尔电导率,使用从第一性原理计算和实验提取的参数,发现费米海和费米面贡献相当且部分抵消,产生一个有限且强各向异性的霍尔响应,特征于过度倾斜区域。

英文摘要

We extend our previous analysis [Phys. Rev. D 109, 065005 (2024)] of CPT-odd electromagnetic response in tilted, anisotropic Weyl semimetals to the overtilted (type-II) regime, where electron and hole pockets coexist at the Fermi level. Starting from the minimal QED sector of the Standard-Model Extension matched to a lattice-motivated anisotropic Dirac Hamiltonian with tilt, we compute the zero-temperature finite-density effective action nonperturbatively from the vacuum polarization tensor, and corroborate the result using a complementary chiral kinetic theory formulation that consistently incorporates both Fermi-sea and Fermi-surface contributions. In the type-II regime the unbounded linear dispersion necessitates a physical ultraviolet regularization. Implementing a hard momentum cutoff tied to the lattice bandwidth, we show that the CPT-odd, axion-like response remains finite across the type-I to type-II Lifshitz transition, while acquiring tilt- and anisotropy-dependent renormalizations together with nonuniversal, cutoff-sensitive terms governed by the geometry of the electron and hole pockets. As a concrete application, we evaluate the anomalous Hall conductivity in the prototypical type-II Weyl semimetal WTe$_2$, using parameters extracted from first-principles calculations and experiments, and find that Fermi-sea and Fermi-surface contributions are comparable and partially cancel, yielding a finite and strongly anisotropic Hall response characteristic of the overtilted regime.

2605.19171 2026-05-21 q-bio.TO

A putative model of the gut-muscle axis in aged livestock

老龄家畜肠道-肌肉轴的潜在模型

Karin Suzuki, Aoi Fukushima, Yu Adachi, Tsubasa Irie, Arisa Sano, Daisuke Yamamoto, Hirokuni Miyamoto, Shigeharu Moriya, Makiko Matsuura, Naoko Tsuji, Takashi Satoh, Tamotsu Kato, Takumi Nishiuchi, Hiroshi Ohno, Hiroaki Kodama, Naruki Sato

AI总结 本研究通过多组学分析探讨了老龄家畜肠道-肌肉轴的潜在模型,发现发酵饲料能显著改变肠道微生物群和肌肉代谢物,揭示了肠道代谢物在连接微生物群与肌肉生理中的作用。

Comments 17 pages, 4 figures (5 supplementary figures)

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AI中文摘要

肠道-肌肉轴被认为将肠道微生物群与骨骼肌生理联系起来,但其在不同家畜物种中的普遍性仍不明确。利用具有相对较短消化道的老龄产蛋鸡作为模型,我们通过整合多组学分析研究了食用含Caldifermentibacillus hisashii的发酵饲料或对照饲料的鸡的肠道微生物群、粪便代谢组和胸肌代谢组。非度量多维尺度分析显示,微生物群在组间有明显分离(压力=0.0097),特征是发酵饲料的使用导致乳酸菌显著增加。方差分析显示16S微生物群与粪便(共享R2 adj=0.54)和肌肉(共享R2 adj=0.48)代谢组共享大量方差,并且部分dbRDA显示在控制16S后,粪便-肌肉代谢物关联仍得以保留(直接R2=0.538,部分R2=0.485),这与粪便代谢物作为连接微生物群与肌肉的整合层一致。Cliff's delta基于选择显示蛋白质分解菌群和粪便氨基酸的减少,以及肌肉中鸟氨酸和尿酸的减少和高嘌呤含量的增加。由于两组在屠宰后处理相同,这些差异反映了体内状态:尽管细菌蛋白质分解能力减少,但宿主利用增强,而尿酸的减少表明高效的氮周转而非积累。总体而言,这些发现支持了老龄产蛋鸡肠道-肌肉轴的潜在三联模型,为理解微生物对老龄家畜肌肉生理的贡献提供了统计学基础的框架。

英文摘要

The gut-muscle axis has been proposed to link gut microbiota with skeletal muscle physiology, yet its universality across livestock species remains unclear. Using aged laying hens, a livestock model with a relatively short digestive tract, we examined the gut microbiota, faecal metabolome, and breast-muscle metabolome by integrative multi-omics analyses in hens fed a Caldifermentibacillus hisashii-containing fermented feed or a control diet. Non-metric multidimensional scaling revealed clear separation of the microbial community between groups (stress = 0.0097), characterised by a marked expansion of Lactobacillus with the administration of the fermented feed. Variance partitioning showed that the 16S microbiota shared substantial variance with both the faecal (shared R2 adj = 0.54) and muscle (shared R2 adj = 0.48) metabolomes, and partial dbRDA demonstrated that the faecal-to-muscle metabolite association was largely retained after controlling for 16S (direct R2 = 0.538, partial R2 = 0.485), consistent with faecal metabolites acting as an integral layer linking microbiota to muscle. Cliff's delta-based selection showed depletion of proteolytic taxa and faecal amino acids, and reduced muscle Ornithine and uric acid alongside elevated Hypoxanthine. Because both groups were processed identically post-slaughter, these differences reflect in vivo states: amino acid depletion despite reduced bacterial proteolytic capacity points to enhanced host utilisation, and reduced uric acid, a post-mortem-stable purine end-product in uricotelic chickens, indicates efficient nitrogen turnover rather than accumulation. Collectively, these findings support a putative tripartite model of the gut-muscle axis in aged laying hens, providing a statistically grounded framework for understanding microbial contributions to muscle physiology in aged livestock.

2605.19070 2026-05-21 q-bio.NC

Computational Auditory Periphery Models: the Return of the Rodent

计算听觉外周模型:啮齿类动物的回归

Morgan Thienpont, F. Deloche, S. Keshishzadeh, D. Kiselev, J. Bourien, J. -L. Puel, B. N. Buran, N. Bramhall, S. Verhulst

AI总结 本文提出了一种跨物种的计算听觉外周模型,用于研究感音神经性听力损失(SNHL)的跨物种研究,通过调整物种特异性解剖和生理参数,验证了模型在不同物种中的有效性。

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AI中文摘要

动物实验为听觉功能提供了许多见解,特别是在感音神经性听力损失(SNHL)的情况下。然而,这些发现如何转化为临床相关的人类听觉系统并不总是清楚。跨物种的听觉外周计算模型可以帮助弥合非侵入性人类诊断与动物研究实验证据之间的差距。在本工作中,我们适应了一个为人类听觉外周设计的1D非线性耳蜗传输线模型,用于小鼠和豚鼠,从而实现了跨物种研究SNHL的单一计算框架。物种特异性解剖和生理参数,包括基底膜(BM)长度和宽度、镫骨面积、中耳转移函数和频率范围,被调整以匹配每种物种的听觉外周和听觉范围。其他耳蜗参数被校准以重现真实的耳蜗调谐和压缩。适应后的小鼠和豚鼠模型被验证与实验BM速度水平增长特性、听神经(AN)调谐曲线和DPOAEs相匹配。模拟的听神经输出合理匹配了实测数据,包括真实的听神经阈值和频率选择性。然而,耳蜗部分更接近基底或尖端时,模拟与测量之间的差异会增大。模拟耳蜗突触病理性表现再现了从小鼠和豚鼠中记录到的听觉脑干和包络跟随响应差异。基于DPOAEs对小鼠模型的OHC个体化未能忠实重现个体测量,尽管组间OHC损伤差异被捕捉。我们的发现表明,生物物理基础的听觉模型可以跨物种转换,同时保持真实的声音编码属性和病理改变。

英文摘要

Animal experiments have provided many insights on auditory function, notably in cases of sensorineural hearing loss (SNHL). However, it is not always clear how these findings translate to the human auditory system in clinically relevant contexts. Cross-species computational models of the auditory periphery can help bridge the gap between non-invasive human diagnostics and experimental evidence from animal studies. In this work we adapted a 1-D nonlinear cochlear transmission-line model designed for the human auditory periphery to mouse and gerbil, enabling a single computational framework for cross-species research on SNHL. Species-specific anatomical and physiological parameters - including basilar membrane (BM) length and width, stapes area, middle-ear transfer functions, and frequency range - were adjusted to match each species' auditory periphery and hearing range. Other cochlear parameters were calibrated to reproduce realistic cochlear tuning and compression. The adapted mouse and gerbil models were validated against experimental BM velocity level-growth characteristics, auditory-nerve (AN) tuning curves, and DPOAEs. Simulated AN outputs reasonably matched empirical measurements, including realistic AN thresholds and frequency selectivity. However, the discrepancy between simulations and measurements became larger for cochlear sections closer to the base or apex. Simulations of cochlear synaptopathy reproduced observed differences in recorded auditory brainstem and envelope following responses from mice and gerbils with SNHL. OHC individualization of the mouse model based on DPOAEs failed to faithfully reproduce individual measurements, although intergroup differences in OHC damage were captured. Our findings demonstrate that biophysically grounded auditory models can be translated across species while preserving realistic sound-coding properties and pathophysiological alterations.

2605.18901 2026-05-21 cs.CR cs.CY

Towards Zero Trust Architecture: A Pilot Study on Information Systems Security Readiness amongst Small and Medium Enterprises

迈向零信任架构:对中小企业信息系统安全准备度的试点研究

Yu Deng, Anushia Inthiran

AI总结 本研究探讨了中小企业在采用零信任架构方面的驱动因素和障碍,并提出了一种探索性的分阶段采纳路径,通过调查64名亚太地区IT和安全专业人员的数据,发现零信任架构熟悉度和云计算需求是感知必要性的最强正相关因素,而累积障碍与感知必要性呈弱负相关,身份和访问管理复杂性和可扩展性成为主要实施障碍,研究提出了分三阶段的路线:加强身份治理、分割高价值资产、引入有针对性的监控,以适应运营能力。

Comments 16 pages, 2 figures, 8 tables. Accepted at PACIS 2026

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AI中文摘要

中小企业面临日益增长的网络威胁,但往往缺乏采用零信任架构(ZTA)所需的资源和专业知识。本试点研究探讨了塑造中小企业对ZTA必要性感知的驱动因素和障碍,并提出了一种探索性的分阶段采纳路径。来自亚太地区64名IT和安全专业人员的调查数据显示,ZTA熟悉度和云计算需求是感知必要性的最强正相关因素,而累积障碍仅与感知必要性呈弱负相关。身份和访问管理复杂性和可扩展性成为主要实施障碍。基于这些发现,我们提出了一条三阶段路线:加强身份治理、分割高价值资产、并引入有针对性的监控,以符合运营能力。本研究为资源受限企业更现实的零信任转型提供了早期证据。

英文摘要

Small and medium enterprises (SMEs) face growing cyber threats but often lack the resources and expertise needed to adopt Zero Trust Architecture (ZTA). This pilot study examines the drivers and barriers shaping SME perceptions of ZTA necessity and proposes an exploratory staged adoption path. Survey data from 64 IT and security professionals in the Asia-Pacific region show that ZTA familiarity and cloud-computing needs are the strongest positive correlates of perceived necessity, whereas accumulated barriers show only a weak negative association. Identity and access management complexity and scalability emerge as the main implementation hurdles. Based on these findings, we propose a three-stage route for SMEs: strengthening identity governance, segmenting high-value assets, and introducing targeted monitoring in line with operational capacity. The study offers early evidence for more realistic Zero Trust transitions in resource-constrained firms.

2605.18360 2026-05-21 hep-ph

Nested-GPT for variable-multiplicity parton showers: A case study in the resummation of non-global logarithms

Nested-GPT用于可变多重性夸克喷注:非全局对数重叠的重叠研究案例

Wanchen Li, Ding Yu Shao, Hao-Zhe Shi, Yu-Xuan Sun

AI总结 本文提出Nested-GPT,一种分层自回归Transformer架构,用于模拟可变多重性夸克喷注历史。通过研究大N_c极限下的非全局对数重叠的leading-logarithmic重叠,利用随机蒙特卡洛二极管喷注生成参考训练数据,系统评估了Nested-GPT与Transformer流匹配基线的性能。流匹配框架成功参数化固定多重性的发射动量学分布,但其相空间表示需要外部指定最终发射数量而非动态生成。相反,Nested-GPT严格强制有序马尔可夫分支结构,按顺序预测发射并动态评估学习的序列终止条件。通过两种互补的训练模式(直接训练在被 veto 的历史和包容训练后分析级 veto)使用gap分数可观测性对两种方法进行基准测试。生成的样本在考虑的可观测性内与参考喷注在统计不确定性范围内一致。这些结果证明了Nested-GPT作为可变多重性喷注生成器的物理一致的自回归替代方案,并推动了次主导对数重叠和有限N_c色演变的扩展。

Comments 12 pages, 5 figures

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AI中文摘要

我们引入Nested-GPT,一种分层自回归Transformer架构,用于模拟可变多重性夸克喷注历史。作为受控基准,我们研究了大N_c极限下非全局对数重叠的leading-logarithmic重叠,利用随机蒙特卡洛二极管喷注生成参考训练数据。我们系统地评估了Nested-GPT与Transformer流匹配基线。流匹配框架成功参数化固定多重性的发射动量学分布。其相空间表示,然而,需要外部指定最终发射数量而非动态生成。相反,Nested-GPT严格强制有序马尔可夫分支结构,按顺序预测发射并动态评估学习的序列终止条件。我们通过两种互补的训练模式(直接训练在被 veto 的历史和包容训练后分析级 veto)使用gap分数可观测性对两种方法进行基准测试。生成的样本在考虑的可观测性内与参考喷注在统计不确定性范围内一致。这些结果证明了Nested-GPT作为可变多重性喷注生成器的物理一致的自回归替代方案,并推动了次主导对数重叠和有限N_c色演变的扩展。

英文摘要

We introduce Nested-GPT, a hierarchical autoregressive Transformer architecture for simulating the variable-multiplicity parton-shower histories. As a controlled benchmark, we study the leading-logarithmic resummation of non-global logarithms in the large-$N_c$ limit, utilizing a stochastic Monte Carlo dipole shower to generate reference training data. We systematically evaluate Nested-GPT against a Transformer flow-matching baseline. The flow-matching framework successfully parameterizes the joint distribution of emission kinematics at fixed multiplicity. Its phase-space representation, however, requires the final number of emissions to be specified externally rather than generated dynamically. Conversely, Nested-GPT strictly enforces the ordered Markovian branching structure, predicting emissions sequentially and dynamically evaluating a learned sequence-termination condition. We benchmark both approaches using gap fraction observables under two complementary training regimes: direct training on vetoed histories and inclusive training followed by an analysis-level veto. The resulting generated samples agree with the reference shower within statistical uncertainties for the observables considered. These results establish Nested-GPT as a physically consistent autoregressive surrogate for variable-multiplicity shower generator and motivate extensions to subleading-logarithmic resummation and finite-$N_c$ color evolution.

2605.18274 2026-05-21 math.CO

Max-tree for d-permutations and pattern avoidance

d-排列与模式避免的max-tree

Thomas Muller

AI总结 本文研究了d-排列与模式避免之间的关系,提出了一种将d-排列映射到d-ary树的算法,解决了Bonichon和Morel提出的猜想。

Comments 20 pages, 12 figures

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AI中文摘要

高维排列是d-1个排列的元组,可以与d维网格中的点集对应。在N. Bonichon和P.-J. Morel的论文中,提出了关于模式避免d-排列计数的若干猜想。本文考虑了一种将d-排列映射到2^{d-1}-ary树的映射,该映射自然地推广了经典排列的max-tree构造。然后证明,当限制在避免(21,12)和231模式的d-排列时,该映射与d-ary树之间存在双射关系。这一结果解决了Bonichon和Morel提出的其中一个猜想。

英文摘要

Higher dimensional permutations are tuples of d-1 permutations that can be identified with a point set in a d-dimensional grid. In N. Bonichon and P.-J. Morel, {\it J. Integer Sequences} 25 (2022), several conjectures regarding the enumeration of pattern avoiding d-permutations were stated. In this paper, we consider a mapping from d-permutations to $2^{d-1}-$ary trees that naturally generalizes the classical max-tree construction for permutations. We then show that, when restricted to d-permutations avoiding (21,12) and 231, this mapping yields a bijection with d-ary trees. This result resolves one of the conjectures of Bonichon and Morel.

2605.18159 2026-05-21 quant-ph cs.ET

Measurement-Driven Adaptive Low-Overhead Implementation of Multi-Controlled Toffoli Gates

基于测量的自适应低开销多控制Toffoli门实现

Abhoy Kole, Till Schnittka, Rolf Drechsler

AI总结 本文提出了一种基于测量的自适应低开销多控制Toffoli门实现方法,通过自适应电路执行和辅助粒子构造,系统性地减少了纠缠门数量、T计数和T深度,同时保持容错保证。

Journal ref 2026 IEEE 29th International Symposium on Design and Diagnostics of Electronic Circuits and Systems (DDECS)

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AI中文摘要

Toffoli门是量子算术和可逆逻辑的基本构建块,但其高效实现仍然是近期和容错量子架构中的主要挑战。近年来,动态量子电路能力的进步,包括中间电路测量和经典反馈,为减少非Clifford操作的资源开销提供了新机会。在本文中,我们提出了一种多控制Toffoli门的动态分解策略集,利用自适应电路执行和辅助粒子构造。我们的方法系统性地减少了纠缠门数量、T计数和T深度,与传统静态分解相比,同时保持容错保证。通过分析成本模型和实验评估,我们证明相对相位原语和测量条件修正能够实现可扩展的实现,具有改进的深度和资源效率。

英文摘要

The Toffoli gate is a fundamental building block for quantum arithmetic and reversible logic, yet its efficient realization remains a major challenge in both near-term and fault-tolerant quantum architectures. Recent advances in dynamic quantum circuit capabilities, including mid-circuit measurement and classical feedforward, provide new opportunities for reducing the resource overhead of non-Clifford operations. In this work, we propose a set of dynamic decomposition strategies for multi-controlled Toffoli gates that exploit adaptive circuit execution and ancilla-assisted constructions. Our methods systematically reduce entangling-gate count, T-count, and T-depth compared with conventional static decompositions, while preserving fault-tolerance guarantees. Through analytical cost models and experimental evaluation, we demonstrate that relative-phase primitives and measurement-conditioned corrections enable scalable implementations with improved depth and resource efficiency.

2605.18139 2026-05-21 cond-mat.quant-gas nlin.PS quant-ph

Confinement-controlled pattern selection in a finite population-imbalanced dipolar Bose-Einstein condensate

受限于约束的模式选择在有限人口不平衡双极玻色-爱因斯坦凝聚体中

Zhenhao Wang, Weijing Bao, Jia-Rui Luo, Gentaro Watanabe, Kui-Tian Xi

AI总结 研究有限人口不平衡双极玻色-爱因斯坦凝聚体在圆柱形准二维箱中的基态密度模式,通过平均场模型绘制相图,揭示人口不平衡如何选择模式拓扑结构,以及箱尺寸对模式间距的影响。

Comments 10 pages, 6 figures

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AI中文摘要

我们研究了在圆柱形准二维箱中受限的有限人口不平衡双极玻色-爱因斯坦凝聚体的基态密度模式。利用平均场模型,我们绘制了相图,作为轴向约束、相互作用不平衡和人口比的函数。该系统支持丰富的静态形态序列,包括近似均匀的煎饼态、煎饼-滴状和环-滴状共存态、滴状阵列以及同心环。这些模式与双阻聚物系统中的微相分离形态有密切的结构对应关系,其中人口不平衡起着有效体积分数的作用,选择模式拓扑结构。密度分布和结构因子的分析表明,调制态具有内在非零的特征波矢,当箱尺寸变化时,其基本保持不变。我们还发现,特征模式间距与轴向约束长度成线性关系,表明凝聚态的横向厚度控制了有效平面长度标度。在有限的圆形箱中,这种平滑的标度被离散的步骤打断,反映了几何失真和环或滴数的整数锁定。我们的结果表明,箱束缚的双极混合物为研究量子流体中有限尺寸模式选择和非局部微相形成提供了可控的平台。

英文摘要

We study the ground-state density patterns of a population-imbalanced two-component dipolar Bose-Einstein condensate confined in a circular quasi-two-dimensional box. Using a mean-field model, we map out phase diagrams as functions of the axial confinement, interaction imbalance, and population ratio. The system supports a rich sequence of stationary morphologies, including a nearly uniform pancake state, pancake-droplet and ring-droplet coexistence states, droplet arrays, and concentric rings. These patterns show a close structural correspondence to microphase-separated morphologies in diblock-copolymer systems, with the population imbalance acting as an effective volume fraction that selects the pattern topology. Analysis of the density profiles and structure factors reveals that the modulated states possess an intrinsic nonzero characteristic wave vector, which remains essentially unchanged when the box size is varied. We also find that the characteristic pattern spacing scales linearly with the axial confinement length, indicating that the transverse thickness of the condensate controls the effective in-plane length scale. In a finite circular box, this smooth scaling is interrupted by discrete steps, reflecting geometric frustration and the integer locking of the number of rings or droplets. Our results show that box-trapped dipolar mixtures provide a controllable platform for studying finite-size pattern selection and nonlocal microphase formation in quantum fluids.

2605.18135 2026-05-21 gr-qc astro-ph.IM

The impact of seasonality over the sensitivity of Einstein Telescope and the SNR of CBC signals at the Sardinia candidate site

季节性对爱因斯坦望远镜灵敏度及引力波信号SNR的影响:萨尔蒂尼亚候选址

Matteo Di Giovanni, Davide Rozza, Giovanni Diaferia, Andrea Contu, Rosario De Rosa, Carlo Giunchi, Luca Naticchioni, Marco Olivieri, Annalisa Allocca, Enrico Calloni, Giovanni Luca Cardello, Luciano Errico, Giovanni Losurdo, Irene Molinari, Lucia Trozzo, Domenico D'Urso

AI总结 本文研究了季节性地震噪声对萨尔蒂尼亚候选址爱因斯坦望远镜低频性能的影响,探讨了其对致密二体合并观测的启示。通过2022至2025年间深井收集的地震数据,分析了月度噪声变化,确定了代表性的最佳和最差情况,对应7月和12月。利用测量的地震谱估计2-10Hz频段的牛顿噪声贡献,并推导出修改后的ET灵敏度曲线。这些曲线被用于模拟框架中,评估其对二元中子星和中等质量黑洞信号信噪比(SNR)的影响。结果表明,萨尔蒂尼亚站点的低地震噪声导致探测器灵敏度仅有轻微的季节性变化。对应的SNR影响仅限于几个百分点,即使不考虑牛顿噪声缓解措施。这些结果表明,季节性环境波动对早期启发的致密二体探测性影响较小,证实了萨尔蒂尼亚站点实现ET低频灵敏度目标的适宜性。

Comments arXiv admin note: text overlap with arXiv:2503.02166

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AI中文摘要

本工作研究了季节性地震噪声对爱因斯坦望远镜(ET)在萨尔蒂尼亚候选址低频性能的影响,重点探讨了其对致密二体合并观测的启示。利用2022至2025年间在深井中收集的地震数据,我们分析了月度噪声变化,并确定了代表性的最佳和最差情况,分别对应7月和12月。测量的地震谱用于估计2-10Hz频段的牛顿噪声贡献,并推导出修改后的ET灵敏度曲线。这些曲线被应用于模拟框架中,以评估其对二元中子星和中等质量黑洞信号信噪比(SNR)的影响,假设采用三角形ET配置。我们发现,萨尔蒂尼亚站点的低地震噪声导致探测器灵敏度仅有轻微的季节性变化。相应的SNR影响限于几个百分点,即使不包括牛顿噪声缓解措施。这些结果表明,季节性环境波动对早期启发的致密二体探测性影响较小,证实了萨尔蒂尼亚站点实现ET低频灵敏度目标的适宜性。

英文摘要

This work investigates the impact of seasonal variations in seismic noise on the low-frequency performance of the Einstein Telescope (ET) at the Sardinia candidate site, focusing on implications for compact binary coalescence observations. Using seismic data collected between 2022 and 2025 in deep boreholes, we characterize monthly noise variations and identify representative best and worst case scenarios, corresponding to July and December. The measured seismic spectra are used to estimate the Newtonian noise contribution in the 2-10 Hz band and to derive modified ET sensitivity curves. These are implemented in a simulation framework to evaluate their effect on the signal-to-noise ratio (SNR) of binary neutron star and intermediate mass black hole signals, assuming the triangular ET configuration. We find that the low seismic noise of the Sardinia site results in only minor seasonal variations in detector sensitivity. The corresponding impact on SNR is limited to a few percent, even without including Newtonian noise mitigation. These results indicate that seasonal environmental fluctuation have a minor effect on the early inspired detectability of compact binaries, confirming the suitability of the Sardinia site for achieving ET low-frequency sensitivity goals.

2605.18046 2026-05-21 physics.gen-ph

Synergetic capacity planning of private and public EV charging piles via city-scale multiobjective optimization

通过城市级多目标优化实现私人和公共电动汽车充电堆的协同能力规划

Yiwu Hao, Hong Yuan, Nan Zhou, Minda Ma

AI总结 本文提出了一种基于需求驱动的城市级电动汽车充电需求评估和充电堆容量规划框架,采用自底向上的估算方法量化电力需求,并利用Harris Hawks Optimization算法解决容量规划问题,通过2022-2030年中国重庆的案例研究,展示了充电需求的变化趋势和优化配置的综合性能。

Comments Following additional internal review, the authors identified possible errors associated with the results presented in Fig. B1, which may influence the validity of the related results interpretation and discussion sections. The manuscript is therefore withdrawn to allow comprehensive re-analysis and correction

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AI中文摘要

快速发展的电动汽车(EV)需求需要优化的充电基础设施来弥合车辆增长与充电器供应之间的持续差距。本研究开发了一种需求驱动的框架,用于城市级电动汽车充电需求评估和充电堆容量规划。它采用自底向上的估算方法量化电力需求,并利用Harris Hawks Optimization算法解决容量规划挑战,捕捉不同动力类型在时空上的需求变化,并指导2022-2030年中国重庆的充电堆分配。结果表明,(1)与2022年6月相比,到2024年底,每月电动汽车电力消耗三倍增加至57.5太瓦时,表现出显著的季节性波动和结构转变,其中插电式混合动力汽车和增程式电动汽车的总占比达到57.6%,需要向技术特定的基础设施规划过渡;(2)历史评估揭示了明显的空间不匹配,实际部署集中在城市核心区域,而公共充电能力始终落后于需求,而所提出的优化配置在平衡“核心-郊区-远郊”层级的服务充足性方面取得了0.28的综合性能分数,远高于实际部署的0.65;(3)到2030年,重庆预计需要约180万个充电单元以维持稳定的私人-公共比例为9:1,协同策略预计能显著缓解城乡服务差距,提高整体系统韧性和电网兼容性。最终,本研究提供了一种灵活、空间明确的工具,为政策制定者支持可持续和成本效益的电动汽车基础设施部署,以符合长期电动化目标。

英文摘要

Rapid electric vehicle (EV) expansion necessitates optimized charging infrastructure to bridge the persistent gaps between vehicle growth and charger availability. This study develops a demand-driven framework for city-scale EV charging demand assessment and charging pile capacity planning. It employs a bottom-up estimation approach to quantify electricity demand and a Harris Hawks Optimization algorithm to solve capacity planning challenges, capturing spatiotemporal demand variations across powertrain types and guiding allocation over 2022-2030 in Chongqing, China. The results show that (1) compared with June 2022, monthly EV electricity consumption tripled to 57.5 gigawatt-hours by the end of 2024, characterized by significant seasonal volatility and a structural shift in which the combined share of plug-in hybrid electric vehicles and extended-range electric vehicles reached 57.6%, necessitating a transition toward technology-specific infrastructure planning; (2) historical evaluations reveal a marked spatial mismatch, with actual deployment heavily concentrated in the urban core while public charging capacity consistently lagging behind demand, whereas the proposed optimized configuration achieved a superior comprehensive performance score of 0.28, compared to 0.65 for actual deployment, in balancing service adequacy across the "Core-Suburban-Exurban" hierarchy; and (3) by 2030, Chongqing is projected to require approximately 1.8 million charging units to sustain a stable 9:1 private-to-public ratio, a synergetic strategy expects to significantly mitigate urban-rural service disparities and enhance overall system resilience and grid compatibility. Ultimately, this study provides a versatile, spatially explicit tool for policymakers to support sustainable and cost-effective EV infrastructure deployment aligned with long-term electrification targets.

2605.17848 2026-05-21 cs.GT

Learning Empirical Evidence Equilibria under Weak Environmental Coupling

在弱环境耦合下学习经验证据均衡

Aya Hamed, Jason R. Marden, Jeff S. Shamma

AI总结 本文研究了在环境动态由外生因素和智能体行动共同驱动的游戏,探讨了在Q值迭代中,智能体基于有限观察形成信念模型、计算Q值并得出贪心策略的行为,证明在弱耦合条件下经验证据均衡的出现,并扩展到softmax策略,建立了在足够耦合条件下的一致性结果。

Comments 10 pages, 4 figures

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AI中文摘要

战略多智能体系统本质上由去中心化、不确定性和模糊性特征定义。在有限观察下,智能体通常需要基于简化内部环境模型做出决策,这反映了计算能力和环境知识的有限理性。经验证据均衡(EEE)框架通过将每个智能体建模为从部分环境观察中获得信号而形成的可能不准确的信念来显式考虑这些限制。由此产生的均衡概念捕捉了在有限理性和去中心化下的系统稳态。在本文中,我们研究了环境动态由外生因素和智能体行动共同驱动的游戏。我们分析了在Q值迭代中,每个智能体独立形成信念模型、计算Q值并得出贪心策略的行为,但所有智能体的集体行动共同塑造每个智能体在下一阶段所面对的环境。我们证明,尽管存在去中心化,当智能体行动与环境之间的耦合足够弱时,EEE会从联合动态中出现。我们进一步将这一结果扩展到softmax策略,建立了在足够耦合条件下的一致性结果。

英文摘要

Strategic multi-agent systems are fundamentally characterized by decentralization, uncertainty, and ambiguity. Agents operating under limited observations will often need to make decisions based on simplified internal models of the environment, reflecting bounded rationality in both computational capacity and environmental knowledge. The Empirical Evidence Equilibrium (EEE) framework explicitly accounts for these limitations by modeling each agent as forming a potentially misspecified belief derived from signals obtained through partial observations of the environment. The resulting equilibrium concept captures the system's steady state under bounded rationality and decentralization. In this work, we study games in which the environment dynamics are driven jointly by exogenous factors and agents' actions. We analyze agent behavior under Q-value iteration where each agent independently forms a belief model, computes Q-values, and derives a greedy strategy, yet the collective actions of all agents jointly shape the environment each agent faces at the next stage. We prove that despite this decentralization, an EEE emerges from the joint dynamics when the coupling between agents' actions and the environment is sufficiently weak. We further extend this result to softmax policies, establishing a contraction result under a sufficient coupling condition.

2605.17840 2026-05-21 gr-qc astro-ph.HE cond-mat.stat-mech hep-th

Pole Skipping, Avoided Crossing, and Resonant Excitation in Kerr Quasinormal Modes near Algebraically Special Frequencies

极点跳变、避让交叉和共振激发在 Kerr 非线性正常模式接近代数特殊频率附近

Kei-ichiro Kubota, Hayato Motohashi

AI总结 研究探讨了Kerr非线性正常模式在接近代数特殊频率时的异常行为,揭示了极点跳变和消失现象的物理起源,通过分析格林函数构建块的极点和零点,发现极点跳变由共振激发引起的避让交叉导致,而消失则由非线性正常模式极点与马士巴模式零点的抵消引起。

Comments 12 pages, 20 figures. Associated code and animations are available at https://doi.org/10.5281/zenodo.19688891

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AI中文摘要

Kerr 非线性正常模式在接近代数特殊频率时表现出异常行为,包括明显的分叉、消失以及与Schwarzschild极限的非平滑连接,这种现象已困扰学术界数十年。通过跟踪格林函数构建块在不同黎曼片上的极点和零点,我们表明分叉是由伴随共振激发的避让交叉引起的,而消失则由非线性正常模式极点与马士巴模式零点的抵消所导致。这揭示了这些长期存在的异常现象的物理本质。

英文摘要

Kerr quasinormal modes near algebraically special frequencies exhibit anomalous behavior, including apparent bifurcation, disappearance, and a nonsmooth connection to the Schwarzschild limit, which has remained puzzling for decades. Tracking poles and zeros of Green-function building blocks across different Riemann sheets, we show that the bifurcation is due to an avoided crossing accompanied by resonant excitation, while the disappearance is due to pole skipping caused by cancellation of a quasinormal-mode pole by a Matsubara-mode zero. This resolves the physical origin of these long-standing anomalies.

2605.17604 2026-05-21 quant-ph cond-mat.dis-nn

Schedule-dependent basin occupation in a programmable quantum annealer

在可编程量子退火机中与调度相关的盆地占据

Luis Lozano

AI总结 该研究探讨了在可编程量子退火机上运行混合反常12个量子比特Ising实例时,逆退火过程的晚期子系统自相关性在设备校准的有效温度下严格介于两个平衡参考过程之间,揭示了调度对盆地占据的影响以及反退火调度作为实例特定的盆地占据探测器的作用。

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AI中文摘要

在两个D-Wave代际Advantage2 Zephyr和Advantage_system6.4 Pegasus上运行的混合反常12量子比特Ising实例中,晚期时间子系统自相关性在逆退火循环过程中严格介于两个平衡参考过程之间,即局部化的并行温度控制和非局部化的平衡路径积分量子退火,在设备校准的有效温度下。该结果在所有三个测试的调度和两个硬件校准下均成立。我们通过两种成分获得此结果:一种是用于探测设备暂停点动态的循环逆退火协议(reinitialize_state=False,每提交50次循环)以及一种并行温度控制的否定框架,结合偏倚校正和加速的Bootstrap 95%置信区间。在对Advantage2测试的18个(实例,调度)组合中,有三个是PT不匹配的,对应两个不同的Ising实例;一个独立的原生图控制在第三个混合反常实例上没有次要嵌套,重现了相同的不匹配方向。在20个随机训练实例中,调度形状在六个十三个多盆地读出实例上调节了盆地占据,主导配置的偏移高达38个百分点,包括主导配置的变化。一个预先注册的线性预测器,从可计算的景观特征中提取,对十个保留实例失败,表明调度敏感性无法用简单的线性函数表示测试景观的矩。该括号结果修正了之前的两个暂停增强声明,并将反退火调度重新框架为实例特定的盆地占据探测器,而不是通用的量子增强旋钮。

英文摘要

On a mixed-frustration 12-qubit Ising instance run on two D-Wave generations, Advantage2 Zephyr and Advantage_system6.4 Pegasus, the late-time subsystem autocorrelation under cycled reverse annealing sits strictly between two equilibrium reference processes at the device-calibrated effective temperature: localized parallel tempering, and delocalized equilibrated path-integral simulated quantum annealing at a fixed Advantage2 pause-point transverse-field scale. The bracket holds on all three tested schedules and at both hardware calibrations. We obtain this result through two ingredients: a cycled reverse-anneal protocol (reinitialize_state=False, 50 cycles per submission) used as a Markov-chain probe of the device's pause-point dynamics, and a parallel-tempering falsification framework with bias-corrected and accelerated bootstrap 95% confidence intervals. Of eighteen tested (instance, schedule) combinations on Advantage2, three are PT-unmatched and correspond to two distinct Ising instances; an independent native-graph control with no minor embedding on a third mixed-frustration instance reproduces the same direction of mismatch. Among twenty random training instances, schedule shape modulates basin occupation on six of the thirteen multi-basin-in-readout instances, with dominant-configuration shifts of up to 38 percentage points including changes of the dominant configuration. A pre-registered linear predictor of schedule sensitivity from exhaustively computable landscape features fails on ten held-out instances, indicating that schedule sensitivity is not captured by simple linear functions of the tested landscape moments. The bracketing result revises an earlier two-pause-enhancement claim and reframes reverse-anneal schedules as instance-specific basin-occupation probes rather than universal quantum-enhancement knobs.

2605.17520 2026-05-21 cond-mat.supr-con cond-mat.str-el

Enhanced $s^\pm$-wave superconductivity in electron-doped La$_3$Ni$_2$O$_7$

在电子掺杂La$_3$Ni$_2$O$_7$中增强的$s^\pm$波超导性

Xun Liu, Chao Deng, Wenfeng Wu, Liang Si, Mi Jiang

AI总结 研究探讨了电子掺杂对镍酸盐超导体中$s^\pm$波超导性的影响,通过理论计算发现电子掺杂普遍增强了超导性,特别是在异质结构中表现出更高的临界温度。

Comments 7 Pages, 5 figures and supplementary material

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AI中文摘要

在铜基超导体中,电子掺杂导致超导临界温度$T_c$显著低于空穴掺杂。对于最近发现的镍酸盐超导体,类似的掺杂策略变得更加具有挑战性。因此,尽管空穴掺杂的鲁德雷登-波珀(RP)镍酸盐已被广泛研究,但电子掺杂的RP镍酸盐在实验和理论上都很少被探索。本文通过系统研究两种轨道双层模型,针对三种代表性系统:常压下的本征La$_3$Ni$_2$O$_7$和15 GPa压力下的本征La$_3$Ni$_2$O$_7$,以及提供可行电子掺杂实验途径的异质结构La$_3$Ni$_2$O$_7$:La$_3$Al$_2$O$_7$,利用第一性原理计算和大规模动态簇量子蒙特卡洛模拟,发现电子掺杂在所有三种情况下普遍增强了$s^\pm$波配对超导性(SC),其中异质结构在欠掺杂区域表现出最高的$T_c$。此外,我们的结果表明,配对在$d_{x^2-y^2}$轨道上,由$d_{z^2}$轨道上的配对诱导,起着关键作用。这项工作为电子掺杂RP镍酸盐中的增强超导性提供了理论预测,并呼吁未来的实验验证。

英文摘要

In cuprates, electron doping yields a much lower superconducting $T_c$ than hole doping. For recently discovered nickelate superconductors, the analogous doping strategies become more challenging. Consequently, while hole-doped Ruddlesden-Popper (RP) nickelates have been extensively studied, electron-doped RP nickelates remain rarely explored both experimentally and theoretically. Here we fill this gap by systematically investigating the two-orbital bilayer model for three representative systems: bulk La$_3$Ni$_2$O$_7$ at ambient pressure and 15\,GPa, and a heterostructure La$_3$Ni$_2$O$_7$:La$_3$Al$_2$O$_7$ that provides a feasible experimental route to electron doping. Using first-principle calculations and large-scale dynamical cluster quantum Monte Carlo simulations, we find that electron doping generically enhances $s^\pm$-wave pairing superconductivity (SC) in all three cases, with the heterostructure showing the highest $T_c$ in the underdoped regime. Furthermore, our results suggest an inter-orbital cooperative mechanism that the pairing on the $d_{x^2-y^2}$ orbital, induced by that on the $d_{z^2}$ orbital, plays a vital role in the SC. This work provides the theoretical prediction of enhanced SC in electron-doped RP nickelates and calls for future experimental verification.

2605.17464 2026-05-21 math.OC

Fully Discrete High-Order DG Schemes for Waves: Dispersion and Observability

完全离散的高阶DG方案用于波浪:色散与可观察性

Yunzhang Li, Xiaoyang Wang, Enrique Zuazua

AI总结 本文研究了一维波动方程的完全离散近似中$P^k$(局部)间断Galerkin方法的谱结构、数值色散和可观察性。通过分析耦合的时空数值色散,揭示了一种捕获机制,迫使物理和虚假模式的群速度在选定频率下消失。在此机制下,我们建立了可观测性常数的指数爆炸$\exp(h^{-(1-\varepsilon)})$。为克服这种发散性,我们提出了一种频谱过滤策略来恢复均匀可观察性。理论分析和数值实验表明,高阶方法可能通过保留更大的真实物理频率带来促进这种恢复,从而减少过滤成本和观测时间。

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AI中文摘要

本文研究了一维波动方程的完全离散近似中$P^k$(局部)间断Galerkin方法的谱结构、数值色散和可观察性。通过分析耦合的时空数值色散,揭示了一种捕获机制,迫使物理和虚假模式的群速度在选定频率下消失。我们在此机制下建立了可观测性常数的指数爆炸$\exp(h^{-(1-\varepsilon)})$。为克服这种发散性,我们提出了一种频谱过滤策略来恢复均匀可观察性。理论分析和数值实验表明,高阶方法可能通过保留更大的真实物理频率带来促进这种恢复,从而减少过滤成本和观测时间。

英文摘要

This paper investigates the spectral structure, numerical dispersion, and observability of fully discrete approximations of the one-dimensional wave equation by $P^k$ (local) discontinuous Galerkin methods. Characterizing the coupled space-time numerical dispersion reveals a trapping mechanism that forces the group velocities of both physical and spurious modes to vanish at selected frequencies. We then establish an exponential blow-up of order $\exp(h^{-(1-\varepsilon)})$ for the observability constant under this trapping mechanism. To overcome this divergence for arbitrary $k$, we propose a spectral filtering strategy to restore uniform observability. Theoretical analysis and numerical experiments indicate that higher-order methods may facilitate this recovery by preserving a larger genuine physical frequency band, thereby reducing filtering cost and observation time.

2605.17392 2026-05-21 cs.SE

One Step Further: Understanding PLC Binaries Through Cross-Platform Reverse Engineering and Function-Level Semantic Analysis

更进一步:通过跨平台反向工程和函数级语义分析理解PLC二进制

Ang Jia, Yaxin Duan, He Jiang, Zhenzhou Tian, Zhilei Ren, Xiaochen Li

AI总结 本文提出PLC-BinX,一种用于跨平台PLC二进制理解的二进制代码分析工作流,通过跨平台反向工程、核心函数提取和函数级语义表示构建,实现了对PLC二进制的深入理解,并在工具链预测和功能预测任务中取得了优异的性能。

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AI中文摘要

随着新兴攻击越来越多地针对工业控制系统(ICS),可编程逻辑控制器(PLC)的安全性已成为关键问题。二进制代码分析(BCA)使分析人员能够在没有源代码的情况下理解编译程序,对于ICS安全任务如攻击后数字取证和事件响应至关重要。然而,由于三个关键问题,自动分析PLC二进制仍然具有挑战性:不同PLC平台的二进制格式异构性、由控制逻辑与运行时代码混合导致的纠缠程序语义,以及对可解释和基于学习的下游分析有限的语义表示。在本文中,我们提出了PLC-BinX,一种用于跨平台PLC二进制理解的BCA工作流。PLC-BinX分析来自四个平台的PLC二进制:CODESYS v3、GEB、OpenPLC v2和OpenPLC v3,并通过跨平台反向工程、核心函数提取和函数级语义表示构建来恢复函数级信息。基于恢复的语义表示,我们进一步研究了两个下游任务:工具链预测和功能预测。在十折程序级评估下,PLC-BinX在工具链预测中实现了100.00%的精确率、召回率和F1分数,在功能预测中对22个标签实现了51.43%的精确率、49.38%的召回率和49.18%的F1分数。结果表明,PLC-BinX通过从异构PLC二进制中暴露任务相关的函数级语义,提供了一种有效且可解释的跨平台PLC二进制理解方法。

英文摘要

As emerging attacks increasingly target Industrial Control Systems (ICS), the security of Programmable Logic Controllers (PLCs) has become a critical concern. Binary Code Analysis (BCA), which enables analysts to understand compiled programs without source code, is essential for ICS security tasks such as post-attack digital forensics and incident response. However, automated BCA for PLC binaries remains challenging due to three key issues: heterogeneous binary formats across PLC platforms, entangled program semantics caused by the mixture of control logic with runtime code, and limited semantic representations for interpretable and learning-based downstream analysis. In this paper, we present PLC-BinX, a BCA workflow for cross-platform PLC binary understanding. PLC-BinX analyzes PLC binaries from four platforms: CODESYS v3, GEB, OpenPLC v2, and OpenPLC v3, and recovers function-level information through cross-platform reverse engineering, core-function extraction, and function-level semantic representation construction. Based on the recovered semantic representations, we further study two downstream tasks: toolchain prediction and functionality prediction. Under ten-fold program-level evaluation, PLC-BinX achieves 100.00% precision, recall, and F1 in toolchain prediction, and 51.43% precision, 49.38% recall, and 49.18% F1 in functionality prediction over 22 labels. The results demonstrate that PLC-BinX provides an effective and interpretable approach to cross-platform PLC binary understanding by exposing task-relevant function-level semantics from heterogeneous PLC binaries.

2605.17384 2026-05-21 math.OC

Retractions by Alternating Projections

通过交替投影进行重新连接

Shixiang Chen, Yixiao He, Wen Huang

AI总结 本文提出了一种统一的框架,用于在光滑流形的交集上处理各种交替投影方法,展示了在清洁交集条件下,交替映射可以作为重新连接,并在不同光滑性条件下提供一阶或二阶重新连接工具。

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AI中文摘要

交替投影及其变体是计算集合交集点的经典工具。现有对光滑流形的分析主要集中在局部收敛速率下横截性或相关正则性条件。在本文中,我们开发了一个统一的框架,用于广泛类别的(可能不精确的)交替投影型方法在光滑流形交集上。具体来说,在假设两个嵌入的$C^{2,1}$子流形$\mathcal{M}_1, \mathcal{M}_2 \subset \mathbb{R}^n$清洁相交的条件下,我们证明了相应的交替映射在交集流形$\mathcal{M}=\mathcal{M}_1\cap \mathcal{M}_2$上具有良好的局部极限映射$ψ$,并且$ψ$是$\mathcal{M}$上的重新连接。此外,如果$\mathcal{M}_1$和$\mathcal{M}_2$是$C^{3,1}$,则$ψ$是二阶重新连接。进一步,标准的牛顿SLRA方案在横截性下表现出二次局部行为,可以被理解为在$\M$上诱导一个二阶重新连接。因此,该框架为约束在交集流形上的优化问题提供了新的基于重新连接的优化工具。

英文摘要

Alternating projections and their variants are classical tools for computing points in intersections of sets. Existing analyses for smooth manifolds mainly focus on local convergence rates under transversality or related regularity conditions. In this work, we develop a unified framework for a broad class of (possibly inexact) alternating-projection-type methods on intersections of smooth manifolds. Specifically, under the assumption that two $C^{2,1}$ embedded submanifolds $\mathcal{M}_1, \mathcal{M}_2 \subset \mathbb{R}^n$ intersect cleanly, we show that the associated alternating mapping admits a well-defined local limiting map $ψ$ on the intersection manifold $\mathcal{M}=\mathcal{M}_1\cap \mathcal{M}_2$, and that $ψ$ is a retraction on $\mathcal{M}$. If, in addition, $\mathcal{M}_1$ and $\mathcal{M}_2$ are $C^{3,1}$, then $ψ$ is a second-order retraction. Furthermore, the standard NewtonSLRA scheme, which exhibits quadratic local behavior under transversality, can be understood as inducing a second-order retraction on \(\M\). This framework thus provides new retraction-based optimization tools for problems constrained to the intersection manifold.

2605.17233 2026-05-21 math.AP math.DG

Geometric uncertainty principles for Schrödinger evolutions on negatively curved manifolds

Schrödinger演化的几何不确定性原理在负曲率流形上

Changxing Miao, Yilin Song, Ruihan Zhou

AI总结 本文研究了在特定Cartan-Hadamard流形上,配备渐近双曲度量的Schrödinger方程的不确定性原理,展示了在双曲几何中,尽管缺乏平移不变性和傅里叶表示,仍然存在类似的刚性现象,通过新的Carleman估计和对数凸性,揭示了曲率在散射方程定量唯一性性质中的作用。

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AI中文摘要

在本文中,我们研究了在特定Cartan-Hadamard流形上,配备渐近双曲度量的Schrödinger方程的不确定性原理。经典的Hardy不确定性原理在欧几里得空间中,如Escauriaza-Kenig-Ponce-Vega (JEMS, 2008; Duke Math. J., 2010) 所发展,揭示了Schrödinger方程解u的刚性现象:在两个不同时间具有足够强的高斯衰减性会导致u≡0。在本文中,我们展示了在双曲几何中这种刚性现象的持续存在,尽管缺乏平移不变性和傅里叶表示。我们的方法遵循Escauriaza-Kenig-Ponce-Vega的一般策略,其中底层几何带来本质的变化。这使我们能够建立新的Carleman估计和对数凸性。与欧几里得环境不同,双曲几何表现出指数体积增长和非平凡测地线逃逸至无穷远,这从根本上改变了Schrödinger演化的传播机制。基于新建立的virial恒等式和近似论证,我们推导出对数凸性。证明对数凸性的主要困难是通用流形上缺乏卷积结构。通过利用指数映射和Jacobi场,我们定义了新的平滑器。同时,为了建立适应于双曲空间的Carleman估计,我们引入了适应于曲面的新的权重函数。我们的结果突显了曲率在塑造散射方程定量唯一性性质中的作用。

英文摘要

In this paper, we study the uncertainty principle for Schrödinger equations with a bounded time-independent potentials on certain Cartan-Hadamard manifolds endowed with an asymptotic hyperbolic metric in dimensions $n\geq2$. The classical Hardy uncertainty principle in Euclidean space, as developed in the works of Escauriaza-Kenig-Ponce-Vega (JEMS, 2008; Duke Math. J., 2010), reveals a rigidity phenomenon for solution $u$ to Schrödinger equations: sufficiently strong Gaussian decay at two distinct times yields $u\equiv0$. In this work, we show that a similar rigidity persists in the setting of hyperbolic geometry, despite the absence of translation invariance and Fourier representation. Our approach follows a general strategy of Escauriaza-Kenig-Ponce-Vega, where the underlying geometry brings an essential change. This enables us to establish new Carleman estimates and logarithmic convexity. Unlike the Euclidean setting, the hyperbolic geometry exhibits exponential volume growth and nontrivial geodesic escape at infinity, which fundamentally alters the propagation mechanism of Schrödinger evolutions. Based on the newly-built virial identities and an approximation argument, we derive the logarithmic convexity. The main difficulty in proving the logarithmic convexity is the lack of convolution structure on general manifolds. By making use of the exponential map and Jacobi field, we define a new mollifier on curved geometry. Meanwhile, to establish the Carleman estimate adapted to hyperbolic space, we introduce a new weight function adapted to the curved manifold. Our results highlight the role of curvature in shaping quantitative uniqueness properties for dispersive equations.

2605.17136 2026-05-21 cs.GT math.CO math.PR

Classification aggregation: a quantitative impossibility theorem

分类聚合:一个量化不可能定理

Yuval Filmus

AI总结 本文研究了在概率1-ε下保证分类结果满射的聚合机制,证明了即使聚合函数远离常数,仍存在不可能性定理,并扩展到等价关系聚合的情况。

Comments 24 pages

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AI中文摘要

一组个体希望将m个对象分类为n个类别,使得每个类别都不为空(称为满射)。个体的意见通过依赖于对象的聚合函数分别聚合。Maniquet和Mongin证明,如果聚合函数是多数同意且结果必须始终满射,则聚合机制是独裁的。Cailloux等人证明,即使将多数同意放松为公民主权(每个对象可以分配到任何类别),同样成立。本文证明,即使仅要求结果在概率1-ε下满射(相对于任意对称i.i.d.分布),只要聚合函数远离常数,相似结果仍成立。在过程中,我们characterized所有无需对聚合函数做任何假设的聚合机制,其结果始终满射。我们的方法使用了Alekseev和Filmus的一般结果,具有更广泛的应用性。我们通过证明一个类似的不可能性结果来展示这一点,该结果适用于聚合等价关系。

英文摘要

A group of individuals wishes to classify $m$ objects into $n$ categories in such a way that no class is left empty, a condition known as surjectivity. The opinions of the individuals are aggregated separately for each object using an aggregation function that can depend on the object. Maniquet and Mongin showed that if the aggregation functions are unanimous and the outcome must always be surjective, then the aggregation mechanism is dictatorial. Cailloux et al. showed that the same holds even if unanimity is relaxed to citizen sovereignty (each object can be classified into any category). We show that similar results hold even if we only require the outcome to be surjective with probability $1-ε$ (with respect to an arbitrary symmetric i.i.d. distribution), provided that the aggregation functions are far from being constant. On the way, we characterize all aggregation mechanisms whose outcome is always surjective without any assumptions on the aggregation functions. Our approach uses a general result of Alekseev and Filmus which has wider applicability. We illustrate this by proving a similar impossibility result for aggregating equivalence relations.

2605.16994 2026-05-21 astro-ph.GA astro-ph.CO

Determination of the best dark matter profile for the Milky Way with Gaia DR3 using Bayesian Model Comparison

利用Gaia DR3数据确定银河系最佳暗物质分布

Aryan Singh, Shantanu Desai

AI总结 通过贝叶斯模型比较分析,利用Gaia DR3数据确定描述银河系旋转曲线的最佳暗物质模型,比较了三种不同的恒星模型和七种不同的暗物质模型,发现Einasto分布比NFW分布更受青睐,且核心暗物质分布优于NFW分布,同时发现MOND模型拟合效果不如暗物质模型。

Comments 42 pages, 39 figures. Accepted for publication in Astrophysics and Space Science

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AI中文摘要

我们通过贝叶斯模型比较分析,利用Gaia数据确定描述银河系旋转曲线的最佳暗物质模型。我们使用四个最近的旋转曲线速度编译数据,结合三种不同的恒星模型和七种不同的暗物质模型进行比较。在所采用的建模框架和基于Gaia的旋转曲线数据集下,我们发现Einasto分布在大多数数据集和恒星模型组合中比NFW分布更受青睐。我们还发现核心暗物质分布优于(尖峰的)NFW分布。我们还使用三种不同的插值函数测试MOND,并发现,在所考虑的实现中,MOND模型的拟合效果不如首选的暗物质模型。最后,在考虑的不同恒星模型中,没有一种模型明显优于其他模型。

英文摘要

We carry out a Bayesian model comparison analysis to determine the dark matter model that best describes the Milky Way rotation curve, using four recent compilations of rotation-curve velocities with the Gaia data. We compare these data using three different baryonic models along with seven different dark matter models. Within the adopted modeling framework and Gaia-based rotation curve datasets, we find that the Einasto profile provides the preferred phenomenological fit compared to the NFW profile} across most combinations of datasets and baryonic models. We also find that the cored dark profiles are preferred over the (cuspy) NFW profile. We also test MOND using three different interpolating functions and find that, within the implementations considered, the models provide poorer fits than the preferred dark matter profiles. Finally, among the different baryonic models considered, none is decisively favored over the others.

2605.16917 2026-05-21 astro-ph.GA

The Rapid ASKAP Continuum Survey VII: Spectra and Polarisation In Cutouts of Extragalactic Sources (SPICE-RACS) Second Data Release -- Unveiling the Magnetised Sky

SPICE-RACS 第二数据发布:揭示磁化天空

Alec J. M. Thomson, Timothy J. Galvin, Stefan W. Duchesne, Emil Lenc, George Heald, Ondrej Hlinka, Sunil Malik, Craig S. Anderson, Erik Osinga, Lerato Baidoo, N. M. McClure-Griffiths, Sebastian Hutschenreuter, Shane P. O'Sullivan, Takuya Akahori, B. M. Gaensler, J. P. Leahy, Y. K. Ma, Vanessa A. Moss, L. Rudnick, C. L. Van Eck, J. L. West

AI总结 该研究基于SPICE-RACS第二数据发布,揭示了 extragalactic 源的光谱和极化特性,通过大规模极化测量数据,提供了迄今为止最大的单个RM目录,为RM科学的发展奠定了基础。

Comments Accepted for publication in PASA. 37 pages, 25 figures, 7 tables

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AI中文摘要

我们介绍了从RACS(射电快速ASKAP连续光谱调查)第三低频时期(RACS-low3)导出的SPICE-RACS第二数据发布(DR2)。SPICE-RACS DR2覆盖了从南天极到赤纬+49度的整个天空,约覆盖了 celestial sphere 的87.5%。我们为约400万个射电源生成了Stokes I、Q、U的'cutout'光谱立方体,并提取了500万个射电组件的光谱。在我们观测的799.5-1087.5 MHz频段内,我们发现rms噪声约为200μJy/PSF,角分辨率约为15'',残余的宽场仪器极化约为0.1%。去重后,我们的极化目录包含检测到2.5×10^5(3.4×10^5)个法拉第旋转测量(RM)对于线性极化信号高于8σ(6σ)的组件。这使SPICE-RACS DR2成为迄今为止最大的单个RM目录,其目录中的RM数量是之前所有RM目录总和的5倍。我们的RM网格的面积密度为6.7±1.8_{-1.7} deg^{-2},提供了有效的'分辨率'约为23',并在天空上揭示了显著特征。宽频带RM的中位数不确定性约为2 rad m^{-2},并包括时间域的复杂度指标和信息。SPICE-RACS DR2数据集的广度和质量将使RM科学进入新阶段。此外,SPICE-RACS将为未来的深极化调查如ASKAP POSSUM调查提供理想的参考。我们所有的数据产品都可在CSIRO数据访问门户(DAP)和CSIRO ASKAP科学数据档案(CASDA)上公开获取。

英文摘要

We present the second data release (DR2) of Spectra and Polarisation in Cutouts of Extragalactic sources from RACS (SPICE-RACS). SPICE-RACS DR2 is derived from the third low-band epoch of the Rapid ASKAP Continuum Survey (RACS-low3) and covers the entire sky from the South celestial pole up to a declination of $+49^\circ$; approximately 87.5% of the celestial sphere. We produce 'cutout' spectral cubes in Stokes $I$, $Q$, $U$ around 4 million radio sources and extract spectra towards 5 million radio components. Across our observed band of 799.5--1087.5 MHz we find an $rms$ noise of $\sim200μ\mathrm{Jy/PSF}$, an angular resolution of $\sim15''$, and residual wide-field instrumental polarisation on the order of 0.1%. After de-duplication, our polarisation catalogue contains the detection of $2.5\times10^5$ ($3.4\times10^5$) Faraday rotation measures (RM) for components with a linearly polarised signal above $8σ$ ($6σ$). This places SPICE-RACS DR2 as the largest single RM catalogue ever produced by nearly an order of magnitude; the number of RMs in our catalogue alone is $\sim5$ times larger than every previous RM catalogue combined. Our resulting RM grid has an areal density of $6.7^{+1.8}_{-1.7}\mathrm{deg}^{-2}$, providing an effective 'resolution' of $\sim23'$, and reveals striking features across the sky. The broad-band RMs have a median uncertainty of $\sim2\ \mathrm{rad\ m}^{-2}$, and include complexity metrics and information from the time domain. The breadth and quality of the SPICE-RACS DR2 dataset will enable a new generation of RM science. Further, SPICE-RACS will provide an ideal reference for forthcoming deep polarisation surveys such as the ASKAP POSSUM survey. All of our data products are publicly available on the CSIRO Data Access Portal (DAP) and the CSIRO ASKAP Science Data Archive (CASDA).