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EESS电气与系统 104
2605.08075 2026-05-11 cs.LG eess.AS

Zero-Shot Imagined Speech Decoding via Imagined-to-Listened MEG Mapping

Maryam Maghsoudi, Shihab Shamma

AI总结 本文研究如何从非侵入式脑电记录中解码想象的言语,针对想象数据稀缺且难以跨被试对齐的问题,提出了一种利用听觉记录进行解码的新方法。研究者通过收集受过训练的音乐家在听觉和想象条件下的MEG数据,构建了一个三阶段解码流程,将想象的神经响应映射到听觉响应,并利用听觉数据训练词解码器,最终实现了对想象言语的显著高于随机水平的解码。该方法验证了想象言语解码的可行性,并展示了其在脑机接口应用中的潜力。

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英文摘要

Decoding imagined speech from non-invasive brain recordings is challenging because imagined datasets are scarce and difficult to align temporally across subjects and sessions In this work, we propose a new approach to the decoding of imagined speech that leverages the richer and more reliably labeled recordings during listening to speech. We collected paired listened and imagined MEG recordings to rhythmic melodic and spoken stimuli from trained musicians. Using trained musicians helped improve temporal alignment across conditions. We then developed a three-stage decoding pipeline that revealed consistent and meaningful relationships between neural activity evoked by imagining and listening to the same stimuli. First, we trained six linear and neural models to map imagined MEG responses to listened responses. We evaluated these models against a null baseline from unseen subjects to validate that the predicted-listening responses preserve stimulus-specific information. In the second stage, we trained a contrastive word decoder exclusively on the listened MEG responses, and evaluated it using four embedding strategies including semantic, acoustic, and phonetic representations. In the third stage, we process the imagined MEG responses from held-out subjects through the mapping pipeline to compute the corresponding listening responses that are then decoded by the listened decoder. Using rank-based analysis, we show that the imagined words are decodable significantly above chance. We shall report here the results of a proof-of-concept implementation to decode imagined speech, where all evaluations are performed on held-out subjects. We also demonstrate that performance improves with training data size, suggesting that this approach is scalable and can directly be made applicable to realistic brain-computer interface scenarios.

2605.08039 2026-05-11 eess.SP

Joint Beamforming and Antenna Placement Optimization in Pinching Antenna Systems with User Mobility: A Deep Reinforcement Learning Approach

Ali Amhaz, Mohamed Elhattab, Chadi Assi, Sanaa Sharafeddine

AI总结 本文研究了在用户移动场景下的夹持天线系统(PASS)中联合波束成形与天线位置优化的问题。针对传统方法难以处理用户移动带来的非凸性和环境不确定性,作者提出采用深度确定性策略梯度(DDPG)算法,在强化学习框架下实现对波束成形向量和夹持点位置的实时联合优化。该方法有效提升了系统在动态环境中的平均传输速率,并通过仿真验证了其性能优势。

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英文摘要

Recently, the pinching antenna systems (PASS) have attracted significant attention due to their ability to exploit dynamically reconfigurable pinching points along waveguides for flexible signal transmission. However, existing work largely overlooks user mobility although the optimal pinching configuration is highly dependent on the user's location and must be continuously adjusted. In this work, we investigate a PASS-enabled system model in which a base station (BS) serves a mobile user. We formulate an optimization problem that aims to maximize the user's average sum rate over a predefined time horizon while satisfying quality-of-service (QoS) constraint. This objective is achieved by jointly optimizing the beamforming vector at the BS and the pinching locations along the waveguides. Nevertheless, the resulting problem is highly non-convex and challenging to solve using conventional optimization techniques due to the intricate coupling among variables. The difficulty is further exacerbated by environmental randomness arising from user mobility and a probabilistic blockage model. This reveals a key engineering challenge: the performance gains of PASS critically rely on the ability to track or predict user trajectories in real time. To address these challenges, we adopt a deep deterministic policy gradient (DDPG) approach within a reinforcement learning framework, which is well-suited for continuous state and action spaces. Finally, extensive simulations are conducted to validate the proposed approach and demonstrate the importance of real-time configurability.

2605.08035 2026-05-11 eess.SP cs.LG

PropSplat: Map-Free RF Field Reconstruction via 3D Gaussian Propagation Splatting

William Bjorndahl, Maninder Pal Singh, Farhad Nouri, Joseph Camp

AI总结 PropSplat 是一种无需地图的无线传播建模方法,通过3D各向异性高斯原语重建射频场,能够从稀疏的射频测量数据中学习传播环境。该方法利用可学习的路径损耗指数对高斯进行初始化和优化,无需依赖平面图、地形数据库等外部信息。实验表明,PropSplat 在室内外场景中均优于现有方法,实现了更精确的信号强度预测和定位性能,展示了从稀疏测量数据中实现高精度传播建模的可行性。

Comments Accepted for presentation at IEEE DySPAN 2026

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英文摘要

Building a site-specific propagation model typically requires either ray-tracing over detailed 3D maps or dense measurement campaigns. Both approaches are expensive and often infeasible for rapid deployments where geographic data is unavailable or outdated. We present PropSplat, a map-free propagation modeling method that reconstructs radio frequency (RF) fields using 3D anisotropic Gaussian primitives. Each Gaussian encodes a scalar path loss offset relative to an explicit baseline path loss model with a learnable path loss exponent. Gaussians are initialized along observed transmitter--receiver paths and optimized end-to-end to learn the propagation environment without external information like floor plans, terrain databases, or clutter data. We evaluate PropSplat against wireless radiance field methods NeRF$^2$, GSRF, and WRF-GS+ on two real-world datasets. On large-scale outdoor drive-tests spanning multiple topographical regions at six sub-6 GHz frequencies, PropSplat achieves 5.38 dB RMSE when training measurements are spaced 300m apart and outperforms WRF-GS+ (5.87 dB), GSRF (7.46 dB), and NeRF$^2$ (14.76 dB). On indoor Bluetooth Low Energy measurements, PropSplat achieves 0.19m mean localization error, an order of magnitude better than NeRF$^2$ (1.84m), while achieving near-identical received signal strength prediction accuracy. These results show that accurate site-specific propagation reconstruction is achievable from sparse RF-native measurements. The need for geographic data as a prerequisite for scalable RF environment modeling is reduced.

2605.08028 2026-05-11 cs.LG cs.SY eess.SY

Adaptive Domain Decomposition Physics-Informed Neural Networks for Traffic State Estimation with Sparse Sensor Data

Eunhan Ka, Ludovic Leclercq, Satish V. Ukkusuri

AI总结 本文提出了一种自适应区域分解物理信息神经网络(ADD-PINN),用于解决基于稀疏固定传感器的交通状态估计问题。该方法通过两阶段残差引导框架,在离线速度场重建中有效缓解了传统物理信息神经网络对LWR模型中激波的过度平滑问题。实验表明,ADD-PINN在多种传感器配置下均取得优于现有方法的估计精度,并且训练速度更快,验证了其在稀疏传感场景下的有效性与高效性。

Comments 56 pages, 5 figures, 12 tables. Submitted to Transportation Research Part C

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Traffic state estimation from sparse fixed sensors is challenging because physics-informed neural networks (PINNs) tend to over-smooth the shockwaves admitted by the Lighthill-Whitham-Richards (LWR) model. This study proposes Adaptive Domain Decomposition Physics-Informed Neural Networks (ADD-PINN), a two-stage residual-guided framework for LWR-based offline speed-field reconstruction. A coarse global PINN is first trained; its spatial residual profile is then used to place subdomain boundaries and initialize child subnetworks in a decomposition-enabled mode, while a data-driven shock indicator can retain a single-domain fallback when localized evidence of transition is weak. The primary offline I-24 MOTION evaluation spans five days, five sensor configurations, and ten seeds per configuration, yielding 1,500 runs in total. Against neural and physics-informed baselines, ADD-PINN attains the lowest relative L2 error in 18 of 25 configurations and in 14 of 15 sparse-sensing cases, while training 2.4 times faster than the extended PINN (XPINN) baseline. An ablation study supports spatial-only decomposition as an effective default for fixed-sensor traffic reconstruction in the evaluated settings. Supplementary Next Generation Simulation (NGSIM) experiments serve as a negative control: the shock indicator suppresses decomposition in all 50 runs, and the default single-domain fallback ranks first across all sensor configurations. These results support residual-guided spatial decomposition as an effective PINN-family design for offline reconstruction when sparse fixed sensing coincides with localized transition regions.

2605.08015 2026-05-11 eess.SY cs.SY

Entropic Value-at-Risk for Inter-Vehicle Collision in Platoons: Network- and Delay-Induced Bounds on Risk Due to Extreme Events

Vivek Pandey, Nader Motee

AI总结 本文研究了在随机扰动和时延动态影响下,车联网车队中车辆间碰撞风险的量化问题。作者提出了一种基于熵值风险价值(EVaR)的严格风险评估框架,用于衡量极端事件引起的碰撞风险,并分析了通信网络结构和时延对风险的约束影响。研究发现,网络代数连通性决定了最大EVaR,而拉普拉斯矩阵的最大特征值则影响网络结构带来的最小固有风险,为车联网车队的安全设计提供了理论依据和实践指导。

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Safe operation of connected vehicle platoons under stochastic disturbances and time-delayed dynamics requires accurate quantification of rare but dangerous events, such as inter-vehicle collisions. We propose a rigorous framework for quantifying the risk of inter-vehicle collisions in connected vehicle platoons subject to time-delayed stochastic dynamics. We adopt the \emph{entropic value-at-risk} (EVaR) as a conservative metric to capture \emph{risk due to extreme events}, highlighting its advantages over conventional Value-at-Risk (VaR) and Conditional Value-at-Risk (CVaR). By expressing the inter-vehicle distance covariance in terms of the Laplacian eigenvalues of the communication network, we derive \emph{network-and time-delay-induced bounds} on both the minimum inherent risk and the worst-case risk. Specifically, the algebraic connectivity dictates the maximum EVaR, while the largest Laplacian eigenvalue determines the minimum risk inherently induced by the network structure. Numerical simulations illustrate how network topology and time delay shape collision risk, offering actionable insights for the safe design of vehicle platoons operating under stochastic disturbances.

2605.07989 2026-05-11 eess.SY cs.SY

Allocation of Dynamic Operating Envelopes in Radial Distribution Networks

Wilhiam de Carvalho, Florin Capitanescu, Cyril Rasic, Jean-François Toubeau, François Vallée

AI总结 本文深入分析了动态运行包络(DOE)不同构成方面对配电网容量计算与分配的影响,揭示了潮流模型、约束类型及计算场景对DOE结果的显著影响。研究提出了一种新型DOE算法LACE,具有透明且可扩展的计算特性,适用于更大规模网络或与其他优化引擎协同工作。通过多种测试馈线的数值仿真,包括使用比利时真实数据的低压馈线,为配电系统运营商及相关研究者提供了重要的理论支持与实用工具。

Comments Conference paper

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This paper provides an in-depth analysis on how different aspects of the dynamic operating envelope (DOE) formulation impact the computation and allocation of network capacity. We show that the envelopes are significantly affected by the power flow model (non-linear or linear), binding network constraint (thermal or voltage) and by the calculation case (import or export envelope). We also propose a novel DOE algorithm (LACE) that presents transparent and scalable computation that is useful for larger networks or to act in tandem with other optimization engines. We run numerical simulations with different test feeders, including a realistic low-voltage feeder with real-world data from Belgium. This paper provides crucial insights and tools to distribution system operators (DSOs), stakeholders and academics alike to make sure DOE calculation achieves desirable and efficient outcome.

2605.07987 2026-05-11 eess.IV cs.CV

Uncertainty Quantification for Cardiac Shape Reconstruction with Deep Signed Distance Functions via MCMC methods

Jan Verhülsdonk, Thomas Grandits, Francisco Sahli Costabal, Thomas Beiert, Simone Pezzuto, Alexander Effland

AI总结 本文提出了一种基于深度符号距离函数(DeepSDF)和马尔可夫链蒙特卡洛(MCMC)方法的概率框架,用于实现具有不确定性感知的心脏形状重建。该方法通过神经网络隐式建模心脏几何结构,能够同时重建左心室和右心室的多表面形态,并在潜在空间中进行贝叶斯推断,以获得最大后验估计和不确定性采样重建结果。实验表明,该方法在公开心脏数据集上实现了高精度重建,并能提供校准良好的不确定性估计。

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Atlas-based approaches allow high-quality, patient-specific shape reconstructions of cardiac anatomy from sparse and/or noisy data such as point clouds. However, these methods are mainly prior-driven, so the impact of uncertainty can be large, limiting their clinical reliability. We propose a probabilistic framework for uncertainty-aware cardiac shape reconstruction that combines Deep Signed Distance Functions (DeepSDFs) with Markov Chain Monte Carlo (MCMC) sampling. Cardiac geometries are modeled implicitly as zero-level sets of a neural network conditioned on learned latent codes, enabling multi-surface reconstruction of the left and right ventricles. By interpreting the reconstruction loss as a log-likelihood, we perform Bayesian inference in the latent space to obtain both maximum a posteriori (MAP) and posterior-sampled reconstructions. Experiments on a public cardiac dataset show that our approach produces accurate reconstructions and well-calibrated uncertainty estimates.

2605.07801 2026-05-11 eess.SY cs.SY

Sampling-based Model Predictive Control Using Trust Regions

Markus Walker, Marcel Reith-Braun, Daniel Frisch, Uwe D. Hanebeck

AI总结 本文提出了一种基于信任区域的采样型模型预测控制(MPC)方法,通过引入Kullback-Leibler散度约束和可选的熵下界,替代传统方法中依赖启发式调整的超参数策略,从而更有效地优化提议分布。结合确定性局部累积分布采样,进一步提升了采样效率和收敛性能。实验表明,该方法在样本量少和迭代次数有限的情况下表现出更快的收敛速度和更高的效率。

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Sampling-based model predictive control (MPC) algorithms, such as model predictive path integral (MPPI), enable approximate, gradient-free solutions to optimal control problems by drawing samples from a proposal distribution, evaluating their trajectory costs, and updating the proposal parameters accordingly. However, these approaches typically rely on heuristics for adjusting hyperparameters, such as temperature or momentum, or manual tuning. We propose a trust region formulation for sampling-based MPC that constrains updates of the proposal distribution via a principled Kullback--Leibler (KL) divergence bound and, optionally, an entropy lower bound. This replaces heuristic hyperparameter adaptation with values that are optimal w.r.t. the underlying Lagrangian. We further improve sample efficiency and convergence by combining the trust region update with deterministic localized cumulative distribution (LCD)-based sampling. Experiments on two benchmark environments demonstrate that the proposed trust region update achieves faster convergence and better sample efficiency in low-sample and low-iteration regimes, especially when paired with deterministic LCD-based sampling.

2605.07768 2026-05-11 eess.SY cs.LG cs.SY

Interactive Trajectory Planning with Learning-based Distributionally Robust Model Predictive Control and Markov Systems

Erik Börve, Nikolce Murgovski, Morteza Haghir Chehreghani, Leo Laine

AI总结 本文研究了在周围智能体决策存在不确定性的情况下,如何进行交互式轨迹规划。作者提出了一种基于学习的分布鲁棒模型预测控制(DR-MPC)方法,结合PAC学习理论,以应对学习分布中的误差。该方法能够在样本数量变化时,在鲁棒MPC与理想SMPC之间进行有效插值,提升了轨迹规划的鲁棒性与适应性。

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We investigate interactive trajectory planning subject to uncertainty in the decisions of surrounding agents. To control the ego-agent, we aim to first learn the decision distribution and solve a Stochastic Model Predictive Control (SMPC) problem. To account for errors in the learned distribution, we show that it is possible to utilize Probably Approximately Correct (PAC) learning in combination with Distributionally Robust (DR) optimization to obtain a solution which accounts for the errors induced by the learning model. The results indicate that our PAC learning-based DR-MPC framework provides a method to interpolate between a robust MPC and an omnipotent SMPC, based on the available number of samples.

2605.07763 2026-05-11 cs.IT cs.SY eess.SY math.IT

Beam-Aware Radio Map Estimation With Physics-Consistent Parametric Modeling for Unknown Multiple Satellites

Xiucheng Wang, Nan Cheng, Zhisheng Yin, Conghao Zhou, Ruijin Sun

AI总结 本文研究了在未知多颗卫星环境下构建卫星无线电地图(RM)的问题,该问题因卫星集合未知、波束覆盖不可观测以及接收信号强度难以校准而极具挑战性。为此,作者提出了一种基于物理一致参数化建模的波束感知无线电地图估计框架,通过统一卫星识别与信号场重建,有效提升了地图估计的精度与鲁棒性。实验表明,该方法在不同信噪比和卫星数量条件下均表现出更高的空间相关性、更低的均方误差和更优的F1分数,为卫星网络中的干扰感知提供了可靠解决方案。

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Satellite networks with dense low Earth orbit (LEO) constellations rely on aggressive spectrum reuse, making co-channel interference a dominant and rapidly varying factor that limits link availability and complicates spectrum sharing and compliance. Satellite radio map (RM) construction is therefore essential for interference cognition, yet it is challenging because the active satellite set is unknown, beam footprints and pointing are not directly observable, and received signal strength (RSS) measurements are difficult to calibrate under coupled link budget variations and noise. These latent uncertainties yield a severely underdetermined inverse problem with strong signature coherence, where existing methods often trade detection recall for precision and still fail to recover a faithful continuous RSS field. This paper proposes a beam-aware RM estimation framework that unifies active satellite identification and RSS field reconstruction through physics-consistent parametric modeling. An interpretable structural prior links geometry and beam shaping to spatial RSS formation, and an adaptive model order selection strategy infers the number of active satellites from measurements by balancing fit and complexity. Extensive experiments across varying signal to noise ratio (SNR), total satellite count, and active satellite count demonstrate consistently higher RSS spatial correlation, lower root mean squared error (RMSE), and improved F1 score, validating the proposed approach for interference-aware satellite RM construction in satellite networks.

2605.07743 2026-05-11 eess.SY cs.SY

Efficient MILP-based Urban Network Traffic Control in Mixed Autonomy with Dynamic Saturation Rates

Muhammad Haris, Claudio Roncoli

AI总结 本文提出了一种基于混合整数线性规划(MILP)的高效城市网络交通控制策略,用于混合自动驾驶环境,其中包含联网自动驾驶车辆(CAVs)和人类驾驶车辆(HDVs)。该方法引入了动态队列响应饱和率,以反映自动驾驶车辆对交通流特性的影响,并通过扩展的多商品存储转发模型,结合优化路径规划和信号灯配时,实现了对交通流的精细化控制。为提高计算效率,将原非凸二次规划问题转化为一系列凸子问题,最终形成MILP模型,实验结果验证了该方法在实时交通优化中的有效性与鲁棒性。

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This paper introduces a novel control strategy to optimize urban network traffic in mixed autonomy settings, featuring Connected and Automated Vehicles (CAVs) alongside Human-Driven Vehicles (HDVs). Unlike previous control strategies, where the impact of driver behaviour of CAVs and HDVs is not explicitly considered, we propose a dynamic, queue-responsive saturation rate to account for autonomy-driven variations in traffic flow characteristics. The proposed method is based on an extended multi-commodity store-and-forward model to a mixed autonomy environment, integrating optimized routing for CAVs via infrastructure-linked connectivity, and signal timings at every signalized intersection. The problem is formulated as a Non-Convex Quadratic Program (NQP), which accounts for queue evolution, spillback, green time allocation, and CAVs routing. To enable computational efficiency for real-time applications, we transform the NQP into a sequence of convex subproblems, leveraging under- and over-estimators to reformulate it as a Mixed Integer Linear Program (MILP). Experimental results via microscopic simulations validate the efficiency and robustness of the proposed methodology. The results reflect that the proposed model outperforms the existing multi-commodity approach, thus demonstrating its potential for real-time traffic optimization in future urban mobility systems.

2605.07712 2026-05-11 eess.SY cs.SY

Cascade PID Control of an Inverted Pendulum on a Cart System: Simulation and Experimental Analysis

Khalid Mehrab, Md Zamiul Alam, Shadman Tahmid Haque

AI总结 本文研究了级联PID控制架构在小车倒立摆系统中的性能,通过仿真与实验进行了分析。研究中建立了非线性系统模型并搭建了物理原型,采用内环控制摆杆角度、外环控制小车位置的级联结构,实验结果验证了实时稳定性的可行性,但也揭示了仿真与实际中的差异,如控制器增益、暂态响应及抗干扰能力等方面的问题。研究还指出级联PID在抑制干扰和大范围位置指令下的局限性,并通过LQR内环控制对比展示了更好的抗干扰性能。

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This study investigates the performance of cascade PID control architecture applied to an inverted pendulum on a cart system through both simulation and experimental implementation. A nonlinear model of the system was developed using Simscape Multibody in Simulink, while a physical prototype was constructed using a DC motor-driven cart, pendulum, rotary encoder, ultrasonic sensor, and an Arduino. The cascade PID control structure consists of an inner loop regulating the pendulum angle and an outer loop controlling the cart position. Simulation results demonstrated effective stabilization of the pendulum and satisfactory position tracking under idealized conditions. Experimental results confirmed successful real-time stabilization but revealed notable differences from simulation, particularly in controller gains, transient behavior, and disturbance response due to sensor noise, unmodeled friction, and implementation constraints. The study also highlights the limitations of cascade PID control in disturbance rejection and large position commands, particularly under limited track length. A comparative analysis using an LQR-based inner loop demonstrated better disturbance rejection and reduced overshoot. The results provide practical insights into the applicability and limitations of cascade PID control of the inverted pendulum system.

2605.07704 2026-05-11 eess.SP

RFNoC-Based FPGA Offloading for Fully Programmable PHY Acceleration

A. Oguz Kislal, Osman Mert Yilmaz, Bengu Bilgic Keskin, Ibrahim Hokelek, Ali Gorcin

AI总结 本文提出了一种基于RFNoC的FPGA卸载框架,用于实现全可编程物理层加速,解决了6G通信中计算密集型信号处理和人工智能应用对硬件加速的需求。该方法将包括LDPC编译码、速率匹配、交织与解交织等关键物理层过程卸载到FPGA上,直接集成于OpenAirInterface软件中,实现了射频前端驱动与高速处理的协同。实验验证表明,该系统能够在中等FPGA资源消耗下实现约900 Mbps的实时传输速率。

Comments Accepted to VTC2026-Spring

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Hardware acceleration has emerged as a key research topic for supporting computationally intensive signal processing and artificial intelligence applications in 6G research and development studies. This paper presents an RF Network on Chip (RFNoC) based hardware acceleration framework that offloads key physical layer procedures to a field programmable gate array (FPGA). The proposed design accelerates procedures, including low density parity check codes (LDPC) encoding and decoding, rate matching and unmatching, interleaving and deinterleaving, scrambling and descrambling, and log likelihood ratio estimation. The accelerator is integrated directly into the OpenAirInterface radio access network software, enabling simultaneous use of the FPGA as driver of the radio front end and a high throughput accelerator. The proposed system is validated through real time experiments with a commercial smartphone successfully connecting to the network. The implementation results demonstrate that a throughput of about 900 Mbps is achiievable using a moderate FPGA resource utlization.

2605.07697 2026-05-11 eess.SP

A Novel Framework for the Characterization of Continuous Electromagnetic Manifolds

Kuranage Roche Rayan Ranasinghe, Miguel Rodrigo Castellanos, Giuseppe Thadeu Freitas de Abreu

AI总结 本文提出了一种统一的框架,用于表征任意多输入多输出(MIMO)系统几何结构下的连续电磁(EM)流形。该框架通过引入连续的馈电函数和二维平面贴片建模,克服了传统方法在近场建模精度、波束成形空间限制以及仅适用于线性阵列等根本性问题。实验验证表明,该方法在保持合理计算复杂度的同时,显著提升了线性和平面阵列的近场表征精度。

Comments Submitted to an IEEE conference

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A unified framework for the characterization of continuous electromagnetic (EM) manifolds for arbitrary multipleinput multiple-output (MIMO) system geometries is presented. The EM manifold refers to the set of all physically realizable radiated field vectors, parameterized by the array excitation, that encodes the full spatial structure of the antenna system including near-field phase variations, polarization, and mutual coupling. Building upon the discrete moment-matrix formulation, the proposed framework addresses three fundamental limitations simultaneously: (i) point-source near-field modeling errors in the radiation operator; (ii) confinement of the beamforming space to the $N$-dimensional subspace dictated by hardware port count; and (iii) restriction to linear (1D) array geometries. Each mesh element is modeled as a two-dimensional (2D) planar patch, whose spatially averaged Green's function is evaluated via Gauss-Legendre (GL) quadrature, yielding superior nearfield accuracy at negligible additional cost. A continuous feeding function $w(\mathbf{p})\in L^2(\mathcal{S}_\mathrm{T})$ is introduced as the infinite-dimensional limit of the $N$-port network, enabling optimization over a higher dimensional current subspace, decoupled from hardware constraints. Full-wave MATLAB Antenna Toolbox validation confirms near-field accuracy improvements over the state-of-the-art (SotA) baseline for both linear and planar array geometries, while maintaining reasonable computational complexity.

2605.07694 2026-05-11 eess.AS cs.AI cs.SD eess.SP

Dependence on Early and Late Reverberation of Single-Channel Speaker Distance Estimation

Michael Neri, Archontis Politis, Tuomas Virtanen

AI总结 本文研究了单通道说话人距离估计模型对房间脉冲响应中早期反射和晚期混响的依赖性。通过将模拟的RIR分解为四种变体,并在不同校准条件下进行评估,发现模型在未进行时间校准时主要依赖早期反射信息,而在时间校准条件下仅通过传播延迟即可实现较高精度的距离估计。研究还表明,早期能量越强、环境混响越弱,估计精度越高。

Comments Submitted to IWAENC 2026

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英文摘要

Single-channel speaker distance estimation has recently achieved centimeter-level accuracy in simulated environments, yet it remains unclear which components of the room impulse response (RIR) the model exploits and how performance depends on the recording conditions. In this work, we decompose simulated RIRs into four variants (full, direct-only, no-late, and no-early) using the mixing time estimated from the echo density function as the boundary between early reflections and late reverberation. We define four calibration scenarios, from fully calibrated (synchronised capture, known source level) to fully uncalibrated (arbitrary onset, unknown level), and evaluate all combinations on a matched dataset. Results show that without time calibration, mean absolute error (MAE) increases to $1.29$ m and the model extracts reverberation-based cues, with early reflections emerging as the most informative component. Further analysis against DRR, $C_{50}$, and $T_{60}$ confirms that estimation accuracy improves with stronger early energy and degrades in highly reverberant environments. When time calibration is available, the model achieves a MAE of $0.14$ m by extracting the propagation delay alone, regardless of the RIR content.

2605.07658 2026-05-11 eess.SY cs.SY

Spatiotemporal Trust Evaluation for Collaborator Selection via Customized GNN-Mamba

Botao Zhu, Xianbin Wang

AI总结 本文研究了如何在协作任务中有效选择可信的合作者,提出了一种基于定制化图神经网络与Mamba模型的时空信任评估方法。该方法结合历史协作中的空间信任关系与设备在特定任务下的资源能力评估,能够准确捕捉设备信任的短期波动与长期演化。实验表明,该模型在信任评估的准确性与稳定性方面优于现有方法。

Comments IEEE ICC 2026

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英文摘要

The successful completion of collaborative tasks relies on the effective selection of trustworthy collaborators. To accurately evaluate the trustworthiness of potential collaborators, it is necessary to combine insights from their past collaborations with assessments of their resource capabilities under specific task contexts. However, the coexistence of diverse trust perspectives, along with complex spatiotemporal dependencies among devices, makes accurate trust evaluation particularly challenging. To address these challenges, we propose a customized Graph Neural Network (GNN)-Mamba (GM) model for trust evaluation and collaborator selection. In this model, the GNN model performs spatial trust fusion by leveraging inter-device spatial dependencies extracted from historical collaborations, while the Mamba-based temporal model captures both short-term fluctuations and long-term evolution of device trust. In addition, task-specific resource trust is incorporated to reflect the practical capabilities of devices under varying task conditions. Experimental results demonstrate that the proposed GM model outperforms baseline approaches in terms of the accuracy and stability of trust evaluation.

2605.07657 2026-05-11 eess.SY cs.SY

Electric Axle and Wheel Module Driveline Concepts for Self-propelled Agricultural Machinery and Equipment Carriers

Timo Oksanen, Karl Th. Renius

AI总结 本文研究了用于自推进农业机械和设备运输车的电动驱动轴和轮模块概念,旨在提升底盘和悬挂系统设计的自由度并降低能量损耗。研究对比了轴模块和轮模块在负载、效率、转向性、可控性等方面的性能,指出轮模块在设计灵活性和冗余性方面具有优势,而轴模块则在成本和结构刚性方面更具优势。两种模块均集成了分布式控制和转向功能,只需车辆提供直流电源和通信接口即可实现协同工作。

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Journal ref
Technical University of Munich. 2026. ISBN 978-3-911430-15-9. https://mediatum.ub.tum.de/1854369
英文摘要

Direct electric drivelines without power-split open new design freedom for frame and suspension design, along with often lower energy losses. This paper focuses on self-propelled agricultural machinery (combine and forage harvest-ers, root crop harvesters), equipment carriers, propelled trailers and field robots. For a typical vehicle with four driven wheels, the electric motors can be packaged as two axle modules or four wheel modules, both defined herein as self-contained mechatronic units with integrated power electronics, distributed control intelligence and steering. Axle module and wheel module concepts are compared in detail against engineering requirements including loads, effi-ciency, steerability, controllability, braking, suspension, structural load support, asymmetric wheel loading and manu-facturing cost. The wheel module offers maximum design freedom, redundancy and controllability, while the axle module provides lower cost, structural rigidity, automatic load sharing through the differential and the ability to be used in existing vehicle structures. Both concepts are defined such that distributed control intelligence and steering are integral to each unit, requiring only a DC power bus and communication interface from the vehicle.

2605.07650 2026-05-11 cs.CV eess.IV

Breaking Spatial Uniformity: Prior-Guided Mamba with Radial Serialization for Lens Flare Removal

Zijia Fu, Yuanfei Huang, Lizhi Wang, Hua Huang

AI总结 该论文研究了如何去除图像中的镜头光晕问题,针对现有方法在空间均匀处理上的不足,提出了一种基于先验引导的Mamba框架DeflareMambav2。该方法引入了光晕先验网络估计光晕区域,并结合径向序列化策略实现非均匀处理,从而更有效地保留光源区域、去除光晕伪影并恢复背景细节。实验表明,该方法在保持图像质量的同时具有更少的参数量,取得了当前最优的性能。

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英文摘要

Lens flares, caused by complex optical aberrations, severely degrade image quality especially in nighttime photography. Although recent restoration methods have made remarkable progress, most still rely on spatially uniform processing. They are failing to handle the region-dependent restoration demands of flare scenes, where saturated light sources should be preserved, flare artifacts removed, and background details recovered. To address this challenge, we propose DeflareMambav2, a prior-guided Mamba framework for lens flare removal. Specifically, we introduce a Flare Prior Network (FPN) to estimate flare priors and guide adaptive restoration. Besides, a novel radial serialization strategy breaks spatially homogeneous processing by performing flare-aware targeted sampling, and better supports long-range modeling in State Space Models (SSMs). Based on these priors, the backbone adopts a dual-level adaptive scheme. It explicitly preserves light-source regions to avoid over-processing, and applies curriculum-based restoration to the remaining contaminated areas while calibrating restoration intensity at the pixel level. Extensive experiments demonstrate that DeflareMambav2 achieves state-of-the-art performance with reduced parameter burden. Code is available at https://github.com/BNU-ERC-ITEA/DeflareMambav2.

2605.07623 2026-05-11 eess.SP

AI-Empowered Low-Altitude Economy: Cooperative Sensing With Fixed Wireless Access

Jinya Zhang, Jiajia Guo, Xiangyi Li, Chao-Kai Wen, Shi Jin

AI总结 随着低空经济的快速发展,未经授权的无人机带来的安全问题日益突出,亟需有效的监测手段。本文提出一种基于固定无线接入(FWA)用户终端设备的协作感知方法,利用上行信道状态信息(CSI)进行无人机检测与定位。通过构建人工智能驱动的两阶段协作感知框架,结合神经网络特征提取与注意力机制融合,显著提升了检测精度与定位性能,实验表明其漏检率低至0.63%,定位误差为6.50米,满足3GPP标准要求。

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英文摘要

The rapid growth of the low-altitude economy has intensified safety concerns arising from unauthorized unmanned aerial vehicles (UAVs), positioning UAV supervision as a key use case in 3GPP. To precisely sense such UAVs with wide coverage and low cost, we leverage fixed wireless access (FWA) customer premises equipment (CPEs), static, densely deployed devices that serve as wireless cameras for the radio environment. We develop an artificial intelligence-empowered two-stage cooperative sensing pipeline that exploits uplink channel state information (CSI) from multiple base station-CPE pairs for UAV detection and localization. In cooperative detection, lightweight CSI features are first individually extracted by neural network, and then adaptively integrated through an attention-based scheme to declare UAV presence. The learned attention scores effectively identify the critical pairs during detection, while facilitating UAV-affected pair selection for subsequent localization. For cooperative localization, neural network initially generates individual estimates and extract CSI features from selected pairs. These estimates, together with features and pair indexes, are fused using a Transformer to produce a precise cooperative estimate. Simulations show that cooperative schemes significantly reduce the missed detection probability to 0.63% and realize a 95%-confidence positioning error of 6.50 m, satisfying 3GPP requirements and showing the potential of FWA-assisted cooperative sensing. Dataset and codes are available on GitHub.

2605.07589 2026-05-11 eess.SY cs.SY

Distributionally Robust Data-Driven Predictive Control for Stochastic LTI Systems

Mirhan Urkmez, Shahab Heshmati-Alamdari

AI总结 本文提出了一种针对具有未知动态和扰动分布的随机线性时不变系统的分布鲁棒数据驱动预测控制框架。该方法通过最小二乘法利用离线轨迹拟合子空间预测控制预测器,并以预测残差的经验分布作为未知扰动分布的代理,构建Wasserstein模糊集,进而最小化最坏情况下的期望成本并保证输出约束的概率满足。该方法可转化为等效的数据驱动形式,无需显式识别预测模型,并通过有限样本集中性结果提供了数据驱动的Wasserstein半径,确保在真实扰动分布下期望成本和输出约束得到有效保障。数值仿真验证了该框架在不同扰动条件和成本函数下的有效性。

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英文摘要

We propose a distributionally robust data-driven predictive control framework for stochastic linear time-invariant systems with unknown dynamics and disturbance distributions. We use an offline trajectory to fit the subspace predictive control (SPC) predictor via least squares and construct an empirical distribution of the prediction residuals as a proxy for the unknown disturbance distribution. We then center a Wasserstein ambiguity set around this estimate and minimize the worst-case expected cost while enforcing probabilistic output constraint satisfaction over all distributions in the set. The resulting problem admits a tractable reformulation with an equivalent direct data-driven form, eliminating the need for explicit predictor identification. Using finite-sample concentration results, we provide a data-driven Wasserstein radius such that, with high probability, the true expected cost is bounded above by the tractable objective and output constraints are satisfied with respect to the true disturbance distribution. Numerical simulations validate the framework against existing methods under various disturbance conditions and cost functions.

2605.07547 2026-05-11 cs.DC cs.NI cs.SY eess.SY

Deadline-Driven Hierarchical Agentic Resource Sharing for AI Services and RAN Functions in AI-RAN

Haiyuan Li, Yulei Wu, Dimitra Simeonidou

AI总结 本文研究了AI-RAN中AI服务与无线接入网络(RAN)功能在边缘计算平台上的计算资源共享问题,提出了一种分层智能代理框架(HAF),通过结合基于大语言模型的代理进行慢时间尺度的服务与功能部署,以及基于凸优化的快速时间尺度资源分配算法,有效协调了不同时间尺度的调度决策。该框架还引入了预测性评判模块,以减少因服务迁移带来的性能损失,实验表明HAF在服务等级目标(SLO)达成率方面优于现有方法,显著提升了AI服务请求的满足率。

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英文摘要

AI-RAN consolidates AI services and Radio Access Network (RAN) functions onto a unified, GPU-accelerated infrastructure at the network edge. However, compute sharing between real-time RAN functions and highly heterogeneous AI services requires coordination of scheduling decisions at mismatched timescales, and placement adaptation may require service migration across nodes with non-negligible interruptions. This paper proposes a hierarchical agentic framework (HAF) for compute sharing in AI-RAN that combines a large language model (LLM)-based agent for slow-timescale placement of AI services and RAN functions with a closed-form, deadline-aware convex algorithm for fast-timescale GPU/CPU allocation. The LLM agent is further equipped with a predictive critic that filters out migrations when the induced service interruption outweighs the expected service-level objective (SLO) benefit. Experimental results show that HAF reaches 90.0% overall SLO fulfillment, a 20.5% improvement over the strongest baseline, and raises AI service request fulfillment from 51% to 85.3%. Further evaluations show that HAF retains its advantage under diverse load conditions, while the critic consistently improves SLO fulfillment across multiple open-source LLM agents.

2605.07541 2026-05-11 eess.SY cs.SY

Learning Neural Hybrid Surrogates for Gradient-Based Falsification

Lasse Kötz, Knut Åkesson

AI总结 本文提出了一种基于神经网络的混合替代模型方法,用于解决具有模式依赖动态和离散切换的混合动态系统的形式化验证问题。该方法通过从数据中学习可微分的混合自动机模型,扩展了传统仅适用于连续动态的替代验证方法,能够同时学习隐含模式编码器和对应模式条件下的向量场。实验表明,该方法在多数基准规范上能够有效发现反例,并在样本效率方面优于其他工具。

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英文摘要

Falsification of hybrid dynamical systems remains challenging due to mode-dependent dynamics and discrete transitions. In this work, we propose a surrogate-based falsification approach that enables hybrid systems by learning a differentiable hybrid automaton model from data. This extends previous surrogate-based falsification methods, which were limited to purely continuous dynamics. Specifically, we employ neural hybrid automata to learn both a latent mode encoder and the corresponding mode-conditioned vector fields. Once the surrogate has paired each mode with an associated vector field, the transition guards are inferred using existing trajectory data. The learned surrogate is subsequently subjected to a gradient-based optimal control formulation, which minimizes a smooth approximation of the safety specification to find safety violations. In the last step, an experiment with the optimal control solution is carried out on the original system to ensure soundness. The proposed method consistently uncovers counterexamples on a majority of evaluated benchmark specifications; on these cases, it achieves competitive or improved sample efficiency than other tools while using a reduced simulation budget.

2605.07535 2026-05-11 cs.CR cs.SY eess.SY

Resilience of IEC 61850 Sampled Values-Based Protection Systems Under Coordinated False Data Injections

Denys Mishchenko, Irina Oleinikova, Laszlo Erdodi

AI总结 本文评估了基于IEC 61850采样值(SV)协议的数字化变电站在协同虚假数据注入攻击(FDIA)下的鲁棒性。研究通过实验分析了在变电站层级同时具备物理和网络访问权限的攻击场景,展示了攻击者如何协调操纵多个电气参数,实现隐蔽的多向量攻击,导致保护系统误动作或失效。实验结果揭示了SV保护机制在真实攻击条件下的关键脆弱性,并提出了一种涵盖威慑、预防、检测、缓解和恢复的防御策略,以及基于可信独立通道和数据交叉验证的增强防护方法。

Comments 11 pages, 8 figures

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英文摘要

This paper assesses the resilience of IEC 61850 digital substations under False Data Injection Attacks (FDIAs) targeting the Sampled Values (SV) protocol. The multicast nature of SV, while enabling time-critical automation, exposes substations to cyber intrusions capable of disrupting protection functions and causing large-scale outages. To evaluate these risks, coordinated attack vectors involving both physical and cyber access at the bay level are experimentally analyzed using an advanced setup based on industrial-grade intelligent electronic devices (IEDs). The proposed attacks simultaneously manipulate multiple electrical parameters in a coordinated and physically consistent manner. Experimental results confirm the feasibility of stealthy multi-vector FDIAs that can trigger false protection actions, conceal real faults, or block protection mechanisms while maintaining realistic signal behavior. The Power Hardware-in-the-Loop (PHIL) testbed enables closed-loop evaluation under strict timing, communication, and protection logic constraints, reflecting real device behavior beyond simulation and controller-level HIL environments. The findings reveal critical vulnerabilities in SV-based protection schemes that directly affect grid reliability, particularly under realistic attacker positioning. To address these challenges, a defense strategy covering deterrence, prevention, detection, mitigation, and resilience is analyzed, with emphasis on bay-level infrastructure. Furthermore, a resilience-oriented method based on trusted independent channels and cross-verification of SV data within the protection logic is outlined as a complementary countermeasure for scenarios where existing standardized security mechanisms are insufficient.

2605.06045 2026-05-11 eess.SY cs.SY

Kirigami-Structured Electronic Capsule for Long-Term Continuous Gastric Monitoring

Hen-Wei Huang, Claas Ehmke, Dawei Wang, Blake Smith, Ziyao Zhou, Rong Tan, David Werder, Crystan McLymore, Niels Neidlein, Emanuele Falli, Ali Imani, James McRae, Yeseul Jeon, So-Yoon Yang, Wesley S. Culberson, James Byrne, Giovanni Traverso

AI总结 该研究提出了一种基于 kirigami 结构的可吞咽电子胶囊,用于实现胃部的长期连续监测。通过结合仿生电控释放机制与 kirigami 电子架构,该胶囊能够在胃内稳定驻留数周,并具备按需拆解功能,解决了传统可吞咽设备在运行时间、机械适应性和无线通信可靠性方面的不足。研究还展示了该系统在胃部辐射监测中的应用,为无创体内监测提供了新的解决方案。

Comments This submission is withdrawn because the author/contributor information in the current version was submitted before explicit confirmation had been obtained from all relevant team members. We are withdrawing the article to avoid an inaccurate or unverified authorship/contribution record

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英文摘要

Ingestible electronic systems enable non-invasive, in situ sensing within the gastrointestinal (GI) tract, yet clinical translation has been limited by uncontrolled transit, short operational lifetimes, and unreliable wireless communication that prevent continuous monitoring. Here, we present a gastric-resident ingestible robotic platform that achieves week-long operation through integration of a bioinspired, electrically triggered release mechanism with a kirigami-enabled electronic architecture. A kirigami-patterned flexible printed circuit board spans the capsule body and deployable superelastic arms, enabling high-density integration of sensing, power management, and wireless modules within a constrained volume while tolerating large mechanical deformation during gastric residence. Stable retention and on-demand disassembly are achieved using thermally responsive polycaprolactone joints that transition from rigid to compliant states under electrical activation, avoiding dependence on variable chemical triggers. Reliable telemetry in the highly attenuating gastric environment is maintained using a dual-band Bluetooth Low Energy and sub-gigahertz module with RSSI- and throughput-aware adaptive transmission, balancing link robustness and energy consumption. We demonstrate long-term, continuous monitoring of gastric radiation exposure, enabling early detection of dose accumulation and providing a promising in vivo alternative to wearable or handheld dosimeters. Swine studies confirm stable gastric residence, sustained real-time telemetry, and safe gastrointestinal passage following triggered disassembly. This work establishes kirigami-enabled integration as a scalable strategy for long-term gastric-resident robotic systems.

2605.05976 2026-05-11 eess.SY cs.SY

Community-to-Vehicle: Integrating Electric Vehicles into Energy Communities -- A Swiss Case Study

Na Li, Dong Liu, Stavros Orfanoudakis, Özge Okur, N. K. Panda, Pedro P. Vergara, Binod Koirala

AI总结 本文探讨了如何通过“社区到车辆”(C2V)机制将电动汽车充电整合进本地能源社区,以提高本地可再生能源的利用效率。研究基于瑞士的本地电力社区框架,设计了从完全分离到协调充电的过渡场景,评估了对电动汽车用户和社区的影响。结果表明,C2V机制显著提升了本地光伏的利用率,降低了充电成本,并为社区创造了额外收入,展示了其作为可行的制度设计在现有法规下推动社区与电动汽车协同发展的潜力。

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英文摘要

The institutional separation between local energy communities and public electric vehicle (EV) charging limits the efficient use of locally generated renewable energy. This paper introduces the concept of community-to-vehicle (C2V) as an institutional design mechanism to bridge this gap by enabling EV charging within the community boundary, where locally generated photovoltaic (PV) surplus is preferentially allocated and offered to external users at a community charging price. Building on the recently introduced local electricity community framework in Switzerland, we design scenarios that capture the transition from full separation to coordinated EV charging and evaluate their impacts on EV users and the community. The results show that C2V significantly improves local PV utilization and enhances economic performance, reducing EV charging costs relative to commercial alternatives while generating additional revenue streams for the community. These findings highlight the potential of C2V as a practical, implementable mechanism for integrating EV charging into local energy communities, providing a clear pathway for adopting coordinated community-EV interaction within existing regulatory frameworks.

2605.03811 2026-05-11 eess.SY cs.SY

A Directivity-Dependent Rician K-Factor Model for Indoor Industrial Channels

Dimitrios C. Tzarouchis

AI总结 本文提出了一种基于物理原理的闭合形式模型,用于描述室内工业环境中天线方向性与均方根时延扩展、平均过冲时延之间的关系。研究从瑞利K因子出发,揭示了K因子与总发射加接收天线增益之间的依赖关系,并通过一个表征散射各向异性的因子进行关联。该模型适用于任意散射功率时延分布,并通过75 GHz频段下的射线追踪仿真验证了其有效性,为宽带毫米波工业通信链路的天线设计提供了理论依据和实用规则。

Comments unresolved results issue/ re-framing required

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英文摘要

We derive a physics-based, closed-form model linking antenna directivity to the root-mean-square (RMS) delay spread and mean excess delay in large reverberant indoor environments. Starting from the Rician K-factor-the ratio of line-of-sight (LOS) to scattered power we show that K scales with the total transmit-plus-receive (Tx+Rx) antenna gain through a single reverberance factor that quantifies scatter anisotropy. For an arbitrary scatter power delay profile (PDP), we derive a general identity connecting sigma, tau, and K; the exponential scatter model is the physically motivated special case. Ray-tracing simulations over 100 random link placements in a 57300 m3 industrial hall at 75 GHz validate the model. Compact design rules map target delay-spread values to the minimum required antenna gain, enabling wideband mmWave industrial links.

2605.02204 2026-05-11 eess.SP

When Eavesdroppers Reason: Agentic Eavesdropping Attacks on Semantic Communication

Shunpu Tang, Qianqian Yang, Zhiguo Shi, Jiming Chen, Xuemin Shen

AI总结 语义通信(SemCom)作为下一代网络的有前景范式,其端到端的联合源信道编码架构也带来了严重的隐私泄露风险。为评估此类风险,本文提出了一种基于大语言模型的智能窃听攻击方法,通过三个功能代理构建闭环工作流,无需窃听信道状态信息即可高效恢复私有信息,并进一步优化重建结果,显著提升了窃听成功率,揭示了语义通信系统亟待解决的隐私安全隐患。

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英文摘要

Semantic communication (SemCom) has emerged as a promising paradigm for next-generation networks. However, its typical end-to-end joint source--channel coding (JSCC) architecture also raises serious privacy concerns. To guide future secure SemCom design, it is important to understand how serious such leakage can be. Nevertheless, existing eavesdropping attacks mainly rely on fixed-configuration solvers and often require instantaneous wiretap channel state information (CSI) to achieve effective privacy inference. This may lead future secure SemCom designs to overlook potentially severe risks. To address this, we propose a large language model (LLM)-orchestrated agentic eavesdropper. Specifically, the proposed eavesdropper forms a closed-loop workflow with three functional agents. The optimization agent adaptively performs joint semantic-and-channel inversion to recover private information from the intercepted signal without requiring wiretap CSI. The perception agent evaluates the effectiveness of the optimization agent and assesses whether the recovered private semantics are reasonable, providing feedback to the optimization agent. The refinement agent further analyzes the recovered content and uses a generative prior to refine promising candidates into more realistic and complete private reconstructions while preserving consistency with the intercepted signal. Simulation results over a MIMO Rayleigh fading channel show that the proposed eavesdropper achieves more than $75\%$ eavesdropping success rate at $\mathrm{SNR}\geq 5$~dB even without wiretap CSI, highlighting a severe privacy threat that future secure SemCom systems must address.

2604.06276 2026-05-11 eess.IV cs.CV

Structural Regularities of Cinema SDR-to-HDR Mapping in a Controlled Mastering Workflow: A Pixel-wise Case Study on ASC StEM2

Xin Zhang, Xiaoyi Chen

AI总结 本文基于ASC StEM2数据集,对电影从标准动态范围(SDR)到高动态范围(HDR)的映射关系进行了像素级的实证研究,分析了在受控制作流程中SDR与HDR版本在亮度和色彩结构上的规律性差异。研究发现,SDR与HDR版本在亮度上具有稳定的全局单调对应关系,而色彩上则表现出色调一致、饱和度分布调整等特点。通过EXR源数据作为参考,研究进一步构建了像素级决策图,区分了需恢复原场景信息的区域和需内容自适应调整的区域,为结构感知的SDR到HDR映射分析提供了可解释的定量基准。

Comments 15 pages, 6 figures. Empirical case study on cinema SDR-to-HDR mapping using ASC StEM2

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Journal ref
Advanced Motion Picture Technology, 2026, no. 3, pp. 14-22
英文摘要

We present an empirical case study of cinema SDR-to-HDR mapping using ASC StEM2, a rare common-source dataset containing EXR scene-referred images and matched SDR/HDR cinema release masters from the same ACES-based mastering workflow. Based on pixel-wise statistics over all 18,580 frames of the test film, we construct a three-domain comparison involving EXR source data, SDR release masters, and HDR release masters to characterize their luminance and color structural relationships within this controlled workflow. In the luminance dimension, SDR and HDR masters exhibit a highly stable global monotonic correspondence, with geometric structure remaining largely consistent overall; sparse and structured deviations appear in self-luminous highlights and specific material regions. In the color dimension, the two masters remain largely consistent in hue, with saturation exhibiting a redistribution pattern of shadow suppression, midtone expansion, and highlight convergence. Using EXR as a scene-referred anchor, we further define a pixel-level decision map that operationally separates EXR-closer recovery regions from content-adaptive adjustment regions. Under this operational definition, 82.4% of sampled image regions are classified as EXR-closer recovery, while the remainder require localized adaptive adjustment. Rather than claiming a universal law for all cinema mastering pipelines, the study provides an interpretable quantitative baseline for structure-aware SDR-to-HDR analysis and for designing learning-based models under shared-source mastering conditions.

2601.20688 2026-05-11 eess.SP

Grover's Search-Inspired Quantum Reinforcement Learning for Massive MIMO User Scheduling

Ruining Fan, Xingyu Huang, Mouli Chakraborty, Avishek Nag, Anshu Mukherjee

AI总结 本文提出了一种受格罗弗搜索启发的量子强化学习框架,用于解决大规模多输入多输出(mMIMO)系统中的用户调度问题。该方法通过将格罗弗搜索算法引入强化学习过程,有效探索了指数级增长的调度空间,并采用自设计的量子门电路实现模型,模拟了强化学习的分层架构。实验结果表明,该方法收敛性能良好,显著优于传统卷积神经网络和量子深度学习的基准方法。

详情
英文摘要

The efficient user scheduling policy in the massive Multiple Input Multiple Output (mMIMO) system remains a significant challenge in the field of 5G and Beyond 5G (B5G) due to its high computational complexity, scalability, and Channel State Information (CSI) overhead. This paper proposes a novel Grover's search-inspired Quantum Reinforcement Learning (QRL) framework for mMIMO user scheduling. The QRL agent can explore the exponentially large scheduling space effectively by applying Grover's search to the reinforcement learning process. The model is implemented using our designed quantum-gate-based circuit, which imitates the layered architecture of reinforcement learning, where quantum operations act as policy updates and decision-making units. Moreover, the simulation results demonstrate that the proposed method achieves proper convergence and significantly outperforms classical Convolutional Neural Networks (CNN) and Quantum Deep Learning (QDL) benchmarks.

2512.19408 2026-05-11 math.NA cs.CE cs.NA cs.RO cs.SY eess.SY math.DS

Mixed formulation and structure-preserving discretization of Cosserat rod dynamics in a port-Hamiltonian framework

Philipp L. Kinon, Simon R. Eugster, Peter Betsch

AI总结 本文提出了一种基于能量的非线性空间Cosserat杆动力学建模框架,适用于大位移和大旋转情况。该方法采用混合变量形式,独立处理位移、速度和应力变量,并通过引入方向量描述有限旋转,避免了奇点并保持质量矩阵恒定,最终形成一个具有二次能量泛函的无限维端口哈密顿系统。通过结构保持的有限元离散化,得到具有哈密顿结构的有限维系统,有利于设计能量-动量一致的积分方案,并自然地集成阻尼材料行为和非标准驱动方式,为计算力学中涉及有限旋转的问题提供了新的能量-动量一致建模方法。

Comments 39 pages, 16 figures

详情
英文摘要

An energy-based modeling framework for the nonlinear dynamics of spatial Cosserat rods undergoing large displacements and rotations is proposed. The mixed formulation features independent displacement, velocity and stress variables and is further objective and locking-free. Finite rotations are represented using a director formulation that avoids singularities and yields a constant mass matrix. This results in an infinite-dimensional nonlinear port-Hamiltonian (PH) system governed by partial differential-algebraic equations with a quadratic energy functional. Using a time-differentiated compliance form of the stress-strain relations allows for the imposition of kinematic constraints, such as inextensibility or shear-rigidity. A structure-preserving finite element discretization leads to a finite-dimensional system with PH structure, thus facilitating the design of an energy-momentum consistent integration scheme. Dissipative material behavior (via the generalized-Maxwell model) and non-standard actuation approaches (via pneumatic chambers or tendons) integrate naturally into the framework. As illustrated by selected numerical examples, the present framework establishes a new approach to energy-momentum consistent formulations in computational mechanics involving finite rotations.