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31st International Conference on Computational Linguistics, COLING 2025

作者： Ling, Zhenqing Xie, Yuexiang Dong, Chenhe Shen, Ying School of Intelligent Systems Engineering Sun Yat-sen University China Alibaba Group China Guangdong Provincial Key Laboratory of Fire Science and Intelligent Emergency Technology China

ISBN: (纸本)9798891761964

Despite significant progress in abstractive text summarization aimed at generating fluent and informative outputs, how to ensure the factual consistency of generated summaries remains a crucial and challenging issue. In this study, drawing inspiration from advancements in causal inference, we construct causal graphs to analyze the process of abstractive text summarization methods and identify intrinsic causes of factual inconsistency, specifically language bias and irrelevancy bias, and we propose COFACTSUM, a novel framework that mitigates the causal effects of these biases through counterfactual estimation for enhancing the factual consistency of the generated content. COFACTSUM provides two counterfactual estimation strategies, including Explicit Counterfactual Masking, which employs a dynamic masking approach, and Implicit Counterfactual Training, which utilizes a discriminative cross-attention mechanism. Besides, we propose a Debiasing Degree Adjustment mechanism to dynamically calibrate the level of debiasing at each decoding step. Extensive experiments conducted on two widely used summarization datasets demonstrate the effectiveness and advantages of the proposed COFACTSUM in enhancing the factual consistency of generated summaries, outperforming several baseline methods. © 2025 Association for Computational Linguistics.

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MATD3-Based End-Edge Collaborative Resource Optimization for NOMA-Assisted Industrial Wireless Networks

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Computers, Materials & Continua 2025年第2期82卷 3203-3222页

作者： Ru Hao Chi Xu Jing Liu College of Information Engineering Shenyang University of Chemical TechnologyShenyang110142China State Key Laboratory of Robotics Shenyang Institute of AutomationChinese Academy of SciencesShenyang110016China Key Laboratory of Networked Control Systems Chinese Academy of SciencesShenyang110016China

Non-orthogonal multiple access (NOMA) technology has recently been widely integrated into multi-access edge computing (MEC) to support task offloading in industrial wireless networks (IWNs) with limited radio resources. This paper minimizes the system overhead regarding task processing delay and energy consumption for the IWN with hybrid NOMA and orthogonal multiple access (OMA) schemes. Specifically, we formulate the system overhead minimization (SOM) problem by considering the limited computation and communication resources and NOMA efficiency. To solve the complex mixed-integer nonconvex problem, we combine the multi-agent twin delayed deep deterministic policy gradient (MATD3) and convex optimization, namely MATD3-CO, for iterative optimization. Specifically, we first decouple SOM into two sub-problems, i.e., joint sub-channel allocation and task offloading sub-problem, and computation resource allocation sub-problem. Then, we propose MATD3 to optimize the sub-channel allocation and task offloading ratio, and employ the convex optimization to allocate the computation resource with a closed-form expression derived by the Karush-Kuhn-Tucker (KKT) conditions. The solution is obtained by iteratively solving these two sub-problems. The experimental results indicate that the MATD3-CO scheme, when compared to the benchmark schemes, significantly decreases system overhead with respect to both delay and energy consumption.

关键词： Industrial wireless networks(IWNs) multi-access edge computing(MEC) non-orthogonal multiple access(NOMA) task offloading resource allocation

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Machine learning empowered UAV-based beamforming design in ISAC systems

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Science China(Information Sciences) 2025年第5期68卷 285-286页

作者： Xiangyang DUAN Xiaoqi ZHANG Shuqiang XIA Zhongbin WANG Yihua MA Weijie YUAN State Key Laboratory of Mobile Network and Mobile Multimedia Technology Wireless and Computing Research InstituteZTE Corporation School of Electrical and Data Engineering University of Technology Sydney School of Automation and Intelligent Manufacturing Southern University of Science and Technology

Integrated sensing and communication (ISAC) has been proposed as an enabling technology for the realization of the next-generation wireless system,which focuses on performing wireless communication and sensing *** the various potential ISAC-based applications,unmanned aerial vehicle (UAV)-based ISAC plays a significant part in unlocking the potential of future next-generation wireless communication,facilitating low-latency data transmission in high-mobility *** by recent advancements,a variety of effective techniques have been investigated to optimize beamforming design in ISAC *** instance,the authors in [1] introduced an extended Kalman filtering (EKF)-based method tailored for millimeter wave (mmWave) ISAC ***,Ref.[2]proposed an extended interacting multiple model (IMM)-EKF framework designed for vehicular networks with intricate roadway *** these advancements,the aforementioned methods typically employ a separate scheme for channel prediction and beam alignment,which introduces additional signaling overhead in real-world ***,there is a demand for an end-to-end beamforming design approach specifically for UAV-based ISAC systems.

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Nanosecond laser-induced surface damage growth and its mechanism of single crystal CaF2 (111) at 193 nm

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Optics Express 2025年第7期33卷 15067-15080页

作者： Shan, Chong Kou, Huamin Jiang, Dapeng Liu, Rongrong Zhang, Zhen Lu, Zhuowei Fang, Lizhi Han, Ping Lian, Yafei Peng, Xing Zhao, Yuanan Su, Liangbi State Key Laboratory of Functional Crystals and Devices Shanghai Institute of Ceramics Chinese Academy of Sciences Shanghai201899 China State Key Laboratory of High Field Laser Physics Shanghai Institute of Optics and Fine Mechanics Chinese Academy of Sciences Shanghai201800 China College of Intelligent Science and Technology National University of Defense Technology Hunan Changsha410073 China

The damage growth of calcium fluoride crystal (CaF2) induced by 193 nm laser irradiation poses a significant risk to the operation of deep-ultraviolet photolithography. It is crucial to explore the damage growth characteristics and mechanism of CaF2 crystal induced by a 193 nm laser for the safe operation of integrated photolithography systems. This paper analyzed the trend of 193 nm laser-induced damage growth of CaF2 crystal surfaces and obtained the damage growth coefficients and thresholds of three CaF2 crystal test samples. By analyzing the chemical composition variation and the electrical field modulation of initial damage, it was concluded that the laser-induced modification around initial damage and the electric field modulation at the center of initial damage would affect the damage growth properties. Meanwhile, the different absorption and growth thresholds of the same initial damage would also result in different damage growth characteristics. This research provides reliable information for improving CaF2 crystal's damage resistance ability and prolonging its lifetime in deep-ultraviolet lithography systems. © 2025 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement.

关键词： Fluorine compounds

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GPS flex power detection leveraging XGBoost machine learning based on LEO satellites

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GPS Solutions 2025年第3期29卷 1-15页

作者： Du, Yanjun Yang, Yuanxi Jia, Xiaolin Yao, Wanqiang Li, Qin College of Geomatics Xi’an University of Science and Technology Xi’an710054 China State Key Laboratory of Spatial Datum Xi’an710054 China Xi’an Research Institute of Surveying and Mapping Xi’an710054 China National Key Laboratory of Intelligent Geospatial Information Beijing100094 China

In recent years, the flex power of the global positioning system (GPS) Block IIR-M and Block IIF satellites has frequently been activated and deactivated. Ground-based GPS flex power monitoring faces several challenges, including uneven receiver distribution, multipath error arising from complex environments, and significant fluctuations in low-elevation carrier-to-noise ratio data. To overcome these challenges, we propose a novel GPS flex power detection method by introducing a detection metric, CN0el. Spaceborne receiver data from 15 low earth orbit (LEO) satellites and historical data from February 2022 to December 2023 are utilized to train an extreme gradient boosting (XGBoost) machine learning model. The detection model achieves an accuracy exceeding 99%, as validated by the measured data from January and February 2024. These findings demonstrate that integrating XGBoost machine learning with LEO satellite data offers a highly effective solution for GPS flex power detection. © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2025.

关键词： Global positioning system

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Noncollocated Output Feedback Control for the Semilinear Parabolic PDEs Under Input and Output Quantization

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IEEE Transactions on Automatic Control 2025年第5期70卷 2934-2947页

作者： Zhao, Xuena Liu, Zhijie Zhang, Shuang Liu, Yu He, Wei University of Science and Technology Beijing Institute of Artificial Intelligence Key Laboratory of Perception and Control of Intelligent Bionic Unmanned Systems Ministry of Education School of Intelligence Science and Technology Beijing100083 China School of Automation Science and Engineering Engineering Research Center of Precision Electronic Manufacturing Equipment of Ministry of Education Guangzhou510640 China Institute of Artificial Intelligence Key Laboratory of Perception and Control of Intelligent Bionic Unmanned Systems Ministry of Education School of Intelligence Science and Technology Beijing100083 China School of Automation Beijing102206 China

In the context of increasingly networked control systems, this article concentrates on the noncollocated control issue of input and output quantization for industrial processes governed by semilinear parabolic partial differential equation (PDE) systems. Both the control and measurement signals are quantized and transmitted through the network, which causes signal errors and reduces the stability and robustness of the system. A Luenberger-type PDE observer is developed to overcome the control difficulty of quantized measurement feedback signals and noncollocated pointwise sensors. Based on the observed value, a feedback controller is proposed, which undergoes quantization and operates on the distributed actuators within the domain. By employing the Lyapunov direct method, it is demonstrated that the observer can accurately track the system state with exponential precision, and the closed-loop system is exponentially converged. The well-posedness analysis of the closed-loop system is discussed via the C0-semigroup method. The performance of the developed control strategy is validated through simulation examples. © 1963-2012 IEEE.

关键词： Feedback control

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Modeling, Estimation, and Applications of Phase Noise in Wireless Communications: A Survey

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IEEE Communications Surveys and Tutorials 2025年第2期27卷 912-940页

作者： Chang, Zikai Xu, Yuntao Chen, Junjie Xie, Ning He, Yejun Li, Hongbin Shenzhen University State Key Laboratory of Radio Frequency Heterogeneous Integration Guangdong Key Laboratory of Intelligent Information Processing College of Electronics and Information Engineering Shenzhen518060 China Stevens Institute of Technology Department of Electrical and Computer Engineering HobokenNJ07030 United States

Phase noise is inevitably present in wireless communications, arising from both hardware impairments and imperfect channel estimation, and has substantial implications on the integrity and efficiency of communication systems. However, phase noise brings more to wireless systems than just negative effects. For instance, phase noise can be used as a physical layer feature to authenticate received signals and as a source for random number generation. There is a surprising lack of a comprehensive overview of the state-of-the-art estimation methods and applications of phase noise in wireless communications. In this paper, we conduct the first comprehensive survey on the modeling, estimation, and applications of phase noise in wireless communications. We review the state-of-the-art phase-noise models, phase-noise estimation, and mitigation techniques via joint transmit-receive design, as well as applications of phase noise in wireless communications, while highlighting contributions and critical issues of each reviewed work. Finally, we provide an expansive set of research directions, accompanying challenges, and potential solutions related to phase noise that could shape the future of phase noise research in wireless communications. © 1998-2012 IEEE.

关键词： Phase noise

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Plunger motor fault analysis method based on improved wavelet packet threshold denoising and feature signal extraction

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Noise and Vibration Worldwide 2025年第3期56卷 186-202页

作者： Hui, Huang Guo, Yi Xu, Chen Su, Junshou Huang, Qiufang Yuzheng, Li Key Laboratory of Fluid Power and Intelligent Electro-Hydraulic Control Fuzhou University Fuzhou China XCMG State Key Laboratory Technology Co. Ltd. Xuzhou China Fulongma Group Co. Ltd Longyan China

Aiming at the characteristics of dense noise sources, cross noise frequency, and non-linearity and non-stationarity of the acoustic signal inside the plunger motor, an improved wavelet packet threshold denoising combined with ensemble empirical modal analysis and Hilbert transform is proposed as the feature signal extraction method. By collecting vibration signals of both fault free and faulty motors under normal operation, constructing a wavelet packet secondary decomposition structure and thresholding to analyze and denoise the collected signals, and then using an improved signal processing method to obtain the true characteristic signal frequency of the plunger motorThe novelty of this study lies in the integration of advanced signal processing techniques to enhance fault detection accuracy by effectively handling noise and extracting characteristic frequencies in complex operational environments. Experimental validation shows that the proposed method effectively enhances the feature extraction of plunger motors, providing a reliable basis for fault diagnosis. © The Author(s) 2025.

关键词： Wavelet decomposition

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Silicon 3D-integrated 2 × 2 × 106.25 Gbps parallel multimode transmitter

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Optics Letters 2025年第9期50卷 2888-2891页

作者： Ran, Shihuan Sun, Yao Miao, Ting Chu, Bohan Li, Yu Chen, Jianping Zhou, Linjie State Key Laboratory of Advanced Optical Communication Systems and Networks Department of Electronic Engineering Shanghai Jiao Tong University Shanghai200240 China SJTU-Pinghu Institute of Intelligent Optoelectronics Pinghu314200 China

Mode division multiplexing (MDM) has garnered significant attention for its potential to enhance communication capacity. In this paper, we present for the first time, to the best of our knowledge, a 3D-integrated parallel multimode transmitter, featuring two multimode fibers, with both TE0 and TE1 modes transmitted for data multiplexing. Each channel exhibits an electro-optic (EO) bandwidth of ∼45 GHz, enabling a total transmission of 2 × 2 × 106.25 Gbps upon four-level pulse amplitude modulation (PAM-4). © 2025 Optica Publishing Group. All rights, including for text and data mining (TDM), Artificial Intelligence (AI) training, and similar technologies, are reserved.

关键词： Bandwidth

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Scaling law of launch velocity in laser-induced microparticle impact testing

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Science China(Physics,Mechanics & Astronomy) 2025年第5期Mechanics & Astronomy) .卷 155-167页

作者： Yiping Song Zhoupeng Gu Minqiang Jiang Qiuyun Yin Chenguang Huang Xianqian Wu Anhui Institute of Optics and Fine Mechanics Hefei Institutes of Physical Science Chinese Academy of Sciences Science Island Branch University of Science and Technology of China Key Laboratory of Mechanics in Fluid Solid Coupling Systems Institute of Mechanics Chinese Academy of Sciences State Key Laboratory of Nonlinear Mechanics Institute of Mechanics Chinese Academy of Sciences

Laser-induced microparticle impact testing(LIPIT) is a useful method for measuring the dynamic mechanical behavior of materials under ultra-high strain rates by accelerating and launching a single microparticle at high velocity. It is important to establish a scaling law for the laser-induced microparticle launching system to optimize its configurations and improve the achievable velocity of the microparticle. In this study, the physical process of laser-induced microparticle launching is analyzed.A scaling law for the launch system is obtained by dimensional analysis. The influence of dominant dimensionless parameters on the dimensionless velocity of the microparticle is then assessed by numerical simulations. The results show that the dimensionless launch velocity of the microparticle increases with increasing dimensionless energy and dimensionless time of the laser pulse and with decreasing dimensionless thickness of metal and elastomer films and the dimensionless mass of the microparticle. Finally, the dimensionless formulas for predicting the velocity of the microparticle of the launch system with thick-metal-film and thin-metal-film configurations are determined, respectively. This study promotes the understanding of the launch mechanisms of LIPIT and provides a guideline for optimizing its configuration to achieve a wide range of impact velocities of the microparticles.

关键词： laser-induced microparticle impact testing scaling law launch velocity dimensional analysis numerical simulation

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