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SSrN 2025年

作者： Cheng, Ming Qian, Yijia Zhao, Bohan Zhang, Nan Sun, Lihua Liu, ranbin Hao, Xiaodi Shi, Chen Sino-Dutch R&D Centre for Future Wastewater Treatment Technologies Key Laboratory of Urban Stormwater System and Water Environment Beijing University of Civil Engineering and Architecture Beijing100044 China Beijing100081 China Beijing100044 China

Alginate-like extracellular polymers (ALE) extracted from excess sludge, as well as their precursors alkaline extraction extracellular polymeric substances (AEPS), have been expected to achieve sustainable development in response to the resource-climate crisis and to enable the transformation of water resource plants. However, the extracted biopolymers are at risk of pollutant fugacity due to the sludge originating from wastewater plants with a complex pollution environment. Therefore, the aim of this study was to quantify the effect of different factors on the occurrence of sulfamethoxazole (SMX) in different biopolymers from four sludge categories, analyzing the mass balance of SMX throughout the extraction process. Characterization illustrated that the biopolymers extracted from the four sludges had different chemical compositions and physicochemical properties;the results of the mass balance experiments showed that SMX was much more abundant in AEPS than in ALE, with the highest content in AGS (about 28%) and the lowest in AdS;the results of the response surface showed that pH among the environmental factors had the greatest influence on SMX incorporation in the sludges. the lowest in AdS;pH among the had the most significant effect on SMX existence in biopolymers. These results have potential significance for understanding sludge-sulfamethoxazole interactions and provide important reference information for process selection for large-scale application of EPS extraction from sludge. © 2025, The Authors. All rights reserved.

关键词： Alkalinity

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dynamic Security Evaluation Method for Power systems Considering Cascading Failures 7

Dynamic Security Evaluation Method for Power Systems Conside...

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7th IEEE Conference on Energy Internet and Energy system Integration, EI2 2023

作者： Liu, ren Xu, Xingye du, Wei Xiahou, Kaishun Zhu, Yihua Chang, dongxu Guo, Hengdao Electric Power Research Institute of China Southern Power Grid Csg Key Laboratory For Power System Simulation Guangzhou China School of Electric Power Engineering South China University of Technology Guangzhou China Electric Power Research Institute of China Southern Power Grid State Key Laboratory of Hvdc Guangzhou China China Southern Power Grid National Energy Power Grid Technology R&d Centre Guangzhou China Intelligent Operation and Control For New Energy Power System Guangdong Provincial Key Laboratory of China Southern Power Grid Guangzhou China

ISBN: (纸本)9798350345094

With the increasing level of informatization and interconnection in the electric power system, the risk of external attacks on power systems is increasing. In response to the drawbacks of traditional static security assessment methods, this paper establishes two security metrics, which are voltage and power flow amplitude deviation security metric and power flow entropy security metric. Based on these security metrics, a dynamic security evaluation model that considers cascading failure is proposed. Simulation results demonstrate that the proposed security metrics can effectively reflect the security of cascading failure propagation, thereby providing valuable insights for decision-making by power system operators. © 2023 IEEE.

关键词： Informatization

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UA-HGAT: Uncertainty-aware Heterogeneous Graph Attention Network for Short Text Classification 15

UA-HGAT: Uncertainty-aware Heterogeneous Graph Attention Net...

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2022 IEEE Congress on Cybermatics: 15th IEEE International Conferences on Internet of Things, iThings 2022, 18th IEEE International Conferences on Green Computing and Communications, GreenCom 2022, 2022 IEEE International Conference on Cyber, Physical and Social Computing, CPSCom 2022 and 8th IEEE International Conference on Smart data, Smartdata 2022

作者： Kong, deYan Ji, ZhenYan Sang, Yanjuan dong, Wei Yang, Yanyan Beijing Jiaotong University School of Software Engineering Beijing China Blueintelligence Technology Co.Ltd. R&d Department Wuhan China Institute of Software Chinese Academy of Sciences State Key Laboratory of Computer Science Beijing100190 China

ISBN: (数字)9781665454179

ISBN: (纸本)9781665454179

during the last decade, deep learning has played a significant role in improving text classification which is widely applied in question answering systems, comment extraction, sentiment analysis, etc. Considering that few labeled training data are available, semi-supervised short text classification needs to be studied urgently. Existing works focus on long texts and cannot achieve satisfactory performance on short texts due to the sparsity, non-standardization, and insufficient labeled data. In this paper, we propose a novel uncertainty-aware heterogeneous graph attention network for semi-supervised short text classification (UA-HGAT), which makes full use of limited labeled data and large amounts of unlabeled data via exploiting an uncertainty-aware mechanism. In the model, entity description from Wikipedia is introduced to empower short texts, and word-level information is acquired by Word2Vec. The entity description and word-level information are combined with topic information to address the issue of short text sparseness. In particular, we introduce uncertainty-aware mechanism and negative sample learning to relieve the erroneous high confidence predictions from poorly calibrated models, so that it can offer enough pseudo-label samples for the model training. Extensive experiments show that our model significantly outperforms the SOTA methods on AGNews and Snippets datasets. © 2022 IEEE.

关键词： Sentiment analysis

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A Self-Tallying Electronic Voting Based on Blockchain

A Self-Tallying Electronic Voting Based on Blockchain

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作者： Zeng, Gongxian He, Meiqi Yiu, Siu Ming Huang, Zhengan Peng Cheng Laboratory Xingke 1st Street Shenzhen China Logistics and Supply Chain MultiTech R&D Centre 100 Cyberport Road Hong Kong Department of Computer Science The University of Hong Kong Pokfulam Hong Kong

Electronic voting (e-voting) has been studied for many years. recently, researchers find that blockchain can provide an alternative secure platform for e-voting systems, because of its properties of tamper resistance and transparency. However, existing blockchain-based schemes either require central authorities to tally ballots or can only handle a limited number of voters. This paper tries to propose a self-tallying e-voting system, i.e. the public can verify the validity of all ballots and tally the ballots without a centralized authority. To achieve this goal, we solve two challenges, namely how to cancel out all random numbers used for ballots and to prove the validity of ballots using a non-interactive zero knowledge proof. Our scheme is proved to be secure and shown to be practical by experiments. © 2021 The British computer Society.

关键词： Blockchain

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A Ka-Band 4-Channel Active Phased Array TX Beamformer IC for Satellite Communications

A Ka-Band 4-Channel Active Phased Array TX Beamformer IC for...

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International Conference on Information and Communication Technology Convergence (ICTC)

作者： Yeonsu Na Sangpill Lee Choongho Song Moonkyu Cho Seungwan Jung LIG NEXI C4I R&D Laboratory Pangyo Korea Dept. of Computer Engineering Korea National University of Transportation Chungju-si Korea GRIT CIC Seoul Korea

ISBN: (数字)9798350364637

ISBN: (纸本)9798350364644

This paper presents the design of a 4-channel active phased array beamformer intended for communication with Ka-band satellites. The proposed beamformer employs an LCA-PS-LCA-dSA-PA architecture to facilitate the transmission of Active Phased Array Antennas. Measurement outcomes reveal that the transmitter achieves a gain exceeding 50dB and linear bias control within the 27.5~31GHz frequency range. The OP1dB is approximately 10dBm., and the IP1dB is measured at around -50dBm. The transmitting bandwidth spans 27.5 to 31 GHz., with a measured single-channel power of 577.5mW at 2.5V. The transmitter's measured dimensions are 8760×1440 µm 2

关键词： Antenna measurements Phased arrays Satellites Power measurement Phase measurement Transmitting antennas Gain measurement Frequency measurement Ka-band Gain

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A Transient Voltage Stability Preventive Control Strategy for dC receiving-end Power system 8

A Transient Voltage Stability Preventive Control Strategy fo...

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8th International Conference on Power and renewable Energy, ICPrE 2023

作者： Tu, Lian Zhang, Shuiping Guo, Hengdao Bao, Bo Zhu, Yihua Zuo, Jian Power Dispatch and Control Center of Guangdong Power Grid Co. Ltd China Southern Power Grid 510000 China State Key Laboratory of HVDC Electric Power Research Institute China Southern Power Grid 510663 China National Energy Power Grid Technology R&D Centre 510663 China Guangdong Provincial Key Laboratory of Intelligent Operation and Control for New Energy Power System 510663 China

ISBN: (纸本)9798350328813

With the increase of dC feed power and the decrease of the number of synchronous machines, receiving-end power system takes a serious threat to the transient voltage stability. Therefore, a transient voltage stability preventive control strategy for dC receiving-end power system is proposed in this paper. The whole method is decomposed into three sub-problems: transient voltage stability assessment, sensitivity computation and optimal control. A transient voltage stability index suitable for the sensitivity method is used to construct the transient voltage stability constraints. The accuracy and efficiency of the solution algorithm are improved by limiting the effective control interval of sensitivity and selection of the initial control set. The method has been applied in a provincial power grid in southern China. The results verifies the effectiveness of the proposed method. © 2023 IEEE.

关键词： dC receiving-end power system preventive control sensitivity transient voltage stability

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A Specific Steganalysis Approach to Effective Attacking the MB1

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Chinese Journal of Electronics 2023年第4期18卷 610-614页

作者： donghui Hu Lina Wang Xiaqiu Jiang dengpan Ye Shiguo Lian School of Computer Science Wuhan University Wuhan China School of Computer Science and Information Hefei University of Technology Hefei China The Key Laboratory of Aerospace Information Security and Trust Computing Ministry of Education Wuhan China HCI Laboratory France Telecom R&D Beijing Beijing China

MB1 is a very promising steganography and few steganalysis methods have been proposed to attack MB1 so far. In this paper, we propose a specific steganalysis method which can effectively break MB1 steganography. We draw some useful propositions based on feature which is most sensitive to MB1, and propose an effective MB1 steganalysis method. This method outperforms the existing MB1 steganalysis method in detection reliability, especially in low embedding rate case. What's more, for the first time, our method also can estimate the embedding rate of MB1 accurately. Experimental results show that the MB1 steganography has been successfully attacked by our method.

关键词： Steganography reliability

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research on Photovoltaic MPPT Based on Improved Butterfly Algorithm

Research on Photovoltaic MPPT Based on Improved Butterfly Al...

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IEEE International Conference on Power and Power and renewable Energy (ICPrE)

作者： Zun Ma Xian Meng Chao Xing Binjiang Hu Yihua Zhu Liang Tu System Analysis and DC Technology Research Institute Electric Power Research Institute of Yunnan Power Grid Co. Ltd Kunming China Power system simulation and control technology department State Key Laboratory of HVDC EPRI CSG Guangzhou China Power system simulation and control technology department National Energy Power Grid Technology R&D Centre Guangzhou China Power system simulation and control technology department CSG Key Laboratory for Power System Simulation Guangzhou China

ISBN: (数字)9798350377460

ISBN: (纸本)9798350377477

To solve slow response speed and poor stability of traditional MPPT algorithms under rapidly changing environmental conditions, a MPPT control strategy combining improved butterfly algorithm and disturbance observation method is proposed. Firstly, the butterfly position in the population is initialized by Tent map, increasing the search space; Secondly, Gaussian mutation strategy is introduced to make the algorithm break out of local extremes; Then, a dynamic probability switching mechanism is adopted to balance the weight relationship between global and local search, improving algorithm optimization efficiency; Finally, in the later stage, disturbance observation method is used to track the maximum power and reduce power oscillation. Simulation examples show that the proposed algorithm can find the maximum power point quickly and accurately under both static and dynamic shading conditions, and the power output is more stable.

关键词： Maximum power point trackers Photovoltaic systems renewable energy sources Heuristic algorithms Switches Aerospace electronics Stability analysis Oscillators Optimization

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GPU Acceleration Method Based on range-doppler Highly Squint Algorithm

GPU Acceleration Method Based on Range-Doppler Highly Squint...

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China International SAr Symposium (CISS)

作者： Yang Gao JianHui Han Hongnan Tian ruigang Zhang ShiChao Zheng Hui Wang Beijing R&D Center Shanghai Key Laboratory of Aerospace Milimeter Wave Information Technology Shanghai Academy of Spaceflight Technology Beijing China Department of Electronic System Beijing R&D Center Shanghai Academy of Spaceflight Technology Beijing China Shanghai Key Laboratory of Aerospace Milimeter Wave Information Technology Shanghai Institute of Satelite Engineering Shanghai China

Synthetic Aperture radar (SAr) imaging has the characteristics of all-weather, all-sky time and strong ground penetration, which can obtain high resolution two-dimensional images under unfavorable conditions, and promote the construction of national defense. Highly squinted SAr has the ability to detect in the slant forward area of the carrier in advance and has strong flexibility. With the improvement of processing resolution, the amount of data increases significantly, and the real-time processing is difficult to be satisfied. This paper proposes a GPU acceleration method based on highly squinted SAr imaging algorithm, and introduces the acceleration steps of the imaging algorithm under the cooperation of CPU and GPU in detail. The results show that, under the GPU operation, especially the acceleration ratio of range migration correction exceeds 80, the imaging efficiency is significantly improved, which has high practical value.

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IB-MVS: An Iterative Algorithm for deep Multi-View Stereo based on Binary decisions 32

IB-MVS: An Iterative Algorithm for Deep Multi-View Stereo ba...

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32nd British Machine Vision Conference, BMVC 2021

作者： Sormann, Christian rossi, Mattia Kuhn, Andreas Fraundorfer, Friedrich Institute of Computer Graphics and Vision Graz University of Technology Austria Sony Europe B.V. R&D Center Stuttgart Laboratory 1 Germany

We present a novel deep-learning-based method for Multi-View Stereo. Our method estimates high resolution and highly precise depth maps iteratively, by traversing the continuous space of feasible depth values at each pixel in a binary decision fashion. The decision process leverages a deep-network architecture: this computes a pixelwise binary mask that establishes whether each pixel actual depth is in front or behind its current iteration individual depth hypothesis. Moreover, in order to handle occluded regions, at each iteration the results from different source images are fused using pixelwise weights estimated by a second network. Thanks to the adopted binary decision strategy, which permits an efficient exploration of the depth space, our method can handle high resolution images without trading resolution and precision. This sets it apart from most alternative learning-based Multi-View Stereo methods, where the explicit discretization of the depth space requires the processing of large cost volumes. We compare our method with state-of-the-art Multi-View Stereo methods on the dTU, Tanks and Temples and the challenging ETH3d benchmarks and show competitive results. © 2021. The copyright of this document resides with its authors.

关键词： Pixels

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