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2024 IEEE International Conference on Electrical Energy Conversion Systems and Control, IEECSC 2024

作者： Wang, Jinfeng Cao, Tiantian Ye, Zhengyang Wan, Xiaorong Li, Dayi Electric Power Scientific Research Institute of Guangdong Power Grid Co. Ltd Guangdong China Huazhong University of Science and Technology State Key Laboratory of Advance Electromagnetic Engineering and Technology Wuhan China

ISBN: (纸本)9798350389357

In order to overcome the limitation that the inductance value of the conventional reactor changes in the power system, a new type of flux controllable reactor access system stability analysis is studied in this paper. Firstly, the topology and working principle of the flux controllable reactor are introduced, and the change of the equivalent impedance of the controllable reactor under the condition of actual injection signal delay is analyzed. The research shows that the delay has great influence on the equivalent impedance of the controllable reactor, and the equivalent impedance of the reactor may show negative resistance characteristics according to the difference of the delay time. Especially when there is a resistive load, the system may have resonance phenomenon, resulting in abnormal increase of the power grid current, and then cause the wrong operation of the relay protection device, which needs to take corresponding suppression measures. Secondly, the influence of delay on the stability of flux-controlled reactor access system is discussed. The correctness and effectiveness of the proposed method are verified by theoretical analysis and simulation model. The research results provide an important reference for the stable application of flux controllable reactor in power system, and help to improve the stability and reliability of power system. © 2024 IEEE.

关键词： Negative resistance

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Selective inhibition of resistant bacterial pathogens using a β-lactamase-activatable antimicrobial peptide with significantly reduced cytotoxicity

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Chinese Chemical Letters 2023年第5期34卷 241-245页

作者： Weipan Xu Zheng Ma Geetika Dhanda Jayanta Haldar Hexin Xie State Key Laboratory of Bioreactor Engineering Shanghai Key Laboratory of New Drug DesignFrontiers Science Center for Materiobiology and Dynamic ChemistryShanghai Frontier Science Research Base of Optogenetic Techniques for Cell MetabolismSchool of PharmacyEast China University of Science and TechnologyShanghai 200237China Antimicrobial Research Laboratory New Chemistry UnitJawaharlal Nehru Centre for Advanced Scientific Research(JNCASR)JakkurBengaluru 560064India School of Advanced Materials Jawaharlal Nehru Centre for Advanced Scientific Research(JNCASR)JakkurBengaluru 560064India

The expression ofβ-lactamase,particularly metallo-β-lactamase(MBL)in bacteria has caused significant resistance to clinically importantβ-lactam antibiotics,including life-saving *** peptides(AMPs)have emerged as promising therapeutic agents to combat antibiotic ***,the cytotoxic AMPs has been one of the major concerns for their applications in clinical ***,we report a novel cephalosporin-caged AMP,which shows significantly reduced cytotoxicity,hemolytic activity,and antibacterial activity but turns highly active against bacteria upon specific hydrolysis by the antimicrobial resistance-causativeβ-*** investigations demonstrate thisβ-lactamaseactivatable AMP selectively inactivates resistant bacterial pathogens over susceptible *** strategy should be applicable to other AMPs as a potential solution for the treatment of infectious diseases caused byβ-lactamase-expressing pathogenic bacteria.

关键词： Antibiotic resistance β-Lactamase Antimicrobial peptide Cytotoxicity

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New Insights into Microplastic Contamination in Different Types of Leachates: Abundances, Characteristics, and Potential Sources

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engineering 2024年第6期37卷 62-68页

作者： Lei Zhang Wentao Zhao Liang Zhang Zhenxiao Cai Ruiqi Yan Xia Yu Damià Barceló Qian Sui State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process School of Resources and Environmental EngineeringEast China University of Science and TechnologyShanghai 200237China State Key Laboratory of Pollution Control and Resource Reuse College of Environmental Science and EngineeringTongji UniversityShanghai 200092China Shanghai Institute of Pollution Control and Ecological Security Shanghai 200092China PerkinElmer Inc.Shanghai 201203China Maihai Environmental Protection Technology Co. Ltd.SuzhouJiangsu 215000China Department of Environmental Chemistry Institute of Environmental Assessment and Water ResearchSpanish Council for Scientific Research(IDAEA-CSIC)Barcelona 08034Spain

Municipal solid waste(MSW)is an important destination for abandoned *** the waste disposal process,large plastic debris is broken down into microplastics(MPs)and released into the ***,current research only focuses on landfill leachates,and the occurrence of MPs in other leachates has not been ***,herein,the abundance and characteristics of MPs in three types of leachates,namely,landfill leachate,residual waste leachate,and household food waste leachate,were studied,all leachates were collected from the largest waste disposal center in *** results showed that the average MP abundances in the different types of leachates ranged from(129±54)to(1288±184)MP particles per liter(particlesL1)and the household food waste leachate exhibited the highest MP abundance(p<0.05).Polyethylene(PE)and fragments were the dominant polymer type and shape in MPs,*** characteristic polymer types of MPs in individual leachates were ***,the conditional fragmentation model indicated that the landfilling process considerably affected the size distribution of MPs in leachates,leading to a higher percentage(>80%)of small MPs(20–100 lm)in landfill leachates compared to other *** the best of our knowledge,this is the first study discussing the sources of MPs in different leachates,which is important for MP pollution control during MSW disposal.

关键词： Microplastics Landfill leachate Residual waste leachate Household food waste leachate Source

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Whole-Function Vectorization Based on Simplified Openmp Directives

SSRN

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SSRN 2024年

作者： Liu, Lili Yao, Jinyang Li, Yingying Zhang, Ping Xu, Jinlong Zhao, Bo Shan, Zheng State Key Laboratory of Mathematical Engineering and Advanced Computing Henan Zhengzhou450001 China

With the continuous development of computing technology, an increasing number of vendors have integrated SIMD extension components into processors. These components can accelerate program execution efficiency and have been widely applied in various fields. Past research on SIMD components has primarily focused on loop-level and superword-level, while function-level vectorization can further exploit the parallel potential of these components, thereby enhancing application performance. Currently, OpenMP can achieve function vectorization based on directives. However, this method requires directives to be added to both the loop where the call point is located and the called functions, which is cumbersome and increases the burden on programmers. This paper proposes a directive-based function vectorization method. First, we extend the clauses in OpenMP directives concerning function vectorization data parallelism. Secondly, we implement in the compiler the functionality to automatically add corresponding directives to called functions within functions with the omp simd clone attribute and within OMP_SIMD loops. Finally, we achieve vectorization of loops containing function calls through directives. This method fully exploits the advantages of SIMD instructions, improving application performance. We selected 16 benchmarks from ISPC benchmarks and SIMD library benchmarks to evaluate our method. Experimental results show that compared to scalar, the average speedup reached 4.716x. © 2024, The Authors. All rights reserved.

关键词： Application programming interfaces (API)

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Quantification of valve stiction in control loops using adaptive differential evolution algorithm

Quantification of valve stiction in control loops using adap...

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2024 China Automation Congress, CAC 2024

作者： Yang, Dong Lang, Xun Wu, Jiande Yu, Wanke Liu, Songhua Xie, Lei Department of Electronic Engineering Information School Yunnan University Kunming China Yunnan Key Laboratory of Intelligent Systems and Computing Yunnan University Kunming China School of Automation China University of Geosciences Wuhan China State Key Laboratory of Industrial Control Technology Zhejiang University Hangzhou China

ISBN: (纸本)9798350368604

Accurately and promptly quantifying stiction is crucial for valve maintenance in industrial settings and ensuring the stability of control loop performance. However, current Hammerstein-based stiction quantification methods overlook valve dynamics, potentially leading to inaccurate quantification. Therefore, this paper proposes a novel stiction quantification method based on an adaptive differential evolution algorithm. In addition to considering the impact of valve dynamics on stiction, the proposed method demonstrates a certain level of robustness against the interference of unknown noise. Finally, the effectiveness of the proposed method is demonstrated through a series of simulations and industrial case studies. © 2024 IEEE.

关键词： Adaptive algorithms

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2024 China Automation Congress, CAC 2024

作者： Lang, Yumin Wu, Jiande Lang, Xun Yu, Wanke Yang, Chuanyan Su, Hongye Department of Electronic Engineering Information School Yunnan University Kunming China Yunnan Key Laboratory of Intelligent Systems and Computing Yunnan University Kunming China School of Automation China University of Geosciences Wuhan China State Key Laboratory of Industrial Control Technology Zhejiang University Hangzhou China

ISBN: (纸本)9798350368604

Oscillation is a significant indication of the deterioration of control system performance and needs to be carefully monitored to ensure safe and stable process operations. However, industrial processes are often prone to noisy artifacts and nonstationary trends, resulting in low signal-to-noise ratios. In order to tackle this problem, this study introduces a novel framework for enhanced trend removal and noise reduction, which is featured by the following steps:(i) The circulant singular spectrum analysis (CiSSA) is used to decompose oscillation data into several reconstructed components (RCs). (ii) The estimated power spectral density (PSD) ofthese RCs is then smoothed using the Savitzky-Golay filter (SGF) to eliminate noise and identify the RCs corresponding to oscillatory components. (iii) These identified RCs are subsequently reconstructed to produce purified oscillatory data. The effectiveness of the suggested approach is validated using simulations and real-world industrial case studies. The findings indicate that the method notably enhances the quality of oscillatory data. © 2024 IEEE.

关键词： Power spectral density

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HPC Application Parameter Autotuning on Edge Devices: A Bandit Learning Approach 31

HPC Application Parameter Autotuning on Edge Devices: A Band...

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31st Annual IEEE International Conference on High Performance computing, Data, and Analytics, HiPC 2024

作者： Hossain, Abrar Badawy, Abdel-Hameed A. Islam, Mohammad A. Patki, Tapasya Ahmed, Kishwar Department of Electrical Engineering and Computer Science The University of Toledo United States Department of Electrical and Computer Engineering New Mexico State University United States Department of Computer Science and Engineering The University of Texas Arlington United States Center for Applied Scientific Computing Lawrence Livermore National Laboratory United States

ISBN: (纸本)9798331509095

The growing necessity for enhanced processing capabilities in edge devices with limited resources has led us to develop effective methods for improving high-performance computing (HPC) applications. In this paper, we introduce LASP (Lightweight Autotuning of scientific Application Parameters), a novel strategy designed to address the parameter search space challenge in edge devices. Our strategy employs a multi-armed bandit (MAB) technique focused on online exploration and exploitation. Notably, LASP takes a dynamic approach, adapting seamlessly to changing environments. We tested LASP with four HPC applications: Lulesh, Kripke, Clomp, and Hypre. Its lightweight nature makes it particularly well-suited for resource-constrained edge devices. By employing the MAB framework to efficiently navigate the search space, we achieved significant performance improvements while adhering to the stringent computational limits of edge devices. Our experimental results demonstrate the effectiveness of LASP in optimizing parameter search on edge devices. © 2024 IEEE.

关键词： Edge computing

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Stacking monolayers at will:A scalable device optimization strategy for two-dimensional semiconductors

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Nano Research 2022年第7期15卷 6620-6627页

作者： Xiaojiao Guo Honglei Chen Jihong Bian Fuyou Liao Jingyi Ma Simeng Zhang Xinzhi Zhang Junqiang Zhu Chen Luo Zijian Zhang Lingyi Zong Yin Xia Chuming Sheng Zihan Xu Saifei Gou Xinyu Wang Peng Gong Liwei Liu Xixi Jiang Zhenghua An Chunxiao Cong Zhijun Qiu Xing Wu Peng Zhou Xinyu Chen Ling Tong Wenzhong Bao State Key Laboratory of ASIC and System School of MicroelectronicsZhangjiang Fudan International Innovation CenterFudan UniversityShanghai 200433China The Hong Kong Polytechnic University Shenzhen Research Institute Shenzhen 518057China Department of Physics State Key Laboratory of Surface PhysicsInstitute of Nanoelectronic Devices and Quantum Computing and Key Laboratory of MicroFudan UniversityShanghai 200433China State Key Laboratory of ASIC and System School of Information Science and EngineeringFudan UniversityShanghai 200433China Shanghai Key Laboratory of Multidimensional Information Processing Department of Electronic Engineering East China Normal UniversityShanghai 200241China Shenzhen Six Carbon Technology Shenzhen 518055China Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials Fudan UniversityShanghai 200433China

In comparison to monolayer(1L),multilayer(ML)two-dimensional(2D)semiconducting transition metal dichalcogenides(TMDs)exhibit more application potential for electronic and optoelectronic devices due to their improved current carrying capability,higher mobility,and broader spectral ***,the investigation of devices based on wafer-scale ML-TMDs is still restricted by the synthesis of uniform and high-quality ML *** this work,we propose a strategy of stacking MoS_(2) monolayers via a vacuum transfer method,by which one could obtain wafer-scale high-quality MoS_(2) films with the desired number of layers at *** optical characteristics of these stacked ML-MoS_(2) films(>2L)indicate a weak interlayer *** stacked MLMoS_(2) phototransistors show improved optoelectrical performances and a broader spectral response(approximately 300-1,000 nm)than that of 1L-MoS_(2).Additionally,the dual-gate ML-MoS_(2) transistors enable enhanced electrostatic control over the stacked ML-MoS_(2) channel,and the 3L and 4L thicknesses exhibit the optimal device performances according to the turning point of the current on/off ratio and the subthreshold swing.

关键词： two-dimensional semiconductor field-effect transistors chemical vapor deposition(CVD)synthesis interlayer coupling vacuum transfer method dual-gate transistor

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Roll-to-roll printing trench-like metasurface film for radiative cooling

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Light(Science & Applications) 2023年第12期12卷 2538-2539页

作者： Yaoguang Ma State Key Laboratory of Extreme Photonics and Instrumentation College of Optical Science and EngineeringInternational ResearchCenter for Advanced PhotonicsZhejiang UniversityHangzhou 310027China ZJU-Hangzhou Global Scientific and Technological Innovation Center Hangzhou 311215China Jiaxing Key Laboratory of Photonic Sensing&Intelligent Imaging Intelligent Optics&Photonics Research CenterJiaxing Research InstituteZhejiang UniversityJiaxing 314000China

A Roll-to-roll technology can enable the fabrication of trench-like photonic meta-structures that are strongly absorptive in the MIR region,providing a controllable optical response for diurnal radiative cooling.

关键词： trench radiative printing

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An Abnormal Domain Name Generation Method Based on a Character-Level Model 22

An Abnormal Domain Name Generation Method Based on a Charact...

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Proceedings of the 2022 4th International Conference on Robotics, Intelligent Control and Artificial Intelligence

作者： Chunbing Wu Jinlong Fei State Key Laboratory of Mathematical Engineering and Advanced Computing China

ISBN: (纸本)9781450398343

Internet technology develops by leaps and bounds, new types of botnet attacks are springing up. Currently, most malware are stealthy when implementing attacks since they can bypass detection strategies such as blacklists and sinkholes. These malware mainly use DGA to generate many random domain names to prevent C&C server IP addresses from being traced to the source. To resist botnet attacks, machine-learning methods have been proposed for detecting abnormal domain names. However, there are still some inadequacies, e.g., detection methods based on manual feature extraction couldn't identify novel variant DGA domains, and existing neural network detection methods have weak generalization ability and lack training data for new variant DGA domain names. To address the above problems, this paper proposes an abnormal domain name data generation technology based on a character-level model. Firstly, combining specific text generation-related ideas improves the character-level language model. Secondly, the Bi-GRU network model and attention mechanism are used to thoroughly learn the internal correlation features, and simulate the generation of abnormal domain names. The experimental results show that this method's abnormal domain name data is highly similar to the actual domain name in relative entropy and character composition. Furthermore, it verifies the feasibility of the generated data as training data set for a new variant DGA domain name, which to a certain extent, helps to improve the generalization ability of the abnormal domain name detection model.

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