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Advances in air pollution control for key industries in China during the 13th five-year plan

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Journal of Environmental Sciences 2023年第1期123卷 446-459页

作者： Xuecheng Wu Yanping Yang Yue Gong Zhiwen Deng Ying Wang Weihong Wu Chenghang Zheng yongxin zhang State Key Laboratory of Clean Energy Utilization College of Energy EngineeringZhejiang UniversityHangzhou 310027China Jiaxing Research Institute of Zhejiang University Jiaxing 314051China

Industrial development is an essential foundation of the national economy,but the industry is also the largest source of air pollution,of which power plants,iron and steel,building materials,and other industries emit large amounts of ***,the Chinese government has promulgated a series of stringent emission regulations,and it is against this backdrop that research into air pollution control technologies for key industrial sectors is in full *** particular,during the 13th Five-Year Plan,breakthroughs have been made in pollution control technology for key industrial sectors.A multi-pollutant treatment technology system of desulfurization,denitrification,and dust collection,which applies to key industries such as power plants,steel,and building materials,has been ***-performance materials for the treatment of different pollutants,such as denitrification catalysts and desulfurization absorbers,were *** the same time,multi-pollutant synergistic removal technologies for flue gas in various industries have also become a hot research topic,with important breakthroughs in the synergistic removal of NO_(x),SO_(x),and *** to the increasingly stringent emission standards and regulations in China,there is still a need to work on the development of multi-pollutant synergistic technologies and further research and development of synergistic abatement technologies for CO_(2) to meet the requirements of ultra-low emissions in industrial sectors.

关键词： Key industries Desulfurization Denitrification Dust collection Multi-pollutant control

Theoretical connection from the dielectric constant of films to the capacitance of capacitors under high temperature

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High Voltage 2023年第4期8卷 707-716页

作者： yongxin zhang Qikun Feng Shaolong Zhong Jiayao Pei Fangyi Chen Lei Huang Zhe Yang Zhimin Dang Department of Electrical Engineering Tsinghua UniversityBeijingChina Department of Electrical and Computer Engineering Carnegie Mellon UniversityPittsburghPennsylvaniaUSA Department of Energy Technology Aalborg UniversityAalborgDenmark

In the process of coping with energy and environmental protection issues,technologies such as energy materials,energy devices,and energy systems have made great *** excellent performance,film capacitors play an increasingly important role in energyrelated *** the increase of application scenarios and the continuous development of film material technology,it is urgent to establish a better theoretical connection from films to ***,the main components of the capacitor including the film and the positional relationships among them are ***,from the two perspectives of indirect calculation according to the volume and the direct calculation according to the winding process,the equation between the dielectric constant of films and the corresponding capacitance of capacitors is ***,the measurement data and error analysis results of the built test platform prove the accuracy and great potential of the proposed calculation *** addition,error sources,including film thickness uniformity,are ***,the challenges faced by the proposed calculation methods and the paths that can be referenced for future research are summarised and discussed.

关键词： film dielectric capacitance

A survey on federated learning:a perspective from multi-party computation

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Frontiers of Computer Science 2024年第1期18卷 93-103页

作者： Fengxia LIU Zhiming ZHENG Yexuan SHI yongxin TONG Yi zhang Institute of Artificial Intelligence and Key Laboratory of Mathematics Informatics Behavioral Semantics Beihang UniversityBeijing 100191China State Key Laboratory of Software Development Environment and Advanced Innovation Center for Future Blockchain and Privacy Computing Beihang UniversityBeijing 100191China Pengcheng Laboratory Shenzhen 518055China Zhongguancun Laboratory Beijing 100190China Institute for Mathematical Sciences and Engineering Research Center of Financial Computing and Digital Engineering Renmin University of ChinaBeijing 100872China

Federated learning is a promising learning paradigm that allows collaborative training of models across multiple data owners without sharing their raw *** enhance privacy in federated learning,multi-party computation can be leveraged for secure communication and computation during model *** survey provides a comprehensive review on how to integrate mainstream multi-party computation techniques into diverse federated learning setups for guaranteed privacy,as well as the corresponding optimization techniques to improve model accuracy and training *** also pinpoint future directions to deploy federated learning to a wider range of applications.

关键词： sfederated learning multi-party ycomputation privacy-preserving data mining distributed learning

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研制低压配变电缆出线防护装置

农村电气化 2024年第2期 73-74,91页

作者：黄天祥张琰美张永鑫刘渝铭曹先德国网福建省电力有限公司龙岩市新罗区供电公司福建龙岩361000

本研究旨在解决低压配电网中电缆出线短路隐患的问题。为此,设计了一种新型防护管,主要由聚四氟乙烯管、连接机构和防护机构3部分组成。该防护管能够有效保护电缆免受外界环境的影响,同时快速安装和拆卸,便于故障排查。该防护管可以有... 详细信息

本研究旨在解决低压配电网中电缆出线短路隐患的问题。为此,设计了一种新型防护管,主要由聚四氟乙烯管、连接机构和防护机构3部分组成。该防护管能够有效保护电缆免受外界环境的影响,同时快速安装和拆卸,便于故障排查。该防护管可以有效降低电缆故障率,提高电力供应的稳定性和可靠性。本研究对解决低压配变电缆出线短路隐患提供了新的解决方案。

关键词：低压配变电缆出线短路隐患防护管

基于人工智能的工程监理信息异常检测仿真技术研究

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粘接 2024年第2期51卷 171-174页

作者：黄赐豪张建宁张永炘侯铁铸黄鸿杰广东创成建设监理咨询有限公司广东广州520000

为降低工程监理信息系统异构感知网络的入侵攻击,建立了工程监理信息系统入侵检测模型,并将聚类协议与人工智能算法相结合,以提高系统入侵检测效率。实验结果表明,人工智能算法的准确率、F1分数、召回率均大于99.5%,可有效检测到工程监... 详细信息

为降低工程监理信息系统异构感知网络的入侵攻击,建立了工程监理信息系统入侵检测模型,并将聚类协议与人工智能算法相结合,以提高系统入侵检测效率。实验结果表明,人工智能算法的准确率、F1分数、召回率均大于99.5%,可有效检测到工程监理数据信息异常获取,拒绝服务类攻击及病毒类攻击,从而保证工程监理信息系统运行正常。当误报率为0时,基于人工智能算法的入侵检测率高达97.3%;当误报率为100%,入侵检测率仍高达91.2%。研究结果可为工程监理信息系统检测提供参考依据。

关键词：人工智能算法工程监理信息系统检测异构感知网络

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直流支撑电容器圆元件的散热模型与仿真研究

电力电容器与无功补偿 2024年第1期45卷 121-127页

作者：左强林雷乔舒钟少龙张涌新党智敏无锡赛晶电力电容器有限公司江苏无锡214177 清华大学电机系新型电力系统运行与控制全国重点实验室北京100084

随着自愈干式金属化薄膜电容器应用范围的不断扩展,其散热方式与内部温升问题成为了重要的理论与工程问题。鉴于此,本文基于直流支撑电容器圆元件的发热规律,分析了电容器元件圆柱状整体均匀发热时发热体的热流分布。进一步,结合电热对... 详细信息

随着自愈干式金属化薄膜电容器应用范围的不断扩展,其散热方式与内部温升问题成为了重要的理论与工程问题。鉴于此,本文基于直流支撑电容器圆元件的发热规律,分析了电容器元件圆柱状整体均匀发热时发热体的热流分布。进一步,结合电热对偶原理,建立了圆元件热计算模型,并通过微分单元积分,得到了圆元件的热阻计算公式。最后,通过试验验证了圆元件的热计算模型的正确性,且提出了圆元件热计算的验证方法,为直流支撑电容器圆元件的发热提供理论与试验参考。

关键词：直流支撑电容器干式电容器圆元件散热模型轴向散热径向散热

高温储能电容器用全有机PVDF/PI复合薄膜制备及性能表征

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电力电容器与无功补偿 2024年第1期45卷 68-75页

作者：冯启琨张涌新王昕劼王健涛党智敏清华大学电机系新型电力系统运行与控制全国重点实验室北京100084

高温介电聚合物在高温静电储能薄膜电容器中有着广阔的应用。然而,目前常规的高温聚合物电介质介电常数与能量密度较低,这限制了其在高温环境中的应用。为进一步提高高温电介质材料在高温下的介电及储能特性,本研究以聚偏氟乙烯(polyvin... 详细信息

高温介电聚合物在高温静电储能薄膜电容器中有着广阔的应用。然而,目前常规的高温聚合物电介质介电常数与能量密度较低,这限制了其在高温环境中的应用。为进一步提高高温电介质材料在高温下的介电及储能特性,本研究以聚偏氟乙烯(polyvinylidene fluoride,PVDF)为填料,聚酰亚胺(polyimide,PI)为基体,采用原位聚合方法制备了全有机PVDF/PI复合电介质薄膜。系统地研究了铁电PVDF相含量对PI微观结构与形貌、介电性能、储能特性、以及热性能等影响。结果表明:PVDF填料在PI基体中具有良好的相容性和分散。PVDF的引入会使得PI基复合薄膜的击穿强度出现一定程度的下降,但是可以明显提高复合薄膜的介电常数和放电能量密度。其中,PVDF添加质量分数为30的复合薄膜在室温和250 MV/m条件下放电能量密度达到1.89 J/cm^(3),充放电效率为92.4%;而100℃和200 MV/m条件下的放电能量密度达到1.13 J/cm^(3),充放电效率为89.1%。此外,PVDF/PI复合薄膜在高温和高电场的恶劣条件下具有良好的充放电循环性能以及热稳定性。该研究为改善聚合物基复合电介质在高温环境中的储能特性提供了一种新的设计思路。

关键词：薄膜电容器全有机电介质介电性能储能特性循环稳定性

A highly efficient methodology for the preparation of N-methoxycarbazoles and the total synthesis of 3,3'-[oxybis(methylene)]bis(9-methoxy-9H-carbazole)

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Frontiers of Chemical Science and Engineering 2021年第3期15卷 679-686页

作者： yongxin zhang Shucheng Wang Yaodong Huang Key Laboratory of Systems Bioengineering(Ministry of Education) School of Chemical Engineering and TechnologyTianjin UniversityTianjin 300350China

A convenient and highly efficient method is described for the synthesis of N-methoxycarbazole derivatives,including those with sterically demanding,benzannulated,or strongly electron-donating or-withdrawing *** N-methoxycarbazole derivatives were directly prepared in good-to-moderate yields by the Pd_(2)(dba)_(3)CHCl_(3)/9,9-dimethyl-4,5-bis(diphenylphosphino)xanthene-catalyzed reactions of the corresponding dibromobiphenyl compounds and *** on this methodology,the first total synthesis of 3,3′-[oxybis(methylene)]bis(9-methoxy-9H-carbazole),an antimicrobial dimeric carbazole alkaloid previously isolated from the stem bark of Murraya koenigii,was achieved in 18% yield over seven steps from 1,2-dibromobenzene.

关键词： N-methoxyl carbazole dimeric N-methoxyl carbazole alkaloid total synthesis double N-arylation of methoxyamine

Widespread and active piezotolerant microorganisms mediate phenolic compound degradation under high hydrostatic pressure in hadal trenches

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Marine Life Science & Technology 2024年第2期6卷 331-348页

作者： Hao Ling yongxin Lv Yu zhang Ning‑Yi Zhou Ying Xu State Key Laboratory of Microbial Metabolism Joint International Research Laboratory of Metabolic and Developmental Sciences and School of Life Sciences and BiotechnologyShanghai Jiao Tong UniversityShanghai 200240China School of Oceanography Shanghai Jiao Tong UniversityShanghai 200240China State Key of Laboratory of Ocean Engineering Shanghai Jiao Tong UniversityShanghai 200240China

Phenolic compounds,as well as other aromatic compounds,have been reported to be abundant in hadal *** high-throughput sequencing studies have hinted at the potential of hadal microbes to degrade these compounds,direct microbiological,genetic and biochemical evidence under in situ pressures remain ***,a microbial consortium and a pure culture of Pseudomonas,newly isolated from Mariana Trench sediments,efficiently degraded phenol under pressures up to 70 and 60 MPa,respectively,with concomitant increase in *** analyzing a high-pressure(70 MPa)culture metatranscriptome,not only was the entire range of metabolic processes under high pressure generated,but also genes encod-ing complete phenol degradation via ortho-and meta-cleavage pathways were *** isolate of Pseudomonas also contained genes encoding the complete degradation *** transcribed genes(dmpKLMNOP_(sed))were functionally identified to encode a multicomponent hydroxylase catalyzing the hydroxylation of phenol and its methylated derivatives by heterogeneous *** addition,key catabolic genes identified in the metatranscriptome of the high-pressure cultures and genomes of bacterial isolates were found to be all widely distributed in 22 published hadal microbial *** microbiological,genetic,bioinformatics,and biochemical levels,this study found that microorganisms widely found in hadal trenches were able to effectively drive phenolic compound degradation under high hydrostatic *** information will bridge a knowledge gap concerning the microbial aromatics degradation within hadal trenches.

关键词： Hadal trench High hydrostatic pressure Phenolic compounds degradation Piezotolerant microorganisms Widespread distribution