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Improved Particle Swarm Optimization for Parameter Identification of Permanent Magnet Synchronous Motor

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Computers, Materials & Continua 2024年第5期79卷 2187-2207页

作者： Shuai Zhou Dazhi Wang Yongliang Ni Keling Song yanming li School of Information Science and Engineering Northeastern UniversityShenyang110819China China Northern Vehicle Research Institute Beijing100072China

In the process of identifying parameters for a permanent magnet synchronous motor,the particle swarm optimization method is prone to being stuck in local optima in the later stages of iteration,resulting in low parameter *** work proposes a fuzzy particle swarm optimization approach based on the transformation function and the filled *** approach addresses the topic of particle swarmoptimization in parameter identification from two ***,the algorithm uses a transformation function to change the form of the fitness function without changing the position of the extreme point of the fitness function,making the extreme point of the fitness function more prominent and improving the algorithm’s search ability while reducing the algorithm’s computational ***,on the basis of themulti-loop fuzzy control systembased onmultiplemembership functions,it is merged with the filled function to improve the algorithm’s capacity to skip out of the local optimal *** approach can be used to identify the parameters of permanent magnet synchronous motors by sampling only the stator current,voltage,and speed *** simulation results show that the method can effectively identify the electrical parameters of a permanent magnet synchronous motor,and it has superior global convergence performance and robustness.

关键词： Transformation function filled function fuzzy particle swarm optimization algorithm permanent magnet synchronous motor parameter identification

Experts’Consensus on the Management of Respiratory Disease Syndemic

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China CDC weekly 2024年第8期6卷 131-138页

作者： Weizhong Yang Zhongjie li Ting Yang yanming li Zhengde Xie Luzhao Feng Zhibin Peng Jue liu School of Population Medicine and Public Health Chinese Academy of Medical Sciences and Peking Union Medical CollegeBeijingChina State Key Laboratory of Respiratory Health and Multimorbidity BeijingChina Key Laboratory of Pathogen Infection Prevention and Control Peking Union Medical CollegeMinistry of EducationBeijingChina National Center for Respiratory Diseases State Key Laboratory of Respiratory Health and MultimorbidityNational Clinical Research Center for Respiratory DiseasesInstitute of Respiratory MedicineChinese Academy of Medical SciencesDepartment of Pulmonary and Critical Care MedicineCenter of Respiratory MedicineChina-Japan Friendship HospitalBeijingChina Department of Pulmonary and Critical Care Medicine National Center of GerontologyBeijing HospitalInstitute of Geriatric MedicineChinese Academy of Medical SciencesBeijingChina Beijing Key Laboratory of Pediatric Respiratory Infection Diseases Key Laboratory of Major Diseases in ChildrenMinistry of EducationNational Clinical Research Center for Respiratory DiseasesResearch Unit of Critical Infection in ChildrenChinese Academy of Medical Sciences2019RU016National Key Discipline of Pediatrics(Capital Medical University)Beijing Pediatric Research InstituteBeijing Children's HospitalCapital Medical UniversityNational Center for Children's HealthBeijingChina Chinese Center for Disease Control and Prevention BeijingChina Department of Epidemiology and Biostatistics School of PublicHealthKey Laboratory of Epidemiology of Major DiseasesMinistry of EducationPeking University Health Science Center-Weifang Joint Research Center for Maternal and Child HealthPeking UniversityBeijingChina

The global burden of respiratory diseases is a significant and increasing threat to individuals *** 2017,there were 544.9 million cases of chronic respiratory diseases,a 39.8%increase since 1990(1).These diseases were the third leading cause of global mortality in 2017,accounting for 7.0%of all deaths,an 18.0%increase compared to 1990.

关键词： diseases respiratory mortality

Electrolyte Effect on Photoetching of Gallium Nitride

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Nanomanufacturing and Metrology 2024年第1期7卷 61-74页

作者： Huiqiang liang Zhenghao Wei Jiongchong Fang yanming li Changli li Zhirun Xie Yun Hau Ng Guosong Zeng Shenzhen Key Laboratory of Intelligent Robotics and Flexible Manufacturing Systems Southern University of Science and TechnologyShenzhen 518055People’s Republic of China Department of Mechanical and Energy Engineering Southern University of Science and TechnologyShenzhen 518055People’s Republic of China School of Materials Sun Yat-Sen UniversityGuangzhou 510275People’s Republic of China School of Energy and Environment City University of Hong KongKowloon 999077Hong Kong SARPeople’s Republic of China City University of Hong Kong Shenzhen Research Institute Shenzhen Hi-Tech Industrial ParkNanshan DistrictShenzhen 518000People’s Republic of China SUSTech Energy Institute for Carbon Neutrality Southern University of Science and TechnologyShenzhen 518055People’s Republic of China

The limited material removal rate of conventional chemical mechanical polishing(CMP)significantly hinders the fabrica-tion efficiency and surface quality,thereby preventing the development of gallium nitride(GaN)-based ***,the incorporation of photoelectrochemistry in CMP has garnered increasing attention because of its potential to enhance the quality and efficiency of the GaN ***,a considerable gap still exists in the comprehensive understanding of the specific photoelectrochemical(PEC)behavior of ***,we report the influence of the electrolyte on the PEC etching of *** acids and bases were tested,with their pH being carefully *** concentrations of the cations and anions were also *** results showed that photocorrosion/photoetching was more pronounced in sulfuric acid,phosphoric acid,and nitric acid environments than in alkaline environments,but it was less pronounced in hydrochloric ***,the effects of pH and anion concentration on photoetching were investigated,and the results revealed that pho-toetching in acidic environments weakened with increasing pH levels and diminished with increasing sulfate *** underlying reasons contributing to this observation were *** findings provide ideas for improving the pho-toetching efficiency of GaN,thereby enriching the photoelectrochemical mechanical polishing(PECMP)technology of GaN.

关键词： GaN Photoelectrochemistry Photoetching pH

Nanoplastics promote the dissemination of antibiotic resistance genes and diversify their bacterial hosts in soil

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Eco-Environment & Health 2024年第1期3卷 1-10页

作者： lijuan liu Yuanze Sun Shaoting Du yanming li Jie Wang Key Laboratory of Pollution Exposure and Health Intervention of Zhejiang Province Interdisciplinary Research Academy(IRA)Zhejiang Shuren UniversityHangzhou 310015China Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation College of Resources and Environmental SciencesChina Agricultural UniversityBeijing 100193China

The wide application of plastics has led to the ubiquitous presence of nanoplastics and microplastics in terrestrial ***,few studies have focused on the mechanism underlying the effects of plastic particles on soil microbiomes and resistomes,especially the differences between nanoplastics and *** study investigated the microbiome and resistome in soil exposed to polystyrene microplastics(mPS)or nanoplastics(nPS)through 16S rRNA and shotgun metagenomic *** microbial communities were observed between mPS and nPS exposure groups,and nPS exposure significantly changed the bacterial composition even at the lowest amended rate(0.01%,w/w).The abundance of antibiotic resistance genes(ARGs)in nPS exposure(1%)was 0.26 copies per cell,significantly higher than that in control(0.21 copies per cell)and mPS exposure groups(0.21 copies per cell).It was observed that nanoplastics,bacterial community,and mobile genetic elements(MGEs)directly affected the ARG abundance in nPS exposure groups,while in mPS exposure groups,only MGEs directly induced the change of *** was the predominant host for multidrug in the control and mPS exposure,whereas the primary host was changed to Bacillus in nPS ***,exposure to nPS induced several bacterial hosts to exhibit possible multi-antibiotic resistance *** results indicated that the effects of plastic particles on the soil microbial community were size-dependent,and nano-sized plastic particles exhibited more substantial *** microplastics and nanoplastics promoted ARG transfer and diversified their bacterial *** findings bear implications for the regulation of plastic waste and ARGs.

关键词： Microplastics Nanoplastics Metagenomics Bacterial hosts Antibiotic resistance genes

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病毒感染是否可以引起感染中毒症

中华结核和呼吸杂志 2024年第10期47卷 913-917页

作者：翁剑真李燕明北京医院呼吸与危重症医学科国家老年医学中心北京

感染中毒症是一类因宿主对感染的反应失衡而导致危及生命的器官功能障碍的临床综合征。重症病毒感染也可引起感染中毒症, 其与细菌引起的感染中毒症在病生理机制和管理策略的本质上相似, 但在细节上又略有不同。去除诱因和恢复免疫稳态...

感染中毒症是一类因宿主对感染的反应失衡而导致危及生命的器官功能障碍的临床综合征。重症病毒感染也可引起感染中毒症, 其与细菌引起的感染中毒症在病生理机制和管理策略的本质上相似, 但在细节上又略有不同。去除诱因和恢复免疫稳态是打破感染中毒症恶性循环的关键, 因此明确病原的检查手段和针对性抗感染药物的研发, 以及宿主免疫状态的动态评估(合适的生物标志物或评估模型)以及基于免疫状态的个体化免疫治疗是未来重要的研究方向。

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园林绿化垃圾堆肥化处理的优化策略研究

中国农业大学学报 2024年第3期29卷 63-78页

作者：孙玉鑫常瑞雪李季李彦明中国农业大学资源与环境学院北京100193 中国农业大学有机循环研究院(苏州) 江苏苏州215100

为探究园林绿化垃圾堆肥促腐减排的优化策略,以中国学术期刊网络出版总库(CNKI)和Web of Science核心合集数据库为研究基础,对园林绿化垃圾堆肥的相关文献进行梳理和总结,探讨了园林绿化垃圾的时空特征、理化特性及其堆肥技术面临的挑战... 详细信息

为探究园林绿化垃圾堆肥促腐减排的优化策略,以中国学术期刊网络出版总库(CNKI)和Web of Science核心合集数据库为研究基础,对园林绿化垃圾堆肥的相关文献进行梳理和总结,探讨了园林绿化垃圾的时空特征、理化特性及其堆肥技术面临的挑战,并从园林绿化垃圾的预处理方法、堆肥物料营养结构调控、堆肥菌群功能调控及堆肥工程工艺参数优化等方面,综述了园林绿化垃圾堆肥增效促腐与提质减排的优化策略。结果表明:园林绿化垃圾堆肥时,应根据原料特性、操作成本和堆肥应用场景等因素选用合适的预处理手段或物料调配策略,接种特定功能微生物并优化微生物菌剂接种手段,合理选用堆肥工程工艺技术,以加快堆肥腐殖化进程,减少恶臭气体排放。为今后园林绿化垃圾高温好氧堆肥技术的创新提出了研发攻关方向,以期加快园林绿化垃圾快速降解技术的提升,为我国城市园林绿化垃圾处理和资源化利用试点建设提供支撑。

关键词：园林绿化垃圾堆肥优化策略微生物物料调配

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某化工企业环境风险源辨识与风险评估研究

山西化工 2024年第3期44卷 192-194页

作者：李彦明吕梁市环境科学研究所山西吕梁033000

介绍了某化工企业概况,辨识了该化工企业环境风险源,并进行了突发环境事件情景预测和危害后果分析,在此基础上,提出了该化工企业风险防范措施,以期提高企业风险应对能力。

关键词：风险源辨识风险评估风险防范化工企业

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生产突发水污染中铜(Ⅱ)的应急快速检测

山西化工 2024年第8期44卷 102-103,113页

作者：李彦明吕梁市环境科学研究所山西吕梁033000

为进一步探究冶金行业突发水污染条件下的二价铜离子应急快速检测方法,以裸眼比色识别为目标,设计一种基于巯基、磺酸基、氨基等多官能团化的天然高分壳聚糖基底复合材料的快速检测材料用于实际测试。实验测试结果显示,该材料在冶金行... 详细信息

为进一步探究冶金行业突发水污染条件下的二价铜离子应急快速检测方法,以裸眼比色识别为目标,设计一种基于巯基、磺酸基、氨基等多官能团化的天然高分壳聚糖基底复合材料的快速检测材料用于实际测试。实验测试结果显示,该材料在冶金行业的生产突发水污染典型事件中,其检测识别能力、灵敏度、特异性检测三方面均具有一定优势,初步推断其适用于生产突发水污染中铜(Ⅱ)的应急快速检测。

关键词：突发水污染铜离子应急快速检测检测方法

墩顶转体法施工的大跨度曲线钢桁梁桥总体设计及创新——以国道109新线高速公路安家庄特大桥主桥设计为例

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铁道标准设计 2024年第3期68卷 1-7,55页

作者：李艳明徐升桥彭岚平李辉中铁工程设计咨询集团有限公司北京100055 中国中铁桥梁专业研发中心-桥梁标准设计分中心北京100055

国道109新线高速公路安家庄特大桥为全线的控制性工程,左右幅主桥分别位于半径1600 m和1500 m的圆曲线上,依次跨越丰沙铁路、永定河和现状109国道,桥梁施工安全、河道防洪和环保要求均较高。为解决上跨铁路需采用转体法施工以及桥墩阻... 详细信息

国道109新线高速公路安家庄特大桥为全线的控制性工程,左右幅主桥分别位于半径1600 m和1500 m的圆曲线上,依次跨越丰沙铁路、永定河和现状109国道,桥梁施工安全、河道防洪和环保要求均较高。为解决上跨铁路需采用转体法施工以及桥墩阻水比偏高的问题,创新提出了大跨度曲线钢桁梁桥墩顶转体法施工以及大直径厚壁钢管混凝土桥墩的设计方案,左右幅主桥分别采用(248.95+248.95)m钢桁斜拉桥和(171.95+171+75.25)m连续钢桁梁,转体长度分别为(248+248)m和(171+171)m,水中墩采用钢管混凝土桥墩。结合桥位处相关工程建设条件,对桥梁孔跨布置、桥式方案、水中墩结构的选择依据进行分析,简要介绍主桥上部结构、下部结构及基础、转体系统等主要设计内容。该桥突破钢桁梁不宜采用墩顶转体施工的技术瓶颈,扩大了连续钢桁梁桥和墩顶转体技术的使用范围;采用大直径厚壁钢管混凝土桥墩,有效降低了墩柱截面尺寸,拓宽了钢管混凝土结构的应用范围;大跨度曲线钢桁梁构造及受力特性较为复杂,采用BIM正向设计技术,实现了复杂结构信息和设计意图的精准表达,提高了设计效率。

关键词：高速公路公路桥曲线桥钢桁斜拉桥连续钢桁梁墩顶转体法钢管混凝土桥墩 BIM正向设计总体设计