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Pushing the limits of microwave absorption capability of carbon fiber in fabric design based on genetic algorithm

Journal of Advanced Ceramics 2023年第2期12卷 329-340页

作者： yuhao LIU Xiaoxiao HUANG Xu YAN Long XIA Tao ZHANG Jiahao sun Yanan LIU Yu ZHOU State Key Laboratory of Advanced Welding and Joining Harbin Institute of TechnologyHarbin 150001China School of Materials Science and Engineering Harbin Institute of TechnologyHarbin 150001China Beijing Institute of Radio Measurement China Aerospace Science and Industry Corporation LimitedBeijing 100854China School of Materials Science and Engineering Harbin Institute of TechnologyWeihaiWeihai 264209China

The field of electromagnetic wave absorption(EWA)requires the adaptability,tenability,and multifunction of high-performance materials in the future.The design and preparation of EWA materials aiming at performance requirements is the latest research hotspot.Here,a performancedriven strategy for simultaneously coordinating different target performances was proposed to optimize the structure of the periodical long continuous carbon/glass fiber fabric(PCGF)materials through algorithm and simulation.The optimized structure of the PCGF not only improves the impedance matching,but also introduces the induced orientation effect for a high cooperative loss of conductivity,resonance,and periodic structure.The flexible PCGF shows a broad effective absorption bandwidth(EAB)of 32.7 GHz covering a part of the C-band and the whole X-,Ku-,K-,and Ka-bands with a thickness(d)of only 0.92 mm and a density of 5.6×10^(−4) kg·cm^(−3).This highly designable fabric is promising for the EWA practical application owing to integrating the characteristics of good flexibility,acid and alkali resistance,bending resistance,excellent mechanical properties,and easy large-scale preparation.

关键词： broadband microwave absorption carbon fiber impedance matching periodical long continuous carbon/glass fiber fabric(PCGF) multiple loss mechanism

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基于ADAMS的混凝土振动搅拌机振动特性分析

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技术与市场 2024年第4期31卷 132-136页

作者：孙博士杜辉辉周昱豪黄益之长安大学道路施工技术与装备教育部重点实验室陕西西安710064

为研究混凝土振动搅拌机的振动特性,通过三维建模建立单端偏心激振搅拌装置的实体模型,通过机械系统动力学自动分析(ADAMS)仿真,分析了在不同振动参数下振动系统、搅拌系统等结构上的振动分布规律。结果表明:搅拌轴振动特性符合圆锥振... 详细信息

为研究混凝土振动搅拌机的振动特性,通过三维建模建立单端偏心激振搅拌装置的实体模型,通过机械系统动力学自动分析(ADAMS)仿真,分析了在不同振动参数下振动系统、搅拌系统等结构上的振动分布规律。结果表明:搅拌轴振动特性符合圆锥振动分布规律,呈现“两边大,中间小”的振动规律,振动参数对两轴上振动强度影响较大。研究可为振动搅拌系统振动参数的合理取值提供一定参考。

关键词：混凝土振动搅拌机振动特性动力学仿真振动强度

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大规模可调节资源多级聚合参与互动响应数据需求及潜力分析方法

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四川电力技术 2024年第1期47卷 28-34,71页

作者：肖钰皓李科苏军霍耀冉孙裕策张曦元国网四川省电力公司信息通信公司四川成都610041 四川科锐得电力通信技术有限公司四川成都610041 天津大学电气自动化与信息工程学院天津300072

充分调动多类型的需求侧资源参与电力系统供需互动,是促进新能源消纳,保障电网安全稳定运行的重要措施。针对区域大规模可调节资源多级聚合参与电网互动响应需求,给出了负荷侧资源的分层分级调控系统架构以及可调节负荷信息交互融合方式... 详细信息

充分调动多类型的需求侧资源参与电力系统供需互动,是促进新能源消纳,保障电网安全稳定运行的重要措施。针对区域大规模可调节资源多级聚合参与电网互动响应需求,给出了负荷侧资源的分层分级调控系统架构以及可调节负荷信息交互融合方式;然后,分析了可调节资源参与互动通信系统性能需求和动态互动决策的数据需求,提出了一种规模化可调节资源多级聚合响应的互动潜力分析方法,支撑多类资源互动响应和优化管控;最后,通过算例分析验证了所提方法的有效性。

关键词：新型电力系统可调节资源互动响应潜力分析方法

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Compound from Magnolia officinalis Ameliorates White Matter Injury by Promoting Oligodendrocyte Maturation in Chronic Cerebral Ischemia Models

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Neuroscience Bulletin 2023年第10期39卷 1497-1511页

作者： Zhi Zhang Xin Shu Qian Cao Lushan Xu Zibu Wang Chenggang Li Shengnan Xia Pengfei Shao Xinyu Bao Liang sun yuhao Xu Yun Xu Department of Neurology Nanjing Drum Tower Hospital Clinical College of Traditional Chinese and Western MedicineNanjing University of Chinese MedicineNanjing 210008China Department of Neurology Nanjing Drum Tower HospitalAfliated Hospital of Medical School and State Key Laboratory of Pharmaceutical Biotechnology and Institute of Translational Medicine for Brain Critical DiseasesNanjing UniversityNanjing 210008China Jiangsu Key Laboratory for Molecular Medicine Medical School of Nanjing UniversityNanjing 210008China Jiangsu Provincial Key Discipline of Neurology Nanjing 210008China Nanjing Neurology Medical Center Nanjing 210008China

Chronic cerebral hypoperfusion leads to white matter injury(WMI),which subsequently causes neurodegeneration and even cognitive impairment.However,due to the lack of treatment specifically for WMI,novel recognized and effective therapeutic strategies are urgently needed.In this study,we found that honokiol and magnolol,two compounds derived from Magnolia officinalis,significantly facilitated the differentiation of primary oligodendrocyte precursor cells(OPCs)into mature oligodendrocytes,with a more prominent effect of the former compound.Moreover,our results demonstrated that honokiol treatment improved myelin injury,induced mature oligodendrocyte protein expression,attenuated cognitive decline,promoted oligodendrocyte regeneration,and inhibited astrocytic activation in the bilateral carotid artery stenosis model.Mechanistically,honokiol increased the phosphorylation of serine/threonine kinase(Akt)and mammalian target of rapamycin(mTOR)by activating cannabinoid receptor 1 during OPC differentiation.Collectively,our study indicates that honokiol might serve as a potential treatment for WMI in chronic cerebral ischemia.

关键词： Honokiol White matter injury Oligodendrocyte Vascular dementia

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miR-140-3p在大鳞副泥鳅雌雄性腺中的差异表达和调控功能的研究

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家畜生态学报 2024年第1期45卷 16-21,52页

作者：吕晓洁王伟伟郝瑞荣刘少贞陈越杨琼李欣欣谢宇浩孙睿山西农业大学动物科学学院山西太谷030801 沁水县现代农业发展中心山西沁水048200

miR-140-3p是在不同物种性腺组织中广泛表达的一种miRNA。本研究利用qRT-PCR方法检测miR-140-3p在大鳞副泥鳅性腺中的雌雄表达差异并预测其生物学功能。结果显示:miR-140-3p在大鳞副泥鳅雌雄鱼的性腺组织中均有表达,且精巢中的表达量显... 详细信息

miR-140-3p是在不同物种性腺组织中广泛表达的一种miRNA。本研究利用qRT-PCR方法检测miR-140-3p在大鳞副泥鳅性腺中的雌雄表达差异并预测其生物学功能。结果显示:miR-140-3p在大鳞副泥鳅雌雄鱼的性腺组织中均有表达,且精巢中的表达量显著高于卵巢(P<0.01);KEGG pathway分析表明,靶基因CPEB4和GDF9参与卵母细胞成熟分化过程,富集在与性腺发育、繁殖功能相关的孕激素介导卵母细胞成熟通路、卵母细胞减数分裂通路、卵巢类固醇生成通路。荧光定量结果显示CPEB4和GDF9在卵巢中表达量显著高于精巢(P<0.01),且表达量与miR-140-3p的表达呈显著负相关,说明miR-140-3p和CPEB4、GDF9具有潜在的靶标关系。这为进一步探索miR-140-3p在鱼类性腺发育和繁殖过程中的作用奠定了基础。

关键词：大鳞副泥鳅 MiR-140-3p 性腺

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Microbial community coexisting with harmful alga Karenia mikimotoi and microbial control of algal bloom in laboratory

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Journal of Oceanology and Limnology 2022年第3期40卷 1027-1038页

作者： Li sun Peike GAO Yu LI Chao WANG Ning DING Junfeng CHEN yuhao SONG Chunchen LIU Lun SONG Renjun WANG College of Life Sciences Qufu Normal UniversityQufu 273165China Key Laboratory of Marine Biological Resources and Ecology Liaoning Ocean and Fisheries Science Research InstituteDalian 116023China

Algicidal bacteria have been frequently isolated from algal blooming areas.However,knowledge regarding the microbial communities coexisting with microalgae and their potential application in preventing harmful algal blooms(HABs)is limited.In this study,we investigated the composition of the microbial community coexisting with harmful alga Karenia mikimotoi and its responses to algal control via nutrient stimulation or by adding algicidal strain in microcosms.The microorganisms inhabiting the K.mikimotoi culture consisted of 24 identifi ed phyla,including dominant Proteobacteria(relative abundance 76.24%±7.28%)and Bacteroidetes(22.67%±8.32%).Rhodobacteraceae,Phaeodactylibacter,and Maritimibacter predominated during the algal cultivation.Both the added nutrient and fermentation broth of algicidal strain Pseudoalteromonas QF1 caused a massive death of K.mikimotoi and substantial changes in the coexisting microbial community,in which Rhodobacteraceae and Phaeodactylibacter signifi cantly decreased,while Halomonas and Alteromonas increased.Core operational taxonomic units(OTUs)analysis indicated that 13 OTUs belonging to Rhodobacteraceae,Maritimibacter,Marivita,Nisaea,Phaeodactylibacter,Citreicella,Halomonas,Alteromonas,Marinobacter,Muricauda,and Pseudoalteromonas dominated the changes of the microbial communities observed in the K.mikimotoi culture with or without treatments.Collectively,this study indicated that microbial community inhabiting K.mikimotoi culture includes potential algicidal bacteria,and improves our knowledge about microbial community succession during biocontrol of K.mikimotoi via nutrient stimulation or by adding isolated algicidal strains.

关键词： Karenia mikimotoi microbial community nutrient stimulation algicidal bacteria Pseudoalteromonas

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3D genome organization in the central nervous system,implications for neuropsychological disorders

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Journal of Genetics and Genomics 2021年第12期48卷 1045-1056页

作者： Daijing sun Jie Weng yuhao Dong Yan Jiang Institutes of Brain Science State Key Laboratory of Medical NeurobiologyMOE Frontier Center for Brain ScienceFudan UniversityShanghai 200032China

Chromosomes in eukaryotic cell nuclei are highly compacted and finely organized into hierarchical threedimensional(3 D) configuration. In recent years, scientists have gained deeper understandings of 3 D genome structures and revealed novel evidence linking 3 D genome organization to various important cell events on the molecular level. Most importantly, alteration of 3 D genome architecture has emerged as an intriguing higher order mechanism that connects disease-related genetic variants in multiple heterogenous and polygenic neuropsychological disorders, delivering novel insights into the etiology. In this review, we provide a brief overview of the hierarchical structures of 3 D genome and two proposed regulatory models,loop extrusion and phase separation. We then focus on recent Hi-C data in the central nervous system and discuss 3 D genome alterations during normal brain development and in mature neurons. Most importantly,we make a comprehensive review on current knowledge and discuss the role of 3 D genome in multiple neuropsychological disorders, including schizophrenia, repeat expansion disorders, 22 q11 deletion syndrome, and others.

关键词： 3D genome Chromosome conformation Hi-C Central nervous system Neuropsychological disorders

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Robust Energy Management Approach for a Microgrid Considering Uncertainties

Robust Energy Management Approach for a Microgrid Considerin...

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第40届中国控制会议

作者： Tengpeng Chen yuhao Cao Xuebing Chen yuhao sun Shenzhen Research Institute of Xiamen University Department of Instrumental and Electrical Engineering Xiamen University sungrow (Shanghai) Co. Ltd. National Centre for International Research on Photoelectric and Energy Materials Yunnan University

Uncertainties of renewable energy sources and load demand have a significant effect on the microgrid operation. In this paper, a robust optimal energy management approach is proposed for a grid-connected microgrid where the adjustable uncertain sets are used to represent uncertainties. A novel statistic index is developed to evaluate the effectiveness of the robust optimization and obtain reasonable model parameters. Moreover, the optimal economic cost and the least environmental pollution are achieved simultaneously. Simulation results in different scenarios are given to verify the effectiveness of the robust optimization approach.

关键词： Microgrid Energy management Uncertainty Robust optimization Environmental sustainability

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Three Kinds of Discrete Formulae for the Caputo Fractional Derivative

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Communications on Applied Mathematics and Computation 2023年第4期5卷 1446-1468页

作者： Zhengnan Dong Enyu Fan Ao Shen yuhao Su Department of Mathematics Shanghai UniversityShanghai200444China

In this paper,three kinds of discrete formulae for the Caputo fractional derivative are studied,including the modified L1 discretisation forα∈(O,1),and L2 discretisation and L2C discretisation forα∈(1,2).The truncation error estimates and the properties of the coeffcients of all these discretisations are analysed in more detail.Finally,the theoretical analyses areverifiedby thenumerical examples.

关键词： Caputo fractional derivative Modified L1 discretisation L2 discretisation L2C discretisation Truncation error

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多卫星星座对时变重力场反演精度和时空分辨率影响的模拟研究

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地球物理学报 2024年第6期67卷 2125-2140页

作者：郭丁昊王长青朱紫彤熊宇昊杨萌钟敏沈云中陈秋杰冯伟中山大学测绘科学与技术学院广东珠海519082 极地环境立体观测与应用教育部重点实验室(中山大学) 广东珠海519082 大地测量与地球动力学国家重点实验室中国科学院精密测量科学与技术创新研究院武汉430071 中国科学院大学北京100049 同济大学测绘与地理信息学院上海200092

近二十年,GRACE/GRACE-FO实现了对地球时变重力场的连续监测.但受单极轨轨道配置、背景模型误差和载荷精度的限制,其时空分辨率和观测精度不足以探测短时间、小尺度的质量变化信号.以欧空局MAGIC(Mass Change and Geoscience Internatio... 详细信息

近二十年,GRACE/GRACE-FO实现了对地球时变重力场的连续监测.但受单极轨轨道配置、背景模型误差和载荷精度的限制,其时空分辨率和观测精度不足以探测短时间、小尺度的质量变化信号.以欧空局MAGIC(Mass Change and Geoscience International Constellation)和中山大学“天琴计划”为代表的下一代重力计划将通过多对卫星星座和新一代高精度载荷来提高时变重力场反演精度.考虑到未来多项卫星重力计划和当前GRACE-FO、中国重力卫星同期观测的可能,本文基于动力学方法对双极轨、Bender、极轨+Bender和双Bender四种星座构型进行了闭环仿真模拟,并对其月尺度解和1~3天短周期解进行评估.结果表明:(1)相较于单极轨,双极轨、Bender、极轨+Bender和双Bender四种星座的月尺度时变重力场恢复精度分别提高了30.7%、85.7%、85.9%和89.5%.(2)多对卫星星座能够恢复高空间分辨率的短周期时变重力场解,且在时间序列中能够保留地球物理信号的高频部分.其中双Bender能够恢复40阶的1天解时变重力场,极轨+Bender能够恢复40阶的2天解时变重力场,Bender能够恢复40阶的3天解时变重力场.

关键词：下一代重力计划卫星编队闭环模拟

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