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Transient Stability Analysis of Converter-based Islanded Microgrids Based on Iterative Equal Area Criterion Considering Reactive Power Loop Dynamics and Varying Damping

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Journal of Modern Power Systems and Clean Energy 2024年第4期12卷 1170-1182页

作者： Xilin Li Jingyi Zhang zhen tian Xiaoming Zha Wei Wang Meng Huang Chong Shao Hubei Key Laboratory of Power Equipment&System Security for Integrated Energy School of Electrical Engineering and AutomationWuhan UniversityWuhanChina NARI Technology Co. Ltd.NanjingChina State Grid Gansu Electric Power Company LanzhouChina

With the rapid increase in the installed capacity of renewable energy in modern power systems,the stable operation of power systems with considerable power electronic equipment requires further *** converter-based islanded mi-crogrid(CIM)systems equipped with grid-following(GFL)and grid-forming(GFM)voltage-source converters(VSCs),it is chal-lenging to maintain stability due to the mutual coupling effects between different VSCs and the loss of voltage and frequency sup-port from the power *** previous studies,quantitative transient stability analysis was primarily used to assess the active power loop of ***,frequency and voltage dy-namics are found to be strongly coupled,which strongly affects the estimation result of stability *** addition,the vary-ing damping terms have not been fully *** bridge these gaps,this paper investigates the transient stability of CIM consid-ering reactive power loop dynamics and varying ***,an accuracy-enhanced nonlinear model of the CIM is derived based on the effects of reactive power loop and post-disturbance frequency jump *** these effects will elimi-nates the risk of *** reactive power loop dynamics make the model coefficients be no longer constant and thus vary with the power *** evaluate quantitatively the effects of re-active power loop and varying damping on the transient stability of CIM,an iterative criterion based on the equal area criterion theory is *** addition,the effects of parameters on the stable boundary of power system are analyzed,and the dynamic interaction mechanisms are *** and experiment results verify the merits of the proposed method.

关键词： Transient stability converter iterative criterion reactive power loop post-disturbance frequency jump

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Regulating ion transport behaviors toward dendrite-free potassium metal batteries:recent advances and perspectives

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Rare Metals 2024年第4期43卷 1435-1460页

作者： Lu-Kang Zhao Xuan-Wen Gao tian-zhen Ren Da Wang Da-Wei Wang Zhao-Meng Liu Hong Chen Wen-Bin Luo School of Metallurgy Northeastern UniversityShenyang110819China School of Chemical Engineering The University of New South WalesSydneyNSW2052Australia

With abundant potassium resources and high capacity,potassium metal batteries(PMBs)present a compelling option for the next generation of energy storage ***,PMBs suffer from an unstable anode interface caused by uncontrolled dendrite growth,which results in unsatisfactory cyclability and safety *** investigations suggest that significant progress has been made in enhancing the interfacial stability of *** various effective strategies for stabilizing interfaces can ultimately be attributed to the regulation of the sluggish ion transfer kinetics and irregular deposition,i.e.,the arrangement of ion transport behaviors at the *** modulation of ions transport rate and ions deposition directions makes it possible to obtain a dendrite-free and smooth deposition ***,the influencing factors and action mechanism of K^(+)interface transport behaviors are discussed to understand the nature of material design for constructing stable anode interfaces,including regulating the solvation and desolvation structures,accelerating K^(+)transport kinetics and controlling K^(+)deposition *** addition,the deficiencies and prospects of the research on electrolyte,separators and designed electrode involved in the manufacturing and testing and ion transport process of PMBs are *** review is expected to provide some possible directions for constructing dendrite-free interfaces in advanced PMBs-related research and offer significant insights for prospective experimental research and commercial applications.

关键词： Ion transport rate Ion transport direction Interface Potassium metal batteries Dendrites growth

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Coherent terahertz wave emission from laser-induced plasma in isotropic transparent solid dielectrics

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Chinese Optics Letters 2024年第7期22卷 121-125页

作者： Yuxuan Chen Yuhang He Chenyin Dai Xiangyu La zhen tian Jianming Dai Center for Terahertz Waves and School of Precision Instrument and Opto-electronics Engineering Tianjin UniversityTianjin 300072China

In this Letter,we employ fused silica and two types of optical glass as examples to investigate the coherent terahertz(THz)wave emission from laser-ionized isotropic transparent *** on the laser energy and incident angle dependences,we ascribe the THz emission to the ponderomotive force-induced dipole ***,our investigation on the dependence of THz amplitude on the laser pulse duration confirms the dominant role of avalanche ionization in solid *** THz emission can be utilized to indirectly monitor the ultrafast dynamics of carrier generation and motion during the laser ionization process of solid dielectrics.

关键词： terahertz wave emission laser-induced plasma laser-solid interaction ponderomotive force fused silica.

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Asymmetric frequency multiplexing topological devices based on a floating edge band

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Photonics Research 2024年第6期12卷 1201-1212页

作者： JIAJUN MA CHUNMEI OUYANG YUTING YANG DONGYANG WANG HONGYI LI LI NIU YI LIU QUAN XU YANFENG LI zhen tian JIAGUANG HAN WEILI ZHANG Center for Terahertz Waves and College of Precision Instrument and Optoelectronics Engineering and Key Laboratory of Optoelectronics Information and TechnologyTianjin UniversityTianjin 300072China School of Materials Science and Physics China University of Mining and TechnologyXuzhou 221116China Optoelectronics Research Centre University of SouthamptonSouthampton SO171BJUK Guangxi Key Laboratory of Optoelectronic Information Processing School of Optoelectronic EngineeringGuilin University of Electronic TechnologyGuilin 541004China School of Electrical and Computer Engineering Oklahoma State UniversityStillwaterOklahoma 74078USA

Topological photonics provides a platform for robust energy transport regardless of sharp corners and ***,the frequency multiplexing topological devices have attracted much attention due to the ability to separate optical signals by wavelength and hence the potential application in optical communication *** frequency multiplexing topological devices are generally based on the slow light ***,the resulting static local spatial mode or finely tuned flat band has zero-group velocity,making it difficult for both experimental excitation and channel ***,we propose and experimentally demonstrate an alternative prototype of asymmetric frequency multiplexing devices including a topological rainbow and frequency router based on floating topological edge mode(instead of localized ones);hence the multiple wavelength channels can be collectively excited with a point source and efficiently routed to separate output *** channel separation in our design is achieved by gradually tuning the band gap truncation on a topological edge band over a wide range of frequencies.A crucial feature lies in that the topological edge band is detached from bulk states and floating within the upper and lower photonic band *** interestingly,due to the sandwiched morphology of the edge band,the top and bottom band gaps will each truncate into transport channels that support topological propagation towards opposite directions,and the asymmetrical transportation is realized for the frequency multiplexing topological devices.

关键词： tuning floating hence

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Mitogenome-based phylogeny of mosquitoes(Diptera:Culicidae)

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Insect Science 2024年第2期31卷 599-612页

作者： De-Hong Chen Shu-Lin He Wen-Bo Fu zhen-tian Yan Yun-Jian Hu Huan Yuan Ming-Bin Wang Bin Chen Chongqing Key Laboratory of Vector Insects Institute of Entomology and Molecular BiologyChongqing Normal UniversityChongqingChina

Mosquitoes are of great medical significance as vectors of many deadly *** have been widely used in phylogenetic studies,but mitogenome knowledge within the family Culicidae is limited,and Culicidae phylogeny is far from *** this study,we surveyed the mitogenomes of 149 Culicidae species,including 7 newly sequenced *** analysis of 149 mosquito mitogenomes shows gene composition and order to be identical to that of an ancestral insect,and the AT bias,length variation,and codon usage are all consistent with that of other reported Dipteran *** analyses based on the DNA sequences of the 13 protein-coding genes from the 149 species robustly support the monophyly of the subfamily Anophelinae and the tribes Aedini,Culicini,Mansonini,Sabethini,and *** resolve ambiguous relationships between clades within the subfamily Culicinae,we performed topological tests and show that Aedini is a sister to Culicini and that Uranotaenini is a sister to(Mansonini)+(Toxorhynchitini+Sabethini).In addition,we estimated divergence times using a Bayesian relaxation clock based on the sequence data and 3 fossil calibration *** results show mosquitoes diverged during the Early Jurassic with massive Culicinae radiations during the Cretaceous,coincident with the emergence of angiosperms and the burst of mammals and ***,this study,which uses the largest number of Culicidae mitogenomes sequenced to date,comprehensively reveals the mitogenome characteristics and mitogenome-based phylogeny and divergence times of Culicidae,providing information for further studies on the mitogenome,phylogeny,evolution,and taxonomic revision of Culicidae.

关键词： characterization Culicidae evolution mitogenomes mosquitoes phylogeny

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柔性多功能Fe_(2)O_(3)/CC正极宿主实现高效吸附与催化多硫化物的锂硫电池

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新型炭材料（中英文） 2024年第2期39卷 345-353页

作者：田真薛磊磊丁红元中北大学材料科学与工程学院山西太原030051 中北大学先进能源材料与系统研究院山西太原030051 武汉第二船舶设计研究所湖北武汉430205

锂硫电池因其高能量密度和低成本而成为最有发展前景的电化学储能器件之一。然而,多硫化物的“穿梭效应”、硫导电率低是锂硫电池商业化面临的主要挑战。本工作中,以Fe(NO)_(3)·9H_(2)O为铁源,NH4F为表面活性剂,通过简单的水热及煅烧... 详细信息

锂硫电池因其高能量密度和低成本而成为最有发展前景的电化学储能器件之一。然而,多硫化物的“穿梭效应”、硫导电率低是锂硫电池商业化面临的主要挑战。本工作中,以Fe(NO)_(3)·9H_(2)O为铁源,NH4F为表面活性剂,通过简单的水热及煅烧处理制备了Fe_(2)O_(3)纳米棒修饰炭布(CC)的柔性Fe_(2)O_(3)/CC复合材料。其中,Fe_(2)O_(3)中介孔的存在有利于电解质的渗透和充放电过程中锂离子的传输和扩散,同时其密集阵列暴露出的丰富活性位点可以实现多硫化物的高效吸附和快速转化,降低多硫化物的穿梭效应。电化学分析显示:Fe_(2)O_(3)/CC正极在0.1 C(1 C=1672 mA g^(−1))的电流密度下具有1250 mAh g^(-1)的高放电比容量,经100圈循环后比容量保持在789 mAh g^(-1)。在2 C的倍率下循环1000圈后仍能达到576 mAh g^(-1)的放电比容量,容量保持率为70%,明显优于对比样品。因此,Fe_(2)O_(3)/CC能够很好地抑制多硫化物的穿梭,提高电池倍率性能和循环稳定性。

关键词：锂硫电池 Fe_(2)O_(3) 正极材料纳米棒

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多子阵SAS六自由度运动补偿与成像快速算法

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华中科技大学学报（自然科学版） 2024年第3期52卷 28-34页

作者：田振钟何平唐劲松海军工程大学电子工程学院湖北武汉430033

针对多子阵合成孔径声纳(SAS)六自由度运动误差补偿及逐点运动补偿算法效率低的问题,提出一种能够快速补偿方位空不变六自由度运动误差的多子阵SAS运动补偿与成像算法.建立方位空不变六自由度运动误差存在情形下的多子阵SAS双根号形式... 详细信息

针对多子阵合成孔径声纳(SAS)六自由度运动误差补偿及逐点运动补偿算法效率低的问题,提出一种能够快速补偿方位空不变六自由度运动误差的多子阵SAS运动补偿与成像算法.建立方位空不变六自由度运动误差存在情形下的多子阵SAS双根号形式距离历程,利用泰勒级数展开对双根号形式距离历程进行近似并保留至方位时间的四阶项,利用级数反演方法推导出严格解析的点目标响应二维谱,进而提出能够快速实现方位空不变六自由度运动误差补偿与高分辨成像的距离多普勒算法.仿真试验和实测数据成像表明了所提算法的有效性.

关键词：合成孔径声纳运动补偿成像技术距离多普勒算法六自由度运动误差

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生长分化因子5与代谢性疾病

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生物化学与生物物理进展 2024年第3期51卷 564-574页

作者：王天幕任无竞田振军陕西师范大学体育学院暨运动生物学研究所西安710119

生长分化因子5(growth/differentiation factor-5,GDF-5)属于转化生长因子β(transforming growth factor-β,TGF-β)家族,在骨、软骨、心脏、大脑、肾脏、骨骼肌和肌腱、肝脏以及脂肪等多个器官组织中表达。GDF-5与其受体BMPR-I/BMPR-II结合,激活Smad1/5/8、PI3K/Akt、p38-MAPK等信号,发挥促进细胞增殖分化、减少氧化应激损伤、细胞凋亡和组织纤维化等生物学功能。目前针对GDF-5的研究多聚焦在骨、软骨与肌腱的生长和修复等方面,而在其他器官中的生物学作用鲜有报道。因此,本文通过梳理和总结近年来GDF-5与代谢性疾病的研究进展,为GDF-5在改善代谢性疾病防治提供新的见解和理论依据。

关键词：代谢性疾病生长分化因子5 BMP-14 炎症氧化应激

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时序InSAR与GNSS联合约束下的亚东-谷露断裂运动特征

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测绘学报 2024年第5期53卷 933-945页

作者：周苍海田镇石震哈衣那尔·托坎长安大学地质工程与测绘学院陕西西安710064

亚东-谷露断裂作为青藏高原东南部自新生代以来规模最大、活动性最强的拉张断裂,在青藏高原的构造变形与物质运移等过程中起着重要的调节与转换作用。但由于以往大地测量资料的不足,导致对亚东-谷露断裂整体运动特征的定量化分析较为匮... 详细信息

亚东-谷露断裂作为青藏高原东南部自新生代以来规模最大、活动性最强的拉张断裂,在青藏高原的构造变形与物质运移等过程中起着重要的调节与转换作用。但由于以往大地测量资料的不足,导致对亚东-谷露断裂整体运动特征的定量化分析较为匮乏。因此,本文收集并处理了亚东-谷露断裂地区2017年10月至2022年4月的哨兵影像数据,并联合GNSS速度场,解决了不同参考系下的形变场融合问题,获取了覆盖整个亚东-谷露断裂的高精度、高分辨率震间地壳形变场。进一步基于弹性微块体模型,精细厘定了亚东-谷露断裂现今活动特征:断裂整体以东倾为主,最佳倾角为68°,现今以拉张运动为主,速率为2~6 mm/a,并由南到北逐渐递增。另外,该断裂中段和北段的闭锁深度约为14 km;但南段可能受到主喜马拉雅逆冲断裂的影响,导致闭锁区域较浅,深度仅为4 km。最后,基于断裂的滑动亏损率与历史地震分布,分析得到断裂北段的地震危险性更高,为区域的地质灾害评估提供了重要参考。

关键词：亚东-谷露断裂 GNSS InSAR 拉张速率闭锁深度

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基于协同优化的耐压柱壳多学科多目标优化

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哈尔滨工程大学学报 2024年第1期45卷 62-69页

作者：王萌刘峰田震杨松源哈尔滨工程大学船舶工程学院黑龙江哈尔滨150001

为提高耐压柱壳的设计效率和结构性能,本文基于多学科设计优化思想,进行了耐压柱壳多学科设计优化的学科分解,确定了耐压柱壳多学科优化设计的设计参数,明确了设计变量间的耦合关系,设计了耐压柱壳参数化分析流程,进行了设计变量灵敏度... 详细信息

为提高耐压柱壳的设计效率和结构性能,本文基于多学科设计优化思想,进行了耐压柱壳多学科设计优化的学科分解,确定了耐压柱壳多学科优化设计的设计参数,明确了设计变量间的耦合关系,设计了耐压柱壳参数化分析流程,进行了设计变量灵敏度分析。在利用响应面模型建立了具有较高拟合精度耐压柱壳近似模型的基础上,以质量排水量比和极限载荷为目标函数,建立了基于协同优化方法的耐压柱壳多学科多目标优化模型,在确定了系统层和学科层的优化求解方法基础上,设计了基于协同优化的耐压柱壳多学科多目标优化框架,进行了优化的求解工作,得到了优化方案。与初始方案的对比表明:所得到的Pareto解集中,部分方案在2个目标函数上均得到了优化,验证了优化框架的有效性。

关键词：耐压柱壳设计参数耦合关系参数化分析流程近似模型目标函数协同优化方法多学科多目标优化优化框架

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