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Deep Synchronization Control of Grid-Forming Converters:A Reinforcement Learning Approach

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IEEE/CAA Journal of Automatica Sinica 2025年第1期 273-275页

作者： Zhuorui Wu meng Zhang Bo Fan Yang Shi Xiaohong Guan the School of Cyber Science and Engineering Xi'an Jiaotong University the Department of Mechanical Engineering University of Victoria

Dear Editor,This letter proposes a deep synchronization control(DSC) method to synchronize grid-forming converters with power grids. The method involves constructing a novel controller for grid-forming converters based on the stable deep dynamics model. To enhance the performance of the controller, the dynamics model is optimized within the deep reinforcement learning(DRL) framework. Simulation results verify that the proposed method can reduce frequency deviation and improve active power responses.

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Variational inference in neural functional prior using normalizing flows: application to differential equation and operator learning problems

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Applied Mathematics and Mechanics(English Edition) 2023年第7期44卷 1111-1124页

作者： Xuhui meng Institute of Interdisciplinary Research for Mathematics and Applied Science School of Mathematics and StatisticsHuazhong University of Science and TechnologyWuhan 430074China

Physics-informed deep learning has recently emerged as an effective tool for leveraging both observational data and available physical ***-informed neural networks(PINNs)and deep operator networks(DeepONets)are two such *** former encodes the physical laws via the automatic differentiation,while the latter learns the hidden physics from ***,the noisy and limited observational data as well as the over-parameterization in neural networks(NNs)result in uncertainty in predictions from deep learning *** paper“meng,X.,YANG,L.,MAO,Z.,FERRANDIS,J.D.,and KARNIADAKIS,*** functional priors and posteriors from data and *** of Computational Physics,457,111073(2022)”,a Bayesian framework based on the generative adversarial networks(GANs)has been proposed as a unified model to quantify uncertainties in predictions of PINNs as well as ***,the proposed approach in“meng,X.,YANG,L.,MAO,Z.,FERRANDIS,J.D.,and KARNIADAKIS,*** functional priors and posteriors from data and *** of Computational Physics,457,111073(2022)”has two stages:(i)prior learning,and(ii)posterior *** the first stage,the GANs are utilized to learn a functional prior either from a prescribed function distribution,e.g.,the Gaussian process,or from historical data and available *** the second stage,the Hamiltonian Monte Carlo(HMC)method is utilized to estimate the posterior in the latent space of ***,the vanilla HMC does not support the mini-batch training,which limits its applications in problems with big *** the present work,we propose to use the normalizing flow(NF)models in the context of variational inference(VI),which naturally enables the mini-batch training,as the alternative to HMC for posterior estimation in the latent space of GANs.A series of numerical experiments,including a nonlinear differential equation problem and a 100-dimensional(100D)Darcy problem,are conducted to demonstrate that

关键词： uncertainty quantification(UQ) physics-informed neural network(PINN)

Tuning precise numbers of supported nickel clusters on graphdiyne for efficient CO_(2)electroreduction toward various multi-carbon products

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Journal of Energy Chemistry 2022年第6期31卷 456-465,I0013页

作者： meiqi Yang Zhongxu Wang Dongxu Jiao Yu Tian Yongchen Shang Lichang Yin Qinghai Cai Jingxiang Zhao College of Chemistry and Chemical Engineering Key Laboratory of Photonic and Electronic Bandgap MaterialsMinistry of EducationHarbin Normal UniversityHarbin 150025HeilongjiangChina Institute for Interdisciplinary Quantum Information Technology Jilin Engineering Normal UniversityChangchun 130052JilinChina Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016LiaoningChina Heilongjiang Province Collaborative Innovation Center of Cold Region Ecological Safety Harbin 150025HeilongjiangChina

Compared to single-atom catalysts,supported metal clusters can exhibit enhanced activity and designated selectivity in heterogeneous catalysis due to their unique geometric and electronic ***,by means of comprehensive density functional theory (DFT) computations,we systematically investigated the potential of several Ni clusters supported on graphdiyne (Ni_(x)/GDY,x=1–6) for CO_(2) reduction reaction (CO_(2)RR).Our results revealed that,due to the strong interaction between Ni atoms and sp-hybridized C atoms,these supported Ni clusters on GDY exhibit high stabilities and excellent electronic *** particular,according to the computed free energy profiles for CO_(2)RR on these Ni_(x)/GDY systems,the anchored Ni_(4) cluster was revealed to exhibit high CO_(2)RR catalytic activity with a small limiting potential and moderate kinetic barrier for C–C coupling,and CH_(4),C_(2)H_(5)OH,and C_(3)H_(7)OH were identified as the main products,which can be attributed to its strong capacity for CO_(2) activation due to its unique configuration and excellent electronic ***,by carefully controlling the precise numbers of atoms in sub-nano clusters,the spatially confined Ni clusters can perform as promising CO_(2)RR catalysts with high-efficiency and high-selectivity,which may provide a useful guidance to further develop novel and low-cost metal clusters-based catalysts for sustain CO_(2)conversion to valuable chemicals and fuels.

关键词： CO_(2)reduction Supported metal clusters Graphdiyne Multi-carbon products Density functional theory

Advances in ethnopharmacology,phytochemistry and pharmacology of Erigerontis Herba and its Chinese medicine prescriptions

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Traditional Medicine Research 2025年第1期10卷 44-61页

作者： Yang Zhou Yuan-Yan Huang Ding-Yue Shang Ying Chen meng Tian Cheng-Yu Jin Xin Lu Bing-Chun Yan Han-Qing Pang Institute of Translational Medicine School of MedicineYangzhou UniversityYangzhou 225009China Jiangsu Key Laboratory of Integrated Traditional Chinese and Western Medicine for Prevention and Treatment of Senile Diseases Yangzhou UniversityYangzhou 225009China School of Medicine Nanjing University of Chinese MedicineNanjing 210023China State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources Guangxi Normal UniversityGuiling 541004China.

Erigerontis Herba(EH),the dried whole plant of Erigeron breviscapus,is well-known for circulating blood,activating meridians to alleviate pain,expelling wind,and clearing away *** has been extensively utilized in southern China for the treatment of stroke hemiplegia,chest stuffiness and pains,rheumatic arthralgia,headache,and *** review focuses on the botany,ethnopharmacology,phytochemistry,pharmacology and toxicity of EH and its related prescriptions to offer new insights for prospective research of *** information about EH was retrieved from ancient records and books,PubMed,China National Knowledge Infrastructure,Chinese Pharmacopoeia,Web of Science,Doctoral and Master’s Theses,and various electronic *** is a member of Compositae family and is mainly grown in southern *** Chinese medicine records that EH has the effects of circulating blood and removing blood stasis,expelling wind,and removing cold,as well as relieving rigidity of muscle and relieving *** now,nearly 200 ingredients have been characterized from EH,including flavonoids,caffeoyls,aromatic acids,coumarins,pentacyclic terpenoids,volatile oil and other *** extracts,EH related prescriptions(Dengzhan Xixin injection,Dengzhan Shengmai capsules,etc.)or compounds(scutellarin,scutellarein,etc.)possessed obvious therapeutic effects of ischemic stroke,cerebral hemorrhage,myocardial infarction,Alzheimer’s disease,diabetes and its complications,gastric cancer,bone,and joint degenerative ***,the major active compound of EH,has been used as a quality *** no obvious toxicity of EH has been *** to its traditional applications,ethnopharmacology,phytochemistry,pharmacology,and toxicity,EH was applied as a valuable herb for clinical application in food and medicine *** several compounds have been shown to possess diverse biological activities,the underlying mechanisms of their actions remain *** fully exploi

关键词： Erigeron breviscapus traditional applications ethnopharmacology phytochemistry pharmacology

Effects of Temperature Induced Thermal Expansion and Oxidation on the Charpy Impact Property of C/C Composites

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Journal of Wuhan University of Technology(Materials Science) 2015年第3期30卷 473-477页

作者：米应映燕青芝 LI Xianhui HONG Ming CAO meiqi ZHANG Xiaoxin Institute of Nuclear and New Energy Systems Materials University of Science and Technology Beijing

C/C composites are the emerging materials of choice for aero-engine hot-end components that will bear impact loading in thermal-oxidizing environments. For the components run for extended periods, the safe operation of components depends on how to evaluate damages under a dynamic load. In this study, Charpy impact tests at a temperature range of 25 to l 200 ＂C were carried out on C/C composites to verify the effects of temperature induced thermal expansion and oxidation on their impact performance. Below 800 ℃, oxidation was negligible and composites expanding played a leading role, resulting in the remarkable increase in fiber/ matrix interface strength and impact energy. However, when the temperature was above 800 ℃, the release of CO or CO2 due to oxidation resulted in a lower impact energy.

关键词： C/C composites impact property thermal expansion oxidation

An IEEE value loop of human-technology collaboration in geospatial information science

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Geo-Spatial Information Science 2020年第1期23卷 61-67页

作者： Liqiu meng Chair of Cartography Technical University of MunichMunichGermany

Geosensing and social sensing as two digitalization mainstreams in big data era are increasingly converging toward an integrated system for the creation of semantically enriched digital *** with the rapid developments of AI technologies,this convergence has inevitably brought about a number of *** the one hand,value-adding chains from raw data to products and services are becoming value-adding loops composed of four successive stages–Informing,Enabling,Engaging and Empowering(IEEE).Each stage is a dynamic loop for *** the other hand,the“human versus technology”relationship is upgraded toward a game-changing“human and technology”*** information loop is essentially shaped by the omnipresent reciprocity between humans and technologies as equal partners,co-learners and co-creators of new *** paper gives an analytical review on the mutually changing roles and responsibilities of humans and technologies in the individual stages of the IEEE loop,with the aim to promote a holistic understanding of the state of the art of geospatial information ***,the author elicits a number of challenges facing the interwoven human-technology *** transformation to a growth mind-set may take time to realize and *** works on large-scale semantic data integration are just in the *** experiences of geovisual analytic approaches are far from being systematically ***,the ethical concerns for the handling of semantically enriched digital Earth cover not only the sensitive issues related to privacy violation,copyright infringement,abuse,*** also the questions of how to make technologies as controllable and understandable as possible for humans and how to keep the technological ethos within its constructive sphere of societal influence.

关键词： Geosensing social sensing geovisual analytics semantic web embodied cognition ethics uncertainty

Harnessing the potential of hydrogels for advanced therapeutic applications: current achievements and future directions

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Signal Transduction and Targeted Therapy 2024年第8期9卷 3176-3241页

作者： Pelin Lu Dongxue Ruan meiqi Huang Mi Tian Kangshun Zhu Ziqi Gan Zecong Xiao Nanomedicine Research Center The Third Affiliated Hospital of Sun Yat-sen UniversityGuangzhou 510630PR China Department of Minimally Invasive Interventional Radiology and Laboratory of Interventional RadiologyThe Second Affiliated Hospital of Guangzhou Medical UniversityGuangzhou 510260PR China State Key Laboratory of Respiratory Disease National Clinical Research Center for Respiratory DiseaseNational Center for Respiratory MedicineDepartment of Respiratory and Critical Care MedicineGuangzhou Institute for Respiratory HealthThe First Affiliated Hospital of Guangzhou Medical UniversityGuangzhou 510120PR China Department of Stomatology Chengdu Second People's HospitalChengdu 610021PR China Hospital of Stomatology Guangdong Provincial Key Laboratory of StomatologyGuanghua School of StomatologySun Yat-sen UniversityGuangzhou 510055PR China

The applications of hydrogels have expanded significantly due to their versatile,highly tunable properties and breakthroughs in biomaterial *** this review,we cover the major achievements and the potential of hydrogels in therapeutic applications,focusing primarily on two areas:emerging cell-based therapies and promising non-cell therapeutic *** the context of cell therapy,we discuss the capacity of hydrogels to overcome the existing translational challenges faced by mainstream cell therapy paradigms,provide a detailed discussion on the advantages and principal design considerations of hydrogels for boosting the efficacy of cell therapy,as well as list specific examples of their applications in different disease *** then explore the potential of hydrogels in drug delivery,physical intervention therapies,and other non-cell therapeutic areas(e.g.,bioadhesives,artificial tissues,and biosensors),emphasizing their utility beyond mere delivery ***,we complement our discussion on the latest progress and challenges in the clinical application of hydrogels and outline future research directions,particularly in terms of integration with advanced biomanufacturing *** review aims to present a comprehensive view and critical insights into the design and selection of hydrogels for both cell therapy and noncell therapies,tailored to meet the therapeutic requirements of diverse diseases and situations.

关键词： directions overcome breakthrough

止血带在导航系统下行全膝关节置换的应用时机选择:一项单中心、回顾性分析

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中国组织工程研究 2025年第15期29卷 3159-3164页

作者：潘浩杨梦刘国强河北省沧州中西医结合医院河北省中西医结合骨关节病研究重点实验室河北省沧州市061000

背景:传统全膝关节置换过程中应用止血带的时机已有明确报道,随着关节相关技术不断精进,导航系统下全膝关节置换应用止血带的时机却鲜有报道。目的:评估采用全程与半程止血带对Brainlab导航系统下行全膝关节置换疗效的影响。方法:回顾... 详细信息

背景:传统全膝关节置换过程中应用止血带的时机已有明确报道,随着关节相关技术不断精进,导航系统下全膝关节置换应用止血带的时机却鲜有报道。目的:评估采用全程与半程止血带对Brainlab导航系统下行全膝关节置换疗效的影响。方法:回顾性分析2022年1-12月在河北省沧州中西医结合医院行导航系统下全膝关节置换患者的资料,选择符合条件的145例患者进行分析,按松开止血带时机分为全程组(n=71)和半程组(n=74)。收集患者一般资料、围术期情况、术后膝关节周围肿胀情况、下肢深静脉血栓发生情况、目测类比评分、美国特种外科医院膝关节评分和关节遗忘评分,评估膝关节功能并进行比较。结果与结论:①与半程组相比,全程组患者的手术时间更短、下肢深静脉血栓发生率更高、术后膝关节肿胀情况更重(P0.05);④提示采用导航系统行全膝关节置换的患者中,半程使用止血带隐匿性失血量少、术后患肢肿胀程度及下肢深静脉血栓发生率低,膝关节功能恢复更快。

关键词：导航系统全膝关节置换止血带膝关节功能关节遗忘评分

Sulfolane‑Based Flame‑Retardant Electrolyte for High‑Voltage Sodium‑Ion Batteries

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Nano-Micro Letters 2025年第2期17卷 498-516页

作者： Xuanlong He Jie Peng Qingyun Lin meng Li Weibin Chen Pei Liu Tao Huang Zhencheng Huang Yuying Liu Jiaojiao Deng Shenghua Ye Xuming Yang Xiangzhong Ren Xiaoping Ouyang Jianhong Liu Biwei Xiao Jiangtao Hu Qianling Zhang Graphene Composite Research Center College of Chemistry and Environmental EngineeringShenzhen UniversityShenzhen 518060People’s Republic of China Center of Electron Microscopy State Key Laboratory of Silicon and Advanced Semiconductor MaterialsSchool of Materials Science and EngineeringZhejiang UniversityHangzhou 310027People’s Republic of China GRINM(Guangdong)Research Institute for Advanced Materials and Technology FoshanGuangdong 528051People’s Republic of China College of Energy Engineering Zhejiang UniversityHangzhouZhejiang 310027People’s Republic of China School of Materials Science and Engineering Xiangtan UniversityXiangtan 411105People’s Republic of China Shenzhen Eigen-Equation Graphene Technology Co.Ltd Shenzhen 518000People’s Republic of China

Sodium-ion batteries hold great promise as next-generation energy storage ***,the high instability of the electrode/electrolyte interphase during cycling has seriously hindered the development of *** particular,an unstable cathode–electrolyte interphase(CEI)leads to successive electrolyte side reactions,transition metal leaching and rapid capacity decay,which tends to be exacerbated under high-voltage ***,constructing dense and stable CEIs are crucial for high-performance *** work reports localized high-concentration electrolyte by incorporating a highly oxidation-resistant sulfolane solvent with non-solvent diluent 1H,1H,5H-octafluoropentyl-1,1,2,2-tetrafluoroethyl ether,which exhibited excellent oxidative stability and was able to form thin,dense and homogeneous *** excellent CEI enabled the O3-type layered oxide cathode NaNi_(1/3)Mn_(1/3)Fe_(1/3)O_(2)(NaNMF)to achieve stable cycling,with a capacity retention of 79.48%after 300 cycles at 1 C and 81.15%after 400 cycles at 2 C with a high charging voltage of 4.2 *** addition,its nonflammable nature enhances the safety of *** work provides a viable pathway for the application of sulfolane-based electrolytes on SIBs and the design of next-generation high-voltage electrolytes.

关键词： Sodium-ion batteries Sulfolane-based electrolyte High voltage Layered oxide cathode Flame retardant