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Chemical constituents from Vernonia bockiana

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Chinese Journal of Natural Medicines 2019年第12期17卷 924-927页

作者： DONG Shi-Hui WU Yan yue jian-min State Key Laboratory of Drug Research Shanghai Institute of Materia MedicaChinese Academy of SciencesShanghai 201203China State Key Laboratory of Applied Organic Chemistry College of Chemistry and Chemical EngineeringLanzhou UniversityLanzhou 730000China

A new sesquiterpenoid and two pregnane steroids,named vernobockolide C(1)and vernobockones A and B(2 and 3),respevtively,along with a known sesquiterpenoid,7,10-epoxy-11-hydroxy-bisabol-2-en-15-al,were isolated from the aerial part of Vernonia *** structures were elucidated on the basis of extensive spectroscopic data analysis,especially 2 D NMR(HSQC,HMBC,and ROESY).This study further expands the chemical space of this underexplored species.

关键词： Vernonia bockiana Sesquiterpenoid Steroid

Ru-doped phosphorene for electrochemical ammonia synthesis

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Rare Metals 2020年第8期39卷 874-880页

作者： jian-Dong Liu Zeng-Xi Wei Yu-Hai Dou yue-Zhan Feng jian-min Ma Advanced Catalytic Engineering Research Center of the ministry of Education School of Physics and ElectronicsHunan UniversityChangsha 410082China Centre for Clean Environment and Energy Gold Coast CampusGriffith UniversityGold Coast QLD 4222Australia Key Laboratory of Materials Processing and Mold(Zhengzhou University) Ministry of EducationZhengzhou UniversityZhengzhou 450002China

The electrochemical ammonia synthesis has attracted increasing attention due to its energy saving ***,developing novel electrocatalysts and their mechanism remain great ***,several transition metal(TM)atoms doped on phosphorene were studied as N2 fixation electrocatalysts by using density functional theory(DFT)*** results demonstrate that single Ru atom doped phosphorene shows an excellent catalytic activity for ammonia synthesis via the enzymatic pattern.A small overpotential of 0.696 V is achieved for this *** effect of oxidation in the catalyst was also discussed in our *** deactivates the catalyst,which should be avoided in the *** outcomes offer a novel perspective for single-atom catalytic ammonia synthesis with phosphorene as a substrate.

关键词： Phosphorene Nitrogen reduction reaction Doping Single-atom catalysis Ammonia synthesis

基于DSP的电机控制系统软件可靠性防护设计

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华北电力技术 2017年第4期 66-70页

作者：高冉馨刘俭李敏孙跃陈乐然徐小天国网冀北电力有限公司电力科学研究院(华北电力科学研究院有限责任公司) 北京100045 中国科学院电子学研究所北京100091

电机控制系统的数字化是当前电力电子技术发展的趋势。DSP能够实时快速地实现各种数字信号处理算法,在电机控制系统中得到了较多的应用。然而,环境中存在许多影响DSP软件可靠性的因素,尤其是外界环境中的静电场和电磁场会对DSP软件的正... 详细信息

电机控制系统的数字化是当前电力电子技术发展的趋势。DSP能够实时快速地实现各种数字信号处理算法,在电机控制系统中得到了较多的应用。然而,环境中存在许多影响DSP软件可靠性的因素,尤其是外界环境中的静电场和电磁场会对DSP软件的正常运行产生一定的干扰。通过对DSP软件进行分析,从多方面对软件进行防护设计,防止运行过程中的程序错误,有效地提高了电机控制系统的可靠性,保证电机控制系统安全可靠运行。

关键词： DSP软件电机控制系统可靠性防护软件故障

Pharmacological targeting cGAS/STING/NF-κB axis by tryptanthrin induces microglia polarization toward M2 phenotype and promotes functional recovery in a mouse model of spinal cord injury

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Neural Regeneration Research 2025年第11期20卷 3287-3301页

作者： Ziwei Fan Mengxian Jia jian Zhou Zhoule Zhu Yumin Wu Xiaowu Lin Yiming Qian Jiashu Lian Xin Hua jianhong Dong Zheyu Fang Yuqing Liu Sibing Chen Xiumin Xue Juanqing yue minyu Zhu Ying Wang Zhihui Huang Honglin Teng Department of Orthopedics(Spine Surgery) the First Affiliated Hospital of Wenzhou Medical UniversityWenzhouZhejiang ProvinceChina School of Pharmacy Hangzhou Normal UniversityHangzhouZhejiang ProvinceChina Department of Neurology The First Affiliated Hospital of Wenzhou Medical UniversityWenzhouZhejiang ProvinceChina Department of Pathology Affiliated Hangzhou First People’s HospitalSchool of MedicineWestlake UniversityHangzhouZhejiang ProvinceChina Department of Clinical Research Center Affiliated Hangzhou First People’s HospitalSchool of MedicineWestlake UniversityHangzhouZhejiang ProvinceChina

The M1/M2 phenotypic shift of microglia after spinal cord injury plays an important role in the regulation of neuroinflammation during the secondary injury phase of spinal cord *** of shifting microglia polarization from M1(neurotoxic and proinflammatory type)to M2(neuroprotective and anti-inflammatory type)after spinal cord injury appears to be *** possesses an anti-inflammatory biological ***,its roles and the underlying molecular mechanisms in spinal cord injury remain *** this study,we found that tryptanthrin inhibited microglia-derived inflammation by promoting polarization to the M2 phenotype in *** promoted M2 polarization through inactivating the cGAS/STING/NF-κB ***,we found that targeting the cGAS/STING/NF-κB pathway with tryptanthrin shifted microglia from the M1 to M2 phenotype after spinal cord injury,inhibited neuronal loss,and promoted tissue repair and functional recovery in a mouse model of spinal cord ***,using a conditional co-culture system,we found that microglia treated with tryptanthrin suppressed endoplasmic reticulum stress-related neuronal *** together,these results suggest that by targeting the cGAS/STING/NF-κB axis,tryptanthrin attenuates microglia-derived neuroinflammation and promotes functional recovery after spinal cord injury through shifting microglia polarization to the M2 phenotype.

关键词： cGAS/STING functional recovery microglia neuroinflammation neuroprotection nuclear factor-κB polarization spinal cord injury tryptanthrin

Experimental Studies on Sloshing Mitigation Using Dual Perforated Floating Plates in A Rectangular Tank

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China Ocean Engineering 2021年第2期35卷 301-307页

作者： YU yue-min College of Civil Engineering and Architecture Hainan UniversityHaikou 570228China State Key Laboratory of Marine Resource Utilization in South China Sea Hainan UniversityHaikou 570228China

The performance of dual perforated floating plates in a rectangular tank is investigated based on the model tests under different external excitations for different filling *** is found that dual perforated floating plates in the tank can remarkably mitigate violent resonant sloshing responses compared with the clean tank,especially when the external excitation frequency is in the vicinity of the first-order resonant ***,the parametric studies based on different filling rates and external excitation amplitudes are performed for the first-order resonant *** presence of dual perforated floating plates seldom shifts the sloshing natural ***,dual perforated floating plates change the sloshing modes from the standing-wave mode in the clean tank to the Utube mode,which can arise from the sloshing reduction to some extent.

关键词： suppressing sloshing experiment dual perforated floating plates the lowest natural frequency sloshing mode

Recent progress on FeS_(2) as anodes for metal-ion batteries

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Rare Metals 2020年第11期39卷 1239-1255页

作者： Xin Li Shi-Han Qi Wen-Chao Zhang yue-Zhan Feng jian-min Ma School of Physics and Electronics Hunan UniversityChangsha 410082China Institute for Superconducting and Electronic Materials(ISEM) School of MechanicalMaterialsMechatronics and Biomedical EngineeringFaculty of Engineering and Information SciencesUniversity of WollongongWollongongNSW 2500Australia Key Laboratory of Materials Processing and Mold(Zhengzhou University) Ministry of EducationZhengzhou UniversityZhengzhou 450002China

The ever-growing demand for advanced battery technologies with high energy and power density,high security,prolonged cycle life,and sustainably low cost requires the development of novel electrode materials for lithium-ion batteries(LIBs),as well as the alternative electrochemical energy storage technologies of sodium-ion batteries(SIBs)and potassium-ion batteries(PIBs)for their abundant alkali metal elements *** various anode materials,such as graphite,organic compounds,metal oxides,and chalcogenides,iron sulfides have attracted substantial interests for their high theoretical capacity and low ***,as a common mineral that has been already applied as electrode for primary battery,ferrous disulfide(FeS_(2))has been regarded as one of the promising candidate anode materials and studied ***,there are some inherent problems handicapping its practical application for alkali-ion batteries,including limited ionic/electrical conductivity,the formation of soluble polysulfides,and large volume *** the last decade,massive efforts have been devoted to solving those *** this review,the various synthesis strategies,the effect of morphologies and particle sizes,the energy storage mechanisms,and the electrochemical performances of FeS_(2) as anode for alkaliion batteries(LIBs,SIBs,and PIBs)are ***,the existing challenges and prospects of the development of FeS_(2)-based anode materials for alkali-ion batteries are presented at last.

关键词： Ferrous disulfide Alkali-ion batteries Anode Energy storage Synthesis strategies

Impact of assimilating Taiwan＇s coastal radar radial velocity on forecasting Typhoon Morakot (2009) in southeastern China using a WRF-based EnKF

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Science China Earth Sciences 2017年第2期60卷 315-327页

作者： yue jian MENG ZhiYong Laboratory for Climate and Ocean-Atmosphere Studies Department of Atmospheric and Oceanic Sciences School of Physics Peking University Beij'ing 100871 China

This study explores for the first time the impact of assimilating radial velocity(Vr)observations from a single or multiple Taiwan's coastal radars on tropical cyclone(TC)forecasting after landfall in the Chinese mainland by using a Weather Research and Forecasting model(WRF)-based ensemble Kalman filter(EnKF)data assimilation *** Morakot(2009),which caused widespread damage in the southeastern coastal regions of the mainland after devastating Taiwan,was chosen as a case *** results showed that assimilating Taiwan's radar Vr data improved environmental field and steering flow and produced a more realistic TC position and structure in the final EnKF cycling ***,the subsequent TC track and rainfall forecasts in southeastern China were *** addition,better observations of the TC inner core by Taiwan's radar was a primary factor in improving TC rainfall forecast in the Chinese mainland.

关键词： Radial velocity EnKF TC track forecast Rainfall forecast Chinese mainland

Analysis and evaluation of effects of processing steps on dimensional tolerance of PIM parts

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Journal of Central South University of Technology 2005年第Z1期12卷 33-38页

作者： LI Yi-min LOU Jia yue jian-ling State Key Laboratory of Powder Metallurgy Central South University Changsha 410083 China State Key Laboratory of Powder Metallurgy Central South University Changsha 410083 China State Key Laboratory of Powder Metallurgy Central South University Changsha 410083 China

The factors affecting the dimensional tolerance of powder injection molding (PIM), such as the selection of the powder and binder, the feedstock homogeneity, the feedstock thermal properties, the feedstock rheologic behavior, the debinding schedule and atmosphere and sintering temperature gradient were discussed. An attempt was made to develop a model to estimate the influence of important variables. The results show that a better understanding of these factors can provide some useful theoretical instructions for large scale production.

关键词： powder injection molding dimensional tolerance processing step

Recent advances in alloy-based anode materials for potassium ion batteries

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Rare Metals 2020年第9期39卷 970-988页

作者： Shi-Han Qi Ji-Wei Deng Wen-Chao Zhang yue-Zhan Feng jian-min Ma State Key Laboratory of High-Performance Complex Manufacturing College of Mechanical and Electrical EngineeringCentral South UniversityChangsha 410083China School of Physics and Electronics Hunan UniversityChangsha 410082China Institute for Superconducting and Electronic Materials(ISEM) School of MechanicalMaterialsMechatronics&Biomedical EngineeringFaculty of Engineering and Information SciencesUniversity of WollongongWollongongNSW 2500Australia Key Laboratory of Materials Processing and Mold(Zhengzhou University) Ministry of EducationZhengzhou UniversityZhengzhou 450002China

Potassium ion batteries(PIBs)are regarded as one of promising low-cost energy storage *** long cycle life and high energy density has been considered as important tasks for developing high-performance *** alloy-based anodes for PIBs have attracted great attentions because of their high theoretical capacity and relatively low operating *** this review,the latest advance in the related alloy-based anodes was ***,the correlations among the morphology and potassium storage performance,phase transition mechanisms,the formation of solid electrolyte interphases and ionic transport kinetics are critically *** is expected that this review will provide meaningful guidance and possible pathways for the developments of alloy-based anodes for PIBs.

关键词： Potassium ion batteries Anode Alloy-based alloys Performance Nanostructures