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Three-dimensional ordered hierarchically porous carbon materials for high performance Li-se battery

Journal of Energy Chemistry 2022年第5期31卷 624-636页

作者： Hongyan Li wenda Dong Chao Li Tarek Barakat Minghui sun Yingying Wang Liang Wu Lang Wang Lei Xia Zhi-Yi Hu Yu Li Bao-Lian su Laboratory of Inorganic Materials Chemistry(CMI) University of NamurB-5000 NamurBelgium Namur Institute of structured Matter(NIsM) University of NamurB-5000 NamurBelgium state Key Laboratory of Advanced Technology for Materials synthesis and Process.ng Wuhan University of TechnologyWuhan 430074HubeiChina

Developing host materials with high specific surface area, good electron conductivity, and fast ion transportation channel is critical for high performance lithium-selenium(Li-se) batteries. Herein, a series of three dimensional ordered hierarchically porous carbon(3D OHPC) materials with micro/meso/macropores are designed and synthesized for Li-se battery. The porous structure is tuned by following the concept of the generalized Murray’s law to facilitate the mass diffusion and reduce ion transport *** optimized 3D se/OHPC cathode exhibits a very high 2 nd discharge capacity of 651 m Ah/g and retains 361 m Ah/g after 200 cycles at 0.2 C. Even at a high current rate of 5 C, the battery still shows a discharge capacity as high as 155 m Ah/g. The improved electrochemical performance is attributed to the synergy effect of the interconnected and well-designed micro, meso and macroporosity while shortened ions diffusion pathways of such Murray materials accelerate its ionic and electronic conductivities leading to the enhanced electrochemical reaction. The diffusivity coefficient in se/OHPC can reach a very high value of 1.3 × 10^(-11)cm^(2)/s, much higher than those in s.ngle pore size carbon hosts. Their effective volume expansion accommodation capability and reduced dissolution of polyselenides ensure the high stability of the battery. This work, for the first time, established the clear relationship between textural properties of cathode materials and their performance and demonstrates that the concept of the generalized Murray’s law can be used as efficient guidance for the rational design and synthesis of advanced hierarchically porous materials and the great potential of 3D OHPC materials as a practical high performance cathode material for Li-se batteries.

关键词： 3D ordered hierarchically porous carbon(OHPC) shuttle effect Cyclability High rate capability The generalized Murray’s law Li-se batteries

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Effect of s.ngle-legged coil on 3D plasma boundary corrugation in EAsT

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Plasma science and Technology 2021年第10期23卷 102-111页

作者： Qibin Luan wenda Zhang Youjie Deng Yanfei Wang Li Li Yueqiang Liu Xiaojiang Huang Fangchuan Zhong Faculty of Electronic information and Electrical Engineering Dalian University of TechnologyDalian 116024People’s Republic of China school of Physics Dalian University of TechnologyDalian 116024People's Republic of China College of science Donghua UniversityShanghai 201620People's Republic of China General Atomics San DiegoCA 92186-5608United States of America

A s.ngle-legged coil behind the lower divertor and covering a 120° toroidal angle is utilized in a recent EAsT discharge, for the purpose of increas.ng the wetted area of the divertor surface by locally modifying the magnetic field near the X-point. The plasma response, in particular, the plasma boundary surface corrugation due to the s.ngle-legged coil current, is modeled by the updated MARs-F code, by computing the plasma displacement for all important toroidal harmonics(n?=?1, 2, 4 and 5) associated with the partial toroidal coverage by the coil. The plasma response produced by the s.ngle-legged coil is found to be non-local and is of the kinkpeeling type. For a reference EAsT plasma with a lower s.ngle-null magnetic configuration, the plasma boundary corrugation near the X-point, produced by the upper s.ngle-legged coil, is about twice as large as that produced by the lower s.ngle-legged coil, despite the proximity of the latter to the X-point.

关键词： s.ngle-legged coil plasma response EAsT

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A unique photosystem I reaction center from a chlorophyll d-containing cyanobacterium Acaryochloris marina

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Journal of Integrative Plant Biology 2021年第10期63卷 1740-1752页

作者： Caihuang Xu Qingjun Zhu Jing-Hua Chen Liangliang shen Xiaohan Yi Zihui Huang wenda Wang Min Chen Tingyun Kuang Jian-Ren shen Xing Zhang Guangye Han Department of Biophysics and Department of Pathology of sir Run Run shaw Hospital Zhejiang University School of MedicineHangzhou 310058China Photosynthesis Research Center Key Laboratory of PhotobiologyInstitute of BotanyThe Chinese Academy of SciencesBeijing 100093China College of Life sciences University of Chinese Academy of ScienceBeijing 100049China Center of Cryo-Electron Microscopy Zhejiang University School of MedicineHangzhou 310058China school of Life and Environmental science Faculty of ScienceUniversity of SydneySydney NSW2006Australia Division of Photosynthesis and structural Biology Institute for Interdisciplinary Scienceand Graduate School of Natural Science and TechnologyOkayama UniversityOkayama 700-8530Japan

Photosystem I(PsI)is a large protein supercomplex that catalyzes the light-dependent oxidation of plastocyanin(or cytochrome c6)and the reduction of *** catalytic reaction is realized by a transmembrane electron transfer chain consisting of primary electron donor(a special chlorophyll(Chl)pair)and electron acceptors A_(0),A_(1),and three Fe_(4)s_(4) clusters,F_(X),F_(A),and F_(B).Here we report the PsI structure from a Chl d-dominated cyanobacterium Acaryochloris marina at 3.3Åresolution obtained by s.ngle-particle cryo-electron *** *** PsI exists as a trimer with three identical ***,the structure reveals a unique composition of electron transfer chain in which the primary electron acceptor A_(0) is composed of two pheophytin a rather than Chl a found in any other well-known PsI structures.A novel subunit Psa27 is observed in the *** PsI *** addition,77 Chls,13α-carotenes,two phylloquinones,three Fe-s clusters,two phosphatidyl glycerols,and one monogalactosyl-diglyceride were identified in each PsI *** results provide a structural basis for deciphering the mechanism of photosynthesis in a PsI complex with Chl d as the dominating pigments and absorbing far-red light.

关键词： A.marina chlorophyll d cryoelectron microscopy pheophytin a photosynthesis photosystem I reaction center

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潜艇拖曳声呐总体工程设计

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中国舰船研究 2022年第2期17卷 220-227页

作者：时文达中国舰船研究设计中心湖北武汉430064

[目的]针对目前尚无一套完整的方法来阐述潜艇装备拖曳声呐的总体工程设计问题,对此问题的脉络进行梳理,系统性地提出总体工程设计要点。[方法]从传感系统及收放系统两个方面,在文献研究的基础上,深入阐述潜艇拖曳声呐装舰的工程问题,... 详细信息

[目的]针对目前尚无一套完整的方法来阐述潜艇装备拖曳声呐的总体工程设计问题,对此问题的脉络进行梳理,系统性地提出总体工程设计要点。[方法]从传感系统及收放系统两个方面,在文献研究的基础上,深入阐述潜艇拖曳声呐装舰的工程问题,例如拖曳声呐设计方案的选择(拖曳声呐数量、传感元件类型、拖缆长度)和收放装置的设计(卷盘、排缆、导管、驱动形式以及释放口位置选取等)。[结果]通过研究,提炼得到了拖曳声呐适合安装到潜艇上的基本流程、方法和工程计算公式(例如拖缆长度计算)。[结论]潜艇总体设计师可以灵活运用相关工程设计要点,结合潜艇的实际状态和拖曳声呐硬件技术特点,找到诸多性能元素之间的平衡点,从而设计出更优的拖曳声呐装艇方案。

关键词：拖曳声呐潜艇适装性舰船总体设计

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美托洛尔联合氯吡格雷对心肌缺血再灌注损伤小鼠的作用机制

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西部医学 2024年第3期36卷 365-371页

作者：门汝梅王艳林张琳娜门丽丽兰文达孟庆兰于建才沧州市人民医院心内三科河北沧州061099 沧州市中西医结合医院手显微外二科河北沧州061013 沧州市中心医院心内二科河北沧州061017

目的探讨美托洛尔联合氯吡格雷对心肌缺血再灌注(MI/R)损伤小鼠的效果及机制。方法 10周龄sPF级雄性C57BL/6小鼠75只被随机分为假手术组、模型组、美托洛尔组、氯吡格雷组及联合组,每组15只。分别术前给予假手术组和模型组生理盐水灌... 详细信息

目的探讨美托洛尔联合氯吡格雷对心肌缺血再灌注(MI/R)损伤小鼠的效果及机制。方法 10周龄sPF级雄性C57BL/6小鼠75只被随机分为假手术组、模型组、美托洛尔组、氯吡格雷组及联合组,每组15只。分别术前给予假手术组和模型组生理盐水灌胃、美托洛尔组小鼠美托洛尔(10 mg/kg)灌胃、氯吡格雷组小鼠氯吡格雷(20 mg/kg)灌胃、联合组小鼠美托洛尔(10 mg/kg)和氯吡格雷(20 mg/kg)灌胃。再灌注24 h后,超声检测各组小鼠左心室射血分数(EF)和左心室缩短分数(Fs);麻醉后取小鼠心脏组织,染色后计算各组小鼠缺血再灌注区心肌梗死面积;取小鼠外周血,采用流式细胞仪检测外周血血小板活化水平;对小鼠心脏组织进行免疫荧光检测缺血再灌注区血小板、中性粒细胞沉积水平;通过TUNEL染色检测缺血再灌注区心肌细胞凋亡水平;采用Western blot检测缺血再灌注区心肌组织的胱天蛋白酶3(Caspase 3)和多聚ADP核糖聚合酶(PARP1)水平。结果相较于假手术组,模型组小鼠左心室EF、Fs水平显著降低,缺血区心肌梗死面积显著增加(Ps水平显著高于模型组,缺血区心肌梗死面积显著少于模型组,且联合组上述指标水平均显著优于美托洛尔组或氯吡格雷组(Pspase 3和PARP1水平显著高于假手术组(Pspase 3和PARP1水平显著低于模型组(P<0.05);氯吡格雷组及联合组小鼠外周血血小板活化及缺血区心肌组织血小板、中性粒细胞沉积显著低于模型组(P<0.05);联合组上述指标水平均显著优于氯吡格雷组和美托洛尔组(P<0.05)。结论美托洛尔联合氯吡格雷治疗心肌缺血再灌注损伤效果优于美托洛尔或氯吡格雷单独治疗,其机制与抑制心肌细胞凋亡及血小板激活有关。

关键词：美托洛尔氯吡格雷心肌缺血再灌注血小板心肌细胞凋亡

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广州市旱雨季城市和郊区站点HONO分布特征及其对大气氧化性的贡献

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环境科学学报 2024年第10期44卷 121-132页

作者：田玉洁程鹏裴成磊黄坤伦陈彦宁李梅韩宝彬运丽君余毅航杨闻达凌基邓晖马文彬暨南大学环境与气候学院暨南大学质谱仪器与大气环境研究所广东省大气污染在线源解析系统工程技术研究中心环境质量协同创新粤港澳联合实验室广州 510632 广东省广州生态环境监测中心站广州 510308 广州禾信仪器股份有限公司广州 510530

气态亚硝酸(HONO)是对流层羟基自由基(·OH)的初级来源,对于大气氧化性具有重要影响.近年来,广州及周边地区开展了多次HONO观测,但该地区的HONO区域分布和季节变化未见报道.本研究基于2022年广州市区和郊区3个站点的同步观测数据,分析... 详细信息

气态亚硝酸(HONO)是对流层羟基自由基(·OH)的初级来源,对于大气氧化性具有重要影响.近年来,广州及周边地区开展了多次HONO观测,但该地区的HONO区域分布和季节变化未见报道.本研究基于2022年广州市区和郊区3个站点的同步观测数据,分析了各站点在典型季节的大气污染状况和HONO分布特征,并计算了HONO对·OH贡献的地区和季节差异.结果表明:广州市HONO浓度较历史观测值较低,可能和广州市大气污染浓度逐年降低的趋势相一致.番禺站((1.49±1.05)μg·m-3)HONO浓度最高,南沙站((1.24±1.08)μg·m-3)略低于番禺站,而从化站((0.40±0.39)μg·m-3)浓度最低.从季节差异来看,番禺站和南沙站的HONO浓度都是旱季高于雨季,和其他污染物基本一致.而从化站HONO浓度在雨季((0.49±0.44)μg·m-3)显著高于旱季((0.21±0.10)μg·m-3),可能和局地排放以及化学过程的共同作用有关.3个站点HONO对·OH的贡献排序为番禺站>南沙站>从化站,且雨季显著高于旱季.虽然HONO对·OH的平均贡献仅有O3的13%～48%,但在清晨占主导地位,对于光化学过程的启动起到重要作用.

关键词：气态亚硝酸 ·OH自由基旱雨季分析污染特征珠江三角洲

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高速列车半主动减振器活塞速度的测量

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中国机械工程 2006年第7期17卷 699-702页

作者：丁问司齐文达华南理工大学广州510641

基于天棚原理的高速列车半主动减振器中,为实现对实际安装减振器阻尼系数的计算和调整,需方便、准确地测量活塞运动速度。提出一种减振器活塞速度测量的新方法———气压测量法,它通过检测减振器蓄油箱的压力变化,并将其进行换算获得减... 详细信息

基于天棚原理的高速列车半主动减振器中,为实现对实际安装减振器阻尼系数的计算和调整,需方便、准确地测量活塞运动速度。提出一种减振器活塞速度测量的新方法———气压测量法,它通过检测减振器蓄油箱的压力变化,并将其进行换算获得减振器活塞速度。该方法简单、方便、有效,能适应高速列车运行时对横向减振力控制逻辑的要求。对气压法的原理及工程中需要注意的问题进行了阐述。

关键词：减振器活塞速度气压

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Antigenic Drift of the Hemagglutinin from an Influenza A(H1N1) pdm09 Clinical Isolate Increases its Pathogenicity In Vitro

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Virologica sinica 2021年第5期36卷 1220-1227页

作者： Lei Xing Yunbo Chen Boqian Chen Ling Bu Ying Liu Zhiqi Zeng wenda Guan Qigao Chen Yongping Lin Kun Qin Honglin Chen Xilong Deng Xinhua Wang Wenjun s.ng state Key Laboratory of Respiratory Disease National Clinical Research Center for Respiratory DiseaseGuangzhou Institute of Respiratory HealthThe First Affiliated Hospital of Guangzhou Medical UniversityGuangzhou 510180China Artemisinin Research Center Guangzhou University of Chinese MedicineGuangzhou 510405China Institute of Integration of Traditional and Western Medicine The First Affiliated Hospital of Guangzhou Medical UniversityGuangzhou 510180China Intensive Care Unit Guangzhou No.8 People’s Hospital of Guangzhou Medical UniversityGuangzhou 510060China state Key Laboratory of Emerging Infectious Diseases Department of MicrobiologyThe University of Hong KongHong Kong SARChina China CDC National Institute for Viral Disease Control and PreventionBeijing 100052China

The influenza A(H1 N1)pdm09 virus emerged in 2009 and has been continuously circulating in humans for over ten ***,we analyzed a clinical influenza A(H1 N1)pdm09-infected patient case hospitalized for two months in Guangdong(from December 14,2019 to February 15,2020).This isolate,named A/Guangdong/LCF/2019(LCF/19),was genetically sequenced,rescued by reverse genetics,and phylogenetically analyzed in the context of other relevant pdm09 *** with earlier isolates,this pdm09 virus’s genetic sequence contains four substitutions,s186 P,T188 I,D190 A,and Q192 E,of the hemagglutinin(HA)segment at position 186–192(H3 numbering)in the epitope sb,and two of which are located at the *** analysis indicated that the epitope sb started undergoing a rapid antigenic change *** characterize the pathogenicity of this novel substitution motif,a panel of reassortant viruses containing the LCF/2019 HA segment or the chimeric HA segment with the four substitutions were *** growth data revealed that the reassortant viruses,including the LCF/2019 with the PTIAAQE substitution,propagated faster than those rescued ones having the sTTADQQ motif in the epitope sb in Madin-Darby Canine Kidney(MDCK)*** HI test showed that the binding activity of escape mutant to 2018 pdm09 sera was weaker than GLW/2018,suggesting that old vaccines might not effectively protect people from *** to the difference in the selection of vaccine strains,people vaccinated in the southern hemisphere could still suffer a severe infection if infected with this antigenic drift pdm09 virus.

关键词： HA antigenic drift Influenza A(H1N1)pdm09 virus HA epitope sb

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Rational design of Ru species on N-doped graphene promoting water dissociation for boosting hydrogen evolution reaction

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science China Chemistry 2022年第3期65卷 521-531页

作者： Zhida Chen wenda Chen Lirong Zheng Tao Huang Jing Hu Yaqi Lei Qi Yuan Xiangzhong Ren Yongliang Li Lei Zhang shaoluan Huang shenghua Ye Qianling Zhang Xiaoping Ouyang Xueliang sun Jianhong Liu Graphene Composite Research Center Shenzhen UniversityCollege of Chemistry and Environmental EngineeringShenzhen UniversityShenzhen 518060China Department of Mechanical and Materials Engineering University of Western OntarioLondonOntario N6A 5B9Canada shenzhen Eigen-Equation Graphene Technology Co.Ltd. Shenzhen 518000China Institute of High Energy Physics Chinese Academy of sciences Beijing 100049China school of Materials science and Engineering Xiangtan UniversityXiangtan 411105China

In this study,the morphological distribution of Ru on nitrogen-doped graphene(ng)could be rationally regulated via modulating the combination mode between Ru precursor and the zeolite imidazolate framework-8(ZIF-8).The cation exchange and host-guest strategies respectively resulted in two different combination modes between Ru precursor and ZIF-8 anchored on *** pyrolysis of the above precursors,Ru s.ngle-atom sites(sAss)with and without Ru nanoparticles(NPs)were formed selectively on ng(denoted as Ru sAss+NPs.ng and Ru sAss.ng,respectively).Ru sAss+NPs.ng exhibited excellent hydrogen evolution reaction(HER)performance in alkaline solutions(η_(10)=12 mV,12.57 A mg^(-1)_(Ru) at 100 mV),which is much better than Ru sAss/*** experimental and theoretical study revealed that Ru sAss could adsorb hydrogen with optimal adsorption strength,while Ru NPs could lower the barrier of water molecule dissociation,and thus Ru sAss and Ru NPs could synergistically promote the catalytic performance of HER in alkaline solutions.

关键词： Ru s.ngle atomic sites nanoparticles water dissociation synergistic effect

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AN APPROACH TOWARDs THE IMPLEMENTATION OF CHARACTERIsTIC sET METHOD

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systems science and Mathematical sciences 1999年第S1期12卷 88-95页

作者： WU wenda LIU Zhuojun LIN Dongdai( Mathematics Mechanization Research Center, Institute of systems science,Academia sinica,Beijing 100080, China)

Wu’s Characteristic set Method is a theory that can compute, analyze thestructure of the zeros of a polynomial system. In the past two decades, the practice applications of Wu’s method have proved that it is a powerful tool for many problems encountered in mathematics, science, engineering, and industrial/ social applications. Focus.ngon the implementation of Characteristic set method, ELIMINO is a computer mathematics research system designed for researchers to perform sophisticated mathematicalcomputations. It has very general capabilities for treating integers, it has an interactiveprogramming capability which allow users to create new facilities.

关键词： Wu’s method Characteristic set Method ELIMINO computermathematics mathematical research software.

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