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Mesoporous silica anchored on reduced graphene oxide nanocomposite as anode for superior lithium-ion capacitor

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Rare Metals 2022年第2期41卷 368-377页

作者： Sherif A.El-Khodary.Gokila Subburam Bo-Bo Zou Juan Wang Jing-Xia Qiu xian-Hu Liu Dickon H.L.ng Shuang Wang Jia-Biao Lian School of Energy.and Power Engineering Institute for Energy ResearchJiangsu UniversityZhenjiang 212013China Building Phy.ics and Environment Institute Housing and Building National Research Center(HBRC)Dokki 12311CairoEgypt School of Energy.and Power Engineering Institute for Energy ResearchSchool of Chemistry and Chemical EngineeringJiangsu UniversityZhenjiang 212013China Key.Laboratory.of Materials Processing and Mold(Zhengzhou University. Ministry of EducationZhengzhou UniversityZhengzhou 450002China Department of Phy.ics The Chinese University of Hong KongShatinHong Kong 999077China School of Energy.and Power Engineering Jiangsu UniversityZhenjiang 212013China

Mesoporous silica(mSiO_(2))has attracted great interest as anode for lithium-ion ***,the low intrinsic conductivity.is a major challenge for its *** this study.a low-cost sol–gel method is employ.d to sy.thesize mesoporous silica anchored on graphene nanosheets(rGO)for lithium *** results exhibit that the nanocomposite(mSiO_(2)@rGO)with high surface area(616.45 m^(2)·g^(–1))has chemical coupling bonds(Si–O–C)between SiO2 and rGO species,which would be favorable for lithium storage upon sy.ergistic ***,the mSiO_(2)@rGO exhibits a high specific capacity.of 1119.6 mAh·g^(–1)at 0.1 A·g^(–1)with outstanding cy.ling stability.92.5%retention over 1400 cy.les at 1.0 A·g^(–1)).

关键词： lithium cy.ling sy.ergistic

Ascending aortic dilatation rate after transcatheter aortic valve replacement in patients with bicuspid and tricuspid aortic stenosis: A multidetector computed tomography.follow-up study

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World Journal of Emergency.Medicine 2019年第4期10卷 197-204页

作者： y.-xin He Jia-qi Fan Qi-feng Zhu Qi-jing Zhou Ju-bo Jiang Li-han Wang Stella ng xian-bao Liu Jian-an Wang Department of Cardiology the Second Affiliated HospitalZhejiang University School of MedicineHangzhou 310009China Department of Radiology the Second Affiliated HospitalZhejiang University School of MedicineHangzhou 310009China

BACKGROUND: Current data is lacking about the progression of ascending aortic dilatation after transcatheter aortic valve replacement(TAVR) in aortic stenosis(AS) patients with bicuspid aortic valve(BAV) and tricuspid aortic valve(TAV). This study.aims to assess the ascending aortic dilatation rate(mm/y.ar) after TAVR in patients with BAV versus TAV using a multidetector computed tomography.MDCT) fol ow-up and to determine the predictors of ascending aortic dilatation ***: Severe AS patients undergoing TAVR from March 2013 to March 2018 at our center with MDCT follow-ups were included. BAV and TAV were identified using baseline MDCT. Baseline and follow-up MDCT images were analy.ed,and the diameters of ascending aorta were measured. Study.end point is ascending aortic dilatation rate(mm/y.ar). Furthermore,factors predicting ascending aortic dilatation rate were also ***: Two hundred and eight patients were included,comprised of 86 BAV and 122 TAV patients. Five,4,3,2,and 1-y.ar MDCT follow-ups were achieved in 7,9,30,46,and 116 patients. The ascending aortic diameter was significantly.increased after TAVR in both BAV group(43.7±4.4 mm vs. 44.0±4.5 mm;Png aortic dilatation rate was found between BAV and TAV group(0.2±0.8 mm/y.ar vs. 0.3±0.8 mm/y.ar,P=0.592). Multivariate linear regression revealed paravalvular leakage(PVL) grade was independently.associated with ascending aortic dilatation rate in the whole population and BAV group,but not TAV group. No aortic events occurred during ***: Ascending aortic size continues to grow after TAVR in BAV patients,but the dilatation rate is mild and comparable to that of TAV patients. PVL grade is associated with ascending aortic dilatation rate in BAV patients post-TAVR.

关键词： Transcatheter aortic valve replacement Aortic dilatation Bicuspid aortic valve

DNS of a spatially.evolving hy.ersonic turbulent boundary.lay.r at Mach 8

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Science China(Phy.ics,Mechanics & Astronomy. 2013年第7期56卷 1408-1418页

作者： LIAng xian LI XinLiang Laboratory.of High Temperature Gas Dy.amics Institute of MechanicsChinese Academy of Sciences

This paper reports the direct numerical simulation (DNS) for hy.ersonic turbulent boundary.lay.r over a flat-plate at Ma∞ =8 with the ratio of wall-to-freestream temperature equal to 1.9, which indicates an extremely.cold wall condition. It is primarily.used to assess the wall temperature effects on the mean velocity.profile, Walz equation, turbulent intensity. strong Rey.olds analogy.(SRA), and compressibility. The present high Mach number with cold wall condition induces strong compressibility.effects. As a result, the Morkovin's hy.othesis is not fully.valid and so the classical SRA is also not fully.consistent. However, some modified SRA is still valid at the far-wall region. It is also verified that the semi-local wall coordinate y. is better than conventional y. in analy.is of statistics features in turbulent boundary.lay.r (TBL) in hy.ersonic flow.

关键词： DNS compressibility.effects turbulent boundary.lay.r

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明代嘉鱼李憭与四邑公堤修筑始末考

湖北科技学院学报 2025年第1期45卷 10-18页

作者：朱志先张霞湖北科技学院人文与传媒学院湖北咸宁437100

从宋代开始,为解决长江水对江夏、嘉鱼、咸宁、蒲圻四地沿江造成的水患,四地主政者不断修筑江堤,各地利害关系不一,所修江堤效果不太理想。明代万历年间,在嘉鱼李憭的呼吁协调下,历时数年,加固老堤,修筑新堤,长达上百里,被誉为四邑公堤... 详细信息

从宋代开始,为解决长江水对江夏、嘉鱼、咸宁、蒲圻四地沿江造成的水患,四地主政者不断修筑江堤,各地利害关系不一,所修江堤效果不太理想。明代万历年间,在嘉鱼李憭的呼吁协调下,历时数年,加固老堤,修筑新堤,长达上百里,被誉为四邑公堤,有效抵制了江水泛滥所造成的危害。其间,李憭在四邑公堤的修筑筹备方面积极倡导和协调,在修筑制度方面采取因地制宜灵活变通的措施,在修筑经费方面据实情合理估算费用,保证四邑公堤顺利完工。

关键词：明代嘉鱼李憭四邑公堤水利

Global asy.ptotical stability.in a rational difference equation

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Applied Mathematics(A Journal of Chinese Universities) 2021年第1期36卷 51-59页

作者： LI xian-y. LI Wei Institute of Nonlinear Analy.is and Department of Big Data Science Zhejiang University of Science and TechnologyHangzhou 310023China

In this paper we prove a global attractivity.result for the unique positive equilibrium point of a difference equation,which improves and generalizes some known ones in the existing ***,our results completely.solve an... 详细信息

关键词： global asy.ptotic stability global attractivity Open problem and conjecture Schwartzian derivative,rational difference equation

The maximal Ly.punov exponent of a co-dimension two-bifurcation sy.tem excited by.a bounded noise

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Acta Mechanica Sinica 2012年第2期28卷 511-519页

作者： Sheng-Hong Li xian-Bin Liu State Key.Lab of Mechanics and Control for Mechanical Structures College of Aerospace EngineeringNanjing University of Aeronautics and Astronautics210014 NanjingChina School of Mathematics and Phy.ics Jiangsu University of Science and Technology212003 ZhenjiangChina

In the present paper, the maximal Ly.punov ex- ponent is investigated for a co-dimension two bifurcation sy.tem that is on a three-dimensional central manifold and subjected to parametric excitation by.a bounded noise. By.using a perturbation method, the expressions of the invari- ant measure of a one-dimensional phase diffusion process are obtained for three cases, in which different forms of the matrix B, that is included in the noise excitation term, are assumed and then, as a result, all the three kinds of singular boundaries for one-dimensional phase diffusion process are analy.ed. Via Monte-Carlo simulation, we find that the an- aly.ical expressions of the invariant measures meet well the numerical ones. And furthermore, the P-bifurcation behav- iors are investigated for the one-dimensional phase diffusion process. Finally. for the three cases of singular botmdaries for one-dimensional phase diffusion process, analy.ical ex- pressions of the maximal Ly.punov exponent are presented for the stochastic bifurcation sy.tem.

关键词： Maximal Ly.punov exponent Perturbationmethod. Bounded noise. Diffusion process

Pathogenic role of Lipoprotein Lipase for Aizheimer＇ s Disease

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中国药理通讯 2007年第2期24卷 54-55页

作者： T. LIU X. xian J. y. y. Miao G. LIU D. CHUI Neuroscience Research Institute and Department of Neurology Third Hospital of Peking University Japan National Institute for Longevity.Sciences Institute of Cardiovascular Sciences Peking University Beijing China

Optimization of N18 Zirconium Alloy.for Fuel Cladding of Water Reactors

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Journal of Materials Science & Technology 2012年第7期28卷 606-613页

作者： B.X. Zhou M. y. y.o Z.K. Li X.M. Wang J. Zhoua C.S. Long Q. Liu B.F. Luan Laboratory.for Mierostructures Shanghai University Shanghai 200444 China Institute of Materials Shanghai University Shaxighai 200072 China Northwest Institute for Non-ferrous Metal Research Xian 721014 China Key.Laboratory.for Nuclear Fuel and Materials Nuclear Power Institute of China Chengdu 610041 China College of Material Science and Engineering Chongqing University Chongqing 400044 China

In order to optimize the microstructure and composition of N18 zirconium alloy.（Zr-1Sn-0.35Nb-0.35Fe-0.1Cr, in mass fraction, %）, which was developed in China in 1990s, the effect of microstructure and composition variation on the corrosion resistance of the N18 alloy.has been investigated. The autoclave corrosion tests were carried out in super heated steam at 400 ~C/10.3 MPa, in deionized water or lithiated water with 0.01 mol/L LiOH at 360 ~C/18.6 MPa. The exposure time lasted for 300-550 day. according to the test temperature. The results show that the microstructure with a fine and uniform distribution of second phase particles （SPPs）, and the decrease of Sn content from 1% （in mass fraction, the same as follows） to 0.8% are of benefit to improving the corrosion resistance; It is detrimental to the corrosion resistance if no Cr addition. The addition of Nb content with upper limit （0.35%） is beneficial to improving the corrosion resistance. The addition of Cu less than 0.1% shows no remarkable influence upon the corrosion resistance for N18 alloy. Comparing the corrosion resistance of the optimized N18 with other commercial zirconium alloy., such as Zircaloy.4, ZIRLO, E635 and Ell0, the former shows superior corrosion resistance in all autoclave testing conditions mentioned above. Although the data of the corrosion resistance as fuel cladding for high burn-up has not been obtained y.t, it is believed that the optimized N18 alloy.is promising for the candidate of fuel cladding materials as high burn-up fuel assemblies. Based on the theory.that the microstructural evolution of oxide lay.r during corrosion process will affect the corrosion resistance of zirconium alloy., the improvement of corrosion resistance of the N18 alloy.by.obtaining the microstructure with nano-size and uniform distribution of SPPs, and by.decreasing the content of Sn and maintaining the content of Cr is discussed.

关键词： Zirconium alloy. Corrosion resistance Composition variation Microstructure

Fe_(2)TiO_(5)nanochains as anode for high-performance lithium-ion capacitor

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Rare Metals 2021年第9期40卷 2424-2431页

作者： Rong Kang Wang-Qin Zhu Sheng Li Bo-Bo Zou Liao-Liao Wang Guo-Chun Li xian-Hu Liu Dickon H.L.ng Jing-Xia Qiu y.n Zhao Fen Qiao Jia-Biao Lian Key.Laboratory.of Zhenjiang Institute for Energy ResearchJiangsu UniversityZhenjiang 212013China Key.Laboratory.of Materials Processing and Mold(Zhengzhou University. Ministry of EducationZhengzhou UniversityZhengzhou 450002China Department of Phy.ics The Chinese University of Hong KongShatinHong Kong 999077China

The unique cry.tal structure and multiple redox couples of iron titanate(Fe_(2)TiO_(5)) provide it a high theoretical capacity.and good cy.ling stability.when used as an electrode. In this study. the electrospinning method is employ.d to sy.thesize one-dimensional(1 D) Fe_(2)TiO_(5) nanochains. The as-prepared Fe_(2)TiO_(5) nanochains exhibited superior specific capacity.500 mAh·g^(-1) at 0.10 A·g^(-1)),excellent rate performance(180 mAh·g^(-1) at 5.00 A·g^(-1)),and good cy.ling stability.retaining 100% of the initial specific capacity.at a current density.of 1.00 A·g^(-1) after1000 cy.les). The as-assembled Fe_(2)TiO_(5)/SCCB lithiumion capacitor(LIC) also delivered a competitive energy.density.137.8 Wh·kg^(-1))andpowerdensity.11,250 W·kg^(-1)). This study.proves that the as-fabricated1 D Fe_(2)TiO_(5) nanochains are promising anode materials for high-performance LICs.

关键词： Lithium-ion capacitors High energy.power densities Anode material Fe_(2)TiO_(5)nanochains Electrospinning