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Simulation of the Equatorially Asymmetric Mode of the Hadley Circulation in CMIP5 Models

Advances in Atmospheric Sciences 2015年第8期32卷 1129-1142页

作者： feng Juan li Jianping ZHU Jianlei li fei SUN Cheng College of Global Change and Earth System Science Beijing Normal University State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics Institute of Atmospheric Physics Chinese Academy of Sciences Joint Center for Global Change Studies Department of Lower Atmosphere Observation Research Institute of Atmospheric PhysicsChinese Academy of Sciences

The tropical Hadley circulation （HC） plays an important role in influencing the climate in the tropics and extra-tropics. The realism of the climatological characteristics, spatial structure, and temporal evolution of the long-term variation of the principal mode of the annual mean HC （i.e., the equatorially asymmetric mode, EAM） was examined in model simulations from the Coupled Model Intercomparison Project Phase 5 （CMIP5）. The results showed that all the models are moderately successful in capturing the HC＇s climatological features, including the spatial pattern, meridional extent, and intensity, but not the spatial or temporal variation of the EAM. The possible reasons for the poor simulation of the long-term variability of the EAM were explored. None of the models can successfully capture the differences in the warming rate between the tropical Southern Hemisphere （SH） and Northern Hemisphere （NH）, which is considered to be an important driver for the variation of the AM. Most of the models produce a faster warming in the NH than in the SH, which is the reverse of the observed trend. This leads to a reversed trend in the meridional gradient between the SH and NH, and contributes to the poor simulation of EAM variability. Thus, this aspect of the models should be improved to provide better simulations of the variability of the HC. This study suggests a possible reason for the poor simulation of the HC, which may be helpful for improving the skill of the CMIP5 models in the future.

关键词： tropical Hadley circulation equatorially asymmetric mode CMIP5 sea surface temperature

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A bipolar modified separator using TiO2 nanosheets anchored on N-doped carbon scaffold for high-performance li–S batteries

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Journal of Materials Science & Technology 2020年第20期52卷 152-158页

作者： Na li fei Chen Xiangtao Chen Zhongxu Chen Yang Qi Xiaodong li Xudong Sun Key Laboratory for Anisotropy and Texture of Materials(Ministry of Education) School of Materials Science and EngineeringNortheastern UniversityShenyang 110819China College of Environmental and Chemical Engineering Dalian UniversityDalian 116622China

lithium-sulfur batteries hold promise for next generation batteries due to their high theoretical energy density and low ***,the rapid capacity fading caused by the shuttle of polysulfide between two electrodes severely hinders the practical application of li-S *** address the issue,we reported a three-dimensional heterostructured TiO2 nanosheets/N-doped carbon(TO/NC),which is coated on a commercial polypro pylene(PP) separator,as an efficient barrier for li-S *** TO/NC coating layer provides a bipolar chemical adsorption of lithium polysulfides(liPSs) via TiO2 nanosheets with exposed(001) facets and N-doped carbon,showing high trapping capacity and remarkable electrocatalytic activity for *** slurry-bladed carbon black/sulfur cathode with 64 wt% sulfur offers outstanding performance with an initial capacity of 1314 mAh g^-1 at 0.2 *** 900 cycles,the cell still maintains the capacity of 448 mA h g^-1 at a 1 C rate with a degradation rate of only 0.055% per *** separator reported in this work holds great promise for the development of high-energy li-S batteries.

关键词： lithium-sulfur batteries N-doped carbon Separator TiO2 Nanosheets

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Constraints on active and sterile neutrinos in an interacting dark energy cosmology

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Science China(Physics,Mechanics & Astronomy) 2020年第9期63卷 16-29页

作者： Lu feng Dong-Ze He Hai-li li Jing-fei Zhang Xin Zhang College of Physical Science and Technology Shenyang Normal UniversityShenyang110034China Department of Physics College of SciencesNortheastern UniversityShenyang 110819China Ministry of Education’s Key Laboratory of Data Analytics and Optimization for Smart Industry Northeastern UniversityShenyang 110819China Center for High Energy Physics Peking UniversityBeijing 100080China

We investigate the impacts of dark energy on constraining massive(active/sterile)neutrinos in interacting dark energy(IDE)models by using the current *** employ two typical IDE models,the interacting w cold dark matter(IwCDM)model and the interacting holographic dark energy(IHDE)model,to make an *** avoid large-scale instability,we use the parameterized post-Friedmann approach to calculate the cosmological perturbations in the IDE *** cosmological observational data used in this work include the Planck cosmic microwave background(CMB)anisotropies data,the baryon acoustic oscillation data,the type Ia supernovae data,the direct measurement of the Hubble constant,the weak lensing data,the redshift-space distortion data,and the CMB lensing *** find that the dark energy properties could influence the constraint limits of active neutrino mass and sterile neutrino parameters in the IDE *** also find that the dark energy properties could influence the constraints on the coupling strength parameterβ,and a positive coupling constant,β>0,can be detected at the 2.5σstatistical significance for the IHDE+νs model by using the all-data *** addition,we also discuss the"Hubble tension"issue in these *** find that the H0 tension can be effectively relieved by considering massive sterile neutrinos,and in particular in the IHDE+νsmodel the H0 tension can be reduced to be at the 1.28σlevel.

关键词： interacting dark energy neutrino mass active neutrinos sterile neutrinos Hubble tension

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控制方向未知的受限多智能体系统的预设时间模糊控制

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工程科学学报 2025年第1期47卷 121-129页

作者：李菲周超范利蓉王芳燕山大学理学院秦皇岛066004 河北农业大学海洋学院秦皇岛066003

综合考虑受控制方向未知、输入受限和状态时延影响的有领导者多智能体系统的编队控制问题,设计基于模糊逻辑系统的预设时间一致性控制策略.为了保证编队输出误差在预设时间内满足预定的约束范围要求,引入预设时间性能函数,构造Lyapunov-... 详细信息

综合考虑受控制方向未知、输入受限和状态时延影响的有领导者多智能体系统的编队控制问题,设计基于模糊逻辑系统的预设时间一致性控制策略.为了保证编队输出误差在预设时间内满足预定的约束范围要求,引入预设时间性能函数,构造Lyapunov-Krasovskii(L-K)泛函解决状态时延问题,将外界干扰和L-K泛函的导数中的部分项定义为未知非线性函数,并利用模糊逻辑系统对其进行估计,利用Nussbaum函数和均值定理分别处理控制方向未知和输入受限问题,基于以上设计,提出预设时间模糊控制策略,并通过Lyapunov稳定性理论,分析闭环系统的有界稳定性,数值对比仿真和两级化学反应器应用仿真说明控制方法的有效性.

关键词：多智能体系统状态时延输出误差约束输入受限控制方向未知

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Perovskite fluoride NaNiF_(3) with hollow micron sphere structure as anode for li-ion hybrid capacitors

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Rare Metals 2022年第10期41卷 3370-3380页

作者： Ai-Jun Jiao Jian-fei Gao Zheng-Hua He Jing-feng Hou ling-Bin Kong State Key Laboratory of Advanced Processing and Recycling of Non-Ferrous Metals Lanzhou University of TechnologyLanzhou730050China

lithium-ion hybrid capacitors(liHCs) are gaining more attention and applications because they break the performance limitations of supercapacitors(SCs) and lithium-ion batteries(liBs).However,the difference of energy storage mechanism between anode and cathode is a problem that must be faced by li-ion hybrid *** selection of suitable anode and cathode materials is one of the effective ways to solve this ***,we synthesized hollow spherical perovskite fluoride NaNiF3 by a simple and safe *** specific capacity of NaNiF3 is 142 mAh·g^(-1) at 0.1 A·g^(-1) for 1000 *** mechanism in the cycling of NaNiF3 electrodes was investigated using ex situ X-ray photoelectron spectroscopy(XPS),which is typical of the conversion ***,the NaNiF_(3)//activated carbon(AC) li-ion hybrid capacitor assembled and showed better energy density(69 Wh·kg^(-1)) and power density(5699 W·kg^(-1)).Its capacity retention after long cycling was 79%.The use of NaNiF3 expands the choice of electrode materials for liHCs and extends their practical applications.

关键词： Perovskite fluoride Anode Conversion mechanism li-ion hybrid capacitor

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三倍体湘云鲫性腺指数分析

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水产学报 2002年第2期26卷 111-114页

作者：刘少军孙远东黎双飞冯浩李建中周工建张轩杰刘筠湖南师范大学生命科学学院湖南师范大学生命科学学院湖南长沙410081

对三倍体湘云鲫和作为对照的二倍体日本白鲫的性指数进行了比较分析。三倍体湘云鲫的卵巢指数、精巢指数、脂肪型“性体”指数都分别低于日本白鲫的卵巢指数、精巢指数及两者的平均值。日本白鲫的卵巢指数是湘云鲫卵巢指数的 2 .85倍 ,... 详细信息

对三倍体湘云鲫和作为对照的二倍体日本白鲫的性指数进行了比较分析。三倍体湘云鲫的卵巢指数、精巢指数、脂肪型“性体”指数都分别低于日本白鲫的卵巢指数、精巢指数及两者的平均值。日本白鲫的卵巢指数是湘云鲫卵巢指数的 2 .85倍 ,日本白鲫的精巢指数是湘云鲫精巢指数的 1.94倍 ,日本白鲫卵巢和精巢的平均指数是湘云鲫脂肪型“性体”指数的 5 .6 0倍。具脂肪型“性体”的湘云鲫生长速度最快 ,其次是雌性湘云鲫 ,最后是雄性湘云鲫。根据性体指数对照 ,说明三倍体湘云鲫的性腺发育受到不同程度的抑制 ,其中脂肪型“性体”中生殖细胞的发育完全被抑制 ;卵巢发育的抑制程度大于精巢 ,其主要抑制效应表现在具有卵黄的卵母细胞的大幅度减少。无论从生殖角度还是生长角度来考虑 ,具有脂肪型“性体”的湘云鲫是最理想的不育三倍体鱼

关键词：三倍体湘云鲫性腺发育性腺指数不育

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Behavior of MgO·Al_2O_3 Based Inclusions in Alloy Steel During Refining Process

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Journal of Iron and Steel Research International 2010年第7期17卷 1-6页

作者： YANG Shu-feng li Jing-she ZHANG li-feng Kent Peaslee WANG Zai-fei School of Metallurgical and Ecological Engineering University of Science and Technology Beijing Beijing 1000.83 China Department of Materials Science and Engineering Missouri University of Science and Technology Rolla 65401 M. issouri USA

The transformation of MgO· Al2O based inclusions in alloy steel during refining has been studied by in- dustrial trials. Besides Factsage software is used to sttidy the formation and modification of spinel inclusions in alloy steel using calcium treatment during refining process. The results show that the transformation sequence of inclu- sions is：MgO· Al2O→CaO-Al2O3-MgO complex inclusions--→MgO· Al2O, and under present experimental con- dition, in order to avoid forming MgO· Al2O inclusions the content of dissolved Ca in the molten steel has to reach 1 × 10-6. Also the results show that when more calcium was added to molten steel, the content of Alz 03 and MgO will be lower. Besides, increasing the content of CaO in the inclusions will increase even if tlae content of SiO2 changes little.

关键词： alloy steel non-metallic inclusion MgO· Al2O spinel thermodynamics

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诱导后上清液在BMSCs向神经元样细胞分化中的作用

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临床医药实践 2008年第7期17卷 487-489页

作者：王飞冯鹏李光来连霞山西医科大学第二医院山西太原030001

目的:研究体外使用SHH、Ra、Fn组成的诱导体系诱导骨髓间充质细胞后的上清液对BMSCs向神经细胞分化的作用。方法:从健康志愿者髂骨处抽取骨髓4mL,体外分离、培养、扩增后用400ng/LSHH、0.5μmolRa和5μmolFn组成的诱导体系进行诱导,取... 详细信息

目的:研究体外使用SHH、Ra、Fn组成的诱导体系诱导骨髓间充质细胞后的上清液对BMSCs向神经细胞分化的作用。方法:从健康志愿者髂骨处抽取骨髓4mL,体外分离、培养、扩增后用400ng/LSHH、0.5μmolRa和5μmolFn组成的诱导体系进行诱导,取诱导后12,24h的诱导液上清分别作用于BMSCs。7d后使用倒置显微镜和免疫组织化学方法观察诱导前后细胞的变化。结果:诱导7d之后各组均有部分细胞胞体收缩、伸长突起,表现为神经细胞的形态。12h组同SHH+Ra+Fn组NSE、MAP-2阳性细胞比例差异无显著(P>0.05)。12h组分化率高于24h组(P<0.05)。结论:12h后诱导液上清可以有效地诱导BMSCs向神经细胞分化。

关键词：骨髓间充质细施神经细胞细胞分化诱导后上清液

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Wearing prediction of stellite alloys based on opposite degree algorithm

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Rare Metals 2015年第2期34卷 125-132页

作者： Xiao-Guang Yue Guang Zhang Qu Wu fei li Xian-feng Chen Gao-feng Ren Mei li School of Resources and Environmental Engineering Wuhan University of Technology School of Materials Science and Engineering Shanghai University

In order to predict the wearing of stellite alloys, the related methods of rare metals data processing were discussed. The method of opposite degree （OD） algorithm was put forward to predict the wearing of stellite alloys. OD algorithm is based on prior numerical data, posterior numerical data and the opposite degree between numerical forecast data. To compare the performance of predicted results based on different algorithms, the back propagation （BP） and radial basis function （RBF） neural network methods were introduced. Predicted results show that the relative error of OD algorithm is smaller than those of BP and RBF neural network methods. OD algorithm is an effective method to predict the wearing of stellite alloys and it can be applied in practice.

关键词： Opposite degree algorithm Stellite alloyswearing Back propagation neural network Radial basisfunction neural network

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One-step electrochemical in-situ li doping and liF coating enable ultra-stable cathode for sodium ion batteries

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Journal of Energy Chemistry 2023年第7期82卷 228-238,I0005页

作者： Jiameng feng Chaoliang Zheng De Fang Jianling li State Key Laboratory of Advanced Metallurgy School of Metallurgical and Ecological EngineeringUniversity of Science and Technology BeijingBeijing 100083China

Despite of the higher energy density and inexpensive characteristics,commercialization of layered oxide cathodes for sodium ion batteries(SIBs)is limited due to the lack of structural stability at the high ***,the one-step electrochemical in-situ li doping and liF coating are successfully achieved to obtain an advanced Na0.79lix[li_(0.13)Ni_(0.20)Mn_(0.67)]O_(2)@liF(Nali-LNM@liF)cathode with superlattice *** results demonstrate that the li^(+)doped into the alkali metal layer by electrochemical cycling act as"pillars"in the form of li-li dimers to stabilize the layered *** supplementation of li to the superlattice structure inhibits the dissolution of transition metal ions and lattice ***,the in-situ liF coating restrains side reactions,reduces surface cracks,and greatly improves the cycling *** electrochemical in-situ modification strategy significantly enhances the electrochemical performance of the *** Nali-LNM@liF exhibits high reversible specific capacity(170.6 m A h g^(-1)at 0.05 C),outstanding capacity retention(92.65%after 200 cycles at 0.5 C)and excellent rate performance(80 mA h g^(-1)at 7 C)in a wide voltage range of 1.5-4.5 *** novel method of in-situ modification by electrochemical process will provide a guidance for the rational design of cathode materials for SIBs.

关键词： Sodium ion batteries Layered oxides In-situ li doping In-situ liF coating Superlattice structure

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