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Thickness evolution of graphite-based cathodes in the dual ion batteries via in operando optical observation

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Journal of Energy Chemistry 2019年第2期28卷 122-128页

作者： Na Li Yaoda Xin Haosen Chen Shuqiang Jiao hanqing Jiang Wei-Li Song Daining fang Institute of Advanced Structure Technology Beijing Institute of Technology Beijing Key Laboratory of Lightweight Multi-Functional Composite Materials and Structures Beijing Institute of Technology Overseas Education College Nanjing University of Technology Collaborative Innovation Center of Electric Vehicles in Beijing Beijing Institute of Technology State Key Laboratory of Advanced Metallurgy University of Science and Technology Beijing School for Engineering of Matter Transport and EnergyArizona State University State Key Laboratory for Turbulence and Complex Systems College of EngineeringPeking University

Graphite has been currently considered as a promising cathode material in dual ion batteries(DIBs)due to its unique features of sp2 hybridized carbon and stacked two-dimensional layered ***,unexpected volume/thickness changes in the graphite cathodes,induced by the intercalation/deintercalation of anions with large molecular size have been known to be a critical problem in designing DIB *** understand the volume/thickness changes in the DIB electrodes,in operando optical observing apparatus has been employed to observe the cross-section view of a graphite-based cathode upon cycles in the present *** observation suggests that the cathode initially presented a huge irreversible thickness change(60%),and such thickness variation was prone to reduce and remain <20% in the following *** results from both in operando observation and electrochemical characterizations collectively indicate that the greater thickness variation at initial cycle should be attributed to both anion intercalation into graphite-based cathodes and irreversible decomposition of chemical components in the DIB *** method here highlights a universal route for fundamentally understanding the electrodes of huge volume variation.

关键词： Dual ion batteries In operando optical observation Graphite Cathode Thickness evolution

Comparison of Wind Sat and buoy-measured ocean products from 2004 to 2013

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Acta Oceanologica Sinica 2016年第1期35卷 67-78页

作者： ZHANG Lei SHI hanqing DU Huadong ZHU Enze ZHANG Zhihua fang Xun Institute of Meteorology and Oceanography PLA University of Science and Technology

To evaluate the ocean surface wind vector and the sea surface temperature obtained from WindSat, we compare these quantities over the time period from January 2004 to December 2013 with moored buoy measurements. The mean bias between the WindSat wind speed and the buoy wind speed is low for the low frequency wind speed product （WSPD_LF）, ranging from -0.07 to 0.08 m/s in different selected areas. The overall RMS error is 0.98 m/s for WSPD_LF, ranging from 0.82 to 1.16 m/s in different selected regions. The wind speed retrieval result in the tropical Ocean is better than that of the coastal and offshore waters of the United States. In addition, the wind speed retrieval accuracy ofWSPD LF is better than that of the medium frequency wind speed product. The crosstalk analysis indicates that the WindSat wind speed retrieval contains some cross influences from the other geophysical parameters, such as sea surface temperature, water vapor and cloud liquid water. The mean bias between the WindSat wind direction and the buoy wind direction ranges from -0.46° to 1.19° in different selected regions. The overall RMS error is 19.59° when the wind speed is greater than 6 m/s. Measurements of the tropical ocean region have a better accuracy than those of the US west and east coasts. Very good agreement is obtained between sea surface temperatures of WindSat and buoy measurements in the tropical Pacific Ocean; the overall RMS error is only 0.36℃, and the retrieval accuracy of the low latitudes is better than that of the middle and high latitudes.

关键词： WindSat polarimetric microwave radiometer wind vector sea surface temperature validation

Data driven reduced modeling for fluidized bed with immersed tubes based on PCA and Bi-LSTM neural networksAuthor links open overlay panel

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Particuology 2024年第8期91卷 1-18页

作者： Jiabin fang Wenkai Cu Huang Liu Huixin Zhang hanqing Liu Jinjia Wei Xiang Ma Nan Zheng School of Chemical Engineering and Technology Xi'an Jiaotong UniversityXi'anShaanxi 710049China

The fast and accurate reduced-order modeling of fluidized beds is a challenging task in the field of fluid dynamics,owing to their high dimensionality and nonlinear dynamic *** this study,a nonintrusive reduced order modeling method,the reduced order model based on principal component analysis and bidirectional long short-term memory networks(PBLSTM ROM),was developed to capture complex spatio-temporal dynamics of fluidized *** combining principal component analysis and Bidirectional long-short-term memory networks,the PBLSTM ROM effectively extracted dynamic evolution information without any prior knowledge of governing equations,enabling reduced-order modeling of unsteady flow *** PBLSTM ROM was validated using the solid volume fraction and gas velocity flow fields of a fluidized bed with immersed tubes,showing superior performance over both the PLSTM and PANN ROMs in accurately capturing temporal changes in the fluidization fields,especially in the region near immersed tubes where severe fluctuations ***,the PBLSTM ROM improved the simulation speed by five orders of magnitude compared to traditional computational fluid dynamics *** findings suggest that the PBLSTM ROM presents a promising approach for analyzing the complex fluid flows in engineering practice.

关键词： Reduced order modeling Fluidized bed Deep learning Bi-LSTM

Mechanistic insights of the controlled release capacity of polar functional group in transdermal drug delivery system:the relationship of hydrogen bonding strength and controlled release capacity

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Acta Pharmaceutica Sinica B 2020年第5期10卷 928-945页

作者： Zheng Luo Chao Liu Peng Quan Degong Yang hanqing Zhao Xiaocao Wan Liang fang Department of Pharmaceutical Sciences School of PharmacyShenyang Pharmaceutical Universityshenyang 110016China

Background:Hydrogen bonding interaction was considered to play a critical role in controlling drug release from transdermal ***,the quantitative evaluation of hydrogen bonding strength between drug and polar functional group was rarely reported,and the relationship between hydrogen bonding strength and controlled release capacity of pressure sensitive adhesive(PSA)was not well *** present study shed light on this ***:Acrylate PSAs with amide group were synthesized by a free radical-initiated solution *** drugs,i.e.,etodolac,ketoprofen,gemfibrozil,zolmitriptan,propranolol and lidocaine,were selected as model *** vitro drug release and skin permeation experiments and in vivo pharmacokinetic experiment were *** correlation analysis,fourier-transform infrared spectroscopy and molecular simulation were conducted to provide molecular details of drug-PSA *** test,rheology study,and modulated differential scanning calorimetry study were performed to scrutinize the free volume and molecular mobility of ***:Release rate of all six drugs from amide PSAs decreased with the increase of amide group concentrations;however,only zolmitriptan and propranolol showed decreased skin permeation *** was found that drug release was controlled by amide group through hydrogen bonding,and controlled release extent was positively correlated with hydrogen bonding ***:From these results,we concluded that drugs with strong hydrogen bond forming ability and high skin permeation were suitable to use amide PSAs to regulate their release rate from patch.

关键词： Controlled release Polar functional group Hydrogen bonding strength Pharmacokinetics Pressure sensitive adhesive Hydrogen bonding interaction Transdermal patch Stratum corneum

Combined yeast culture and organic selenium supplementation during late gestation and lactation improve preweaning piglet performance by enhancing the antioxidant capacity and milk content in nutrient-restricted sows

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Animal Nutrition 2020年第2期6卷 160-167页

作者： Shihai Zhang Zhihui Wu Jinghui Heng hanqing Song Min Tian fang Chen Wutai Guan Guangdong Province Key Laboratory of Animal Nutrition Control College of Animal ScienceSouth China Agricultural UniversityGuangzhou510642China College of Animal Science and National Engineering Research Center for Breeding Swine Industry South China Agricultural UniversityGuangzhou510642China

This study was conducted to investigate the effects of dietary supplementation with yeast culture(YC)and organic selenium(Se)during late gestation and lactation on reproductive performance,milk quality,piglet preweaning performance,antioxidant capacity,and secretion of immunoglobulin in multiparous sows.A total of 160 healthy cross-bred sows(Landrace×Yorkshire,mean parity 4.1±0.3)were randomly assigned to 4 groups as follows:1)high nutrient(HN),3,420 kcal/kg digestible energy(DE)and 18.0%crude protein(CP);2)low nutrient(LN),3,240 kcal/kg DE and 16.0%CP;3)LN+YC,LN diet+10 g/kg YC;4)LN+YC+Se,LN diet+10 g/kg YC+organic Se(1 mg/kg Se).Feeding trials of sows started from d 85 of pregnancy to d 35 of *** with sows in the LN group,sows fed the LN+YC+Se diet had greater litter weaning weight,average litter gain,and milk fat content(14-d and25-d milk)(P<0.05).The content of malonaldehyde(MDA)(colostrum and 14-d milk)was lesser,and the activity of glutathione peroxidase(GSH-Px)(colostrum and 25-d milk)was greater when sows were fed the LN+YC+Se diet,compared with sows fed the LN diet(P<0.05).Supplementation of YC and organic Se in the nutrient-restricted diet improved sows’reproductive performance and pig weaning body weight by enhancing the antioxidant capacity and fat content in milk.

关键词： Yeast culture Organic selenium Reproductive performance Antioxidant status Sow

Rechargeable Metasurfaces for Dynamic Color Display Based on a Compositional and Mechanical Dual-Altered Mechanism

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Research 2023年第1期2022卷 367-377页

作者： Le Yang Xiaorong Hong Jiafang Li Chang-Yin Ji Yu Han Shanshan Chen hanqing Jiang Wei-Li Song Hao-Sen Chen Daining fang Beijing Key Laboratory of Lightweight Multi-Functional Composite Materials and Structures Institute of Advanced Structure TechnologyBeijing Institute of TechnologyBeijing 100081China Key Lab of Advanced Optoelectronic Quantum Architecture and Measurement(Ministry of Education) Beijing Key Lab of Nanophotonics e Ultrafine Optoelectronic SystemsSchool of PhysicsBeijing Institute of TechnologyBeijing 100081China School of Engineering Westlake UniversityHangzhou 310024China

Dynamic color display can be realized by tunable optical metasurfaces based on the compositional or structural ***,it is still a challenge to realize the efficient modulation by a single-field ***,we report a novel compositional and mechanical dual-altered rechargeable metasurface for reversible and broadband optical reconfiguration in both visible and near-infrared wavelength *** employing a simple fabrication and integration strategy,the continuous optical reconfiguration is manipulated through an electro-chemo-mechanical coupled process in a lithium ion battery,where lithiation and delithiation processes occur dynamically under a low electric voltage(<1.5 V).By controlling the phase transformation from Si to Li,Si,both structural morphology and optical scattering could be rapidly and dramatically tailored within 30s,exhibiting high-contrast colorization and decolorization in a large-area nanofilm and showing long cyclic *** wide-angle reconfiguration of high-resolution structural colors in bowtie metasurfaces is demonstrated from anomalous *** results provide a multifield mechanism for reconfigurable photonic devices,and the new platform can be introduced to the multidimensional information encryption and storage.

关键词： scattering figuration Dynamic

Interfacial engineering of atomic platinum-doped molybdenum carbide quantum dots for high-rate and stable hydrogen evolution reaction in proton exchange membrane water electrolysis

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Nano Research 2023年第10期16卷 12186-12195页

作者： Lulu Chen Yichao Huang Yanping Ding Ping Yu fang Huang Wenbo Zhou Limin Wang Yangyang Jiang Haitao Li hanqing Cai Lin Wang Hang Wang Meihong Liao Lianming Zhao Zhuangjun Fan State Key Laboratory of Heavy Oil Processing School of Materials Science and EngineeringChina University of Petroleum(East China)Qingdao 266580China Shandong Saikesaisi Hydrogen Energy Co. LtdJinan 250013China School of Mechanical and Electronic Engineering Qingdao Binhai UniversityQingdao 266555China

Platinum(Pt)-based electrocatalysts remain the only practical cathode catalysts for proton exchange membrane water electrolysis(PEMWE),due to their excellent catalytic activity for acidic hydrogen evolution reaction(HER),but are greatly limited by their low reserves and high ***,we report an interfacial engineering strategy to obtain a promising low-Pt loading catalyst with atomically Pt-doped molybdenum carbide quantum dots decorated on conductive porous carbon(Pt-MoCx@C)for high-rate and stable HER in *** from the strong interfacial interaction between Pt atoms and the ultra-small MoCx quantum dots substrate,the Pt-MoCx catalyst exhibits a high mass activity of 8.00 A·mgPt−1,5.6 times higher than that of commercial 20 wt.%Pt/C ***,the strong interfacial coupling of Pt and MoCx substrate greatly improves the HER stability of the Pt-MoCx *** functional theory studies further confirm the strong metal-support interaction on Pt-MoCx,the critical role of MoCx substrate in the stabilization of surface Pt atoms,as well as activation of MoCx substrate by Pt atoms for improving HER durability and *** optimized Pt-MoCx@C catalyst demonstrates>2000 h stability under a water-splitting current of 1000 mA·cm^(−2)when applied to the cathode of a PEM water electrolyzer,suggesting the potential for practical applications.

关键词： proton exchange membrane(PEM)water electrolysis hydrogen evolution reaction electrocatalysts molybdenum carbides platinum

基于统计学岩石物理模型的火山岩横波速度预测方法

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地球科学 2023年第8期48卷 2993-3006页

作者：乔汉青刘财方慧朱威中国地质科学院地球物理地球化学勘查研究所河北廊坊065000 国家现代地质勘查工程技术研究中心河北廊坊065000 吉林大学地球探测科学与技术学院吉林长春130026

火山岩储层因蕴藏地热、矿产、油气等资源,受到各国学者的广泛关注.横波速度是地震AVO分析、储层特征描述和流体识别的必要信息,因受限于采集技术和采集成本等因素,测井资料中常常缺失横波速度信息.基于统计学岩石物理反演方法和Xu-Whit... 详细信息

火山岩储层因蕴藏地热、矿产、油气等资源,受到各国学者的广泛关注.横波速度是地震AVO分析、储层特征描述和流体识别的必要信息,因受限于采集技术和采集成本等因素,测井资料中常常缺失横波速度信息.基于统计学岩石物理反演方法和Xu-White岩石物理模型,提出了一种适用于火山岩储层的统计学岩石物理模型横波速度预测方法.该方法利用XuWhite模型中砂的纵、横波速度和粘土相关孔隙纵横比作为关键岩石物理参数对岩石速度的影响,根据统计学岩石物理反演方法,首先通过已知参考井常规测井资料和Xu-White模型构建关键岩石物理参数的先验分布,其次利用先验分布代替固定参数值初始化Xu-White模型建立统计学岩石物理模型,再次基于贝叶斯反演理论,匹配目标井位实际纵波速度与模拟纵波速度,计算目标井位关键岩石物理参数后验信息,最后利用统计学岩石物理模型和目标井关键岩石物理参数的后验分布反演出目标井的横波速度信息.将该方法应用于中国东部南堡凹陷5号构造实际测井数据,得到的横波速度预测结果优于常规方法,证明了该方法的有效性和准确性.研究将为火山岩储层的后续勘探开发提供更准确的横波速度资料.

关键词：火山岩储层横波速度预测 Xu-White模型统计学岩石物理模型贝叶斯反演地球物理

高职生职业决策自我效能感与社会支持的关系研究

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教育学术月刊 2014年第2期 66-71页

作者：方翰青谭明江苏理工学院教育学院江苏理工学院职业教育研究院江苏理工学院杂志社

本研究主要采用"职业决策自我效能感量表"和"社会支持评定量表"等测量工具对303名高职生进行问卷调查,探讨其职业决策自我效能感的水平及其与社会支持的相关关系。结果表明,大部分高职生进行职业决策时自信心偏低;在性别、生源、独生子... 详细信息

本研究主要采用"职业决策自我效能感量表"和"社会支持评定量表"等测量工具对303名高职生进行问卷调查,探讨其职业决策自我效能感的水平及其与社会支持的相关关系。结果表明,大部分高职生进行职业决策时自信心偏低;在性别、生源、独生子女情况、兼职经历、工作意向等方面高职生职业决策自我效能感不存在显著差异;在年级方面存在极其显著的差异;职业决策自我效能感与社会支持存在显著正相关;社会支持中的主观支持和客观支持两因子对职业决策自我效能感具有极其显著的预测作用。

关键词：高职生职业决策自我效能感社会支持